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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 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 Audio Encoder  ***************************
+
+   Initial Authors:      Markus Multrus
+   Contents/Description: PS Wrapper, Downmix header file
+
+******************************************************************************/
+
+#ifndef __INCLUDED_PS_MAIN_H
+#define __INCLUDED_PS_MAIN_H
+
+/* Includes ******************************************************************/
+#include "sbr_def.h"
+#include "qmf.h"
+#include "ps_encode.h"
+#include "FDK_bitstream.h"
+#include "FDK_hybrid.h"
+
+
+/* Data Types ****************************************************************/
+typedef enum {
+  PSENC_STEREO_BANDS_INVALID = 0,
+  PSENC_STEREO_BANDS_10      = 10,
+  PSENC_STEREO_BANDS_20      = 20
+
+} PSENC_STEREO_BANDS_CONFIG;
+
+typedef enum {
+  PSENC_NENV_1               = 1,
+  PSENC_NENV_2               = 2,
+  PSENC_NENV_4               = 4,
+  PSENC_NENV_DEFAULT         = PSENC_NENV_2,
+  PSENC_NENV_MAX             = PSENC_NENV_4
+
+} PSENC_NENV_CONFIG;
+
+typedef struct {
+  UINT                        bitrateFrom;   /* inclusive */
+  UINT                        bitrateTo;     /* exclusive */
+  PSENC_STEREO_BANDS_CONFIG   nStereoBands;
+  PSENC_NENV_CONFIG           nEnvelopes;
+  LONG                        iidQuantErrorThreshold;  /* quantization threshold to switch between coarse and fine iid quantization */
+
+} psTuningTable_t;
+
+/* Function / Class Declarations *********************************************/
+
+typedef struct T_PARAMETRIC_STEREO {
+  HANDLE_PS_ENCODE            hPsEncode;
+  PS_OUT                      psOut[2];
+
+  FIXP_DBL                    __staticHybridData[HYBRID_READ_OFFSET][MAX_PS_CHANNELS][2][MAX_HYBRID_BANDS];
+  FIXP_DBL                   *pHybridData[HYBRID_READ_OFFSET+HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2];
+
+  FIXP_QMF                    qmfDelayLines[2][QMF_MAX_TIME_SLOTS>>1][QMF_CHANNELS];
+  int                         qmfDelayScale;
+
+  INT                         psDelay;
+  UINT                        maxEnvelopes;
+  UCHAR                       dynBandScale[PS_MAX_BANDS];
+  FIXP_DBL                    maxBandValue[PS_MAX_BANDS];
+  SCHAR                       dmxScale;
+  INT                         initPS;
+  INT                         noQmfSlots;
+  INT                         noQmfBands;
+
+  FIXP_DBL                    __staticHybAnaStatesLF[MAX_PS_CHANNELS][2*HYBRID_FILTER_LENGTH*HYBRID_MAX_QMF_BANDS];
+  FIXP_DBL                    __staticHybAnaStatesHF[MAX_PS_CHANNELS][2*HYBRID_FILTER_DELAY*(QMF_CHANNELS-HYBRID_MAX_QMF_BANDS)];
+  FDK_ANA_HYB_FILTER          fdkHybAnaFilter[MAX_PS_CHANNELS];
+  FDK_SYN_HYB_FILTER          fdkHybSynFilter;
+
+} PARAMETRIC_STEREO;
+
+
+typedef struct T_PSENC_CONFIG {
+  INT                         frameSize;
+  INT                         qmfFilterMode;
+  INT                         sbrPsDelay;
+  PSENC_STEREO_BANDS_CONFIG   nStereoBands;
+  PSENC_NENV_CONFIG           maxEnvelopes;
+  FIXP_DBL                    iidQuantErrorThreshold;
+
+} PSENC_CONFIG, *HANDLE_PSENC_CONFIG;
+
+typedef struct T_PARAMETRIC_STEREO *HANDLE_PARAMETRIC_STEREO;
+
+
+/**
+ * \brief  Create a parametric stereo encoder instance.
+ *
+ * \param phParametricStereo    A pointer to a parametric stereo handle to be allocated. Initialized on return.
+ *
+ * \return
+ *          - PSENC_OK, on succes.
+ *          - PSENC_INVALID_HANDLE, PSENC_MEMORY_ERROR, on failure.
+ */
+FDK_PSENC_ERROR PSEnc_Create(
+        HANDLE_PARAMETRIC_STEREO *phParametricStereo
+        );
+
+
+/**
+ * \brief  Initialize a parametric stereo encoder instance.
+ *
+ * \param hParametricStereo     Meta Data handle.
+ * \param hPsEncConfig          Filled parametric stereo configuration structure.
+ * \param noQmfSlots            Number of slots within one audio frame.
+ * \param noQmfBands            Number of QMF bands.
+ * \param dynamic_RAM           Pointer to preallocated workbuffer.
+ *
+ * \return
+ *          - PSENC_OK, on succes.
+ *          - PSENC_INVALID_HANDLE, PSENC_INIT_ERROR, on failure.
+ */
+FDK_PSENC_ERROR PSEnc_Init(
+        HANDLE_PARAMETRIC_STEREO  hParametricStereo,
+        const HANDLE_PSENC_CONFIG hPsEncConfig,
+        INT                       noQmfSlots,
+        INT                       noQmfBands
+       ,UCHAR                    *dynamic_RAM
+        );
+
+
+/**
+ * \brief  Destroy parametric stereo encoder instance.
+ *
+ * Deallocate instance and free whole memory.
+ *
+ * \param phParametricStereo    Pointer to the parametric stereo handle to be deallocated.
+ *
+ * \return
+ *          - PSENC_OK, on succes.
+ *          - PSENC_INVALID_HANDLE, on failure.
+ */
+FDK_PSENC_ERROR PSEnc_Destroy(
+        HANDLE_PARAMETRIC_STEREO *phParametricStereo
+        );
+
+
+/**
+ * \brief  Apply parametric stereo processing.
+ *
+ * \param hParametricStereo     Meta Data handle.
+ * \param samples               Pointer to 2 channel audio input signal.
+ * \param timeInStride,         Stride factor of input buffer.
+ * \param hQmfAnalysis,         Pointer to QMF analysis filterbanks.
+ * \param downmixedRealQmfData  Pointer to real QMF buffer to be written to.
+ * \param downmixedImagQmfData  Pointer to imag QMF buffer to be written to.
+ * \param downsampledOutSignal  Pointer to buffer where to write downmixed timesignal.
+ * \param sbrSynthQmf           Pointer to QMF synthesis filterbank.
+ * \param qmfScale              Return scaling factor of the qmf data.
+ * \param sendHeader            Signal whether to write header data.
+ *
+ * \return
+ *          - PSENC_OK, on succes.
+ *          - PSENC_INVALID_HANDLE, PSENC_ENCODE_ERROR, on failure.
+ */
+FDK_PSENC_ERROR FDKsbrEnc_PSEnc_ParametricStereoProcessing(
+        HANDLE_PARAMETRIC_STEREO  hParametricStereo,
+        INT_PCM                  *samples[2],
+        UINT                      timeInStride,
+        QMF_FILTER_BANK         **hQmfAnalysis,
+        FIXP_QMF **RESTRICT       downmixedRealQmfData,
+        FIXP_QMF **RESTRICT       downmixedImagQmfData,
+        INT_PCM                  *downsampledOutSignal,
+        HANDLE_QMF_FILTER_BANK    sbrSynthQmf,
+        SCHAR                    *qmfScale,
+        const int                 sendHeader
+        );
+
+
+/**
+ * \brief  Write parametric stereo bitstream.
+ *
+ * Write ps_data() element to bitstream and return number of written bits.
+ * Returns number of written bits only, if hBitstream == NULL.
+ *
+ * \param hParametricStereo     Meta Data handle.
+ * \param hBitstream            Bitstream buffer handle.
+ *
+ * \return
+ *          - number of written bits.
+ */
+INT FDKsbrEnc_PSEnc_WritePSData(
+        HANDLE_PARAMETRIC_STEREO  hParametricStereo,
+        HANDLE_FDK_BITSTREAM      hBitstream
+        );
+
+#endif /* __INCLUDED_PS_MAIN_H */