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+/* -----------------------------------------------------------------------------
+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 */