Include patched FDK-AAC in the repository

The initial idea was to get the DAB+ patch into upstream, but since
that follows the android source releases, there is no place for a custom
DAB+ patch there.

So instead of having to maintain a patched fdk-aac that has to have the
same .so version as the distribution package on which it is installed,
we prefer having a separate fdk-aac-dab library to avoid collision.

At that point, there's no reason to keep fdk-aac in a separate
repository, as odr-audioenc is the only tool that needs DAB+ encoding
support. Including it here simplifies installation, and makes it
consistent with toolame-dab, also shipped in this repository.

DAB+ decoding support (needed by ODR-SourceCompanion, dablin, etisnoop,
welle.io and others) can be done using upstream FDK-AAC.

27 files changed, 14166 insertions, 0 deletions

diff --git a/fdk-aac/libSACdec/include/sac_dec_errorcodes.h b/fdk-aac/libSACdec/include/sac_dec_errorcodes.h
new file mode 100644
index 0000000..ee8b9f8
--- /dev/null
+++ b/fdk-aac/libSACdec/include/sac_dec_errorcodes.h
@@ -0,0 +1,157 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: error codes for mpeg surround decoder
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_ERRORCODES_H
+#define SAC_DEC_ERRORCODES_H
+
+typedef enum {
+
+  __mps_error_start = -1000,
+
+  MPS_OK = 0,
+
+  /* generic/init errors */
+  MPS_NOTOK = __mps_error_start,
+
+  MPS_OUTOFMEMORY,
+  MPS_INVALID_HANDLE,
+  MPS_INVALID_PARAMETER,     /* SetParam not successfull */
+  MPS_UNSUPPORTED_HRTFMODEL, /* SetHRTFModel() not successfull */
+  MPS_UNSUPPORTED_HRTFFREQ,  /* SetHRTFModel() not successfull */
+
+  MPS_UNSUPPORTED_UPMIX_TYPE, /* CheckLevelTreeUpmixType() */
+  MPS_UNSUPPORTED_FORMAT, /* various functions; unknown aot or no_channels in
+                             filterbank */
+  MPS_OUTPUT_BUFFER_TOO_SMALL, /* Size of provided output time buffer is too
+                                  small */
+
+  /* ssc errors */
+  MPS_INVALID_PARAMETERBANDS, /* unsupported numParameterBands in
+                                 SpatialDecDecodeHeader() */
+  MPS_INVALID_TREECONFIG,
+  MPS_INVALID_HRTFSET,   /* SpatialDecDecodeHeader() */
+  MPS_INVALID_TTT,       /* SpatialDecDecodeHeader() */
+  MPS_INVALID_BOXIDX,    /* ecDataDec() */
+  MPS_INVALID_SETIDX,    /* ecDataDec() */
+  MPS_INVALID_QUANTMODE, /* SpatialDecParseSpecificConfig() */
+  MPS_UNEQUAL_SSC, /* FDK_SpatialDecCompareSpatialSpecificConfigHeader() */
+  MPS_UNSUPPORTED_CONFIG, /* number of core channels; 3DStereoInversion; */
+
+  /* parse errors */
+  MPS_PARSE_ERROR,
+  MPS_INVALID_TEMPSHAPE, /* SpatialDecParseFrameData() */
+
+  /* render errors */
+  MPS_WRONG_PARAMETERSETS,
+  MPS_WRONG_PARAMETERBANDS, /* decodeAndMapFrameSmg() */
+  MPS_WRONG_TREECONFIG,
+  MPS_WRONG_BLINDCONFIG,
+  MPS_WRONG_OTT,
+  MPS_WRONG_QUANTMODE,
+  MPS_RESDEC_ERROR,
+  MPS_APPLY_M2_ERROR, /* error in applyM2x()selection */
+
+  __mps_error_end
+
+} SACDEC_ERROR;
+
+#endif
diff --git a/fdk-aac/libSACdec/include/sac_dec_lib.h b/fdk-aac/libSACdec/include/sac_dec_lib.h
new file mode 100644
index 0000000..9913279
--- /dev/null
+++ b/fdk-aac/libSACdec/include/sac_dec_lib.h
@@ -0,0 +1,477 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: Space Decoder
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_LIB_H
+#define SAC_DEC_LIB_H
+
+#include "common_fix.h"
+#include "FDK_audio.h"
+#include "sac_dec_errorcodes.h"
+#include "FDK_bitstream.h"
+#include "FDK_qmf_domain.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * \brief  MPEG Surround input data interface mode.
+ **/
+typedef enum {
+  SAC_INTERFACE_QMF =
+      0, /*!< Use QMF domain interface for the input downmix audio.  */
+  SAC_INTERFACE_TIME, /*!< Use time domain interface for the input downmix
+                         audio. */
+  SAC_INTERFACE_AUTO  /*!<          */
+} SAC_INPUT_CONFIG;
+
+/**
+ * \brief  MPEG Surround output mode.
+ **/
+typedef enum {
+  SACDEC_OUT_MODE_NORMAL =
+      0, /*!< Normal multi channel processing without output restrictions. */
+  SACDEC_OUT_MODE_BINAURAL, /*!< Two channel output with binaural processsing.
+                             */
+  SACDEC_OUT_MODE_STEREO,   /*!< Always two channel output mode.   */
+  SACDEC_OUT_MODE_6CHANNEL  /*!< Always process with 5.1 channel output.  */
+} SAC_DEC_OUTPUT_MODE;
+
+/**
+ * \brief  MPEG Surround binaural HRTF model.
+ *         HRTF will be applied only in combination with upmixtype
+ *SAC_UPMIX_TYPE_BINAURAL.
+ **/
+typedef enum {
+  SAC_BINAURAL_HRTF_KEMAR = 0,
+  SAC_BINAURAL_HRTF_VAST,
+  SAC_BINAURAL_HRTF_MPSVT,
+  SAC_BINAURAL_SINGLE_HRTFS
+} SAC_BINAURAL_HRTF_MODEL;
+
+/**
+ * \brief  MPEG Surround decoder instance available.
+ **/
+typedef enum {
+  SAC_INSTANCE_NOT_FULL_AVAILABLE =
+      0, /*!< MPEG Surround decoder instance not full available. */
+  SAC_INSTANCE_FULL_AVAILABLE /*!< MPEG Surround decoder instance full
+                                 available. */
+} SAC_INSTANCE_AVAIL;
+
+/**
+ * \brief  MPEG Surround decoder dynamic parameters.
+ *
+ * Use mpegSurroundDecoder_SetParam() function to configure internal status of
+ * following parameters.
+ */
+typedef enum {
+  SACDEC_OUTPUT_MODE = 0x0001, /*!< Set MPEG Surround decoder output mode. See
+                                  SAC_DEC_OUTPUT_MODE. */
+  SACDEC_BLIND_ENABLE =
+      0x0002, /*!< Multi channel output without MPEG Surround side info.    */
+  SACDEC_PARTIALLY_COMPLEX =
+      0x0003, /*!< Set partially complex flag for MPEG Surround.
+                    0: Use complex valued QMF data.
+                    1: Use real valued QMF data (low power mode) */
+  SACDEC_INTERFACE =
+      0x0004, /*!< Select signal input interface for MPEG Surround.
+                     Switch time interface off:  0
+                     Switch time interface on:   1 */
+  SACDEC_BS_DELAY = 0x0005, /*!< Select bit stream delay for MPEG Surround.
+                                   Switch bit stream delay off:  0
+                                   Switch bit stream delay on:   1 */
+  SACDEC_BINAURAL_QUALITY =
+      0x0102, /*!< Set binaural quality for MPEG Surround binaural mode.
+                   0: Low Complexity,
+                   1: High Quality */
+  SACDEC_BINAURAL_DISTANCE = 0x0103, /*!< Set perceived distance for binaural
+                                        playback (binaural mode only). The valid
+                                        values  range from 0 to 100. Where 100
+                                        corresponds to the farthest perceived
+                                        distance. */
+  SACDEC_BINAURAL_DIALOG_CLARITY =
+      0x0104, /*!< Set dialog clarity (for binaural playback).
+                   The valid values range from 0 to 100. */
+  SACDEC_BINAURAL_FRONT_ANGLE = 0x0105, /*!< Set angle between the virtual front
+                                           speaker pair (binaural mode only).
+                                             The valid range is from 0 to 180
+                                           angular degrees. */
+  SACDEC_BINAURAL_BACK_ANGLE = 0x0106,  /*!< Set angle between the virtual back
+                                           speaker pair (binaural mode only).  The
+                                           valid range is from 0 to 180 angular
+                                           degrees. */
+  SACDEC_BINAURAL_PRESET = 0x0107, /*!< Set a virtual speaker setup preset for
+                                      binaural playback (binaural mode only).
+                                      This meta-parameter implicitly modifies
+                                      the following parameters:
+                                          SACDEC_BINAURAL_DISTANCE,
+                                          SACDEC_BINAURAL_DIALOG_CLARITY,
+                                          SACDEC_BINAURAL_FRONT_ANGLE and
+                                          SACDEC_BINAURAL_BACK_ANGLE.
+                                        The following presets are available:
+                                          1: Dry room
+                                          2: Living room (default)
+                                          3: Cinema */
+
+  SACDEC_BS_INTERRUPTION =
+      0x0200, /*!< If the given value is unequal to 0 hint the MPEG Surround
+                 decoder that the next input data is discontinuous, because of
+                 frame loss, seeking, etc. Announce the decoder that the
+                 bitstream data was interrupted (fSync = 0). This will cause the
+                 surround decoder not to parse any new bitstream data until a
+                 new header with a valid Spatial Specific Config and a
+                 independently decodable frame is found. Specially important
+                 when the MPEG Surround data is split accross several frames
+                 (for example in the case of AAC-LC downmix with 1024
+                 framelength and 2048 surround frame length) and a discontinuity
+                 in the bitstream data occurs. If fSync is 1, assume that MPEG
+                 Surround data is in sync (out of band config for example). */
+  SACDEC_CLEAR_HISTORY = 0x0201, /*!< If the given value is unequal to 0 clear
+                                    all internal states (delay lines, QMF
+                                    states, ...) of the MPEG Surround decoder.
+                                    This will cause a discontinuity in the audio
+                                    output signal. */
+
+  SACDEC_CONCEAL_NUM_KEEP_FRAMES =
+      0x0301, /*!< Error concealment: The Number of frames the module keeps the
+                 last spatial image before fading to the particular spatial
+                 scenario starts. The default is 10 frames. */
+  SACDEC_CONCEAL_FADE_OUT_SLOPE_LENGTH =
+      0x0302, /*!< Error concealment: Length of the slope (in frames) the module
+                 creates to fade from the last spatial scenario to the
+                 particular default scenario (downmix) in case of consecutive
+                 errors. Default is 5. */
+  SACDEC_CONCEAL_FADE_IN_SLOPE_LENGTH =
+      0x0303, /*!< Error concealment: Length of the slope (in frames) the module
+                 creates to fade from the default spatial scenario (downmix) to
+                 the current scenario after fade-out. Default parameter value
+                 is 5. */
+  SACDEC_CONCEAL_NUM_RELEASE_FRAMES =
+      0x0304 /*!< Error concealment: The number of error free frames before the
+                module starts fading from default to the current spatial
+                scenario. Default parameter value is 3 frames. */
+} SACDEC_PARAM;
+
+#define PCM_MPS INT_PCM
+
+/**
+ * \brief MPEG Surround decoder handle.
+ */
+typedef struct MpegSurroundDecoder CMpegSurroundDecoder;
+
+/**
+ * \brief  Check if the full MPEG Surround decoder instance is allocated.
+ *
+ * Check if the full MPEG Surround decoder instance is allocated.
+ *
+ * \param pMpegSurroundDecoder   A pointer to a decoder stucture.
+ *
+ * \return SACDEC_ERROR error code
+ */
+SAC_INSTANCE_AVAIL
+mpegSurroundDecoder_IsFullMpegSurroundDecoderInstanceAvailable(
+    CMpegSurroundDecoder *pMpegSurroundDecoder);
+
+/**
+ * \brief  Open one instance of the MPEG Surround decoder.
+ *
+ * Allocate one instance of decoder and input buffers.
+ * - Allocate decoder structure
+ * - Allocate input buffers (QMF/time/MPS data)
+ *
+ * \param pMpegSurroundDecoder   A pointer to a decoder handle; filled on
+ * return.
+ * \param splitMemoryAllocation  Allocate only outer layer of MPS decoder. Core
+ * part is reallocated later if needed.
+ * \param stereoConfigIndex      USAC: Save memory by opening the MPS decoder
+ * for a specific stereoConfigIndex. (Needs optimization macros enabled.)
+ * \param pQmfDomain             Pointer to QMF domain data structure.
+ *
+ * \return SACDEC_ERROR error code
+ */
+SACDEC_ERROR mpegSurroundDecoder_Open(
+    CMpegSurroundDecoder **pMpegSurroundDecoder, int stereoConfigIndex,
+    HANDLE_FDK_QMF_DOMAIN pQmfDomain);
+
+/**
+ * \brief  Init one instance of the MPEG Surround decoder.
+ *
+ * Init one instance of the MPEG Surround decoder
+ *
+ * \param pMpegSurroundDecoder  A pointer to a decoder handle;
+ *
+ * \return SACDEC_ERROR error code
+ */
+SACDEC_ERROR mpegSurroundDecoder_Init(
+    CMpegSurroundDecoder *pMpegSurroundDecoder);
+
+/**
+ * \brief Read and parse SpatialSpecificConfig.
+ *
+ * \param pMpegSurroundDecoder  A pointer to a decoder handle.
+ * \param hBs bitstream handle config parsing data source.
+ *
+ * \return SACDEC_ERROR error code
+ */
+SACDEC_ERROR mpegSurroundDecoder_Config(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, HANDLE_FDK_BITSTREAM hBs,
+    AUDIO_OBJECT_TYPE coreCodec, INT samplingRate, INT frameSize,
+    INT stereoConfigIndex, INT coreSbrFrameLengthIndex, INT configBytes,
+    const UCHAR configMode, UCHAR *configChanged);
+
+SACDEC_ERROR
+mpegSurroundDecoder_ConfigureQmfDomain(
+    CMpegSurroundDecoder *pMpegSurroundDecoder,
+    SAC_INPUT_CONFIG sac_dec_interface, UINT coreSamplingRate,
+    AUDIO_OBJECT_TYPE coreCodec);
+
+/**
+ * \brief Parse MPEG Surround data without header
+ *
+ * \param pMpegSurroundDecoder A MPEG Surrround decoder handle.
+ * \param hBs                  Bit stream handle data input source
+ * \param pMpsDataBits         Pointer to number of valid bits in extension
+ * payload. Function updates mpsDataBits while parsing bitstream.
+ * \param fGlobalIndependencyFlag Global independency flag of current frame.
+ *
+ * \return  Error code.
+ */
+int mpegSurroundDecoder_ParseNoHeader(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, HANDLE_FDK_BITSTREAM hBs,
+    int *pMpsDataBits, int fGlobalIndependencyFlag);
+
+/* #ifdef SACDEC_MPS_ENABLE */
+/**
+ * \brief Parse MPEG Surround data with header. Header is ancType, ancStart,
+ ancStop (4 bits total). Body is ancDataSegmentByte[i].
+ *
+ * \param pMpegSurroundDecoder A MPEG Surrround decoder handle.
+ * \param hBs                  Bit stream handle data input source
+ * \param pMpsDataBits         Pointer to number of valid bits in extension
+ payload. Function updates mpsDataBits while parsing bitstream. Needs to be a
+ multiple of 8 + 4 (4 bits header).
+ * \param coreCodec            The audio object type of the core codec handling
+ the downmix input signal.
+ * \param sampleRate           Samplerate of input downmix data.
+ * \param nChannels            Amount of input channels.
+ * \param frameSize            Amount of input samples.
+ * \param fGlobalIndependencyFlag Global independency flag of current frame.
+ *
+ * \return  Error code.
+ */
+int mpegSurroundDecoder_Parse(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                              HANDLE_FDK_BITSTREAM hBs, int *pMpsDataBits,
+                              AUDIO_OBJECT_TYPE coreCodec, int sampleRate,
+                              int frameSize, int fGlobalIndependencyFlag);
+/* #endif */
+
+/**
+ * \brief Apply MPEG Surround upmix.
+ *
+ * Process one downmix audio frame and decode one surround frame if it applies.
+ * Downmix framing can be different from surround framing, so depending on the
+ * frame size of the downmix audio data and the framing being used by the MPEG
+ * Surround decoder, it could be that only every second call, for example, of
+ * this function actually surround data was decoded. The returned value of
+ * frameSize will be zero, if no surround data was decoded.
+ *
+ * Decoding one MPEG Surround frame. Depending on interface configuration
+ * mpegSurroundDecoder_SetParam(self, SACDEC_INTERFACE, value), the QMF or time
+ * interface will be applied. External access to QMF buffer interface can be
+ * achieved by mpegSurroundDecoder_GetQmfBuffer() call before decode frame.
+ * While using time interface, pTimeData buffer will be shared as input and
+ * output buffer.
+ *
+ * \param pMpegSurroundDecoder A MPEG Surrround decoder handle.
+ * \param pTimeData            Pointer to time buffer. Depending on interface
+ * configuration, the content of pTimeData is ignored, and the internal QMF
+ * buffer will be used as input data source.
+ * Otherwise, the MPEG Surround processing is applied to the timesignal
+ * pTimeData. For both variants, the resulting MPEG
+ * Surround signal is written into pTimeData.
+ * \param timeDataSize         Size of pTimeData (available buffer size).
+ * \param timeDataFrameSize    Frame size of input timedata
+ * \param nChannels            Pointer where the amount of input channels is
+ * given and amount of output channels is returned.
+ * \param frameSize            Pointer where the amount of output samples is
+ * returned into.
+ * \param channelType          Array were the corresponding channel type for
+ * each output audio channel is stored into.
+ * \param channelIndices       Array were the corresponding channel type index
+ * for each output audio channel is stored into.
+ * \param mapDescr             Channep map descriptor for output channel mapping
+ * to be used (From MPEG PCE ordering to whatever is required).
+ *
+ * \return  Error code.
+ */
+int mpegSurroundDecoder_Apply(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                              INT_PCM *input, PCM_MPS *pTimeData,
+                              const int timeDataSize, int timeDataFrameSize,
+                              int *nChannels, int *frameSize, int sampleRate,
+                              AUDIO_OBJECT_TYPE coreCodec,
+                              AUDIO_CHANNEL_TYPE channelType[],
+                              UCHAR channelIndices[],
+                              const FDK_channelMapDescr *const mapDescr);
+
+/**
+ * \brief                       Deallocate a MPEG Surround decoder instance.
+ * \param pMpegSurroundDecoder  A decoder handle.
+ * \return                      No return value.
+ */
+void mpegSurroundDecoder_Close(CMpegSurroundDecoder *pMpegSurroundDecoder);
+
+/**
+ * \brief                       Free config dependent MPEG Surround memory.
+ * \param pMpegSurroundDecoder  A decoder handle.
+ * \return                      error.
+ */
+SACDEC_ERROR mpegSurroundDecoder_FreeMem(
+    CMpegSurroundDecoder *pMpegSurroundDecoder);
+
+/**
+ * \brief  Set one single MPEG Surround decoder parameter.
+ *
+ * \param pMpegSurroundDecoder  A MPEG Surrround decoder handle. Must not be
+ * NULL pointer.
+ * \param param                 Parameter to be set. See SACDEC_PARAM.
+ * \param value                 Parameter value. See SACDEC_PARAM.
+ *
+ * \return  0 on sucess, and non-zero on failure.
+ */
+SACDEC_ERROR mpegSurroundDecoder_SetParam(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, const SACDEC_PARAM param,
+    const INT value);
+
+/**
+ * \brief          Retrieve MPEG Surround decoder library info and fill info list with all depending library infos.
+ * \param libInfo  Pointer to library info list to be filled.
+ * \return         0 on sucess, and non-zero on failure.
+ **/
+int mpegSurroundDecoder_GetLibInfo(LIB_INFO *libInfo);
+
+/**
+ * \brief  Set one single MPEG Surround decoder parameter.
+ *
+ * \param pMpegSurroundDecoder  A valid MPEG Surrround decoder handle.
+ *
+ * \return  The additional signal delay caused by the module.
+ */
+UINT mpegSurroundDecoder_GetDelay(const CMpegSurroundDecoder *self);
+
+/**
+ * \brief  Get info on whether the USAC pseudo LR feature is active.
+ *
+ * \param pMpegSurroundDecoder  A valid MPEG Surrround decoder handle.
+ * \param bsPseudoLr            Pointer to return wether pseudo LR USAC feature
+ * is used.
+ *
+ * \return  0 on sucess, and non-zero on failure.
+ */
+SACDEC_ERROR mpegSurroundDecoder_IsPseudoLR(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, int *bsPseudoLr);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* #ifndef SAC_DEC_LIB_H */
diff --git a/fdk-aac/libSACdec/src/sac_bitdec.cpp b/fdk-aac/libSACdec/src/sac_bitdec.cpp
new file mode 100644
index 0000000..883e1e8
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_bitdec.cpp
@@ -0,0 +1,2167 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec bitstream decoder
+
+*******************************************************************************/
+
+#include "sac_bitdec.h"
+
+#include "sac_dec_errorcodes.h"
+#include "nlc_dec.h"
+#include "sac_rom.h"
+#include "FDK_matrixCalloc.h"
+#include "sac_tsd.h"
+
+enum {
+  ottVsTotInactiv = 0,
+  ottVsTotDb1Activ = 1,
+  ottVsTotDb2Activ = 2,
+  ottVsTotDb1Db2Activ = 3
+};
+
+static SACDEC_ERROR SpatialDecDecodeHelperInfo(
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, UPMIXTYPE upmixType) {
+  int i;
+  UINT syntaxFlags;
+
+  /* Determine bit stream syntax */
+  syntaxFlags = 0;
+  switch (pSpatialSpecificConfig->coreCodec) {
+    case AOT_ER_AAC_ELD:
+    case AOT_ER_AAC_LD:
+      syntaxFlags |= SACDEC_SYNTAX_LD;
+      break;
+    case AOT_USAC:
+      syntaxFlags |= SACDEC_SYNTAX_USAC;
+      break;
+    case AOT_NONE:
+    default:
+      return MPS_UNSUPPORTED_FORMAT;
+  }
+
+  pSpatialSpecificConfig->syntaxFlags = syntaxFlags;
+
+  switch (pSpatialSpecificConfig->treeConfig) {
+    case TREE_212: {
+      pSpatialSpecificConfig->ottCLDdefault[0] = 0;
+    } break;
+    default:
+      return MPS_INVALID_TREECONFIG;
+  }
+
+  if (syntaxFlags & SACDEC_SYNTAX_USAC) {
+    if (pSpatialSpecificConfig->bsOttBandsPhasePresent) {
+      pSpatialSpecificConfig->numOttBandsIPD =
+          pSpatialSpecificConfig->bsOttBandsPhase;
+    } else {
+      int numParameterBands;
+
+      numParameterBands = pSpatialSpecificConfig->freqRes;
+      switch (numParameterBands) {
+        case 4:
+        case 5:
+          pSpatialSpecificConfig->numOttBandsIPD = 2;
+          break;
+        case 7:
+          pSpatialSpecificConfig->numOttBandsIPD = 3;
+          break;
+        case 10:
+          pSpatialSpecificConfig->numOttBandsIPD = 5;
+          break;
+        case 14:
+          pSpatialSpecificConfig->numOttBandsIPD = 7;
+          break;
+        case 20:
+        case 28:
+          pSpatialSpecificConfig->numOttBandsIPD = 10;
+          break;
+        default:
+          return MPS_INVALID_PARAMETERBANDS;
+      }
+    }
+  } else {
+    pSpatialSpecificConfig->numOttBandsIPD = 0;
+  }
+  for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+    {
+      pSpatialSpecificConfig->bitstreamOttBands[i] =
+          pSpatialSpecificConfig->freqRes;
+    }
+    {
+      pSpatialSpecificConfig->numOttBands[i] =
+          pSpatialSpecificConfig->bitstreamOttBands[i];
+      if (syntaxFlags & SACDEC_SYNTAX_USAC &&
+          !pSpatialSpecificConfig->bsOttBandsPhasePresent) {
+        if (pSpatialSpecificConfig->bResidualCoding &&
+            pSpatialSpecificConfig->ResidualConfig[i].bResidualPresent &&
+            (pSpatialSpecificConfig->numOttBandsIPD <
+             pSpatialSpecificConfig->ResidualConfig[i].nResidualBands)) {
+          pSpatialSpecificConfig->numOttBandsIPD =
+              pSpatialSpecificConfig->ResidualConfig[i].nResidualBands;
+        }
+      }
+    }
+  } /* i */
+
+  return MPS_OK;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecParseExtensionConfig
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+
+static SACDEC_ERROR SpatialDecParseExtensionConfig(
+    HANDLE_FDK_BITSTREAM bitstream, SPATIAL_SPECIFIC_CONFIG *config,
+    int numOttBoxes, int numTttBoxes, int numOutChan, int bitsAvailable) {
+  SACDEC_ERROR err = MPS_OK;
+  INT ba = bitsAvailable;
+
+  config->sacExtCnt = 0;
+  config->bResidualCoding = 0;
+
+  ba = fMin((int)FDKgetValidBits(bitstream), ba);
+
+  while ((ba >= 8) && (config->sacExtCnt < MAX_NUM_EXT_TYPES)) {
+    int bitsRead, nFillBits;
+    INT tmp;
+    UINT sacExtLen;
+
+    config->sacExtType[config->sacExtCnt] = FDKreadBits(bitstream, 4);
+    ba -= 4;
+
+    sacExtLen = FDKreadBits(bitstream, 4);
+    ba -= 4;
+
+    if (sacExtLen == 15) {
+      sacExtLen += FDKreadBits(bitstream, 8);
+      ba -= 8;
+      if (sacExtLen == 15 + 255) {
+        sacExtLen += FDKreadBits(bitstream, 16);
+        ba -= 16;
+      }
+    }
+
+    tmp = (INT)FDKgetValidBits(
+        bitstream); /* Extension config payload start anchor. */
+    if ((tmp <= 0) || (tmp < (INT)sacExtLen * 8) || (ba < (INT)sacExtLen * 8)) {
+      err = MPS_PARSE_ERROR;
+      goto bail;
+    }
+
+    switch (config->sacExtType[config->sacExtCnt]) {
+      default:; /* unknown extension data => do nothing */
+    }
+
+    /* skip remaining extension data */
+    bitsRead = tmp - FDKgetValidBits(bitstream);
+    nFillBits = 8 * sacExtLen - bitsRead;
+
+    if (nFillBits < 0) {
+      err = MPS_PARSE_ERROR;
+      goto bail;
+    } else {
+      /* Skip fill bits or an unkown extension. */
+      FDKpushFor(bitstream, nFillBits);
+    }
+
+    ba -= 8 * sacExtLen;
+    config->sacExtCnt++;
+  }
+
+bail:
+  return err;
+}
+
+SACDEC_ERROR SpatialDecParseSpecificConfigHeader(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, SPATIAL_DEC_UPMIX_TYPE upmixType) {
+  SACDEC_ERROR err = MPS_OK;
+  INT numFillBits;
+  int sacHeaderLen = 0;
+  int sacTimeAlignFlag = 0;
+
+  sacTimeAlignFlag = FDKreadBits(bitstream, 1);
+  sacHeaderLen = FDKreadBits(bitstream, 7);
+
+  if (sacHeaderLen == 127) {
+    sacHeaderLen += FDKreadBits(bitstream, 16);
+  }
+  numFillBits = (INT)FDKgetValidBits(bitstream);
+
+  err = SpatialDecParseSpecificConfig(bitstream, pSpatialSpecificConfig,
+                                      sacHeaderLen, coreCodec);
+
+  numFillBits -=
+      (INT)FDKgetValidBits(bitstream); /* the number of read bits (tmpBits) */
+  numFillBits = (8 * sacHeaderLen) - numFillBits;
+  if (numFillBits < 0) {
+    /* Parsing went wrong */
+    err = MPS_PARSE_ERROR;
+  }
+  /* Move to the very end of the SSC */
+  FDKpushBiDirectional(bitstream, numFillBits);
+
+  if ((err == MPS_OK) && sacTimeAlignFlag) {
+    /* not supported */
+    FDKreadBits(bitstream, 16);
+    err = MPS_UNSUPPORTED_CONFIG;
+  }
+
+  /* Derive additional helper variables */
+  SpatialDecDecodeHelperInfo(pSpatialSpecificConfig, (UPMIXTYPE)upmixType);
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecParseMps212Config(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, int samplingRate,
+    AUDIO_OBJECT_TYPE coreCodec, INT stereoConfigIndex,
+    INT coreSbrFrameLengthIndex) {
+  int i;
+
+  FDKmemclear(pSpatialSpecificConfig, sizeof(SPATIAL_SPECIFIC_CONFIG));
+
+  pSpatialSpecificConfig->stereoConfigIndex = stereoConfigIndex;
+  pSpatialSpecificConfig->coreSbrFrameLengthIndex = coreSbrFrameLengthIndex;
+  pSpatialSpecificConfig->freqRes =
+      (SPATIALDEC_FREQ_RES)freqResTable[FDKreadBits(bitstream, 3)];
+  if (pSpatialSpecificConfig->freqRes == 0) {
+    return MPS_PARSE_ERROR; /* reserved value */
+  }
+
+  switch (coreCodec) {
+    case AOT_DRM_USAC:
+      pSpatialSpecificConfig->bsFixedGainDMX =
+          (SPATIALDEC_FIXED_GAINS)FDKreadBits(bitstream, 3);
+      /* tempShapeConfig = (bsTempShapeConfigDrm == 1) ? 3 : 0 */
+      pSpatialSpecificConfig->tempShapeConfig =
+          (SPATIALDEC_TS_CONF)(FDKreadBits(bitstream, 1) * 3);
+      pSpatialSpecificConfig->decorrConfig = (SPATIALDEC_DECORR_CONF)0;
+      pSpatialSpecificConfig->bsDecorrType = 0;
+      break;
+    case AOT_USAC:
+      pSpatialSpecificConfig->bsFixedGainDMX =
+          (SPATIALDEC_FIXED_GAINS)FDKreadBits(bitstream, 3);
+      pSpatialSpecificConfig->tempShapeConfig =
+          (SPATIALDEC_TS_CONF)FDKreadBits(bitstream, 2);
+      pSpatialSpecificConfig->decorrConfig =
+          (SPATIALDEC_DECORR_CONF)FDKreadBits(bitstream, 2);
+      if (pSpatialSpecificConfig->decorrConfig > 2) {
+        return MPS_PARSE_ERROR; /* reserved value */
+      }
+      pSpatialSpecificConfig->bsDecorrType = 0;
+      break;
+    default:
+      return MPS_UNSUPPORTED_FORMAT;
+  }
+  pSpatialSpecificConfig->nTimeSlots = (coreSbrFrameLengthIndex == 4) ? 64 : 32;
+  pSpatialSpecificConfig->bsHighRateMode = (UCHAR)FDKreadBits(bitstream, 1);
+
+  {
+    pSpatialSpecificConfig->bsPhaseCoding = (UCHAR)FDKreadBits(bitstream, 1);
+    pSpatialSpecificConfig->bsOttBandsPhasePresent =
+        (UCHAR)FDKreadBits(bitstream, 1);
+    if (pSpatialSpecificConfig->bsOttBandsPhasePresent) {
+      if (MAX_PARAMETER_BANDS < (pSpatialSpecificConfig->bsOttBandsPhase =
+                                     FDKreadBits(bitstream, 5))) {
+        return MPS_PARSE_ERROR;
+      }
+    } else {
+      pSpatialSpecificConfig->bsOttBandsPhase = 0;
+    }
+  }
+
+  if (stereoConfigIndex > 1) { /* do residual coding */
+    pSpatialSpecificConfig->bResidualCoding = 1;
+    pSpatialSpecificConfig->ResidualConfig->bResidualPresent = 1;
+    if (pSpatialSpecificConfig->freqRes <
+        (pSpatialSpecificConfig->ResidualConfig->nResidualBands =
+             FDKreadBits(bitstream, 5))) {
+      return MPS_PARSE_ERROR;
+    }
+    pSpatialSpecificConfig->bsOttBandsPhase =
+        fMax(pSpatialSpecificConfig->bsOttBandsPhase,
+             pSpatialSpecificConfig->ResidualConfig->nResidualBands);
+    pSpatialSpecificConfig->bsPseudoLr = (UCHAR)FDKreadBits(bitstream, 1);
+
+    if (pSpatialSpecificConfig->bsPhaseCoding) {
+      pSpatialSpecificConfig->bsPhaseCoding = 3;
+    }
+  } else {
+    pSpatialSpecificConfig->bResidualCoding = 0;
+    pSpatialSpecificConfig->ResidualConfig->bResidualPresent = 0;
+  }
+
+  if (pSpatialSpecificConfig->tempShapeConfig == 2) {
+    switch (coreCodec) {
+      case AOT_USAC:
+        pSpatialSpecificConfig->envQuantMode = FDKreadBits(bitstream, 1);
+        break;
+      default: /* added to avoid compiler warning */
+        break; /* added to avoid compiler warning */
+    }
+  }
+
+  /* Static parameters */
+
+  pSpatialSpecificConfig->samplingFreq =
+      samplingRate; /* wrong for stereoConfigIndex == 3 but value is unused */
+  pSpatialSpecificConfig->treeConfig = SPATIALDEC_MODE_RSVD7;
+  pSpatialSpecificConfig->nOttBoxes =
+      treePropertyTable[pSpatialSpecificConfig->treeConfig].numOttBoxes;
+  pSpatialSpecificConfig->nInputChannels =
+      treePropertyTable[pSpatialSpecificConfig->treeConfig].numInputChannels;
+  pSpatialSpecificConfig->nOutputChannels =
+      treePropertyTable[pSpatialSpecificConfig->treeConfig].numOutputChannels;
+
+  pSpatialSpecificConfig->bArbitraryDownmix = 0;
+
+  for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+    pSpatialSpecificConfig->OttConfig[i].nOttBands = 0;
+  }
+
+  if (coreCodec == AOT_DRM_USAC) {
+    /* MPS payload is MPEG conform -> no need for pseudo DRM AOT */
+    coreCodec = AOT_USAC;
+  }
+  pSpatialSpecificConfig->coreCodec = coreCodec;
+
+  /* Derive additional helper variables */
+  SpatialDecDecodeHelperInfo(pSpatialSpecificConfig, UPMIXTYPE_NORMAL);
+
+  return MPS_OK;
+}
+
+SACDEC_ERROR SpatialDecParseSpecificConfig(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, int sacHeaderLen,
+    AUDIO_OBJECT_TYPE coreCodec) {
+  SACDEC_ERROR err = MPS_OK;
+  int i;
+  int bsSamplingFreqIndex;
+  int bsFreqRes, b3DaudioMode = 0;
+  int numHeaderBits;
+  int cfgStartPos, bitsAvailable;
+
+  FDKmemclear(pSpatialSpecificConfig, sizeof(SPATIAL_SPECIFIC_CONFIG));
+
+  cfgStartPos = FDKgetValidBits(bitstream);
+  /* It might be that we do not know the SSC length beforehand. */
+  if (sacHeaderLen == 0) {
+    bitsAvailable = cfgStartPos;
+  } else {
+    bitsAvailable = 8 * sacHeaderLen;
+    if (bitsAvailable > cfgStartPos) {
+      err = MPS_PARSE_ERROR;
+      goto bail;
+    }
+  }
+
+  bsSamplingFreqIndex = FDKreadBits(bitstream, 4);
+
+  if (bsSamplingFreqIndex == 15) {
+    pSpatialSpecificConfig->samplingFreq = FDKreadBits(bitstream, 24);
+  } else {
+    pSpatialSpecificConfig->samplingFreq =
+        samplingFreqTable[bsSamplingFreqIndex];
+    if (pSpatialSpecificConfig->samplingFreq == 0) {
+      err = MPS_PARSE_ERROR;
+      goto bail;
+    }
+  }
+
+  pSpatialSpecificConfig->nTimeSlots = FDKreadBits(bitstream, 5) + 1;
+  if ((pSpatialSpecificConfig->nTimeSlots < 1) ||
+      (pSpatialSpecificConfig->nTimeSlots > MAX_TIME_SLOTS)) {
+    err = MPS_PARSE_ERROR;
+    goto bail;
+  }
+
+  bsFreqRes = FDKreadBits(bitstream, 3);
+
+  pSpatialSpecificConfig->freqRes =
+      (SPATIALDEC_FREQ_RES)freqResTable_LD[bsFreqRes];
+
+  pSpatialSpecificConfig->treeConfig =
+      (SPATIALDEC_TREE_CONFIG)FDKreadBits(bitstream, 4);
+
+  if (pSpatialSpecificConfig->treeConfig != SPATIALDEC_MODE_RSVD7) {
+    err = MPS_UNSUPPORTED_CONFIG;
+    goto bail;
+  }
+
+  {
+    pSpatialSpecificConfig->nOttBoxes =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numOttBoxes;
+    pSpatialSpecificConfig->nTttBoxes =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numTttBoxes;
+    pSpatialSpecificConfig->nInputChannels =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numInputChannels;
+    pSpatialSpecificConfig->nOutputChannels =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numOutputChannels;
+  }
+
+  pSpatialSpecificConfig->quantMode =
+      (SPATIALDEC_QUANT_MODE)FDKreadBits(bitstream, 2);
+
+  pSpatialSpecificConfig->bArbitraryDownmix = FDKreadBits(bitstream, 1);
+
+  pSpatialSpecificConfig->bsFixedGainDMX =
+      (SPATIALDEC_FIXED_GAINS)FDKreadBits(bitstream, 3);
+
+  pSpatialSpecificConfig->tempShapeConfig =
+      (SPATIALDEC_TS_CONF)FDKreadBits(bitstream, 2);
+  if (pSpatialSpecificConfig->tempShapeConfig > 2) {
+    return MPS_PARSE_ERROR; /* reserved value */
+  }
+
+  pSpatialSpecificConfig->decorrConfig =
+      (SPATIALDEC_DECORR_CONF)FDKreadBits(bitstream, 2);
+  if (pSpatialSpecificConfig->decorrConfig > 2) {
+    return MPS_PARSE_ERROR; /* reserved value */
+  }
+
+  for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+    pSpatialSpecificConfig->OttConfig[i].nOttBands = 0;
+  }
+
+  for (i = 0; i < pSpatialSpecificConfig->nTttBoxes; i++) {
+    int bTttDualMode = FDKreadBits(bitstream, 1);
+    FDKreadBits(bitstream, 3); /* not supported */
+
+    if (bTttDualMode) {
+      FDKreadBits(bitstream, 8); /* not supported */
+    }
+  }
+
+  if (pSpatialSpecificConfig->tempShapeConfig == 2) {
+    pSpatialSpecificConfig->envQuantMode = FDKreadBits(bitstream, 1);
+  }
+
+  if (b3DaudioMode) {
+    if (FDKreadBits(bitstream, 2) == 0) { /* b3DaudioHRTFset ? */
+      int hc;
+      int HRTFnumBand;
+      int HRTFfreqRes = FDKreadBits(bitstream, 3);
+      int HRTFnumChan = FDKreadBits(bitstream, 4);
+      int HRTFasymmetric = FDKreadBits(bitstream, 1);
+
+      HRTFnumBand = freqResTable_LD[HRTFfreqRes];
+
+      for (hc = 0; hc < HRTFnumChan; hc++) {
+        FDKpushFor(bitstream, HRTFnumBand * 6); /* HRTFlevelLeft[hc][hb] */
+        if (HRTFasymmetric) {
+          FDKpushFor(bitstream, HRTFnumBand * 6); /* HRTFlevelRight[hc][hb] */
+        }
+        if (FDKreadBits(bitstream, 1)) {          /* HRTFphase[hc] ? */
+          FDKpushFor(bitstream, HRTFnumBand * 6); /* HRTFphaseLR[hc][hb] */
+        }
+        if (FDKreadBits(bitstream, 1)) {          /* HRTFicc[hc] ? */
+          FDKpushFor(bitstream, HRTFnumBand * 6); /* HRTFiccLR[hc][hb] */
+        }
+      }
+    }
+  }
+
+  FDKbyteAlign(bitstream,
+               cfgStartPos); /* ISO/IEC FDIS 23003-1: 5.2. ... byte alignment
+                                with respect to the beginning of the syntactic
+                                element in which ByteAlign() occurs. */
+
+  numHeaderBits = cfgStartPos - (INT)FDKgetValidBits(bitstream);
+  bitsAvailable -= numHeaderBits;
+  if (bitsAvailable < 0) {
+    err = MPS_PARSE_ERROR;
+    goto bail;
+  }
+
+  pSpatialSpecificConfig->sacExtCnt = 0;
+  pSpatialSpecificConfig->bResidualCoding = 0;
+
+  err = SpatialDecParseExtensionConfig(
+      bitstream, pSpatialSpecificConfig, pSpatialSpecificConfig->nOttBoxes,
+      pSpatialSpecificConfig->nTttBoxes,
+      pSpatialSpecificConfig->nOutputChannels, bitsAvailable);
+
+  FDKbyteAlign(
+      bitstream,
+      cfgStartPos); /* Same alignment anchor as above because
+                       SpatialExtensionConfig() always reads full bytes */
+
+  pSpatialSpecificConfig->coreCodec = coreCodec;
+
+  SpatialDecDecodeHelperInfo(pSpatialSpecificConfig, UPMIXTYPE_NORMAL);
+
+bail:
+  if (sacHeaderLen > 0) {
+    /* If the config is of known length then assure that the
+       bitbuffer is exactly at its end when leaving the function. */
+    FDKpushBiDirectional(
+        bitstream,
+        (sacHeaderLen * 8) - (cfgStartPos - (INT)FDKgetValidBits(bitstream)));
+  }
+
+  return err;
+}
+
+int SpatialDecDefaultSpecificConfig(
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, int samplingFreq, int nTimeSlots,
+    int sacDecoderLevel, int isBlind, int numCoreChannels)
+
+{
+  int err = MPS_OK;
+  int i;
+
+  FDK_ASSERT(coreCodec != AOT_NONE);
+  FDK_ASSERT(nTimeSlots > 0);
+  FDK_ASSERT(samplingFreq > 0);
+
+  pSpatialSpecificConfig->coreCodec = coreCodec;
+  pSpatialSpecificConfig->samplingFreq = samplingFreq;
+  pSpatialSpecificConfig->nTimeSlots = nTimeSlots;
+  if ((pSpatialSpecificConfig->coreCodec == AOT_ER_AAC_ELD) ||
+      (pSpatialSpecificConfig->coreCodec == AOT_ER_AAC_LD))
+    pSpatialSpecificConfig->freqRes = SPATIALDEC_FREQ_RES_23;
+  else
+    pSpatialSpecificConfig->freqRes = SPATIALDEC_FREQ_RES_28;
+
+  {
+    pSpatialSpecificConfig->treeConfig =
+        SPATIALDEC_MODE_RSVD7; /* 212  configuration */
+  }
+
+  {
+    pSpatialSpecificConfig->nOttBoxes =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numOttBoxes;
+    pSpatialSpecificConfig->nInputChannels =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numInputChannels;
+    pSpatialSpecificConfig->nOutputChannels =
+        treePropertyTable[pSpatialSpecificConfig->treeConfig].numOutputChannels;
+  }
+
+  pSpatialSpecificConfig->quantMode = SPATIALDEC_QUANT_FINE_DEF;
+  pSpatialSpecificConfig->bArbitraryDownmix = 0;
+  pSpatialSpecificConfig->bResidualCoding = 0;
+  if ((pSpatialSpecificConfig->coreCodec == AOT_ER_AAC_ELD) ||
+      (pSpatialSpecificConfig->coreCodec == AOT_ER_AAC_LD))
+    pSpatialSpecificConfig->bsFixedGainDMX = SPATIALDEC_GAIN_RSVD2;
+  else
+    pSpatialSpecificConfig->bsFixedGainDMX = SPATIALDEC_GAIN_MODE0;
+
+  pSpatialSpecificConfig->tempShapeConfig = SPATIALDEC_TS_TPNOWHITE;
+  pSpatialSpecificConfig->decorrConfig = SPATIALDEC_DECORR_MODE0;
+
+  for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+    pSpatialSpecificConfig->OttConfig[i].nOttBands = 0;
+  }
+
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: coarse2fine
+ *******************************************************************************
+
+ Description:
+   Parameter index mapping from coarse to fine quantization
+
+ Arguments:
+
+Input:
+
+Output:
+
+*******************************************************************************/
+static void coarse2fine(SCHAR *data, DATA_TYPE dataType, int startBand,
+                        int numBands) {
+  int i;
+
+  for (i = startBand; i < startBand + numBands; i++) {
+    data[i] <<= 1;
+  }
+
+  if (dataType == t_CLD) {
+    for (i = startBand; i < startBand + numBands; i++) {
+      if (data[i] == -14)
+        data[i] = -15;
+      else if (data[i] == 14)
+        data[i] = 15;
+    }
+  }
+}
+
+/*******************************************************************************
+ Functionname: fine2coarse
+ *******************************************************************************
+
+ Description:
+   Parameter index mapping from fine to coarse quantization
+
+ Arguments:
+
+Input:
+
+Output:
+
+*******************************************************************************/
+static void fine2coarse(SCHAR *data, DATA_TYPE dataType, int startBand,
+                        int numBands) {
+  int i;
+
+  for (i = startBand; i < startBand + numBands; i++) {
+    /* Note: the if cases below actually make a difference (negative values) */
+    if (dataType == t_CLD)
+      data[i] /= 2;
+    else
+      data[i] >>= 1;
+  }
+}
+
+/*******************************************************************************
+ Functionname: getStrideMap
+ *******************************************************************************
+
+ Description:
+   Index Mapping accroding to pbStrides
+
+ Arguments:
+
+Input:
+
+Output:
+
+*******************************************************************************/
+static int getStrideMap(int freqResStride, int startBand, int stopBand,
+                        int *aStrides) {
+  int i, pb, pbStride, dataBands, strOffset;
+
+  pbStride = pbStrideTable[freqResStride];
+  dataBands = (stopBand - startBand - 1) / pbStride + 1;
+
+  aStrides[0] = startBand;
+  for (pb = 1; pb <= dataBands; pb++) {
+    aStrides[pb] = aStrides[pb - 1] + pbStride;
+  }
+  strOffset = 0;
+  while (aStrides[dataBands] > stopBand) {
+    if (strOffset < dataBands) strOffset++;
+    for (i = strOffset; i <= dataBands; i++) {
+      aStrides[i]--;
+    }
+  }
+
+  return dataBands;
+}
+
+/*******************************************************************************
+ Functionname: ecDataDec
+ *******************************************************************************
+
+ Description:
+   Do delta decoding and dequantization
+
+ Arguments:
+
+Input:
+
+Output:
+
+
+*******************************************************************************/
+
+static SACDEC_ERROR ecDataDec(
+    const SPATIAL_BS_FRAME *frame, UINT syntaxFlags,
+    HANDLE_FDK_BITSTREAM bitstream, LOSSLESSDATA *const llData,
+    SCHAR (*data)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS], SCHAR **lastdata,
+    int datatype, int boxIdx, int startBand, int stopBand, SCHAR defaultValue) {
+  SACDEC_ERROR err = MPS_OK;
+  int i, j, pb, dataSets, setIdx, bsDataPair, dataBands, oldQuantCoarseXXX;
+  INT aStrides[MAX_PARAMETER_BANDS + 1] = {0};
+
+  dataSets = 0;
+  for (i = 0; i < frame->numParameterSets; i++) {
+    llData->bsXXXDataMode[i] = (SCHAR)FDKreadBits(bitstream, 2);
+
+    if ((frame->bsIndependencyFlag == 1) && (i == 0) &&
+        (llData->bsXXXDataMode[i] == 1 ||
+         llData->bsXXXDataMode[i] == 2)) { /* This check catches bitstreams
+                                              generated by older encoder that
+                                              cause trouble */
+      return MPS_PARSE_ERROR;
+    }
+    if ((i >= frame->numParameterSets - 1) &&
+        (llData->bsXXXDataMode[i] ==
+         2)) { /* The interpolation mode must not be active for the last
+                  parameter set */
+      return MPS_PARSE_ERROR;
+    }
+
+    if (llData->bsXXXDataMode[i] == 3) {
+      dataSets++;
+    }
+  }
+
+  setIdx = 0;
+  bsDataPair = 0;
+  oldQuantCoarseXXX = llData->state->bsQuantCoarseXXXprevParse;
+
+  for (i = 0; i < frame->numParameterSets; i++) {
+    if (llData->bsXXXDataMode[i] == 0) {
+      for (pb = startBand; pb < stopBand; pb++) {
+        lastdata[boxIdx][pb] = defaultValue;
+      }
+
+      oldQuantCoarseXXX = 0;
+    }
+
+    if (llData->bsXXXDataMode[i] == 3) {
+      if (bsDataPair) {
+        bsDataPair = 0;
+      } else {
+        bsDataPair = FDKreadBits(bitstream, 1);
+        llData->bsQuantCoarseXXX[setIdx] = (UCHAR)FDKreadBits(bitstream, 1);
+        llData->bsFreqResStrideXXX[setIdx] = (UCHAR)FDKreadBits(bitstream, 2);
+
+        if (llData->bsQuantCoarseXXX[setIdx] != oldQuantCoarseXXX) {
+          if (oldQuantCoarseXXX) {
+            coarse2fine(lastdata[boxIdx], (DATA_TYPE)datatype, startBand,
+                        stopBand - startBand);
+          } else {
+            fine2coarse(lastdata[boxIdx], (DATA_TYPE)datatype, startBand,
+                        stopBand - startBand);
+          }
+        }
+
+        dataBands = getStrideMap(llData->bsFreqResStrideXXX[setIdx], startBand,
+                                 stopBand, aStrides);
+
+        for (pb = 0; pb < dataBands; pb++) {
+          lastdata[boxIdx][startBand + pb] = lastdata[boxIdx][aStrides[pb]];
+        }
+
+        if (boxIdx > MAX_NUM_OTT) return MPS_INVALID_BOXIDX;
+        if ((setIdx + bsDataPair) > MAX_PARAMETER_SETS)
+          return MPS_INVALID_SETIDX;
+
+        /* DECODER_TYPE defined in FDK_tools */
+        DECODER_TYPE this_decoder_type = SAC_DECODER;
+        if (syntaxFlags & (SACDEC_SYNTAX_USAC | SACDEC_SYNTAX_RSVD50)) {
+          this_decoder_type = USAC_DECODER;
+        } else if (syntaxFlags & SACDEC_SYNTAX_LD) {
+          this_decoder_type = SAOC_DECODER;
+        }
+
+        err = (SACDEC_ERROR)EcDataPairDec(
+            this_decoder_type, bitstream, data[boxIdx][setIdx + 0],
+            data[boxIdx][setIdx + 1], lastdata[boxIdx], (DATA_TYPE)datatype,
+            startBand, dataBands, bsDataPair, llData->bsQuantCoarseXXX[setIdx],
+            !(frame->bsIndependencyFlag && (i == 0)) || (setIdx > 0));
+        if (err != MPS_OK) goto bail;
+
+        if (datatype == t_IPD) {
+          const SCHAR mask = (llData->bsQuantCoarseXXX[setIdx]) ? 7 : 15;
+          for (pb = 0; pb < dataBands; pb++) {
+            for (j = aStrides[pb]; j < aStrides[pb + 1]; j++) {
+              lastdata[boxIdx][j] =
+                  data[boxIdx][setIdx + bsDataPair][startBand + pb] & mask;
+            }
+          }
+        } else {
+          for (pb = 0; pb < dataBands; pb++) {
+            for (j = aStrides[pb]; j < aStrides[pb + 1]; j++) {
+              lastdata[boxIdx][j] =
+                  data[boxIdx][setIdx + bsDataPair][startBand + pb];
+            }
+          }
+        }
+
+        oldQuantCoarseXXX = llData->bsQuantCoarseXXX[setIdx];
+
+        if (bsDataPair) {
+          llData->bsQuantCoarseXXX[setIdx + 1] =
+              llData->bsQuantCoarseXXX[setIdx];
+          llData->bsFreqResStrideXXX[setIdx + 1] =
+              llData->bsFreqResStrideXXX[setIdx];
+        }
+        setIdx += bsDataPair + 1;
+      } /* !bsDataPair */
+    }   /* llData->bsXXXDataMode[i] == 3 */
+  }
+
+  llData->state->bsQuantCoarseXXXprevParse = oldQuantCoarseXXX;
+
+bail:
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: parseArbitraryDownmixData
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static SACDEC_ERROR parseArbitraryDownmixData(
+    spatialDec *self, const SPATIAL_SPECIFIC_CONFIG *pSSC,
+    const UINT syntaxFlags, const SPATIAL_BS_FRAME *frame,
+    HANDLE_FDK_BITSTREAM bitstream) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch;
+  int offset = pSSC->nOttBoxes;
+
+  /* CLD (arbitrary down-mix gains) */
+  for (ch = 0; ch < pSSC->nInputChannels; ch++) {
+    err = ecDataDec(frame, syntaxFlags, bitstream,
+                    &frame->CLDLosslessData[offset + ch],
+                    frame->cmpArbdmxGainIdx, self->cmpArbdmxGainIdxPrev, t_CLD,
+                    ch, 0, pSSC->freqRes, arbdmxGainDefault);
+    if (err != MPS_OK) return err;
+  }
+
+  return err;
+
+} /* parseArbitraryDownmixData */
+
+/*******************************************************************************
+ Functionname: SpatialDecParseFrame
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+
+ Output:
+
+*******************************************************************************/
+
+static int nBitsParamSlot(int i) {
+  int bitsParamSlot;
+
+  bitsParamSlot = fMax(0, DFRACT_BITS - 1 - fNormz((FIXP_DBL)i));
+  if ((1 << bitsParamSlot) < i) {
+    bitsParamSlot++;
+  }
+  FDK_ASSERT((bitsParamSlot >= 0) && (bitsParamSlot <= 32));
+
+  return bitsParamSlot;
+}
+
+SACDEC_ERROR SpatialDecParseFrameData(
+    spatialDec_struct *self, SPATIAL_BS_FRAME *frame,
+    HANDLE_FDK_BITSTREAM bitstream,
+    const SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, UPMIXTYPE upmixType,
+    int fGlobalIndependencyFlag) {
+  SACDEC_ERROR err = MPS_OK;
+  int bsFramingType, dataBands, ps, pg, i;
+  int pb;
+  int numTempShapeChan = 0;
+  int bsNumOutputChannels =
+      treePropertyTable[pSpatialSpecificConfig->treeConfig]
+          .numOutputChannels; /* CAUTION: Maybe different to
+                                 pSpatialSpecificConfig->treeConfig in some
+                                 modes! */
+  int paramSetErr = 0;
+  UINT alignAnchor = FDKgetValidBits(
+      bitstream); /* Anchor for ByteAlign() function. See comment below. */
+  UINT syntaxFlags;
+
+  syntaxFlags = pSpatialSpecificConfig->syntaxFlags;
+
+  if ((syntaxFlags & (SACDEC_SYNTAX_USAC | SACDEC_SYNTAX_RSVD50)) &&
+      pSpatialSpecificConfig->bsHighRateMode == 0) {
+    bsFramingType = 0; /* fixed framing */
+    frame->numParameterSets = 1;
+  } else {
+    bsFramingType = FDKreadBits(bitstream, 1);
+    if (syntaxFlags & SACDEC_SYNTAX_LD)
+      frame->numParameterSets = FDKreadBits(bitstream, 1) + 1;
+    else
+      frame->numParameterSets = FDKreadBits(bitstream, 3) + 1;
+  }
+
+  /* Any error after this line shall trigger parameter invalidation at bail
+   * label. */
+  paramSetErr = 1;
+
+  if (frame->numParameterSets >= MAX_PARAMETER_SETS) {
+    goto bail;
+  }
+
+  /* Basic config check. */
+  if (pSpatialSpecificConfig->nInputChannels <= 0 ||
+      pSpatialSpecificConfig->nOutputChannels <= 0) {
+    err = MPS_UNSUPPORTED_CONFIG;
+    goto bail;
+  }
+
+  if (bsFramingType) {
+    int prevParamSlot = -1;
+    int bitsParamSlot;
+
+    {
+      bitsParamSlot = nBitsParamSlot(pSpatialSpecificConfig->nTimeSlots);
+
+      for (i = 0; i < frame->numParameterSets; i++) {
+        frame->paramSlot[i] = FDKreadBits(bitstream, bitsParamSlot);
+        /* Sanity check */
+        if ((frame->paramSlot[i] <= prevParamSlot) ||
+            (frame->paramSlot[i] >= pSpatialSpecificConfig->nTimeSlots)) {
+          err = MPS_PARSE_ERROR;
+          goto bail;
+        }
+        prevParamSlot = frame->paramSlot[i];
+      }
+    }
+  } else {
+    for (i = 0; i < frame->numParameterSets; i++) {
+      frame->paramSlot[i] = ((pSpatialSpecificConfig->nTimeSlots * (i + 1)) /
+                             frame->numParameterSets) -
+                            1;
+    }
+  }
+
+  if ((syntaxFlags & (SACDEC_SYNTAX_USAC | SACDEC_SYNTAX_RSVD50)) &&
+      fGlobalIndependencyFlag) {
+    frame->bsIndependencyFlag = 1;
+  } else {
+    frame->bsIndependencyFlag = (UCHAR)FDKreadBits(bitstream, 1);
+  }
+
+  /*
+   * OttData()
+   */
+  for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+    err = ecDataDec(frame, syntaxFlags, bitstream, &frame->CLDLosslessData[i],
+                    frame->cmpOttCLDidx, self->cmpOttCLDidxPrev, t_CLD, i, 0,
+                    pSpatialSpecificConfig->bitstreamOttBands[i],
+                    pSpatialSpecificConfig->ottCLDdefault[i]);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+  } /* i < numOttBoxes */
+
+  {
+    for (i = 0; i < pSpatialSpecificConfig->nOttBoxes; i++) {
+      err = ecDataDec(frame, syntaxFlags, bitstream, &frame->ICCLosslessData[i],
+                      frame->cmpOttICCidx, self->cmpOttICCidxPrev, t_ICC, i, 0,
+                      pSpatialSpecificConfig->bitstreamOttBands[i], ICCdefault);
+      if (err != MPS_OK) {
+        goto bail;
+      }
+    } /* i < numOttBoxes */
+  }   /* !oneICC */
+
+  if ((pSpatialSpecificConfig->treeConfig == SPATIALDEC_MODE_RSVD7) &&
+      (pSpatialSpecificConfig->bsPhaseCoding)) {
+    frame->phaseMode = FDKreadBits(bitstream, 1);
+
+    if (frame->phaseMode == 0) {
+      for (pb = 0; pb < pSpatialSpecificConfig->numOttBandsIPD; pb++) {
+        self->cmpOttIPDidxPrev[0][pb] = 0;
+        for (i = 0; i < frame->numParameterSets; i++) {
+          frame->cmpOttIPDidx[0][i][pb] = 0;
+          // frame->ottIPDidx[0][i][pb] = 0;
+        }
+        /* self->ottIPDidxPrev[0][pb] = 0; */
+      }
+      frame->OpdSmoothingMode = 0;
+    } else {
+      frame->OpdSmoothingMode = FDKreadBits(bitstream, 1);
+      err = ecDataDec(frame, syntaxFlags, bitstream, &frame->IPDLosslessData[0],
+                      frame->cmpOttIPDidx, self->cmpOttIPDidxPrev, t_IPD, 0, 0,
+                      pSpatialSpecificConfig->numOttBandsIPD, IPDdefault);
+      if (err != MPS_OK) {
+        goto bail;
+      }
+    }
+  }
+
+  /*
+   * SmgData()
+   */
+
+  {
+    if (!pSpatialSpecificConfig->bsHighRateMode &&
+        (syntaxFlags & SACDEC_SYNTAX_USAC)) {
+      for (ps = 0; ps < frame->numParameterSets; ps++) {
+        frame->bsSmoothMode[ps] = 0;
+      }
+    } else {
+      for (ps = 0; ps < frame->numParameterSets; ps++) {
+        frame->bsSmoothMode[ps] = (UCHAR)FDKreadBits(bitstream, 2);
+        if (frame->bsSmoothMode[ps] >= 2) {
+          frame->bsSmoothTime[ps] = (UCHAR)FDKreadBits(bitstream, 2);
+        }
+        if (frame->bsSmoothMode[ps] == 3) {
+          frame->bsFreqResStrideSmg[ps] = (UCHAR)FDKreadBits(bitstream, 2);
+          dataBands = (pSpatialSpecificConfig->freqRes - 1) /
+                          pbStrideTable[frame->bsFreqResStrideSmg[ps]] +
+                      1;
+          for (pg = 0; pg < dataBands; pg++) {
+            frame->bsSmgData[ps][pg] = (UCHAR)FDKreadBits(bitstream, 1);
+          }
+        }
+      } /* ps < numParameterSets */
+    }
+  }
+
+  /*
+   * TempShapeData()
+   */
+  if ((pSpatialSpecificConfig->tempShapeConfig == 3) &&
+      (syntaxFlags & SACDEC_SYNTAX_USAC)) {
+    int TsdErr;
+    TsdErr = TsdRead(bitstream, pSpatialSpecificConfig->nTimeSlots,
+                     &frame->TsdData[0]);
+    if (TsdErr) {
+      err = MPS_PARSE_ERROR;
+      goto bail;
+    }
+  } else {
+    frame->TsdData[0].bsTsdEnable = 0;
+  }
+
+  for (i = 0; i < bsNumOutputChannels; i++) {
+    frame->tempShapeEnableChannelSTP[i] = 0;
+    frame->tempShapeEnableChannelGES[i] = 0;
+  }
+
+  if ((pSpatialSpecificConfig->tempShapeConfig == 1) ||
+      (pSpatialSpecificConfig->tempShapeConfig == 2)) {
+    int bsTempShapeEnable = FDKreadBits(bitstream, 1);
+    if (bsTempShapeEnable) {
+      numTempShapeChan =
+          tempShapeChanTable[pSpatialSpecificConfig->tempShapeConfig - 1]
+                            [pSpatialSpecificConfig->treeConfig];
+      switch (pSpatialSpecificConfig->tempShapeConfig) {
+        case 1: /* STP */
+          for (i = 0; i < numTempShapeChan; i++) {
+            int stpEnable = FDKreadBits(bitstream, 1);
+            frame->tempShapeEnableChannelSTP[i] = stpEnable;
+          }
+          break;
+        case 2: /* GES */
+        {
+          UCHAR gesChannelEnable[MAX_OUTPUT_CHANNELS];
+
+          for (i = 0; i < numTempShapeChan; i++) {
+            gesChannelEnable[i] = (UCHAR)FDKreadBits(bitstream, 1);
+            frame->tempShapeEnableChannelGES[i] = gesChannelEnable[i];
+          }
+          for (i = 0; i < numTempShapeChan; i++) {
+            if (gesChannelEnable[i]) {
+              int envShapeData_tmp[MAX_TIME_SLOTS];
+              if (huff_dec_reshape(bitstream, envShapeData_tmp,
+                                   pSpatialSpecificConfig->nTimeSlots) != 0) {
+                err = MPS_PARSE_ERROR;
+                goto bail;
+              }
+              for (int ts = 0; ts < pSpatialSpecificConfig->nTimeSlots; ts++) {
+                if (!(envShapeData_tmp[ts] >= 0) &&
+                    (envShapeData_tmp[ts] <= 4)) {
+                  err = MPS_PARSE_ERROR;
+                  goto bail;
+                }
+                frame->bsEnvShapeData[i][ts] = (UCHAR)envShapeData_tmp[ts];
+              }
+            }
+          }
+        } break;
+        default:
+          err = MPS_INVALID_TEMPSHAPE;
+          goto bail;
+      }
+    } /* bsTempShapeEnable */
+  }   /* pSpatialSpecificConfig->tempShapeConfig != 0 */
+
+  if (pSpatialSpecificConfig->bArbitraryDownmix != 0) {
+    err = parseArbitraryDownmixData(self, pSpatialSpecificConfig, syntaxFlags,
+                                    frame, bitstream);
+    if (err != MPS_OK) goto bail;
+  }
+
+  if (1 && (!(syntaxFlags & (SACDEC_SYNTAX_USAC)))) {
+    FDKbyteAlign(bitstream,
+                 alignAnchor); /* ISO/IEC FDIS 23003-1: 5.2. ... byte alignment
+                                  with respect to the beginning of the syntactic
+                                  element in which ByteAlign() occurs. */
+  }
+
+bail:
+  if (err != MPS_OK && paramSetErr != 0) {
+    /* Since the parameter set data has already been written to the instance we
+     * need to ... */
+    frame->numParameterSets = 0; /* ... signal that it is corrupt ... */
+  }
+
+  return err;
+
+} /* SpatialDecParseFrame */
+
+/*******************************************************************************
+ Functionname: createMapping
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void createMapping(int aMap[MAX_PARAMETER_BANDS + 1], int startBand,
+                          int stopBand, int stride) {
+  int inBands, outBands, bandsAchived, bandsDiff, incr, k, i;
+  int vDk[MAX_PARAMETER_BANDS + 1];
+  inBands = stopBand - startBand;
+  outBands = (inBands - 1) / stride + 1;
+
+  if (outBands < 1) {
+    outBands = 1;
+  }
+
+  bandsAchived = outBands * stride;
+  bandsDiff = inBands - bandsAchived;
+  for (i = 0; i < outBands; i++) {
+    vDk[i] = stride;
+  }
+
+  if (bandsDiff > 0) {
+    incr = -1;
+    k = outBands - 1;
+  } else {
+    incr = 1;
+    k = 0;
+  }
+
+  while (bandsDiff != 0) {
+    vDk[k] = vDk[k] - incr;
+    k = k + incr;
+    bandsDiff = bandsDiff + incr;
+    if (k >= outBands) {
+      if (bandsDiff > 0) {
+        k = outBands - 1;
+      } else if (bandsDiff < 0) {
+        k = 0;
+      }
+    }
+  }
+  aMap[0] = startBand;
+  for (i = 0; i < outBands; i++) {
+    aMap[i + 1] = aMap[i] + vDk[i];
+  }
+} /* createMapping */
+
+/*******************************************************************************
+ Functionname: mapFrequency
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void mapFrequency(const SCHAR *pInput, /* Input */
+                         SCHAR *pOutput,      /* Output */
+                         int *pMap,           /* Mapping function */
+                         int dataBands)       /* Number of data Bands */
+{
+  int i, j;
+  int startBand0 = pMap[0];
+
+  for (i = 0; i < dataBands; i++) {
+    int startBand, stopBand, value;
+
+    value = pInput[i + startBand0];
+
+    startBand = pMap[i];
+    stopBand = pMap[i + 1];
+    for (j = startBand; j < stopBand; j++) {
+      pOutput[j] = value;
+    }
+  }
+}
+
+/*******************************************************************************
+ Functionname: deq
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static int deqIdx(int value, int paramType) {
+  int idx = -1;
+
+  switch (paramType) {
+    case t_CLD:
+      if (((value + 15) >= 0) && ((value + 15) < 31)) {
+        idx = (value + 15);
+      }
+      break;
+
+    case t_ICC:
+      if ((value >= 0) && (value < 8)) {
+        idx = value;
+      }
+      break;
+
+    case t_IPD:
+      /* (+/-)15 * MAX_PARAMETER_BANDS for differential coding in frequency
+       * domain (according to rbl) */
+      if ((value >= -420) && (value <= 420)) {
+        idx = (value & 0xf);
+      }
+      break;
+
+    default:
+      FDK_ASSERT(0);
+  }
+
+  return idx;
+}
+
+  /*******************************************************************************
+   Functionname: factorFunct
+   *******************************************************************************
+
+   Description:
+
+   Arguments:
+
+   Return:
+
+  *******************************************************************************/
+
+#define SF_IDX (7)
+#define SF_FACTOR (3)
+#define SCALE_FACTOR (1 << SF_FACTOR)
+#define SCALE_CLD_C1C2 (1 << SF_CLD_C1C2)
+
+static FIXP_DBL factorFunct(FIXP_DBL ottVsTotDb, INT quantMode) {
+  FIXP_DBL factor;
+
+  if (ottVsTotDb > FL2FXCONST_DBL(0.0)) {
+    ottVsTotDb = FL2FXCONST_DBL(0.0);
+  }
+
+  ottVsTotDb = -ottVsTotDb;
+
+  switch (quantMode) {
+    case 0:
+      factor = FL2FXCONST_DBL(1.0f / SCALE_FACTOR);
+      break;
+    case 1:
+      if (ottVsTotDb >= FL2FXCONST_DBL(21.0f / SCALE_CLD_C1C2))
+        factor = FL2FXCONST_DBL(5.0f / SCALE_FACTOR);
+      else if (ottVsTotDb <= FL2FXCONST_DBL(1.0f / SCALE_CLD_C1C2))
+        factor = FL2FXCONST_DBL(1.0f / SCALE_FACTOR);
+      else
+        factor = (fMult(FL2FXCONST_DBL(0.2f), ottVsTotDb) +
+                  FL2FXCONST_DBL(0.8f / SCALE_CLD_C1C2))
+                 << (SF_CLD_C1C2 - SF_FACTOR);
+      break;
+    case 2:
+      if (ottVsTotDb >= FL2FXCONST_DBL(25.0f / SCALE_CLD_C1C2)) {
+        FDK_ASSERT(SF_FACTOR == 3);
+        factor = (FIXP_DBL)
+            MAXVAL_DBL; /* avoid warning: FL2FXCONST_DBL(8.0f/SCALE_FACTOR) */
+      } else if (ottVsTotDb <= FL2FXCONST_DBL(1.0f / SCALE_CLD_C1C2))
+        factor = FL2FXCONST_DBL(1.0f / SCALE_FACTOR);
+      else
+        factor = (fMult(FL2FXCONST_DBL(7.0f / 24.0f), ottVsTotDb) +
+                  FL2FXCONST_DBL((17.0f / 24.0f) / SCALE_CLD_C1C2))
+                 << (SF_CLD_C1C2 - SF_FACTOR);
+      break;
+    default:
+      factor = FL2FXCONST_DBL(0.0f);
+  }
+
+  return (factor);
+}
+
+/*******************************************************************************
+ Functionname: factorCLD
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void factorCLD(SCHAR *idx, FIXP_DBL ottVsTotDb, FIXP_DBL *ottVsTotDb1,
+                      FIXP_DBL *ottVsTotDb2, SCHAR ottVsTotDbMode,
+                      INT quantMode) {
+  FIXP_DBL factor;
+  FIXP_DBL cldIdxFract;
+  INT cldIdx;
+
+  factor = factorFunct(ottVsTotDb, quantMode);
+
+  cldIdxFract =
+      fMult((FIXP_DBL)((*idx) << ((DFRACT_BITS - 1) - SF_IDX)), factor);
+  cldIdxFract += FL2FXCONST_DBL(15.5f / (1 << (SF_FACTOR + SF_IDX)));
+  cldIdx = fixp_truncateToInt(cldIdxFract, SF_FACTOR + SF_IDX);
+
+  cldIdx = fMin(cldIdx, 30);
+  cldIdx = fMax(cldIdx, 0);
+
+  *idx = cldIdx - 15;
+
+  if (ottVsTotDbMode & ottVsTotDb1Activ)
+    (*ottVsTotDb1) = ottVsTotDb + dequantCLD_c1[cldIdx];
+
+  if (ottVsTotDbMode & ottVsTotDb2Activ)
+    (*ottVsTotDb2) = ottVsTotDb + dequantCLD_c1[30 - cldIdx];
+}
+
+/*******************************************************************************
+ Functionname: mapIndexData
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static SACDEC_ERROR mapIndexData(
+    LOSSLESSDATA *llData, SCHAR ***outputDataIdx, SCHAR ***outputIdxData,
+    const SCHAR (*cmpIdxData)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS],
+    SCHAR ***diffIdxData, SCHAR xttIdx, SCHAR **idxPrev, int paramIdx,
+    int paramType, int startBand, int stopBand, SCHAR defaultValue,
+    int numParameterSets, const int *paramSlot, int extendFrame, int quantMode,
+    SpatialDecConcealmentInfo *concealmentInfo, SCHAR ottVsTotDbMode,
+    FIXP_DBL (*pOttVsTotDbIn)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS],
+    FIXP_DBL (*pOttVsTotDb1)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS],
+    FIXP_DBL (*pOttVsTotDb2)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS]) {
+  int aParamSlots[MAX_PARAMETER_SETS];
+  int aInterpolate[MAX_PARAMETER_SETS];
+
+  int dataSets;
+  int aMap[MAX_PARAMETER_BANDS + 1];
+
+  int setIdx, i, band, parmSlot;
+  int dataBands;
+  int ps, pb;
+  int i1;
+
+  if (numParameterSets > MAX_PARAMETER_SETS) return MPS_WRONG_PARAMETERSETS;
+
+  dataSets = 0;
+  for (i = 0; i < numParameterSets; i++) {
+    if (llData->bsXXXDataMode[i] == 3) {
+      aParamSlots[dataSets] = i;
+      dataSets++;
+    }
+  }
+
+  setIdx = 0;
+
+  /* Main concealment stage is here: */
+  SpatialDecConcealment_Apply(
+      concealmentInfo, cmpIdxData[xttIdx],
+      (diffIdxData != NULL) ? diffIdxData[xttIdx] : NULL, idxPrev[xttIdx],
+      llData->bsXXXDataMode, startBand, stopBand, defaultValue, paramType,
+      numParameterSets);
+
+  /* Prepare data */
+  for (i = 0; i < numParameterSets; i++) {
+    if (llData->bsXXXDataMode[i] == 0) {
+      llData->nocmpQuantCoarseXXX[i] = 0;
+      for (band = startBand; band < stopBand; band++) {
+        outputIdxData[xttIdx][i][band] = defaultValue;
+      }
+      for (band = startBand; band < stopBand; band++) {
+        idxPrev[xttIdx][band] = outputIdxData[xttIdx][i][band];
+      }
+      /* Because the idxPrev are also set to the defaultValue -> signalize fine
+       */
+      llData->state->bsQuantCoarseXXXprev = 0;
+    }
+
+    if (llData->bsXXXDataMode[i] == 1) {
+      for (band = startBand; band < stopBand; band++) {
+        outputIdxData[xttIdx][i][band] = idxPrev[xttIdx][band];
+      }
+      llData->nocmpQuantCoarseXXX[i] = llData->state->bsQuantCoarseXXXprev;
+    }
+
+    if (llData->bsXXXDataMode[i] == 2) {
+      for (band = startBand; band < stopBand; band++) {
+        outputIdxData[xttIdx][i][band] = idxPrev[xttIdx][band];
+      }
+      llData->nocmpQuantCoarseXXX[i] = llData->state->bsQuantCoarseXXXprev;
+      aInterpolate[i] = 1;
+    } else {
+      aInterpolate[i] = 0;
+    }
+
+    if (llData->bsXXXDataMode[i] == 3) {
+      int stride;
+
+      parmSlot = aParamSlots[setIdx];
+      stride = pbStrideTable[llData->bsFreqResStrideXXX[setIdx]];
+      dataBands = (stopBand - startBand - 1) / stride + 1;
+      createMapping(aMap, startBand, stopBand, stride);
+      mapFrequency(&cmpIdxData[xttIdx][setIdx][0],
+                   &outputIdxData[xttIdx][parmSlot][0], aMap, dataBands);
+      for (band = startBand; band < stopBand; band++) {
+        idxPrev[xttIdx][band] = outputIdxData[xttIdx][parmSlot][band];
+      }
+      llData->state->bsQuantCoarseXXXprev = llData->bsQuantCoarseXXX[setIdx];
+      llData->nocmpQuantCoarseXXX[i] = llData->bsQuantCoarseXXX[setIdx];
+
+      setIdx++;
+    }
+    if (diffIdxData != NULL) {
+      for (band = startBand; band < stopBand; band++) {
+        outputIdxData[xttIdx][i][band] += diffIdxData[xttIdx][i][band];
+      }
+    }
+  } /* for( i = 0 ; i < numParameterSets; i++ ) */
+
+  /* Map all coarse data to fine */
+  for (i = 0; i < numParameterSets; i++) {
+    if (llData->nocmpQuantCoarseXXX[i] == 1) {
+      coarse2fine(outputIdxData[xttIdx][i], (DATA_TYPE)paramType, startBand,
+                  stopBand - startBand);
+      llData->nocmpQuantCoarseXXX[i] = 0;
+    }
+  }
+
+  /* Interpolate */
+  i1 = 0;
+  for (i = 0; i < numParameterSets; i++) {
+    int xi, i2, x1, x2;
+
+    if (aInterpolate[i] != 1) {
+      i1 = i;
+    }
+    i2 = i;
+    while (aInterpolate[i2] == 1) {
+      i2++;
+    }
+    x1 = paramSlot[i1];
+    xi = paramSlot[i];
+    x2 = paramSlot[i2];
+
+    if (aInterpolate[i] == 1) {
+      if (i2 >= numParameterSets) return MPS_WRONG_PARAMETERSETS;
+      for (band = startBand; band < stopBand; band++) {
+        int yi, y1, y2;
+        y1 = outputIdxData[xttIdx][i1][band];
+        y2 = outputIdxData[xttIdx][i2][band];
+        if (x1 != x2) {
+          yi = y1 + (xi - x1) * (y2 - y1) / (x2 - x1);
+        } else {
+          yi = y1 /*+ (xi-x1)*(y2-y1)/1e-12*/;
+        }
+        outputIdxData[xttIdx][i][band] = yi;
+      }
+    }
+  } /* for( i = 0 ; i < numParameterSets; i++ ) */
+
+  /* Dequantize data and apply factorCLD if necessary */
+  for (ps = 0; ps < numParameterSets; ps++) {
+    if (quantMode && (paramType == t_CLD)) {
+      if (pOttVsTotDbIn == 0) return MPS_WRONG_OTT;
+      if ((pOttVsTotDb1 == 0) && (ottVsTotDbMode == ottVsTotDb1Activ))
+        return MPS_WRONG_OTT;
+      if ((pOttVsTotDb2 == 0) && (ottVsTotDbMode == ottVsTotDb2Activ))
+        return MPS_WRONG_OTT;
+
+      for (pb = startBand; pb < stopBand; pb++) {
+        factorCLD(&(outputIdxData[xttIdx][ps][pb]), (*pOttVsTotDbIn)[ps][pb],
+                  (pOttVsTotDb1 != NULL) ? &((*pOttVsTotDb1)[ps][pb]) : NULL,
+                  (pOttVsTotDb2 != NULL) ? &((*pOttVsTotDb2)[ps][pb]) : NULL,
+                  ottVsTotDbMode, quantMode);
+      }
+    }
+
+    /* Dequantize data */
+    for (band = startBand; band < stopBand; band++) {
+      outputDataIdx[xttIdx][ps][band] =
+          deqIdx(outputIdxData[xttIdx][ps][band], paramType);
+      if (outputDataIdx[xttIdx][ps][band] == -1) {
+        outputDataIdx[xttIdx][ps][band] = defaultValue;
+      }
+    }
+  } /* for( i = 0 ; i < numParameterSets; i++ ) */
+
+  if (extendFrame) {
+    for (band = startBand; band < stopBand; band++) {
+      outputDataIdx[xttIdx][numParameterSets][band] =
+          outputDataIdx[xttIdx][numParameterSets - 1][band];
+    }
+  }
+
+  return MPS_OK;
+}
+
+/*******************************************************************************
+ Functionname: decodeAndMapFrameOtt
+ *******************************************************************************
+
+ Description:
+   Do delta decoding and dequantization
+
+ Arguments:
+
+Input:
+
+Output:
+
+*******************************************************************************/
+static SACDEC_ERROR decodeAndMapFrameOtt(HANDLE_SPATIAL_DEC self,
+                                         SPATIAL_BS_FRAME *pCurBs) {
+  int i, ottIdx;
+  int numOttBoxes;
+
+  SACDEC_ERROR err = MPS_OK;
+
+  numOttBoxes = self->numOttBoxes;
+
+  switch (self->treeConfig) {
+    default: {
+      if (self->quantMode != 0) {
+        goto bail;
+      }
+    }
+      for (i = 0; i < numOttBoxes; i++) {
+        err = mapIndexData(
+            &pCurBs->CLDLosslessData[i], /* LOSSLESSDATA *llData,*/
+            self->ottCLD__FDK, self->outIdxData,
+            pCurBs
+                ->cmpOttCLDidx, /* int
+                                   cmpIdxData[MAX_NUM_OTT][MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS],
+                                 */
+            NULL,               /* no differential data */
+            i, /*  int   xttIdx,  Which ott/ttt index to use for input and
+                  output buffers */
+            self->ottCLDidxPrev,                        /* int
+                                                           idxPrev[MAX_NUM_OTT][MAX_PARAMETER_BANDS],
+                                                         */
+            i, t_CLD, 0,                                /* int   startBand, */
+            self->pConfigCurrent->bitstreamOttBands[i], /*  int   stopBand, */
+            self->pConfigCurrent->ottCLDdefault[i], /* int   defaultValue, */
+            pCurBs->numParameterSets, /* int   numParameterSets) */
+            pCurBs->paramSlot, self->extendFrame, self->quantMode,
+            &(self->concealInfo), ottVsTotInactiv, NULL, NULL, NULL);
+        if (err != MPS_OK) goto bail;
+
+      } /* for(i = 0; i < numOttBoxes ; i++ ) */
+      break;
+  } /* case */
+
+  for (ottIdx = 0; ottIdx < numOttBoxes; ottIdx++) {
+    /* Read ICC */
+    err = mapIndexData(
+        &pCurBs->ICCLosslessData[ottIdx], /* LOSSLESSDATA *llData,*/
+        self->ottICC__FDK, self->outIdxData,
+        pCurBs
+            ->cmpOttICCidx,  /* int
+                                cmpIdxData[MAX_NUM_OTT][MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS],
+                              */
+        self->ottICCdiffidx, /* differential data */
+        ottIdx, /* int   xttIdx,  Which ott/ttt index to use for input and
+                   output buffers */
+        self->ottICCidxPrev, /* int   idxPrev[MAX_NUM_OTT][MAX_PARAMETER_BANDS],
+                              */
+        ottIdx, t_ICC, 0,    /* int   startBand, */
+        self->pConfigCurrent->bitstreamOttBands[ottIdx], /* int   stopBand, */
+        ICCdefault,               /* int   defaultValue, */
+        pCurBs->numParameterSets, /* int   numParameterSets) */
+        pCurBs->paramSlot, self->extendFrame, self->quantMode,
+        &(self->concealInfo), ottVsTotInactiv, NULL, NULL, NULL);
+    if (err != MPS_OK) goto bail;
+  } /* ottIdx */
+
+  if ((self->treeConfig == TREE_212) && (self->phaseCoding)) {
+    if (pCurBs->phaseMode == 0) {
+      for (int pb = 0; pb < self->pConfigCurrent->numOttBandsIPD; pb++) {
+        self->ottIPDidxPrev[0][pb] = 0;
+      }
+    }
+    for (ottIdx = 0; ottIdx < numOttBoxes; ottIdx++) {
+      err = mapIndexData(
+          &pCurBs->IPDLosslessData[ottIdx], self->ottIPD__FDK, self->outIdxData,
+          pCurBs->cmpOttIPDidx, NULL, ottIdx, self->ottIPDidxPrev, ottIdx,
+          t_IPD, 0, self->numOttBandsIPD, IPDdefault, pCurBs->numParameterSets,
+          pCurBs->paramSlot, self->extendFrame, self->quantMode,
+          &(self->concealInfo), ottVsTotInactiv, NULL, NULL, NULL);
+    }
+  }
+
+bail:
+
+  return MPS_OK;
+
+} /* decodeAndMapFrameOtt */
+
+/*******************************************************************************
+ Functionname: decodeAndMapFrameSmg
+ *******************************************************************************
+
+ Description:
+   Decode smoothing flags
+
+ Arguments:
+
+Input:
+
+Output:
+
+
+*******************************************************************************/
+static SACDEC_ERROR decodeAndMapFrameSmg(HANDLE_SPATIAL_DEC self,
+                                         const SPATIAL_BS_FRAME *frame) {
+  int ps, pb, pg, pbStride, dataBands, pbStart, pbStop,
+      aGroupToBand[MAX_PARAMETER_BANDS + 1];
+
+  if (frame->numParameterSets > MAX_PARAMETER_SETS)
+    return MPS_WRONG_PARAMETERSETS;
+  if (self->bitstreamParameterBands > MAX_PARAMETER_BANDS)
+    return MPS_WRONG_PARAMETERBANDS;
+
+  for (ps = 0; ps < frame->numParameterSets; ps++) {
+    switch (frame->bsSmoothMode[ps]) {
+      case 0:
+        self->smgTime[ps] = 256;
+        FDKmemclear(self->smgData[ps],
+                    self->bitstreamParameterBands * sizeof(UCHAR));
+        break;
+
+      case 1:
+        if (ps > 0) {
+          self->smgTime[ps] = self->smgTime[ps - 1];
+          FDKmemcpy(self->smgData[ps], self->smgData[ps - 1],
+                    self->bitstreamParameterBands * sizeof(UCHAR));
+        } else {
+          self->smgTime[ps] = self->smoothState->prevSmgTime;
+          FDKmemcpy(self->smgData[ps], self->smoothState->prevSmgData,
+                    self->bitstreamParameterBands * sizeof(UCHAR));
+        }
+        break;
+
+      case 2:
+        self->smgTime[ps] = smgTimeTable[frame->bsSmoothTime[ps]];
+        for (pb = 0; pb < self->bitstreamParameterBands; pb++) {
+          self->smgData[ps][pb] = 1;
+        }
+        break;
+
+      case 3:
+        self->smgTime[ps] = smgTimeTable[frame->bsSmoothTime[ps]];
+        pbStride = pbStrideTable[frame->bsFreqResStrideSmg[ps]];
+        dataBands = (self->bitstreamParameterBands - 1) / pbStride + 1;
+        createMapping(aGroupToBand, 0, self->bitstreamParameterBands, pbStride);
+        for (pg = 0; pg < dataBands; pg++) {
+          pbStart = aGroupToBand[pg];
+          pbStop = aGroupToBand[pg + 1];
+          for (pb = pbStart; pb < pbStop; pb++) {
+            self->smgData[ps][pb] = frame->bsSmgData[ps][pg];
+          }
+        }
+        break;
+    }
+  }
+
+  self->smoothState->prevSmgTime = self->smgTime[frame->numParameterSets - 1];
+  FDKmemcpy(self->smoothState->prevSmgData,
+            self->smgData[frame->numParameterSets - 1],
+            self->bitstreamParameterBands * sizeof(UCHAR));
+
+  if (self->extendFrame) {
+    self->smgTime[frame->numParameterSets] =
+        self->smgTime[frame->numParameterSets - 1];
+    FDKmemcpy(self->smgData[frame->numParameterSets],
+              self->smgData[frame->numParameterSets - 1],
+              self->bitstreamParameterBands * sizeof(UCHAR));
+  }
+
+  return MPS_OK;
+}
+
+/*******************************************************************************
+ Functionname: decodeAndMapFrameArbdmx
+ *******************************************************************************
+
+ Description:
+   Do delta decoding and dequantization
+
+ Arguments:
+
+Input:
+
+Output:
+
+*******************************************************************************/
+static SACDEC_ERROR decodeAndMapFrameArbdmx(HANDLE_SPATIAL_DEC self,
+                                            const SPATIAL_BS_FRAME *frame) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch;
+  int offset = self->numOttBoxes;
+
+  for (ch = 0; ch < self->numInputChannels; ch++) {
+    err = mapIndexData(&frame->CLDLosslessData[offset + ch],
+                       self->arbdmxGain__FDK, self->outIdxData,
+                       frame->cmpArbdmxGainIdx, NULL, /* no differential data */
+                       ch, self->arbdmxGainIdxPrev, offset + ch, t_CLD, 0,
+                       self->bitstreamParameterBands,
+                       0 /*self->arbdmxGainDefault*/, frame->numParameterSets,
+                       frame->paramSlot, self->extendFrame, 0,
+                       &(self->concealInfo), ottVsTotInactiv, NULL, NULL, NULL);
+    if (err != MPS_OK) goto bail;
+  }
+
+bail:
+  return err;
+} /* decodeAndMapFrameArbdmx */
+
+/*******************************************************************************
+ Functionname: SpatialDecDecodeFrame
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+SACDEC_ERROR SpatialDecDecodeFrame(spatialDec *self, SPATIAL_BS_FRAME *frame) {
+  SACDEC_ERROR err = MPS_OK;
+
+  self->extendFrame = 0;
+  if (frame->paramSlot[frame->numParameterSets - 1] != self->timeSlots - 1) {
+    self->extendFrame = 1;
+  }
+
+  self->TsdTs = 0;
+
+  /****** DTDF and MAP DATA ********/
+  if ((err = decodeAndMapFrameOtt(self, frame)) != MPS_OK) goto bail;
+
+  if ((err = decodeAndMapFrameSmg(self, frame)) != MPS_OK) goto bail;
+
+  if (self->arbitraryDownmix != 0) {
+    if ((err = decodeAndMapFrameArbdmx(self, frame)) != MPS_OK) goto bail;
+  }
+
+  if (self->extendFrame) {
+    frame->numParameterSets =
+        fixMin(MAX_PARAMETER_SETS, frame->numParameterSets + 1);
+    frame->paramSlot[frame->numParameterSets - 1] = self->timeSlots - 1;
+
+    for (int p = 0; p < frame->numParameterSets; p++) {
+      if (frame->paramSlot[p] > self->timeSlots - 1) {
+        frame->paramSlot[p] = self->timeSlots - 1;
+        err = MPS_PARSE_ERROR;
+      }
+    }
+    if (err != MPS_OK) {
+      goto bail;
+    }
+  }
+
+bail:
+  return err;
+} /* SpatialDecDecodeFrame() */
+
+/*******************************************************************************
+ Functionname: SpatialDecodeHeader
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+
+SACDEC_ERROR SpatialDecDecodeHeader(
+    spatialDec *self, SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig) {
+  SACDEC_ERROR err = MPS_OK;
+  int i;
+
+  self->samplingFreq = pSpatialSpecificConfig->samplingFreq;
+  self->timeSlots = pSpatialSpecificConfig->nTimeSlots;
+  self->frameLength = self->timeSlots * self->qmfBands;
+  self->bitstreamParameterBands = pSpatialSpecificConfig->freqRes;
+
+  if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD)
+    self->hybridBands = self->qmfBands;
+  else
+    self->hybridBands = SacGetHybridSubbands(self->qmfBands);
+  self->tp_hybBandBorder = 12;
+
+  self->numParameterBands = self->bitstreamParameterBands;
+
+  if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD) {
+    switch (self->numParameterBands) {
+      case 4:
+        self->kernels = kernels_4_to_64;
+        break;
+      case 5:
+        self->kernels = kernels_5_to_64;
+        break;
+      case 7:
+        self->kernels = kernels_7_to_64;
+        break;
+      case 9:
+        self->kernels = kernels_9_to_64;
+        break;
+      case 12:
+        self->kernels = kernels_12_to_64;
+        break;
+      case 15:
+        self->kernels = kernels_15_to_64;
+        break;
+      case 23:
+        self->kernels = kernels_23_to_64;
+        break;
+      default:
+        return MPS_INVALID_PARAMETERBANDS; /* unsupported numParameterBands */
+    }
+  } else {
+    switch (self->numParameterBands) {
+      case 4:
+        self->kernels = kernels_4_to_71;
+        break;
+      case 5:
+        self->kernels = kernels_5_to_71;
+        break;
+      case 7:
+        self->kernels = kernels_7_to_71;
+        break;
+      case 10:
+        self->kernels = kernels_10_to_71;
+        break;
+      case 14:
+        self->kernels = kernels_14_to_71;
+        break;
+      case 20:
+        self->kernels = kernels_20_to_71;
+        break;
+      case 28:
+        self->kernels = kernels_28_to_71;
+        break;
+      default:
+        return MPS_INVALID_PARAMETERBANDS; /* unsupported numParameterBands */
+    }
+  }
+
+  /* create param to hyb band table */
+  FDKmemclear(self->param2hyb, (MAX_PARAMETER_BANDS + 1) * sizeof(int));
+  for (i = 0; i < self->hybridBands; i++) {
+    self->param2hyb[self->kernels[i] + 1] = i + 1;
+  }
+  {
+    int pb = self->kernels[i - 1] + 2;
+    for (; pb < (MAX_PARAMETER_BANDS + 1); pb++) {
+      self->param2hyb[pb] = i;
+    }
+    for (pb = 0; pb < MAX_PARAMETER_BANDS; pb += 1) {
+      self->kernels_width[pb] = self->param2hyb[pb + 1] - self->param2hyb[pb];
+    }
+  }
+
+  self->treeConfig = pSpatialSpecificConfig->treeConfig;
+
+  self->numOttBoxes = pSpatialSpecificConfig->nOttBoxes;
+
+  self->numInputChannels = pSpatialSpecificConfig->nInputChannels;
+
+  self->numOutputChannels = pSpatialSpecificConfig->nOutputChannels;
+
+  self->quantMode = pSpatialSpecificConfig->quantMode;
+
+  self->arbitraryDownmix = pSpatialSpecificConfig->bArbitraryDownmix;
+
+  self->numM2rows = self->numOutputChannels;
+
+  {
+    self->residualCoding = 0;
+    if (self->arbitraryDownmix == 2)
+      self->arbitraryDownmix = 1; /* no arbitrary downmix residuals */
+  }
+  if ((self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_USAC)) {
+    self->residualCoding = pSpatialSpecificConfig->bResidualCoding;
+  }
+
+  self->clipProtectGain__FDK =
+      FX_CFG2FX_DBL(clipGainTable__FDK[pSpatialSpecificConfig->bsFixedGainDMX]);
+  self->clipProtectGainSF__FDK =
+      clipGainSFTable__FDK[pSpatialSpecificConfig->bsFixedGainDMX];
+
+  self->tempShapeConfig = pSpatialSpecificConfig->tempShapeConfig;
+
+  self->decorrConfig = pSpatialSpecificConfig->decorrConfig;
+
+  if (self->upmixType == UPMIXTYPE_BYPASS) {
+    self->numOutputChannels = self->numInputChannels;
+  }
+
+  self->numOutputChannelsAT = self->numOutputChannels;
+
+  self->numOttBandsIPD = pSpatialSpecificConfig->numOttBandsIPD;
+  self->phaseCoding = pSpatialSpecificConfig->bsPhaseCoding;
+  for (i = 0; i < self->numOttBoxes; i++) {
+    {
+      self->pConfigCurrent->bitstreamOttBands[i] =
+          self->bitstreamParameterBands;
+    }
+    self->numOttBands[i] = self->pConfigCurrent->bitstreamOttBands[i];
+  } /* i */
+
+  if (self->residualCoding) {
+    int numBoxes = self->numOttBoxes;
+    for (i = 0; i < numBoxes; i++) {
+      self->residualPresent[i] =
+          pSpatialSpecificConfig->ResidualConfig[i].bResidualPresent;
+
+      if (self->residualPresent[i]) {
+        self->residualBands[i] =
+            pSpatialSpecificConfig->ResidualConfig[i].nResidualBands;
+        /* conversion from hybrid bands to qmf bands */
+        self->residualQMFBands[i] =
+            fMax(self->param2hyb[self->residualBands[i]] + 3 - 10,
+                 3); /* simplification for the lowest 10 hybrid bands */
+      } else {
+        self->residualBands[i] = 0;
+        self->residualQMFBands[i] = 0;
+      }
+    }
+  } /* self->residualCoding */
+  else {
+    int boxes = self->numOttBoxes;
+    for (i = 0; i < boxes; i += 1) {
+      self->residualPresent[i] = 0;
+      self->residualBands[i] = 0;
+    }
+  }
+
+  switch (self->treeConfig) {
+    case TREE_212:
+      self->numDirektSignals = 1;
+      self->numDecorSignals = 1;
+      self->numXChannels = 1;
+      if (self->arbitraryDownmix == 2) {
+        self->numXChannels += 1;
+      }
+      self->numVChannels = self->numDirektSignals + self->numDecorSignals;
+      break;
+    default:
+      return MPS_INVALID_TREECONFIG;
+  }
+
+  self->highRateMode = pSpatialSpecificConfig->bsHighRateMode;
+  self->decorrType = pSpatialSpecificConfig->bsDecorrType;
+
+  SpatialDecDecodeHelperInfo(pSpatialSpecificConfig, UPMIXTYPE_NORMAL);
+
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecCreateBsFrame
+ *******************************************************************************
+
+ Description: Create spatial bitstream structure
+
+ Arguments:   spatialDec* self
+              const SPATIAL_BS_FRAME **bsFrame
+
+ Return:      -
+
+*******************************************************************************/
+SACDEC_ERROR SpatialDecCreateBsFrame(SPATIAL_BS_FRAME *bsFrame,
+                                     BS_LL_STATE *llState) {
+  SPATIAL_BS_FRAME *pBs = bsFrame;
+
+  const int maxNumOtt = MAX_NUM_OTT;
+  const int maxNumInputChannels = MAX_INPUT_CHANNELS;
+
+  FDK_ALLOCATE_MEMORY_1D_P(
+      pBs->cmpOttIPDidx, maxNumOtt * MAX_PARAMETER_SETS * MAX_PARAMETER_BANDS,
+      SCHAR, SCHAR(*)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS])
+
+  /* Arbitrary Downmix */
+  FDK_ALLOCATE_MEMORY_1D_P(
+      pBs->cmpArbdmxGainIdx,
+      maxNumInputChannels * MAX_PARAMETER_SETS * MAX_PARAMETER_BANDS, SCHAR,
+      SCHAR(*)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS])
+
+  /* Lossless control */
+  FDK_ALLOCATE_MEMORY_1D(pBs->CLDLosslessData, MAX_NUM_PARAMETERS, LOSSLESSDATA)
+  FDK_ALLOCATE_MEMORY_1D(pBs->ICCLosslessData, MAX_NUM_PARAMETERS, LOSSLESSDATA)
+
+  FDK_ALLOCATE_MEMORY_1D(pBs->IPDLosslessData, MAX_NUM_PARAMETERS, LOSSLESSDATA)
+
+  pBs->newBsData = 0;
+  pBs->numParameterSets = 1;
+
+  /* Link lossless states */
+  for (int x = 0; x < MAX_NUM_PARAMETERS; x++) {
+    pBs->CLDLosslessData[x].state = &llState->CLDLosslessState[x];
+    pBs->ICCLosslessData[x].state = &llState->ICCLosslessState[x];
+
+    pBs->IPDLosslessData[x].state = &llState->IPDLosslessState[x];
+  }
+
+  return MPS_OK;
+
+bail:
+  return MPS_OUTOFMEMORY;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecCloseBsFrame
+ *******************************************************************************
+
+ Description: Close spatial bitstream structure
+
+ Arguments:   spatialDec* self
+
+ Return:      -
+
+*******************************************************************************/
+void SpatialDecCloseBsFrame(SPATIAL_BS_FRAME *pBs) {
+  if (pBs != NULL) {
+    /* These arrays contain the compact indices, only one value per pbstride,
+     * only paramsets actually containing data. */
+
+    FDK_FREE_MEMORY_1D(pBs->cmpOttIPDidx);
+
+    /* Arbitrary Downmix */
+    FDK_FREE_MEMORY_1D(pBs->cmpArbdmxGainIdx);
+
+    /* Lossless control */
+    FDK_FREE_MEMORY_1D(pBs->IPDLosslessData);
+    FDK_FREE_MEMORY_1D(pBs->CLDLosslessData);
+    FDK_FREE_MEMORY_1D(pBs->ICCLosslessData);
+  }
+}
diff --git a/fdk-aac/libSACdec/src/sac_bitdec.h b/fdk-aac/libSACdec/src/sac_bitdec.h
new file mode 100644
index 0000000..cb0c7d2
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_bitdec.h
@@ -0,0 +1,161 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec bitstream decoder
+
+*******************************************************************************/
+
+/*!
+  \file
+  \brief  Spatial Audio bitstream decoder
+*/
+
+#ifndef SAC_BITDEC_H
+#define SAC_BITDEC_H
+
+#include "sac_dec.h"
+
+typedef struct {
+  SCHAR numInputChannels;
+  SCHAR numOutputChannels;
+  SCHAR numOttBoxes;
+  SCHAR numTttBoxes;
+  SCHAR ottModeLfe[MAX_NUM_OTT];
+} TREEPROPERTIES;
+
+enum { TREE_212 = 7, TREE_DUMMY = 255 };
+
+enum { QUANT_FINE = 0, QUANT_EBQ1 = 1, QUANT_EBQ2 = 2 };
+
+SACDEC_ERROR SpatialDecParseSpecificConfigHeader(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, SPATIAL_DEC_UPMIX_TYPE upmixType);
+
+SACDEC_ERROR SpatialDecParseMps212Config(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, int samplingRate,
+    AUDIO_OBJECT_TYPE coreCodec, INT stereoConfigIndex,
+    INT coreSbrFrameLengthIndex);
+
+SACDEC_ERROR SpatialDecParseSpecificConfig(
+    HANDLE_FDK_BITSTREAM bitstream,
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, int sacHeaderLen,
+    AUDIO_OBJECT_TYPE coreCodec);
+
+int SpatialDecDefaultSpecificConfig(
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, int samplingFreq, int nTimeSlots,
+    int sacDecoderLevel, int isBlind, int coreChannels);
+
+SACDEC_ERROR SpatialDecCreateBsFrame(SPATIAL_BS_FRAME *bsFrame,
+                                     BS_LL_STATE *llState);
+
+void SpatialDecCloseBsFrame(SPATIAL_BS_FRAME *bsFrame);
+
+SACDEC_ERROR SpatialDecParseFrameData(
+    spatialDec *self, SPATIAL_BS_FRAME *frame, HANDLE_FDK_BITSTREAM bitstream,
+    const SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, UPMIXTYPE upmixType,
+    int fGlobalIndependencyFlag);
+
+SACDEC_ERROR SpatialDecDecodeFrame(spatialDec *self, SPATIAL_BS_FRAME *frame);
+
+SACDEC_ERROR SpatialDecDecodeHeader(
+    spatialDec *self, SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig);
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_calcM1andM2.cpp b/fdk-aac/libSACdec/src/sac_calcM1andM2.cpp
new file mode 100644
index 0000000..6e5a145
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_calcM1andM2.cpp
@@ -0,0 +1,848 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec M1 and M2 calculation
+
+*******************************************************************************/
+
+#include "sac_calcM1andM2.h"
+#include "sac_bitdec.h"
+#include "sac_process.h"
+#include "sac_rom.h"
+#include "sac_smoothing.h"
+#include "FDK_trigFcts.h"
+
+/* assorted definitions and constants */
+
+#define ABS_THR2 1.0e-9
+#define SQRT2_FDK \
+  ((FIXP_DBL)FL2FXCONST_DBL(0.70710678118f)) /* FDKsqrt(2.0) scaled by 0.5 */
+
+static void param2UMX_PS__FDK(spatialDec* self,
+                              FIXP_DBL H11[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H12[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H21[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H22[MAX_PARAMETER_BANDS],
+                              FIXP_DBL c_l[MAX_PARAMETER_BANDS],
+                              FIXP_DBL c_r[MAX_PARAMETER_BANDS], int ottBoxIndx,
+                              int parameterSetIndx, int resBands);
+
+static void param2UMX_PS_Core__FDK(
+    const SCHAR cld[MAX_PARAMETER_BANDS], const SCHAR icc[MAX_PARAMETER_BANDS],
+    const int numOttBands, const int resBands,
+    FIXP_DBL H11[MAX_PARAMETER_BANDS], FIXP_DBL H12[MAX_PARAMETER_BANDS],
+    FIXP_DBL H21[MAX_PARAMETER_BANDS], FIXP_DBL H22[MAX_PARAMETER_BANDS],
+    FIXP_DBL c_l[MAX_PARAMETER_BANDS], FIXP_DBL c_r[MAX_PARAMETER_BANDS]);
+
+static void param2UMX_PS_IPD_OPD__FDK(
+    spatialDec* self, const SPATIAL_BS_FRAME* frame,
+    FIXP_DBL H11re[MAX_PARAMETER_BANDS], FIXP_DBL H12re[MAX_PARAMETER_BANDS],
+    FIXP_DBL H21re[MAX_PARAMETER_BANDS], FIXP_DBL H22re[MAX_PARAMETER_BANDS],
+    FIXP_DBL c_l[MAX_PARAMETER_BANDS], FIXP_DBL c_r[MAX_PARAMETER_BANDS],
+    int ottBoxIndx, int parameterSetIndx, int residualBands);
+
+static void param2UMX_Prediction__FDK(
+    spatialDec* self, FIXP_DBL H11re[MAX_PARAMETER_BANDS],
+    FIXP_DBL H11im[MAX_PARAMETER_BANDS], FIXP_DBL H12re[MAX_PARAMETER_BANDS],
+    FIXP_DBL H12im[MAX_PARAMETER_BANDS], FIXP_DBL H21re[MAX_PARAMETER_BANDS],
+    FIXP_DBL H21im[MAX_PARAMETER_BANDS], FIXP_DBL H22re[MAX_PARAMETER_BANDS],
+    FIXP_DBL H22im[MAX_PARAMETER_BANDS], int ottBoxIndx, int parameterSetIndx,
+    int resBands);
+
+/* static void SpatialDecCalculateM0(spatialDec* self,int ps); */
+static SACDEC_ERROR SpatialDecCalculateM1andM2_212(
+    spatialDec* self, int ps, const SPATIAL_BS_FRAME* frame);
+
+/*******************************************************************************
+ Functionname: SpatialDecGetResidualIndex
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+
+ Output:
+
+*******************************************************************************/
+int SpatialDecGetResidualIndex(spatialDec* self, int row) {
+  return row2residual[self->treeConfig][row];
+}
+
+/*******************************************************************************
+ Functionname: UpdateAlpha
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+
+ Output:
+
+*******************************************************************************/
+static void updateAlpha(spatialDec* self) {
+  int nChIn = self->numInputChannels;
+  int ch;
+
+  for (ch = 0; ch < nChIn; ch++) {
+    FIXP_DBL alpha = /* FL2FXCONST_DBL(1.0f) */ (FIXP_DBL)MAXVAL_DBL;
+
+    self->arbdmxAlphaPrev__FDK[ch] = self->arbdmxAlpha__FDK[ch];
+
+    self->arbdmxAlpha__FDK[ch] = alpha;
+  }
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecCalculateM1andM2
+ *******************************************************************************
+ Description:
+ Arguments:
+*******************************************************************************/
+SACDEC_ERROR SpatialDecCalculateM1andM2(spatialDec* self, int ps,
+                                        const SPATIAL_BS_FRAME* frame) {
+  SACDEC_ERROR err = MPS_OK;
+
+  if ((self->arbitraryDownmix != 0) && (ps == 0)) {
+    updateAlpha(self);
+  }
+
+  self->pActivM2ParamBands = NULL;
+
+  switch (self->upmixType) {
+    case UPMIXTYPE_BYPASS:
+    case UPMIXTYPE_NORMAL:
+      switch (self->treeConfig) {
+        case TREE_212:
+          err = SpatialDecCalculateM1andM2_212(self, ps, frame);
+          break;
+        default:
+          err = MPS_WRONG_TREECONFIG;
+      };
+      break;
+
+    default:
+      err = MPS_WRONG_TREECONFIG;
+  }
+
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+bail:
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecCalculateM1andM2_212
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static SACDEC_ERROR SpatialDecCalculateM1andM2_212(
+    spatialDec* self, int ps, const SPATIAL_BS_FRAME* frame) {
+  SACDEC_ERROR err = MPS_OK;
+  int pb;
+
+  FIXP_DBL H11re[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+  FIXP_DBL H12re[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+  FIXP_DBL H21re[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+  FIXP_DBL H22re[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+  FIXP_DBL H11im[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+  FIXP_DBL H21im[MAX_PARAMETER_BANDS] = {FL2FXCONST_DBL(0.0f)};
+
+  INT phaseCoding = self->phaseCoding;
+
+  switch (phaseCoding) {
+    case 1:
+      /* phase coding: yes; residuals: no */
+      param2UMX_PS_IPD_OPD__FDK(self, frame, H11re, H12re, H21re, H22re, NULL,
+                                NULL, 0, ps, self->residualBands[0]);
+      break;
+    case 3:
+      /* phase coding: yes; residuals: yes */
+      param2UMX_Prediction__FDK(self, H11re, H11im, H12re, NULL, H21re, H21im,
+                                H22re, NULL, 0, ps, self->residualBands[0]);
+      break;
+    default:
+      if (self->residualCoding) {
+        /* phase coding: no; residuals: yes */
+        param2UMX_Prediction__FDK(self, H11re, NULL, H12re, NULL, H21re, NULL,
+                                  H22re, NULL, 0, ps, self->residualBands[0]);
+      } else {
+        /* phase coding: no; residuals: no */
+        param2UMX_PS__FDK(self, H11re, H12re, H21re, H22re, NULL, NULL, 0, ps,
+                          0);
+      }
+      break;
+  }
+
+  for (pb = 0; pb < self->numParameterBands; pb++) {
+    self->M2Real__FDK[0][0][pb] = (H11re[pb]);
+    self->M2Real__FDK[0][1][pb] = (H12re[pb]);
+
+    self->M2Real__FDK[1][0][pb] = (H21re[pb]);
+    self->M2Real__FDK[1][1][pb] = (H22re[pb]);
+  }
+  if (phaseCoding == 3) {
+    for (pb = 0; pb < self->numParameterBands; pb++) {
+      self->M2Imag__FDK[0][0][pb] = (H11im[pb]);
+      self->M2Imag__FDK[1][0][pb] = (H21im[pb]);
+      self->M2Imag__FDK[0][1][pb] = (FIXP_DBL)0;  // H12im[pb];
+      self->M2Imag__FDK[1][1][pb] = (FIXP_DBL)0;  // H22im[pb];
+    }
+  }
+
+  if (self->phaseCoding == 1) {
+    SpatialDecSmoothOPD(
+        self, frame,
+        ps); /* INPUT: PhaseLeft, PhaseRight, (opdLeftState, opdRightState) */
+  }
+
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: param2UMX_PS_Core
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void param2UMX_PS_Core__FDK(
+    const SCHAR cld[MAX_PARAMETER_BANDS], const SCHAR icc[MAX_PARAMETER_BANDS],
+    const int numOttBands, const int resBands,
+    FIXP_DBL H11[MAX_PARAMETER_BANDS], FIXP_DBL H12[MAX_PARAMETER_BANDS],
+    FIXP_DBL H21[MAX_PARAMETER_BANDS], FIXP_DBL H22[MAX_PARAMETER_BANDS],
+    FIXP_DBL c_l[MAX_PARAMETER_BANDS], FIXP_DBL c_r[MAX_PARAMETER_BANDS]) {
+  int band;
+
+  if ((c_l != NULL) && (c_r != NULL)) {
+    for (band = 0; band < numOttBands; band++) {
+      SpatialDequantGetCLDValues(cld[band], &c_l[band], &c_r[band]);
+    }
+  }
+
+  band = 0;
+  FDK_ASSERT(resBands == 0);
+  for (; band < numOttBands; band++) {
+    /* compute mixing variables: */
+    const int idx1 = cld[band];
+    const int idx2 = icc[band];
+    H11[band] = FX_CFG2FX_DBL(H11_nc[idx1][idx2]);
+    H21[band] = FX_CFG2FX_DBL(H11_nc[30 - idx1][idx2]);
+    H12[band] = FX_CFG2FX_DBL(H12_nc[idx1][idx2]);
+    H22[band] = FX_CFG2FX_DBL(-H12_nc[30 - idx1][idx2]);
+  }
+}
+
+/*******************************************************************************
+ Functionname: param2UMX_PS
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void param2UMX_PS__FDK(spatialDec* self,
+                              FIXP_DBL H11[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H12[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H21[MAX_PARAMETER_BANDS],
+                              FIXP_DBL H22[MAX_PARAMETER_BANDS],
+                              FIXP_DBL c_l[MAX_PARAMETER_BANDS],
+                              FIXP_DBL c_r[MAX_PARAMETER_BANDS], int ottBoxIndx,
+                              int parameterSetIndx, int residualBands) {
+  int band;
+  param2UMX_PS_Core__FDK(self->ottCLD__FDK[ottBoxIndx][parameterSetIndx],
+                         self->ottICC__FDK[ottBoxIndx][parameterSetIndx],
+                         self->numOttBands[ottBoxIndx], residualBands, H11, H12,
+                         H21, H22, c_l, c_r);
+
+  for (band = self->numOttBands[ottBoxIndx]; band < self->numParameterBands;
+       band++) {
+    H11[band] = H21[band] = H12[band] = H22[band] = FL2FXCONST_DBL(0.f);
+  }
+}
+
+#define N_CLD (31)
+#define N_IPD (16)
+
+static const FIXP_DBL sinIpd_tab[N_IPD] = {
+    FIXP_DBL(0x00000000), FIXP_DBL(0x30fbc54e), FIXP_DBL(0x5a827999),
+    FIXP_DBL(0x7641af3d), FIXP_DBL(0x7fffffff), FIXP_DBL(0x7641af3d),
+    FIXP_DBL(0x5a82799a), FIXP_DBL(0x30fbc54d), FIXP_DBL(0xffffffff),
+    FIXP_DBL(0xcf043ab3), FIXP_DBL(0xa57d8666), FIXP_DBL(0x89be50c3),
+    FIXP_DBL(0x80000000), FIXP_DBL(0x89be50c3), FIXP_DBL(0xa57d8666),
+    FIXP_DBL(0xcf043ab2),
+};
+
+/* cosIpd[i] = sinIpd[(i+4)&15] */
+#define SIN_IPD(a) (sinIpd_tab[(a)])
+#define COS_IPD(a) (sinIpd_tab[((a) + 4) & 15])  //(cosIpd_tab[(a)])
+
+static const FIXP_SGL sqrt_one_minus_ICC2[8] = {
+    FL2FXCONST_SGL(0.0f),
+    FL2FXCONST_SGL(0.349329357483736f),
+    FL2FXCONST_SGL(0.540755219669676f),
+    FL2FXCONST_SGL(0.799309172723546f),
+    FL2FXCONST_SGL(0.929968187843004f),
+    FX_DBL2FXCONST_SGL(MAXVAL_DBL),
+    FL2FXCONST_SGL(0.80813303360276f),
+    FL2FXCONST_SGL(0.141067359796659f),
+};
+
+/* exponent of sqrt(CLD) */
+static const SCHAR sqrt_CLD_e[N_CLD] = {
+    -24, -7, -6, -5, -4, -4, -3, -3, -2, -2, -1, -1, 0, 0, 0, 1,
+    1,   1,  1,  2,  2,  3,  3,  4,  4,  5,  5,  6,  7, 8, 25};
+
+static const FIXP_DBL sqrt_CLD_m[N_CLD] = {
+    FL2FXCONST_DBL(0.530542153566195f),
+    FL2FXCONST_DBL(0.719796896243647f),
+    FL2FXCONST_DBL(0.64f),
+    FL2FXCONST_DBL(0.569049411212455f),
+    FL2FXCONST_DBL(0.505964425626941f),
+    FL2FXCONST_DBL(0.899746120304559f),
+    FL2FXCONST_DBL(0.635462587779425f),
+    FL2FXCONST_DBL(0.897614763441571f),
+    FL2FXCONST_DBL(0.633957276984445f),
+    FL2FXCONST_DBL(0.895488455427336f),
+    FL2FXCONST_DBL(0.632455532033676f),
+    FL2FXCONST_DBL(0.796214341106995f),
+    FL2FXCONST_DBL(0.501187233627272f),
+    FL2FXCONST_DBL(0.630957344480193f),
+    FL2FXCONST_DBL(0.794328234724281f),
+    FL2FXCONST_DBL(0.5f),
+    FL2FXCONST_DBL(0.629462705897084f),
+    FL2FXCONST_DBL(0.792446596230557f),
+    FL2FXCONST_DBL(0.99763115748444f),
+    FL2FXCONST_DBL(0.627971607877395f),
+    FL2FXCONST_DBL(0.790569415042095f),
+    FL2FXCONST_DBL(0.558354490188704f),
+    FL2FXCONST_DBL(0.788696680600242f),
+    FL2FXCONST_DBL(0.557031836333591f),
+    FL2FXCONST_DBL(0.786828382371355f),
+    FL2FXCONST_DBL(0.555712315637163f),
+    FL2FXCONST_DBL(0.988211768802619f),
+    FL2FXCONST_DBL(0.87865832060992f),
+    FL2FXCONST_DBL(0.78125f),
+    FL2FXCONST_DBL(0.694640394546454f),
+    FL2FXCONST_DBL(0.942432183077448f),
+};
+
+static const FIXP_DBL CLD_m[N_CLD] = {
+    FL2FXCONST_DBL(0.281474976710656f),
+    FL2FXCONST_DBL(0.518107571841987f),
+    FL2FXCONST_DBL(0.4096f),
+    FL2FXCONST_DBL(0.323817232401242f),
+    FL2FXCONST_DBL(0.256f),
+    FL2FXCONST_DBL(0.809543081003105f),
+    FL2FXCONST_DBL(0.403812700467324f),
+    FL2FXCONST_DBL(0.805712263548267f),
+    FL2FXCONST_DBL(0.401901829041533f),
+    FL2FXCONST_DBL(0.801899573803636f),
+    FL2FXCONST_DBL(0.4f),
+    FL2FXCONST_DBL(0.633957276984445f),
+    FL2FXCONST_DBL(0.251188643150958f),
+    FL2FXCONST_DBL(0.398107170553497f),
+    FL2FXCONST_DBL(0.630957344480193f),
+    FL2FXCONST_DBL(0.25f),
+    FL2FXCONST_DBL(0.396223298115278f),
+    FL2FXCONST_DBL(0.627971607877395f),
+    FL2FXCONST_DBL(0.995267926383743f),
+    FL2FXCONST_DBL(0.394348340300121f),
+    FL2FXCONST_DBL(0.625f),
+    FL2FXCONST_DBL(0.311759736713887f),
+    FL2FXCONST_DBL(0.62204245398984f),
+    FL2FXCONST_DBL(0.310284466689172f),
+    FL2FXCONST_DBL(0.619098903305123f),
+    FL2FXCONST_DBL(0.308816177750818f),
+    FL2FXCONST_DBL(0.9765625f),
+    FL2FXCONST_DBL(0.772040444377046f),
+    FL2FXCONST_DBL(0.6103515625f),
+    FL2FXCONST_DBL(0.482525277735654f),
+    FL2FXCONST_DBL(0.888178419700125),
+};
+
+static FIXP_DBL dequantIPD_CLD_ICC_splitAngle__FDK_Function(INT ipdIdx,
+                                                            INT cldIdx,
+                                                            INT iccIdx) {
+  FIXP_DBL cld;
+  SpatialDequantGetCLD2Values(cldIdx, &cld);
+
+  /*const FIXP_DBL one_m = (FIXP_DBL)MAXVAL_DBL;
+  const int one_e = 0;*/
+  const FIXP_DBL one_m = FL2FXCONST_DBL(0.5f);
+  const int one_e = 1;
+  /* iidLin = sqrt(cld); */
+  FIXP_DBL iidLin_m = sqrt_CLD_m[cldIdx];
+  int iidLin_e = sqrt_CLD_e[cldIdx];
+  /* iidLin2 = cld; */
+  FIXP_DBL iidLin2_m = CLD_m[cldIdx];
+  int iidLin2_e = sqrt_CLD_e[cldIdx] << 1;
+  /* iidLin21 = iidLin2 + 1.0f; */
+  int iidLin21_e;
+  FIXP_DBL iidLin21_m =
+      fAddNorm(iidLin2_m, iidLin2_e, one_m, one_e, &iidLin21_e);
+  /* iidIcc2 = iidLin * icc * 2.0f; */
+  FIXP_CFG icc = dequantICC__FDK[iccIdx];
+  FIXP_DBL temp1_m, temp1c_m;
+  int temp1_e, temp1c_e;
+  temp1_m = fMult(iidLin_m, icc);
+  temp1_e = iidLin_e + 1;
+
+  FIXP_DBL cosIpd, sinIpd;
+  cosIpd = COS_IPD(ipdIdx);
+  sinIpd = SIN_IPD(ipdIdx);
+
+  temp1c_m = fMult(temp1_m, cosIpd);
+  temp1c_e = temp1_e;  //+cosIpd_e;
+
+  int temp2_e, temp3_e, inv_temp3_e, ratio_e;
+  FIXP_DBL temp2_m =
+      fAddNorm(iidLin21_m, iidLin21_e, temp1c_m, temp1c_e, &temp2_e);
+  FIXP_DBL temp3_m =
+      fAddNorm(iidLin21_m, iidLin21_e, temp1_m, temp1_e, &temp3_e);
+  /* calculate 1/temp3 needed later */
+  inv_temp3_e = temp3_e;
+  FIXP_DBL inv_temp3_m = invFixp(temp3_m, &inv_temp3_e);
+  FIXP_DBL ratio_m =
+      fAddNorm(fMult(inv_temp3_m, temp2_m), (inv_temp3_e + temp2_e),
+               FL2FXCONST_DBL(1e-9f), 0, &ratio_e);
+
+  int weight2_e, tempb_atan2_e;
+  FIXP_DBL weight2_m =
+      fPow(ratio_m, ratio_e, FL2FXCONST_DBL(0.5f), -1, &weight2_e);
+  /* atan2(w2*sinIpd, w1*iidLin + w2*cosIpd) = atan2(w2*sinIpd, (2 - w2)*iidLin
+   * + w2*cosIpd) = atan2(w2*sinIpd, 2*iidLin + w2*(cosIpd - iidLin)); */
+  /* tmpa_atan2 = w2*sinIpd; tmpb_atan2 = 2*iidLin + w2*(cosIpd - iidLin); */
+  FIXP_DBL tempb_atan2_m = iidLin_m;
+  tempb_atan2_e = iidLin_e + 1;
+  int add_tmp1_e = 0;
+  FIXP_DBL add_tmp1_m = fAddNorm(cosIpd, 0, -iidLin_m, iidLin_e, &add_tmp1_e);
+  FIXP_DBL add_tmp2_m = fMult(add_tmp1_m, weight2_m);
+  int add_tmp2_e = add_tmp1_e + weight2_e;
+  tempb_atan2_m = fAddNorm(tempb_atan2_m, tempb_atan2_e, add_tmp2_m, add_tmp2_e,
+                           &tempb_atan2_e);
+
+  FIXP_DBL tempa_atan2_m = fMult(weight2_m, sinIpd);
+  int tempa_atan2_e = weight2_e;  // + sinIpd_e;
+
+  if (tempa_atan2_e > tempb_atan2_e) {
+    tempb_atan2_m = (tempb_atan2_m >> (tempa_atan2_e - tempb_atan2_e));
+    tempb_atan2_e = tempa_atan2_e;
+  } else if (tempb_atan2_e > tempa_atan2_e) {
+    tempa_atan2_m = (tempa_atan2_m >> (tempb_atan2_e - tempa_atan2_e));
+  }
+
+  return fixp_atan2(tempa_atan2_m, tempb_atan2_m);
+}
+
+static void calculateOpd(spatialDec* self, INT ottBoxIndx, INT parameterSetIndx,
+                         FIXP_DBL opd[MAX_PARAMETER_BANDS]) {
+  INT band;
+
+  for (band = 0; band < self->numOttBandsIPD; band++) {
+    INT idxCld = self->ottCLD__FDK[ottBoxIndx][parameterSetIndx][band];
+    INT idxIpd = self->ottIPD__FDK[ottBoxIndx][parameterSetIndx][band];
+    INT idxIcc = self->ottICC__FDK[ottBoxIndx][parameterSetIndx][band];
+    FIXP_DBL cld, ipd;
+
+    ipd = FX_CFG2FX_DBL(dequantIPD__FDK[idxIpd]);
+
+    SpatialDequantGetCLD2Values(idxCld, &cld);
+
+    /* ipd(idxIpd==8) == PI */
+    if ((cld == FL2FXCONST_DBL(0.0f)) && (idxIpd == 8)) {
+      opd[2 * band] = FL2FXCONST_DBL(0.0f);
+    } else {
+      opd[2 * band] = (dequantIPD_CLD_ICC_splitAngle__FDK_Function(
+                           idxIpd, idxCld, idxIcc) >>
+                       (IPD_SCALE - AT2O_SF));
+    }
+    opd[2 * band + 1] = opd[2 * band] - ipd;
+  }
+}
+
+/* wrap phase in rad to the range of 0 <= x < 2*pi */
+static FIXP_DBL wrapPhase(FIXP_DBL phase) {
+  while (phase < (FIXP_DBL)0) phase += PIx2__IPD;
+  while (phase >= PIx2__IPD) phase -= PIx2__IPD;
+  FDK_ASSERT((phase >= (FIXP_DBL)0) && (phase < PIx2__IPD));
+
+  return phase;
+}
+
+/*******************************************************************************
+ Functionname: param2UMX_PS_IPD
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static void param2UMX_PS_IPD_OPD__FDK(
+    spatialDec* self, const SPATIAL_BS_FRAME* frame,
+    FIXP_DBL H11[MAX_PARAMETER_BANDS], FIXP_DBL H12[MAX_PARAMETER_BANDS],
+    FIXP_DBL H21[MAX_PARAMETER_BANDS], FIXP_DBL H22[MAX_PARAMETER_BANDS],
+    FIXP_DBL c_l[MAX_PARAMETER_BANDS], FIXP_DBL c_r[MAX_PARAMETER_BANDS],
+    int ottBoxIndx, int parameterSetIndx, int residualBands) {
+  INT band;
+  FIXP_DBL opd[2 * MAX_PARAMETER_BANDS];
+  INT numOttBands = self->numOttBands[ottBoxIndx];
+  INT numIpdBands;
+
+  numIpdBands = frame->phaseMode ? self->numOttBandsIPD : 0;
+
+  FDK_ASSERT(self->residualCoding == 0);
+
+  param2UMX_PS_Core__FDK(self->ottCLD__FDK[ottBoxIndx][parameterSetIndx],
+                         self->ottICC__FDK[ottBoxIndx][parameterSetIndx],
+                         self->numOttBands[ottBoxIndx], residualBands, H11, H12,
+                         H21, H22, c_l, c_r);
+
+  for (band = self->numOttBands[ottBoxIndx]; band < self->numParameterBands;
+       band++) {
+    H11[band] = H21[band] = H12[band] = H22[band] = FL2FXCONST_DBL(0.f);
+  }
+
+  if (frame->phaseMode) {
+    calculateOpd(self, ottBoxIndx, parameterSetIndx, opd);
+
+    for (band = 0; band < numIpdBands; band++) {
+      self->PhaseLeft__FDK[band] = wrapPhase(opd[2 * band]);
+      self->PhaseRight__FDK[band] = wrapPhase(opd[2 * band + 1]);
+    }
+  }
+
+  for (band = numIpdBands; band < numOttBands; band++) {
+    self->PhaseLeft__FDK[band] = FL2FXCONST_DBL(0.0f);
+    self->PhaseRight__FDK[band] = FL2FXCONST_DBL(0.0f);
+  }
+}
+
+FDK_INLINE void param2UMX_Prediction_Core__FDK(
+    FIXP_DBL* H11re, FIXP_DBL* H11im, FIXP_DBL* H12re, FIXP_DBL* H12im,
+    FIXP_DBL* H21re, FIXP_DBL* H21im, FIXP_DBL* H22re, FIXP_DBL* H22im,
+    int cldIdx, int iccIdx, int ipdIdx, int band, int numOttBandsIPD,
+    int resBands) {
+#define MAX_WEIGHT (1.2f)
+  FDK_ASSERT((H12im == NULL) && (H22im == NULL)); /* always == 0 */
+
+  if ((band < numOttBandsIPD) && (cldIdx == 15) && (iccIdx == 0) &&
+      (ipdIdx == 8)) {
+    const FIXP_DBL gain =
+        FL2FXCONST_DBL(0.5f / MAX_WEIGHT) >> SCALE_PARAM_M2_212_PRED;
+
+    *H11re = gain;
+    if (band < resBands) {
+      *H21re = gain;
+      *H12re = gain;
+      *H22re = -gain;
+    } else {
+      *H21re = -gain;
+      *H12re = (FIXP_DBL)0;
+      *H22re = (FIXP_DBL)0;
+    }
+    if ((H11im != NULL) &&
+        (H21im != NULL) /*&& (H12im!=NULL) && (H22im!=NULL)*/) {
+      *H11im = (FIXP_DBL)0;
+      *H21im = (FIXP_DBL)0;
+      /* *H12im = (FIXP_DBL)0; */
+      /* *H22im = (FIXP_DBL)0; */
+    }
+  } else {
+    const FIXP_DBL one_m = (FIXP_DBL)MAXVAL_DBL;
+    const int one_e = 0;
+    /* iidLin = sqrt(cld); */
+    FIXP_DBL iidLin_m = sqrt_CLD_m[cldIdx];
+    int iidLin_e = sqrt_CLD_e[cldIdx];
+    /* iidLin2 = cld; */
+    FIXP_DBL iidLin2_m = CLD_m[cldIdx];
+    int iidLin2_e = sqrt_CLD_e[cldIdx] << 1;
+    /* iidLin21 = iidLin2 + 1.0f; */
+    int iidLin21_e;
+    FIXP_DBL iidLin21_m =
+        fAddNorm(iidLin2_m, iidLin2_e, one_m, one_e, &iidLin21_e);
+    /* iidIcc2 = iidLin * icc * 2.0f; */
+    FIXP_CFG icc = dequantICC__FDK[iccIdx];
+    int iidIcc2_e = iidLin_e + 1;
+    FIXP_DBL iidIcc2_m = fMult(iidLin_m, icc);
+    FIXP_DBL temp_m, sqrt_temp_m, inv_temp_m, weight_m;
+    int temp_e, sqrt_temp_e, inv_temp_e, weight_e, scale;
+    FIXP_DBL cosIpd, sinIpd;
+
+    cosIpd = COS_IPD((band < numOttBandsIPD) ? ipdIdx : 0);
+    sinIpd = SIN_IPD((band < numOttBandsIPD) ? ipdIdx : 0);
+
+    /* temp    = iidLin21 + iidIcc2 * cosIpd; */
+    temp_m = fAddNorm(iidLin21_m, iidLin21_e, fMult(iidIcc2_m, cosIpd),
+                      iidIcc2_e, &temp_e);
+
+    /* calculate 1/temp needed later */
+    inv_temp_e = temp_e;
+    inv_temp_m = invFixp(temp_m, &inv_temp_e);
+
+    /* 1/weight = sqrt(temp) * 1/sqrt(iidLin21) */
+    if (temp_e & 1) {
+      sqrt_temp_m = temp_m >> 1;
+      sqrt_temp_e = (temp_e + 1) >> 1;
+    } else {
+      sqrt_temp_m = temp_m;
+      sqrt_temp_e = temp_e >> 1;
+    }
+    sqrt_temp_m = sqrtFixp(sqrt_temp_m);
+    if (iidLin21_e & 1) {
+      iidLin21_e += 1;
+      iidLin21_m >>= 1;
+    }
+    /* weight_[m,e] is actually 1/weight in the next few lines */
+    weight_m = invSqrtNorm2(iidLin21_m, &weight_e);
+    weight_e -= iidLin21_e >> 1;
+    weight_m = fMult(sqrt_temp_m, weight_m);
+    weight_e += sqrt_temp_e;
+    scale = fNorm(weight_m);
+    weight_m = scaleValue(weight_m, scale);
+    weight_e -= scale;
+    /* weight = 0.5 * max(1/weight, 1/maxWeight) */
+    if ((weight_e < 0) ||
+        ((weight_e == 0) && (weight_m < FL2FXCONST_DBL(1.f / MAX_WEIGHT)))) {
+      weight_m = FL2FXCONST_DBL(1.f / MAX_WEIGHT);
+      weight_e = 0;
+    }
+    weight_e -= 1;
+
+    {
+      FIXP_DBL alphaRe_m, alphaIm_m, accu_m;
+      int alphaRe_e, alphaIm_e, accu_e;
+      /* alphaRe = (1.0f - iidLin2) / temp; */
+      alphaRe_m = fAddNorm(one_m, one_e, -iidLin2_m, iidLin2_e, &alphaRe_e);
+      alphaRe_m = fMult(alphaRe_m, inv_temp_m);
+      alphaRe_e += inv_temp_e;
+
+      /* H11re = weight - alphaRe * weight; */
+      /* H21re = weight + alphaRe * weight; */
+      accu_m = fMult(alphaRe_m, weight_m);
+      accu_e = alphaRe_e + weight_e;
+      {
+        int accu2_e;
+        FIXP_DBL accu2_m;
+        accu2_m = fAddNorm(weight_m, weight_e, -accu_m, accu_e, &accu2_e);
+        *H11re = scaleValue(accu2_m, accu2_e - SCALE_PARAM_M2_212_PRED);
+        accu2_m = fAddNorm(weight_m, weight_e, accu_m, accu_e, &accu2_e);
+        *H21re = scaleValue(accu2_m, accu2_e - SCALE_PARAM_M2_212_PRED);
+      }
+
+      if ((H11im != NULL) &&
+          (H21im != NULL) /*&& (H12im != NULL) && (H22im != NULL)*/) {
+        /* alphaIm = -iidIcc2 * sinIpd / temp; */
+        alphaIm_m = fMult(-iidIcc2_m, sinIpd);
+        alphaIm_m = fMult(alphaIm_m, inv_temp_m);
+        alphaIm_e = iidIcc2_e + inv_temp_e;
+        /* H11im = -alphaIm * weight; */
+        /* H21im =  alphaIm * weight; */
+        accu_m = fMult(alphaIm_m, weight_m);
+        accu_e = alphaIm_e + weight_e;
+        accu_m = scaleValue(accu_m, accu_e - SCALE_PARAM_M2_212_PRED);
+        *H11im = -accu_m;
+        *H21im = accu_m;
+
+        /* *H12im = (FIXP_DBL)0; */
+        /* *H22im = (FIXP_DBL)0; */
+      }
+    }
+    if (band < resBands) {
+      FIXP_DBL weight =
+          scaleValue(weight_m, weight_e - SCALE_PARAM_M2_212_PRED);
+      *H12re = weight;
+      *H22re = -weight;
+    } else {
+      /* beta = 2.0f * iidLin * (float) sqrt(1.0f - icc * icc) * weight / temp;
+       */
+      FIXP_DBL beta_m;
+      int beta_e;
+      beta_m = FX_SGL2FX_DBL(sqrt_one_minus_ICC2[iccIdx]);
+      beta_e = 1; /* multipication with 2.0f */
+      beta_m = fMult(beta_m, weight_m);
+      beta_e += weight_e;
+      beta_m = fMult(beta_m, iidLin_m);
+      beta_e += iidLin_e;
+      beta_m = fMult(beta_m, inv_temp_m);
+      beta_e += inv_temp_e;
+
+      beta_m = scaleValue(beta_m, beta_e - SCALE_PARAM_M2_212_PRED);
+      *H12re = beta_m;
+      *H22re = -beta_m;
+    }
+  }
+}
+
+static void param2UMX_Prediction__FDK(spatialDec* self, FIXP_DBL* H11re,
+                                      FIXP_DBL* H11im, FIXP_DBL* H12re,
+                                      FIXP_DBL* H12im, FIXP_DBL* H21re,
+                                      FIXP_DBL* H21im, FIXP_DBL* H22re,
+                                      FIXP_DBL* H22im, int ottBoxIndx,
+                                      int parameterSetIndx, int resBands) {
+  int band;
+  FDK_ASSERT((H12im == NULL) && (H22im == NULL)); /* always == 0 */
+
+  for (band = 0; band < self->numParameterBands; band++) {
+    int cldIdx = self->ottCLD__FDK[ottBoxIndx][parameterSetIndx][band];
+    int iccIdx = self->ottICC__FDK[ottBoxIndx][parameterSetIndx][band];
+    int ipdIdx = self->ottIPD__FDK[ottBoxIndx][parameterSetIndx][band];
+
+    param2UMX_Prediction_Core__FDK(
+        &H11re[band], (H11im ? &H11im[band] : NULL), &H12re[band], NULL,
+        &H21re[band], (H21im ? &H21im[band] : NULL), &H22re[band], NULL, cldIdx,
+        iccIdx, ipdIdx, band, self->numOttBandsIPD, resBands);
+  }
+}
+
+/*******************************************************************************
+ Functionname:  initM1andM2
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+
+SACDEC_ERROR initM1andM2(spatialDec* self, int initStatesFlag,
+                         int configChanged) {
+  SACDEC_ERROR err = MPS_OK;
+
+  self->bOverwriteM1M2prev = (configChanged && !initStatesFlag) ? 1 : 0;
+
+  { self->numM2rows = self->numOutputChannels; }
+
+  if (initStatesFlag) {
+    int i, j, k;
+
+    for (i = 0; i < self->numM2rows; i++) {
+      for (j = 0; j < self->numVChannels; j++) {
+        for (k = 0; k < MAX_PARAMETER_BANDS; k++) {
+          self->M2Real__FDK[i][j][k] = FL2FXCONST_DBL(0);
+          self->M2RealPrev__FDK[i][j][k] = FL2FXCONST_DBL(0);
+        }
+      }
+    }
+  }
+
+  return err;
+}
diff --git a/fdk-aac/libSACdec/src/sac_calcM1andM2.h b/fdk-aac/libSACdec/src/sac_calcM1andM2.h
new file mode 100644
index 0000000..996238d
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_calcM1andM2.h
@@ -0,0 +1,129 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec M1 and M2 calculation
+
+*******************************************************************************/
+
+/* sa_calcM1andM2.h */
+
+#ifndef SAC_CALCM1ANDM2_H
+#define SAC_CALCM1ANDM2_H
+
+#include "sac_dec.h"
+
+#define SCALE_PARAM_M1 3
+
+/* Scaling of M2 matrix, but only for binaural upmix type. */
+#define SCALE_PARAM_CALC_M2 (3)
+#define SCALE_PARAM_M2_515X (3)
+#define SCALE_PARAM_M2_525 (SCALE_PARAM_M1 + HRG_SF + 1 - SCALE_PARAM_CALC_M2)
+#define SCALE_PARAM_M2_212_PRED (3)
+/* Scaling of spectral data after applying M2 matrix, but only for binaural
+   upmix type Scaling is compensated later in synthesis qmf filterbank */
+#define SCALE_DATA_APPLY_M2 (1)
+
+SACDEC_ERROR initM1andM2(spatialDec* self, int initStatesFlag,
+                         int configChanged);
+
+int SpatialDecGetResidualIndex(spatialDec* self, int row);
+
+SACDEC_ERROR SpatialDecCalculateM1andM2(spatialDec* self, int ps,
+                                        const SPATIAL_BS_FRAME* frame);
+
+#endif /* SAC_CALCM1ANDM2_H */
diff --git a/fdk-aac/libSACdec/src/sac_dec.cpp b/fdk-aac/libSACdec/src/sac_dec.cpp
new file mode 100644
index 0000000..4537d6e
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec.cpp
@@ -0,0 +1,1509 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Decoder Library
+
+*******************************************************************************/
+
+#include "sac_dec_errorcodes.h"
+#include "sac_dec.h"
+
+#include "sac_process.h"
+#include "sac_bitdec.h"
+#include "sac_smoothing.h"
+#include "sac_calcM1andM2.h"
+#include "sac_reshapeBBEnv.h"
+#include "sac_stp.h"
+#include "sac_rom.h"
+
+#include "FDK_decorrelate.h"
+
+#include "FDK_trigFcts.h"
+#include "FDK_matrixCalloc.h"
+
+/* static int pbStrideTable[] = {1, 2, 5, 28}; see sac_rom.cpp */
+
+enum {
+  APPLY_M2_NONE = 0,    /* init value */
+  APPLY_M2 = 1,         /* apply m2 fallback implementation */
+  APPLY_M2_MODE212 = 2, /* apply m2 for 212 mode */
+  APPLY_M2_MODE212_Res_PhaseCoding =
+      3 /* apply m2 for 212 mode with residuals and phase coding */
+};
+
+/******************************************************************************************/
+/* function: FDK_SpatialDecInitDefaultSpatialSpecificConfig */
+/* output:   struct of type SPATIAL_SPECIFIC_CONFIG */
+/* input:    core coder audio object type */
+/* input:    nr of core channels */
+/* input:    sampling rate */
+/* input:    nr of time slots */
+/* input:    decoder level */
+/* input:    flag indicating upmix type blind */
+/*                                                                                        */
+/* returns:  error code */
+/******************************************************************************************/
+int FDK_SpatialDecInitDefaultSpatialSpecificConfig(
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, int coreChannels, int samplingFreq,
+    int nTimeSlots, int decoderLevel, int isBlind) {
+  return SpatialDecDefaultSpecificConfig(pSpatialSpecificConfig, coreCodec,
+                                         samplingFreq, nTimeSlots, decoderLevel,
+                                         isBlind, coreChannels);
+}
+
+/******************************************************************************************/
+/* function: FDK_SpatialDecCompareSpatialSpecificConfigHeader */
+/* input:    2 pointers to a ssc */
+/*                                                                                        */
+/* output:   - */
+/* returns:  error code (0 = equal, <>0 unequal) */
+/******************************************************************************************/
+int FDK_SpatialDecCompareSpatialSpecificConfigHeader(
+    SPATIAL_SPECIFIC_CONFIG *pSsc1, SPATIAL_SPECIFIC_CONFIG *pSsc2) {
+  int result = MPS_OK;
+
+  /* we assume: every bit must be equal */
+  if (FDKmemcmp(pSsc1, pSsc2, sizeof(SPATIAL_SPECIFIC_CONFIG)) != 0) {
+    result = MPS_UNEQUAL_SSC;
+  }
+  return result;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecClearFrameData
+ *******************************************************************************
+
+ Description: Clear/Fake frame data to avoid misconfiguration and allow proper
+              error concealment.
+ Arguments:
+ Input:       self (frame data)
+ Output:      No return value.
+
+*******************************************************************************/
+static void SpatialDecClearFrameData(
+    spatialDec *self, /* Shall be removed */
+    SPATIAL_BS_FRAME *bsFrame, const SACDEC_CREATION_PARAMS *const setup) {
+  int i;
+
+  FDK_ASSERT(self != NULL);
+  FDK_ASSERT(bsFrame != NULL);
+  FDK_ASSERT(setup != NULL);
+
+  /* do not apply shaping tools (GES or STP) */
+  for (i = 0; i < setup->maxNumOutputChannels;
+       i += 1) { /* MAX_OUTPUT_CHANNELS */
+    bsFrame->tempShapeEnableChannelSTP[i] = 0;
+    bsFrame->tempShapeEnableChannelGES[i] = 0;
+  }
+
+  bsFrame->TsdData->bsTsdEnable = 0;
+
+  /* use only 1 parameter set at the end of the frame */
+  bsFrame->numParameterSets = 1;
+  bsFrame->paramSlot[0] = self->timeSlots - 1;
+
+  /* parameter smoothing tool set to off */
+  bsFrame->bsSmoothMode[0] = 0;
+
+  /* reset residual data */
+  {
+    int resQmfBands, resTimeSlots = (1);
+
+    resQmfBands = setup->maxNumQmfBands;
+
+    for (i = 0; i < setup->bProcResidual
+                    ? fMin(setup->maxNumResChannels,
+                           setup->maxNumOttBoxes + setup->maxNumInputChannels)
+                    : 0;
+         i += 1) {
+      for (int j = 0; j < resTimeSlots; j += 1) {
+        for (int k = 0; k < resQmfBands; k += 1) {
+          self->qmfResidualReal__FDK[i][j][k] = FL2FXCONST_DBL(0.0f);
+          self->qmfResidualImag__FDK[i][j][k] = FL2FXCONST_DBL(0.0f);
+        }
+      }
+    }
+  }
+
+  return;
+}
+
+/*******************************************************************************
+ Functionname: FDK_SpatialDecOpen
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+spatialDec *FDK_SpatialDecOpen(const SPATIAL_DEC_CONFIG *config,
+                               int stereoConfigIndex) {
+  int i;
+  int lfSize, hfSize;
+  spatialDec *self = NULL;
+  SACDEC_CREATION_PARAMS setup;
+
+  switch (config->decoderLevel) {
+    case DECODER_LEVEL_0: /* 212 maxNumOutputChannels== 2 */
+      setup.maxNumInputChannels = 1;
+      setup.maxNumOutputChannels = 2;
+      setup.maxNumQmfBands = 64;
+      setup.maxNumXChannels = 2;
+      setup.maxNumVChannels = 2;
+      setup.maxNumDecorChannels = 1;
+      setup.bProcResidual = 1;
+      setup.maxNumResidualChannels = 0;
+      setup.maxNumOttBoxes = 1;
+      setup.maxNumParams = setup.maxNumInputChannels + setup.maxNumOttBoxes;
+      break;
+    default:
+      return NULL;
+  }
+
+  setup.maxNumResChannels = 1;
+
+  {
+    switch (config->maxNumOutputChannels) {
+      case OUTPUT_CHANNELS_2_0:
+        setup.maxNumOutputChannels = fMin(setup.maxNumOutputChannels, 2);
+        break;
+      case OUTPUT_CHANNELS_DEFAULT:
+      default:
+        break;
+    }
+  }
+
+  setup.maxNumHybridBands = SacGetHybridSubbands(setup.maxNumQmfBands);
+
+  switch (config->decoderMode) {
+    case EXT_HQ_ONLY:
+      setup.maxNumCmplxQmfBands = setup.maxNumQmfBands;
+      setup.maxNumCmplxHybBands = setup.maxNumHybridBands;
+      break;
+    default:
+      setup.maxNumCmplxQmfBands = fixMax(PC_NUM_BANDS, setup.maxNumQmfBands);
+      setup.maxNumCmplxHybBands =
+          fixMax(PC_NUM_HYB_BANDS, setup.maxNumHybridBands);
+      break;
+  } /* switch config->decoderMode */
+
+  FDK_ALLOCATE_MEMORY_1D_INT(self, 1, spatialDec, SECT_DATA_L2)
+
+  self->createParams = setup;
+
+  FDK_ALLOCATE_MEMORY_1D(self->param2hyb, MAX_PARAMETER_BANDS + 1, int)
+
+  FDK_ALLOCATE_MEMORY_1D(self->numOttBands, setup.maxNumOttBoxes, int)
+
+  /* allocate arrays */
+
+  FDK_ALLOCATE_MEMORY_1D(self->smgTime, MAX_PARAMETER_SETS, int)
+  FDK_ALLOCATE_MEMORY_2D(self->smgData, MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS,
+                         UCHAR)
+
+  FDK_ALLOCATE_MEMORY_3D(self->ottCLD__FDK, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_3D(self->ottICC__FDK, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_3D(self->ottIPD__FDK, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+
+  /* Last parameters from prev frame */
+  FDK_ALLOCATE_MEMORY_2D(self->ottCLDidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_2D(self->ottICCidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_3D(self->ottICCdiffidx, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_2D(self->ottIPDidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_2D(self->arbdmxGainIdxPrev, setup.maxNumInputChannels,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_2D(self->cmpOttCLDidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_2D(self->cmpOttICCidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_3D(self->outIdxData, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+
+  FDK_ALLOCATE_MEMORY_3D(self->arbdmxGain__FDK, setup.maxNumInputChannels,
+                         MAX_PARAMETER_SETS, MAX_PARAMETER_BANDS, SCHAR)
+  FDK_ALLOCATE_MEMORY_1D(self->arbdmxAlpha__FDK, setup.maxNumInputChannels,
+                         FIXP_DBL)
+  FDK_ALLOCATE_MEMORY_1D(self->arbdmxAlphaPrev__FDK, setup.maxNumInputChannels,
+                         FIXP_DBL)
+  FDK_ALLOCATE_MEMORY_2D(self->cmpArbdmxGainIdxPrev, setup.maxNumInputChannels,
+                         MAX_PARAMETER_BANDS, SCHAR)
+
+  FDK_ALLOCATE_MEMORY_2D(self->cmpOttIPDidxPrev, setup.maxNumOttBoxes,
+                         MAX_PARAMETER_BANDS, SCHAR)
+
+  FDK_ALLOCATE_MEMORY_3D_INT(self->M2Real__FDK, setup.maxNumOutputChannels,
+                             setup.maxNumVChannels, MAX_PARAMETER_BANDS,
+                             FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_3D(self->M2Imag__FDK, setup.maxNumOutputChannels,
+                         setup.maxNumVChannels, MAX_PARAMETER_BANDS, FIXP_DBL)
+
+  FDK_ALLOCATE_MEMORY_3D_INT(self->M2RealPrev__FDK, setup.maxNumOutputChannels,
+                             setup.maxNumVChannels, MAX_PARAMETER_BANDS,
+                             FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_3D(self->M2ImagPrev__FDK, setup.maxNumOutputChannels,
+                         setup.maxNumVChannels, MAX_PARAMETER_BANDS, FIXP_DBL)
+
+  FDK_ALLOCATE_MEMORY_2D_INT_ALIGNED(
+      self->qmfInputReal__FDK, setup.maxNumInputChannels, setup.maxNumQmfBands,
+      FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_2D_INT_ALIGNED(
+      self->qmfInputImag__FDK, setup.maxNumInputChannels,
+      setup.maxNumCmplxQmfBands, FIXP_DBL, SECT_DATA_L2)
+
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybInputReal__FDK, setup.maxNumInputChannels,
+                             setup.maxNumHybridBands, FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybInputImag__FDK, setup.maxNumInputChannels,
+                             setup.maxNumCmplxHybBands, FIXP_DBL, SECT_DATA_L2)
+
+  if (setup.bProcResidual) {
+    FDK_ALLOCATE_MEMORY_1D(self->qmfResidualReal__FDK, setup.maxNumResChannels,
+                           FIXP_DBL **)
+    FDK_ALLOCATE_MEMORY_1D(self->qmfResidualImag__FDK, setup.maxNumResChannels,
+                           FIXP_DBL **)
+
+    FDK_ALLOCATE_MEMORY_1D(self->hybResidualReal__FDK, setup.maxNumResChannels,
+                           FIXP_DBL *)
+    FDK_ALLOCATE_MEMORY_1D(self->hybResidualImag__FDK, setup.maxNumResChannels,
+                           FIXP_DBL *)
+
+    for (i = 0; i < setup.maxNumResChannels; i++) {
+      int resQmfBands = (config->decoderMode == EXT_LP_ONLY)
+                            ? PC_NUM_BANDS
+                            : setup.maxNumQmfBands;
+      int resHybBands = (config->decoderMode == EXT_LP_ONLY)
+                            ? PC_NUM_HYB_BANDS
+                            : setup.maxNumHybridBands;
+      /* Alignment is needed for USAC residuals because QMF analysis directly
+       * writes to this buffer. */
+      FDK_ALLOCATE_MEMORY_2D_INT_ALIGNED(self->qmfResidualReal__FDK[i], (1),
+                                         resQmfBands, FIXP_DBL, SECT_DATA_L1)
+      FDK_ALLOCATE_MEMORY_2D_INT_ALIGNED(self->qmfResidualImag__FDK[i], (1),
+                                         resQmfBands, FIXP_DBL, SECT_DATA_L1)
+
+      FDK_ALLOCATE_MEMORY_1D(self->hybResidualReal__FDK[i],
+                             setup.maxNumHybridBands, FIXP_DBL)
+      FDK_ALLOCATE_MEMORY_1D(self->hybResidualImag__FDK[i], resHybBands,
+                             FIXP_DBL)
+    }
+  } /* if (setup.bProcResidual) */
+
+  FDK_ALLOCATE_MEMORY_2D_INT(self->wReal__FDK, setup.maxNumVChannels,
+                             setup.maxNumHybridBands, FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_2D_INT(self->wImag__FDK, setup.maxNumVChannels,
+                             setup.maxNumCmplxHybBands, FIXP_DBL, SECT_DATA_L2)
+
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybOutputRealDry__FDK,
+                             setup.maxNumOutputChannels,
+                             setup.maxNumHybridBands, FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybOutputImagDry__FDK,
+                             setup.maxNumOutputChannels,
+                             setup.maxNumCmplxHybBands, FIXP_DBL, SECT_DATA_L2)
+
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybOutputRealWet__FDK,
+                             setup.maxNumOutputChannels,
+                             setup.maxNumHybridBands, FIXP_DBL, SECT_DATA_L2)
+  FDK_ALLOCATE_MEMORY_2D_INT(self->hybOutputImagWet__FDK,
+                             setup.maxNumOutputChannels,
+                             setup.maxNumCmplxHybBands, FIXP_DBL, SECT_DATA_L2)
+
+  FDK_ALLOCATE_MEMORY_1D(self->hybridSynthesis, setup.maxNumOutputChannels,
+                         FDK_SYN_HYB_FILTER)
+
+  FDK_ALLOCATE_MEMORY_1D(
+      self->hybridAnalysis,
+      setup.bProcResidual ? setup.maxNumInputChannels + setup.maxNumResChannels
+                          : setup.maxNumInputChannels,
+      FDK_ANA_HYB_FILTER)
+
+  lfSize = 2 * BUFFER_LEN_LF * MAX_QMF_BANDS_TO_HYBRID;
+  {
+    hfSize =
+        BUFFER_LEN_HF * ((setup.maxNumQmfBands - MAX_QMF_BANDS_TO_HYBRID) +
+                         (setup.maxNumCmplxQmfBands - MAX_QMF_BANDS_TO_HYBRID));
+  }
+
+  FDK_ALLOCATE_MEMORY_2D_INT(self->pHybridAnaStatesLFdmx,
+                             setup.maxNumInputChannels, lfSize, FIXP_DBL,
+                             SECT_DATA_L2) {
+    FDK_ALLOCATE_MEMORY_2D(self->pHybridAnaStatesHFdmx,
+                           setup.maxNumInputChannels, hfSize, FIXP_DBL)
+  }
+
+  for (i = 0; i < setup.maxNumInputChannels; i++) {
+    FIXP_DBL *pHybridAnaStatesHFdmx;
+
+    pHybridAnaStatesHFdmx = self->pHybridAnaStatesHFdmx[i];
+
+    FDKhybridAnalysisOpen(&self->hybridAnalysis[i],
+                          self->pHybridAnaStatesLFdmx[i],
+                          lfSize * sizeof(FIXP_DBL), pHybridAnaStatesHFdmx,
+                          hfSize * sizeof(FIXP_DBL));
+  }
+  if (setup.bProcResidual) {
+    lfSize = 2 * BUFFER_LEN_LF * MAX_QMF_BANDS_TO_HYBRID;
+    hfSize = BUFFER_LEN_HF *
+             ((((config->decoderMode == EXT_LP_ONLY) ? PC_NUM_BANDS
+                                                     : setup.maxNumQmfBands) -
+               MAX_QMF_BANDS_TO_HYBRID) +
+              (setup.maxNumCmplxQmfBands - MAX_QMF_BANDS_TO_HYBRID));
+
+    FDK_ALLOCATE_MEMORY_2D_INT(self->pHybridAnaStatesLFres,
+                               setup.maxNumResChannels, lfSize, FIXP_DBL,
+                               SECT_DATA_L2)
+    FDK_ALLOCATE_MEMORY_2D(self->pHybridAnaStatesHFres, setup.maxNumResChannels,
+                           hfSize, FIXP_DBL)
+
+    for (i = setup.maxNumInputChannels;
+         i < (setup.maxNumInputChannels + setup.maxNumResChannels); i++) {
+      FDKhybridAnalysisOpen(
+          &self->hybridAnalysis[i],
+          self->pHybridAnaStatesLFres[i - setup.maxNumInputChannels],
+          lfSize * sizeof(FIXP_DBL),
+          self->pHybridAnaStatesHFres[i - setup.maxNumInputChannels],
+          hfSize * sizeof(FIXP_DBL));
+    }
+  }
+
+  FDK_ALLOCATE_MEMORY_1D(self->smoothState, 1, SMOOTHING_STATE)
+  FDK_ALLOCATE_MEMORY_1D(self->reshapeBBEnvState, 1, RESHAPE_BBENV_STATE)
+
+  FDK_ALLOCATE_MEMORY_1D(self->apDecor, setup.maxNumDecorChannels, DECORR_DEC)
+  FDK_ALLOCATE_MEMORY_2D_INT(self->pDecorBufferCplx, setup.maxNumDecorChannels,
+                             (2 * ((825) + (373))), FIXP_DBL, SECT_DATA_L2)
+
+  for (i = 0; i < setup.maxNumDecorChannels; i++) {
+    if (FDKdecorrelateOpen(&self->apDecor[i], self->pDecorBufferCplx[i],
+                           (2 * ((825) + (373))))) {
+      goto bail;
+    }
+  }
+
+  if (subbandTPCreate(&self->hStpDec) != MPS_OK) {
+    goto bail;
+  }
+
+  /* save general decoder configuration */
+  self->decoderLevel = config->decoderLevel;
+  self->decoderMode = config->decoderMode;
+  self->binauralMode = config->binauralMode;
+
+  /* preinitialize configuration */
+  self->partiallyComplex = (config->decoderMode != EXT_HQ_ONLY) ? 1 : 0;
+
+  /* Set to default state */
+  SpatialDecConcealment_Init(&self->concealInfo, MPEGS_CONCEAL_RESET_ALL);
+
+  /* Everything is fine so return the handle */
+  return self;
+
+bail:
+  /* Collector for all errors.
+     Deallocate all memory and return a invalid handle. */
+  FDK_SpatialDecClose(self);
+
+  return NULL;
+}
+
+/*******************************************************************************
+ Functionname: isValidConfig
+ *******************************************************************************
+
+ Description: Validate if configuration is supported in present instance
+
+ Arguments:
+
+ Return: 1: all okay
+         0: configuration not supported
+*******************************************************************************/
+static int isValidConfig(spatialDec const *const self,
+                         const SPATIAL_DEC_UPMIX_TYPE upmixType,
+                         SPATIALDEC_PARAM const *const pUserParams,
+                         const AUDIO_OBJECT_TYPE coreAot) {
+  UPMIXTYPE nUpmixType;
+
+  FDK_ASSERT(self != NULL);
+  FDK_ASSERT(pUserParams != NULL);
+
+  nUpmixType = (UPMIXTYPE)upmixType;
+
+  switch (nUpmixType) {
+    case UPMIXTYPE_BYPASS: /* UPMIX_TYPE_BYPASS */
+      break;
+    case UPMIXTYPE_NORMAL: /* UPMIX_TYPE_NORMAL */
+      break;
+    default:
+      return 0; /* unsupported upmixType */
+  }
+
+  return 1; /* upmixType supported */
+}
+
+static SACDEC_ERROR CheckLevelTreeUpmixType(
+    const SACDEC_CREATION_PARAMS *const pCreateParams,
+    const SPATIAL_SPECIFIC_CONFIG *const pSsc, const int decoderLevel,
+    const UPMIXTYPE upmixType) {
+  SACDEC_ERROR err = MPS_OK;
+  int nOutputChannels, treeConfig;
+
+  FDK_ASSERT(pCreateParams != NULL);
+  FDK_ASSERT(pSsc != NULL);
+
+  treeConfig = pSsc->treeConfig;
+
+  switch (decoderLevel) {
+    case 0: {
+      if (treeConfig != SPATIALDEC_MODE_RSVD7) {
+        err = MPS_INVALID_TREECONFIG;
+        goto bail;
+      }
+      break;
+    }
+    default:
+      err = MPS_INVALID_PARAMETER /* MPS_UNIMPLEMENTED */;
+      goto bail;
+  }
+
+  switch (upmixType) {
+    case UPMIXTYPE_BYPASS:
+      nOutputChannels = pSsc->nInputChannels;
+      break;
+    default:
+      nOutputChannels = pSsc->nOutputChannels;
+      break;
+  }
+
+  /* Is sufficient memory allocated. */
+  if ((pSsc->nInputChannels > pCreateParams->maxNumInputChannels) ||
+      (nOutputChannels > pCreateParams->maxNumOutputChannels) ||
+      (pSsc->nOttBoxes > pCreateParams->maxNumOttBoxes)) {
+    err = MPS_INVALID_PARAMETER;
+  }
+
+bail:
+  return err;
+}
+
+void SpatialDecInitParserContext(spatialDec *self) {
+  int i, j;
+
+  for (i = 0; i < self->createParams.maxNumOttBoxes; i += 1) {
+    for (j = 0; j < MAX_PARAMETER_BANDS; j++) {
+      self->ottCLDidxPrev[i][j] = 0;
+      self->ottICCidxPrev[i][j] = 0;
+      self->cmpOttCLDidxPrev[i][j] = 0;
+      self->cmpOttICCidxPrev[i][j] = 0;
+    }
+  }
+  for (i = 0; i < self->createParams.maxNumInputChannels; i++) {
+    for (j = 0; j < MAX_PARAMETER_BANDS; j++) {
+      self->arbdmxGainIdxPrev[i][j] = 0;
+      self->cmpArbdmxGainIdxPrev[i][j] = 0;
+    }
+  }
+}
+
+/*******************************************************************************
+ Functionname: FDK_SpatialDecInit
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+
+SACDEC_ERROR FDK_SpatialDecInit(spatialDec *self, SPATIAL_BS_FRAME *frame,
+                                SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+                                int nQmfBands,
+                                SPATIAL_DEC_UPMIX_TYPE const upmixType,
+                                SPATIALDEC_PARAM *pUserParams, UINT initFlags) {
+  SACDEC_ERROR err = MPS_OK;
+  int nCh, i, j, k;
+  int maxQmfBands;
+  int bypassMode = 0;
+
+  self->useFDreverb = 0;
+
+  /* check configuration parameter */
+  if (!isValidConfig(self, upmixType, pUserParams,
+                     pSpatialSpecificConfig->coreCodec)) {
+    return MPS_INVALID_PARAMETER;
+  }
+
+  /* check tree configuration */
+  err = CheckLevelTreeUpmixType(&self->createParams, pSpatialSpecificConfig,
+                                self->decoderLevel, (UPMIXTYPE)upmixType);
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+  /* Store and update instance after all checks passed successfully: */
+  self->upmixType = (UPMIXTYPE)upmixType;
+
+  if (initFlags & MPEGS_INIT_PARAMS_ERROR_CONCEALMENT) { /* At least one error
+                                                            concealment
+                                                            parameter changed */
+    err = SpatialDecConcealment_SetParam(
+        &self->concealInfo, SAC_DEC_CONCEAL_METHOD, pUserParams->concealMethod);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+    err = SpatialDecConcealment_SetParam(&self->concealInfo,
+                                         SAC_DEC_CONCEAL_NUM_KEEP_FRAMES,
+                                         pUserParams->concealNumKeepFrames);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+    err = SpatialDecConcealment_SetParam(
+        &self->concealInfo, SAC_DEC_CONCEAL_FADE_OUT_SLOPE_LENGTH,
+        pUserParams->concealFadeOutSlopeLength);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+    err = SpatialDecConcealment_SetParam(&self->concealInfo,
+                                         SAC_DEC_CONCEAL_FADE_IN_SLOPE_LENGTH,
+                                         pUserParams->concealFadeInSlopeLength);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+    err = SpatialDecConcealment_SetParam(&self->concealInfo,
+                                         SAC_DEC_CONCEAL_NUM_RELEASE_FRAMES,
+                                         pUserParams->concealNumReleaseFrames);
+    if (err != MPS_OK) {
+      goto bail;
+    }
+  }
+
+  if (initFlags &
+      MPEGS_INIT_STATES_ERROR_CONCEALMENT) { /* Set to default state */
+    SpatialDecConcealment_Init(&self->concealInfo, MPEGS_CONCEAL_RESET_STATE);
+  }
+
+  /* determine bypass mode */
+  bypassMode |= pUserParams->bypassMode;
+  bypassMode |= ((self->upmixType == UPMIXTYPE_BYPASS) ? 1 : 0);
+
+  /* static decoder scale depends on number of qmf bands */
+  switch (nQmfBands) {
+    case 16:
+    case 24:
+    case 32:
+      self->staticDecScale = 21;
+      break;
+    case 64:
+      self->staticDecScale = 22;
+      break;
+    default:
+      return MPS_INVALID_PARAMETER;
+  }
+
+  self->numParameterSetsPrev = 1;
+
+  self->qmfBands = nQmfBands;
+  /* self->hybridBands will be updated in SpatialDecDecodeHeader() below. */
+
+  self->bShareDelayWithSBR = 0;
+
+  err = SpatialDecDecodeHeader(self, pSpatialSpecificConfig);
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+  self->stereoConfigIndex = pSpatialSpecificConfig->stereoConfigIndex;
+
+  if (initFlags & MPEGS_INIT_STATES_ANA_QMF_FILTER) {
+    self->qmfInputDelayBufPos = 0;
+    self->pc_filterdelay = 1; /* Division by 0 not possible */
+  }
+
+  maxQmfBands = self->qmfBands;
+
+  /* init residual decoder */
+
+  /* init tonality smoothing */
+  if (initFlags & MPEGS_INIT_STATES_PARAM) {
+    initParameterSmoothing(self);
+  }
+
+  /* init GES */
+  initBBEnv(self, (initFlags & MPEGS_INIT_STATES_GES) ? 1 : 0);
+
+  /* Clip protection is applied only for normal processing. */
+  if (!isTwoChMode(self->upmixType) && !bypassMode) {
+    self->staticDecScale += self->clipProtectGainSF__FDK;
+  }
+
+  {
+    UINT flags = 0;
+    INT initStatesFlag = (initFlags & MPEGS_INIT_STATES_ANA_QMF_FILTER) ? 1 : 0;
+    INT useLdFilter =
+        (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD) ? 1 : 0;
+
+    flags = self->pQmfDomain->globalConf.flags_requested;
+    flags &= (~(UINT)QMF_FLAG_LP);
+
+    if (initStatesFlag)
+      flags &= ~QMF_FLAG_KEEP_STATES;
+    else
+      flags |= QMF_FLAG_KEEP_STATES;
+
+    if (useLdFilter)
+      flags |= QMF_FLAG_MPSLDFB;
+    else
+      flags &= ~QMF_FLAG_MPSLDFB;
+
+    self->pQmfDomain->globalConf.flags_requested = flags;
+    FDK_QmfDomain_Configure(self->pQmfDomain);
+
+    /* output scaling */
+    for (nCh = 0; nCh < self->numOutputChannelsAT; nCh++) {
+      int outputScale = 0, outputGain_e = 0, scale = 0;
+      FIXP_DBL outputGain_m = getChGain(self, nCh, &outputGain_e);
+
+      if (!isTwoChMode(self->upmixType) && !bypassMode) {
+        outputScale +=
+            self->clipProtectGainSF__FDK; /* consider clip protection scaling at
+                                             synthesis qmf */
+      }
+
+      scale = outputScale;
+
+      qmfChangeOutScalefactor(&self->pQmfDomain->QmfDomainOut[nCh].fb, scale);
+      qmfChangeOutGain(&self->pQmfDomain->QmfDomainOut[nCh].fb, outputGain_m,
+                       outputGain_e);
+    }
+  }
+
+  for (nCh = 0; nCh < self->numOutputChannelsAT; nCh++) {
+    FDKhybridSynthesisInit(&self->hybridSynthesis[nCh], THREE_TO_TEN,
+                           self->qmfBands, maxQmfBands);
+  }
+
+  /* for input, residual channels and arbitrary down-mix residual channels */
+  for (nCh = 0; nCh < self->createParams.maxNumInputChannels; nCh++) {
+    FDKhybridAnalysisInit(
+        &self->hybridAnalysis[nCh], THREE_TO_TEN, self->qmfBands, maxQmfBands,
+        (initFlags & MPEGS_INIT_STATES_ANA_HYB_FILTER) ? 1 : 0);
+  }
+  for (; nCh < (self->createParams.bProcResidual
+                    ? (self->createParams.maxNumInputChannels +
+                       self->createParams.maxNumResChannels)
+                    : self->createParams.maxNumInputChannels);
+       nCh++) {
+    FDKhybridAnalysisInit(&self->hybridAnalysis[nCh], THREE_TO_TEN, maxQmfBands,
+                          maxQmfBands, 0);
+  }
+
+  {
+    for (k = 0; k < self->numDecorSignals; k++) {
+      int errCode, idec;
+      FDK_DECORR_TYPE decorrType = DECORR_PS;
+      decorrType = DECORR_LD;
+      if (self->pConfigCurrent->syntaxFlags &
+          (SACDEC_SYNTAX_USAC | SACDEC_SYNTAX_RSVD50)) {
+        decorrType =
+            ((self->treeConfig == TREE_212) && (self->decorrType == DECORR_PS))
+                ? DECORR_PS
+                : DECORR_USAC;
+      }
+      {
+        idec = k;
+        if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD) {
+          if (self->treeConfig == TREE_212 && k == 0) {
+            idec = 2;
+          }
+        }
+      }
+      errCode = FDKdecorrelateInit(
+          &self->apDecor[k], self->hybridBands, decorrType, DUCKER_AUTOMATIC,
+          self->decorrConfig, idec, 0, /* self->partiallyComplex */
+          0, 0,                        /* isLegacyPS */
+          (initFlags & MPEGS_INIT_STATES_DECORRELATOR) ? 1 : 0);
+      if (errCode) return MPS_NOTOK;
+    }
+  } /* !self->partiallyComplex */
+
+  err = initM1andM2(self, (initFlags & MPEGS_INIT_STATES_M1M2) ? 1 : 0,
+                    (initFlags & MPEGS_INIT_CONFIG) ? 1 : 0);
+  if (err != MPS_OK) return err;
+
+  /* Initialization of previous frame data */
+  if (initFlags & MPEGS_INIT_STATES_PARAM) {
+    for (i = 0; i < self->createParams.maxNumOttBoxes; i += 1) {
+      /* reset icc diff data */
+      for (k = 0; k < MAX_PARAMETER_SETS; k += 1) {
+        for (j = 0; j < MAX_PARAMETER_BANDS; j += 1) {
+          self->ottICCdiffidx[i][k][j] = 0;
+        }
+      }
+    }
+    /* Parameter Smoothing */
+    /* robustness: init with one of the values of smgTimeTable[] = {64, 128,
+       256, 512} to avoid division by zero in calcFilterCoeff__FDK() */
+    self->smoothState->prevSmgTime = smgTimeTable[2]; /* == 256 */
+    FDKmemclear(self->smoothState->prevSmgData,
+                MAX_PARAMETER_BANDS * sizeof(UCHAR));
+    FDKmemclear(self->smoothState->opdLeftState__FDK,
+                MAX_PARAMETER_BANDS * sizeof(FIXP_DBL));
+    FDKmemclear(self->smoothState->opdRightState__FDK,
+                MAX_PARAMETER_BANDS * sizeof(FIXP_DBL));
+  }
+
+  self->prevTimeSlot = -1;
+  self->curTimeSlot =
+      MAX_TIME_SLOTS + 1; /* Initialize with a invalid value to trigger
+                             concealment if first frame has no valid data. */
+  self->curPs = 0;
+
+  subbandTPInit(self->hStpDec);
+
+bail:
+  return err;
+}
+
+void SpatialDecChannelProperties(spatialDec *self,
+                                 AUDIO_CHANNEL_TYPE channelType[],
+                                 UCHAR channelIndices[],
+                                 const FDK_channelMapDescr *const mapDescr) {
+  if ((self == NULL) || (channelType == NULL) || (channelIndices == NULL) ||
+      (mapDescr == NULL)) {
+    return; /* no extern buffer to be filled */
+  }
+
+  if (self->numOutputChannelsAT !=
+      treePropertyTable[self->treeConfig].numOutputChannels) {
+    int ch;
+    /* Declare all channels to be front channels: */
+    for (ch = 0; ch < self->numOutputChannelsAT; ch += 1) {
+      channelType[ch] = ACT_FRONT;
+      channelIndices[ch] = ch;
+    }
+  } else {
+    /* ISO/IEC FDIS 23003-1:2006(E), page 46, Table 40 bsTreeConfig */
+    switch (self->treeConfig) {
+      case TREE_212:
+        channelType[0] = ACT_FRONT;
+        channelIndices[0] = 0;
+        channelType[1] = ACT_FRONT;
+        channelIndices[1] = 1;
+        break;
+      default:;
+    }
+  }
+}
+
+/*******************************************************************************
+ Functionname: FDK_SpatialDecClose
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+
+void FDK_SpatialDecClose(spatialDec *self) {
+  if (self) {
+    int k;
+
+    if (self->apDecor != NULL) {
+      for (k = 0; k < self->createParams.maxNumDecorChannels; k++) {
+        FDKdecorrelateClose(&(self->apDecor[k]));
+      }
+      FDK_FREE_MEMORY_1D(self->apDecor);
+    }
+    if (self->pDecorBufferCplx != NULL) {
+      FDK_FREE_MEMORY_2D(self->pDecorBufferCplx);
+    }
+
+    subbandTPDestroy(&self->hStpDec);
+
+    FDK_FREE_MEMORY_1D(self->reshapeBBEnvState);
+    FDK_FREE_MEMORY_1D(self->smoothState);
+
+    FDK_FREE_MEMORY_2D(self->pHybridAnaStatesLFdmx);
+    FDK_FREE_MEMORY_2D(self->pHybridAnaStatesHFdmx);
+    FDK_FREE_MEMORY_2D(self->pHybridAnaStatesLFres);
+    FDK_FREE_MEMORY_2D(self->pHybridAnaStatesHFres);
+    FDK_FREE_MEMORY_1D(self->hybridAnalysis);
+
+    FDK_FREE_MEMORY_1D(self->hybridSynthesis);
+
+    /* The time buffer is passed to the decoder from outside to avoid copying
+     * (zero copy). */
+    /* FDK_FREE_MEMORY_2D(self->timeOut__FDK); */
+
+    FDK_FREE_MEMORY_2D(self->hybOutputImagWet__FDK);
+    FDK_FREE_MEMORY_2D(self->hybOutputRealWet__FDK);
+
+    FDK_FREE_MEMORY_2D(self->hybOutputImagDry__FDK);
+    FDK_FREE_MEMORY_2D(self->hybOutputRealDry__FDK);
+
+    FDK_FREE_MEMORY_2D(self->wImag__FDK);
+    FDK_FREE_MEMORY_2D(self->wReal__FDK);
+
+    if (self->createParams.bProcResidual) {
+      int i;
+
+      for (i = 0; i < self->createParams.maxNumResChannels; i++) {
+        if (self->hybResidualImag__FDK != NULL)
+          FDK_FREE_MEMORY_1D(self->hybResidualImag__FDK[i]);
+        if (self->hybResidualReal__FDK != NULL)
+          FDK_FREE_MEMORY_1D(self->hybResidualReal__FDK[i]);
+        if (self->qmfResidualImag__FDK != NULL)
+          FDK_FREE_MEMORY_2D_ALIGNED(self->qmfResidualImag__FDK[i]);
+        if (self->qmfResidualReal__FDK != NULL)
+          FDK_FREE_MEMORY_2D_ALIGNED(self->qmfResidualReal__FDK[i]);
+      }
+
+      FDK_FREE_MEMORY_1D(self->hybResidualImag__FDK);
+      FDK_FREE_MEMORY_1D(self->hybResidualReal__FDK);
+
+      FDK_FREE_MEMORY_1D(self->qmfResidualImag__FDK);
+      FDK_FREE_MEMORY_1D(self->qmfResidualReal__FDK);
+
+    } /* self->createParams.bProcResidual */
+
+    FDK_FREE_MEMORY_2D(self->hybInputImag__FDK);
+    FDK_FREE_MEMORY_2D(self->hybInputReal__FDK);
+
+    FDK_FREE_MEMORY_2D_ALIGNED(self->qmfInputImag__FDK);
+    FDK_FREE_MEMORY_2D_ALIGNED(self->qmfInputReal__FDK);
+
+    FDK_FREE_MEMORY_3D(self->M2ImagPrev__FDK);
+
+    FDK_FREE_MEMORY_3D(self->M2RealPrev__FDK);
+
+    FDK_FREE_MEMORY_3D(self->M2Imag__FDK);
+
+    FDK_FREE_MEMORY_3D(self->M2Real__FDK);
+
+    FDK_FREE_MEMORY_1D(self->arbdmxAlphaPrev__FDK);
+    FDK_FREE_MEMORY_1D(self->arbdmxAlpha__FDK);
+
+    FDK_FREE_MEMORY_3D(self->arbdmxGain__FDK);
+
+    FDK_FREE_MEMORY_3D(self->ottIPD__FDK);
+    FDK_FREE_MEMORY_3D(self->ottICC__FDK);
+    FDK_FREE_MEMORY_3D(self->ottCLD__FDK);
+
+    /* Last parameters from prev frame */
+    FDK_FREE_MEMORY_2D(self->ottCLDidxPrev);
+    FDK_FREE_MEMORY_2D(self->ottICCidxPrev);
+    FDK_FREE_MEMORY_3D(self->ottICCdiffidx);
+    FDK_FREE_MEMORY_2D(self->ottIPDidxPrev);
+    FDK_FREE_MEMORY_2D(self->arbdmxGainIdxPrev);
+
+    FDK_FREE_MEMORY_2D(self->cmpOttCLDidxPrev);
+    FDK_FREE_MEMORY_2D(self->cmpOttICCidxPrev);
+    FDK_FREE_MEMORY_3D(self->outIdxData);
+    FDK_FREE_MEMORY_2D(self->cmpOttIPDidxPrev);
+    FDK_FREE_MEMORY_2D(self->cmpArbdmxGainIdxPrev);
+
+    FDK_FREE_MEMORY_2D(self->smgData);
+    FDK_FREE_MEMORY_1D(self->smgTime);
+
+    FDK_FREE_MEMORY_1D(self->numOttBands);
+
+    FDK_FREE_MEMORY_1D(self->param2hyb);
+
+    FDK_FREE_MEMORY_1D(self);
+  }
+
+  return;
+}
+
+/**
+ * \brief Apply Surround bypass buffer copies
+ * \param self spatialDec handle
+ * \param hybInputReal
+ * \param hybInputImag
+ * \param hybOutputReal
+ * \param hybOutputImag
+ * \param numInputChannels amount if input channels available in hybInputReal
+ * and hybInputImag, which may differ from self->numInputChannels.
+ */
+static void SpatialDecApplyBypass(spatialDec *self, FIXP_DBL **hybInputReal,
+                                  FIXP_DBL **hybInputImag,
+                                  FIXP_DBL **hybOutputReal,
+                                  FIXP_DBL **hybOutputImag,
+                                  const int numInputChannels) {
+  int complexHybBands;
+
+  complexHybBands = self->hybridBands;
+
+  {
+    int ch;
+    int rf = -1, lf = -1, cf = -1; /* Right Front, Left Front, Center Front */
+
+    /* Determine output channel indices according to tree config */
+    switch (self->treeConfig) {
+      case TREE_212: /* 212  */
+        lf = 0;
+        rf = 1;
+        break;
+      default:;
+    }
+
+    /* Note: numInputChannels might not match the tree config ! */
+    switch (numInputChannels) {
+      case 1:
+        if (cf > 0) {
+          FDKmemcpy(hybOutputReal[cf], hybInputReal[0],
+                    self->hybridBands * sizeof(FIXP_DBL));
+          FDKmemcpy(hybOutputImag[cf], hybInputImag[0],
+                    complexHybBands * sizeof(FIXP_DBL));
+        } else {
+          FDKmemcpy(hybOutputReal[lf], hybInputReal[0],
+                    self->hybridBands * sizeof(FIXP_DBL));
+          FDKmemcpy(hybOutputReal[rf], hybInputReal[0],
+                    self->hybridBands * sizeof(FIXP_DBL));
+          FDKmemcpy(hybOutputImag[lf], hybInputImag[0],
+                    complexHybBands * sizeof(FIXP_DBL));
+          FDKmemcpy(hybOutputImag[rf], hybInputImag[0],
+                    complexHybBands * sizeof(FIXP_DBL));
+        }
+        break;
+      case 2:
+        FDK_ASSERT(lf != -1);
+        FDK_ASSERT(rf != -1);
+        FDKmemcpy(hybOutputReal[lf], hybInputReal[0],
+                  self->hybridBands * sizeof(FIXP_DBL));
+        FDKmemcpy(hybOutputReal[rf], hybInputReal[1],
+                  self->hybridBands * sizeof(FIXP_DBL));
+        FDKmemcpy(hybOutputImag[lf], hybInputImag[0],
+                  complexHybBands * sizeof(FIXP_DBL));
+        FDKmemcpy(hybOutputImag[rf], hybInputImag[1],
+                  complexHybBands * sizeof(FIXP_DBL));
+        break;
+    }
+    for (ch = 0; ch < self->numOutputChannelsAT; ch++) {
+      if (ch == lf || ch == rf || ch == cf) {
+        continue; /* Skip bypassed channels */
+      }
+      FDKmemclear(hybOutputReal[ch], self->hybridBands * sizeof(FIXP_DBL));
+      FDKmemclear(hybOutputImag[ch], complexHybBands * sizeof(FIXP_DBL));
+    }
+  }
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecApplyParameterSets
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+static SACDEC_ERROR SpatialDecApplyParameterSets(
+    spatialDec *self, const SPATIAL_BS_FRAME *frame, SPATIALDEC_INPUT_MODE mode,
+    PCM_MPS *inData,          /* Time domain input  */
+    FIXP_DBL **qmfInDataReal, /* QMF domain data l/r */
+    FIXP_DBL **qmfInDataImag, /* QMF domain data l/r */
+    UINT nSamples, UINT controlFlags, int numInputChannels,
+    const FDK_channelMapDescr *const mapDescr) {
+  SACDEC_ERROR err = MPS_OK;
+
+  FIXP_SGL alpha;
+
+  int ts;
+  int ch;
+  int hyb;
+
+  int prevSlot = self->prevTimeSlot;
+  int ps = self->curPs;
+  int ts_io = 0; /* i/o dependent slot */
+  int bypassMode = (controlFlags & MPEGS_BYPASSMODE) ? 1 : 0;
+
+  /* Bypass can be triggered by the upmixType, too. */
+  bypassMode |= ((self->upmixType == UPMIXTYPE_BYPASS) ? 1 : 0);
+
+  /*
+   * Decode available slots
+   */
+  for (ts = self->curTimeSlot;
+       ts <= fixMin(self->curTimeSlot + (int)nSamples / self->qmfBands - 1,
+                    self->timeSlots - 1);
+       ts++, ts_io++) {
+    int currSlot = frame->paramSlot[ps];
+
+    /*
+     * Get new parameter set
+     */
+    if (ts == prevSlot + 1) {
+      err = SpatialDecCalculateM1andM2(self, ps,
+                                       frame); /* input: ottCLD, ottICC, ... */
+      /* output: M1param(Real/Imag), M2(Real/Imag) */
+      if (err != MPS_OK) {
+        bypassMode = 1;
+        if (self->errInt == MPS_OK) {
+          /* store internal error befor it gets overwritten */
+          self->errInt = err;
+        }
+        err = MPS_OK;
+      }
+
+      if ((ps == 0) && (self->bOverwriteM1M2prev != 0)) {
+        /* copy matrix entries of M1/M2 of the first parameter set to the
+           previous matrices (of the last frame). This avoids the interpolation
+           of incompatible values. E.g. for residual bands the coefficients are
+           calculated differently compared to non-residual bands.
+         */
+        SpatialDecBufferMatrices(self); /* input: M(1/2)param(Real/Imag) */
+                                        /* output: M(1/2)param(Real/Imag)Prev */
+        self->bOverwriteM1M2prev = 0;
+      }
+
+      SpatialDecSmoothM1andM2(
+          self, frame,
+          ps); /* input: M1param(Real/Imag)(Prev), M2(Real/Imag)(Prev) */
+               /* output: M1param(Real/Imag), M2(Real/Imag) */
+    }
+
+    alpha = FX_DBL2FX_SGL(fDivNorm(ts - prevSlot, currSlot - prevSlot));
+
+    switch (mode) {
+      case INPUTMODE_QMF_SBR:
+        if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD)
+          self->bShareDelayWithSBR = 0; /* We got no hybrid delay */
+        else
+          self->bShareDelayWithSBR = 1;
+        SpatialDecFeedQMF(self, qmfInDataReal, qmfInDataImag, ts_io, bypassMode,
+                          self->qmfInputReal__FDK, self->qmfInputImag__FDK,
+                          self->numInputChannels);
+        break;
+      case INPUTMODE_TIME:
+        self->bShareDelayWithSBR = 0;
+        SpatialDecQMFAnalysis(self, inData, ts_io, bypassMode,
+                              self->qmfInputReal__FDK, self->qmfInputImag__FDK,
+                              self->numInputChannels);
+        break;
+      default:
+        break;
+    }
+
+    if ((self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_USAC) &&
+        self->residualCoding) {
+      int offset;
+      ch = 1;
+
+      offset = self->pQmfDomain->globalConf.nBandsSynthesis *
+               self->pQmfDomain->globalConf.nQmfTimeSlots;
+
+      {
+        const PCM_MPS *inSamples =
+            &inData[ts * self->pQmfDomain->globalConf.nBandsAnalysis];
+
+        CalculateSpaceAnalysisQmf(
+            &self->pQmfDomain->QmfDomainIn[ch].fb, inSamples + (ch * offset),
+            self->qmfResidualReal__FDK[0][0], self->qmfResidualImag__FDK[0][0]);
+
+        if (!isTwoChMode(self->upmixType) && !bypassMode) {
+          int i;
+          FIXP_DBL *RESTRICT self_qmfResidualReal__FDK_0_0 =
+              &self->qmfResidualReal__FDK[0][0][0];
+          FIXP_DBL *RESTRICT self_qmfResidualImag__FDK_0_0 =
+              &self->qmfResidualImag__FDK[0][0][0];
+
+          if ((self->pQmfDomain->globalConf.nBandsAnalysis == 24) &&
+              !(self->stereoConfigIndex == 3)) {
+            for (i = 0; i < self->qmfBands; i++) {
+              self_qmfResidualReal__FDK_0_0[i] =
+                  fMult(self_qmfResidualReal__FDK_0_0[i] << 1,
+                        self->clipProtectGain__FDK);
+              self_qmfResidualImag__FDK_0_0[i] =
+                  fMult(self_qmfResidualImag__FDK_0_0[i] << 1,
+                        self->clipProtectGain__FDK);
+            }
+          } else {
+            for (i = 0; i < self->qmfBands; i++) {
+              self_qmfResidualReal__FDK_0_0[i] = fMult(
+                  self_qmfResidualReal__FDK_0_0[i], self->clipProtectGain__FDK);
+              self_qmfResidualImag__FDK_0_0[i] = fMult(
+                  self_qmfResidualImag__FDK_0_0[i], self->clipProtectGain__FDK);
+            }
+          }
+        }
+      }
+    }
+
+    SpatialDecHybridAnalysis(
+        self, /* input: qmfInput(Real/Imag), qmfResidual(Real/Imag) */
+        self->qmfInputReal__FDK, self->qmfInputImag__FDK,
+        self->hybInputReal__FDK, self->hybInputImag__FDK, ts, numInputChannels);
+
+    if (bypassMode) {
+      SpatialDecApplyBypass(
+          self, self->hybInputReal__FDK, /* input: hybInput(Real/Imag) */
+          self->hybInputImag__FDK,
+          self->hybOutputRealDry__FDK, /* output: hybOutput(Real/Imag)Dry */
+          self->hybOutputImagDry__FDK, numInputChannels);
+    } else /* !bypassMode */
+    {
+      FIXP_DBL *pxReal[MAX_NUM_XCHANNELS] = {NULL};
+      FIXP_DBL *pxImag[MAX_NUM_XCHANNELS] = {NULL};
+
+      SpatialDecCreateX(self,
+                        self->hybInputReal__FDK, /* input: hybInput(Real/Imag),
+                                                    hybResidual(Real/Imag) */
+                        self->hybInputImag__FDK, pxReal, pxImag);
+
+      {
+        SpatialDecApplyM1_CreateW_Mode212(
+            self, frame, pxReal, pxImag,
+            self->wReal__FDK, /* output: w(Real/Imag) */
+            self->wImag__FDK);
+      }
+      if (err != MPS_OK) goto bail;
+
+      int applyM2Config = APPLY_M2_NONE;
+
+      applyM2Config = APPLY_M2;
+      if ((self->pConfigCurrent->syntaxFlags &
+           (SACDEC_SYNTAX_USAC | SACDEC_SYNTAX_RSVD50)) &&
+          (self->tempShapeConfig != 1) && (self->tempShapeConfig != 2)) {
+        if (self->phaseCoding == 3)
+          applyM2Config = APPLY_M2_MODE212_Res_PhaseCoding;
+        else
+          applyM2Config = APPLY_M2_MODE212;
+      }
+
+      switch (applyM2Config) {
+        case APPLY_M2_MODE212: {
+          err = SpatialDecApplyM2_Mode212(
+              self, ps, alpha, self->wReal__FDK, self->wImag__FDK,
+              self->hybOutputRealDry__FDK, self->hybOutputImagDry__FDK);
+        } break;
+        case APPLY_M2_MODE212_Res_PhaseCoding:
+          err = SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(
+              self, ps, alpha, self->wReal__FDK, self->wImag__FDK,
+              self->hybOutputRealDry__FDK, self->hybOutputImagDry__FDK);
+          break;
+        case APPLY_M2:
+          err = SpatialDecApplyM2(
+              self, ps, alpha, self->wReal__FDK, self->wImag__FDK,
+              self->hybOutputRealDry__FDK, self->hybOutputImagDry__FDK,
+              self->hybOutputRealWet__FDK, self->hybOutputImagWet__FDK);
+          break;
+        default:
+          err = MPS_APPLY_M2_ERROR;
+          goto bail;
+      }
+
+      if (err != MPS_OK) goto bail;
+
+      if ((self->tempShapeConfig == 2) && (!isTwoChMode(self->upmixType))) {
+        SpatialDecReshapeBBEnv(self, frame,
+                               ts); /* input: reshapeBBEnvState,
+                                       hybOutput(Real/Imag)(Dry/Wet),
+                                       hybInput(Real/Imag) */
+      }                             /* output: hybOutput(Real/Imag)Dry */
+
+      /* Merge parts of the dry and wet QMF buffers. */
+      if ((self->tempShapeConfig == 1) && (!isTwoChMode(self->upmixType))) {
+        for (ch = 0; ch < self->numOutputChannels; ch++) {
+          for (hyb = 0; hyb < self->tp_hybBandBorder; hyb++) {
+            self->hybOutputRealDry__FDK[ch][hyb] +=
+                self->hybOutputRealWet__FDK[ch][hyb];
+            self->hybOutputImagDry__FDK[ch][hyb] +=
+                self->hybOutputImagWet__FDK[ch][hyb];
+          } /* loop hyb */
+        }   /* loop ch */
+        err = subbandTPApply(
+            self, frame); /* input: hStpDec, hybOutput(Real/Imag)Dry/Wet */
+                          /* output: hStpDec, hybOutput(Real/Imag)Dry */
+        if (err != MPS_OK) goto bail;
+      } /* (self->tempShapeConfig == 1) */
+      else {
+        /* The wet signal is added to the dry signal in applyM2 if GES and STP
+         * are disabled */
+        if ((self->tempShapeConfig == 1) || (self->tempShapeConfig == 2)) {
+          int nHybBands;
+          nHybBands = self->hybridBands;
+
+          for (ch = 0; ch < self->numOutputChannels; ch++) {
+            FIXP_DBL *RESTRICT pRealDry = self->hybOutputRealDry__FDK[ch];
+            FIXP_DBL *RESTRICT pImagDry = self->hybOutputImagDry__FDK[ch];
+            FIXP_DBL *RESTRICT pRealWet = self->hybOutputRealWet__FDK[ch];
+            FIXP_DBL *RESTRICT pImagWet = self->hybOutputImagWet__FDK[ch];
+            for (hyb = 0; hyb < nHybBands; hyb++) {
+              pRealDry[hyb] += pRealWet[hyb];
+              pImagDry[hyb] += pImagWet[hyb];
+            } /* loop hyb */
+            for (; hyb < self->hybridBands; hyb++) {
+              pRealDry[hyb] += pRealWet[hyb];
+            } /* loop hyb */
+          }   /* loop ch */
+        } /* ( self->tempShapeConfig == 1 ) || ( self->tempShapeConfig == 2 ) */
+      }   /* !self->tempShapeConfig == 1 */
+    }     /*  !bypassMode */
+
+    if (self->phaseCoding == 1) {
+      /* only if bsPhaseCoding == 1 and bsResidualCoding == 0 */
+
+      SpatialDecApplyPhase(
+          self, alpha, (ts == currSlot) /* signal the last slot of the set */
+      );
+    }
+
+    /*
+     * Synthesis Filtering
+     */
+
+    err = SpatialDecSynthesis(
+        self, ts_io,
+        self->hybOutputRealDry__FDK, /* input: hybOutput(Real/Imag)Dry */
+        self->hybOutputImagDry__FDK, self->timeOut__FDK, /* output: timeOut */
+        numInputChannels, mapDescr);
+
+    if (err != MPS_OK) goto bail;
+
+    /*
+     * Update parameter buffer
+     */
+    if (ts == currSlot) {
+      SpatialDecBufferMatrices(self); /* input: M(1/2)param(Real/Imag) */
+                                      /* output: M(1/2)param(Real/Imag)Prev */
+
+      prevSlot = currSlot;
+      ps++;
+    } /* if (ts==currSlot) */
+
+  } /* ts loop */
+
+  /*
+   * Save parameter states
+   */
+  self->prevTimeSlot = prevSlot;
+  self->curTimeSlot = ts;
+  self->curPs = ps;
+
+bail:
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecApplyFrame(
+    spatialDec *self,
+    SPATIAL_BS_FRAME *frame, /* parsed frame data to be applied */
+    SPATIALDEC_INPUT_MODE inputMode, PCM_MPS *inData, /* Time domain input  */
+    FIXP_DBL **qmfInDataReal,                         /* QMF domain data l/r */
+    FIXP_DBL **qmfInDataImag,                         /* QMF domain data l/r */
+    PCM_MPS *pcmOutBuf, /* MAX_OUTPUT_CHANNELS*MAX_TIME_SLOTS*NUM_QMF_BANDS] */
+    UINT nSamples, UINT *pControlFlags, int numInputChannels,
+    const FDK_channelMapDescr *const mapDescr) {
+  SACDEC_ERROR err = MPS_OK;
+
+  int fDecAndMapFrameData;
+  int controlFlags;
+
+  FDK_ASSERT(self != NULL);
+  FDK_ASSERT(pControlFlags != NULL);
+  FDK_ASSERT(pcmOutBuf != NULL);
+
+  self->errInt = err; /* Init internal error */
+
+  controlFlags = *pControlFlags;
+
+  if ((self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_USAC) &&
+      (self->stereoConfigIndex > 1)) {
+    numInputChannels =
+        1; /* Do not count residual channel as input channel. It is handled
+              seperately. */
+  }
+
+  /* Check if input amount of channels is consistent */
+  if (numInputChannels != self->numInputChannels) {
+    controlFlags |= MPEGS_CONCEAL;
+    if (numInputChannels > self->createParams.maxNumInputChannels) {
+      return MPS_INVALID_PARAMETER;
+    }
+  }
+
+  self->timeOut__FDK = pcmOutBuf;
+
+  /* Determine local function control flags */
+  fDecAndMapFrameData = frame->newBsData;
+
+  if (((fDecAndMapFrameData ==
+        0) /* assures that conceal flag will not be set for blind mode */
+       && (self->curTimeSlot + (int)nSamples / self->qmfBands >
+           self->timeSlots)) ||
+      (frame->numParameterSets ==
+       0)) { /* New input samples but missing side info */
+    fDecAndMapFrameData = 1;
+    controlFlags |= MPEGS_CONCEAL;
+  }
+
+  if ((fDecAndMapFrameData == 0) &&
+      (frame->paramSlot[fMax(0, frame->numParameterSets - 1)] !=
+           (self->timeSlots - 1) ||
+       self->curTimeSlot >
+           frame->paramSlot[self->curPs])) { /* Detected faulty parameter slot
+                                                data. */
+    fDecAndMapFrameData = 1;
+    controlFlags |= MPEGS_CONCEAL;
+  }
+
+  /* Update concealment state machine */
+  SpatialDecConcealment_UpdateState(
+      &self->concealInfo,
+      (controlFlags & MPEGS_CONCEAL)
+          ? 0
+          : 1); /* convert from conceal flag to frame ok flag */
+
+  if (fDecAndMapFrameData) {
+    /* Reset spatial framing control vars */
+    frame->newBsData = 0;
+    self->prevTimeSlot = -1;
+    self->curTimeSlot = 0;
+    self->curPs = 0;
+
+    if (controlFlags & MPEGS_CONCEAL) {
+      /* Reset frame data to avoid misconfiguration. */
+      SpatialDecClearFrameData(self, frame, &self->createParams);
+    }
+
+    {
+      err = SpatialDecDecodeFrame(self, frame); /* input: ... */
+      /* output: decodeAndMapFrameDATA */
+    }
+
+    if (err != MPS_OK) {
+      /* Rescue strategy is to apply bypass mode in order
+         to keep at least the downmix channels continuous. */
+      controlFlags |= MPEGS_CONCEAL;
+      if (self->errInt == MPS_OK) {
+        /* store internal error befor it gets overwritten */
+        self->errInt = err;
+      }
+    }
+  }
+
+  err = SpatialDecApplyParameterSets(
+      self, frame, inputMode, inData, qmfInDataReal, qmfInDataImag, nSamples,
+      controlFlags | ((err == MPS_OK) ? 0 : MPEGS_BYPASSMODE), numInputChannels,
+      mapDescr);
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+bail:
+
+  *pControlFlags = controlFlags;
+
+  return err;
+}
diff --git a/fdk-aac/libSACdec/src/sac_dec.h b/fdk-aac/libSACdec/src/sac_dec.h
new file mode 100644
index 0000000..992acad
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec.h
@@ -0,0 +1,539 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Decoder Library structures
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_H
+#define SAC_DEC_H
+
+#include "common_fix.h"
+
+#include "sac_dec_interface.h" /* library interface in ../include */
+
+#include "FDK_qmf_domain.h"
+#include "sac_qmf.h"
+#include "FDK_bitstream.h" /* mp4 bitbuffer */
+#include "sac_calcM1andM2.h"
+#include "FDK_hybrid.h"
+#include "FDK_decorrelate.h"
+#include "sac_reshapeBBEnv.h"
+
+#include "sac_dec_conceal.h"
+
+#include "sac_tsd.h"
+
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#define ICCdefault 0
+#define IPDdefault 0
+#define arbdmxGainDefault 0
+#define CPCdefault 10
+#define tttCLD1default 15
+#define tttCLD2default 0
+
+#define IS_HQ_ONLY(aot)                                                      \
+  ((aot) == AOT_ER_AAC_LD || (aot) == AOT_ER_AAC_ELD || (aot) == AOT_USAC || \
+   (aot) == AOT_RSVD50)
+
+#define SCONST(x) FL2FXCONST_DBL(x)
+
+#define PC_NUM_BANDS (8)
+#define PC_NUM_HYB_BANDS (PC_NUM_BANDS - 3 + 10)
+#define ABS_THR (1e-9f * 32768 * 32768)
+
+#define MAX_HYBRID_BANDS (MAX_NUM_QMF_BANDS - 3 + 10)
+#define HYBRID_FILTER_DELAY (6)
+
+#define MAX_RESIDUAL_FRAMES (4)
+#define MAX_RESIDUAL_BISTREAM \
+  (836) /*  48000 bps * 3 res / (8 * 44100 / 2048 ) */
+#define MAX_MDCT_COEFFS (1024)
+#define SACDEC_RESIDUAL_BS_BUF_SIZE \
+  (1024) /* used to setup and check residual bitstream buffer */
+
+#define MAX_NUM_PARAMS (MAX_NUM_OTT + 4 * MAX_NUM_TTT + MAX_INPUT_CHANNELS)
+#define MAX_NUM_PARAMETERS (MAX(MAX_NUM_PARAMS, MAX_NUM_OTT))
+
+#define MAX_PARAMETER_SETS (9)
+
+#define MAX_M2_INPUT (MAX_OUTPUT_CHANNELS) /* 3 direct + 5 diffuse */
+
+#define MAX_QMF_BANDS_TO_HYBRID \
+  (3) /* 3 bands are filtered again in "40 bands" case */
+#define PROTO_LEN (13)
+#define BUFFER_LEN_LF (PROTO_LEN)
+#define BUFFER_LEN_HF ((PROTO_LEN - 1) / 2)
+
+#define MAX_NO_DECORR_CHANNELS (MAX_OUTPUT_CHANNELS)
+#define HRTF_AZIMUTHS (5)
+
+#define MAX_NUM_OTT_AT 0
+
+/* left out */
+
+typedef enum {
+  UPMIXTYPE_BYPASS = -1, /*just bypass the input channels without processing*/
+  UPMIXTYPE_NORMAL = 0   /*multichannel loudspeaker upmix with spatial data*/
+} UPMIXTYPE;
+
+static inline int isTwoChMode(UPMIXTYPE upmixType) {
+  int retval = 0;
+  return retval;
+}
+
+  /* left out end */
+
+#define MPEGS_BYPASSMODE (0x00000001)
+#define MPEGS_CONCEAL (0x00000002)
+
+typedef struct STP_DEC *HANDLE_STP_DEC;
+
+typedef struct {
+  SCHAR bsQuantCoarseXXXprev;
+  SCHAR bsQuantCoarseXXXprevParse;
+} LOSSLESSSTATE;
+
+typedef struct {
+  SCHAR bsXXXDataMode[MAX_PARAMETER_SETS];
+  SCHAR bsQuantCoarseXXX[MAX_PARAMETER_SETS];
+  SCHAR bsFreqResStrideXXX[MAX_PARAMETER_SETS];
+  SCHAR nocmpQuantCoarseXXX[MAX_PARAMETER_SETS];
+  LOSSLESSSTATE *state; /* Link to persistent state information */
+} LOSSLESSDATA;
+
+struct SPATIAL_BS_FRAME_struct {
+  UCHAR bsIndependencyFlag;
+  UCHAR newBsData;
+  UCHAR numParameterSets;
+
+  /*
+  If bsFramingType == 0, then the paramSlot[ps] for 0 <= ps < numParamSets is
+  calculated as follows: paramSlot[ps] = ceil(numSlots*(ps+1)/numParamSets) - 1
+  Otherwise, it is
+    paramSlot[ps] = bsParamSlot[ps]
+  */
+  INT paramSlot[MAX_PARAMETER_SETS];
+
+  /* These arrays contain the compact indices, only one value per pbstride, only
+   * paramsets actually containing data. */
+  /* These values are written from the parser in ecDataDec() and read during
+   * decode in mapIndexData() */
+  SCHAR cmpOttCLDidx[MAX_NUM_OTT + MAX_NUM_OTT_AT][MAX_PARAMETER_SETS]
+                    [MAX_PARAMETER_BANDS];
+  SCHAR cmpOttICCidx[MAX_NUM_OTT][MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS];
+
+  /* Smoothing */
+  UCHAR bsSmoothMode[MAX_PARAMETER_SETS];
+  UCHAR bsSmoothTime[MAX_PARAMETER_SETS];
+  UCHAR bsFreqResStrideSmg[MAX_PARAMETER_SETS];
+  UCHAR bsSmgData[MAX_PARAMETER_SETS]
+                 [MAX_PARAMETER_BANDS]; /* smoothing flags, one if band is
+                                           smoothed, otherwise zero */
+
+  /* Arbitrary Downmix */
+  SCHAR (*cmpArbdmxGainIdx)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS];
+
+  /* Lossless control */
+  LOSSLESSDATA *CLDLosslessData;
+  LOSSLESSDATA *ICCLosslessData;
+  /* LOSSLESSDATA *ADGLosslessData; -> is stored in CLDLosslessData[offset] */
+
+  LOSSLESSDATA *IPDLosslessData;
+  SCHAR (*cmpOttIPDidx)[MAX_PARAMETER_SETS][MAX_PARAMETER_BANDS];
+  int phaseMode;
+  int OpdSmoothingMode;
+
+  UCHAR tempShapeEnableChannelGES[MAX_OUTPUT_CHANNELS]; /*!< GES side info. */
+  UCHAR bsEnvShapeData[MAX_OUTPUT_CHANNELS]
+                      [MAX_TIME_SLOTS]; /*!< GES side info (quantized). */
+
+  UCHAR tempShapeEnableChannelSTP[MAX_OUTPUT_CHANNELS]; /*!< STP side info. */
+
+  TSD_DATA TsdData[1]; /*!< TSD data structure. */
+};
+
+typedef struct {
+  /* Lossless state */
+  LOSSLESSSTATE CLDLosslessState[MAX_NUM_PARAMETERS];
+  LOSSLESSSTATE ICCLosslessState[MAX_NUM_PARAMETERS];
+  LOSSLESSSTATE IPDLosslessState[MAX_NUM_PARAMETERS];
+} BS_LL_STATE;
+
+typedef struct {
+  int prevParamSlot;
+  int prevSmgTime;
+  UCHAR prevSmgData[MAX_PARAMETER_BANDS];
+
+  FIXP_DBL opdLeftState__FDK[MAX_PARAMETER_BANDS];
+  FIXP_DBL opdRightState__FDK[MAX_PARAMETER_BANDS];
+
+} SMOOTHING_STATE;
+
+typedef struct {
+  FIXP_DBL alpha__FDK;
+  FIXP_DBL beta__FDK;
+  FIXP_DBL partNrgPrev__FDK[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS]
+                           [BB_ENV_SIZE];
+  FIXP_DBL normNrgPrev__FDK[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+  FIXP_DBL frameNrgPrev__FDK[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+  INT partNrgPrevSF[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+  INT partNrgPrev2SF[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+  INT normNrgPrevSF[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+  INT frameNrgPrevSF[2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS];
+} RESHAPE_BBENV_STATE;
+
+typedef struct {
+  int maxNumInputChannels;
+  int maxNumOutputChannels;
+  int maxNumQmfBands;
+  int maxNumHybridBands;
+  int maxNumXChannels;
+  int maxNumVChannels;
+  int maxNumDecorChannels;
+  int maxNumCmplxQmfBands;
+  int maxNumCmplxHybBands;
+  int maxNumResChannels;
+  int bProcResidual; /* process residual */
+  int maxNumResidualChannels;
+  int maxNumOttBoxes;
+  int maxNumParams;
+
+} SACDEC_CREATION_PARAMS;
+
+struct spatialDec_struct {
+  SACDEC_ERROR
+  errInt;             /* Field to store internal errors.
+                         Will be clear at the very beginning of each process call. */
+  int staticDecScale; /* static scale of decoder */
+
+  /* GENERAL */
+  int samplingFreq;       /* [Hz] */
+  CFG_LEVEL decoderLevel; /* 0..5 */
+  CFG_EXTENT decoderMode;
+  CFG_BINAURAL binauralMode;
+
+  SACDEC_CREATION_PARAMS createParams;
+
+  int numComplexProcessingBands;
+
+  int treeConfig; /* TREE_5151 = 5151, TREE_5152 = 5152, TREE_525 = 525, defined
+                     in sac_bitdec.h */
+
+  int numInputChannels;  /* 1 (M) or 2 (L,R) */
+  int numOutputChannels; /* 6 for 3/2.1 (FL,FR,FC,LF,BL,BR) */
+  int numOttBoxes;       /* number of ott boxes */
+  int numM2rows;
+
+  int numOutputChannelsAT; /* Number of output channels after arbitrary tree
+                              processing */
+
+  int quantMode; /* QUANT_FINE, QUANT_EBQ1, QUANT_EBQ2, defined in sac_bitdec.h
+                  */
+  int arbitraryDownmix; /* (arbitraryDownmix != 0) 1 arbitrary downmix data
+                           present, 2 arbitrary downmix residual data present*/
+  int residualCoding;   /* (residualCoding != 0) => residual coding data present
+                         */
+  UCHAR nrResidualFrame;
+  UCHAR nrArbDownmixResidualFrame;
+  FDK_BITSTREAM **hResidualBitstreams;
+  int tempShapeConfig; /* */
+  int decorrType;      /* Indicates to use PS or none PS decorrelator. */
+  int decorrConfig;    /* chosen decorrelator */
+  int envQuantMode;    /* quantization mode of envelope reshaping data */
+
+  FIXP_DBL clipProtectGain__FDK; /* global gain for upmix */
+  char clipProtectGainSF__FDK;   /* global gain for upmix */
+
+  /* Currently ignoring center decorr
+     numVChannels = numDirektSignals + numDecorSignals */
+  int numDirektSignals;  /* needed for W, Number of direkt signals 515 -> 1 525
+                            -> 3 */
+  int wStartResidualIdx; /* Where to start read residuals for W, = 0 for 515, =
+                            1 for 525 since one residual is used in V */
+  int numDecorSignals;   /* needed for W, Number of residual and decorrelated
+                            signals, = 2, 3 for center deccorelation*/
+  int numVChannels;      /* direct signals + decorelator signals */
+  int numXChannels;      /* direct input signals + TTT-residuals */
+
+  int timeSlots;    /* length of spatial frame in QMF samples */
+  int curTimeSlot;  /* pointer to the current time slot used for hyperframing */
+  int prevTimeSlot; /*  */
+  int curPs;
+  int frameLength; /* number of output waveform samples/channel/frame */
+  UPMIXTYPE upmixType;
+  int partiallyComplex;
+  int useFDreverb;
+
+  int bShareDelayWithSBR;
+
+  int tp_hybBandBorder; /* Hybrid band indicating the HP filter cut-off. */
+
+  /* FREQUENCY MAPPING */
+  int qmfBands;
+  int hybridBands;
+  const SCHAR *kernels; /* Mapping hybrid band to parameter band. */
+
+  int TsdTs; /**< TSD QMF slot counter 0<= ts < numSlots */
+
+  int *param2hyb; /* Mapping parameter bands to hybrid bands */
+  int kernels_width[MAX_PARAMETER_BANDS]; /* Mapping parmeter band to hybrid
+                                             band offsets. */
+
+  /* Residual coding */
+  int residualSamplingFreq;
+  UCHAR residualPresent[MAX_NUM_OTT + MAX_NUM_TTT];
+  UCHAR residualBands[MAX_NUM_OTT + MAX_NUM_TTT];    /* 0, if no residual data
+                                                        present for this box */
+  UCHAR residualQMFBands[MAX_NUM_OTT + MAX_NUM_TTT]; /* needed for optimized
+                                                        mdct2qmf calculation */
+  SPATIAL_SPECIFIC_CONFIG *pConfigCurrent;
+
+  int arbdmxFramesPerSpatialFrame;
+  int arbdmxUpdQMF;
+
+  int numParameterBands; /* Number of parameter bands 40, 28, 20, 14, 10, ...
+                            .*/
+  int bitstreamParameterBands;
+  int *numOttBands; /* number of bands for each ott, is != numParameterBands for
+                       LFEs */
+
+  /* 1 MAPPING */
+  UCHAR extendFrame;
+  UCHAR numParameterSetsPrev;
+
+  int *smgTime;
+  UCHAR **smgData;
+
+  /* PARAMETER DATA decoded and dequantized */
+
+  /* Last parameters from prev frame required during decode in mapIndexData()
+   * and not touched during parse */
+  SCHAR **ottCLDidxPrev;
+  SCHAR **ottICCidxPrev;
+  SCHAR **arbdmxGainIdxPrev;
+  SCHAR **ottIPDidxPrev;
+  SCHAR ***outIdxData; /* is this really persistent memory ? */
+
+  /* State mem required during parse in SpatialDecParseFrameData() */
+  SCHAR **cmpOttCLDidxPrev;
+  SCHAR **cmpOttICCidxPrev;
+  SCHAR ***ottICCdiffidx;
+  SCHAR **cmpOttIPDidxPrev;
+
+  /* State mem required in parseArbitraryDownmixData */
+  SCHAR **cmpArbdmxGainIdxPrev;
+
+  SCHAR ***ottCLD__FDK;
+  SCHAR ***ottICC__FDK;
+
+  SCHAR ***arbdmxGain__FDK; /* Holds the artistic downmix correction index.*/
+
+  FIXP_DBL *arbdmxAlpha__FDK;
+  FIXP_DBL *arbdmxAlphaPrev__FDK;
+
+  UCHAR stereoConfigIndex;
+  int highRateMode;
+
+  int phaseCoding;
+
+  SCHAR ***ottIPD__FDK;
+
+  FIXP_DBL PhaseLeft__FDK[MAX_PARAMETER_BANDS];
+  FIXP_DBL PhaseRight__FDK[MAX_PARAMETER_BANDS];
+  FIXP_DBL PhasePrevLeft__FDK[MAX_PARAMETER_BANDS];
+  FIXP_DBL PhasePrevRight__FDK[MAX_PARAMETER_BANDS];
+  int numOttBandsIPD;
+
+  /* GAIN MATRICIES FOR CURRENT and PREVIOUS PARMATER SET(s)*/
+  FIXP_DBL ***M2Real__FDK;
+  FIXP_DBL ***M2Imag__FDK;
+  FIXP_DBL ***M2RealPrev__FDK;
+  FIXP_DBL ***M2ImagPrev__FDK;
+
+  /* INPUT SIGNALS */
+  FIXP_DBL ***qmfInputRealDelayBuffer__FDK;
+  FIXP_DBL ***qmfInputImagDelayBuffer__FDK;
+
+  int pc_filterdelay; /* additional delay to align HQ with LP before hybird
+                         analysis */
+  int qmfInputDelayBufPos;
+  FIXP_DBL **qmfInputReal__FDK;
+  FIXP_DBL **qmfInputImag__FDK;
+
+  FIXP_DBL **hybInputReal__FDK;
+  FIXP_DBL **hybInputImag__FDK;
+
+  FIXP_DBL **binInputReverb;
+
+  FIXP_DBL binGain, reverbGain;
+  FIXP_DBL binCenterGain, reverbCenterGain;
+
+  /* RESIDUAL SIGNALS */
+
+  FIXP_DBL ***qmfResidualReal__FDK;
+  FIXP_DBL ***qmfResidualImag__FDK;
+
+  FIXP_DBL **hybResidualReal__FDK;
+  FIXP_DBL **hybResidualImag__FDK;
+
+  int qmfOutputRealDryDelayBufPos;
+  FIXP_DBL ***qmfOutputRealDryDelayBuffer__FDK;
+  FIXP_DBL ***qmfOutputImagDryFilterBuffer__FDK;
+  FIXP_DBL *qmfOutputImagDryFilterBufferBase__FDK;
+
+  /* TEMPORARY SIGNALS */
+
+  FIXP_DBL **wReal__FDK;
+  FIXP_DBL **wImag__FDK;
+
+  /* OUTPUT SIGNALS */
+  FIXP_DBL **hybOutputRealDry__FDK;
+  FIXP_DBL **hybOutputImagDry__FDK;
+  FIXP_DBL **hybOutputRealWet__FDK;
+  FIXP_DBL **hybOutputImagWet__FDK;
+  PCM_MPS *timeOut__FDK;
+
+  HANDLE_FDK_QMF_DOMAIN pQmfDomain;
+
+  FDK_ANA_HYB_FILTER
+  *hybridAnalysis; /*!< pointer Analysis hybrid filterbank array. */
+  FDK_SYN_HYB_FILTER
+  *hybridSynthesis; /*!< pointer Synthesis hybrid filterbank array. */
+  FIXP_DBL **
+      pHybridAnaStatesLFdmx; /*!< pointer to analysis hybrid filter states LF */
+  FIXP_DBL **
+      pHybridAnaStatesHFdmx; /*!< pointer to analysis hybrid filter states HF */
+  FIXP_DBL **
+      pHybridAnaStatesLFres; /*!< pointer to analysis hybrid filter states LF */
+  FIXP_DBL **
+      pHybridAnaStatesHFres; /*!< pointer to analysis hybrid filter states HF */
+
+  DECORR_DEC *apDecor; /*!< pointer decorrelator array. */
+  FIXP_DBL **pDecorBufferCplx;
+
+  SMOOTHING_STATE *smoothState; /*!< Pointer to smoothing states. */
+
+  RESHAPE_BBENV_STATE *reshapeBBEnvState; /*!< GES handle. */
+  SCHAR row2channelDmxGES[MAX_OUTPUT_CHANNELS];
+
+  HANDLE_STP_DEC hStpDec; /*!< STP handle. */
+
+  const UCHAR *pActivM2ParamBands;
+
+  int bOverwriteM1M2prev; /* Overwrite previous M2/M2 params with first set of
+                             new frame after SSC change (aka
+                             decodeAfterConfigHasChangedFlag). */
+  SpatialDecConcealmentInfo concealInfo;
+};
+
+#define SACDEC_SYNTAX_MPS 1
+#define SACDEC_SYNTAX_USAC 2
+#define SACDEC_SYNTAX_RSVD50 4
+#define SACDEC_SYNTAX_L2 8
+#define SACDEC_SYNTAX_L3 16
+#define SACDEC_SYNTAX_LD 32
+
+static inline int GetProcBand(spatialDec_struct *self, int qs) {
+  return self->kernels[qs];
+}
+
+#endif /* SAC_DEC_H */
diff --git a/fdk-aac/libSACdec/src/sac_dec_conceal.cpp b/fdk-aac/libSACdec/src/sac_dec_conceal.cpp
new file mode 100644
index 0000000..dfeef7b
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec_conceal.cpp
@@ -0,0 +1,392 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):   Christian Ertel, Christian Griebel
+
+   Description: SAC Dec error concealment
+
+*******************************************************************************/
+
+#include "sac_dec_conceal.h"
+
+void SpatialDecConcealment_Init(SpatialDecConcealmentInfo *info,
+                                const UINT resetFlags) {
+  FDK_ASSERT(info != NULL);
+
+  if (resetFlags & MPEGS_CONCEAL_RESET_STATE) {
+    info->concealState = SpatialDecConcealState_Init;
+    /* Frame counters will be initialized implicitely in function
+     * SpatialDecConcealment_UpdateState(). */
+  }
+
+  if (resetFlags & MPEGS_CONCEAL_RESET_PARAMETER) {
+    /* Set default params */
+    info->concealParams.method = MPEGS_CONCEAL_DEFAULT_METHOD;
+    info->concealParams.numKeepFrames = MPEGS_CONCEAL_DEFAULT_NUM_KEEP_FRAMES;
+    info->concealParams.numFadeOutFrames =
+        MPEGS_CONCEAL_DEFAULT_FADE_OUT_SLOPE_LENGTH;
+    info->concealParams.numFadeInFrames =
+        MPEGS_CONCEAL_DEFAULT_FADE_IN_SLOPE_LENGTH;
+    info->concealParams.numReleaseFrames =
+        MPEGS_CONCEAL_DEFAULT_NUM_RELEASE_FRAMES;
+  }
+
+  return;
+}
+
+int SpatialDecConcealment_Apply(
+    SpatialDecConcealmentInfo *info,
+    const SCHAR (*cmpIdxData)[MAX_PARAMETER_BANDS], SCHAR **diffIdxData,
+    SCHAR *
+        idxPrev, /* char
+                    idxPrev[SPATIALDEC_MAX_NUM_OTT][SPATIALDEC_MAX_PARAMETER_BANDS],
+                  */
+    SCHAR *bsXXXDataMode, const int startBand, const int stopBand,
+    const SCHAR defaultValue, const int paramType, const int numParamSets) {
+  int appliedProcessing = 0;
+  int band, dataMode = -1;
+
+  FDK_ASSERT(info != NULL);
+  FDK_ASSERT(cmpIdxData != NULL);
+  FDK_ASSERT(idxPrev != NULL);
+  FDK_ASSERT(bsXXXDataMode != NULL);
+
+  /* Processing depends only on the internal state */
+  switch (info->concealState) {
+    case SpatialDecConcealState_Init:
+      dataMode = 0; /* default */
+      break;
+
+    case SpatialDecConcealState_Ok:
+      /* Nothing to do */
+      break;
+
+    case SpatialDecConcealState_Keep:
+      dataMode = 1; /* keep */
+      break;
+
+    case SpatialDecConcealState_FadeToDefault: {
+      /* Start simple fade out */
+      FIXP_DBL fac = fDivNorm(info->cntStateFrames + 1,
+                              info->concealParams.numFadeOutFrames + 1);
+
+      for (band = startBand; band < stopBand; band += 1) {
+        /*            idxPrev = fac * defaultValue + (1-fac) * idxPrev; */
+        idxPrev[band] =
+            fMultI(fac, defaultValue - idxPrev[band]) + idxPrev[band];
+      }
+      dataMode = 1; /* keep */
+      appliedProcessing = 1;
+    } break;
+
+    case SpatialDecConcealState_Default:
+      for (band = startBand; band < stopBand; band += 1) {
+        idxPrev[band] = defaultValue;
+      }
+      dataMode = 1; /* keep */
+      appliedProcessing = 1;
+      break;
+
+    case SpatialDecConcealState_FadeFromDefault: {
+      FIXP_DBL fac = fDivNorm(info->cntValidFrames + 1,
+                              info->concealParams.numFadeInFrames + 1);
+
+      for (band = startBand; band < stopBand; band += 1) {
+        /*            idxPrev = fac * cmpIdxData + (1-fac) * defaultValue; */
+        idxPrev[band] =
+            fMultI(fac, cmpIdxData[numParamSets - 1][band] - defaultValue) +
+            defaultValue;
+      }
+      dataMode = 1; /* keep */
+      appliedProcessing = 1;
+    } break;
+
+    default:
+      FDK_ASSERT(0); /* All valid states shall be handled above. */
+      break;
+  }
+
+  if (dataMode >= 0) {
+    int i;
+    for (i = 0; i < numParamSets; i += 1) {
+      bsXXXDataMode[i] = dataMode;
+      if (diffIdxData != NULL) {
+        for (band = startBand; band < stopBand; band += 1) {
+          diffIdxData[i][band] = 0;
+        }
+      }
+    }
+  }
+
+  return appliedProcessing;
+}
+
+void SpatialDecConcealment_UpdateState(SpatialDecConcealmentInfo *info,
+                                       const int frameOk) {
+  FDK_ASSERT(info != NULL);
+
+  if (frameOk) {
+    info->cntValidFrames += 1;
+  } else {
+    info->cntValidFrames = 0;
+  }
+
+  switch (info->concealState) {
+    case SpatialDecConcealState_Init:
+      if (frameOk) {
+        /* NEXT STATE: Ok */
+        info->concealState = SpatialDecConcealState_Ok;
+        info->cntStateFrames = 0;
+      }
+      break;
+
+    case SpatialDecConcealState_Ok:
+      if (!frameOk) {
+        /* NEXT STATE: Keep */
+        info->concealState = SpatialDecConcealState_Keep;
+        info->cntStateFrames = 0;
+      }
+      break;
+
+    case SpatialDecConcealState_Keep:
+      info->cntStateFrames += 1;
+      if (frameOk) {
+        /* NEXT STATE: Ok */
+        info->concealState = SpatialDecConcealState_Ok;
+      } else {
+        if (info->cntStateFrames >= info->concealParams.numKeepFrames) {
+          if (info->concealParams.numFadeOutFrames == 0) {
+            /* NEXT STATE: Default */
+            info->concealState = SpatialDecConcealState_Default;
+          } else {
+            /* NEXT STATE: Fade to default */
+            info->concealState = SpatialDecConcealState_FadeToDefault;
+            info->cntStateFrames = 0;
+          }
+        }
+      }
+      break;
+
+    case SpatialDecConcealState_FadeToDefault:
+      info->cntStateFrames += 1;
+      if (info->cntValidFrames > 0) {
+        /* NEXT STATE: Fade in from default */
+        info->concealState = SpatialDecConcealState_FadeFromDefault;
+        info->cntStateFrames = 0;
+      } else {
+        if (info->cntStateFrames >= info->concealParams.numFadeOutFrames) {
+          /* NEXT STATE: Default */
+          info->concealState = SpatialDecConcealState_Default;
+        }
+      }
+      break;
+
+    case SpatialDecConcealState_Default:
+      if (info->cntValidFrames > 0) {
+        if (info->concealParams.numFadeInFrames == 0) {
+          /* NEXT STATE: Ok */
+          info->concealState = SpatialDecConcealState_Ok;
+        } else {
+          /* NEXT STATE: Fade in from default */
+          info->concealState = SpatialDecConcealState_FadeFromDefault;
+          info->cntValidFrames = 0;
+        }
+      }
+      break;
+
+    case SpatialDecConcealState_FadeFromDefault:
+      info->cntValidFrames += 1;
+      if (frameOk) {
+        if (info->cntValidFrames >= info->concealParams.numFadeInFrames) {
+          /* NEXT STATE: Ok */
+          info->concealState = SpatialDecConcealState_Ok;
+        }
+      } else {
+        /* NEXT STATE: Fade to default */
+        info->concealState = SpatialDecConcealState_FadeToDefault;
+        info->cntStateFrames = 0;
+      }
+      break;
+
+    default:
+      FDK_ASSERT(0); /* All valid states should be handled above! */
+      break;
+  }
+}
+
+SACDEC_ERROR SpatialDecConcealment_SetParam(SpatialDecConcealmentInfo *self,
+                                            const SAC_DEC_CONCEAL_PARAM param,
+                                            const INT value) {
+  SACDEC_ERROR err = MPS_OK;
+
+  switch (param) {
+    case SAC_DEC_CONCEAL_METHOD:
+      switch ((SpatialDecConcealmentMethod)value) {
+        case SAC_DEC_CONCEAL_WITH_ZERO_VALUED_OUTPUT:
+        case SAC_DEC_CONCEAL_BY_FADING_PARAMETERS:
+          break;
+        default:
+          err = MPS_INVALID_PARAMETER;
+          goto bail;
+      }
+      if (self != NULL) {
+        /* store parameter value */
+        self->concealParams.method = (SpatialDecConcealmentMethod)value;
+      } else {
+        err = MPS_INVALID_HANDLE;
+        goto bail;
+      }
+      break;
+    case SAC_DEC_CONCEAL_NUM_KEEP_FRAMES:
+      if (value < 0) {
+        err = MPS_INVALID_PARAMETER;
+        goto bail;
+      }
+      if (self != NULL) {
+        /* store parameter value */
+        self->concealParams.numKeepFrames = (UINT)value;
+      } else {
+        err = MPS_INVALID_HANDLE;
+        goto bail;
+      }
+      break;
+    case SAC_DEC_CONCEAL_FADE_OUT_SLOPE_LENGTH:
+      if (value < 0) {
+        err = MPS_INVALID_PARAMETER;
+        goto bail;
+      }
+      if (self != NULL) {
+        /* store parameter value */
+        self->concealParams.numFadeOutFrames = (UINT)value;
+      } else {
+        err = MPS_INVALID_HANDLE;
+        goto bail;
+      }
+      break;
+    case SAC_DEC_CONCEAL_FADE_IN_SLOPE_LENGTH:
+      if (value < 0) {
+        err = MPS_INVALID_PARAMETER;
+        goto bail;
+      }
+      if (self != NULL) {
+        /* store parameter value */
+        self->concealParams.numFadeInFrames = (UINT)value;
+      } else {
+        err = MPS_INVALID_HANDLE;
+        goto bail;
+      }
+      break;
+    case SAC_DEC_CONCEAL_NUM_RELEASE_FRAMES:
+      if (value < 0) {
+        err = MPS_INVALID_PARAMETER;
+        goto bail;
+      }
+      if (self != NULL) {
+        /* store parameter value */
+        self->concealParams.numReleaseFrames = (UINT)value;
+      } else {
+        err = MPS_INVALID_HANDLE;
+        goto bail;
+      }
+      break;
+    default:
+      err = MPS_INVALID_PARAMETER;
+      goto bail;
+  }
+
+bail:
+  return err;
+}
diff --git a/fdk-aac/libSACdec/src/sac_dec_conceal.h b/fdk-aac/libSACdec/src/sac_dec_conceal.h
new file mode 100644
index 0000000..27f5249
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec_conceal.h
@@ -0,0 +1,187 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):   Christian Ertel, Christian Griebel
+
+   Description: SAC Dec error concealment
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_CONCEAL_H
+#define SAC_DEC_CONCEAL_H
+
+#include "sac_dec_interface.h"
+
+/* Modules dynamic parameters: */
+typedef enum {
+  SAC_DEC_CONCEAL_METHOD = 0,
+  SAC_DEC_CONCEAL_NUM_KEEP_FRAMES,
+  SAC_DEC_CONCEAL_FADE_OUT_SLOPE_LENGTH,
+  SAC_DEC_CONCEAL_FADE_IN_SLOPE_LENGTH,
+  SAC_DEC_CONCEAL_NUM_RELEASE_FRAMES
+
+} SAC_DEC_CONCEAL_PARAM;
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - */
+/* sac_dec_interface.h                                 */
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - */
+typedef enum {
+  SAC_DEC_CONCEAL_WITH_ZERO_VALUED_OUTPUT = 0,
+  SAC_DEC_CONCEAL_BY_FADING_PARAMETERS = 1
+
+} SpatialDecConcealmentMethod;
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+/* Default dynamic parameter values: */
+#define MPEGS_CONCEAL_DEFAULT_METHOD SAC_DEC_CONCEAL_BY_FADING_PARAMETERS
+#define MPEGS_CONCEAL_DEFAULT_NUM_KEEP_FRAMES (10)
+#define MPEGS_CONCEAL_DEFAULT_FADE_OUT_SLOPE_LENGTH (5)
+#define MPEGS_CONCEAL_DEFAULT_FADE_IN_SLOPE_LENGTH (5)
+#define MPEGS_CONCEAL_DEFAULT_NUM_RELEASE_FRAMES (3)
+
+typedef enum {
+  SpatialDecConcealState_Init = 0,
+  SpatialDecConcealState_Ok,
+  SpatialDecConcealState_Keep,
+  SpatialDecConcealState_FadeToDefault,
+  SpatialDecConcealState_Default,
+  SpatialDecConcealState_FadeFromDefault
+
+} SpatialDecConcealmentState;
+
+typedef struct {
+  SpatialDecConcealmentMethod method;
+
+  UINT numKeepFrames;
+  UINT numFadeOutFrames;
+  UINT numFadeInFrames;
+  UINT numReleaseFrames;
+
+} SpatialDecConcealmentParams;
+
+typedef struct {
+  SpatialDecConcealmentParams concealParams; /* User set params */
+  SpatialDecConcealmentState
+      concealState; /* State of internal state machine (fade-in/out etc) */
+
+  UINT cntStateFrames; /* Counter for fade-in/out handling */
+  UINT cntValidFrames; /* Counter for the number of consecutive good frames*/
+
+} SpatialDecConcealmentInfo;
+
+/* Module reset flags */
+#define MPEGS_CONCEAL_RESET_STATE (0x01)
+#define MPEGS_CONCEAL_RESET_PARAMETER (0x02)
+#define MPEGS_CONCEAL_RESET_ALL (0xFF)
+
+void SpatialDecConcealment_Init(SpatialDecConcealmentInfo *info,
+                                const UINT resetFlags);
+
+int SpatialDecConcealment_Apply(SpatialDecConcealmentInfo *info,
+                                const SCHAR (*cmpIdxData)[MAX_PARAMETER_BANDS],
+                                SCHAR **diffIdxData, SCHAR *idxPrev,
+                                SCHAR *bsXXXDataMode, const int startBand,
+                                const int stopBand, const SCHAR defaultValue,
+                                const int paramType, const int numParamSets);
+
+void SpatialDecConcealment_UpdateState(SpatialDecConcealmentInfo *info,
+                                       const int frameOk);
+
+SACDEC_ERROR SpatialDecConcealment_SetParam(SpatialDecConcealmentInfo *info,
+                                            const SAC_DEC_CONCEAL_PARAM param,
+                                            const INT value);
+
+#endif /* SAC_DEC_CONCEAL_H */
diff --git a/fdk-aac/libSACdec/src/sac_dec_interface.h b/fdk-aac/libSACdec/src/sac_dec_interface.h
new file mode 100644
index 0000000..a2eea92
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec_interface.h
@@ -0,0 +1,335 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Decoder Library Interface
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_INTERFACE_H
+#define SAC_DEC_INTERFACE_H
+
+#include "common_fix.h"
+#include "FDK_audio.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "sac_dec_errorcodes.h"
+#include "sac_dec_ssc_struct.h"
+
+/**
+ * \brief  Baseline MPEG-Surround profile Level 1-5.
+ */
+typedef enum {
+  DECODER_LEVEL_0 = 0, /*!< Level 0: dummy level; 212 only */
+  DECODER_LEVEL_6 = 6  /*!< Level 6: no support */
+} CFG_LEVEL;
+
+/*
+ * \brief  Number of output channels restriction.
+ */
+typedef enum {
+  OUTPUT_CHANNELS_DEFAULT, /*!< Default configuration depending on Decoder Level
+                            */
+  OUTPUT_CHANNELS_2_0,     /*!< Limitation to stereo output */
+  OUTPUT_CHANNELS_5_1      /*!< Limitation to 5.1 output */
+} CFG_RESTRICTION;
+
+/*
+ * \brief  Supported decoder mode.
+ */
+typedef enum {
+  EXT_HQ_ONLY = 0,  /*!< High Quality processing only */
+  EXT_LP_ONLY = 1,  /*!< Low Power procesing only */
+  EXT_HQ_AND_LP = 2 /*!< Support both HQ and LP processing */
+} CFG_EXTENT;
+
+/*
+ * \brief  Supported binaural mode.
+ */
+typedef enum {
+  BINAURAL_NONE = -1 /*!< No binaural procesing supported */
+} CFG_BINAURAL;
+
+/**
+ * \brief  Decoder configuration structure.
+ *
+ * These structure contains all parameters necessary for decoder open function.
+ * The configuration specifies the functional range of the decoder instance.
+ */
+typedef struct {
+  CFG_LEVEL decoderLevel;
+  CFG_EXTENT decoderMode;
+  CFG_RESTRICTION maxNumOutputChannels;
+  CFG_BINAURAL binauralMode;
+
+} SPATIAL_DEC_CONFIG;
+
+typedef enum {
+  INPUTMODE_QMF = 1000,
+  INPUTMODE_QMF_SBR = 1001,
+  INPUTMODE_TIME = 1002
+} SPATIALDEC_INPUT_MODE;
+
+/**
+ * \brief  MPEG Surround upmix type mode.
+ **/
+typedef enum {
+  UPMIX_TYPE_BYPASS =
+      -1, /*!< Bypass the downmix channels from the core decoder.    */
+  UPMIX_TYPE_NORMAL = 0 /*!< Multi channel output. */
+
+} SPATIAL_DEC_UPMIX_TYPE;
+
+/**
+ * \brief  Dynamic decoder parameters.
+ */
+typedef struct {
+  /* Basics */
+  UCHAR outputMode;
+  UCHAR blindEnable;
+  UCHAR bypassMode;
+
+  /* Error concealment */
+  UCHAR concealMethod;
+  UINT concealNumKeepFrames;
+  UINT concealFadeOutSlopeLength;
+  UINT concealFadeInSlopeLength;
+  UINT concealNumReleaseFrames;
+
+} SPATIALDEC_PARAM;
+
+/**
+ * \brief Flags which control the initialization
+ **/
+typedef enum {
+  MPEGS_INIT_NONE = 0x00000000, /*!< Indicates no initialization */
+
+  MPEGS_INIT_CONFIG = 0x00000010, /*!< Indicates a configuration change due to
+                                     SSC value changes */
+
+  MPEGS_INIT_STATES_ANA_QMF_FILTER =
+      0x00000100, /*!< Controls the initialization of the analysis qmf filter
+                     states */
+  MPEGS_INIT_STATES_SYN_QMF_FILTER =
+      0x00000200, /*!< Controls the initialization of the synthesis qmf filter
+                     states */
+  MPEGS_INIT_STATES_ANA_HYB_FILTER = 0x00000400, /*!< Controls the
+                                                    initialization of the
+                                                    analysis hybrid filter
+                                                    states */
+  MPEGS_INIT_STATES_DECORRELATOR =
+      0x00000800, /*!< Controls the initialization of the decorrelator states */
+  MPEGS_INIT_STATES_M1M2 = 0x00002000, /*!< Controls the initialization of the
+                                          history in m1 and m2 parameter
+                                          calculation */
+  MPEGS_INIT_STATES_GES = 0x00004000,  /*!< Controls the initialization of the
+                                          history in the ges calculation */
+  MPEGS_INIT_STATES_REVERB =
+      0x00008000, /*!< Controls the initialization of the reverb states */
+  MPEGS_INIT_STATES_PARAM =
+      0x00020000, /*!< Controls the initialization of the history of all other
+                     parameter */
+  MPEGS_INIT_STATES_ERROR_CONCEALMENT =
+      0x00080000, /*!< Controls the initialization of the error concealment
+                     module state */
+  MPEGS_INIT_PARAMS_ERROR_CONCEALMENT = 0x00200000 /*!< Controls the
+                                                      initialization of the
+                                                      whole error concealment
+                                                      parameter set */
+
+} MPEGS_INIT_CTRL_FLAGS;
+
+#define MASK_MPEGS_INIT_ALL_STATES (0x000FFF00)
+#define MASK_MPEGS_INIT_ALL_PARAMS (0x00F00000)
+
+typedef struct spatialDec_struct spatialDec, *HANDLE_SPATIAL_DEC;
+
+typedef struct SPATIAL_BS_FRAME_struct SPATIAL_BS_FRAME;
+
+typedef struct {
+  UINT sizePersistent;     /* persistent memory */
+  UINT sizeFastPersistent; /* fast persistent memory */
+
+} MEM_REQUIREMENTS;
+
+#define PCM_MPS INT_PCM
+#define PCM_MPSF FIXP_PCM
+
+#define FIXP_DBL2PCM_MPS(x) ((INT_PCM)FX_DBL2FX_PCM(x))
+
+/* exposed functions (library interface) */
+
+int FDK_SpatialDecCompareSpatialSpecificConfigHeader(
+    SPATIAL_SPECIFIC_CONFIG *pSsc1, SPATIAL_SPECIFIC_CONFIG *pSsc2);
+
+int FDK_SpatialDecInitDefaultSpatialSpecificConfig(
+    SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+    AUDIO_OBJECT_TYPE coreCodec, int coreChannels, int samplingFreq,
+    int nTimeSlots, int decoderLevel, int isBlind);
+
+spatialDec *FDK_SpatialDecOpen(const SPATIAL_DEC_CONFIG *config,
+                               int stereoConfigIndex);
+
+/**
+ * \brief Initialize state variables of the MPS parser
+ */
+void SpatialDecInitParserContext(spatialDec *self);
+
+/**
+ * \brief Initialize state of MPS decoder. This may happen after the first parse
+ * operation.
+ */
+SACDEC_ERROR FDK_SpatialDecInit(spatialDec *self, SPATIAL_BS_FRAME *frame,
+                                SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig,
+                                int nQmfBands,
+                                SPATIAL_DEC_UPMIX_TYPE const upmixType,
+                                SPATIALDEC_PARAM *pUserParams,
+                                UINT initFlags /* MPEGS_INIT_CTRL_FLAGS */
+);
+
+/**
+ * \brief Apply decoded MPEG Surround parameters to time domain or QMF down mix
+ * data.
+ * \param self spatial decoder handle.
+ * \param inData Pointer to time domain input down mix data if any.
+ * \param qmfInDataReal Pointer array of QMF domain down mix input data (real
+ * part).
+ * \param qmfInDataImag Pointer array of QMF domain down mix input data
+ * (imaginary part).
+ * \param pcmOutBuf Pointer to a time domain buffer were the upmixed output data
+ * will be stored into.
+ * \param nSamples Amount of audio samples per channel of down mix input data
+ * (frame length).
+ * \param pControlFlags pointer to control flags field; input/output.
+ * \param numInputChannels amount of down mix input channels. Might not match
+ * the current tree config, useful for internal sanity checks and bypass mode.
+ * \param channelMapping array containing the desired output channel ordering to
+ * transform MPEG PCE style ordering to any other channel ordering. First
+ * dimension is the total channel count.
+ */
+SACDEC_ERROR SpatialDecApplyFrame(
+    spatialDec *self, SPATIAL_BS_FRAME *frame, SPATIALDEC_INPUT_MODE inputMode,
+    PCM_MPS *inData,          /* Time domain input  */
+    FIXP_DBL **qmfInDataReal, /* interleaved l/r */
+    FIXP_DBL **qmfInDataImag, /* interleaved l/r */
+    PCM_MPS *pcmOutBuf, /* MAX_OUTPUT_CHANNELS*MAX_TIME_SLOTS*NUM_QMF_BANDS] */
+    UINT nSamples, UINT *pControlFlags, int numInputChannels,
+    const FDK_channelMapDescr *const mapDescr);
+
+/**
+ * \brief Fill given arrays with audio channel types and indices.
+ * \param self spatial decoder handle.
+ * \param channelType array where corresponding channel types fr each output
+ * channels are stored into.
+ * \param channelIndices array where corresponding channel type indices fr each
+ * output channels are stored into.
+ */
+void SpatialDecChannelProperties(spatialDec *self,
+                                 AUDIO_CHANNEL_TYPE channelType[],
+                                 UCHAR channelIndices[],
+                                 const FDK_channelMapDescr *const mapDescr);
+
+void FDK_SpatialDecClose(spatialDec *self);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SAC_DEC_INTERFACE_H */
diff --git a/fdk-aac/libSACdec/src/sac_dec_lib.cpp b/fdk-aac/libSACdec/src/sac_dec_lib.cpp
new file mode 100644
index 0000000..bf6dedf
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec_lib.cpp
@@ -0,0 +1,1995 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Decoder Library Interface
+
+*******************************************************************************/
+
+#include "sac_dec_lib.h"
+#include "sac_dec_interface.h"
+#include "sac_dec.h"
+#include "sac_bitdec.h"
+#include "FDK_matrixCalloc.h"
+
+#define MPS_DATA_BUFFER_SIZE (2048)
+
+/**
+ * \brief MPEG Surround data indication.
+ **/
+typedef enum {
+  MPEGS_ANCTYPE_FRAME = 0, /*!< MPEG Surround frame, see ISO/IEC 23003-1 */
+  MPEGS_ANCTYPE_HEADER_AND_FRAME = 1, /*!< MPEG Surround header and MPEG
+                                         Surround frame, see ISO/IEC 23003-1 */
+  MPEGS_ANCTYPE_RESERVED_1 = 2,       /*!< reserved, see ISO/IEC 23003-1 */
+  MPEGS_ANCTYPE_RESERVED_2 = 3        /*!< reserved, see ISO/IEC 23003-1*/
+} MPEGS_ANCTYPE;
+
+/**
+ * \brief MPEG Surround data segment indication.
+ **/
+typedef enum {
+  MPEGS_CONTINUE = 0, /*!< Indicates if data segment continues a data block. */
+  MPEGS_STOP = 1,     /*!< Indicates if data segment ends a data block. */
+  MPEGS_START = 2,    /*!< Indicates if data segment begins a data block. */
+  MPEGS_START_STOP =
+      3 /*!< Indicates if data segment begins and ends a data block. */
+} MPEGS_ANCSTARTSTOP;
+
+/**
+ * \brief MPEG Surround synchronizaiton state.
+ *
+ *  CAUTION: Changing the enumeration values can break the sync mechanism
+ *because it is based on comparing the state values.
+ **/
+typedef enum {
+  MPEGS_SYNC_LOST =
+      0, /*!< Indicates lost sync because of current discontinuity. */
+  MPEGS_SYNC_FOUND = 1,   /*!< Parsed a valid header and (re)intialization was
+                             successfully completed. */
+  MPEGS_SYNC_COMPLETE = 2 /*!< In sync and continuous. Found an independent
+                             frame in addition to MPEGS_SYNC_FOUND.
+                               Precondition: MPEGS_SYNC_FOUND. */
+} MPEGS_SYNCSTATE;
+
+/**
+ * \brief MPEG Surround operation mode.
+ **/
+typedef enum {
+  MPEGS_OPMODE_EMM = 0,           /*!< Mode: Enhanced Matrix Mode (Blind) */
+  MPEGS_OPMODE_MPS_PAYLOAD = 1,   /*!< Mode: Normal, Stereo or Binaural */
+  MPEGS_OPMODE_NO_MPS_PAYLOAD = 2 /*!< Mode: no MPEG Surround payload */
+} MPEGS_OPMODE;
+
+/**
+ * \brief MPEG Surround init flags.
+ **/
+typedef enum {
+  MPEGS_INIT_OK = 0x00000000, /*!< indicate correct initialization */
+  MPEGS_INIT_ENFORCE_REINIT =
+      0x00000001, /*!< indicate complete initialization */
+
+  MPEGS_INIT_CHANGE_OUTPUT_MODE =
+      0x00000010, /*!< indicate change of the output mode */
+  MPEGS_INIT_CHANGE_PARTIALLY_COMPLEX =
+      0x00000020, /*!< indicate change of low power/high quality */
+  MPEGS_INIT_CHANGE_TIME_FREQ_INTERFACE =
+      0x00000040, /*!< indicate change of qmf/time interface */
+  MPEGS_INIT_CHANGE_HEADER = 0x00000080, /*!< indicate change of header */
+
+  MPEGS_INIT_ERROR_PAYLOAD =
+      0x00000100, /*!< indicate payload/ancType/ancStartStop error */
+
+  MPEGS_INIT_BS_INTERRUPTION =
+      0x00001000, /*!< indicate bitstream interruption  */
+  MPEGS_INIT_CLEAR_HISTORY =
+      0x00002000, /*!< indicate that all states shall be cleared */
+
+  /* Re-initialization of submodules */
+
+  MPEGS_INIT_CHANGE_CONCEAL_PARAMS = 0x00100000, /*!< indicate a change of at
+                                                    least one error concealment
+                                                    param */
+
+  /* No re-initialization needed, currently not used */
+  MPEGS_INIT_CHANGE_BYPASS_MODE =
+      0x01000000, /*!< indicate change of bypass mode */
+
+  /* Re-initialization needed, currently not used */
+  MPEGS_INIT_ERROR_ANC_TYPE = 0x10000000, /*!< indicate ancType error*/
+  MPEGS_INIT_ERROR_ANC_STARTSTOP =
+      0x20000000 /*!< indicate ancStartStop error */
+} MPEGS_INIT_FLAGS;
+
+struct MpegSurroundDecoder {
+  HANDLE_FDK_QMF_DOMAIN pQmfDomain;
+  UCHAR mpsData[MPS_DATA_BUFFER_SIZE]; /* Buffer for MPS payload accross more
+                                          than one segment */
+  INT mpsDataBits;                     /* Amount of bits in mpsData */
+  /* MPEG Surround decoder */
+  SPATIAL_SPECIFIC_CONFIG spatialSpecificConfig[1]; /* SSC delay line which is
+                                                       used during decoding */
+  spatialDec *pSpatialDec;
+  SPATIAL_SPECIFIC_CONFIG
+  spatialSpecificConfigBackup; /* SSC used while parsing */
+
+  /* Creation parameter */
+  UCHAR mpegSurroundDecoderLevel;
+  /* Run-time parameter */
+  UCHAR mpegSurroundSscIsGlobalCfg; /* Flag telling that the SSC
+                                       (::spatialSpecificConfig) is a
+                                       out-of-band configuration. */
+  UCHAR mpegSurroundUseTimeInterface;
+
+  SPATIAL_BS_FRAME
+  bsFrames[1];         /* Bitstream Structs that contain data read from the
+                          SpatialFrame() bitstream element */
+  BS_LL_STATE llState; /* Bit stream parser state memory */
+  UCHAR bsFrameParse;  /* Current parse frame context index */
+  UCHAR bsFrameDecode; /* Current decode/apply frame context index */
+  UCHAR bsFrameDelay;  /* Amount of frames delay between parsing and processing.
+                          Required i.e. for interpolation error concealment. */
+
+  /* User prameters */
+  SPATIALDEC_PARAM mpegSurroundUserParams;
+
+  /* Internal flags */
+  SPATIAL_DEC_UPMIX_TYPE upmixType;
+  int initFlags[1];
+  MPEGS_ANCSTARTSTOP ancStartStopPrev;
+  MPEGS_SYNCSTATE fOnSync[1];
+
+  /* Inital decoder configuration */
+  SPATIAL_DEC_CONFIG decConfig;
+};
+
+SACDEC_ERROR
+static sscCheckOutOfBand(const SPATIAL_SPECIFIC_CONFIG *pSsc,
+                         const INT coreCodec, const INT sampleRate,
+                         const INT frameSize);
+
+static SACDEC_ERROR sscParseCheck(const SPATIAL_SPECIFIC_CONFIG *pSsc);
+
+/**
+ * \brief Get the number of QMF bands from the sampling frequency (in Hz)
+ **/
+static int mpegSurroundDecoder_GetNrOfQmfBands(
+    const SPATIAL_SPECIFIC_CONFIG *pSsc, UINT sampleRate) {
+  UINT samplingFrequency = sampleRate;
+  int qmfBands = 64;
+
+  if (pSsc != NULL) {
+    switch (pSsc->coreCodec) {
+      case AOT_USAC:
+        if ((pSsc->stereoConfigIndex == 3)) {
+          static const UCHAR mapIdx2QmfBands[3] = {24, 32, 16};
+          FDK_ASSERT((pSsc->coreSbrFrameLengthIndex >= 2) &&
+                     (pSsc->coreSbrFrameLengthIndex <= 4));
+          qmfBands = mapIdx2QmfBands[pSsc->coreSbrFrameLengthIndex - 2];
+        }
+        return qmfBands;
+      default:
+        samplingFrequency = pSsc->samplingFreq;
+        break;
+    }
+  }
+
+  /* number of QMF bands depend on sampling frequency, see FDIS 23003-1:2006
+   * Chapter 6.3.3 */
+  if (samplingFrequency < 27713) {
+    qmfBands = 32;
+  }
+  if (samplingFrequency > 55426) {
+    qmfBands = 128;
+  }
+
+  return qmfBands;
+}
+
+/**
+ * \brief Analyse init flags
+ **/
+static int mpegSurroundDecoder_CalcInitFlags(SPATIAL_SPECIFIC_CONFIG *pSsc1,
+                                             SPATIAL_SPECIFIC_CONFIG *pSsc2,
+                                             int upmixTypeFlag,
+                                             int binauralQualityFlag,
+                                             int partiallyComplexFlag,
+                                             int *ctrlFlags) {
+  /* Analyse core coder */
+  if (pSsc1->coreCodec != pSsc2->coreCodec) {
+    *ctrlFlags |= MASK_MPEGS_INIT_ALL_STATES;
+    *ctrlFlags |= MASK_MPEGS_INIT_ALL_PARAMS;
+  } else {
+    /* Analyse elements for initialization of space analysis qmf filterbank */
+    if ((partiallyComplexFlag) || (pSsc1->treeConfig != pSsc2->treeConfig) ||
+        (pSsc1->samplingFreq != pSsc2->samplingFreq)) {
+      *ctrlFlags |= MPEGS_INIT_STATES_ANA_QMF_FILTER;
+      *ctrlFlags |= MPEGS_INIT_STATES_ANA_HYB_FILTER;
+    }
+
+    /* Analyse elements for initialization of space synthesis qmf filterbank */
+    if ((upmixTypeFlag) || (partiallyComplexFlag) ||
+        (pSsc1->treeConfig != pSsc2->treeConfig) ||
+        (pSsc1->samplingFreq != pSsc2->samplingFreq) ||
+        (pSsc1->bsFixedGainDMX != pSsc2->bsFixedGainDMX)) {
+      *ctrlFlags |= MPEGS_INIT_STATES_SYN_QMF_FILTER;
+    }
+
+    /* Analyse elements for initialization of decorrelator */
+    if ((upmixTypeFlag) || (partiallyComplexFlag) ||
+        (pSsc1->treeConfig != pSsc2->treeConfig) ||
+        (pSsc1->samplingFreq != pSsc2->samplingFreq) ||
+        (pSsc1->decorrConfig != pSsc2->decorrConfig)) {
+      *ctrlFlags |= MPEGS_INIT_STATES_DECORRELATOR;
+    }
+
+    /* Analyse elements for initialization of m1 and m2 calculation */
+    if ((upmixTypeFlag) || (binauralQualityFlag) ||
+        (pSsc1->treeConfig != pSsc2->treeConfig) ||
+        (pSsc1->samplingFreq != pSsc2->samplingFreq))
+
+    {
+      *ctrlFlags |= MPEGS_INIT_STATES_M1M2;
+    }
+
+    /* Analyse elements for initialization of GES */
+    if ((upmixTypeFlag) || (pSsc1->treeConfig != pSsc2->treeConfig) ||
+        (pSsc1->tempShapeConfig != pSsc2->tempShapeConfig)) {
+      *ctrlFlags |= MPEGS_INIT_STATES_GES;
+    }
+
+    /* Analyse elements for initialization of FDreverb */
+    if ((upmixTypeFlag) || (binauralQualityFlag) || (partiallyComplexFlag) ||
+        (pSsc1->samplingFreq != pSsc2->samplingFreq) ||
+        (pSsc1->nTimeSlots != pSsc2->nTimeSlots)) {
+      *ctrlFlags |= MPEGS_INIT_STATES_REVERB;
+    }
+
+    /* Reset previous frame data whenever the config changes */
+    if (*ctrlFlags & MPEGS_INIT_CONFIG) {
+      *ctrlFlags |= MPEGS_INIT_STATES_PARAM;
+    }
+  }
+
+  return MPS_OK;
+}
+
+/**
+ * \brief Reset MPEG Surround status info
+ **/
+static void updateMpegSurroundDecoderStatus(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, int initFlags,
+    MPEGS_SYNCSTATE fOnSync, MPEGS_ANCSTARTSTOP ancStartStopPrev) {
+  pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+      initFlags;
+  if ((pMpegSurroundDecoder->mpegSurroundSscIsGlobalCfg != 0) &&
+      (pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] >=
+       MPEGS_SYNC_FOUND) &&
+      (fOnSync < MPEGS_SYNC_FOUND)) {
+    pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+        MPEGS_SYNC_FOUND;
+  } else {
+    pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+        fOnSync;
+  }
+  pMpegSurroundDecoder->ancStartStopPrev = ancStartStopPrev;
+}
+
+static SACDEC_ERROR mpegSurroundDecoder_Create(
+    CMpegSurroundDecoder **pMpegSurroundDecoder, int stereoConfigIndex,
+    HANDLE_FDK_QMF_DOMAIN pQmfDomain);
+
+SAC_INSTANCE_AVAIL
+mpegSurroundDecoder_IsFullMpegSurroundDecoderInstanceAvailable(
+    CMpegSurroundDecoder *pMpegSurroundDecoder) {
+  SAC_INSTANCE_AVAIL instanceAvailable = SAC_INSTANCE_NOT_FULL_AVAILABLE;
+
+  if (pMpegSurroundDecoder->pSpatialDec != NULL) {
+    instanceAvailable = SAC_INSTANCE_FULL_AVAILABLE;
+  }
+
+  return instanceAvailable;
+}
+
+SACDEC_ERROR mpegSurroundDecoder_Open(
+    CMpegSurroundDecoder **pMpegSurroundDecoder, int stereoConfigIndex,
+    HANDLE_FDK_QMF_DOMAIN pQmfDomain) {
+  SACDEC_ERROR error;
+
+  error = mpegSurroundDecoder_Create(pMpegSurroundDecoder, stereoConfigIndex,
+                                     pQmfDomain);
+
+  return error;
+}
+
+/**
+ * \brief  Renamed function from getUpmixType to check_UParam_Build_DecConfig.
+ *         This function checks if user params, decoder config and SSC are valid
+ *         and if the decoder build can handle all this settings.
+ *         The upmix type may be modified by this function.
+ *         It is called in initMpegSurroundDecoder() after the ssc parse check,
+ *         to have all checks in one place and to ensure these checks are always
+ *         performed if config changes (inband and out-of-band).
+ *
+ * \param pUserParams  User data handle.
+ * \param pDecConfig   decoder config handle.
+ * \param pSsc         spatial specific config handle.
+ * \param pUpmixType   upmix type which is set by this function
+ *
+ * \return  MPS_OK on sucess, and else on failure.
+ */
+static SACDEC_ERROR check_UParam_Build_DecConfig(
+    SPATIALDEC_PARAM const *pUserParams, SPATIAL_DEC_CONFIG const *pDecConfig,
+    const SPATIAL_SPECIFIC_CONFIG *pSsc, SPATIAL_DEC_UPMIX_TYPE *pUpmixType) {
+  int dmxChannels, outChannels, maxNumOutChannels;
+
+  FDK_ASSERT(pUserParams != NULL);
+  FDK_ASSERT(pUpmixType != NULL);
+
+  /* checks if implementation can handle the Ssc */
+
+  switch (pSsc->treeConfig) {
+    case SPATIALDEC_MODE_RSVD7: /* 212 */
+      dmxChannels = 1;
+      outChannels = 2;
+      break;
+    default:
+      return MPS_UNSUPPORTED_CONFIG;
+  }
+
+  /* ------------------------------------------- */
+
+  /* Analyse pDecConfig params */
+  switch (pDecConfig->binauralMode) {
+    case BINAURAL_NONE:
+      break;
+    default:
+      return MPS_UNSUPPORTED_CONFIG;
+  }
+
+  switch (pDecConfig->decoderMode) {
+    case EXT_HQ_ONLY:
+      break;
+    default:
+      return MPS_UNSUPPORTED_CONFIG;
+  }
+
+  switch (pDecConfig->maxNumOutputChannels) {
+    case OUTPUT_CHANNELS_DEFAULT:
+      /* No special restrictions -> Get the level restriction: */
+      switch (pDecConfig->decoderLevel) {
+        case DECODER_LEVEL_0:
+          maxNumOutChannels = 2;
+          break;
+        default:
+          return MPS_UNSUPPORTED_CONFIG;
+      }
+      break;
+    case OUTPUT_CHANNELS_2_0:
+      maxNumOutChannels = 2;
+      break;
+    default:
+      return MPS_UNSUPPORTED_CONFIG;
+  }
+  /* ------------------------- */
+
+  /* check if we can handle user params */
+  if (pUserParams->blindEnable == 1) {
+    return MPS_UNSUPPORTED_CONFIG;
+  }
+  {
+    switch ((SAC_DEC_OUTPUT_MODE)pUserParams->outputMode) {
+      case SACDEC_OUT_MODE_NORMAL:
+        if (maxNumOutChannels >= outChannels) {
+          *pUpmixType = UPMIX_TYPE_NORMAL;
+        } else {
+          { *pUpmixType = UPMIX_TYPE_BYPASS; }
+        }
+        break;
+      case SACDEC_OUT_MODE_STEREO:
+        if (dmxChannels == 1) {
+          if (outChannels == 2) {
+            *pUpmixType = UPMIX_TYPE_NORMAL;
+          }
+        } else {
+          *pUpmixType = UPMIX_TYPE_BYPASS;
+        }
+        break;
+      case SACDEC_OUT_MODE_6CHANNEL:
+        if (outChannels > 6) {
+          { *pUpmixType = UPMIX_TYPE_BYPASS; }
+        } else {
+          *pUpmixType = UPMIX_TYPE_NORMAL;
+        }
+        break;
+      default:
+        return MPS_UNSUPPORTED_CONFIG;
+    }
+  }
+
+  return MPS_OK;
+}
+
+/**
+ * \brief Init MPEG Surround decoder.
+ **/
+static SACDEC_ERROR initMpegSurroundDecoder(
+    CMpegSurroundDecoder *pMpegSurroundDecoder) {
+  SACDEC_ERROR err;
+  int initFlags = MPEGS_INIT_NONE, initFlagsDec;
+  int upmixTypeCurr = pMpegSurroundDecoder->upmixType;
+
+  FDK_ASSERT(pMpegSurroundDecoder != NULL);
+
+  SPATIAL_SPECIFIC_CONFIG *const pSSCinput =
+      &pMpegSurroundDecoder->spatialSpecificConfigBackup;
+  SPATIAL_SPECIFIC_CONFIG *const pSSCtarget =
+      &pMpegSurroundDecoder
+           ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameDecode];
+  initFlagsDec =
+      pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode];
+
+  if (pSSCinput->coreCodec != AOT_USAC) {
+    /* here we check if we have a valid Ssc */
+    err = sscParseCheck(pSSCinput);
+    if (err != MPS_OK) goto bail;
+  }
+
+  /* here we check if Ssc matches build; also check UParams and DecConfig */
+  /* if desired upmixType is changes                                      */
+  err = check_UParam_Build_DecConfig(
+      &pMpegSurroundDecoder->mpegSurroundUserParams,
+      &pMpegSurroundDecoder->decConfig, pSSCinput,
+      &pMpegSurroundDecoder->upmixType);
+  if (err != MPS_OK) goto bail;
+
+  /* init config */
+  if (initFlagsDec & MPEGS_INIT_CHANGE_HEADER) {
+    initFlags |= MPEGS_INIT_CONFIG;
+  }
+  /* init all states */
+  if (initFlagsDec & MPEGS_INIT_CLEAR_HISTORY) {
+    initFlags |= MASK_MPEGS_INIT_ALL_STATES;
+  }
+  if (initFlagsDec & MPEGS_INIT_CHANGE_CONCEAL_PARAMS) {
+    initFlags |= MPEGS_INIT_PARAMS_ERROR_CONCEALMENT;
+  }
+
+  if (initFlagsDec & MPEGS_INIT_ENFORCE_REINIT) {
+    /* init all states */
+    initFlags |= MASK_MPEGS_INIT_ALL_STATES;
+    initFlags |= MASK_MPEGS_INIT_ALL_PARAMS;
+  } else {
+    /* analyse states which have to be initialized */
+    mpegSurroundDecoder_CalcInitFlags(
+        pSSCtarget, pSSCinput,
+        (upmixTypeCurr !=
+         pMpegSurroundDecoder->upmixType), /* upmixType changed */
+        0, (initFlagsDec & MPEGS_INIT_CHANGE_PARTIALLY_COMPLEX) ? 1 : 0,
+        &initFlags);
+  }
+
+  {
+    int nrOfQmfBands;
+    FDKmemcpy(pSSCtarget, pSSCinput, sizeof(SPATIAL_SPECIFIC_CONFIG));
+
+    nrOfQmfBands = mpegSurroundDecoder_GetNrOfQmfBands(
+        pSSCtarget, pSSCtarget->samplingFreq);
+    err = FDK_SpatialDecInit(
+        pMpegSurroundDecoder->pSpatialDec,
+        &pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameDecode],
+        pSSCtarget, nrOfQmfBands, pMpegSurroundDecoder->upmixType,
+        &pMpegSurroundDecoder->mpegSurroundUserParams, initFlags);
+
+    if (err != MPS_OK) goto bail;
+
+    /* Signal that we got a header and can go on decoding */
+    if (err == MPS_OK) {
+      initFlagsDec = MPEGS_INIT_OK;
+      {
+        pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+            MPEGS_SYNC_FOUND;
+      }
+    }
+  }
+
+bail:
+  pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] =
+      initFlagsDec;
+  return err;
+}
+
+/**
+ * \brief Init MPEG Surround decoder.
+ **/
+SACDEC_ERROR mpegSurroundDecoder_Init(
+    CMpegSurroundDecoder *pMpegSurroundDecoder) {
+  SACDEC_ERROR err = MPS_OK;
+
+  if (pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode]) {
+    err = initMpegSurroundDecoder(pMpegSurroundDecoder);
+  }
+  return err;
+}
+
+/**
+ * \brief Open MPEG Surround decoder.
+ **/
+static SACDEC_ERROR mpegSurroundDecoder_Create(
+    CMpegSurroundDecoder **pMpegSurroundDecoder, int stereoConfigIndex,
+    HANDLE_FDK_QMF_DOMAIN pQmfDomain) {
+  SACDEC_ERROR err = MPS_OK;
+  CMpegSurroundDecoder *sacDec = NULL;
+  spatialDec *self = NULL;
+
+  /* decoderLevel  decoderMode  maxNumOutputChannels  binauralMode */
+  static const SPATIAL_DEC_CONFIG decConfig = {
+      (CFG_LEVEL)(0), EXT_HQ_ONLY, OUTPUT_CHANNELS_DEFAULT, BINAURAL_NONE};
+
+  if (*pMpegSurroundDecoder == NULL) {
+    FDK_ALLOCATE_MEMORY_1D(*pMpegSurroundDecoder, 1, CMpegSurroundDecoder)
+
+    for (int i = 0; i < 1; i++) {
+      err = SpatialDecCreateBsFrame(&(*pMpegSurroundDecoder)->bsFrames[i],
+                                    &(*pMpegSurroundDecoder)->llState);
+      if (err != MPS_OK) {
+        sacDec = *pMpegSurroundDecoder;
+        goto bail;
+      }
+    }
+    (*pMpegSurroundDecoder)->pQmfDomain = pQmfDomain;
+
+    (*pMpegSurroundDecoder)->bsFrameDelay = 1;
+    (*pMpegSurroundDecoder)->bsFrameParse = 0;
+    (*pMpegSurroundDecoder)->bsFrameDecode = 0;
+
+    return err;
+  } else {
+    sacDec = *pMpegSurroundDecoder;
+  }
+
+  if (sacDec->pSpatialDec == NULL) {
+    if ((self = FDK_SpatialDecOpen(&decConfig, stereoConfigIndex)) == NULL) {
+      err = MPS_OUTOFMEMORY;
+      goto bail;
+    }
+  } else {
+    self = sacDec->pSpatialDec;
+  }
+
+  self->pQmfDomain = sacDec->pQmfDomain;
+
+  sacDec->pSpatialDec = self;
+
+  /* default parameter set */
+  sacDec->mpegSurroundUserParams.outputMode = SACDEC_OUT_MODE_NORMAL;
+  sacDec->mpegSurroundUserParams.blindEnable = 0;
+  sacDec->mpegSurroundUserParams.bypassMode = 0;
+  sacDec->mpegSurroundUserParams.concealMethod = 1;
+  sacDec->mpegSurroundUserParams.concealNumKeepFrames = 10;
+  sacDec->mpegSurroundUserParams.concealFadeOutSlopeLength = 5;
+  sacDec->mpegSurroundUserParams.concealFadeInSlopeLength = 5;
+  sacDec->mpegSurroundUserParams.concealNumReleaseFrames = 3;
+  sacDec->mpegSurroundSscIsGlobalCfg = 0;
+  sacDec->mpegSurroundUseTimeInterface = 1;
+  sacDec->mpegSurroundDecoderLevel = decConfig.decoderLevel;
+
+  sacDec->upmixType = UPMIX_TYPE_NORMAL;
+
+  /* signalize spatial decoder re-initalization */
+  updateMpegSurroundDecoderStatus(sacDec, MPEGS_INIT_ENFORCE_REINIT,
+                                  MPEGS_SYNC_LOST, MPEGS_STOP);
+
+  /* return decoder instance */
+  *pMpegSurroundDecoder = sacDec;
+  sacDec->decConfig = decConfig;
+
+  SpatialDecInitParserContext(sacDec->pSpatialDec);
+
+  return err;
+
+bail:
+  if (sacDec != NULL) {
+    mpegSurroundDecoder_Close(sacDec);
+  }
+  *pMpegSurroundDecoder = NULL;
+  if (err == MPS_OK) {
+    return MPS_OUTOFMEMORY;
+  } else {
+    return err;
+  }
+}
+
+/**
+ * \brief Config MPEG Surround decoder.
+ **/
+SACDEC_ERROR mpegSurroundDecoder_Config(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, HANDLE_FDK_BITSTREAM hBs,
+    AUDIO_OBJECT_TYPE coreCodec, INT samplingRate, INT frameSize,
+    INT stereoConfigIndex, INT coreSbrFrameLengthIndex, INT configBytes,
+    const UCHAR configMode, UCHAR *configChanged) {
+  SACDEC_ERROR err = MPS_OK;
+  SPATIAL_SPECIFIC_CONFIG spatialSpecificConfig;
+  SPATIAL_SPECIFIC_CONFIG *pSsc =
+      &pMpegSurroundDecoder->spatialSpecificConfigBackup;
+
+  switch (coreCodec) {
+    case AOT_DRM_USAC:
+    case AOT_USAC:
+      if (configMode == AC_CM_DET_CFG_CHANGE) {
+        /* In config detection mode write spatial specific config parameters
+         * into temporarily allocated structure */
+        err = SpatialDecParseMps212Config(
+            hBs, &spatialSpecificConfig, samplingRate, coreCodec,
+            stereoConfigIndex, coreSbrFrameLengthIndex);
+        pSsc = &spatialSpecificConfig;
+      } else {
+        err = SpatialDecParseMps212Config(
+            hBs, &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+            samplingRate, coreCodec, stereoConfigIndex,
+            coreSbrFrameLengthIndex);
+      }
+      break;
+    case AOT_ER_AAC_ELD:
+    case AOT_ER_AAC_LD:
+      if (configMode == AC_CM_DET_CFG_CHANGE) {
+        /* In config detection mode write spatial specific config parameters
+         * into temporarily allocated structure */
+        err = SpatialDecParseSpecificConfig(hBs, &spatialSpecificConfig,
+                                            configBytes, coreCodec);
+        pSsc = &spatialSpecificConfig;
+      } else {
+        err = SpatialDecParseSpecificConfig(
+            hBs, &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+            configBytes, coreCodec);
+      }
+      break;
+    default:
+      err = MPS_UNSUPPORTED_FORMAT;
+      break;
+  }
+
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+  err = sscCheckOutOfBand(pSsc, coreCodec, samplingRate, frameSize);
+
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+  if (configMode & AC_CM_DET_CFG_CHANGE) {
+    return err;
+  }
+
+  if (configMode & AC_CM_ALLOC_MEM) {
+    if (*configChanged) {
+      err = mpegSurroundDecoder_Open(&pMpegSurroundDecoder, stereoConfigIndex,
+                                     NULL);
+      if (err) {
+        return err;
+      }
+    }
+  }
+
+  {
+    SPATIAL_SPECIFIC_CONFIG *sscParse =
+        &pMpegSurroundDecoder
+             ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameParse];
+
+    if (FDK_SpatialDecCompareSpatialSpecificConfigHeader(
+            &pMpegSurroundDecoder->spatialSpecificConfigBackup, sscParse)) {
+      pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameParse] |=
+          MPEGS_INIT_CHANGE_HEADER;
+      /* Error resilience code */
+      if (pMpegSurroundDecoder->pSpatialDec == NULL) {
+        err = MPS_NOTOK;
+        goto bail;
+      }
+      SpatialDecInitParserContext(pMpegSurroundDecoder->pSpatialDec);
+      pMpegSurroundDecoder->pSpatialDec->pConfigCurrent =
+          &pMpegSurroundDecoder
+               ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameDecode];
+    }
+  }
+
+  if (err == MPS_OK) {
+    /* We got a valid out-of-band configuration so label it accordingly. */
+    pMpegSurroundDecoder->mpegSurroundSscIsGlobalCfg = 1;
+  }
+
+bail:
+  return err;
+}
+
+/**
+ * \brief Determine MPEG Surround operation mode.
+ **/
+static MPEGS_OPMODE mpegSurroundOperationMode(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, int mpsDataBits) {
+  MPEGS_OPMODE mode;
+
+  {
+    if ((mpsDataBits > 0) &&
+        (pMpegSurroundDecoder->mpegSurroundUserParams.blindEnable == 0)) {
+      mode = MPEGS_OPMODE_MPS_PAYLOAD; /* Mode: Normal, Stereo or Binaural */
+    } else {
+      mode = MPEGS_OPMODE_NO_MPS_PAYLOAD; /* Mode: No MPEG Surround Payload */
+      updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                      MPEGS_INIT_ERROR_PAYLOAD, MPEGS_SYNC_LOST,
+                                      MPEGS_STOP);
+    }
+  }
+
+  return (mode);
+}
+
+/**
+ * \brief  Check ssc for parse errors.
+ *         This one is called in initMpegSurroundDecoder()
+ *         to ensure checking of inband and out-of-band mps configs.
+ *         Only parse errors checked here! Check for valid config is done
+ *         in check_UParam_Build_DecConfig()!
+ *
+ * \param pSsc         spatial specific config handle.
+ *
+ * \return  MPS_OK on sucess, and else on parse error.
+ */
+static SACDEC_ERROR sscParseCheck(const SPATIAL_SPECIFIC_CONFIG *pSsc) {
+  if (pSsc->samplingFreq > 96000) return MPS_PARSE_ERROR;
+  if (pSsc->samplingFreq < 8000) return MPS_PARSE_ERROR;
+
+  if ((pSsc->treeConfig < 0) || (pSsc->treeConfig > 7)) {
+    return MPS_PARSE_ERROR;
+  }
+
+  if ((pSsc->quantMode < 0) || (pSsc->quantMode > 2)) {
+    return MPS_PARSE_ERROR;
+  }
+
+  /* now we are sure there were no parsing errors */
+
+  return MPS_OK;
+}
+
+/**
+ * \brief  Check number of time slots
+ *
+ * Basically the mps frame length must be a multiple of the core coder frame
+ * length. The below table shows all valid configurations in detail. See ISO/IEC
+ * 23003-1: "Table 4A - Allowed values for bsFrameLength in the Baseline MPEG
+ * Surround Profile"
+ *
+ * Downmix Coder        Downmix Code      Allowed values for bsFrameLength
+ * Allowed frame sizes for normal, downsampled and upsampled MPS Framelength
+ *                      (QMF Samples)
+ *
+ * AAC 1024                  16           15, 31, 47, 63 1024  2048  3072  4096
+ * downsampled MPS           32           31, 63 1024  2048 upsampled MPS
+ * 8            7, 15, 23, 31, 39, 47, 55, 63, 71    1024  2048  3072  4096
+ * 5120  6144  7168  8192  9216
+ *
+ * AAC 960                   15           14, 29, 44, 59 960  1920  2880  3840
+ * downsampled MPS           30           29, 59 960  1920 upsampled MPS
+ * 7,5           14, 29, 44, 59                        1920  3840  5760  7680
+ *
+ * HE-AAC 1024/2048          32           31, 63 2048  4096 downsampled MPS
+ * 64           63                                    2048 upsampled MPS
+ * 16           15, 31, 47, 63                        2048  4096  6144  8192
+ *
+ * HE-AAC 960/1920           30           29, 59 1920  3840 downsampled MPS
+ * 60           59                                    1920 upsampled MPS
+ * 15           14, 29, 44, 59                        1920  3840  5760  7680
+ *
+ * BSAC                      16           15, 31, 47, 63 1024  2048  3072  4096
+ * downsampled MPS           32           31, 63 1024  2048 upsampled MPS
+ * 8            7, 15, 23, 31, 39, 47, 55, 63, 71    1024  2048  3072  4096
+ * 5120  6144  7168  8192  9216
+ *
+ * BSAC with SBR             32           31, 63 2048  4096 downsampled MPS
+ * 64           63                                    2048 upsampled MPS
+ * 16           15, 31, 47, 63                        2048  4096  6144  8192
+ *
+ * AAC LD 512                 8            7, 15, 23, 31, 39, 47, 55, 63, 71
+ * 512  1024  1536  2048  2560  3072  3584  4096  4608 downsampled MPS
+ * 16           15, 31, 47, 63                         512  1024  1536  2048
+ *
+ * AAC ELD 512                8            7, 15, 23, 31, 39, 47, 55, 63, 71
+ * 512  1024  1536  2048  2560  3072  3584  4096  4608 downsampled MPS
+ * 16           15, 31, 47, 63                         512  1024  1536  2048
+ *
+ * AAC ELD with SBR 512/1024 16           15, 31, 47, 63 1024  2048  3072  4096
+ * downsampled MPS           32           31, 63 1024  2048 upsampled MPS
+ * 8            7, 15, 23, 31, 39, 47, 55, 63, 71    1024  2048  3072  4096
+ * 5120  6144  7168  8192  9216
+ *
+ * MPEG1/2 Layer II          18           17, 35, 53, 71 1152  2304  3456  4608
+ * downsampled MPS           36           35, 71 1152  2304
+ *
+ * MPEG1/2 Layer III         18           17, 35, 53, 71 1152  2304  3456  4608
+ * downsampled MPS           36           35, 71 1152  2304
+ *
+ * \param frameLength
+ * \param qmfBands
+ * \param timeSlots
+ *
+ * \return  error code
+ */
+SACDEC_ERROR checkTimeSlots(int frameLength, int qmfBands, int timeSlots) {
+  int len;
+  int maxFrameLength;
+
+  if (qmfBands == 64) {
+    /* normal MPEG Surround */
+    switch (frameLength) {
+      case 960:
+      case 1920:
+        maxFrameLength = 3840;
+        break;
+      case 1024:
+      case 2048:
+        maxFrameLength = 4096;
+        break;
+      case 512:
+      case 1152:
+        maxFrameLength = 4608;
+        break;
+      default:
+        return MPS_PARSE_ERROR;
+    }
+  } else if (qmfBands == 32) {
+    /* downsampled MPEG Surround */
+    switch (frameLength) {
+      case 960:
+      case 1920:
+        maxFrameLength = 1920;
+        break;
+      case 512:
+      case 1024:
+      case 2048:
+        maxFrameLength = 2048;
+        break;
+      case 1152:
+        maxFrameLength = 2304;
+        break;
+      default:
+        return MPS_PARSE_ERROR;
+    }
+  } else if (qmfBands == 128) {
+    /* upsampled MPEG Surround */
+    switch (frameLength) {
+      case 1920:
+        maxFrameLength = 7680;
+        break;
+      case 1024:
+        maxFrameLength = 9216;
+        break;
+      case 2048:
+        maxFrameLength = 8192;
+        break;
+      case 512:
+      case 960:
+      case 1152:
+      /* no break, no support for upsampled MPEG Surround */
+      default:
+        return MPS_PARSE_ERROR;
+    }
+  } else {
+    return MPS_PARSE_ERROR;
+  }
+
+  len = frameLength;
+
+  while (len <= maxFrameLength) {
+    if (len == timeSlots * qmfBands) {
+      return MPS_OK;
+    }
+    len += frameLength;
+  }
+  return MPS_PARSE_ERROR;
+}
+
+/**
+ * \brief  Check ssc for consistency (e.g. bit errors could cause trouble)
+ *         First of currently two ssc-checks.
+ *         This (old) one is called in mpegSurroundDecoder_Apply()
+ *         only if inband mps config is contained in stream.
+ *
+ *         New ssc check is split in two functions sscParseCheck() and
+ * check_UParam_Build_DecConfig(). sscParseCheck() checks only for correct
+ * parsing. check_UParam_Build_DecConfig() is used to check if we have a
+ * valid config. Both are called in initMpegSurroundDecoder() to ensure
+ * checking of inband and out-of-band mps configs.
+ *
+ *         If this function can be integrated into the new functions.
+ *         We can remove this one.
+ *
+ * \param pSsc         spatial specific config handle.
+ * \param frameLength
+ * \param sampleRate
+ *
+ * \return  MPS_OK on sucess, and else on failure.
+ */
+static SACDEC_ERROR sscCheckInBand(SPATIAL_SPECIFIC_CONFIG *pSsc,
+                                   int frameLength, int sampleRate) {
+  SACDEC_ERROR err = MPS_OK;
+  int qmfBands;
+
+  FDK_ASSERT(pSsc != NULL);
+
+  /* check ssc for parse errors */
+  if (sscParseCheck(pSsc) != MPS_OK) {
+    err = MPS_PARSE_ERROR;
+  }
+
+  /* core fs and mps fs must match */
+  if (pSsc->samplingFreq != sampleRate) {
+    err = MPS_PARSE_ERROR /* MPEGSDEC_SSC_PARSE_ERROR */;
+  }
+
+  qmfBands = mpegSurroundDecoder_GetNrOfQmfBands(pSsc, pSsc->samplingFreq);
+
+  if (checkTimeSlots(frameLength, qmfBands, pSsc->nTimeSlots) != MPS_OK) {
+    err = MPS_PARSE_ERROR;
+  }
+
+  return err;
+}
+
+SACDEC_ERROR
+mpegSurroundDecoder_ConfigureQmfDomain(
+    CMpegSurroundDecoder *pMpegSurroundDecoder,
+    SAC_INPUT_CONFIG sac_dec_interface, UINT coreSamplingRate,
+    AUDIO_OBJECT_TYPE coreCodec) {
+  SACDEC_ERROR err = MPS_OK;
+  FDK_QMF_DOMAIN_GC *pGC = NULL;
+
+  if (pMpegSurroundDecoder == NULL) {
+    return MPS_INVALID_HANDLE;
+  }
+
+  FDK_ASSERT(pMpegSurroundDecoder->pSpatialDec);
+
+  pGC = &pMpegSurroundDecoder->pQmfDomain->globalConf;
+  if (pMpegSurroundDecoder->mpegSurroundSscIsGlobalCfg) {
+    SPATIAL_SPECIFIC_CONFIG *pSSC =
+        &pMpegSurroundDecoder->spatialSpecificConfigBackup;
+    if (sac_dec_interface == SAC_INTERFACE_TIME) {
+      /* For SAC_INTERFACE_QMF these parameters are set by SBR. */
+      pGC->nBandsAnalysis_requested = mpegSurroundDecoder_GetNrOfQmfBands(
+          pSSC, coreSamplingRate); /* coreSamplingRate == outputSamplingRate for
+                                      SAC_INTERFACE_TIME */
+      pGC->nBandsSynthesis_requested = pGC->nBandsAnalysis_requested;
+      pGC->nInputChannels_requested =
+          fMax((UINT)pSSC->nInputChannels, (UINT)pGC->nInputChannels_requested);
+    }
+    pGC->nOutputChannels_requested =
+        fMax((UINT)pSSC->nOutputChannels, (UINT)pGC->nOutputChannels_requested);
+  } else {
+    if (sac_dec_interface == SAC_INTERFACE_TIME) {
+      /* For SAC_INTERFACE_QMF these parameters are set by SBR. */
+      pGC->nBandsAnalysis_requested = mpegSurroundDecoder_GetNrOfQmfBands(
+          NULL, coreSamplingRate); /* coreSamplingRate == outputSamplingRate for
+                                      SAC_INTERFACE_TIME */
+      pGC->nBandsSynthesis_requested = pGC->nBandsAnalysis_requested;
+      pGC->nInputChannels_requested =
+          pMpegSurroundDecoder->pSpatialDec->createParams.maxNumInputChannels;
+    }
+    pGC->nOutputChannels_requested =
+        pMpegSurroundDecoder->pSpatialDec->createParams.maxNumOutputChannels;
+  }
+  pGC->nQmfProcBands_requested = 64;
+  pGC->nQmfProcChannels_requested =
+      fMin((INT)pGC->nInputChannels_requested,
+           pMpegSurroundDecoder->pSpatialDec->createParams.maxNumInputChannels);
+
+  if (coreCodec == AOT_ER_AAC_ELD) {
+    pGC->flags_requested |= QMF_FLAG_MPSLDFB;
+    pGC->flags_requested &= ~QMF_FLAG_CLDFB;
+  }
+
+  return err;
+}
+
+/**
+ * \brief  Check out-of-band config
+ *
+ * \param pSsc         spatial specific config handle.
+ * \param coreCodec    core codec.
+ * \param sampleRate   sampling frequency.
+ *
+ * \return  errorStatus
+ */
+SACDEC_ERROR
+sscCheckOutOfBand(const SPATIAL_SPECIFIC_CONFIG *pSsc, const INT coreCodec,
+                  const INT sampleRate, const INT frameSize) {
+  FDK_ASSERT(pSsc != NULL);
+  int qmfBands = 0;
+
+  /* check ssc for parse errors */
+  if (sscParseCheck(pSsc) != MPS_OK) {
+    return MPS_PARSE_ERROR;
+  }
+
+  switch (coreCodec) {
+    case AOT_USAC:
+    case AOT_DRM_USAC:
+      /* ISO/IEC 23003-1:2007(E), Chapter 6.3.3, Support for lower and higher
+       * sampling frequencies */
+      if (pSsc->samplingFreq >= 55426) {
+        return MPS_PARSE_ERROR;
+      }
+      break;
+    case AOT_ER_AAC_LD:
+    case AOT_ER_AAC_ELD:
+      /* core fs and mps fs must match */
+      if (pSsc->samplingFreq != sampleRate) {
+        return MPS_PARSE_ERROR;
+      }
+
+      /* ISO/IEC 14496-3:2009 FDAM 3: Chapter 1.5.2.3, Levels for the Low Delay
+       * AAC v2 profile */
+      if (pSsc->samplingFreq > 48000) {
+        return MPS_PARSE_ERROR;
+      }
+
+      qmfBands = mpegSurroundDecoder_GetNrOfQmfBands(pSsc, pSsc->samplingFreq);
+      switch (frameSize) {
+        case 480:
+          if (!((qmfBands == 32) && (pSsc->nTimeSlots == 15))) {
+            return MPS_PARSE_ERROR;
+          }
+          break;
+        case 960:
+          if (!((qmfBands == 64) && (pSsc->nTimeSlots == 15))) {
+            return MPS_PARSE_ERROR;
+          }
+          break;
+        case 512:
+          if (!(((qmfBands == 32) && (pSsc->nTimeSlots == 16)) ||
+                ((qmfBands == 64) && (pSsc->nTimeSlots == 8)))) {
+            return MPS_PARSE_ERROR;
+          }
+          break;
+        case 1024:
+          if (!((qmfBands == 64) && (pSsc->nTimeSlots == 16))) {
+            return MPS_PARSE_ERROR;
+          }
+          break;
+        default:
+          return MPS_PARSE_ERROR;
+      }
+      break;
+    default:
+      return MPS_PARSE_ERROR;
+      break;
+  }
+
+  return MPS_OK;
+}
+
+/**
+ * \brief Decode MPEG Surround frame.
+ **/
+int mpegSurroundDecoder_ParseNoHeader(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, HANDLE_FDK_BITSTREAM hBs,
+    int *pMpsDataBits, int fGlobalIndependencyFlag) {
+  SACDEC_ERROR err = MPS_OK;
+  SPATIAL_SPECIFIC_CONFIG *sscParse;
+  int bitsAvail, numSacBits;
+
+  if (pMpegSurroundDecoder == NULL || hBs == NULL) {
+    return MPS_INVALID_HANDLE;
+  }
+
+  sscParse = &pMpegSurroundDecoder
+                  ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameParse];
+
+  bitsAvail = FDKgetValidBits(hBs);
+
+  /* First spatial specific config is parsed into spatialSpecificConfigBackup,
+   * second spatialSpecificConfigBackup is copied into
+   * spatialSpecificConfig[bsFrameDecode] */
+  if (pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameParse]) {
+    FDKmemcpy(sscParse, &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+              sizeof(SPATIAL_SPECIFIC_CONFIG));
+    pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameParse] =
+        MPEGS_SYNC_FOUND;
+  }
+
+  if (bitsAvail <= 0) {
+    err = MPS_PARSE_ERROR;
+  } else {
+    err = SpatialDecParseFrameData(
+        pMpegSurroundDecoder->pSpatialDec,
+        &pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameParse],
+        hBs, sscParse, (UPMIXTYPE)pMpegSurroundDecoder->upmixType,
+        fGlobalIndependencyFlag);
+    if (err == MPS_OK) {
+      pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameParse]
+          .newBsData = 1;
+    }
+  }
+
+  numSacBits = bitsAvail - (INT)FDKgetValidBits(hBs);
+
+  if (numSacBits > bitsAvail) {
+    pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameParse]
+        .newBsData = 0;
+    err = MPS_PARSE_ERROR;
+  }
+
+  *pMpsDataBits -= numSacBits;
+
+  return err;
+}
+
+/**
+ * \brief Check, if ancType is valid.
+ **/
+static int isValidAncType(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                          int ancType) {
+  int ret = 1;
+
+  if ((ancType != MPEGS_ANCTYPE_HEADER_AND_FRAME) &&
+      (ancType != MPEGS_ANCTYPE_FRAME)) {
+    ret = 0;
+  }
+
+  if (ret == 0) {
+    updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                    MPEGS_INIT_ERROR_PAYLOAD, MPEGS_SYNC_LOST,
+                                    MPEGS_STOP);
+  }
+
+  return (ret);
+}
+
+/**
+ * \brief Check, if ancStartStop is valid.
+ **/
+static int isValidAncStartStop(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                               int ancStartStop) {
+  int ret = 1;
+
+  switch (ancStartStop) {
+    case MPEGS_START:
+      /* Sequence start - start and continue - start not allowed */
+      if ((pMpegSurroundDecoder->ancStartStopPrev == MPEGS_START) ||
+          (pMpegSurroundDecoder->ancStartStopPrev == MPEGS_CONTINUE)) {
+        ret = 0;
+      }
+      break;
+
+    case MPEGS_STOP:
+      /* MPS payload of the previous frame must be valid if current type is stop
+         Sequence startstop - stop and stop - stop not allowed
+         Sequence startstop - continue and stop - continue are allowed */
+      if ((pMpegSurroundDecoder->ancStartStopPrev == MPEGS_STOP) ||
+          (pMpegSurroundDecoder->ancStartStopPrev == MPEGS_START_STOP)) {
+        ret = 0;
+      }
+      break;
+
+    case MPEGS_CONTINUE:
+    case MPEGS_START_STOP:
+      /* No error detection possible for this states */
+      break;
+  }
+
+  if (ret == 0) {
+    updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                    MPEGS_INIT_ERROR_PAYLOAD, MPEGS_SYNC_LOST,
+                                    MPEGS_STOP);
+  } else {
+    pMpegSurroundDecoder->ancStartStopPrev = (MPEGS_ANCSTARTSTOP)ancStartStop;
+  }
+
+  return (ret);
+}
+
+int mpegSurroundDecoder_Parse(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                              HANDLE_FDK_BITSTREAM hBs, int *pMpsDataBits,
+                              AUDIO_OBJECT_TYPE coreCodec, int sampleRate,
+                              int frameSize, int fGlobalIndependencyFlag) {
+  SACDEC_ERROR err = MPS_OK;
+  SPATIAL_SPECIFIC_CONFIG *sscParse;
+  SPATIAL_BS_FRAME *bsFrame;
+  HANDLE_FDK_BITSTREAM hMpsBsData = NULL;
+  FDK_BITSTREAM mpsBsData;
+  int mpsDataBits = *pMpsDataBits;
+  int mpsBsBits;
+  MPEGS_ANCTYPE ancType;
+  MPEGS_ANCSTARTSTOP ancStartStop;
+
+  if (pMpegSurroundDecoder == NULL) {
+    return MPS_INVALID_HANDLE;
+  }
+
+  FDK_ASSERT(pMpegSurroundDecoder->pSpatialDec);
+
+  mpsBsBits = (INT)FDKgetValidBits(hBs);
+
+  sscParse = &pMpegSurroundDecoder
+                  ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameParse];
+  bsFrame = &pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameParse];
+
+  /*
+     Find operation mode of mpeg surround decoder:
+     - MPEGS_OPMODE_EMM:            Mode: Enhanced Matrix Mode (Blind)
+     - MPEGS_OPMODE_MPS_PAYLOAD:    Mode: Normal, Stereo or Binaural
+     - MPEGS_OPMODE_NO_MPS_PAYLOAD: Mode: No MpegSurround Payload
+  */
+  {
+    /* Parse ancType and ancStartStop */
+    ancType = (MPEGS_ANCTYPE)FDKreadBits(hBs, 2);
+    ancStartStop = (MPEGS_ANCSTARTSTOP)FDKreadBits(hBs, 2);
+    mpsDataBits -= 4;
+
+    /* Set valid anc type flag, if ancType signals a payload with either header
+     * and frame or frame */
+    if (isValidAncType(pMpegSurroundDecoder, ancType)) {
+      /* Set valid anc startstop flag, if transmitted sequence is not illegal */
+      if (isValidAncStartStop(pMpegSurroundDecoder, ancStartStop)) {
+        switch (ancStartStop) {
+          case MPEGS_START:
+            /* Assuming that core coder frame size (AAC) is smaller than MPS
+               coder frame size. Save audio data for next frame. */
+            if (mpsDataBits > MPS_DATA_BUFFER_SIZE * 8) {
+              err = MPS_NOTOK;
+              goto bail;
+            }
+            for (int i = 0; i < mpsDataBits / 8; i++) {
+              pMpegSurroundDecoder->mpsData[i] = FDKreadBits(hBs, 8);
+            }
+            pMpegSurroundDecoder->mpsDataBits = mpsDataBits;
+            break;
+
+          case MPEGS_CONTINUE:
+          case MPEGS_STOP:
+            /* Assuming that core coder frame size (AAC) is smaller than MPS
+               coder frame size. Save audio data for next frame. */
+            if ((pMpegSurroundDecoder->mpsDataBits + mpsDataBits) >
+                MPS_DATA_BUFFER_SIZE * 8) {
+              err = MPS_NOTOK;
+              goto bail;
+            }
+            for (int i = 0; i < mpsDataBits / 8; i++) {
+              pMpegSurroundDecoder
+                  ->mpsData[(pMpegSurroundDecoder->mpsDataBits / 8) + i] =
+                  FDKreadBits(hBs, 8);
+            }
+            pMpegSurroundDecoder->mpsDataBits += mpsDataBits;
+            FDKinitBitStream(&mpsBsData, pMpegSurroundDecoder->mpsData,
+                             MAX_BUFSIZE_BYTES,
+                             pMpegSurroundDecoder->mpsDataBits, BS_READER);
+            hMpsBsData = &mpsBsData;
+            break;
+
+          case MPEGS_START_STOP:
+            pMpegSurroundDecoder->mpsDataBits = mpsDataBits;
+            hMpsBsData = hBs;
+            break;
+
+          default:
+            FDK_ASSERT(0);
+        }
+
+        if ((ancStartStop == MPEGS_STOP) ||
+            (ancStartStop == MPEGS_START_STOP)) {
+          switch (ancType) {
+            case MPEGS_ANCTYPE_HEADER_AND_FRAME: {
+              int parseResult, bitsRead;
+              SPATIAL_SPECIFIC_CONFIG spatialSpecificConfigTmp =
+                  pMpegSurroundDecoder->spatialSpecificConfigBackup;
+
+              /* Parse spatial specific config */
+              bitsRead = (INT)FDKgetValidBits(hMpsBsData);
+
+              err = SpatialDecParseSpecificConfigHeader(
+                  hMpsBsData,
+                  &pMpegSurroundDecoder->spatialSpecificConfigBackup, coreCodec,
+                  pMpegSurroundDecoder->upmixType);
+
+              bitsRead = (bitsRead - (INT)FDKgetValidBits(hMpsBsData));
+              parseResult = ((err == MPS_OK) ? bitsRead : -bitsRead);
+
+              if (parseResult < 0) {
+                parseResult = -parseResult;
+                err = MPS_PARSE_ERROR;
+              } else if (err == MPS_OK) {
+                /* Check SSC for consistency (e.g. bit errors could cause
+                 * trouble) */
+                err = sscCheckInBand(
+                    &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+                    frameSize, sampleRate);
+              }
+              if (err != MPS_OK) {
+                pMpegSurroundDecoder->spatialSpecificConfigBackup =
+                    spatialSpecificConfigTmp;
+                break;
+              }
+
+              pMpegSurroundDecoder->mpsDataBits -= parseResult;
+
+              /* Initiate re-initialization, if header has changed */
+              if (FDK_SpatialDecCompareSpatialSpecificConfigHeader(
+                      &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+                      sscParse) == MPS_UNEQUAL_SSC) {
+                pMpegSurroundDecoder
+                    ->initFlags[pMpegSurroundDecoder->bsFrameParse] |=
+                    MPEGS_INIT_CHANGE_HEADER;
+                SpatialDecInitParserContext(pMpegSurroundDecoder->pSpatialDec);
+                /* We found a valid in-band configuration. Therefore any
+                 * previous config is invalid now. */
+                pMpegSurroundDecoder->mpegSurroundSscIsGlobalCfg = 0;
+              }
+            }
+              FDK_FALLTHROUGH;
+            case MPEGS_ANCTYPE_FRAME:
+
+              if (pMpegSurroundDecoder
+                      ->initFlags[pMpegSurroundDecoder->bsFrameParse] &
+                  MPEGS_INIT_ERROR_PAYLOAD) {
+                err = MPS_PARSE_ERROR;
+                break;
+              }
+
+              /* First spatial specific config is parsed into
+               * spatialSpecificConfigBackup, second spatialSpecificConfigBackup
+               * is copied into spatialSpecificConfig[bsFrameDecode] */
+              if (pMpegSurroundDecoder
+                      ->initFlags[pMpegSurroundDecoder->bsFrameParse]) {
+                FDKmemcpy(sscParse,
+                          &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+                          sizeof(SPATIAL_SPECIFIC_CONFIG));
+                pMpegSurroundDecoder
+                    ->fOnSync[pMpegSurroundDecoder->bsFrameParse] =
+                    MPEGS_SYNC_FOUND;
+              }
+
+              if (pMpegSurroundDecoder
+                      ->fOnSync[pMpegSurroundDecoder->bsFrameParse] >=
+                  MPEGS_SYNC_FOUND) {
+                int nbits = 0, bitsAvail;
+
+                if (err != MPS_OK) {
+                  break;
+                }
+
+                bitsAvail = FDKgetValidBits(hMpsBsData);
+
+                if (bitsAvail <= 0) {
+                  err = MPS_PARSE_ERROR;
+                } else {
+                  err = SpatialDecParseFrameData(
+                      pMpegSurroundDecoder->pSpatialDec, bsFrame, hMpsBsData,
+                      sscParse, (UPMIXTYPE)pMpegSurroundDecoder->upmixType,
+                      fGlobalIndependencyFlag);
+                  if (err == MPS_OK) {
+                    bsFrame->newBsData = 1;
+                  }
+                }
+
+                nbits = bitsAvail - (INT)FDKgetValidBits(hMpsBsData);
+
+                if ((nbits > bitsAvail) ||
+                    (nbits > pMpegSurroundDecoder->mpsDataBits) ||
+                    (pMpegSurroundDecoder->mpsDataBits > nbits + 7 &&
+                     !IS_LOWDELAY(coreCodec))) {
+                  bsFrame->newBsData = 0;
+                  err = MPS_PARSE_ERROR;
+                  break;
+                }
+                pMpegSurroundDecoder->mpsDataBits -= nbits;
+              }
+              break;
+
+            default: /* added to avoid compiler warning */
+              err = MPS_NOTOK;
+              break; /* added to avoid compiler warning */
+          }          /* switch (ancType) */
+
+          if (err == MPS_OK) {
+            pMpegSurroundDecoder->ancStartStopPrev = ancStartStop;
+          } else {
+            updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                            MPEGS_INIT_ERROR_PAYLOAD,
+                                            MPEGS_SYNC_LOST, MPEGS_STOP);
+            pMpegSurroundDecoder->mpsDataBits = 0;
+          }
+        } /* (ancStartStop == MPEGS_STOP) || (ancStartStop == MPEGS_START_STOP)
+           */
+      }   /* validAncStartStop */
+    }     /* validAncType */
+  }
+
+bail:
+
+  *pMpsDataBits -= (mpsBsBits - (INT)FDKgetValidBits(hBs));
+
+  return err;
+}
+
+int mpegSurroundDecoder_Apply(CMpegSurroundDecoder *pMpegSurroundDecoder,
+                              INT_PCM *input, PCM_MPS *pTimeData,
+                              const int timeDataSize, int timeDataFrameSize,
+                              int *nChannels, int *frameSize, int sampleRate,
+                              AUDIO_OBJECT_TYPE coreCodec,
+                              AUDIO_CHANNEL_TYPE channelType[],
+                              UCHAR channelIndices[],
+                              const FDK_channelMapDescr *const mapDescr) {
+  SACDEC_ERROR err = MPS_OK;
+  PCM_MPS *pTimeOut = pTimeData;
+  UINT initControlFlags = 0, controlFlags = 0;
+  int timeDataRequiredSize = 0;
+  int newData;
+
+  if (pMpegSurroundDecoder == NULL) {
+    return MPS_INVALID_HANDLE;
+  }
+
+  FDK_ASSERT(pMpegSurroundDecoder->pSpatialDec);
+
+  if (!FDK_chMapDescr_isValid(mapDescr)) {
+    return MPS_INVALID_HANDLE;
+  }
+
+  if ((*nChannels <= 0) || (*nChannels > 2)) {
+    return MPS_NOTOK;
+  }
+
+  pMpegSurroundDecoder->pSpatialDec->pConfigCurrent =
+      &pMpegSurroundDecoder
+           ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameDecode];
+  newData = pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameParse]
+                .newBsData;
+
+  switch (mpegSurroundOperationMode(pMpegSurroundDecoder, 1000)) {
+    case MPEGS_OPMODE_MPS_PAYLOAD:
+      if (pMpegSurroundDecoder
+              ->initFlags[pMpegSurroundDecoder->bsFrameDecode]) {
+        err = initMpegSurroundDecoder(pMpegSurroundDecoder);
+      }
+
+      if (err == MPS_OK) {
+        if ((pMpegSurroundDecoder
+                 ->fOnSync[pMpegSurroundDecoder->bsFrameDecode] !=
+             MPEGS_SYNC_COMPLETE) &&
+            (pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameDecode]
+                 .bsIndependencyFlag == 1)) {
+          /* We got a valid header and independently decodeable frame data.
+              -> Go to the next sync level and start processing. */
+          pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+              MPEGS_SYNC_COMPLETE;
+        }
+      } else {
+        /* We got a valid config header but found an error while parsing the
+           bitstream. Wait for the next independent frame and apply error
+           conealment in the meantime. */
+        pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+            MPEGS_SYNC_FOUND;
+        controlFlags |= MPEGS_CONCEAL;
+        err = MPS_OK;
+      }
+      /*
+         Concealment:
+         - Bitstream is available, no sync found during bitstream processing
+         - Bitstream is available, sync lost due to corrupted bitstream
+         - Bitstream is available, sync found but no independent frame
+      */
+      if (pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] !=
+          MPEGS_SYNC_COMPLETE) {
+        controlFlags |= MPEGS_CONCEAL;
+      }
+      break;
+
+    case MPEGS_OPMODE_NO_MPS_PAYLOAD:
+      /* Concealment: No bitstream is available */
+      controlFlags |= MPEGS_CONCEAL;
+      break;
+
+    default:
+      err = MPS_NOTOK;
+  }
+
+  if (err != MPS_OK) {
+    goto bail;
+  }
+
+  /*
+   * Force BypassMode if choosen by user
+   */
+  if (pMpegSurroundDecoder->mpegSurroundUserParams.bypassMode) {
+    controlFlags |= MPEGS_BYPASSMODE;
+  }
+
+  if (pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode]) {
+    int startWithDfltCfg = 0;
+    /*
+     * Init with a default configuration if we came here and are still not
+     * initialized.
+     */
+    if (pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] &
+        MPEGS_INIT_ENFORCE_REINIT) {
+      /* Get default spatial specific config */
+      if (FDK_SpatialDecInitDefaultSpatialSpecificConfig(
+              &pMpegSurroundDecoder->spatialSpecificConfigBackup, coreCodec,
+              *nChannels, sampleRate,
+              *frameSize /
+                  mpegSurroundDecoder_GetNrOfQmfBands(NULL, sampleRate),
+              pMpegSurroundDecoder->mpegSurroundDecoderLevel,
+              pMpegSurroundDecoder->mpegSurroundUserParams.blindEnable)) {
+        err = MPS_NOTOK;
+        goto bail;
+      }
+
+      /* Initiate re-initialization, if header has changed */
+      if (FDK_SpatialDecCompareSpatialSpecificConfigHeader(
+              &pMpegSurroundDecoder->spatialSpecificConfigBackup,
+              &pMpegSurroundDecoder->spatialSpecificConfig
+                   [pMpegSurroundDecoder->bsFrameDecode]) == MPS_UNEQUAL_SSC) {
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_HEADER;
+        SpatialDecInitParserContext(pMpegSurroundDecoder->pSpatialDec);
+      }
+
+      startWithDfltCfg = 1;
+    }
+
+    /* First spatial specific config is parsed into spatialSpecificConfigBackup,
+     * second spatialSpecificConfigBackup is copied into spatialSpecificConfig
+     */
+    err = initMpegSurroundDecoder(pMpegSurroundDecoder);
+
+    if (startWithDfltCfg) {
+      /* initialized with default config, but no sync found */
+      /* maybe use updateMpegSurroundDecoderStatus later on */
+      pMpegSurroundDecoder->fOnSync[pMpegSurroundDecoder->bsFrameDecode] =
+          MPEGS_SYNC_LOST;
+    }
+
+    /* Since we do not have state MPEGS_SYNC_COMPLETE apply concealment */
+    controlFlags |= MPEGS_CONCEAL;
+
+    if (err != MPS_OK) {
+      goto bail;
+    }
+  }
+
+  /*
+   * Process MPEG Surround Audio
+   */
+  initControlFlags = controlFlags;
+
+  /* Check that provided output buffer is large enough. */
+  if (pMpegSurroundDecoder->pQmfDomain->globalConf.nBandsAnalysis == 0) {
+    err = MPS_UNSUPPORTED_FORMAT;
+    goto bail;
+  }
+  timeDataRequiredSize =
+      (timeDataFrameSize *
+       pMpegSurroundDecoder->pSpatialDec->numOutputChannelsAT *
+       pMpegSurroundDecoder->pQmfDomain->globalConf.nBandsSynthesis) /
+      pMpegSurroundDecoder->pQmfDomain->globalConf.nBandsAnalysis;
+  if (timeDataSize < timeDataRequiredSize) {
+    err = MPS_OUTPUT_BUFFER_TOO_SMALL;
+    goto bail;
+  }
+
+  if ((pMpegSurroundDecoder->pSpatialDec->pConfigCurrent->syntaxFlags &
+       SACDEC_SYNTAX_USAC) &&
+      (pMpegSurroundDecoder->pSpatialDec->stereoConfigIndex > 1)) {
+    FDK_ASSERT(timeDataRequiredSize >= timeDataFrameSize * *nChannels);
+    /* Place samples comprising QMF time slots spaced at QMF output Band raster
+     * to allow slot wise processing */
+    int timeDataFrameSizeOut =
+        (timeDataFrameSize *
+         pMpegSurroundDecoder->pQmfDomain->globalConf.nBandsSynthesis) /
+        pMpegSurroundDecoder->pQmfDomain->globalConf.nBandsAnalysis;
+    pMpegSurroundDecoder->pQmfDomain->globalConf.TDinput =
+        pTimeData + timeDataFrameSizeOut - timeDataFrameSize;
+    for (int i = *nChannels - 1; i >= 0; i--) {
+      FDKmemmove(pTimeData + (i + 1) * timeDataFrameSizeOut - timeDataFrameSize,
+                 pTimeData + timeDataFrameSize * i,
+                 sizeof(PCM_MPS) * timeDataFrameSize);
+      FDKmemclear(pTimeData + i * timeDataFrameSizeOut,
+                  sizeof(PCM_MPS) * (timeDataFrameSizeOut - timeDataFrameSize));
+    }
+  } else {
+    if (pMpegSurroundDecoder->mpegSurroundUseTimeInterface) {
+      FDKmemcpy(input, pTimeData,
+                sizeof(INT_PCM) * (*nChannels) * (*frameSize));
+      pMpegSurroundDecoder->pQmfDomain->globalConf.TDinput = input;
+    }
+  }
+
+  /*
+   * Process MPEG Surround Audio
+   */
+  err = SpatialDecApplyFrame(
+      pMpegSurroundDecoder->pSpatialDec,
+      &pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameDecode],
+      pMpegSurroundDecoder->mpegSurroundUseTimeInterface ? INPUTMODE_TIME
+                                                         : INPUTMODE_QMF_SBR,
+      pMpegSurroundDecoder->pQmfDomain->globalConf.TDinput, NULL, NULL,
+      pTimeOut, *frameSize, &controlFlags, *nChannels, mapDescr);
+  *nChannels = pMpegSurroundDecoder->pSpatialDec->numOutputChannelsAT;
+
+  if (err !=
+      MPS_OK) { /* A fatal error occured. Go back to start and try again: */
+    updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                    MPEGS_INIT_ENFORCE_REINIT, MPEGS_SYNC_LOST,
+                                    MPEGS_STOP);
+    *frameSize =
+        0; /* Declare that framework can not use the data in pTimeOut. */
+  } else {
+    if (((controlFlags & MPEGS_CONCEAL) &&
+         !(initControlFlags & MPEGS_CONCEAL)) ||
+        (pMpegSurroundDecoder->pSpatialDec->errInt !=
+         MPS_OK)) { /* Account for errors that occured in
+                       SpatialDecApplyFrame(): */
+      updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                      MPEGS_INIT_ERROR_PAYLOAD, MPEGS_SYNC_LOST,
+                                      MPEGS_STOP);
+    }
+  }
+
+  if ((err == MPS_OK) && !(controlFlags & MPEGS_BYPASSMODE) &&
+      !(pMpegSurroundDecoder->upmixType == UPMIX_TYPE_BYPASS)) {
+    SpatialDecChannelProperties(pMpegSurroundDecoder->pSpatialDec, channelType,
+                                channelIndices, mapDescr);
+  }
+
+bail:
+
+  if (newData) {
+    /* numParameterSetsPrev shall only be read in the decode process, because of
+       that we can update this state variable here */
+    pMpegSurroundDecoder->pSpatialDec->numParameterSetsPrev =
+        pMpegSurroundDecoder->bsFrames[pMpegSurroundDecoder->bsFrameDecode]
+            .numParameterSets;
+  }
+
+  return (err);
+}
+
+/**
+ * \brief Free config dependent MPEG Surround memory.
+ **/
+SACDEC_ERROR mpegSurroundDecoder_FreeMem(
+    CMpegSurroundDecoder *pMpegSurroundDecoder) {
+  SACDEC_ERROR err = MPS_OK;
+
+  if (pMpegSurroundDecoder != NULL) {
+    FDK_SpatialDecClose(pMpegSurroundDecoder->pSpatialDec);
+    pMpegSurroundDecoder->pSpatialDec = NULL;
+  }
+
+  return err;
+}
+
+/**
+ * \brief Close MPEG Surround decoder.
+ **/
+void mpegSurroundDecoder_Close(CMpegSurroundDecoder *pMpegSurroundDecoder) {
+  if (pMpegSurroundDecoder != NULL) {
+    FDK_SpatialDecClose(pMpegSurroundDecoder->pSpatialDec);
+    pMpegSurroundDecoder->pSpatialDec = NULL;
+
+    for (int i = 0; i < 1; i++) {
+      SpatialDecCloseBsFrame(&pMpegSurroundDecoder->bsFrames[i]);
+    }
+
+    FDK_FREE_MEMORY_1D(pMpegSurroundDecoder);
+  }
+}
+
+#define SACDEC_VL0 2
+#define SACDEC_VL1 0
+#define SACDEC_VL2 0
+
+int mpegSurroundDecoder_GetLibInfo(LIB_INFO *info) {
+  int i;
+
+  if (info == NULL) {
+    return -1;
+  }
+
+  /* search for next free tab */
+  for (i = 0; i < FDK_MODULE_LAST; i++) {
+    if (info[i].module_id == FDK_NONE) break;
+  }
+  if (i == FDK_MODULE_LAST) return -1;
+
+  info += i;
+
+  info->module_id = FDK_MPSDEC;
+#ifdef __ANDROID__
+  info->build_date = "";
+  info->build_time = "";
+#else
+  info->build_date = __DATE__;
+  info->build_time = __TIME__;
+#endif
+  info->title = "MPEG Surround Decoder";
+  info->version = LIB_VERSION(SACDEC_VL0, SACDEC_VL1, SACDEC_VL2);
+  LIB_VERSION_STRING(info);
+  info->flags = 0 | CAPF_MPS_LD | CAPF_MPS_USAC | CAPF_MPS_HQ |
+                CAPF_MPS_1CH_IN | CAPF_MPS_2CH_OUT; /* end flags */
+
+  return 0;
+}
+
+SACDEC_ERROR mpegSurroundDecoder_SetParam(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, const SACDEC_PARAM param,
+    const INT value) {
+  SACDEC_ERROR err = MPS_OK;
+  SPATIALDEC_PARAM *pUserParams = NULL;
+
+  /* check decoder handle */
+  if (pMpegSurroundDecoder != NULL) {
+    /* init local shortcuts */
+    pUserParams = &pMpegSurroundDecoder->mpegSurroundUserParams;
+  } else {
+    err = MPS_INVALID_HANDLE;
+    /* check the parameter values before exiting. */
+  }
+
+  /* apply param value */
+  switch (param) {
+    case SACDEC_OUTPUT_MODE:
+      switch ((SAC_DEC_OUTPUT_MODE)value) {
+        case SACDEC_OUT_MODE_NORMAL:
+        case SACDEC_OUT_MODE_STEREO:
+          break;
+        default:
+          err = MPS_INVALID_PARAMETER;
+      }
+      if (err == MPS_OK) {
+        if (0) {
+          err = MPS_INVALID_PARAMETER;
+        } else if (pUserParams->outputMode != (UCHAR)value) {
+          pUserParams->outputMode = (UCHAR)value;
+          pMpegSurroundDecoder
+              ->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+              MPEGS_INIT_CHANGE_OUTPUT_MODE;
+        }
+      }
+      break;
+
+    case SACDEC_INTERFACE:
+      if (value < 0 || value > 1) {
+        err = MPS_INVALID_PARAMETER;
+      }
+      if (err != MPS_OK) {
+        goto bail;
+      }
+      if (pMpegSurroundDecoder->mpegSurroundUseTimeInterface != (UCHAR)value) {
+        pMpegSurroundDecoder->mpegSurroundUseTimeInterface = (UCHAR)value;
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_TIME_FREQ_INTERFACE;
+      }
+      break;
+
+    case SACDEC_BS_INTERRUPTION:
+      if ((err == MPS_OK) && (value != 0)) {
+        updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                        MPEGS_INIT_BS_INTERRUPTION,
+                                        MPEGS_SYNC_LOST, MPEGS_STOP);
+      }
+      break;
+
+    case SACDEC_CLEAR_HISTORY:
+      if ((err == MPS_OK) && (value != 0)) {
+        /* Just reset the states and go on. */
+        updateMpegSurroundDecoderStatus(pMpegSurroundDecoder,
+                                        MPEGS_INIT_CLEAR_HISTORY,
+                                        MPEGS_SYNC_LOST, MPEGS_STOP);
+      }
+      break;
+
+    case SACDEC_CONCEAL_NUM_KEEP_FRAMES:
+      if (value < 0) { /* Check valid value range */
+        err = MPS_INVALID_PARAMETER;
+      }
+      if (err != MPS_OK) {
+        goto bail;
+      }
+      if (pUserParams->concealNumKeepFrames != (UINT)value) {
+        pUserParams->concealNumKeepFrames = (UINT)value;
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_CONCEAL_PARAMS;
+      }
+      break;
+
+    case SACDEC_CONCEAL_FADE_OUT_SLOPE_LENGTH:
+      if (value < 0) { /* Check valid value range */
+        err = MPS_INVALID_PARAMETER;
+      }
+      if (err != MPS_OK) {
+        goto bail;
+      }
+      if (pUserParams->concealFadeOutSlopeLength != (UINT)value) {
+        pUserParams->concealFadeOutSlopeLength = (UINT)value;
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_CONCEAL_PARAMS;
+      }
+      break;
+
+    case SACDEC_CONCEAL_FADE_IN_SLOPE_LENGTH:
+      if (value < 0) { /* Check valid value range */
+        err = MPS_INVALID_PARAMETER;
+      }
+      if (err != MPS_OK) {
+        goto bail;
+      }
+      if (pUserParams->concealFadeInSlopeLength != (UINT)value) {
+        pUserParams->concealFadeInSlopeLength = (UINT)value;
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_CONCEAL_PARAMS;
+      }
+      break;
+
+    case SACDEC_CONCEAL_NUM_RELEASE_FRAMES:
+      if (value < 0) { /* Check valid value range */
+        err = MPS_INVALID_PARAMETER;
+      }
+      if (err != MPS_OK) {
+        goto bail;
+      }
+      if (pUserParams->concealNumReleaseFrames != (UINT)value) {
+        pUserParams->concealNumReleaseFrames = (UINT)value;
+        pMpegSurroundDecoder->initFlags[pMpegSurroundDecoder->bsFrameDecode] |=
+            MPEGS_INIT_CHANGE_CONCEAL_PARAMS;
+      }
+      break;
+
+    default:
+      err = MPS_INVALID_PARAMETER;
+      break;
+  } /* switch(param) */
+
+bail:
+  return err;
+}
+
+SACDEC_ERROR mpegSurroundDecoder_IsPseudoLR(
+    CMpegSurroundDecoder *pMpegSurroundDecoder, int *bsPseudoLr) {
+  if (pMpegSurroundDecoder != NULL) {
+    const SPATIAL_SPECIFIC_CONFIG *sscDecode =
+        &pMpegSurroundDecoder
+             ->spatialSpecificConfig[pMpegSurroundDecoder->bsFrameDecode];
+    *bsPseudoLr = (int)sscDecode->bsPseudoLr;
+    return MPS_OK;
+  } else
+    return MPS_INVALID_HANDLE;
+}
+
+/**
+ * \brief Get the signal delay caused by the MPEG Surround decoder module.
+ **/
+UINT mpegSurroundDecoder_GetDelay(const CMpegSurroundDecoder *self) {
+  INT outputDelay = 0;
+
+  if (self != NULL) {
+    const SPATIAL_SPECIFIC_CONFIG *sscDecode =
+        &self->spatialSpecificConfig[self->bsFrameDecode];
+    AUDIO_OBJECT_TYPE coreCodec = sscDecode->coreCodec;
+
+    /* See chapter 4.5 (delay and synchronization) of ISO/IEC FDIS 23003-1 and
+       chapter 5.4.3 of ISO/IEC FDIS 23003-2 for details on the following
+       figures. */
+
+    if (coreCodec > AOT_NULL_OBJECT) {
+      if (IS_LOWDELAY(coreCodec)) {
+        /* All low delay variants (ER-AAC-(E)LD): */
+        outputDelay += 256;
+      } else if (!IS_USAC(coreCodec)) {
+        /* By the method of elimination this is the GA (AAC-LC, HE-AAC, ...)
+         * branch: */
+        outputDelay += 320 + 257; /* cos to exp delay + QMF synthesis */
+        if (self->mpegSurroundUseTimeInterface) {
+          outputDelay += 320 + 384; /* QMF and hybrid analysis */
+        }
+      }
+    }
+  }
+
+  return (outputDelay);
+}
diff --git a/fdk-aac/libSACdec/src/sac_dec_ssc_struct.h b/fdk-aac/libSACdec/src/sac_dec_ssc_struct.h
new file mode 100644
index 0000000..b67b465
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_dec_ssc_struct.h
@@ -0,0 +1,283 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: interface - spatial specific config struct
+
+*******************************************************************************/
+
+#ifndef SAC_DEC_SSC_STRUCT_H
+#define SAC_DEC_SSC_STRUCT_H
+
+#include "FDK_audio.h"
+
+#define MAX_NUM_QMF_BANDS (128)
+#define MAX_TIME_SLOTS 64
+#define MAX_INPUT_CHANNELS 1
+#define MAX_OUTPUT_CHANNELS                                             \
+  2 /* CAUTION: This does NOT restrict the number of                    \
+                            output channels exclusively! In addition it \
+       affects the max number of bitstream and residual channels! */
+#define MAX_NUM_OTT (5)
+#define MAX_NUM_TTT (0)
+#define MAX_NUM_EXT_TYPES (8)
+#define MAX_PARAMETER_BANDS (28)
+#define MAX_PARAMETER_BANDS_LD (23)
+
+#define MAX_NUM_XCHANNELS (6)
+
+#define MAX_ARBITRARY_TREE_LEVELS (0)
+
+typedef enum {
+  /* CAUTION: Do not change enum values! */
+  SPATIALDEC_FREQ_RES_40 = 40,
+  SPATIALDEC_FREQ_RES_28 = 28,
+  SPATIALDEC_FREQ_RES_23 = 23,
+  SPATIALDEC_FREQ_RES_20 = 20,
+  SPATIALDEC_FREQ_RES_15 = 15,
+  SPATIALDEC_FREQ_RES_14 = 14,
+  SPATIALDEC_FREQ_RES_12 = 12,
+  SPATIALDEC_FREQ_RES_10 = 10,
+  SPATIALDEC_FREQ_RES_9 = 9,
+  SPATIALDEC_FREQ_RES_7 = 7,
+  SPATIALDEC_FREQ_RES_5 = 5,
+  SPATIALDEC_FREQ_RES_4 = 4
+
+} SPATIALDEC_FREQ_RES;
+
+typedef enum {
+
+  SPATIALDEC_QUANT_FINE_DEF = 0,
+  SPATIALDEC_QUANT_EDQ1 = 1,
+  SPATIALDEC_QUANT_EDQ2 = 2,
+  SPATIALDEC_QUANT_RSVD3 = 3,
+  SPATIALDEC_QUANT_RSVD4 = 4,
+  SPATIALDEC_QUANT_RSVD5 = 5,
+  SPATIALDEC_QUANT_RSVD6 = 6,
+  SPATIALDEC_QUANT_RSVD7 = 7
+
+} SPATIALDEC_QUANT_MODE;
+
+typedef enum { SPATIALDEC_MODE_RSVD7 = 7 } SPATIALDEC_TREE_CONFIG;
+
+typedef enum {
+
+  SPATIALDEC_GAIN_MODE0 = 0,
+  SPATIALDEC_GAIN_RSVD1 = 1,
+  SPATIALDEC_GAIN_RSVD2 = 2,
+  SPATIALDEC_GAIN_RSVD3 = 3,
+  SPATIALDEC_GAIN_RSVD4 = 4,
+  SPATIALDEC_GAIN_RSVD5 = 5,
+  SPATIALDEC_GAIN_RSVD6 = 6,
+  SPATIALDEC_GAIN_RSVD7 = 7,
+  SPATIALDEC_GAIN_RSVD8 = 8,
+  SPATIALDEC_GAIN_RSVD9 = 9,
+  SPATIALDEC_GAIN_RSVD10 = 10,
+  SPATIALDEC_GAIN_RSVD11 = 11,
+  SPATIALDEC_GAIN_RSVD12 = 12,
+  SPATIALDEC_GAIN_RSVD13 = 13,
+  SPATIALDEC_GAIN_RSVD14 = 14,
+  SPATIALDEC_GAIN_RSVD15 = 15
+
+} SPATIALDEC_FIXED_GAINS;
+
+typedef enum {
+
+  SPATIALDEC_TS_TPNOWHITE = 0,
+  SPATIALDEC_TS_TPWHITE = 1,
+  SPATIALDEC_TS_TES = 2,
+  SPATIALDEC_TS_NOTS = 3,
+  SPATIALDEC_TS_RSVD4 = 4,
+  SPATIALDEC_TS_RSVD5 = 5,
+  SPATIALDEC_TS_RSVD6 = 6,
+  SPATIALDEC_TS_RSVD7 = 7,
+  SPATIALDEC_TS_RSVD8 = 8,
+  SPATIALDEC_TS_RSVD9 = 9,
+  SPATIALDEC_TS_RSVD10 = 10,
+  SPATIALDEC_TS_RSVD11 = 11,
+  SPATIALDEC_TS_RSVD12 = 12,
+  SPATIALDEC_TS_RSVD13 = 13,
+  SPATIALDEC_TS_RSVD14 = 14,
+  SPATIALDEC_TS_RSVD15 = 15
+
+} SPATIALDEC_TS_CONF;
+
+typedef enum {
+
+  SPATIALDEC_DECORR_MODE0 = 0,
+  SPATIALDEC_DECORR_MODE1 = 1,
+  SPATIALDEC_DECORR_MODE2 = 2,
+  SPATIALDEC_DECORR_RSVD3 = 3,
+  SPATIALDEC_DECORR_RSVD4 = 4,
+  SPATIALDEC_DECORR_RSVD5 = 5,
+  SPATIALDEC_DECORR_RSVD6 = 6,
+  SPATIALDEC_DECORR_RSVD7 = 7,
+  SPATIALDEC_DECORR_RSVD8 = 8,
+  SPATIALDEC_DECORR_RSVD9 = 9,
+  SPATIALDEC_DECORR_RSVD10 = 10,
+  SPATIALDEC_DECORR_RSVD11 = 11,
+  SPATIALDEC_DECORR_RSVD12 = 12,
+  SPATIALDEC_DECORR_RSVD13 = 13,
+  SPATIALDEC_DECORR_RSVD14 = 14,
+  SPATIALDEC_DECORR_RSVD15 = 15
+
+} SPATIALDEC_DECORR_CONF;
+
+typedef struct T_SPATIALDEC_OTT_CONF {
+  int nOttBands;
+
+} SPATIALDEC_OTT_CONF;
+
+typedef struct T_SPATIALDEC_RESIDUAL_CONF {
+  int bResidualPresent;
+  int nResidualBands;
+
+} SPATIALDEC_RESIDUAL_CONF;
+
+typedef struct T_SPATIAL_SPECIFIC_CONFIG {
+  UINT syntaxFlags;
+  int samplingFreq;
+  int nTimeSlots;
+  SPATIALDEC_FREQ_RES freqRes;
+  SPATIALDEC_TREE_CONFIG treeConfig;
+  SPATIALDEC_QUANT_MODE quantMode;
+  int bArbitraryDownmix;
+
+  int bResidualCoding;
+  SPATIALDEC_FIXED_GAINS bsFixedGainDMX;
+
+  SPATIALDEC_TS_CONF tempShapeConfig;
+  SPATIALDEC_DECORR_CONF decorrConfig;
+
+  int nInputChannels;  /* derived from  treeConfig */
+  int nOutputChannels; /* derived from  treeConfig */
+
+  /* ott config */
+  int nOttBoxes;                              /* derived from  treeConfig */
+  SPATIALDEC_OTT_CONF OttConfig[MAX_NUM_OTT]; /* dimension nOttBoxes */
+
+  /* ttt config */
+  int nTttBoxes; /* derived from  treeConfig */
+
+  /* residual config */
+  SPATIALDEC_RESIDUAL_CONF
+  ResidualConfig[MAX_NUM_OTT +
+                 MAX_NUM_TTT]; /* dimension (nOttBoxes + nTttBoxes) */
+
+  int sacExtCnt;
+  int sacExtType[MAX_NUM_EXT_TYPES];
+  int envQuantMode;
+
+  AUDIO_OBJECT_TYPE coreCodec;
+
+  UCHAR stereoConfigIndex;
+  UCHAR coreSbrFrameLengthIndex; /* Table 70 in ISO/IEC FDIS 23003-3:2011 */
+  UCHAR bsHighRateMode;
+  UCHAR bsDecorrType;
+  UCHAR bsPseudoLr;
+  UCHAR bsPhaseCoding;
+  UCHAR bsOttBandsPhasePresent;
+  int bsOttBandsPhase;
+
+  SCHAR ottCLDdefault[MAX_NUM_OTT];
+  UCHAR numOttBandsIPD;
+  UCHAR bitstreamOttBands[MAX_NUM_OTT];
+  UCHAR numOttBands[MAX_NUM_OTT];
+
+} SPATIAL_SPECIFIC_CONFIG;
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_process.cpp b/fdk-aac/libSACdec/src/sac_process.cpp
new file mode 100644
index 0000000..56c72ad
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_process.cpp
@@ -0,0 +1,1066 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Processing
+
+*******************************************************************************/
+
+/* data structures and interfaces for spatial audio reference software */
+#include "sac_process.h"
+
+#include "sac_bitdec.h"
+#include "sac_calcM1andM2.h"
+#include "sac_smoothing.h"
+#include "sac_rom.h"
+
+#include "sac_dec_errorcodes.h"
+
+#include "FDK_trigFcts.h"
+#include "FDK_decorrelate.h"
+
+/**
+ * \brief  Linear interpolation between two parameter values.
+ *         a*alpha + b*(1-alpha)
+ *       = a*alpha + b - b*alpha
+ *
+ * \param alpha               Weighting factor.
+ * \param a                   Parameter a.
+ * \param b                   Parameter b.
+ *
+ * \return Interpolated parameter value.
+ */
+FDK_INLINE FIXP_DBL interpolateParameter(const FIXP_SGL alpha, const FIXP_DBL a,
+                                         const FIXP_DBL b) {
+  return (b - fMult(alpha, b) + fMult(alpha, a));
+}
+
+/**
+ * \brief Map MPEG Surround channel indices to MPEG 4 PCE like channel indices.
+ * \param self Spatial decoder handle.
+ * \param ch MPEG Surround channel index.
+ * \return MPEG 4 PCE style channel index, corresponding to the given MPEG
+ * Surround channel index.
+ */
+static UINT mapChannel(spatialDec *self, UINT ch) {
+  static const UCHAR chanelIdx[][8] = {
+      {0, 1, 2, 3, 4, 5, 6, 7}, /*  binaural, TREE_212, arbitrary tree */
+  };
+
+  int idx = 0;
+
+  return (chanelIdx[idx][ch]);
+}
+
+FIXP_DBL getChGain(spatialDec *self, UINT ch, INT *scale) {
+  /* init no gain modifier */
+  FIXP_DBL gain = 0x80000000;
+  *scale = 0;
+
+  if ((!isTwoChMode(self->upmixType)) &&
+      (self->upmixType != UPMIXTYPE_BYPASS)) {
+    if ((ch == 0) || (ch == 1) || (ch == 2)) {
+      /* no modifier */
+    }
+  }
+
+  return gain;
+}
+
+SACDEC_ERROR SpatialDecQMFAnalysis(spatialDec *self, const PCM_MPS *inData,
+                                   const INT ts, const INT bypassMode,
+                                   FIXP_DBL **qmfReal, FIXP_DBL **qmfImag,
+                                   const int numInputChannels) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch, offset;
+
+  offset = self->pQmfDomain->globalConf.nBandsSynthesis *
+           self->pQmfDomain->globalConf.nQmfTimeSlots;
+
+  {
+    for (ch = 0; ch < numInputChannels; ch++) {
+      const PCM_MPS *inSamples =
+          &inData[ts * self->pQmfDomain->globalConf.nBandsAnalysis];
+      FIXP_DBL *pQmfRealAnalysis = qmfReal[ch]; /* no delay in blind mode */
+      FIXP_DBL *pQmfImagAnalysis = qmfImag[ch];
+
+      CalculateSpaceAnalysisQmf(&self->pQmfDomain->QmfDomainIn[ch].fb,
+                                inSamples + (ch * offset), pQmfRealAnalysis,
+                                pQmfImagAnalysis);
+
+      if (!isTwoChMode(self->upmixType) && !bypassMode) {
+        int i;
+        for (i = 0; i < self->qmfBands; i++) {
+          qmfReal[ch][i] = fMult(qmfReal[ch][i], self->clipProtectGain__FDK);
+          qmfImag[ch][i] = fMult(qmfImag[ch][i], self->clipProtectGain__FDK);
+        }
+      }
+    }
+  }
+
+  self->qmfInputDelayBufPos =
+      (self->qmfInputDelayBufPos + 1) % self->pc_filterdelay;
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecFeedQMF(spatialDec *self, FIXP_DBL **qmfInDataReal,
+                               FIXP_DBL **qmfInDataImag, const INT ts,
+                               const INT bypassMode, FIXP_DBL **qmfReal__FDK,
+                               FIXP_DBL **qmfImag__FDK,
+                               const INT numInputChannels) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch;
+
+  {
+    for (ch = 0; ch < numInputChannels; ch++) {
+      FIXP_DBL *pQmfRealAnalysis =
+          qmfReal__FDK[ch]; /* no delay in blind mode */
+      FIXP_DBL *pQmfImagAnalysis = qmfImag__FDK[ch];
+
+      /* Write Input data to pQmfRealAnalysis. */
+      if (self->bShareDelayWithSBR) {
+        FDK_QmfDomain_GetSlot(
+            &self->pQmfDomain->QmfDomainIn[ch], ts + HYBRID_FILTER_DELAY, 0,
+            MAX_QMF_BANDS_TO_HYBRID, pQmfRealAnalysis, pQmfImagAnalysis, 15);
+        FDK_QmfDomain_GetSlot(&self->pQmfDomain->QmfDomainIn[ch], ts,
+                              MAX_QMF_BANDS_TO_HYBRID, self->qmfBands,
+                              pQmfRealAnalysis, pQmfImagAnalysis, 15);
+      } else {
+        FDK_QmfDomain_GetSlot(&self->pQmfDomain->QmfDomainIn[ch], ts, 0,
+                              self->qmfBands, pQmfRealAnalysis,
+                              pQmfImagAnalysis, 15);
+      }
+      if (ts == self->pQmfDomain->globalConf.nQmfTimeSlots - 1) {
+        /* Is currently also needed in case we dont have any overlap. We need to
+         * save lb_scale to ov_lb_scale */
+        FDK_QmfDomain_SaveOverlap(&self->pQmfDomain->QmfDomainIn[ch], 0);
+      }
+
+      /* Apply clip protection to output. */
+      if (!isTwoChMode(self->upmixType) && !bypassMode) {
+        int i;
+        for (i = 0; i < self->qmfBands; i++) {
+          qmfReal__FDK[ch][i] =
+              fMult(qmfReal__FDK[ch][i], self->clipProtectGain__FDK);
+          qmfImag__FDK[ch][i] =
+              fMult(qmfImag__FDK[ch][i], self->clipProtectGain__FDK);
+        }
+      }
+
+    } /* End of loop over numInputChannels */
+  }
+
+  self->qmfInputDelayBufPos =
+      (self->qmfInputDelayBufPos + 1) % self->pc_filterdelay;
+
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: SpatialDecHybridAnalysis
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+  float** pointers[4] leftReal, leftIm, rightReal, rightIm
+
+ Output:
+  float self->qmfInputReal[MAX_INPUT_CHANNELS][MAX_TIME_SLOTS][MAX_QMF_BANDS];
+  float self->qmfInputImag[MAX_INPUT_CHANNELS][MAX_TIME_SLOTS][MAX_QMF_BANDS];
+
+  float
+self->hybInputReal[MAX_INPUT_CHANNELS][MAX_TIME_SLOTS][MAX_HYBRID_BANDS]; float
+self->hybInputImag[MAX_INPUT_CHANNELS][MAX_TIME_SLOTS][MAX_HYBRID_BANDS];
+
+
+*******************************************************************************/
+SACDEC_ERROR SpatialDecHybridAnalysis(spatialDec *self, FIXP_DBL **qmfInputReal,
+                                      FIXP_DBL **qmfInputImag,
+                                      FIXP_DBL **hybOutputReal,
+                                      FIXP_DBL **hybOutputImag, const INT ts,
+                                      const INT numInputChannels) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch;
+
+  for (ch = 0; ch < numInputChannels;
+       ch++) /* hybrid filtering for down-mix signals */
+  {
+    if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD) {
+      int k;
+      /* No hybrid filtering. Just copy the QMF data. */
+      for (k = 0; k < self->hybridBands; k += 1) {
+        hybOutputReal[ch][k] = qmfInputReal[ch][k];
+        hybOutputImag[ch][k] = qmfInputImag[ch][k];
+      }
+    } else {
+      self->hybridAnalysis[ch].hfMode = self->bShareDelayWithSBR;
+
+      if (self->stereoConfigIndex == 3)
+        FDK_ASSERT(self->hybridAnalysis[ch].hfMode == 0);
+      FDKhybridAnalysisApply(&self->hybridAnalysis[ch], qmfInputReal[ch],
+                             qmfInputImag[ch], hybOutputReal[ch],
+                             hybOutputImag[ch]);
+    }
+  }
+
+  if ((self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_USAC) &&
+      self->residualCoding) {
+    self->hybridAnalysis[numInputChannels].hfMode = 0;
+    FDKhybridAnalysisApply(
+        &self->hybridAnalysis[numInputChannels],
+        self->qmfResidualReal__FDK[0][0], self->qmfResidualImag__FDK[0][0],
+        self->hybResidualReal__FDK[0], self->hybResidualImag__FDK[0]);
+  }
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecCreateX(spatialDec *self, FIXP_DBL **hybInputReal,
+                               FIXP_DBL **hybInputImag, FIXP_DBL **pxReal,
+                               FIXP_DBL **pxImag) {
+  SACDEC_ERROR err = MPS_OK;
+  int row;
+
+  /* Creating wDry */
+  for (row = 0; row < self->numInputChannels; row++) {
+    /* pointer to direct signals */
+    pxReal[row] = hybInputReal[row];
+    pxImag[row] = hybInputImag[row];
+  }
+
+  return err;
+}
+
+static void M2ParamToKernelMult(FIXP_SGL *RESTRICT pKernel,
+                                FIXP_DBL *RESTRICT Mparam,
+                                FIXP_DBL *RESTRICT MparamPrev,
+                                int *RESTRICT pWidth, FIXP_SGL alpha__FDK,
+                                int nBands) {
+  int pb;
+
+  for (pb = 0; pb < nBands; pb++) {
+    FIXP_SGL tmp = FX_DBL2FX_SGL(
+        interpolateParameter(alpha__FDK, Mparam[pb], MparamPrev[pb]));
+
+    int i = pWidth[pb];
+    if (i & 1) *pKernel++ = tmp;
+    if (i & 2) {
+      *pKernel++ = tmp;
+      *pKernel++ = tmp;
+    }
+    for (i >>= 2; i--;) {
+      *pKernel++ = tmp;
+      *pKernel++ = tmp;
+      *pKernel++ = tmp;
+      *pKernel++ = tmp;
+    }
+  }
+}
+
+SACDEC_ERROR SpatialDecApplyM1_CreateW_Mode212(
+    spatialDec *self, const SPATIAL_BS_FRAME *frame, FIXP_DBL **xReal,
+    FIXP_DBL **xImag, FIXP_DBL **vReal, FIXP_DBL **vImag) {
+  SACDEC_ERROR err = MPS_OK;
+  int res;
+  FIXP_DBL *decorrInReal = vReal[0];
+  FIXP_DBL *decorrInImag = vImag[0];
+
+  /* M1 does not do anything in 212 mode, so use simplified processing */
+  FDK_ASSERT(self->numVChannels == 2);
+  FDK_ASSERT(self->numDirektSignals == 1);
+  FDK_ASSERT(self->numDecorSignals == 1);
+  FDKmemcpy(vReal[0], xReal[0], self->hybridBands * sizeof(FIXP_DBL));
+  FDKmemcpy(vImag[0], xImag[0], self->hybridBands * sizeof(FIXP_DBL));
+
+  if (isTsdActive(frame->TsdData)) {
+    /* Generate v_{x,nonTr} as input for allpass based decorrelator */
+    TsdGenerateNonTr(self->hybridBands, frame->TsdData, self->TsdTs, vReal[0],
+                     vImag[0], vReal[1], vImag[1], &decorrInReal,
+                     &decorrInImag);
+  }
+  /* - Decorrelate */
+  res = SpatialDecGetResidualIndex(self, 1);
+  if (FDKdecorrelateApply(&self->apDecor[0], decorrInReal, decorrInImag,
+                          vReal[1], vImag[1],
+                          self->param2hyb[self->residualBands[res]])) {
+    return MPS_NOTOK;
+  }
+  if (isTsdActive(frame->TsdData)) {
+    /* Generate v_{x,Tr}, apply transient decorrelator and add to allpass based
+     * decorrelator output */
+    TsdApply(self->hybridBands, frame->TsdData, &self->TsdTs,
+             vReal[0], /* input: v_x */
+             vImag[0],
+             vReal[1], /* input: d_{x,nonTr}; output: d_{x,nonTr} + d_{x,Tr} */
+             vImag[1]);
+  }
+
+  /* Write residual signal in approriate parameter bands */
+  if (self->residualBands[res] > 0) {
+    int stopBand = self->param2hyb[self->residualBands[res]];
+    FDKmemcpy(vReal[1], self->hybResidualReal__FDK[res],
+              fixMin(stopBand, self->hybridBands) * sizeof(FIXP_DBL));
+    FDKmemcpy(vImag[1], self->hybResidualImag__FDK[res],
+              fixMin(stopBand, self->hybridBands) * sizeof(FIXP_DBL));
+  } /* (self->residualBands[res]>0) */
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecApplyM2_Mode212(spatialDec *self, INT ps,
+                                       const FIXP_SGL alpha, FIXP_DBL **wReal,
+                                       FIXP_DBL **wImag,
+                                       FIXP_DBL **hybOutputRealDry,
+                                       FIXP_DBL **hybOutputImagDry) {
+  SACDEC_ERROR err = MPS_OK;
+  INT row;
+
+  INT *pWidth = self->kernels_width;
+  /* for stereoConfigIndex == 3 case hybridBands is < 71 */
+  INT pb_max = self->kernels[self->hybridBands - 1] + 1;
+  INT max_row = self->numOutputChannels;
+
+  INT M2_exp = 0;
+  if (self->residualCoding) M2_exp = 3;
+
+  for (row = 0; row < max_row; row++)  // 2 times
+  {
+    FIXP_DBL *Mparam0 = self->M2Real__FDK[row][0];
+    FIXP_DBL *Mparam1 = self->M2Real__FDK[row][1];
+    FIXP_DBL *MparamPrev0 = self->M2RealPrev__FDK[row][0];
+    FIXP_DBL *MparamPrev1 = self->M2RealPrev__FDK[row][1];
+
+    FIXP_DBL *RESTRICT pHybOutRealDry = hybOutputRealDry[row];
+    FIXP_DBL *RESTRICT pHybOutImagDry = hybOutputImagDry[row];
+
+    FIXP_DBL *RESTRICT pWReal0 = wReal[0];
+    FIXP_DBL *RESTRICT pWReal1 = wReal[1];
+    FIXP_DBL *RESTRICT pWImag0 = wImag[0];
+    FIXP_DBL *RESTRICT pWImag1 = wImag[1];
+    for (INT pb = 0; pb < pb_max; pb++) {
+      FIXP_DBL tmp0, tmp1;
+
+      tmp0 = interpolateParameter(alpha, Mparam0[pb], MparamPrev0[pb]);
+      tmp1 = interpolateParameter(alpha, Mparam1[pb], MparamPrev1[pb]);
+
+      INT i = pWidth[pb];
+
+      do  // about 3-4 times
+      {
+        FIXP_DBL var0, var1, real, imag;
+
+        var0 = *pWReal0++;
+        var1 = *pWReal1++;
+        real = fMultDiv2(var0, tmp0);
+        var0 = *pWImag0++;
+        real = fMultAddDiv2(real, var1, tmp1);
+        var1 = *pWImag1++;
+        imag = fMultDiv2(var0, tmp0);
+        *pHybOutRealDry++ = real << (1 + M2_exp);
+        imag = fMultAddDiv2(imag, var1, tmp1);
+        *pHybOutImagDry++ = imag << (1 + M2_exp);
+      } while (--i != 0);
+    }
+  }
+  return err;
+}
+
+SACDEC_ERROR SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(
+    spatialDec *self, INT ps, const FIXP_SGL alpha, FIXP_DBL **wReal,
+    FIXP_DBL **wImag, FIXP_DBL **hybOutputRealDry,
+    FIXP_DBL **hybOutputImagDry) {
+  SACDEC_ERROR err = MPS_OK;
+  INT row;
+  INT scale_param_m2;
+  INT *pWidth = self->kernels_width;
+  INT pb_max = self->kernels[self->hybridBands - 1] + 1;
+
+  scale_param_m2 = SCALE_PARAM_M2_212_PRED + SCALE_DATA_APPLY_M2;
+
+  for (row = 0; row < self->numM2rows; row++) {
+    INT qs, pb;
+
+    FIXP_DBL *RESTRICT pWReal0 = wReal[0];
+    FIXP_DBL *RESTRICT pWImag0 = wImag[0];
+    FIXP_DBL *RESTRICT pWReal1 = wReal[1];
+    FIXP_DBL *RESTRICT pWImag1 = wImag[1];
+
+    FIXP_DBL *MReal0 = self->M2Real__FDK[row][0];
+    FIXP_DBL *MImag0 = self->M2Imag__FDK[row][0];
+    FIXP_DBL *MReal1 = self->M2Real__FDK[row][1];
+    FIXP_DBL *MRealPrev0 = self->M2RealPrev__FDK[row][0];
+    FIXP_DBL *MImagPrev0 = self->M2ImagPrev__FDK[row][0];
+    FIXP_DBL *MRealPrev1 = self->M2RealPrev__FDK[row][1];
+
+    FIXP_DBL *RESTRICT pHybOutRealDry = hybOutputRealDry[row];
+    FIXP_DBL *RESTRICT pHybOutImagDry = hybOutputImagDry[row];
+
+    FDK_ASSERT(!(self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD));
+    FDK_ASSERT((pWidth[0] + pWidth[1]) >= 3);
+
+    for (pb = 0, qs = 3; pb < 2; pb++) {
+      INT s;
+      FIXP_DBL maxVal;
+      FIXP_SGL mReal1;
+      FIXP_SGL mReal0, mImag0;
+      FIXP_DBL iReal0, iImag0, iReal1;
+
+      iReal0 = interpolateParameter(alpha, MReal0[pb], MRealPrev0[pb]);
+      iImag0 = -interpolateParameter(alpha, MImag0[pb], MImagPrev0[pb]);
+      iReal1 = interpolateParameter(alpha, MReal1[pb], MRealPrev1[pb]);
+
+      maxVal = fAbs(iReal0) | fAbs(iImag0);
+      maxVal |= fAbs(iReal1);
+
+      s = fMax(CntLeadingZeros(maxVal) - 1, 0);
+      s = fMin(s, scale_param_m2);
+
+      mReal0 = FX_DBL2FX_SGL(iReal0 << s);
+      mImag0 = FX_DBL2FX_SGL(iImag0 << s);
+      mReal1 = FX_DBL2FX_SGL(iReal1 << s);
+
+      s = scale_param_m2 - s;
+
+      INT i = pWidth[pb];
+
+      do {
+        FIXP_DBL real, imag, wReal0, wImag0, wReal1, wImag1;
+
+        wReal0 = *pWReal0++;
+        wImag0 = *pWImag0++;
+        wReal1 = *pWReal1++;
+        wImag1 = *pWImag1++;
+
+        cplxMultDiv2(&real, &imag, wReal0, wImag0, mReal0, mImag0);
+
+        *pHybOutRealDry++ = fMultAddDiv2(real, wReal1, mReal1) << s;
+        *pHybOutImagDry++ = fMultAddDiv2(imag, wImag1, mReal1) << s;
+
+        if (qs > 0) {
+          mImag0 = -mImag0;
+          qs--;
+        }
+      } while (--i != 0);
+    }
+
+    for (; pb < pb_max; pb++) {
+      INT s;
+      FIXP_DBL maxVal;
+      FIXP_SGL mReal1;
+      FIXP_SGL mReal0, mImag0;
+      FIXP_DBL iReal0, iImag0, iReal1;
+
+      iReal0 = interpolateParameter(alpha, MReal0[pb], MRealPrev0[pb]);
+      iImag0 = interpolateParameter(alpha, MImag0[pb], MImagPrev0[pb]);
+      iReal1 = interpolateParameter(alpha, MReal1[pb], MRealPrev1[pb]);
+
+      maxVal = fAbs(iReal0) | fAbs(iImag0);
+      maxVal |= fAbs(iReal1);
+
+      s = fMax(CntLeadingZeros(maxVal) - 1, 0);
+      s = fMin(s, scale_param_m2);
+
+      mReal0 = FX_DBL2FX_SGL(iReal0 << s);
+      mImag0 = FX_DBL2FX_SGL(iImag0 << s);
+      mReal1 = FX_DBL2FX_SGL(iReal1 << s);
+
+      s = scale_param_m2 - s;
+
+      INT i = pWidth[pb];
+
+      do {
+        FIXP_DBL real, imag, wReal0, wImag0, wReal1, wImag1;
+
+        wReal0 = *pWReal0++;
+        wImag0 = *pWImag0++;
+        wReal1 = *pWReal1++;
+        wImag1 = *pWImag1++;
+
+        cplxMultDiv2(&real, &imag, wReal0, wImag0, mReal0, mImag0);
+
+        *pHybOutRealDry++ = fMultAddDiv2(real, wReal1, mReal1) << s;
+        *pHybOutImagDry++ = fMultAddDiv2(imag, wImag1, mReal1) << s;
+      } while (--i != 0);
+    }
+  }
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecApplyM2(spatialDec *self, INT ps, const FIXP_SGL alpha,
+                               FIXP_DBL **wReal, FIXP_DBL **wImag,
+                               FIXP_DBL **hybOutputRealDry,
+                               FIXP_DBL **hybOutputImagDry,
+                               FIXP_DBL **hybOutputRealWet,
+                               FIXP_DBL **hybOutputImagWet) {
+  SACDEC_ERROR err = MPS_OK;
+
+  {
+    int qs, row, col;
+    int complexHybBands;
+    int complexParBands;
+    int scale_param_m2 = 0;
+    int toolsDisabled;
+
+    UCHAR activParamBands;
+    FIXP_DBL *RESTRICT pWReal, *RESTRICT pWImag, *RESTRICT pHybOutRealDry,
+        *RESTRICT pHybOutImagDry, *RESTRICT pHybOutRealWet,
+        *RESTRICT pHybOutImagWet;
+    C_ALLOC_SCRATCH_START(pKernel, FIXP_SGL, MAX_HYBRID_BANDS);
+
+    /* The wet signal is added to the dry signal directly in applyM2 if GES and
+     * STP are disabled */
+    toolsDisabled =
+        ((self->tempShapeConfig == 1) || (self->tempShapeConfig == 2)) ? 0 : 1;
+
+    {
+      complexHybBands = self->hybridBands;
+      complexParBands = self->numParameterBands;
+    }
+
+    FDKmemclear(hybOutputImagDry[0],
+                self->createParams.maxNumOutputChannels *
+                    self->createParams.maxNumCmplxHybBands * sizeof(FIXP_DBL));
+    FDKmemclear(hybOutputRealDry[0], self->createParams.maxNumOutputChannels *
+                                         self->createParams.maxNumHybridBands *
+                                         sizeof(FIXP_DBL));
+
+    if (!toolsDisabled) {
+      FDKmemclear(hybOutputRealWet[0],
+                  self->createParams.maxNumOutputChannels *
+                      self->createParams.maxNumHybridBands * sizeof(FIXP_DBL));
+      FDKmemclear(hybOutputImagWet[0],
+                  self->createParams.maxNumOutputChannels *
+                      self->createParams.maxNumCmplxHybBands *
+                      sizeof(FIXP_DBL));
+    }
+
+    if (self->phaseCoding == 3) {
+      /* + SCALE_DATA_APPLY_M2 to compensate for Div2 below ?! */
+      scale_param_m2 = SCALE_PARAM_M2_212_PRED + SCALE_DATA_APPLY_M2;
+    }
+
+    for (row = 0; row < self->numM2rows; row++) {
+      pHybOutRealDry = hybOutputRealDry[row];
+      pHybOutImagDry = hybOutputImagDry[row];
+
+      if (toolsDisabled) {
+        pHybOutRealWet = hybOutputRealDry[row];
+        pHybOutImagWet = hybOutputImagDry[row];
+      } else {
+        pHybOutRealWet = hybOutputRealWet[row];
+        pHybOutImagWet = hybOutputImagWet[row];
+      }
+
+      for (col = 0; col < self->numDirektSignals; col++) {
+        if (self->pActivM2ParamBands ==
+            0) { /* default setting, calculate all rows and columns */
+          activParamBands = 1;
+        } else {
+          if (self->pActivM2ParamBands[MAX_M2_INPUT * row +
+                                       col]) /* table with activ and inactiv
+                                                bands exists for current
+                                                configuration */
+            activParamBands = 1;
+          else
+            activParamBands = 0;
+        }
+        if (activParamBands) {
+          pWReal = wReal[col];
+          pWImag = wImag[col];
+
+          M2ParamToKernelMult(pKernel, self->M2Real__FDK[row][col],
+                              self->M2RealPrev__FDK[row][col],
+                              self->kernels_width, alpha,
+                              self->numParameterBands);
+
+          if (1 && (self->phaseCoding != 3)) {
+            /* direct signals */
+            {
+              /* only one sample will be assigned to each row, hence
+               * accumulation is not neccessary; that is valid for all
+               * configurations */
+              for (qs = 0; qs < complexHybBands; qs++) {
+                pHybOutRealDry[qs] = fMult(pWReal[qs], pKernel[qs]);
+                pHybOutImagDry[qs] = fMult(pWImag[qs], pKernel[qs]);
+              }
+            }
+          } else { /*  isBinauralMode(self->upmixType)  */
+
+            for (qs = 0; qs < complexHybBands; qs++) {
+              pHybOutRealDry[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagDry[qs] += fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+
+            M2ParamToKernelMult(pKernel, self->M2Imag__FDK[row][col],
+                                self->M2ImagPrev__FDK[row][col],
+                                self->kernels_width, alpha, complexParBands);
+
+            /* direct signals sign is -1 for qs = 0,2 */
+            pHybOutRealDry[0] += fMultDiv2(pWImag[0], pKernel[0])
+                                 << (scale_param_m2);
+            pHybOutImagDry[0] -= fMultDiv2(pWReal[0], pKernel[0])
+                                 << (scale_param_m2);
+
+            pHybOutRealDry[2] += fMultDiv2(pWImag[2], pKernel[2])
+                                 << (scale_param_m2);
+            pHybOutImagDry[2] -= fMultDiv2(pWReal[2], pKernel[2])
+                                 << (scale_param_m2);
+
+            /* direct signals sign is +1 for qs = 1,3,4,5,...,complexHybBands */
+            pHybOutRealDry[1] -= fMultDiv2(pWImag[1], pKernel[1])
+                                 << (scale_param_m2);
+            pHybOutImagDry[1] += fMultDiv2(pWReal[1], pKernel[1])
+                                 << (scale_param_m2);
+
+            for (qs = 3; qs < complexHybBands; qs++) {
+              pHybOutRealDry[qs] -= fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagDry[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+          } /* self->upmixType */
+        }   /* if (activParamBands) */
+      }     /* self->numDirektSignals */
+
+      for (; col < self->numVChannels; col++) {
+        if (self->pActivM2ParamBands ==
+            0) { /* default setting, calculate all rows and columns */
+          activParamBands = 1;
+        } else {
+          if (self->pActivM2ParamBands[MAX_M2_INPUT * row +
+                                       col]) /* table with activ and inactiv
+                                                bands exists for current
+                                                configuration */
+            activParamBands = 1;
+          else
+            activParamBands = 0;
+        }
+
+        if (activParamBands) {
+          int resBandIndex;
+          int resHybIndex;
+
+          resBandIndex =
+              self->residualBands[SpatialDecGetResidualIndex(self, col)];
+          resHybIndex = self->param2hyb[resBandIndex];
+
+          pWReal = wReal[col];
+          pWImag = wImag[col];
+
+          M2ParamToKernelMult(pKernel, self->M2Real__FDK[row][col],
+                              self->M2RealPrev__FDK[row][col],
+                              self->kernels_width, alpha,
+                              self->numParameterBands);
+
+          if (1 && (self->phaseCoding != 3)) {
+            /* residual signals */
+            for (qs = 0; qs < resHybIndex; qs++) {
+              pHybOutRealDry[qs] += fMult(pWReal[qs], pKernel[qs]);
+              pHybOutImagDry[qs] += fMult(pWImag[qs], pKernel[qs]);
+            }
+            /* decor signals */
+            for (; qs < complexHybBands; qs++) {
+              pHybOutRealWet[qs] += fMult(pWReal[qs], pKernel[qs]);
+              pHybOutImagWet[qs] += fMult(pWImag[qs], pKernel[qs]);
+            }
+          } else { /* self->upmixType */
+            /* residual signals */
+            FIXP_DBL *RESTRICT pHybOutReal;
+            FIXP_DBL *RESTRICT pHybOutImag;
+
+            for (qs = 0; qs < resHybIndex; qs++) {
+              pHybOutRealDry[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagDry[qs] += fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+            /* decor signals */
+            for (; qs < complexHybBands; qs++) {
+              pHybOutRealWet[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagWet[qs] += fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+
+            M2ParamToKernelMult(pKernel, self->M2Imag__FDK[row][col],
+                                self->M2ImagPrev__FDK[row][col],
+                                self->kernels_width, alpha, complexParBands);
+
+            /* direct signals sign is -1 for qs = 0,2 */
+            /* direct signals sign is +1 for qs = 1,3.. */
+            if (toolsDisabled) {
+              pHybOutRealDry[0] += fMultDiv2(pWImag[0], pKernel[0])
+                                   << (scale_param_m2);
+              pHybOutImagDry[0] -= fMultDiv2(pWReal[0], pKernel[0])
+                                   << (scale_param_m2);
+
+              pHybOutRealDry[1] -= fMultDiv2(pWImag[1], pKernel[1])
+                                   << (scale_param_m2);
+              pHybOutImagDry[1] += fMultDiv2(pWReal[1], pKernel[1])
+                                   << (scale_param_m2);
+
+              pHybOutRealDry[2] += fMultDiv2(pWImag[2], pKernel[2])
+                                   << (scale_param_m2);
+              pHybOutImagDry[2] -= fMultDiv2(pWReal[2], pKernel[2])
+                                   << (scale_param_m2);
+            } else {
+              pHybOutReal = &pHybOutRealDry[0];
+              pHybOutImag = &pHybOutImagDry[0];
+              if (0 == resHybIndex) {
+                pHybOutReal = &pHybOutRealWet[0];
+                pHybOutImag = &pHybOutImagWet[0];
+              }
+              pHybOutReal[0] += fMultDiv2(pWImag[0], pKernel[0])
+                                << (scale_param_m2);
+              pHybOutImag[0] -= fMultDiv2(pWReal[0], pKernel[0])
+                                << (scale_param_m2);
+
+              if (1 == resHybIndex) {
+                pHybOutReal = &pHybOutRealWet[0];
+                pHybOutImag = &pHybOutImagWet[0];
+              }
+              pHybOutReal[1] -= fMultDiv2(pWImag[1], pKernel[1])
+                                << (scale_param_m2);
+              pHybOutImag[1] += fMultDiv2(pWReal[1], pKernel[1])
+                                << (scale_param_m2);
+
+              if (2 == resHybIndex) {
+                pHybOutReal = &pHybOutRealWet[0];
+                pHybOutImag = &pHybOutImagWet[0];
+              }
+              pHybOutReal[2] += fMultDiv2(pWImag[2], pKernel[2])
+                                << (scale_param_m2);
+              pHybOutImag[2] -= fMultDiv2(pWReal[2], pKernel[2])
+                                << (scale_param_m2);
+            }
+
+            for (qs = 3; qs < resHybIndex; qs++) {
+              pHybOutRealDry[qs] -= fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagDry[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+            /* decor signals */
+            for (; qs < complexHybBands; qs++) {
+              pHybOutRealWet[qs] -= fMultDiv2(pWImag[qs], pKernel[qs])
+                                    << (scale_param_m2);
+              pHybOutImagWet[qs] += fMultDiv2(pWReal[qs], pKernel[qs])
+                                    << (scale_param_m2);
+            }
+          } /* self->upmixType */
+        }   /* if (activParamBands) { */
+      }     /*  self->numVChannels */
+    }
+
+    C_ALLOC_SCRATCH_END(pKernel, FIXP_SGL, MAX_HYBRID_BANDS);
+  }
+
+  return err;
+}
+
+SACDEC_ERROR SpatialDecSynthesis(spatialDec *self, const INT ts,
+                                 FIXP_DBL **hybOutputReal,
+                                 FIXP_DBL **hybOutputImag, PCM_MPS *timeOut,
+                                 const INT numInputChannels,
+                                 const FDK_channelMapDescr *const mapDescr) {
+  SACDEC_ERROR err = MPS_OK;
+
+  int ch;
+  int stride, offset;
+
+  stride = self->numOutputChannelsAT;
+  offset = 1;
+
+  PCM_MPS *pTimeOut__FDK =
+      &timeOut[stride * self->pQmfDomain->globalConf.nBandsSynthesis * ts];
+  C_ALLOC_SCRATCH_START(pQmfReal, FIXP_DBL, QMF_MAX_SYNTHESIS_BANDS);
+  C_ALLOC_SCRATCH_START(pQmfImag, FIXP_DBL, QMF_MAX_SYNTHESIS_BANDS);
+
+  for (ch = 0; ch < self->numOutputChannelsAT; ch++) {
+    if (self->pConfigCurrent->syntaxFlags & SACDEC_SYNTAX_LD) {
+      int k;
+      /* No hybrid filtering. Just copy the QMF data. */
+      for (k = 0; k < self->hybridBands; k += 1) {
+        pQmfReal[k] = hybOutputReal[ch][k];
+        pQmfImag[k] = hybOutputImag[ch][k];
+      }
+    } else {
+      FDKhybridSynthesisApply(&self->hybridSynthesis[ch], hybOutputReal[ch],
+                              hybOutputImag[ch], pQmfReal, pQmfImag);
+    }
+
+    /* Map channel indices from MPEG Surround -> PCE style -> channelMapping[]
+     */
+    FDK_ASSERT(self->numOutputChannelsAT <= 6);
+    int outCh = FDK_chMapDescr_getMapValue(mapDescr, mapChannel(self, ch),
+                                           self->numOutputChannelsAT);
+
+    {
+      if (self->stereoConfigIndex == 3) {
+        /* MPS -> SBR */
+        int i;
+        FIXP_DBL *pWorkBufReal, *pWorkBufImag;
+        FDK_ASSERT((self->pQmfDomain->QmfDomainOut[outCh].fb.outGain_m ==
+                    (FIXP_DBL)0x80000000) &&
+                   (self->pQmfDomain->QmfDomainOut[outCh].fb.outGain_e == 0));
+        FDK_QmfDomain_GetWorkBuffer(&self->pQmfDomain->QmfDomainIn[outCh], ts,
+                                    &pWorkBufReal, &pWorkBufImag);
+        FDK_ASSERT(self->qmfBands <=
+                   self->pQmfDomain->QmfDomainIn[outCh].workBuf_nBands);
+        for (i = 0; i < self->qmfBands; i++) {
+          pWorkBufReal[i] = pQmfReal[i];
+          pWorkBufImag[i] = pQmfImag[i];
+        }
+        self->pQmfDomain->QmfDomainIn[outCh].scaling.lb_scale =
+            -7; /*-ALGORITHMIC_SCALING_IN_ANALYSIS_FILTERBANK;*/
+        self->pQmfDomain->QmfDomainIn[outCh].scaling.lb_scale -=
+            self->pQmfDomain->QmfDomainIn[outCh].fb.filterScale;
+        self->pQmfDomain->QmfDomainIn[outCh].scaling.lb_scale -=
+            self->clipProtectGainSF__FDK;
+
+      } else {
+        /* Call the QMF synthesis for dry. */
+        err = CalculateSpaceSynthesisQmf(&self->pQmfDomain->QmfDomainOut[outCh],
+                                         pQmfReal, pQmfImag, stride,
+                                         pTimeOut__FDK + (offset * outCh));
+      }
+      if (err != MPS_OK) goto bail;
+    }
+  } /* ch loop */
+
+bail:
+  C_ALLOC_SCRATCH_END(pQmfImag, FIXP_DBL, QMF_MAX_SYNTHESIS_BANDS);
+  C_ALLOC_SCRATCH_END(pQmfReal, FIXP_DBL, QMF_MAX_SYNTHESIS_BANDS);
+
+  return err;
+}
+
+void SpatialDecBufferMatrices(spatialDec *self) {
+  int row, col;
+  int complexParBands;
+  complexParBands = self->numParameterBands;
+
+  /*
+    buffer matrices M2
+  */
+  for (row = 0; row < self->numM2rows; row++) {
+    for (col = 0; col < self->numVChannels; col++) {
+      FDKmemcpy(self->M2RealPrev__FDK[row][col], self->M2Real__FDK[row][col],
+                self->numParameterBands * sizeof(FIXP_DBL));
+      if (0 || (self->phaseCoding == 3)) {
+        FDKmemcpy(self->M2ImagPrev__FDK[row][col], self->M2Imag__FDK[row][col],
+                  complexParBands * sizeof(FIXP_DBL));
+      }
+    }
+  }
+
+  /* buffer phase */
+  FDKmemcpy(self->PhasePrevLeft__FDK, self->PhaseLeft__FDK,
+            self->numParameterBands * sizeof(FIXP_DBL));
+  FDKmemcpy(self->PhasePrevRight__FDK, self->PhaseRight__FDK,
+            self->numParameterBands * sizeof(FIXP_DBL));
+}
+
+#define PHASE_SCALE 2
+
+#ifndef P_PI
+#define P_PI 3.1415926535897932
+#endif
+
+/* For better precision, PI (pi_x2) is already doubled */
+static FIXP_DBL interp_angle__FDK(FIXP_DBL angle1, FIXP_DBL angle2,
+                                  FIXP_SGL alpha, FIXP_DBL pi_x2) {
+  if (angle2 - angle1 > (pi_x2 >> 1)) angle2 -= pi_x2;
+
+  if (angle1 - angle2 > (pi_x2 >> 1)) angle1 -= pi_x2;
+
+  return interpolateParameter(alpha, angle2, angle1);
+}
+
+/*
+ *
+ */
+void SpatialDecApplyPhase(spatialDec *self, FIXP_SGL alpha__FDK,
+                          int lastSlotOfParamSet) {
+  int pb, qs;
+  FIXP_DBL ppb[MAX_PARAMETER_BANDS *
+               4]; /* left real, imag - right real, imag interleaved */
+
+  const FIXP_DBL pi_x2 = PIx2__IPD;
+  for (pb = 0; pb < self->numParameterBands; pb++) {
+    FIXP_DBL pl, pr;
+
+    pl = interp_angle__FDK(self->PhasePrevLeft__FDK[pb],
+                           self->PhaseLeft__FDK[pb], alpha__FDK, pi_x2);
+    pr = interp_angle__FDK(self->PhasePrevRight__FDK[pb],
+                           self->PhaseRight__FDK[pb], alpha__FDK, pi_x2);
+
+    inline_fixp_cos_sin(pl, pr, IPD_SCALE, &ppb[4 * pb]);
+  }
+
+  /* sign is -1 for qs = 0,2 and +1 for qs = 1 */
+
+  const SCHAR *kernels = &self->kernels[0];
+
+  FIXP_DBL *Dry_real0 = &self->hybOutputRealDry__FDK[0][0];
+  FIXP_DBL *Dry_imag0 = &self->hybOutputImagDry__FDK[0][0];
+  FIXP_DBL *Dry_real1 = &self->hybOutputRealDry__FDK[1][0];
+  FIXP_DBL *Dry_imag1 = &self->hybOutputImagDry__FDK[1][0];
+
+  for (qs = 2; qs >= 0; qs--) {
+    FIXP_DBL out_re, out_im;
+
+    pb = *kernels++;
+    if (qs == 1) /* sign[qs] >= 0 */
+    {
+      cplxMultDiv2(&out_re, &out_im, *Dry_real0, *Dry_imag0, ppb[4 * pb + 0],
+                   ppb[4 * pb + 1]);
+      out_re <<= PHASE_SCALE - 1;
+      out_im <<= PHASE_SCALE - 1;
+      *Dry_real0++ = out_re;
+      *Dry_imag0++ = out_im;
+
+      cplxMultDiv2(&out_re, &out_im, *Dry_real1, *Dry_imag1, ppb[4 * pb + 2],
+                   ppb[4 * pb + 3]);
+      out_re <<= PHASE_SCALE - 1;
+      out_im <<= PHASE_SCALE - 1;
+      *Dry_real1++ = out_re;
+      *Dry_imag1++ = out_im;
+    } else {
+      cplxMultDiv2(&out_re, &out_im, *Dry_real0, *Dry_imag0, ppb[4 * pb + 0],
+                   -ppb[4 * pb + 1]);
+      out_re <<= PHASE_SCALE - 1;
+      out_im <<= PHASE_SCALE - 1;
+      *Dry_real0++ = out_re;
+      *Dry_imag0++ = out_im;
+
+      cplxMultDiv2(&out_re, &out_im, *Dry_real1, *Dry_imag1, ppb[4 * pb + 2],
+                   -ppb[4 * pb + 3]);
+      out_re <<= PHASE_SCALE - 1;
+      out_im <<= PHASE_SCALE - 1;
+      *Dry_real1++ = out_re;
+      *Dry_imag1++ = out_im;
+    }
+  }
+
+  /* sign is +1 for qs >=3 */
+  for (qs = self->hybridBands - 3; qs--;) {
+    FIXP_DBL out_re, out_im;
+
+    pb = *kernels++;
+    cplxMultDiv2(&out_re, &out_im, *Dry_real0, *Dry_imag0, ppb[4 * pb + 0],
+                 ppb[4 * pb + 1]);
+    out_re <<= PHASE_SCALE - 1;
+    out_im <<= PHASE_SCALE - 1;
+    *Dry_real0++ = out_re;
+    *Dry_imag0++ = out_im;
+
+    cplxMultDiv2(&out_re, &out_im, *Dry_real1, *Dry_imag1, ppb[4 * pb + 2],
+                 ppb[4 * pb + 3]);
+    out_re <<= PHASE_SCALE - 1;
+    out_im <<= PHASE_SCALE - 1;
+    *Dry_real1++ = out_re;
+    *Dry_imag1++ = out_im;
+  }
+}
diff --git a/fdk-aac/libSACdec/src/sac_process.h b/fdk-aac/libSACdec/src/sac_process.h
new file mode 100644
index 0000000..ee2f2fe
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_process.h
@@ -0,0 +1,297 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Processing
+
+*******************************************************************************/
+
+/*!
+  \file
+  \brief  Polyphase Filterbank
+*/
+
+#ifndef SAC_PROCESS_H
+#define SAC_PROCESS_H
+
+#include "sac_dec.h"
+
+void SpatialDecApplyPhase(spatialDec *self, FIXP_SGL alpha,
+                          int lastSlotOfParamSet);
+
+/**
+ * \brief  Apply QMF Analysis Filterbank.
+ *
+ * Calculates qmf data on downmix input time data.
+ * Delaylines will be applied if necessaray.
+ *
+ * \param self                A spatial decoder handle.
+ * \param inData              Downmix channel time data as input.
+ * \param ts                  Signals time slot offset for input buffer.
+ * \param qmfReal             Downmix channel qmf output data.
+ * \param qmfImag             Downmix channel qmf output data.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecQMFAnalysis(spatialDec *self, const PCM_MPS *inData,
+                                   const INT ts, const INT bypassMode,
+                                   FIXP_DBL **qmfReal, FIXP_DBL **qmfImag,
+                                   const int numInputChannels);
+
+/**
+ * \brief  Feed spatial decoder with external qmf data.
+ *
+ * \param self                A spatial decoder handle.
+ * \param qmfInDataReal       External qmf downmix data as input.
+ * \param qmfInDataImag       External qmf downmix data as input.
+ * \param ts                  Signals time slot in input buffer to process.
+ * \param qmfReal             Downmix channel qmf output data.
+ * \param qmfImag             Downmix channel qmf output data.
+ * \param numInputChannels    Number of input channels. Might differ from
+ * self->numInputChannels.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecFeedQMF(spatialDec *self, FIXP_DBL **qmfInDataReal,
+                               FIXP_DBL **qmfInDataImag, const INT ts,
+                               const INT bypassMode, FIXP_DBL **qmfReal,
+                               FIXP_DBL **qmfImag, const INT numInputChannels);
+
+/**
+ * \brief  Apply Hybrdid Analysis Filterbank.
+ *
+ * Calculates hybrid data on downmix input data.
+ * Residual hybrid signals will also be calculated on current slot if available.
+ *
+ * \param self                A spatial decoder handle.
+ * \param qmfInputReal        Downmix channel qmf data as input.
+ * \param qmfInputImag        Downmix channel qmf data as input.
+ * \param hybOutputReal       Downmix channel hybrid output data.
+ * \param hybOutputImag       Downmix channel hybrid output data.
+ * \param ts                  Signals time slot in spatial frame to process.
+ * \param numInputChannels    Number of input channels. Might differ from
+ * self->numInputChannels.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecHybridAnalysis(spatialDec *self, FIXP_DBL **qmfInputReal,
+                                      FIXP_DBL **qmfInputImag,
+                                      FIXP_DBL **hybOutputReal,
+                                      FIXP_DBL **hybOutputImag, const INT ts,
+                                      const INT numInputChannels);
+
+/**
+ * \brief  Create X data.
+ *
+ * Returns a pointer list over Xchannels pointing to downmix input channels
+ * and to residual channels when provided.
+ *
+ * \param self                A spatial decoder handle.
+ * \param hybInputReal        Downmix channel hybrid data as input.
+ * \param hybInputImag        Downmix channel hybrid data as input.
+ * \param pxReal              Pointer to hybrid and residual data as output.
+ * \param pxImag              Pointer to hybrid and residual data as output.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecCreateX(spatialDec *self, FIXP_DBL **hybInputReal,
+                               FIXP_DBL **hybInputImag, FIXP_DBL **pxReal,
+                               FIXP_DBL **pxImag);
+
+/**
+ * \brief  MPS212 combined version of apply M1 parameters and create wet signal
+ *
+ * \param self                A spatial decoder handle.
+ * \param xReal               Downmix and residual X data as input.
+ * \param xImag               Downmix and residual X data as input.
+ * \param vReal               output data: [0] direct signal (V); [1] wet signal
+ * (W).
+ * \param vImag               output data: [0] direct signal (V); [1] wet signal
+ * (W).
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecApplyM1_CreateW_Mode212(
+    spatialDec *self, const SPATIAL_BS_FRAME *frame, FIXP_DBL **xReal,
+    FIXP_DBL **xImag, FIXP_DBL **vReal, FIXP_DBL **vImag);
+
+/**
+ * \brief  Apply M2 parameters.
+ *
+ * \param self                A spatial decoder handle.
+ * \param ps                  Signals parameter band from where M2 parameter to
+ * use.
+ * \param alpha               Smoothing factor between current and previous
+ * parameter band. Rangeability between 0.f and 1.f.
+ * \param wReal               Wet input data.
+ * \param wImag               Wet input data.
+ * \param hybOutputRealDry    Dry output data.
+ * \param hybOutputImagDry    Dry output data.
+ * \param hybOutputRealWet    Wet output data.
+ * \param hybOutputImagWet    Wet output data.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecApplyM2(spatialDec *self, INT ps, const FIXP_SGL alpha,
+                               FIXP_DBL **wReal, FIXP_DBL **wImag,
+                               FIXP_DBL **hybOutputRealDry,
+                               FIXP_DBL **hybOutputImagDry,
+                               FIXP_DBL **hybOutputRealWet,
+                               FIXP_DBL **hybOutputImagWet);
+
+/**
+ * \brief  Apply M2 parameter for 212 mode with residualCoding and phaseCoding.
+ *
+ * \param self                [i] A spatial decoder handle.
+ * \param ps                  [i] Signals parameter band from where M2 parameter
+ * to use.
+ * \param alpha               [i] Smoothing factor between current and previous
+ * parameter band. Rangeability between 0.f and 1.f.
+ * \param wReal               [i] Wet input data.
+ * \param wImag               [i] Wet input data.
+ * \param hybOutputRealDry    [o] Dry output data.
+ * \param hybOutputImagDry    [o] Dry output data.
+ *
+ * \return error
+ */
+SACDEC_ERROR SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding(
+    spatialDec *self, INT ps, const FIXP_SGL alpha, FIXP_DBL **wReal,
+    FIXP_DBL **wImag, FIXP_DBL **hybOutputRealDry, FIXP_DBL **hybOutputImagDry);
+
+/**
+ * \brief  Apply M2 parameter for 212 mode, upmix from mono to stereo.
+ *
+ * \param self                [i] A spatial decoder handle.
+ * \param ps                  [i] Signals parameter band from where M2 parameter
+ * to use.
+ * \param alpha               [i] Smoothing factor between current and previous
+ * parameter band. Rangeability between 0.f and 1.f.
+ * \param wReal               [i] Wet input data.
+ * \param wImag               [i] Wet input data.
+ * \param hybOutputRealDry    [o] Dry output data.
+ * \param hybOutputImagDry    [o] Dry output data.
+ *
+ * \return error
+ */
+SACDEC_ERROR SpatialDecApplyM2_Mode212(spatialDec *self, INT ps,
+                                       const FIXP_SGL alpha, FIXP_DBL **wReal,
+                                       FIXP_DBL **wImag,
+                                       FIXP_DBL **hybOutputRealDry,
+                                       FIXP_DBL **hybOutputImagDry);
+
+/**
+ * \brief  Convert Hybrid input to output audio data.
+ *
+ * \param hSpaceSynthesisQmf  A spatial decoder handle.
+ * \param ts                  Signals time slot in spatial frame to process.
+ * \param hybOutputReal       Hybrid data as input.
+ * \param hybOutputImag       Hybrid data as input.
+ * \param timeOut             audio output data.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR SpatialDecSynthesis(spatialDec *self, const INT ts,
+                                 FIXP_DBL **hybOutputReal,
+                                 FIXP_DBL **hybOutputImag, PCM_MPS *timeOut,
+                                 const INT numInputChannels,
+                                 const FDK_channelMapDescr *const mapDescr);
+
+void SpatialDecBufferMatrices(spatialDec *self);
+
+FIXP_DBL getChGain(spatialDec *self, UINT ch, INT *scale);
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_qmf.cpp b/fdk-aac/libSACdec/src/sac_qmf.cpp
new file mode 100644
index 0000000..a075490
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_qmf.cpp
@@ -0,0 +1,156 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec QMF processing
+
+*******************************************************************************/
+
+#include "sac_qmf.h"
+
+#include "FDK_matrixCalloc.h"
+#include "sac_dec_interface.h"
+#include "sac_rom.h"
+
+#include "qmf.h"
+
+SACDEC_ERROR CalculateSpaceSynthesisQmf(
+    const HANDLE_FDK_QMF_DOMAIN_OUT hQmfDomainOutCh, const FIXP_DBL *Sr,
+    const FIXP_DBL *Si, const INT stride, INT_PCM *timeSig) {
+  SACDEC_ERROR err = MPS_OK;
+
+  if (hQmfDomainOutCh == NULL) {
+    err = MPS_INVALID_HANDLE;
+  } else {
+    HANDLE_SPACE_SYNTHESIS_QMF hSpaceSynthesisQmf = &hQmfDomainOutCh->fb;
+#if (QMF_MAX_SYNTHESIS_BANDS <= 64)
+    C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_DBL,
+                           (QMF_MAX_SYNTHESIS_BANDS << 1));
+#else
+    C_AALLOC_STACK_START(pWorkBuffer, FIXP_DBL, (QMF_MAX_SYNTHESIS_BANDS << 1));
+#endif
+
+    qmfSynthesisFilteringSlot(hSpaceSynthesisQmf, Sr, Si, 0, 0, timeSig, stride,
+                              pWorkBuffer);
+
+#if (QMF_MAX_SYNTHESIS_BANDS <= 64)
+    C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_DBL, (QMF_MAX_SYNTHESIS_BANDS << 1));
+#else
+    C_AALLOC_STACK_END(pWorkBuffer, FIXP_DBL, (QMF_MAX_SYNTHESIS_BANDS << 1));
+#endif
+  }
+
+  return err;
+}
+
+SACDEC_ERROR CalculateSpaceAnalysisQmf(
+    HANDLE_SPACE_ANALYSIS_QMF hSpaceAnalysisQmf, const PCM_MPS *timeSig,
+    FIXP_DBL *Sr, FIXP_DBL *Si) {
+  SACDEC_ERROR err = MPS_OK;
+
+  if (hSpaceAnalysisQmf == NULL) {
+    err = MPS_INVALID_HANDLE;
+  } else {
+    C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_DBL, (64 << 1));
+
+    qmfAnalysisFilteringSlot(hSpaceAnalysisQmf, Sr, Si, timeSig, 1,
+                             pWorkBuffer);
+    C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_DBL, (64 << 1));
+  }
+
+  return err;
+}
diff --git a/fdk-aac/libSACdec/src/sac_qmf.h b/fdk-aac/libSACdec/src/sac_qmf.h
new file mode 100644
index 0000000..d1dc837
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_qmf.h
@@ -0,0 +1,143 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec QMF processing
+
+*******************************************************************************/
+
+#ifndef SAC_QMF_H
+#define SAC_QMF_H
+
+#include "common_fix.h"
+
+#include "sac_dec_interface.h"
+
+#include "FDK_qmf_domain.h"
+#define HANDLE_SPACE_ANALYSIS_QMF HANDLE_QMF_FILTER_BANK
+#define HANDLE_SPACE_SYNTHESIS_QMF HANDLE_QMF_FILTER_BANK
+
+/**
+ * \brief  Convert Qmf input to output audio data.
+ *
+ * \param hSpaceSynthesisQmf  A Qmf Synthesis Filterbank handle.
+ * \param Sr                  Pointer to Qmf input buffer.
+ * \param Si                  Pointer to Qmf input buffer.
+ * \param stride              Stride factor for output data, 1 if none.
+ * \param timeSig             (None-)Interleaved audio output data.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR CalculateSpaceSynthesisQmf(
+    const HANDLE_FDK_QMF_DOMAIN_OUT hQmfDomainOutCh, const FIXP_DBL *Sr,
+    const FIXP_DBL *Si, const INT stride, INT_PCM *timeSig);
+
+/**
+ * \brief  Convert audio input data to qmf representation.
+ *
+ * \param hSpaceAnalysisQmf   A Qmf Analysis Filterbank handle.
+ * \param timeSig             (None-)Interleavd audio input data.
+ * \param Sr                  Pointer to Qmf output buffer.
+ * \param Si                  Pointer to Qmf output buffer.
+ *
+ * \return  Error status.
+ */
+SACDEC_ERROR CalculateSpaceAnalysisQmf(
+    HANDLE_SPACE_ANALYSIS_QMF hSpaceAnalysisQmf, const PCM_MPS *timeSig,
+    FIXP_DBL *Sr, FIXP_DBL *Si);
+
+#endif /* SAC_QMF_H */
diff --git a/fdk-aac/libSACdec/src/sac_reshapeBBEnv.cpp b/fdk-aac/libSACdec/src/sac_reshapeBBEnv.cpp
new file mode 100644
index 0000000..87c0ac6
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_reshapeBBEnv.cpp
@@ -0,0 +1,680 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec guided envelope shaping
+
+*******************************************************************************/
+
+#include "sac_reshapeBBEnv.h"
+
+#include "sac_dec.h"
+#include "sac_bitdec.h"
+#include "sac_calcM1andM2.h"
+#include "sac_reshapeBBEnv.h"
+#include "sac_rom.h"
+
+#define INP_DRY_WET 0
+#define INP_DMX 1
+
+#define SF_SHAPE 1
+#define SF_DIV32 6
+#define SF_FACTOR_SLOT 5
+
+#define START_BB_ENV 0 /* 10 */
+#define END_BB_ENV 9   /* 18 */
+
+#define SF_ALPHA1 8
+#define SF_BETA1 4
+
+void initBBEnv(spatialDec *self, int initStatesFlag) {
+  INT ch, k;
+
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    k = row2channelGES[self->treeConfig][ch];
+    self->row2channelDmxGES[ch] = k;
+    if (k == -1) continue;
+
+    switch (self->treeConfig) {
+      case TREE_212:
+        self->row2channelDmxGES[ch] = 0;
+        break;
+      default:;
+    }
+  }
+
+  if (initStatesFlag) {
+    for (k = 0; k < 2 * MAX_OUTPUT_CHANNELS + MAX_INPUT_CHANNELS; k++) {
+      self->reshapeBBEnvState->normNrgPrev__FDK[k] =
+          FL2FXCONST_DBL(0.5f); /* 32768.f*32768.f */
+      self->reshapeBBEnvState->normNrgPrevSF[k] = DFRACT_BITS - 1;
+      self->reshapeBBEnvState->partNrgPrevSF[k] = 0;
+      self->reshapeBBEnvState->partNrgPrev2SF[k] = 0;
+      self->reshapeBBEnvState->frameNrgPrevSF[k] = 0;
+    }
+  }
+
+  self->reshapeBBEnvState->alpha__FDK =
+      FL2FXCONST_DBL(0.99637845575f); /* FDKexp(-64 / (0.4f  * 44100)) */
+  self->reshapeBBEnvState->beta__FDK =
+      FL2FXCONST_DBL(0.96436909488f); /* FDKexp(-64 / (0.04f * 44100)) */
+}
+
+static inline void getSlotNrgHQ(FIXP_DBL *RESTRICT pReal,
+                                FIXP_DBL *RESTRICT pImag,
+                                FIXP_DBL *RESTRICT slotNrg, INT maxValSF,
+                                INT hybBands) {
+  INT qs;
+  FIXP_DBL nrg;
+
+  /* qs = 12, 13, 14 */
+  slotNrg[0] = ((fPow2Div2((*pReal++) << maxValSF) +
+                 fPow2Div2((*pImag++) << maxValSF)) >>
+                (SF_FACTOR_SLOT - 1));
+  slotNrg[1] = ((fPow2Div2((*pReal++) << maxValSF) +
+                 fPow2Div2((*pImag++) << maxValSF)) >>
+                (SF_FACTOR_SLOT - 1));
+  slotNrg[2] = ((fPow2Div2((*pReal++) << maxValSF) +
+                 fPow2Div2((*pImag++) << maxValSF)) >>
+                (SF_FACTOR_SLOT - 1));
+  /* qs = 15 */
+  slotNrg[3] = ((fPow2Div2((*pReal++) << maxValSF) +
+                 fPow2Div2((*pImag++) << maxValSF)) >>
+                (SF_FACTOR_SLOT - 1));
+  /* qs = 16, 17 */
+  nrg = ((fPow2Div2((*pReal++) << maxValSF) +
+          fPow2Div2((*pImag++) << maxValSF)) >>
+         (SF_FACTOR_SLOT - 1));
+  slotNrg[4] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
+                       fPow2Div2((*pImag++) << maxValSF)) >>
+                      (SF_FACTOR_SLOT - 1));
+  /* qs = 18, 19, 20 */
+  nrg = ((fPow2Div2((*pReal++) << maxValSF) +
+          fPow2Div2((*pImag++) << maxValSF)) >>
+         (SF_FACTOR_SLOT - 1));
+  nrg += ((fPow2Div2((*pReal++) << maxValSF) +
+           fPow2Div2((*pImag++) << maxValSF)) >>
+          (SF_FACTOR_SLOT - 1));
+  slotNrg[5] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
+                       fPow2Div2((*pImag++) << maxValSF)) >>
+                      (SF_FACTOR_SLOT - 1));
+  /* qs = 21, 22 */
+  nrg = ((fPow2Div2((*pReal++) << maxValSF) +
+          fPow2Div2((*pImag++) << maxValSF)) >>
+         (SF_FACTOR_SLOT - 1));
+  slotNrg[6] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
+                       fPow2Div2((*pImag++) << maxValSF)) >>
+                      (SF_FACTOR_SLOT - 1));
+  /* qs = 23, 24 */
+  if (hybBands > 23) {
+    slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) +
+                    fPow2Div2((*pImag++) << maxValSF)) >>
+                   (SF_FACTOR_SLOT - 1));
+    slotNrg[6] += ((fPow2Div2((*pReal++) << maxValSF) +
+                    fPow2Div2((*pImag++) << maxValSF)) >>
+                   (SF_FACTOR_SLOT - 1));
+    /* qs = 25, 26, 29, 28, 29 */
+    nrg = ((fPow2Div2((*pReal++) << maxValSF) +
+            fPow2Div2((*pImag++) << maxValSF)) >>
+           (SF_FACTOR_SLOT - 1));
+    nrg += ((fPow2Div2((*pReal++) << maxValSF) +
+             fPow2Div2((*pImag++) << maxValSF)) >>
+            (SF_FACTOR_SLOT - 1));
+    nrg += ((fPow2Div2((*pReal++) << maxValSF) +
+             fPow2Div2((*pImag++) << maxValSF)) >>
+            (SF_FACTOR_SLOT - 1));
+    nrg += ((fPow2Div2((*pReal++) << maxValSF) +
+             fPow2Div2((*pImag++) << maxValSF)) >>
+            (SF_FACTOR_SLOT - 1));
+    slotNrg[7] = nrg + ((fPow2Div2((*pReal++) << maxValSF) +
+                         fPow2Div2((*pImag++) << maxValSF)) >>
+                        (SF_FACTOR_SLOT - 1));
+    /* qs = 30 ... min(41,hybBands-1) */
+    nrg = ((fPow2Div2((*pReal++) << maxValSF) +
+            fPow2Div2((*pImag++) << maxValSF)) >>
+           (SF_FACTOR_SLOT - 1));
+    for (qs = 31; qs < hybBands; qs++) {
+      nrg += ((fPow2Div2((*pReal++) << maxValSF) +
+               fPow2Div2((*pImag++) << maxValSF)) >>
+              (SF_FACTOR_SLOT - 1));
+    }
+    slotNrg[8] = nrg;
+  } else {
+    slotNrg[7] = (FIXP_DBL)0;
+    slotNrg[8] = (FIXP_DBL)0;
+  }
+}
+
+static inline INT getMaxValDmx(FIXP_DBL *RESTRICT pReal,
+                               FIXP_DBL *RESTRICT pImag, INT cplxBands,
+                               INT hybBands) {
+  INT qs, clz;
+  FIXP_DBL maxVal = FL2FXCONST_DBL(0.0f);
+
+  for (qs = 12; qs < cplxBands; qs++) {
+    maxVal |= fAbs(pReal[qs]);
+    maxVal |= fAbs(pImag[qs]);
+  }
+  for (; qs < hybBands; qs++) {
+    maxVal |= fAbs(pReal[qs]);
+  }
+
+  clz = fixMax(0, CntLeadingZeros(maxVal) - 1);
+
+  return (clz);
+}
+
+static inline INT getMaxValDryWet(FIXP_DBL *RESTRICT pReal,
+                                  FIXP_DBL *RESTRICT pImag,
+                                  FIXP_DBL *RESTRICT pHybOutputRealDry,
+                                  FIXP_DBL *RESTRICT pHybOutputImagDry,
+                                  FIXP_DBL *RESTRICT pHybOutputRealWet,
+                                  FIXP_DBL *RESTRICT pHybOutputImagWet,
+                                  INT cplxBands, INT hybBands) {
+  INT qs, clz;
+  FIXP_DBL maxVal = FL2FXCONST_DBL(0.0f);
+
+  for (qs = 12; qs < cplxBands; qs++) {
+    pReal[qs] = pHybOutputRealDry[qs] + pHybOutputRealWet[qs];
+    maxVal |= fAbs(pReal[qs]);
+    pImag[qs] = pHybOutputImagDry[qs] + pHybOutputImagWet[qs];
+    maxVal |= fAbs(pImag[qs]);
+  }
+  for (; qs < hybBands; qs++) {
+    pReal[qs] = pHybOutputRealDry[qs] + pHybOutputRealWet[qs];
+    maxVal |= fAbs(pReal[qs]);
+  }
+
+  clz = fixMax(0, CntLeadingZeros(maxVal) - 1);
+
+  return (clz);
+}
+
+static inline void slotAmp(FIXP_DBL *RESTRICT slotAmp_dry,
+                           FIXP_DBL *RESTRICT slotAmp_wet,
+                           FIXP_DBL *RESTRICT pHybOutputRealDry,
+                           FIXP_DBL *RESTRICT pHybOutputImagDry,
+                           FIXP_DBL *RESTRICT pHybOutputRealWet,
+                           FIXP_DBL *RESTRICT pHybOutputImagWet, INT cplxBands,
+                           INT hybBands) {
+  INT qs;
+  FIXP_DBL dry, wet;
+
+  dry = wet = FL2FXCONST_DBL(0.0f);
+  for (qs = 0; qs < cplxBands; qs++) {
+    dry = fAddSaturate(dry, fPow2Div2(pHybOutputRealDry[qs]) +
+                                fPow2Div2(pHybOutputImagDry[qs]));
+    wet = fAddSaturate(wet, fPow2Div2(pHybOutputRealWet[qs]) +
+                                fPow2Div2(pHybOutputImagWet[qs]));
+  }
+  for (; qs < hybBands; qs++) {
+    dry = fAddSaturate(dry, fPow2Div2(pHybOutputRealDry[qs]));
+    wet = fAddSaturate(wet, fPow2Div2(pHybOutputRealWet[qs]));
+  }
+  *slotAmp_dry = dry;
+  *slotAmp_wet = wet;
+}
+
+#if defined(__aarch64__)
+__attribute__((noinline))
+#endif
+static void
+shapeBBEnv(FIXP_DBL *pHybOutputRealDry, FIXP_DBL *pHybOutputImagDry,
+           FIXP_DBL dryFac, INT scale, INT cplxBands, INT hybBands) {
+  INT qs;
+
+  if (scale == 0) {
+    for (qs = 0; qs < cplxBands; qs++) {
+      pHybOutputRealDry[qs] = fMultDiv2(pHybOutputRealDry[qs], dryFac);
+      pHybOutputImagDry[qs] = fMultDiv2(pHybOutputImagDry[qs], dryFac);
+    }
+    for (; qs < hybBands; qs++) {
+      pHybOutputRealDry[qs] = fMultDiv2(pHybOutputRealDry[qs], dryFac);
+    }
+  } else {
+    for (qs = 0; qs < cplxBands; qs++) {
+      pHybOutputRealDry[qs] = fMultDiv2(pHybOutputRealDry[qs], dryFac) << scale;
+      pHybOutputImagDry[qs] = fMultDiv2(pHybOutputImagDry[qs], dryFac) << scale;
+    }
+    for (; qs < hybBands; qs++) {
+      pHybOutputRealDry[qs] = fMultDiv2(pHybOutputRealDry[qs], dryFac) << scale;
+    }
+  }
+}
+
+static void extractBBEnv(spatialDec *self, INT inp, INT start, INT channels,
+                         FIXP_DBL *pEnv, const SPATIAL_BS_FRAME *frame) {
+  INT ch, pb, prevChOffs;
+  INT clz, scale, scale_min, envSF;
+  INT scaleCur, scalePrev, commonScale;
+  INT slotNrgSF, partNrgSF, frameNrgSF;
+  INT *pPartNrgPrevSF, *pFrameNrgPrevSF;
+  INT *pNormNrgPrevSF, *pPartNrgPrev2SF;
+
+  FIXP_DBL maxVal, env, frameNrg, normNrg;
+  FIXP_DBL *pReal, *pImag;
+  FIXP_DBL *partNrg, *partNrgPrev;
+
+  C_ALLOC_SCRATCH_START(pScratchBuffer, FIXP_DBL,
+                        (2 * 42 + MAX_PARAMETER_BANDS));
+  C_ALLOC_SCRATCH_START(resPb, FIXP_DBL, (END_BB_ENV - START_BB_ENV));
+  C_ALLOC_SCRATCH_START(resPbSF, INT, (END_BB_ENV - START_BB_ENV));
+
+  FIXP_DBL *slotNrg = pScratchBuffer + (2 * 42);
+
+  RESHAPE_BBENV_STATE *pBBEnvState = self->reshapeBBEnvState;
+
+  FIXP_DBL alpha = pBBEnvState->alpha__FDK;
+  /*FIXP_DBL  alpha1 = (FL2FXCONST_DBL(1.0f) - alpha) << SF_ALPHA1;*/
+  FIXP_DBL alpha1 = ((FIXP_DBL)MAXVAL_DBL - alpha) << SF_ALPHA1;
+  FIXP_DBL beta = pBBEnvState->beta__FDK;
+  /*FIXP_DBL  beta1  = (FL2FXCONST_DBL(1.0f) - beta) << SF_BETA1;*/
+  FIXP_DBL beta1 = ((FIXP_DBL)MAXVAL_DBL - beta) << SF_BETA1;
+
+  INT shapeActiv = 1;
+  INT hybBands = fixMin(42, self->hybridBands);
+  INT staticScale = self->staticDecScale;
+  INT cplxBands;
+  cplxBands = fixMin(42, self->hybridBands);
+
+  for (ch = start; ch < channels; ch++) {
+    if (inp == INP_DRY_WET) {
+      INT ch2 = row2channelGES[self->treeConfig][ch];
+      if (ch2 == -1) {
+        continue;
+      } else {
+        if (frame->tempShapeEnableChannelGES[ch2]) {
+          shapeActiv = 1;
+        } else {
+          shapeActiv = 0;
+        }
+      }
+      prevChOffs = ch;
+      pReal = pScratchBuffer;
+      pImag = pScratchBuffer + 42;
+      clz = getMaxValDryWet(
+          pReal, pImag, self->hybOutputRealDry__FDK[ch],
+          self->hybOutputImagDry__FDK[ch], self->hybOutputRealWet__FDK[ch],
+          self->hybOutputImagWet__FDK[ch], cplxBands, hybBands);
+    } else {
+      prevChOffs = ch + self->numOutputChannels;
+      pReal = self->hybInputReal__FDK[ch];
+      pImag = self->hybInputImag__FDK[ch];
+      clz = getMaxValDmx(pReal, pImag, cplxBands, hybBands);
+    }
+
+    partNrg = partNrgPrev = pBBEnvState->partNrgPrev__FDK[prevChOffs];
+    pPartNrgPrevSF = &pBBEnvState->partNrgPrevSF[prevChOffs];
+    pFrameNrgPrevSF = &pBBEnvState->frameNrgPrevSF[prevChOffs];
+    pNormNrgPrevSF = &pBBEnvState->normNrgPrevSF[prevChOffs];
+    pPartNrgPrev2SF = &pBBEnvState->partNrgPrev2SF[prevChOffs];
+
+    /* calculate slot energy */
+    {
+      getSlotNrgHQ(&pReal[12], &pImag[12], slotNrg, clz,
+                   fixMin(42, self->hybridBands)); /* scale slotNrg:
+                                                      2*(staticScale-clz) +
+                                                      SF_FACTOR_SLOT */
+    }
+
+    slotNrgSF = 2 * (staticScale - clz) + SF_FACTOR_SLOT;
+    frameNrgSF = 2 * (staticScale - clz) + SF_FACTOR_SLOT;
+
+    partNrgSF = fixMax(slotNrgSF - SF_ALPHA1 + 1,
+                       pPartNrgPrevSF[0] - pPartNrgPrev2SF[0] + 1);
+    scalePrev = fixMax(fixMin(partNrgSF - pPartNrgPrevSF[0], DFRACT_BITS - 1),
+                       -(DFRACT_BITS - 1));
+    scaleCur =
+        fixMax(fixMin(partNrgSF - slotNrgSF + SF_ALPHA1, DFRACT_BITS - 1),
+               -(DFRACT_BITS - 1));
+
+    maxVal = FL2FXCONST_DBL(0.0f);
+    frameNrg = FL2FXCONST_DBL(0.0f);
+    if ((scaleCur < 0) && (scalePrev < 0)) {
+      scaleCur = -scaleCur;
+      scalePrev = -scalePrev;
+      for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+        partNrg[pb] = ((fMultDiv2(alpha1, slotNrg[pb]) << scaleCur) +
+                       (fMultDiv2(alpha, partNrgPrev[pb]) << scalePrev))
+                      << 1;
+        maxVal |= partNrg[pb];
+        frameNrg += slotNrg[pb] >> 3;
+      }
+    } else if ((scaleCur >= 0) && (scalePrev >= 0)) {
+      for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+        partNrg[pb] = ((fMultDiv2(alpha1, slotNrg[pb]) >> scaleCur) +
+                       (fMultDiv2(alpha, partNrgPrev[pb]) >> scalePrev))
+                      << 1;
+        maxVal |= partNrg[pb];
+        frameNrg += slotNrg[pb] >> 3;
+      }
+    } else if ((scaleCur < 0) && (scalePrev >= 0)) {
+      scaleCur = -scaleCur;
+      for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+        partNrg[pb] = ((fMultDiv2(alpha1, slotNrg[pb]) << scaleCur) +
+                       (fMultDiv2(alpha, partNrgPrev[pb]) >> scalePrev))
+                      << 1;
+        maxVal |= partNrg[pb];
+        frameNrg += slotNrg[pb] >> 3;
+      }
+    } else { /* if ( (scaleCur >= 0) && (scalePrev < 0) ) */
+      scalePrev = -scalePrev;
+      for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+        partNrg[pb] = ((fMultDiv2(alpha1, slotNrg[pb]) >> scaleCur) +
+                       (fMultDiv2(alpha, partNrgPrev[pb]) << scalePrev))
+                      << 1;
+        maxVal |= partNrg[pb];
+        frameNrg += slotNrg[pb] >> 3;
+      }
+    }
+
+    /* frameNrg /= (END_BB_ENV - START_BB_ENV); 0.88888888888f =
+     * (1/(END_BB_ENV-START_BB_ENV)<<3; shift with 3 is compensated in loop
+     * above */
+    frameNrg = fMult(frameNrg, FL2FXCONST_DBL(0.88888888888f));
+
+    /* store scalefactor and headroom for part nrg prev */
+    pPartNrgPrevSF[0] = partNrgSF;
+    pPartNrgPrev2SF[0] = fixMax(0, CntLeadingZeros(maxVal) - 1);
+
+    commonScale = fixMax(frameNrgSF - SF_ALPHA1 + 1, pFrameNrgPrevSF[0] + 1);
+    scalePrev = fixMin(commonScale - pFrameNrgPrevSF[0], DFRACT_BITS - 1);
+    scaleCur = fixMin(commonScale - frameNrgSF + SF_ALPHA1, DFRACT_BITS - 1);
+    frameNrgSF = commonScale;
+
+    frameNrg = ((fMultDiv2(alpha1, frameNrg) >> scaleCur) +
+                (fMultDiv2(alpha, pBBEnvState->frameNrgPrev__FDK[prevChOffs]) >>
+                 scalePrev))
+               << 1;
+
+    clz = fixMax(0, CntLeadingZeros(frameNrg) - 1);
+    pBBEnvState->frameNrgPrev__FDK[prevChOffs] = frameNrg << clz;
+    pFrameNrgPrevSF[0] = frameNrgSF - clz;
+
+    env = FL2FXCONST_DBL(0.0f);
+    scale = clz + partNrgSF - frameNrgSF;
+    scale_min = DFRACT_BITS - 1;
+    for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+      if ((partNrg[pb] | slotNrg[pb]) != FL2FXCONST_DBL(0.0f)) {
+        INT s;
+        INT sc = 0;
+        INT sn = fixMax(0, CntLeadingZeros(slotNrg[pb]) - 1);
+        FIXP_DBL inv_sqrt = invSqrtNorm2(partNrg[pb], &sc);
+        FIXP_DBL res = fMult(slotNrg[pb] << sn, fPow2(inv_sqrt));
+
+        s = fixMax(0, CntLeadingZeros(res) - 1);
+        res = res << s;
+
+        sc = scale - (2 * sc - sn - s);
+        scale_min = fixMin(scale_min, sc);
+
+        resPb[pb] = res;
+        resPbSF[pb] = sc;
+      } else {
+        resPb[pb] = (FIXP_DBL)0;
+        resPbSF[pb] = 0;
+      }
+    }
+
+    scale_min = 4 - scale_min;
+
+    for (pb = START_BB_ENV; pb < END_BB_ENV; pb++) {
+      INT sc = fixMax(fixMin(resPbSF[pb] + scale_min, DFRACT_BITS - 1),
+                      -(DFRACT_BITS - 1));
+
+      if (sc < 0) {
+        env += resPb[pb] << (-sc);
+      } else {
+        env += resPb[pb] >> (sc);
+      }
+    }
+
+    env = fMultDiv2(env, pBBEnvState->frameNrgPrev__FDK[prevChOffs]);
+    envSF = slotNrgSF + scale_min + 1;
+
+    commonScale = fixMax(envSF - SF_BETA1 + 1, pNormNrgPrevSF[0] + 1);
+    scalePrev = fixMin(commonScale - pNormNrgPrevSF[0], DFRACT_BITS - 1);
+    scaleCur = fixMin(commonScale - envSF + SF_BETA1, DFRACT_BITS - 1);
+
+    normNrg = ((fMultDiv2(beta1, env) >> scaleCur) +
+               (fMultDiv2(beta, pBBEnvState->normNrgPrev__FDK[prevChOffs]) >>
+                scalePrev))
+              << 1;
+
+    clz = fixMax(0, CntLeadingZeros(normNrg) - 1);
+    pBBEnvState->normNrgPrev__FDK[prevChOffs] = normNrg << clz;
+    pNormNrgPrevSF[0] = commonScale - clz;
+
+    if (shapeActiv) {
+      if ((env | normNrg) != FL2FXCONST_DBL(0.0f)) {
+        INT sc, se, sn;
+        se = fixMax(0, CntLeadingZeros(env) - 1);
+        sc = commonScale + SF_DIV32 - envSF + se;
+        env = fMult(sqrtFixp((env << se) >> (sc & 0x1)),
+                    invSqrtNorm2(normNrg, &sn));
+
+        sc = fixMin((sc >> 1) - sn, DFRACT_BITS - 1);
+        if (sc < 0) {
+          env <<= (-sc);
+        } else {
+          env >>= (sc);
+        }
+      }
+      /* env is scaled by SF_DIV32/2 bits */
+    }
+    pEnv[ch] = env;
+  }
+
+  C_ALLOC_SCRATCH_END(resPbSF, INT, (END_BB_ENV - START_BB_ENV));
+  C_ALLOC_SCRATCH_END(resPb, FIXP_DBL, (END_BB_ENV - START_BB_ENV));
+  C_ALLOC_SCRATCH_END(pScratchBuffer, FIXP_DBL, (2 * 42 + MAX_PARAMETER_BANDS));
+}
+
+void SpatialDecReshapeBBEnv(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                            INT ts) {
+  INT ch, scale;
+  INT dryFacSF, slotAmpSF;
+  FIXP_DBL tmp, dryFac, envShape;
+  FIXP_DBL slotAmp_dry, slotAmp_wet, slotAmp_ratio;
+  FIXP_DBL envDry[MAX_OUTPUT_CHANNELS], envDmx[2];
+
+  INT cplxBands;
+  INT hybBands = self->hybridBands - 6;
+
+  cplxBands = self->hybridBands - 6;
+
+  /* extract downmix envelope(s) */
+  switch (self->treeConfig) {
+    default:
+      extractBBEnv(self, INP_DMX, 0, fMin(self->numInputChannels, 2), envDmx,
+                   frame);
+  }
+
+  /* extract dry and wet envelopes */
+  extractBBEnv(self, INP_DRY_WET, 0, self->numOutputChannels, envDry, frame);
+
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    INT ch2;
+
+    ch2 = row2channelGES[self->treeConfig][ch];
+
+    if (ch2 == -1) continue;
+
+    if (frame->tempShapeEnableChannelGES[ch2]) {
+      INT sc;
+
+      /* reshape dry and wet signals according to transmitted envelope */
+
+      /* De-quantize GES data */
+      FDK_ASSERT((frame->bsEnvShapeData[ch2][ts] >= 0) &&
+                 (frame->bsEnvShapeData[ch2][ts] <= 4));
+      FDK_ASSERT((self->envQuantMode == 0) || (self->envQuantMode == 1));
+      envShape =
+          FX_CFG2FX_DBL(envShapeDataTable__FDK[frame->bsEnvShapeData[ch2][ts]]
+                                              [self->envQuantMode]);
+
+      /* get downmix channel */
+      ch2 = self->row2channelDmxGES[ch];
+
+      /* multiply ratio with dmx envelope; tmp is scaled by SF_DIV32/2+SF_SHAPE
+       * bits */
+      if (ch2 == 2) {
+        tmp = fMultDiv2(envShape, envDmx[0]) + fMultDiv2(envShape, envDmx[1]);
+      } else {
+        tmp = fMult(envShape, envDmx[ch2]);
+      }
+
+      /* weighting factors */
+      dryFacSF = slotAmpSF = 0;
+      dryFac = slotAmp_ratio = FL2FXCONST_DBL(0.0f);
+
+      /* dryFac will be scaled by dryFacSF bits */
+      if (envDry[ch] != FL2FXCONST_DBL(0.0f)) {
+        envDry[ch] = invSqrtNorm2(envDry[ch], &dryFacSF);
+        dryFac = fMultDiv2(tmp, fPow2Div2(envDry[ch])) << 2;
+        dryFacSF = SF_SHAPE + 2 * dryFacSF;
+      }
+
+      /* calculate slotAmp_dry and slotAmp_wet */
+      slotAmp(&slotAmp_dry, &slotAmp_wet, &self->hybOutputRealDry__FDK[ch][6],
+              &self->hybOutputImagDry__FDK[ch][6],
+              &self->hybOutputRealWet__FDK[ch][6],
+              &self->hybOutputImagWet__FDK[ch][6], cplxBands, hybBands);
+
+      /* slotAmp_ratio will be scaled by slotAmpSF bits */
+      if (slotAmp_dry != FL2FXCONST_DBL(0.0f)) {
+        sc = fixMax(0, CntLeadingZeros(slotAmp_wet) - 1);
+        sc = sc - (sc & 1);
+
+        slotAmp_wet = sqrtFixp(slotAmp_wet << sc);
+        slotAmp_dry = invSqrtNorm2(slotAmp_dry, &slotAmpSF);
+
+        slotAmp_ratio = fMult(slotAmp_wet, slotAmp_dry);
+        slotAmpSF = slotAmpSF - (sc >> 1);
+      }
+
+      /* calculate common scale factor */
+      scale =
+          fixMax(3, fixMax(dryFacSF, slotAmpSF)); /* scale is at least with 3
+                                                     bits to avoid overflows
+                                                     when calculating dryFac  */
+      dryFac = dryFac >> (scale - dryFacSF);
+      slotAmp_ratio = slotAmp_ratio >> (scale - slotAmpSF);
+
+      /* limit dryFac */
+      dryFac = fixMax(
+          FL2FXCONST_DBL(0.25f) >> (INT)fixMin(2 * scale, DFRACT_BITS - 1),
+          fMult(dryFac, slotAmp_ratio) - (slotAmp_ratio >> scale) +
+              (dryFac >> scale));
+      dryFac = fixMin(
+          FL2FXCONST_DBL(0.50f) >> (INT)fixMin(2 * scale - 3, DFRACT_BITS - 1),
+          dryFac); /* reduce shift bits by 3, because upper
+                      limit 4.0 is scaled with 3 bits */
+      scale = 2 * scale + 1;
+
+      /* improve precision for dryFac */
+      sc = fixMax(0, CntLeadingZeros(dryFac) - 1);
+      dryFac = dryFac << (INT)fixMin(scale, sc);
+      scale = scale - fixMin(scale, sc);
+
+      /* shaping */
+      shapeBBEnv(&self->hybOutputRealDry__FDK[ch][6],
+                 &self->hybOutputImagDry__FDK[ch][6], dryFac, scale, cplxBands,
+                 hybBands);
+    }
+  }
+}
diff --git a/fdk-aac/libSACdec/src/sac_reshapeBBEnv.h b/fdk-aac/libSACdec/src/sac_reshapeBBEnv.h
new file mode 100644
index 0000000..1658530
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_reshapeBBEnv.h
@@ -0,0 +1,114 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec guided envelope shaping
+
+*******************************************************************************/
+
+#ifndef SAC_RESHAPEBBENV_H
+#define SAC_RESHAPEBBENV_H
+
+#include "sac_dec_interface.h"
+
+#define BB_ENV_SIZE 9 /* END_BB_ENV - START_BB_ENV */
+
+void initBBEnv(spatialDec *self, int initStatesFlag);
+void SpatialDecReshapeBBEnv(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                            int ts);
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_rom.cpp b/fdk-aac/libSACdec/src/sac_rom.cpp
new file mode 100644
index 0000000..4285b65
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_rom.cpp
@@ -0,0 +1,709 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec tables
+
+*******************************************************************************/
+
+#include "sac_rom.h"
+#include "sac_calcM1andM2.h"
+
+#define SCALE_CPC(a) (FL2FXCONST_CFG(a / (float)(1 << SCALE_PARAM_M1)))
+const FIXP_CFG dequantCPC__FDK[] = {
+    SCALE_CPC(-2.0f), SCALE_CPC(-1.9f), SCALE_CPC(-1.8f), SCALE_CPC(-1.7f),
+    SCALE_CPC(-1.6f), SCALE_CPC(-1.5f), SCALE_CPC(-1.4f), SCALE_CPC(-1.3f),
+    SCALE_CPC(-1.2f), SCALE_CPC(-1.1f), SCALE_CPC(-1.0f), SCALE_CPC(-0.9f),
+    SCALE_CPC(-0.8f), SCALE_CPC(-0.7f), SCALE_CPC(-0.6f), SCALE_CPC(-0.5f),
+    SCALE_CPC(-0.4f), SCALE_CPC(-0.3f), SCALE_CPC(-0.2f), SCALE_CPC(-0.1f),
+    SCALE_CPC(0.0f),  SCALE_CPC(0.1f),  SCALE_CPC(0.2f),  SCALE_CPC(0.3f),
+    SCALE_CPC(0.4f),  SCALE_CPC(0.5f),  SCALE_CPC(0.6f),  SCALE_CPC(0.7f),
+    SCALE_CPC(0.8f),  SCALE_CPC(0.9f),  SCALE_CPC(1.0f),  SCALE_CPC(1.1f),
+    SCALE_CPC(1.2f),  SCALE_CPC(1.3f),  SCALE_CPC(1.4f),  SCALE_CPC(1.5f),
+    SCALE_CPC(1.6f),  SCALE_CPC(1.7f),  SCALE_CPC(1.8f),  SCALE_CPC(1.9f),
+    SCALE_CPC(2.0f),  SCALE_CPC(2.1f),  SCALE_CPC(2.2f),  SCALE_CPC(2.3f),
+    SCALE_CPC(2.4f),  SCALE_CPC(2.5f),  SCALE_CPC(2.6f),  SCALE_CPC(2.7f),
+    SCALE_CPC(2.8f),  SCALE_CPC(2.9f),  SCALE_CPC(3.0f)};
+
+#define SCALE_ICC(a) (FL2FXCONST_CFG(a))
+const FIXP_CFG dequantICC__FDK[8] = {
+    /*SCALE_ICC(1.00000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL),
+    SCALE_ICC(0.9370f),
+    SCALE_ICC(0.84118f),
+    SCALE_ICC(0.60092f),
+    SCALE_ICC(0.36764f),
+    SCALE_ICC(0.0000f),
+    SCALE_ICC(-0.58900f),
+    SCALE_ICC(-0.9900f)};
+
+#define SCALE_CLD2(a) (FL2FXCONST_CFG(a / (float)(1 << 8)))
+const FIXP_CFG dequantCLD__FDK[31] = {
+    SCALE_CLD2(-150.0f), SCALE_CLD2(-45.0f), SCALE_CLD2(-40.0f),
+    SCALE_CLD2(-35.0f),  SCALE_CLD2(-30.0f), SCALE_CLD2(-25.0f),
+    SCALE_CLD2(-22.0f),  SCALE_CLD2(-19.0f), SCALE_CLD2(-16.0f),
+    SCALE_CLD2(-13.0f),  SCALE_CLD2(-10.0f), SCALE_CLD2(-8.0f),
+    SCALE_CLD2(-6.0f),   SCALE_CLD2(-4.0f),  SCALE_CLD2(-2.0f),
+    SCALE_CLD2(0.0f),    SCALE_CLD2(2.0f),   SCALE_CLD2(4.0f),
+    SCALE_CLD2(6.0f),    SCALE_CLD2(8.0f),   SCALE_CLD2(10.0f),
+    SCALE_CLD2(13.0f),   SCALE_CLD2(16.0f),  SCALE_CLD2(19.0f),
+    SCALE_CLD2(22.0f),   SCALE_CLD2(25.0f),  SCALE_CLD2(30.0f),
+    SCALE_CLD2(35.0f),   SCALE_CLD2(40.0f),  SCALE_CLD2(45.0f),
+    SCALE_CLD2(150.0f)};
+
+#define SCALE_IPD(a) (FL2FXCONST_CFG(a / (float)(1 << IPD_SCALE)))
+const FIXP_CFG dequantIPD__FDK[16] = {
+    /* SCALE_IPD(0.000000000f), SCALE_IPD(0.392699082f),
+       SCALE_IPD(0.785398163f), SCALE_IPD(1.178097245f),
+       SCALE_IPD(1.570796327f), SCALE_IPD(1.963495408f),
+       SCALE_IPD(2.356194490f), SCALE_IPD(2.748893572f),
+       SCALE_IPD(3.141592654f), SCALE_IPD(3.534291735f),
+       SCALE_IPD(3.926990817f), SCALE_IPD(4.319689899f),
+       SCALE_IPD(4.712388980f), SCALE_IPD(5.105088062f),
+       SCALE_IPD(5.497787144f), SCALE_IPD(5.890486225f) */
+    SCALE_IPD(0.00000000000000f), SCALE_IPD(0.392699082f),
+    SCALE_IPD(0.78539816339745f), SCALE_IPD(1.178097245f),
+    SCALE_IPD(1.57079632679490f), SCALE_IPD(1.963495408f),
+    SCALE_IPD(2.35619449019234f), SCALE_IPD(2.748893572f),
+    SCALE_IPD(3.14159265358979f), SCALE_IPD(3.534291735f),
+    SCALE_IPD(3.92699081698724f), SCALE_IPD(4.319689899f),
+    SCALE_IPD(4.71238898038469f), SCALE_IPD(5.105088062f),
+    SCALE_IPD(5.49778714378214f), SCALE_IPD(5.890486225f)};
+
+#define SCALE_SPLIT_ANGLE(a) (FL2FXCONST_CFG(a / (float)(1 << IPD_SCALE)))
+/*
+  Generate table dequantIPD_CLD_ICC_splitAngle__FDK[16][31][8]:
+
+  #define ABS_THR                         ( 1e-9f * 32768 * 32768 )
+
+  float dequantICC[] =
+  {1.0000f,0.9370f,0.84118f,0.60092f,0.36764f,0.0f,-0.5890f,-0.9900f}; float
+  dequantCLD[] =
+  {-150.0,-45.0,-40.0,-35.0,-30.0,-25.0,-22.0,-19.0,-16.0,-13.0,-10.0, -8.0,
+                          -6.0, -4.0, -2.0,  0.0,  2.0,  4.0,  6.0,  8.0,
+  10.0, 13.0, 16.0, 19.0, 22.0, 25.0, 30.0, 35.0, 40.0, 45.0, 150.0 }; float
+  dequantIPD[] =
+  {0.f,0.392699082f,0.785398163f,1.178097245f,1.570796327f,1.963495408f,
+                        2.35619449f,2.748893572f,3.141592654f,3.534291735f,3.926990817f,
+                        4.319689899f,4.71238898f,5.105088062f,5.497787144f,5.890486225f};
+
+  for (ipdIdx=0; ipdIdx<16; ipdIdx++)
+    for (cldIdx=0; cldIdx<31; cldIdx++)
+      for (iccIdx=0; iccIdx<8; iccIdx++) {
+        ipd = dequantIPD[ipdIdx];
+        cld = dequantCLD[cldIdx];
+        icc = dequantICC[iccIdx];
+        iidLin = (float) pow(10.0f, cld / 20.0f);
+        iidLin2 = iidLin * iidLin;
+        iidLin21 = iidLin2 + 1.0f;
+        sinIpd = (float) sin(ipd);
+        cosIpd = (float) cos(ipd);
+        temp1 = 2.0f * icc * iidLin;
+        temp1c = temp1 * cosIpd;
+        ratio = (iidLin21 + temp1c) / (iidLin21 + temp1) + ABS_THR;
+        w2 = (float) pow(ratio, 0.25f);
+        w1 = 2.0f - w2;
+        dequantIPD_CLD_ICC_splitAngle__FDK[ipdIdx][cldIdx][iccIdx] = (float)
+  atan2(w2 * sinIpd, w1 * iidLin + w2 * cosIpd);
+      }
+*/
+
+#define SCALE_CLD(a) (FL2FXCONST_CFG(a))
+
+const FIXP_CFG dequantCLD_c_l[31] = {
+    SCALE_CLD(0.0000000316f),
+    SCALE_CLD(0.0056233243f),
+    SCALE_CLD(0.0099994997f),
+    SCALE_CLD(0.0177799836f),
+    SCALE_CLD(0.0316069759f),
+    SCALE_CLD(0.0561454296f),
+    SCALE_CLD(0.0791834071f),
+    SCALE_CLD(0.1115021780f),
+    SCALE_CLD(0.1565355062f),
+    SCALE_CLD(0.2184644639f),
+    SCALE_CLD(0.3015113473f),
+    SCALE_CLD(0.3698741496f),
+    SCALE_CLD(0.4480624795f),
+    SCALE_CLD(0.5336171389f),
+    SCALE_CLD(0.6219832301f),
+    SCALE_CLD(0.7071067691f),
+    SCALE_CLD(0.7830305696f),
+    SCALE_CLD(0.8457261920f),
+    SCALE_CLD(0.8940021992f),
+    SCALE_CLD(0.9290818572f),
+    SCALE_CLD(0.9534626007f),
+    SCALE_CLD(0.9758449197f),
+    SCALE_CLD(0.9876723289f),
+    SCALE_CLD(0.9937641621f),
+    SCALE_CLD(0.9968600869f),
+    SCALE_CLD(0.9984226227f),
+    SCALE_CLD(0.9995003939f),
+    SCALE_CLD(0.9998419285f),
+    SCALE_CLD(0.9999499917f),
+    SCALE_CLD(0.9999842048f),
+    /*SCALE_CLD(1.0000000000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL)};
+
+#define SC_H(a) (FL2FXCONST_CFG(a))
+#define DATA_TYPE_H FIXP_CFG
+
+/* not correlated  tables */
+const DATA_TYPE_H H11_nc[31][8] = {
+    {SC_H(0.0000000316f), SC_H(0.0000000296f), SC_H(0.0000000266f),
+     SC_H(0.0000000190f), SC_H(0.0000000116f), SC_H(0.0000000000f),
+     SC_H(-0.0000000186f), SC_H(-0.0000000313f)},
+    {SC_H(0.0056233243f), SC_H(0.0052728835f), SC_H(0.0047394098f),
+     SC_H(0.0033992692f), SC_H(0.0020946222f), SC_H(0.0000316215f),
+     SC_H(-0.0032913829f), SC_H(-0.0055664564f)},
+    {SC_H(0.0099994997f), SC_H(0.0093815643f), SC_H(0.0084402543f),
+     SC_H(0.0060722125f), SC_H(0.0037622179f), SC_H(0.0000999898f),
+     SC_H(-0.0058238208f), SC_H(-0.0098974844f)},
+    {SC_H(0.0177799836f), SC_H(0.0166974831f), SC_H(0.0150465844f),
+     SC_H(0.0108831404f), SC_H(0.0068073822f), SC_H(0.0003161267f),
+     SC_H(-0.0102626514f), SC_H(-0.0175957214f)},
+    {SC_H(0.0316069759f), SC_H(0.0297324844f), SC_H(0.0268681273f),
+     SC_H(0.0196138974f), SC_H(0.0124691967f), SC_H(0.0009989988f),
+     SC_H(-0.0179452803f), SC_H(-0.0312700421f)},
+    {SC_H(0.0561454296f), SC_H(0.0529650487f), SC_H(0.0480896905f),
+     SC_H(0.0356564634f), SC_H(0.0232860073f), SC_H(0.0031523081f),
+     SC_H(-0.0309029408f), SC_H(-0.0555154830f)},
+    {SC_H(0.0791834071f), SC_H(0.0748842582f), SC_H(0.0682762116f),
+     SC_H(0.0513241664f), SC_H(0.0343080349f), SC_H(0.0062700072f),
+     SC_H(-0.0422340371f), SC_H(-0.0782499388f)},
+    {SC_H(0.1115021780f), SC_H(0.1057924852f), SC_H(0.0969873071f),
+     SC_H(0.0742305145f), SC_H(0.0511277616f), SC_H(0.0124327289f),
+     SC_H(-0.0566596612f), SC_H(-0.1100896299f)},
+    {SC_H(0.1565355062f), SC_H(0.1491366178f), SC_H(0.1376826316f),
+     SC_H(0.1078186408f), SC_H(0.0770794004f), SC_H(0.0245033558f),
+     SC_H(-0.0735980421f), SC_H(-0.1543303132f)},
+    {SC_H(0.2184644639f), SC_H(0.2091979682f), SC_H(0.1947948188f),
+     SC_H(0.1568822265f), SC_H(0.1172478944f), SC_H(0.0477267131f),
+     SC_H(-0.0899507254f), SC_H(-0.2148526460f)},
+    {SC_H(0.3015113473f), SC_H(0.2904391289f), SC_H(0.2731673419f),
+     SC_H(0.2273024023f), SC_H(0.1786239147f), SC_H(0.0909090787f),
+     SC_H(-0.0964255333f), SC_H(-0.2951124907f)},
+    {SC_H(0.3698741496f), SC_H(0.3578284085f), SC_H(0.3390066922f),
+     SC_H(0.2888108492f), SC_H(0.2351117432f), SC_H(0.1368068755f),
+     SC_H(-0.0850296095f), SC_H(-0.3597966135f)},
+    {SC_H(0.4480624795f), SC_H(0.4354025424f), SC_H(0.4156077504f),
+     SC_H(0.3627120256f), SC_H(0.3058823943f), SC_H(0.2007599771f),
+     SC_H(-0.0484020934f), SC_H(-0.4304940701f)},
+    {SC_H(0.5336171389f), SC_H(0.5208471417f), SC_H(0.5008935928f),
+     SC_H(0.4476420581f), SC_H(0.3905044496f), SC_H(0.2847472429f),
+     SC_H(0.0276676007f), SC_H(-0.4966579080f)},
+    {SC_H(0.6219832301f), SC_H(0.6096963882f), SC_H(0.5905415416f),
+     SC_H(0.5396950245f), SC_H(0.4856070578f), SC_H(0.3868631124f),
+     SC_H(0.1531652957f), SC_H(-0.5045361519f)},
+    {SC_H(0.7071067691f), SC_H(0.6958807111f), SC_H(0.6784504056f),
+     SC_H(0.6326373219f), SC_H(0.5847306848f), SC_H(0.4999999702f),
+     SC_H(0.3205464482f), SC_H(0.0500000045f)},
+    {SC_H(0.7830305696f), SC_H(0.7733067870f), SC_H(0.7582961321f),
+     SC_H(0.7194055915f), SC_H(0.6797705293f), SC_H(0.6131368876f),
+     SC_H(0.4997332692f), SC_H(0.6934193969f)},
+    {SC_H(0.8457261920f), SC_H(0.8377274871f), SC_H(0.8254694939f),
+     SC_H(0.7942851782f), SC_H(0.7635439038f), SC_H(0.7152527571f),
+     SC_H(0.6567122936f), SC_H(0.8229061961f)},
+    {SC_H(0.8940021992f), SC_H(0.8877248168f), SC_H(0.8781855106f),
+     SC_H(0.8544237614f), SC_H(0.8318918347f), SC_H(0.7992399335f),
+     SC_H(0.7751275301f), SC_H(0.8853276968f)},
+    {SC_H(0.9290818572f), SC_H(0.9243524075f), SC_H(0.9172304869f),
+     SC_H(0.8998877406f), SC_H(0.8841174841f), SC_H(0.8631930947f),
+     SC_H(0.8565139771f), SC_H(0.9251161218f)},
+    {SC_H(0.9534626007f), SC_H(0.9500193000f), SC_H(0.9448821545f),
+     SC_H(0.9326565266f), SC_H(0.9220023751f), SC_H(0.9090909362f),
+     SC_H(0.9096591473f), SC_H(0.9514584541f)},
+    {SC_H(0.9758449197f), SC_H(0.9738122821f), SC_H(0.9708200693f),
+     SC_H(0.9639287591f), SC_H(0.9582763910f), SC_H(0.9522733092f),
+     SC_H(0.9553207159f), SC_H(0.9750427008f)},
+    {SC_H(0.9876723289f), SC_H(0.9865267277f), SC_H(0.9848603010f),
+     SC_H(0.9811310172f), SC_H(0.9782302976f), SC_H(0.9754966497f),
+     SC_H(0.9779621363f), SC_H(0.9873252511f)},
+    {SC_H(0.9937641621f), SC_H(0.9931397438f), SC_H(0.9922404289f),
+     SC_H(0.9902750254f), SC_H(0.9888116717f), SC_H(0.9875672460f),
+     SC_H(0.9891131520f), SC_H(0.9936066866f)},
+    {SC_H(0.9968600869f), SC_H(0.9965277910f), SC_H(0.9960530400f),
+     SC_H(0.9950347543f), SC_H(0.9943022728f), SC_H(0.9937300086f),
+     SC_H(0.9946073294f), SC_H(0.9967863560f)},
+    {SC_H(0.9984226227f), SC_H(0.9982488155f), SC_H(0.9980020523f),
+     SC_H(0.9974802136f), SC_H(0.9971146584f), SC_H(0.9968476892f),
+     SC_H(0.9973216057f), SC_H(0.9983873963f)},
+    {SC_H(0.9995003939f), SC_H(0.9994428754f), SC_H(0.9993617535f),
+     SC_H(0.9991930723f), SC_H(0.9990783334f), SC_H(0.9990010262f),
+     SC_H(0.9991616607f), SC_H(0.9994897842f)},
+    {SC_H(0.9998419285f), SC_H(0.9998232722f), SC_H(0.9997970462f),
+     SC_H(0.9997430444f), SC_H(0.9997069836f), SC_H(0.9996838570f),
+     SC_H(0.9997364879f), SC_H(0.9998386502f)},
+    {SC_H(0.9999499917f), SC_H(0.9999440312f), SC_H(0.9999356270f),
+     SC_H(0.9999184012f), SC_H(0.9999070764f), SC_H(0.9998999834f),
+     SC_H(0.9999169707f), SC_H(0.9999489784f)},
+    {SC_H(0.9999842048f), SC_H(0.9999822974f), SC_H(0.9999796152f),
+     SC_H(0.9999741912f), SC_H(0.9999706149f), SC_H(0.9999684095f),
+     SC_H(0.9999738336f), SC_H(0.9999839067f)},
+    /* { SC_H( 1.0000000000f), SC_H( 1.0000000000f), SC_H( 1.0000000000f),
+       SC_H( 1.0000000000f), SC_H( 1.0000000000f), SC_H( 1.0000000000f),
+       SC_H( 1.0000000000f), SC_H( 1.0000000000f)} */
+    {FX_DBL2FX_CFG(MAXVAL_DBL), FX_DBL2FX_CFG(MAXVAL_DBL),
+     FX_DBL2FX_CFG(MAXVAL_DBL), FX_DBL2FX_CFG(MAXVAL_DBL),
+     FX_DBL2FX_CFG(MAXVAL_DBL), FX_DBL2FX_CFG(MAXVAL_DBL),
+     FX_DBL2FX_CFG(MAXVAL_DBL), FX_DBL2FX_CFG(MAXVAL_DBL)}};
+const DATA_TYPE_H H12_nc[31][8] = {
+    {SC_H(0.0000000000f), SC_H(0.0000000110f), SC_H(0.0000000171f),
+     SC_H(0.0000000253f), SC_H(0.0000000294f), SC_H(0.0000000316f),
+     SC_H(0.0000000256f), SC_H(0.0000000045f)},
+    {SC_H(0.0000000000f), SC_H(0.0019540924f), SC_H(0.0030265113f),
+     SC_H(0.0044795922f), SC_H(0.0052186525f), SC_H(0.0056232354f),
+     SC_H(0.0045594489f), SC_H(0.0007977085f)},
+    {SC_H(0.0000000000f), SC_H(0.0034606720f), SC_H(0.0053620986f),
+     SC_H(0.0079446984f), SC_H(0.0092647560f), SC_H(0.0099989995f),
+     SC_H(0.0081285369f), SC_H(0.0014247064f)},
+    {SC_H(0.0000000000f), SC_H(0.0061091618f), SC_H(0.0094724922f),
+     SC_H(0.0140600521f), SC_H(0.0164252054f), SC_H(0.0177771728f),
+     SC_H(0.0145191532f), SC_H(0.0025531140f)},
+    {SC_H(0.0000000000f), SC_H(0.0107228858f), SC_H(0.0166464616f),
+     SC_H(0.0247849934f), SC_H(0.0290434174f), SC_H(0.0315911844f),
+     SC_H(0.0260186065f), SC_H(0.0046027615f)},
+    {SC_H(0.0000000000f), SC_H(0.0186282862f), SC_H(0.0289774220f),
+     SC_H(0.0433696397f), SC_H(0.0510888547f), SC_H(0.0560568646f),
+     SC_H(0.0468755551f), SC_H(0.0083869267f)},
+    {SC_H(0.0000000000f), SC_H(0.0257363543f), SC_H(0.0401044972f),
+     SC_H(0.0602979437f), SC_H(0.0713650510f), SC_H(0.0789347738f),
+     SC_H(0.0669798329f), SC_H(0.0121226767f)},
+    {SC_H(0.0000000000f), SC_H(0.0352233723f), SC_H(0.0550108925f),
+     SC_H(0.0832019597f), SC_H(0.0990892947f), SC_H(0.1108068749f),
+     SC_H(0.0960334241f), SC_H(0.0176920593f)},
+    {SC_H(0.0000000000f), SC_H(0.0475566536f), SC_H(0.0744772255f),
+     SC_H(0.1134835035f), SC_H(0.1362429112f), SC_H(0.1546057910f),
+     SC_H(0.1381545961f), SC_H(0.0261824392f)},
+    {SC_H(0.0000000000f), SC_H(0.0629518181f), SC_H(0.0989024863f),
+     SC_H(0.1520351619f), SC_H(0.1843357086f), SC_H(0.2131874412f),
+     SC_H(0.1990868896f), SC_H(0.0395608991f)},
+    {SC_H(0.0000000000f), SC_H(0.0809580907f), SC_H(0.1276271492f),
+     SC_H(0.1980977356f), SC_H(0.2429044843f), SC_H(0.2874797881f),
+     SC_H(0.2856767476f), SC_H(0.0617875643f)},
+    {SC_H(0.0000000000f), SC_H(0.0936254337f), SC_H(0.1479234397f),
+     SC_H(0.2310739607f), SC_H(0.2855334580f), SC_H(0.3436433673f),
+     SC_H(0.3599678576f), SC_H(0.0857512727f)},
+    {SC_H(0.0000000000f), SC_H(0.1057573780f), SC_H(0.1674221754f),
+     SC_H(0.2630588412f), SC_H(0.3274079263f), SC_H(0.4005688727f),
+     SC_H(0.4454404712f), SC_H(0.1242370531f)},
+    {SC_H(0.0000000000f), SC_H(0.1160409302f), SC_H(0.1839915067f),
+     SC_H(0.2904545665f), SC_H(0.3636667728f), SC_H(0.4512939751f),
+     SC_H(0.5328993797f), SC_H(0.1951362640f)},
+    {SC_H(0.0000000000f), SC_H(0.1230182052f), SC_H(0.1952532977f),
+     SC_H(0.3091802597f), SC_H(0.3886501491f), SC_H(0.4870318770f),
+     SC_H(0.6028295755f), SC_H(0.3637395203f)},
+    {SC_H(0.0000000000f), SC_H(0.1254990250f), SC_H(0.1992611140f),
+     SC_H(0.3158638775f), SC_H(0.3976053298f), SC_H(0.5000000000f),
+     SC_H(0.6302776933f), SC_H(0.7053368092f)},
+    {SC_H(0.0000000000f), SC_H(0.1230182052f), SC_H(0.1952533126f),
+     SC_H(0.3091802597f), SC_H(0.3886501491f), SC_H(0.4870319068f),
+     SC_H(0.6028295755f), SC_H(0.3637394905f)},
+    {SC_H(0.0000000000f), SC_H(0.1160409302f), SC_H(0.1839915216f),
+     SC_H(0.2904545665f), SC_H(0.3636668026f), SC_H(0.4512939751f),
+     SC_H(0.5328993797f), SC_H(0.1951362044f)},
+    {SC_H(0.0000000000f), SC_H(0.1057573855f), SC_H(0.1674221754f),
+     SC_H(0.2630588710f), SC_H(0.3274079263f), SC_H(0.4005688727f),
+     SC_H(0.4454405010f), SC_H(0.1242370382f)},
+    {SC_H(0.0000000000f), SC_H(0.0936254337f), SC_H(0.1479234397f),
+     SC_H(0.2310739607f), SC_H(0.2855334580f), SC_H(0.3436433673f),
+     SC_H(0.3599678576f), SC_H(0.0857512653f)},
+    {SC_H(0.0000000000f), SC_H(0.0809580907f), SC_H(0.1276271492f),
+     SC_H(0.1980977207f), SC_H(0.2429044843f), SC_H(0.2874797881f),
+     SC_H(0.2856767476f), SC_H(0.0617875606f)},
+    {SC_H(0.0000000000f), SC_H(0.0629518107f), SC_H(0.0989024863f),
+     SC_H(0.1520351619f), SC_H(0.1843357235f), SC_H(0.2131874412f),
+     SC_H(0.1990868896f), SC_H(0.0395609401f)},
+    {SC_H(0.0000000000f), SC_H(0.0475566462f), SC_H(0.0744772255f),
+     SC_H(0.1134835184f), SC_H(0.1362429112f), SC_H(0.1546057761f),
+     SC_H(0.1381545961f), SC_H(0.0261824802f)},
+    {SC_H(0.0000000000f), SC_H(0.0352233797f), SC_H(0.0550108962f),
+     SC_H(0.0832019448f), SC_H(0.0990892798f), SC_H(0.1108068526f),
+     SC_H(0.0960334465f), SC_H(0.0176920686f)},
+    {SC_H(0.0000000000f), SC_H(0.0257363524f), SC_H(0.0401044935f),
+     SC_H(0.0602979474f), SC_H(0.0713650808f), SC_H(0.0789347589f),
+     SC_H(0.0669797957f), SC_H(0.0121226516f)},
+    {SC_H(0.0000000000f), SC_H(0.0186282881f), SC_H(0.0289774258f),
+     SC_H(0.0433696248f), SC_H(0.0510888547f), SC_H(0.0560568906f),
+     SC_H(0.0468755886f), SC_H(0.0083869714f)},
+    {SC_H(0.0000000000f), SC_H(0.0107228830f), SC_H(0.0166464727f),
+     SC_H(0.0247849822f), SC_H(0.0290434249f), SC_H(0.0315911621f),
+     SC_H(0.0260186475f), SC_H(0.0046027377f)},
+    {SC_H(0.0000000000f), SC_H(0.0061091576f), SC_H(0.0094724894f),
+     SC_H(0.0140600465f), SC_H(0.0164251942f), SC_H(0.0177771524f),
+     SC_H(0.0145191504f), SC_H(0.0025530567f)},
+    {SC_H(0.0000000000f), SC_H(0.0034606743f), SC_H(0.0053620976f),
+     SC_H(0.0079446994f), SC_H(0.0092647672f), SC_H(0.0099990256f),
+     SC_H(0.0081285043f), SC_H(0.0014247177f)},
+    {SC_H(0.0000000000f), SC_H(0.0019540912f), SC_H(0.0030265225f),
+     SC_H(0.0044795908f), SC_H(0.0052186381f), SC_H(0.0056232223f),
+     SC_H(0.0045594289f), SC_H(0.0007977359f)},
+    {SC_H(0.0000000000f), SC_H(0.0000000149f), SC_H(0.0000000298f),
+     SC_H(0.0000000298f), SC_H(0.0000000000f), SC_H(0.0000000596f),
+     SC_H(0.0000000000f), SC_H(0.0000000000f)}};
+
+/*
+  for (i=0; i<31; i++) {
+    cld = dequantCLD[i];
+    val = (float)(FDKexp(cld/dbe)/(1+FDKexp(cld/dbe)));
+    val = (float)(dbe*FDKlog(val));
+  }
+*/
+#define SCALE_CLD_C1C2(a) (FL2FXCONST_DBL(a / (float)(1 << SF_CLD_C1C2)))
+const FIXP_DBL dequantCLD_c1[31] = {SCALE_CLD_C1C2(-1.5000000000000000e+002f),
+                                    SCALE_CLD_C1C2(-4.5000137329101563e+001f),
+                                    SCALE_CLD_C1C2(-4.0000434875488281e+001f),
+                                    SCALE_CLD_C1C2(-3.5001373291015625e+001f),
+                                    SCALE_CLD_C1C2(-3.0004341125488281e+001f),
+                                    SCALE_CLD_C1C2(-2.5013711929321289e+001f),
+                                    SCALE_CLD_C1C2(-2.2027315139770508e+001f),
+                                    SCALE_CLD_C1C2(-1.9054332733154297e+001f),
+                                    SCALE_CLD_C1C2(-1.6107742309570313e+001f),
+                                    SCALE_CLD_C1C2(-1.3212384223937988e+001f),
+                                    SCALE_CLD_C1C2(-1.0413927078247070e+001f),
+                                    SCALE_CLD_C1C2(-8.6389207839965820e+000f),
+                                    SCALE_CLD_C1C2(-6.9732279777526855e+000f),
+                                    SCALE_CLD_C1C2(-5.4554042816162109e+000f),
+                                    SCALE_CLD_C1C2(-4.1244258880615234e+000f),
+                                    SCALE_CLD_C1C2(-3.0102999210357666e+000f),
+                                    SCALE_CLD_C1C2(-2.1244258880615234e+000f),
+                                    SCALE_CLD_C1C2(-1.4554045200347900e+000f),
+                                    SCALE_CLD_C1C2(-9.7322785854339600e-001f),
+                                    SCALE_CLD_C1C2(-6.3892036676406860e-001f),
+                                    SCALE_CLD_C1C2(-4.1392669081687927e-001f),
+                                    SCALE_CLD_C1C2(-2.1238386631011963e-001f),
+                                    SCALE_CLD_C1C2(-1.0774217545986176e-001f),
+                                    SCALE_CLD_C1C2(-5.4333221167325974e-002f),
+                                    SCALE_CLD_C1C2(-2.7315950021147728e-002f),
+                                    SCALE_CLD_C1C2(-1.3711934909224510e-002f),
+                                    SCALE_CLD_C1C2(-4.3406565673649311e-003f),
+                                    SCALE_CLD_C1C2(-1.3732088264077902e-003f),
+                                    SCALE_CLD_C1C2(-4.3438826105557382e-004f),
+                                    SCALE_CLD_C1C2(-1.3745666365139186e-004f),
+                                    SCALE_CLD_C1C2(0.0000000000000000e+000f)};
+
+/* sac_stp */
+/* none scaled */
+const FIXP_CFG BP__FDK[] = {FL2FXCONST_CFG(0.73919999599457),
+                            FL2FXCONST_CFG(0.97909998893738),
+                            FL2FXCONST_CFG(0.99930000305176)};
+
+/* scaled with 26 bits */
+const FIXP_CFG BP_GF__FDK[] = {
+    FL2FXCONST_CFG(0.00000000643330), FL2FXCONST_CFG(0.00004396850232),
+    FL2FXCONST_CFG(0.00087456948552), FL2FXCONST_CFG(0.00474648220243),
+    FL2FXCONST_CFG(0.01717987244800), FL2FXCONST_CFG(0.04906742491073),
+    FL2FXCONST_CFG(0.10569518656729), FL2FXCONST_CFG(0.21165767592653),
+    FL2FXCONST_CFG(0.36036762478024), FL2FXCONST_CFG(0.59894182766948),
+    FL2FXCONST_CFG(0.81641678929129), FL2FXCONST_CFG(0.97418481133397),
+    FL2FXCONST_CFG(0.99575411610845), FL2FXCONST_CFG(0.88842666281361),
+    FL2FXCONST_CFG(0.79222317063736), FL2FXCONST_CFG(0.70828604318604),
+    FL2FXCONST_CFG(0.66395054816338), FL2FXCONST_CFG(0.64633739516952),
+    FL2FXCONST_CFG(0.66098278185255)};
+
+/* sac_bitdec */
+const INT samplingFreqTable[16] = {96000, 88200, 64000, 48000, 44100, 32000,
+                                   24000, 22050, 16000, 12000, 11025, 8000,
+                                   7350,  0,     0,     0};
+
+const UCHAR freqResTable[] = {0, 28, 20, 14, 10, 7, 5, 4};
+
+const UCHAR freqResTable_LD[] = {0, 23, 15, 12, 9, 7, 5, 4};
+
+const UCHAR tempShapeChanTable[][8] = {{5, 5, 4, 6, 6, 4, 4, 2},
+                                       {5, 5, 5, 7, 7, 4, 4, 2}};
+
+const TREEPROPERTIES treePropertyTable[] = {
+    {1, 6, 5, 0, {0, 0, 0, 0, 1}}, {1, 6, 5, 0, {0, 0, 1, 0, 0}},
+    {2, 6, 3, 1, {1, 0, 0, 0, 0}}, {2, 8, 5, 1, {1, 0, 0, 0, 0}},
+    {2, 8, 5, 1, {1, 0, 0, 0, 0}}, {6, 8, 2, 0, {0, 0, 0, 0, 0}},
+    {6, 8, 2, 0, {0, 0, 0, 0, 0}}, {1, 2, 1, 0, {0, 0, 0, 0, 0}}};
+
+const SCHAR kernels_4_to_71[MAX_HYBRID_BANDS] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3};
+
+const SCHAR kernels_5_to_71[MAX_HYBRID_BANDS] = {
+    0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4};
+
+const SCHAR kernels_7_to_71[MAX_HYBRID_BANDS] = {
+    0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5,
+    5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6};
+
+const SCHAR kernels_10_to_71[MAX_HYBRID_BANDS] = {
+    0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 7, 7, 7, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9};
+
+const SCHAR kernels_14_to_71[MAX_HYBRID_BANDS] = {
+    0,  0,  0,  0,  1,  1,  2,  3,  4,  4,  5,  6,  6,  7,  7,  8,  8,
+    8,  9,  9,  9,  10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12,
+    12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13};
+
+const SCHAR kernels_20_to_71[MAX_HYBRID_BANDS] = {
+    0,  0,  1,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14,
+    14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18,
+    18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19};
+
+const SCHAR kernels_28_to_71[MAX_HYBRID_BANDS] = {
+    0,  0,  1,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14,
+    15, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 23,
+    23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 26, 26, 26,
+    26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+    27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+    27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+    27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+    27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27};
+
+const SCHAR kernels_4_to_64[MAX_HYBRID_BANDS] = {
+    0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3};
+
+const SCHAR kernels_5_to_64[MAX_HYBRID_BANDS] = {
+    0, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4};
+
+const SCHAR kernels_7_to_64[MAX_HYBRID_BANDS] = {
+    0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
+    5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6};
+
+const SCHAR kernels_9_to_64[MAX_HYBRID_BANDS] = {
+    0, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7,
+    7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8};
+
+const SCHAR kernels_12_to_64[MAX_HYBRID_BANDS] = {
+    0,  1,  2,  3,  4,  4,  5,  5,  6,  6,  6,  7,  7,  7,  8,  8,  8,  8,  9,
+    9,  9,  9,  9,  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11,
+    11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+    11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+    11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+    11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+    11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11};
+
+const SCHAR kernels_15_to_64[MAX_HYBRID_BANDS] = {
+    0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  9,  10, 10, 10, 11, 11, 11, 11, 12,
+    12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14,
+    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14};
+
+const SCHAR kernels_23_to_64[MAX_HYBRID_BANDS] = {
+    0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 12, 13, 13, 14, 14, 15,
+    15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, 20,
+    20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22};
+
+const UCHAR mapping_15_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  9, 10,
+    10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 14};
+
+const UCHAR mapping_12_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, 11, 11, 11};
+
+const UCHAR mapping_9_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8};
+
+const UCHAR mapping_7_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6};
+
+const UCHAR mapping_5_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4};
+
+const UCHAR mapping_4_to_23[MAX_PARAMETER_BANDS_LD] = {
+    0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3};
+
+const FIXP_CFG clipGainTable__FDK[] = {
+    /*CLIP_PROTECT_GAIN_0(1.000000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL),
+    CLIP_PROTECT_GAIN_1(1.189207f),
+    CLIP_PROTECT_GAIN_1(1.414213f),
+    CLIP_PROTECT_GAIN_1(1.681792f),
+    /*CLIP_PROTECT_GAIN_1(2.000000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL),
+    CLIP_PROTECT_GAIN_2(2.378414f),
+    CLIP_PROTECT_GAIN_2(2.828427f),
+    /*CLIP_PROTECT_GAIN_2(4.000000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL)};
+
+const UCHAR clipGainSFTable__FDK[] = {0, 1, 1, 1, 1, 2, 2, 2};
+
+const UCHAR pbStrideTable[] = {1, 2, 5, 28};
+
+const int smgTimeTable[] = {64, 128, 256, 512};
+
+/* table is scaled by factor 0.5 */
+const FIXP_CFG envShapeDataTable__FDK[5][2] = {
+    {FL2FXCONST_CFG(0.25000000000000f), FL2FXCONST_CFG(0.25000000000000f)},
+    {FL2FXCONST_CFG(0.35355339059327f), FL2FXCONST_CFG(0.31498026247372f)},
+    {FL2FXCONST_CFG(0.50000000000000f), FL2FXCONST_CFG(0.39685026299205f)},
+    {FL2FXCONST_CFG(0.70710678118655f), FL2FXCONST_CFG(0.50000000000000f)},
+    {/*FL2FXCONST_CFG( 1.00000000000000f)*/ FX_DBL2FX_CFG(MAXVAL_DBL),
+     FL2FXCONST_CFG(0.62996052494744f)}};
+
+/* sac_calcM1andM2 */
+const SCHAR row2channelSTP[][MAX_M2_INPUT] = {{0, 1}, {0, 3}, {0, 2},  {0, 4},
+                                              {0, 4}, {0, 2}, {-1, 2}, {0, 1}};
+
+const SCHAR row2channelGES[][MAX_M2_INPUT] = {{0, 1}, {0, 3}, {0, 3},  {0, 5},
+                                              {0, 5}, {0, 2}, {-1, 2}, {0, 1}};
+
+const SCHAR row2residual[][MAX_M2_INPUT] = {{-1, 0},  {-1, 0},  {-1, -1},
+                                            {-1, -1}, {-1, -1}, {-1, -1},
+                                            {-1, -1}, {-1, 0}};
+
+/*******************************************************************************
+ Functionname: sac_getCLDValues
+ *******************************************************************************
+
+ Description: Get CLD values from table index.
+
+ Arguments:
+   index: Table index
+   *cu, *cl : Pointer to locations where resulting values will be written to.
+
+ Return: nothing
+
+*******************************************************************************/
+void SpatialDequantGetCLDValues(int index, FIXP_DBL* cu, FIXP_DBL* cl) {
+  *cu = FX_CFG2FX_DBL(dequantCLD_c_l[index]);
+  *cl = FX_CFG2FX_DBL(dequantCLD_c_l[31 - 1 - index]);
+}
+
+void SpatialDequantGetCLD2Values(int idx, FIXP_DBL* x) {
+  *x = FX_CFG2FX_DBL(dequantCLD__FDK[idx]);
+}
diff --git a/fdk-aac/libSACdec/src/sac_rom.h b/fdk-aac/libSACdec/src/sac_rom.h
new file mode 100644
index 0000000..d366fb6
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_rom.h
@@ -0,0 +1,230 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec tables
+
+*******************************************************************************/
+
+#ifndef SAC_ROM_H
+#define SAC_ROM_H
+
+#include "FDK_archdef.h"
+#include "sac_dec_interface.h"
+
+#include "huff_nodes.h"
+#include "sac_bitdec.h"
+#include "machine_type.h"
+
+/* Global ROM table data type: */
+#ifndef ARCH_PREFER_MULT_32x32
+#define FIXP_CFG FIXP_SGL
+#define FX_CFG2FX_DBL FX_SGL2FX_DBL
+#define FX_CFG2FX_SGL
+#define CFG(a) (FX_DBL2FXCONST_SGL(a))
+#define FL2FXCONST_CFG FL2FXCONST_SGL
+#define FX_DBL2FX_CFG(x) FX_DBL2FX_SGL((FIXP_DBL)(x))
+#else
+#define FIXP_CFG FIXP_DBL
+#define FX_CFG2FX_DBL
+#define FX_CFG2FX_SGL FX_DBL2FX_SGL
+#define CFG(a) FIXP_DBL(a)
+#define FL2FXCONST_CFG FL2FXCONST_DBL
+#define FX_DBL2FX_CFG(x) ((FIXP_DBL)(x))
+#endif
+
+/* others  */
+#define SCALE_INV_ICC (2)
+#define G_dd_SCALE (2)
+
+#define QCC_SCALE 1
+#define M1M2_DATA FIXP_DBL
+#ifndef ARCH_PREFER_MULT_32x32
+#define M1M2_CDATA FIXP_SGL
+#define M1M2_CDATA2FX_DBL(a) FX_SGL2FX_DBL(a)
+#define FX_DBL2M1M2_CDATA(a) FX_DBL2FX_SGL(a)
+#else
+#define M1M2_CDATA FIXP_DBL
+#define M1M2_CDATA2FX_DBL(a) (a)
+#define FX_DBL2M1M2_CDATA(a) (a)
+#endif
+
+#define CLIP_PROTECT_GAIN_0(x) FL2FXCONST_CFG(((x) / (float)(1 << 0)))
+#define CLIP_PROTECT_GAIN_1(x) FL2FXCONST_CFG(((x) / (float)(1 << 1)))
+#define CLIP_PROTECT_GAIN_2(x) FL2FXCONST_CFG(((x) / (float)(1 << 2)))
+
+#define SF_CLD_C1C2 (8)
+
+extern const FIXP_CFG dequantCPC__FDK[];
+extern const FIXP_CFG dequantICC__FDK[8];
+extern const FIXP_CFG dequantCLD__FDK[31];
+
+#define IPD_SCALE (5)
+#define PI__IPD (FL2FXCONST_DBL(3.1415926535897932f / (float)(1 << IPD_SCALE)))
+/* Define for PI*2 for better precision in  SpatialDecApplyPhase() */
+#define PIx2__IPD \
+  (FL2FXCONST_DBL(3.1415926535897932f / (float)(1 << (IPD_SCALE - 1))))
+
+extern const FIXP_CFG dequantIPD__FDK[16];
+
+extern const FIXP_CFG H11_nc[31][8];
+extern const FIXP_CFG H12_nc[31][8];
+
+extern const FIXP_DBL dequantCLD_c1[31];
+
+extern const FIXP_CFG BP__FDK[];
+extern const FIXP_CFG BP_GF__FDK[];
+extern const SCHAR row2channelSTP[][MAX_M2_INPUT];
+
+/* sac_bitdec */
+extern const INT samplingFreqTable[16];
+extern const UCHAR freqResTable[];
+extern const UCHAR freqResTable_LD[];
+extern const UCHAR tempShapeChanTable[2][8];
+extern const TREEPROPERTIES treePropertyTable[];
+
+extern const SCHAR kernels_4_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_5_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_7_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_10_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_14_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_20_to_71[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_28_to_71[MAX_HYBRID_BANDS];
+
+extern const UCHAR mapping_4_to_28[MAX_PARAMETER_BANDS];
+extern const UCHAR mapping_5_to_28[MAX_PARAMETER_BANDS];
+extern const UCHAR mapping_7_to_28[MAX_PARAMETER_BANDS];
+extern const UCHAR mapping_10_to_28[MAX_PARAMETER_BANDS];
+extern const UCHAR mapping_14_to_28[MAX_PARAMETER_BANDS];
+extern const UCHAR mapping_20_to_28[MAX_PARAMETER_BANDS];
+extern const SCHAR kernels_4_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_5_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_7_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_9_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_12_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_15_to_64[MAX_HYBRID_BANDS];
+extern const SCHAR kernels_23_to_64[MAX_HYBRID_BANDS];
+
+extern const UCHAR mapping_15_to_23[MAX_PARAMETER_BANDS_LD];
+extern const UCHAR mapping_12_to_23[MAX_PARAMETER_BANDS_LD];
+extern const UCHAR mapping_9_to_23[MAX_PARAMETER_BANDS_LD];
+extern const UCHAR mapping_7_to_23[MAX_PARAMETER_BANDS_LD];
+extern const UCHAR mapping_5_to_23[MAX_PARAMETER_BANDS_LD];
+extern const UCHAR mapping_4_to_23[MAX_PARAMETER_BANDS_LD];
+
+extern const FIXP_CFG clipGainTable__FDK[];
+extern const UCHAR clipGainSFTable__FDK[];
+
+extern const UCHAR pbStrideTable[];
+extern const int smgTimeTable[];
+
+extern const FIXP_CFG envShapeDataTable__FDK[5][2];
+extern const SCHAR row2channelGES[][MAX_M2_INPUT];
+
+/* sac_calcM1andM2 */
+extern const SCHAR row2residual[][MAX_M2_INPUT];
+
+void SpatialDequantGetCLDValues(int index, FIXP_DBL* cu, FIXP_DBL* cl);
+
+void SpatialDequantGetCLD2Values(int index, FIXP_DBL* x);
+
+/* External helper functions */
+static inline int SacGetHybridSubbands(int qmfSubbands) {
+  return qmfSubbands - MAX_QMF_BANDS_TO_HYBRID + 10;
+}
+
+#endif /* SAC_ROM_H */
diff --git a/fdk-aac/libSACdec/src/sac_smoothing.cpp b/fdk-aac/libSACdec/src/sac_smoothing.cpp
new file mode 100644
index 0000000..bee6551
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_smoothing.cpp
@@ -0,0 +1,295 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec parameter smoothing
+
+*******************************************************************************/
+
+#include "sac_dec.h"
+#include "sac_bitdec.h"
+#include "sac_smoothing.h"
+#include "sac_rom.h"
+
+/*******************************************************************************
+ Functionname: calcFilterCoeff
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+
+ Output:
+
+
+*******************************************************************************/
+static FIXP_DBL calcFilterCoeff__FDK(spatialDec *self, int ps,
+                                     const SPATIAL_BS_FRAME *frame) {
+  int dSlots;
+  FIXP_DBL delta;
+
+  dSlots = frame->paramSlot[ps] - self->smoothState->prevParamSlot;
+
+  if (dSlots <= 0) {
+    dSlots += self->timeSlots;
+  }
+
+  delta = fDivNorm(dSlots, self->smgTime[ps]);
+
+  return delta;
+}
+
+/*******************************************************************************
+ Functionname: getSmoothOnOff
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Input:
+
+ Output:
+
+
+*******************************************************************************/
+static int getSmoothOnOff(spatialDec *self, int ps, int pb) {
+  int smoothBand = 0;
+
+  smoothBand = self->smgData[ps][pb];
+
+  return smoothBand;
+}
+
+void SpatialDecSmoothM1andM2(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                             int ps) {
+  FIXP_DBL delta__FDK;
+  FIXP_DBL one_minus_delta__FDK;
+
+  int pb, row, col;
+  int residualBands = 0;
+
+  if (self->residualCoding) {
+    int i;
+    int boxes = self->numOttBoxes;
+    for (i = 0; i < boxes; i++) {
+      if (self->residualBands[i] > residualBands) {
+        residualBands = self->residualBands[i];
+      }
+    }
+  }
+
+  delta__FDK = calcFilterCoeff__FDK(self, ps, frame);
+  if (delta__FDK == /*FL2FXCONST_DBL(1.0f)*/ (FIXP_DBL)MAXVAL_DBL)
+    one_minus_delta__FDK = FL2FXCONST_DBL(0.0f);
+  else if (delta__FDK == FL2FXCONST_DBL(0.0f))
+    one_minus_delta__FDK = /*FL2FXCONST_DBL(1.0f)*/ (FIXP_DBL)MAXVAL_DBL;
+  else
+    one_minus_delta__FDK = (FL2FXCONST_DBL(0.5f) - (delta__FDK >> 1)) << 1;
+
+  for (pb = 0; pb < self->numParameterBands; pb++) {
+    int smoothBand;
+
+    smoothBand = getSmoothOnOff(self, ps, pb);
+
+    if (smoothBand && (pb >= residualBands)) {
+      for (row = 0; row < self->numM2rows; row++) {
+        for (col = 0; col < self->numVChannels; col++) {
+          self->M2Real__FDK[row][col][pb] =
+              ((fMultDiv2(delta__FDK, self->M2Real__FDK[row][col][pb]) +
+                fMultDiv2(one_minus_delta__FDK,
+                          self->M2RealPrev__FDK[row][col][pb]))
+               << 1);
+          if (0 || (self->phaseCoding == 3)) {
+            self->M2Imag__FDK[row][col][pb] =
+                ((fMultDiv2(delta__FDK, self->M2Imag__FDK[row][col][pb]) +
+                  fMultDiv2(one_minus_delta__FDK,
+                            self->M2ImagPrev__FDK[row][col][pb]))
+                 << 1);
+          }
+        }
+      }
+    }
+  }
+  self->smoothState->prevParamSlot = frame->paramSlot[ps];
+}
+
+/* init states */
+void initParameterSmoothing(spatialDec *self) {
+  self->smoothState->prevParamSlot = 0;
+}
+
+void SpatialDecSmoothOPD(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                         int ps) {
+  int pb;
+  int dSlots;
+  FIXP_DBL delta__FDK;
+  FIXP_DBL one_minus_delta__FDK;
+  FIXP_DBL *phaseLeftSmooth__FDK = self->smoothState->opdLeftState__FDK;
+  FIXP_DBL *phaseRightSmooth__FDK = self->smoothState->opdRightState__FDK;
+  int quantCoarse;
+
+  quantCoarse = frame->IPDLosslessData[0].bsQuantCoarseXXX[ps];
+
+  if (frame->OpdSmoothingMode == 0) {
+    FDKmemcpy(phaseLeftSmooth__FDK, self->PhaseLeft__FDK,
+              self->numParameterBands * sizeof(FIXP_DBL));
+    FDKmemcpy(phaseRightSmooth__FDK, self->PhaseRight__FDK,
+              self->numParameterBands * sizeof(FIXP_DBL));
+  } else {
+    if (ps == 0) {
+      dSlots = frame->paramSlot[ps] + 1;
+    } else {
+      dSlots = frame->paramSlot[ps] - frame->paramSlot[ps - 1];
+    }
+
+    delta__FDK = (FIXP_DBL)((INT)(FL2FXCONST_DBL(0.0078125f)) * dSlots);
+
+    if (delta__FDK == (FIXP_DBL)MAXVAL_DBL /*FL2FXCONST_DBL(1.0f)*/)
+      one_minus_delta__FDK = FL2FXCONST_DBL(0.0f);
+    else if (delta__FDK == FL2FXCONST_DBL(0.0f))
+      one_minus_delta__FDK = (FIXP_DBL)MAXVAL_DBL /*FL2FXCONST_DBL(1.0f)*/;
+    else
+      one_minus_delta__FDK = (FL2FXCONST_DBL(0.5f) - (delta__FDK >> 1)) << 1;
+
+    for (pb = 0; pb < self->numParameterBands; pb++) {
+      FIXP_DBL tmpL, tmpR, tmp;
+
+      tmpL = self->PhaseLeft__FDK[pb];
+      tmpR = self->PhaseRight__FDK[pb];
+
+      while (tmpL > phaseLeftSmooth__FDK[pb] + PI__IPD) tmpL -= PI__IPD << 1;
+      while (tmpL < phaseLeftSmooth__FDK[pb] - PI__IPD) tmpL += PI__IPD << 1;
+      while (tmpR > phaseRightSmooth__FDK[pb] + PI__IPD) tmpR -= PI__IPD << 1;
+      while (tmpR < phaseRightSmooth__FDK[pb] - PI__IPD) tmpR += PI__IPD << 1;
+
+      phaseLeftSmooth__FDK[pb] =
+          fMult(delta__FDK, tmpL) +
+          fMult(one_minus_delta__FDK, phaseLeftSmooth__FDK[pb]);
+      phaseRightSmooth__FDK[pb] =
+          fMult(delta__FDK, tmpR) +
+          fMult(one_minus_delta__FDK, phaseRightSmooth__FDK[pb]);
+
+      tmp = (((tmpL >> 1) - (tmpR >> 1)) - ((phaseLeftSmooth__FDK[pb] >> 1) -
+                                            (phaseRightSmooth__FDK[pb] >> 1)))
+            << 1;
+      while (tmp > PI__IPD) tmp -= PI__IPD << 1;
+      while (tmp < -PI__IPD) tmp += PI__IPD << 1;
+      if (fixp_abs(tmp) > fMult((quantCoarse ? FL2FXCONST_DBL(50.f / 180.f)
+                                             : FL2FXCONST_DBL(25.f / 180.f)),
+                                PI__IPD)) {
+        phaseLeftSmooth__FDK[pb] = tmpL;
+        phaseRightSmooth__FDK[pb] = tmpR;
+      }
+
+      while (phaseLeftSmooth__FDK[pb] > PI__IPD << 1)
+        phaseLeftSmooth__FDK[pb] -= PI__IPD << 1;
+      while (phaseLeftSmooth__FDK[pb] < (FIXP_DBL)0)
+        phaseLeftSmooth__FDK[pb] += PI__IPD << 1;
+      while (phaseRightSmooth__FDK[pb] > PI__IPD << 1)
+        phaseRightSmooth__FDK[pb] -= PI__IPD << 1;
+      while (phaseRightSmooth__FDK[pb] < (FIXP_DBL)0)
+        phaseRightSmooth__FDK[pb] += PI__IPD << 1;
+
+      self->PhaseLeft__FDK[pb] = phaseLeftSmooth__FDK[pb];
+      self->PhaseRight__FDK[pb] = phaseRightSmooth__FDK[pb];
+    }
+  }
+  return;
+}
diff --git a/fdk-aac/libSACdec/src/sac_smoothing.h b/fdk-aac/libSACdec/src/sac_smoothing.h
new file mode 100644
index 0000000..fdf3f5b
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_smoothing.h
@@ -0,0 +1,114 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec parameter smoothing
+
+*******************************************************************************/
+
+#ifndef SAC_SMOOTHING_H
+#define SAC_SMOOTHING_H
+
+#include "sac_dec.h"
+
+void initParameterSmoothing(spatialDec *self);
+void SpatialDecSmoothM1andM2(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                             int ps);
+void SpatialDecSmoothOPD(spatialDec *self, const SPATIAL_BS_FRAME *frame,
+                         int ps);
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_stp.cpp b/fdk-aac/libSACdec/src/sac_stp.cpp
new file mode 100644
index 0000000..818e9df
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_stp.cpp
@@ -0,0 +1,548 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec subband processing
+
+*******************************************************************************/
+
+#include "sac_stp.h"
+#include "sac_calcM1andM2.h"
+#include "sac_bitdec.h"
+#include "FDK_matrixCalloc.h"
+#include "sac_rom.h"
+
+#define BP_GF_START 6
+#define BP_GF_SIZE 25
+#define HP_SIZE 9
+#define STP_UPDATE_ENERGY_RATE 32
+
+#define SF_WET 5
+#define SF_DRY \
+  3 /* SF_DRY == 2 would produce good conformance test results as well */
+#define SF_PRODUCT_BP_GF 13
+#define SF_PRODUCT_BP_GF_GF 26
+#define SF_SCALE 2
+
+#define SF_SCALE_LD64 FL2FXCONST_DBL(0.03125)      /* LD64((1<<SF_SCALE))*/
+#define STP_LPF_COEFF1__FDK FL2FXCONST_DBL(0.950f) /* 0.95 */
+#define ONE_MINUS_STP_LPF_COEFF1__FDK FL2FXCONST_DBL(0.05f) /* 1.0 - 0.95 */
+#define STP_LPF_COEFF2__FDK FL2FXCONST_DBL(0.450f)          /* 0.45 */
+#define ONE_MINUS_STP_LPF_COEFF2__FDK \
+  FL2FXCONST_DBL(1.0f - 0.450f) /* 1.0 - 0.45 */
+#define STP_SCALE_LIMIT__FDK \
+  FL2FXCONST_DBL(2.82f / (float)(1 << SF_SCALE)) /* scaled by SF_SCALE */
+#define ONE_DIV_STP_SCALE_LIMIT__FDK                                          \
+  FL2FXCONST_DBL(1.0f / 2.82f / (float)(1 << SF_SCALE)) /* scaled by SF_SCALE \
+                                                         */
+#define ABS_THR__FDK       \
+  FL2FXCONST_DBL(ABS_THR / \
+                 ((float)(1 << (22 + 22 - 26)))) /* scaled by 18 bits */
+#define ABS_THR2__FDK                      \
+  FL2FXCONST_DBL(ABS_THR * 32.0f * 32.0f / \
+                 ((float)(1 << (22 + 22 - 26)))) /* scaled by 10 bits */
+#define STP_SCALE_LIMIT_HI \
+  FL2FXCONST_DBL(3.02222222222 / (1 << SF_SCALE)) /* see 4. below */
+#define STP_SCALE_LIMIT_LO \
+  FL2FXCONST_DBL(0.28289992119 / (1 << SF_SCALE)) /* see 4. below */
+#define STP_SCALE_LIMIT_HI_LD64                 \
+  FL2FXCONST_DBL(0.04986280452) /* see 4. below \
+                                 */
+#define STP_SCALE_LIMIT_LO_LD64                 \
+  FL2FXCONST_DBL(0.05692613500) /* see 4. below \
+                                 */
+
+/*  Scale factor calculation for the diffuse signal needs adapted thresholds
+    for STP_SCALE_LIMIT and 1/STP_SCALE_LIMIT:
+
+    1. scale = sqrt(DryNrg/WetNrg)
+
+    2. Damping of scale factor
+       scale2 = 0.1 + 0.9 * scale
+
+    3. Limiting of scale factor
+          STP_SCALE_LIMIT           >=        scale2        >= 1/STP_SCALE_LIMIT
+       => STP_SCALE_LIMIT           >=  (0.1 + 0.9 * scale) >= 1/STP_SCALE_LIMIT
+       => (STP_SCALE_LIMIT-0.1)/0.9 >=        scale         >=
+   (1/STP_SCALE_LIMIT-0.1)/0.9
+
+    3. Limiting of scale factor before sqrt calculation
+       ((STP_SCALE_LIMIT-0.1)/0.9)^2 >= (scale^2) >=
+   ((1/STP_SCALE_LIMIT-0.1)/0.9)^2 (STP_SCALE_LIMIT_HI)^2        >= (scale^2) >=
+   (STP_SCALE_LIMIT_LO)^2
+
+    4. Thresholds for limiting of scale factor
+       STP_SCALE_LIMIT_HI      = ((2.82-0.1)/0.9)
+       STP_SCALE_LIMIT_LO      = (((1.0/2.82)-0.1)/0.9)
+       STP_SCALE_LIMIT_HI_LD64 = LD64(STP_SCALE_LIMIT_HI*STP_SCALE_LIMIT_HI)
+       STP_SCALE_LIMIT_LO_LD64 = LD64(STP_SCALE_LIMIT_LO*STP_SCALE_LIMIT_LO)
+*/
+
+#define DRY_ENER_WEIGHT(DryEner) DryEner = DryEner >> dry_scale_dmx
+
+#define WET_ENER_WEIGHT(WetEner) WetEner = WetEner << wet_scale_dmx
+
+#define DRY_ENER_SUM_REAL(DryEner, dmxReal, n) \
+  DryEner +=                                   \
+      fMultDiv2(fPow2Div2(dmxReal << SF_DRY), pBP[n]) >> ((2 * SF_DRY) - 2)
+
+#define DRY_ENER_SUM_CPLX(DryEner, dmxReal, dmxImag, n) \
+  DryEner += fMultDiv2(                                 \
+      fPow2Div2(dmxReal << SF_DRY) + fPow2Div2(dmxImag << SF_DRY), pBP[n])
+
+#define CALC_WET_SCALE(dryIdx, wetIdx)                                         \
+  if ((DryEnerLD64[dryIdx] - STP_SCALE_LIMIT_HI_LD64) > WetEnerLD64[wetIdx]) { \
+    scale[wetIdx] = STP_SCALE_LIMIT_HI;                                        \
+  } else if (DryEnerLD64[dryIdx] <                                             \
+             (WetEnerLD64[wetIdx] - STP_SCALE_LIMIT_LO_LD64)) {                \
+    scale[wetIdx] = STP_SCALE_LIMIT_LO;                                        \
+  } else {                                                                     \
+    tmp = ((DryEnerLD64[dryIdx] - WetEnerLD64[wetIdx]) >> 1) - SF_SCALE_LD64;  \
+    scale[wetIdx] = CalcInvLdData(tmp);                                        \
+  }
+
+struct STP_DEC {
+  FIXP_DBL runDryEner[MAX_INPUT_CHANNELS];
+  FIXP_DBL runWetEner[MAX_OUTPUT_CHANNELS];
+  FIXP_DBL oldDryEnerLD64[MAX_INPUT_CHANNELS];
+  FIXP_DBL oldWetEnerLD64[MAX_OUTPUT_CHANNELS];
+  FIXP_DBL prev_tp_scale[MAX_OUTPUT_CHANNELS];
+  const FIXP_CFG *BP;
+  const FIXP_CFG *BP_GF;
+  int update_old_ener;
+};
+
+inline void combineSignalReal(FIXP_DBL *hybOutputRealDry,
+                              FIXP_DBL *hybOutputRealWet, int bands) {
+  int n;
+
+  for (n = bands - 1; n >= 0; n--) {
+    *hybOutputRealDry = *hybOutputRealDry + *hybOutputRealWet;
+    hybOutputRealDry++, hybOutputRealWet++;
+  }
+}
+
+inline void combineSignalRealScale1(FIXP_DBL *hybOutputRealDry,
+                                    FIXP_DBL *hybOutputRealWet, FIXP_DBL scaleX,
+                                    int bands) {
+  int n;
+
+  for (n = bands - 1; n >= 0; n--) {
+    *hybOutputRealDry =
+        *hybOutputRealDry +
+        (fMultDiv2(*hybOutputRealWet, scaleX) << (SF_SCALE + 1));
+    hybOutputRealDry++, hybOutputRealWet++;
+  }
+}
+
+inline void combineSignalCplx(FIXP_DBL *hybOutputRealDry,
+                              FIXP_DBL *hybOutputImagDry,
+                              FIXP_DBL *hybOutputRealWet,
+                              FIXP_DBL *hybOutputImagWet, int bands) {
+  int n;
+
+  for (n = bands - 1; n >= 0; n--) {
+    *hybOutputRealDry = *hybOutputRealDry + *hybOutputRealWet;
+    *hybOutputImagDry = *hybOutputImagDry + *hybOutputImagWet;
+    hybOutputRealDry++, hybOutputRealWet++;
+    hybOutputImagDry++, hybOutputImagWet++;
+  }
+}
+
+inline void combineSignalCplxScale1(FIXP_DBL *hybOutputRealDry,
+                                    FIXP_DBL *hybOutputImagDry,
+                                    FIXP_DBL *hybOutputRealWet,
+                                    FIXP_DBL *hybOutputImagWet,
+                                    const FIXP_CFG *pBP, FIXP_DBL scaleX,
+                                    int bands) {
+  int n;
+  FIXP_DBL scaleY;
+  for (n = bands - 1; n >= 0; n--) {
+    scaleY = fMultDiv2(scaleX, *pBP);
+    *hybOutputRealDry =
+        *hybOutputRealDry +
+        (fMultDiv2(*hybOutputRealWet, scaleY) << (SF_SCALE + 2));
+    *hybOutputImagDry =
+        *hybOutputImagDry +
+        (fMultDiv2(*hybOutputImagWet, scaleY) << (SF_SCALE + 2));
+    hybOutputRealDry++, hybOutputRealWet++;
+    hybOutputImagDry++, hybOutputImagWet++;
+    pBP++;
+  }
+}
+
+inline void combineSignalCplxScale2(FIXP_DBL *hybOutputRealDry,
+                                    FIXP_DBL *hybOutputImagDry,
+                                    FIXP_DBL *hybOutputRealWet,
+                                    FIXP_DBL *hybOutputImagWet, FIXP_DBL scaleX,
+                                    int bands) {
+  int n;
+
+  for (n = bands - 1; n >= 0; n--) {
+    *hybOutputRealDry =
+        *hybOutputRealDry +
+        (fMultDiv2(*hybOutputRealWet, scaleX) << (SF_SCALE + 1));
+    *hybOutputImagDry =
+        *hybOutputImagDry +
+        (fMultDiv2(*hybOutputImagWet, scaleX) << (SF_SCALE + 1));
+    hybOutputRealDry++, hybOutputRealWet++;
+    hybOutputImagDry++, hybOutputImagWet++;
+  }
+}
+
+/*******************************************************************************
+ Functionname: subbandTPCreate
+ ******************************************************************************/
+SACDEC_ERROR subbandTPCreate(HANDLE_STP_DEC *hStpDec) {
+  HANDLE_STP_DEC self = NULL;
+  FDK_ALLOCATE_MEMORY_1D(self, 1, struct STP_DEC)
+  if (hStpDec != NULL) {
+    *hStpDec = self;
+  }
+
+  return MPS_OK;
+bail:
+  return MPS_OUTOFMEMORY;
+}
+
+SACDEC_ERROR subbandTPInit(HANDLE_STP_DEC self) {
+  SACDEC_ERROR err = MPS_OK;
+  int ch;
+
+  for (ch = 0; ch < MAX_OUTPUT_CHANNELS; ch++) {
+    self->prev_tp_scale[ch] = FL2FXCONST_DBL(1.0f / (1 << SF_SCALE));
+    self->oldWetEnerLD64[ch] =
+        FL2FXCONST_DBL(0.34375f); /* 32768.0*32768.0/2^(44-26-10) */
+  }
+  for (ch = 0; ch < MAX_INPUT_CHANNELS; ch++) {
+    self->oldDryEnerLD64[ch] =
+        FL2FXCONST_DBL(0.1875f); /* 32768.0*32768.0/2^(44-26) */
+  }
+
+  self->BP = BP__FDK;
+  self->BP_GF = BP_GF__FDK;
+
+  self->update_old_ener = 0;
+
+  return err;
+}
+
+/*******************************************************************************
+ Functionname: subbandTPDestroy
+ ******************************************************************************/
+void subbandTPDestroy(HANDLE_STP_DEC *hStpDec) {
+  if (hStpDec != NULL) {
+    FDK_FREE_MEMORY_1D(*hStpDec);
+  }
+}
+
+/*******************************************************************************
+ Functionname: subbandTPApply
+ ******************************************************************************/
+SACDEC_ERROR subbandTPApply(spatialDec *self, const SPATIAL_BS_FRAME *frame) {
+  FIXP_DBL *qmfOutputRealDry[MAX_OUTPUT_CHANNELS];
+  FIXP_DBL *qmfOutputImagDry[MAX_OUTPUT_CHANNELS];
+  FIXP_DBL *qmfOutputRealWet[MAX_OUTPUT_CHANNELS];
+  FIXP_DBL *qmfOutputImagWet[MAX_OUTPUT_CHANNELS];
+
+  FIXP_DBL DryEner[MAX_INPUT_CHANNELS];
+  FIXP_DBL scale[MAX_OUTPUT_CHANNELS];
+
+  FIXP_DBL DryEnerLD64[MAX_INPUT_CHANNELS];
+  FIXP_DBL WetEnerLD64[MAX_OUTPUT_CHANNELS];
+
+  FIXP_DBL DryEner0 = FL2FXCONST_DBL(0.0f);
+  FIXP_DBL WetEnerX, damp, tmp;
+  FIXP_DBL dmxReal0, dmxImag0;
+  int skipChannels[MAX_OUTPUT_CHANNELS];
+  int n, ch, cplxBands, cplxHybBands;
+  int dry_scale_dmx, wet_scale_dmx;
+  int i_LF, i_RF;
+  HANDLE_STP_DEC hStpDec;
+  const FIXP_CFG *pBP;
+
+  int nrgScale = (2 * self->clipProtectGainSF__FDK);
+
+  hStpDec = self->hStpDec;
+
+  /* set scalefactor and loop counter */
+  FDK_ASSERT(SF_DRY >= 1);
+  {
+    cplxBands = BP_GF_SIZE;
+    cplxHybBands = self->hybridBands;
+    dry_scale_dmx = (2 * SF_DRY) - 2;
+    wet_scale_dmx = 2;
+  }
+
+  /* setup pointer for forming the direct downmix signal */
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    qmfOutputRealDry[ch] = &self->hybOutputRealDry__FDK[ch][7];
+    qmfOutputRealWet[ch] = &self->hybOutputRealWet__FDK[ch][7];
+    qmfOutputImagDry[ch] = &self->hybOutputImagDry__FDK[ch][7];
+    qmfOutputImagWet[ch] = &self->hybOutputImagWet__FDK[ch][7];
+  }
+
+  /* clear skipping flag for all output channels */
+  FDKmemset(skipChannels, 0, self->numOutputChannels * sizeof(int));
+
+  /* set scale values to zero */
+  FDKmemset(scale, 0, self->numOutputChannels * sizeof(FIXP_DBL));
+
+  /* update normalisation energy with latest smoothed energy */
+  if (hStpDec->update_old_ener == STP_UPDATE_ENERGY_RATE) {
+    hStpDec->update_old_ener = 1;
+    for (ch = 0; ch < self->numInputChannels; ch++) {
+      hStpDec->oldDryEnerLD64[ch] =
+          CalcLdData(hStpDec->runDryEner[ch] + ABS_THR__FDK);
+    }
+    for (ch = 0; ch < self->numOutputChannels; ch++) {
+      hStpDec->oldWetEnerLD64[ch] =
+          CalcLdData(hStpDec->runWetEner[ch] + ABS_THR2__FDK);
+    }
+  } else {
+    hStpDec->update_old_ener++;
+  }
+
+  /* get channel configuration */
+  switch (self->treeConfig) {
+    case TREE_212:
+      i_LF = 0;
+      i_RF = 1;
+      break;
+    default:
+      return MPS_WRONG_TREECONFIG;
+  }
+
+  /* form the 'direct' downmix signal */
+  pBP = hStpDec->BP_GF - BP_GF_START;
+  switch (self->treeConfig) {
+    case TREE_212:
+      for (n = BP_GF_START; n < cplxBands; n++) {
+        dmxReal0 = qmfOutputRealDry[i_LF][n] + qmfOutputRealDry[i_RF][n];
+        dmxImag0 = qmfOutputImagDry[i_LF][n] + qmfOutputImagDry[i_RF][n];
+        DRY_ENER_SUM_CPLX(DryEner0, dmxReal0, dmxImag0, n);
+      }
+      DRY_ENER_WEIGHT(DryEner0);
+      break;
+    default:;
+  }
+  DryEner[0] = DryEner0;
+
+  /* normalise the 'direct' signals */
+  for (ch = 0; ch < self->numInputChannels; ch++) {
+    DryEner[ch] = DryEner[ch] << (nrgScale);
+    hStpDec->runDryEner[ch] =
+        fMult(STP_LPF_COEFF1__FDK, hStpDec->runDryEner[ch]) +
+        fMult(ONE_MINUS_STP_LPF_COEFF1__FDK, DryEner[ch]);
+    if (DryEner[ch] != FL2FXCONST_DBL(0.0f)) {
+      DryEnerLD64[ch] =
+          fixMax((CalcLdData(DryEner[ch]) - hStpDec->oldDryEnerLD64[ch]),
+                 FL2FXCONST_DBL(-0.484375f));
+    } else {
+      DryEnerLD64[ch] = FL2FXCONST_DBL(-0.484375f);
+    }
+  }
+  if (self->treeConfig == TREE_212) {
+    for (; ch < MAX_INPUT_CHANNELS; ch++) {
+      DryEnerLD64[ch] = FL2FXCONST_DBL(-0.484375f);
+    }
+  }
+
+  /* normalise the 'diffuse' signals */
+  pBP = hStpDec->BP_GF - BP_GF_START;
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    if (skipChannels[ch]) {
+      continue;
+    }
+
+    WetEnerX = FL2FXCONST_DBL(0.0f);
+    for (n = BP_GF_START; n < cplxBands; n++) {
+      tmp = fPow2Div2(qmfOutputRealWet[ch][n] << SF_WET);
+      tmp += fPow2Div2(qmfOutputImagWet[ch][n] << SF_WET);
+      WetEnerX += fMultDiv2(tmp, pBP[n]);
+    }
+    WET_ENER_WEIGHT(WetEnerX);
+
+    WetEnerX = WetEnerX << (nrgScale);
+    hStpDec->runWetEner[ch] =
+        fMult(STP_LPF_COEFF1__FDK, hStpDec->runWetEner[ch]) +
+        fMult(ONE_MINUS_STP_LPF_COEFF1__FDK, WetEnerX);
+
+    if (WetEnerX == FL2FXCONST_DBL(0.0f)) {
+      WetEnerLD64[ch] = FL2FXCONST_DBL(-0.484375f);
+    } else {
+      WetEnerLD64[ch] =
+          fixMax((CalcLdData(WetEnerX) - hStpDec->oldWetEnerLD64[ch]),
+                 FL2FXCONST_DBL(-0.484375f));
+    }
+  }
+
+  /* compute scale factor for the 'diffuse' signals */
+  switch (self->treeConfig) {
+    case TREE_212:
+      if (DryEner[0] != FL2FXCONST_DBL(0.0f)) {
+        CALC_WET_SCALE(0, i_LF);
+        CALC_WET_SCALE(0, i_RF);
+      }
+      break;
+    default:;
+  }
+
+  damp = FL2FXCONST_DBL(0.1f / (1 << SF_SCALE));
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    /* damp the scaling factor */
+    scale[ch] = damp + fMult(FL2FXCONST_DBL(0.9f), scale[ch]);
+
+    /* limiting the scale factor */
+    if (scale[ch] > STP_SCALE_LIMIT__FDK) {
+      scale[ch] = STP_SCALE_LIMIT__FDK;
+    }
+    if (scale[ch] < ONE_DIV_STP_SCALE_LIMIT__FDK) {
+      scale[ch] = ONE_DIV_STP_SCALE_LIMIT__FDK;
+    }
+
+    /* low pass filter the scaling factor */
+    scale[ch] =
+        fMult(STP_LPF_COEFF2__FDK, scale[ch]) +
+        fMult(ONE_MINUS_STP_LPF_COEFF2__FDK, hStpDec->prev_tp_scale[ch]);
+    hStpDec->prev_tp_scale[ch] = scale[ch];
+  }
+
+  /* combine 'direct' and scaled 'diffuse' signal */
+  FDK_ASSERT((HP_SIZE - 3 + 10 - 1) == PC_NUM_HYB_BANDS);
+  const SCHAR *channlIndex = row2channelSTP[self->treeConfig];
+
+  for (ch = 0; ch < self->numOutputChannels; ch++) {
+    int no_scaling;
+
+    no_scaling = !frame->tempShapeEnableChannelSTP[channlIndex[ch]];
+    if (no_scaling) {
+      combineSignalCplx(
+          &self->hybOutputRealDry__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputImagDry__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputRealWet__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputImagWet__FDK[ch][self->tp_hybBandBorder],
+          cplxHybBands - self->tp_hybBandBorder);
+
+    } else {
+      FIXP_DBL scaleX;
+      scaleX = scale[ch];
+      pBP = hStpDec->BP - self->tp_hybBandBorder;
+      /* Band[HP_SIZE-3+10-1] needs not to be processed in
+         combineSignalCplxScale1(), because pB[HP_SIZE-3+10-1] would be 1.0 */
+      combineSignalCplxScale1(
+          &self->hybOutputRealDry__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputImagDry__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputRealWet__FDK[ch][self->tp_hybBandBorder],
+          &self->hybOutputImagWet__FDK[ch][self->tp_hybBandBorder],
+          &pBP[self->tp_hybBandBorder], scaleX,
+          (HP_SIZE - 3 + 10 - 1) - self->tp_hybBandBorder);
+
+      {
+        combineSignalCplxScale2(
+            &self->hybOutputRealDry__FDK[ch][HP_SIZE - 3 + 10 - 1],
+            &self->hybOutputImagDry__FDK[ch][HP_SIZE - 3 + 10 - 1],
+            &self->hybOutputRealWet__FDK[ch][HP_SIZE - 3 + 10 - 1],
+            &self->hybOutputImagWet__FDK[ch][HP_SIZE - 3 + 10 - 1], scaleX,
+            cplxHybBands - (HP_SIZE - 3 + 10 - 1));
+      }
+    }
+  }
+
+  return (SACDEC_ERROR)MPS_OK;
+  ;
+}
diff --git a/fdk-aac/libSACdec/src/sac_stp.h b/fdk-aac/libSACdec/src/sac_stp.h
new file mode 100644
index 0000000..18471bd
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_stp.h
@@ -0,0 +1,115 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):
+
+   Description: SAC Dec subband processing
+
+*******************************************************************************/
+
+#ifndef SAC_STP_H
+#define SAC_STP_H
+
+#include "sac_dec.h"
+
+SACDEC_ERROR subbandTPCreate(HANDLE_STP_DEC *hStpDec);
+
+SACDEC_ERROR subbandTPInit(HANDLE_STP_DEC self);
+
+SACDEC_ERROR subbandTPApply(spatialDec *self, const SPATIAL_BS_FRAME *frame);
+void subbandTPDestroy(HANDLE_STP_DEC *hStpDec);
+
+#endif
diff --git a/fdk-aac/libSACdec/src/sac_tsd.cpp b/fdk-aac/libSACdec/src/sac_tsd.cpp
new file mode 100644
index 0000000..30acca8
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_tsd.cpp
@@ -0,0 +1,353 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):   Matthias Hildenbrand
+
+   Description: USAC MPS212 Transient Steering Decorrelator (TSD)
+
+*******************************************************************************/
+
+#include "sac_tsd.h"
+
+#define TSD_START_BAND (7)
+#define SIZE_S (4)
+#define SIZE_C (5)
+
+/*** Tables ***/
+RAM_ALIGN
+LNK_SECTION_CONSTDATA
+static const UCHAR nBitsTsdCW_32slots[32] = {
+    5,  9,  13, 16, 18, 20, 22, 24, 25, 26, 27, 28, 29, 29, 30, 30,
+    30, 29, 29, 28, 27, 26, 25, 24, 22, 20, 18, 16, 13, 9,  5,  0};
+
+RAM_ALIGN
+LNK_SECTION_CONSTDATA
+static const UCHAR nBitsTsdCW_64slots[64] = {
+    6,  11, 16, 20, 23, 27, 30, 33, 35, 38, 40, 42, 44, 46, 48, 49,
+    51, 52, 53, 55, 56, 57, 58, 58, 59, 60, 60, 60, 61, 61, 61, 61,
+    61, 61, 61, 60, 60, 60, 59, 58, 58, 57, 56, 55, 53, 52, 51, 49,
+    48, 46, 44, 42, 40, 38, 35, 33, 30, 27, 23, 20, 16, 11, 6,  0};
+
+RAM_ALIGN
+LNK_SECTION_CONSTDATA
+static const FIXP_STP phiTsd[8] = {
+    STCP(0x7fffffff, 0x00000000), STCP(0x5a82799a, 0x5a82799a),
+    STCP(0x00000000, 0x7fffffff), STCP(0xa57d8666, 0x5a82799a),
+    STCP(0x80000000, 0x00000000), STCP(0xa57d8666, 0xa57d8666),
+    STCP(0x00000000, 0x80000000), STCP(0x5a82799a, 0xa57d8666),
+};
+
+/*** Static Functions ***/
+static void longmult1(USHORT a[], USHORT b, USHORT d[], int len) {
+  int k;
+  ULONG tmp;
+  ULONG b0 = (ULONG)b;
+
+  tmp = ((ULONG)a[0]) * b0;
+  d[0] = (USHORT)tmp;
+
+  for (k = 1; k < len; k++) {
+    tmp = (tmp >> 16) + ((ULONG)a[k]) * b0;
+    d[k] = (USHORT)tmp;
+  }
+}
+
+static void longdiv(USHORT b[], USHORT a, USHORT d[], USHORT *pr, int len) {
+  ULONG r;
+  ULONG tmp;
+  int k;
+
+  FDK_ASSERT(a != 0);
+
+  r = 0;
+
+  for (k = len - 1; k >= 0; k--) {
+    tmp = ((ULONG)b[k]) + (r << 16);
+
+    if (tmp) {
+      d[k] = (USHORT)(tmp / a);
+      r = tmp - d[k] * a;
+    } else {
+      d[k] = 0;
+    }
+  }
+  *pr = (USHORT)r;
+}
+
+static void longsub(USHORT a[], USHORT b[], int lena, int lenb) {
+  int h;
+  LONG carry = 0;
+
+  FDK_ASSERT(lena >= lenb);
+  for (h = 0; h < lenb; h++) {
+    carry += ((LONG)a[h]) - ((LONG)b[h]);
+    a[h] = (USHORT)carry;
+    carry = carry >> 16;
+  }
+
+  for (; h < lena; h++) {
+    carry = ((LONG)a[h]) + carry;
+    a[h] = (USHORT)carry;
+    carry = carry >> 16;
+  }
+
+  FDK_ASSERT(carry ==
+             0); /* carry != 0 indicates subtraction underflow, e.g. b > a */
+  return;
+}
+
+static int longcompare(USHORT a[], USHORT b[], int len) {
+  int i;
+
+  for (i = len - 1; i > 0; i--) {
+    if (a[i] != b[i]) break;
+  }
+  return (a[i] >= b[i]) ? 1 : 0;
+}
+
+FDK_INLINE int isTrSlot(const TSD_DATA *pTsdData, const int ts) {
+  return (pTsdData->bsTsdTrPhaseData[ts] >= 0);
+}
+
+/*** Public Functions ***/
+int TsdRead(HANDLE_FDK_BITSTREAM hBs, const int numSlots, TSD_DATA *pTsdData) {
+  int nBitsTrSlots = 0;
+  int bsTsdNumTrSlots;
+  const UCHAR *nBitsTsdCW_tab = NULL;
+
+  switch (numSlots) {
+    case 32:
+      nBitsTrSlots = 4;
+      nBitsTsdCW_tab = nBitsTsdCW_32slots;
+      break;
+    case 64:
+      nBitsTrSlots = 5;
+      nBitsTsdCW_tab = nBitsTsdCW_64slots;
+      break;
+    default:
+      return 1;
+  }
+
+  /*** Read TempShapeData for bsTempShapeConfig == 3 ***/
+  pTsdData->bsTsdEnable = FDKreadBit(hBs);
+  if (!pTsdData->bsTsdEnable) {
+    return 0;
+  }
+
+  /*** Parse/Decode TsdData() ***/
+  pTsdData->numSlots = numSlots;
+
+  bsTsdNumTrSlots = FDKreadBits(hBs, nBitsTrSlots);
+
+  /* Decode transient slot positions */
+  {
+    int nBitsTsdCW = (int)nBitsTsdCW_tab[bsTsdNumTrSlots];
+    SCHAR *phaseData = pTsdData->bsTsdTrPhaseData;
+    int p = bsTsdNumTrSlots + 1;
+    int k, h;
+    USHORT s[SIZE_S] = {0};
+    USHORT c[SIZE_C] = {0};
+    USHORT r[1];
+
+    /* Init with TsdSepData[k] = 0 */
+    for (k = 0; k < numSlots; k++) {
+      phaseData[k] = -1; /* means TsdSepData[] = 0 */
+    }
+
+    for (h = (SIZE_S - 1); h >= 0; h--) {
+      if (nBitsTsdCW > h * 16) {
+        s[h] = (USHORT)FDKreadBits(hBs, nBitsTsdCW - h * 16);
+        nBitsTsdCW = h * 16;
+      }
+    }
+
+    /* c = prod_{h=1}^{p} (k-p+h)/h */
+    k = numSlots - 1;
+    c[0] = k - p + 1;
+    for (h = 2; h <= p; h++) {
+      longmult1(c, (k - p + h), c, 5); /* c *= k - p + h; */
+      longdiv(c, h, c, r, 5);          /* c /= h; */
+      FDK_ASSERT(*r == 0);
+    }
+
+    /* go through all slots */
+    for (; k >= 0; k--) {
+      if (p > k) {
+        for (; k >= 0; k--) {
+          phaseData[k] = 1; /* means TsdSepData[] = 1 */
+        }
+        break;
+      }
+      if (longcompare(s, c, 4)) { /* (s >= c) */
+        longsub(s, c, 4, 4);      /* s -= c; */
+        phaseData[k] = 1;         /* means TsdSepData[] = 1 */
+        if (p == 1) {
+          break;
+        }
+        /* Update c for next iteration: c_new = c_old * p / k */
+        longmult1(c, p, c, 5);
+        p--;
+      } else {
+        /* Update c for next iteration: c_new = c_old * (k-p) / k */
+        longmult1(c, (k - p), c, 5);
+      }
+      longdiv(c, k, c, r, 5);
+      FDK_ASSERT(*r == 0);
+    }
+
+    /* Read phase data */
+    for (k = 0; k < numSlots; k++) {
+      if (phaseData[k] == 1) {
+        phaseData[k] = FDKreadBits(hBs, 3);
+      }
+    }
+  }
+
+  return 0;
+}
+
+void TsdGenerateNonTr(const int numHybridBands, const TSD_DATA *pTsdData,
+                      const int ts, FIXP_DBL *pVdirectReal,
+                      FIXP_DBL *pVdirectImag, FIXP_DBL *pVnonTrReal,
+                      FIXP_DBL *pVnonTrImag, FIXP_DBL **ppDecorrInReal,
+                      FIXP_DBL **ppDecorrInImag) {
+  int k = 0;
+
+  if (!isTrSlot(pTsdData, ts)) {
+    /* Let allpass based decorrelator read from direct input. */
+    *ppDecorrInReal = pVdirectReal;
+    *ppDecorrInImag = pVdirectImag;
+    return;
+  }
+
+  /* Generate nonTr input signal for allpass based decorrelator */
+  for (; k < TSD_START_BAND; k++) {
+    pVnonTrReal[k] = pVdirectReal[k];
+    pVnonTrImag[k] = pVdirectImag[k];
+  }
+  for (; k < numHybridBands; k++) {
+    pVnonTrReal[k] = (FIXP_DBL)0;
+    pVnonTrImag[k] = (FIXP_DBL)0;
+  }
+  *ppDecorrInReal = pVnonTrReal;
+  *ppDecorrInImag = pVnonTrImag;
+}
+
+void TsdApply(const int numHybridBands, const TSD_DATA *pTsdData, int *pTsdTs,
+              const FIXP_DBL *pVdirectReal, const FIXP_DBL *pVdirectImag,
+              FIXP_DBL *pDnonTrReal, FIXP_DBL *pDnonTrImag) {
+  const int ts = *pTsdTs;
+
+  if (isTrSlot(pTsdData, ts)) {
+    int k;
+    const FIXP_STP *phi = &phiTsd[pTsdData->bsTsdTrPhaseData[ts]];
+    FDK_ASSERT((pTsdData->bsTsdTrPhaseData[ts] >= 0) &&
+               (pTsdData->bsTsdTrPhaseData[ts] < 8));
+
+    /* d = d_nonTr + v_direct * exp(j * bsTsdTrPhaseData[ts]/4 * pi ) */
+    for (k = TSD_START_BAND; k < numHybridBands; k++) {
+      FIXP_DBL tempReal, tempImag;
+      cplxMult(&tempReal, &tempImag, pVdirectReal[k], pVdirectImag[k], *phi);
+      pDnonTrReal[k] += tempReal;
+      pDnonTrImag[k] += tempImag;
+    }
+  }
+
+  /* The modulo MAX_TSD_TIME_SLOTS operation is to avoid illegal memory accesses
+   * in case of errors. */
+  *pTsdTs = (ts + 1) & (MAX_TSD_TIME_SLOTS - 1);
+  return;
+}
diff --git a/fdk-aac/libSACdec/src/sac_tsd.h b/fdk-aac/libSACdec/src/sac_tsd.h
new file mode 100644
index 0000000..2521e27
--- /dev/null
+++ b/fdk-aac/libSACdec/src/sac_tsd.h
@@ -0,0 +1,167 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/*********************** MPEG surround decoder library *************************
+
+   Author(s):   Matthias Hildenbrand
+
+   Description: USAC MPS212 Transient Steering Decorrelator (TSD)
+
+*******************************************************************************/
+
+#ifndef SAC_TSD_H
+#define SAC_TSD_H
+
+#include "FDK_bitstream.h"
+#include "common_fix.h"
+
+#define MAX_TSD_TIME_SLOTS (64)
+
+/** Structure which holds the data needed to apply TSD to current frame. */
+typedef struct {
+  UCHAR bsTsdEnable; /**< for current frame TSD is (0:disabled, 1:enabled) */
+  UCHAR numSlots;    /**< total number of QMF slots per frame */
+  SCHAR
+  bsTsdTrPhaseData[MAX_TSD_TIME_SLOTS]; /**< -1 => TsdSepData[ts]=0; 0-7:
+                                           values of bsTsdTrPhaseData[ts]
+                                           and TsdSepData[ts]=1 */
+} TSD_DATA;
+
+FDK_INLINE int isTsdActive(const TSD_DATA *pTsdData) {
+  return (int)pTsdData->bsTsdEnable;
+}
+
+/**
+ * \brief Parse and Decode TSD data.
+ * \param[in] hBs bitstream handle to read data from.
+ * \param[in] numSlots number of QMF slots per frame.
+ * \param[out] pTsdData pointer to TSD data structure.
+ * \return 0 on succes, 1 on error.
+ */
+int TsdRead(HANDLE_FDK_BITSTREAM hBs, const int numSlots, TSD_DATA *pTsdData);
+
+/**
+ * \brief Perform transient seperation (v_{x,nonTr} signal).
+ * \param[in] numHybridBands number of hybrid bands.
+ * \param[in] pTsdData pointer to TSD data structure.
+ * \param[in] pVdirectReal pointer to array with direct signal.
+ * \param[in] pVdirectImag pointer to array with direct signal.
+ * \param[out] pVnonTrReal pointer to array with nonTr signal.
+ * \param[out] pVnonTrImag pointer to array with nonTr signal.
+ * \param[out] ppDecorrInReal handle to array where allpass based decorrelator
+ * should read from (modified by this function).
+ * \param[out] ppDecorrInImag handle to array where allpass based decorrelator
+ * should read from (modified by this function).
+ */
+void TsdGenerateNonTr(const int numHybridBands, const TSD_DATA *pTsdData,
+                      const int ts, FIXP_DBL *pVdirectReal,
+                      FIXP_DBL *pVdirectImag, FIXP_DBL *pVnonTrReal,
+                      FIXP_DBL *pVnonTrImag, FIXP_DBL **ppDecorrInReal,
+                      FIXP_DBL **ppDecorrInImag);
+
+/**
+ * \brief Generate d_{x,Tr} signal and add to d_{x,nonTr} signal
+ * \param[in] numHybridBands
+ * \param[in,out] pTsdData
+ * \param pTsdTs pointer to persistent time slot counter
+ * \param[in] pVdirectReal
+ * \param[in] pVdirectImag
+ * \param[out] pDnonTrReal
+ * \param[out] pDnonTrImag
+ */
+void TsdApply(const int numHybridBands, const TSD_DATA *pTsdData, int *pTsdTs,
+              const FIXP_DBL *pVdirectReal, const FIXP_DBL *pVdirectImag,
+              FIXP_DBL *pDnonTrReal, FIXP_DBL *pDnonTrImag);
+
+#endif /* #ifndef SAC_TSD_H */