Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 1667 insertions, 0 deletions

diff --git a/libAACdec/src/aacdecoder.cpp b/libAACdec/src/aacdecoder.cpp
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+/*****************************  MPEG-4 AAC Decoder  **************************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Josef Hoepfl
+   Description:
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+
+/*!
+  \page default General Overview of the AAC Decoder Implementation
+
+  The main entry point to decode a AAC frame is CAacDecoder_DecodeFrame(). It handles the different
+  transport multiplexes and bitstream formats supported by this implementation. It extracts the
+  AAC_raw_data_blocks from these bitstreams to further process then in the actual decoding stages.
+
+  Note: Click on a function of file in the above image to see details about the function. Also note, that
+  this is just an overview of the most important functions and not a complete call graph.
+
+  <h2>1 Bitstream deformatter</h2>
+  The basic bit stream parser function CChannelElement_Read() is called. It uses other subcalls in order
+  to parse and unpack the bitstreams. Note, that this includes huffmann decoding of the coded spectral data.
+  This operation can be computational significant specifically at higher bitrates. Optimization is likely in
+  CBlock_ReadSpectralData().
+
+  The bitstream deformatter also includes many bitfield operations. Profiling on the target will determine
+  required optimizations.
+
+  <h2>2 Actual decoding to retain the time domain output</h2>
+  The basic bitstream deformatter function CChannelElement_Decode() for CPE elements and SCE elements are called.
+  Except for the stereo processing (2.1) which is only used for CPE elements, the function calls for CPE or SCE
+  are similar, except that CPE always processes to independent channels while SCE only processes one channel.
+
+  Often there is the distinction between long blocks and short blocks. However, computational expensive functions
+  that ususally require optimization are being shared by these two groups,
+
+  <h3>2.1 Stereo processing for CPE elements</h3>
+  CChannelPairElement_Decode() first calles the joint stereo  tools in stereo.cpp when required.
+
+  <h3>2.2 Scaling of spectral data</h3>
+  CBlock_ScaleSpectralData().
+
+  <h3>2.3 Apply additional coding tools</h3>
+  ApplyTools() calles the PNS tools in case of MPEG-4 bitstreams, and TNS filtering CTns_Apply() for MPEG-2 and MPEG-4 bitstreams.
+  The function TnsFilterIIR() which is called by CTns_Apply() (2.3.1) might require some optimization.
+
+  <h2>3 Frequency-To-Time conversion</h3>
+  The filterbank is called using CBlock_FrequencyToTime() using the MDCT module from the FDK Tools
+
+*/
+
+
+
+#include "aacdecoder.h"
+
+#include "aac_rom.h"
+#include "aac_ram.h"
+#include "channel.h"
+#include "FDK_audio.h"
+
+#include "FDK_tools_rom.h"
+
+  #include "aacdec_pns.h"
+
+/*#ifdef AACDEC_HDAAC_ENABLE
+#include "slsdecifc.h"
+#endif
+*/
+
+  #include "sbrdecoder.h"
+
+
+
+
+  #include "aacdec_hcr.h"
+  #include "rvlc.h"
+
+
+#include "tpdec_lib.h"
+
+#include "conceal.h"
+
+
+
+#define CAN_DO_PS(aot) \
+  ((aot) == AOT_AAC_LC \
+|| (aot) == AOT_SBR \
+|| (aot) == AOT_PS \
+|| (aot) == AOT_ER_BSAC \
+|| (aot) == AOT_DRM_AAC)
+
+#define IS_USAC(aot) \
+  ((aot) == AOT_USAC \
+|| (aot) == AOT_RSVD50)
+
+#define IS_LOWDELAY(aot) \
+  ((aot) == AOT_ER_AAC_LD \
+|| (aot) == AOT_ER_AAC_ELD)
+
+void CAacDecoder_SyncQmfMode(HANDLE_AACDECODER self)
+{
+
+  /* Assign user requested mode */
+  self->qmfModeCurr = self->qmfModeUser;
+
+  if ( self->qmfModeCurr == NOT_DEFINED )
+  {
+    if ( (IS_LOWDELAY(self->streamInfo.aot) && (self->flags & AC_MPS_PRESENT))
+      || ( (self->ascChannels == 1)
+        && ( (CAN_DO_PS(self->streamInfo.aot) && !(self->flags & AC_MPS_PRESENT))
+          || (  IS_USAC(self->streamInfo.aot) &&  (self->flags & AC_MPS_PRESENT)) ) ) )
+    {
+      self->qmfModeCurr = MODE_HQ;
+    } else {
+      self->qmfModeCurr = MODE_LP;
+    }
+  }
+
+
+  /* Set SBR to current QMF mode. Error does not matter. */
+  sbrDecoder_SetParam(self->hSbrDecoder, SBR_QMF_MODE, (self->qmfModeCurr == MODE_LP));
+  self->psPossible = ((CAN_DO_PS(self->streamInfo.aot) && self->aacChannels == 1 && ! (self->flags & AC_MPS_PRESENT))) && self->qmfModeCurr == MODE_HQ ;
+  FDK_ASSERT( ! ( (self->flags & AC_MPS_PRESENT) && self->psPossible ) );
+}
+
+void CAacDecoder_SignalInterruption(HANDLE_AACDECODER self)
+{
+}
+
+/*!
+  \brief Reset ancillary data struct. Call before parsing a new frame.
+
+  \ancData Pointer to ancillary data structure
+
+  \return  Error code
+*/
+static AAC_DECODER_ERROR CAacDecoder_AncDataReset(CAncData *ancData)
+{
+  int i;
+  for (i=0; i<8; i++)
+  {
+    ancData->offset[i] = 0;
+  }
+  ancData->nrElements = 0;
+
+  return AAC_DEC_OK;
+}
+
+/*!
+  \brief Initialize ancillary buffer
+
+  \ancData Pointer to ancillary data structure
+  \buffer Pointer to (external) anc data buffer
+  \size Size of the buffer pointed on by buffer in bytes
+
+  \return  Error code
+*/
+AAC_DECODER_ERROR CAacDecoder_AncDataInit(CAncData *ancData, unsigned char *buffer, int size)
+{
+  if (size >= 0) {
+    ancData->buffer = buffer;
+    ancData->bufferSize = size;
+
+    CAacDecoder_AncDataReset(ancData);
+
+    return AAC_DEC_OK;
+  }
+
+  return AAC_DEC_ANC_DATA_ERROR;
+}
+
+/*!
+  \brief Get one ancillary data element
+
+  \ancData Pointer to ancillary data structure
+  \index Index of the anc data element to get
+  \ptr Pointer to a buffer receiving a pointer to the requested anc data element
+  \size Pointer to a buffer receiving the length of the requested anc data element in bytes
+
+  \return  Error code
+*/
+AAC_DECODER_ERROR CAacDecoder_AncDataGet(CAncData *ancData, int index, unsigned char **ptr, int *size)
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+
+  *ptr  = NULL;
+  *size = 0;
+
+  if (index >= 0 && index < 8 && index < ancData->nrElements)
+  {
+    *ptr  = &ancData->buffer[ancData->offset[index]];
+    *size = ancData->offset[index+1] - ancData->offset[index];
+  }
+
+  return error;
+}
+
+
+/*!
+  \brief Parse ancillary data
+
+  \ancData Pointer to ancillary data structure
+  \hBs Handle to FDK bitstream
+  \ancBytes Length of ancillary data to read from the bitstream
+
+  \return  Error code
+*/
+static
+AAC_DECODER_ERROR CAacDecoder_AncDataParse (
+                                             CAncData *ancData,
+                                             HANDLE_FDK_BITSTREAM hBs,
+                                             const int ancBytes )
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+  int readBytes = 0;
+
+  if (ancData->buffer != NULL)
+  {
+    if (ancBytes > 0) {
+      /* write ancillary data to external buffer */
+      int offset = ancData->offset[ancData->nrElements];
+
+      if ((offset + ancBytes) > ancData->bufferSize)
+      {
+        error = AAC_DEC_TOO_SMALL_ANC_BUFFER;
+      }
+      else if (ancData->nrElements >= 8-1)
+      {
+        error = AAC_DEC_TOO_MANY_ANC_ELEMENTS;
+      }
+      else
+      {
+        int i;
+
+        for (i = 0; i < ancBytes; i++) {
+          ancData->buffer[i+offset] = FDKreadBits(hBs, 8);
+          readBytes++;
+        }
+
+        ancData->nrElements++;
+        ancData->offset[ancData->nrElements] = ancBytes + ancData->offset[ancData->nrElements-1];
+      }
+    }
+  }
+
+  readBytes = ancBytes - readBytes;
+
+  if (readBytes > 0) {
+    /* skip data */
+    FDKpushFor(hBs, readBytes<<3);
+  }
+
+  return error;
+}
+
+/*!
+  \brief Read Stream Data Element
+
+  \bs Bitstream Handle
+
+  \return  Error code
+*/
+static AAC_DECODER_ERROR CDataStreamElement_Read (
+                                                  HANDLE_FDK_BITSTREAM bs,
+                                                  CAncData *ancData,
+                                                  HANDLE_AAC_DRC hDrcInfo,
+                                                  HANDLE_TRANSPORTDEC pTp,
+                                                  UCHAR    *elementInstanceTag,
+                                                  UINT      alignmentAnchor )
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+  UINT dataStart;
+  int dataByteAlignFlag, count;
+
+  int crcReg = transportDec_CrcStartReg(pTp, 0);
+
+  /* Element Instance Tag */
+  *elementInstanceTag = FDKreadBits(bs,4);
+  /* Data Byte Align Flag */
+  dataByteAlignFlag = FDKreadBits(bs,1);
+
+  count = FDKreadBits(bs,8);
+
+  if (count == 255) {
+    count += FDKreadBits(bs,8); /* EscCount */
+  }
+
+  if (dataByteAlignFlag) {
+    FDKbyteAlign(bs, alignmentAnchor);
+  }
+
+  dataStart = FDKgetValidBits(bs);
+
+  error = CAacDecoder_AncDataParse(ancData, bs, count);
+  transportDec_CrcEndReg(pTp, crcReg);
+
+  {
+    INT readBits, dataBits = count<<3;
+    
+    /* Move to the beginning of the data junk */
+    FDKpushBack(bs, dataStart-FDKgetValidBits(bs));
+
+    /* Read Anc data if available */
+    readBits = aacDecoder_drcMarkPayload( hDrcInfo, bs, DVB_DRC_ANC_DATA );
+
+    if (readBits != dataBits) {
+      /* Move to the end again. */
+      FDKpushBiDirectional(bs, FDKgetValidBits(bs)-dataStart+dataBits);
+    }
+  }
+
+  return error;
+}
+
+#ifdef TP_PCE_ENABLE
+/*!
+  \brief Read Program Config Element
+
+  \bs Bitstream Handle
+  \count Pointer to program config element.
+
+  \return  Error code
+*/
+static AAC_DECODER_ERROR CProgramConfigElement_Read (
+    HANDLE_FDK_BITSTREAM bs,
+    HANDLE_TRANSPORTDEC  pTp,
+    CProgramConfig      *pce,
+    UINT                 alignAnchor )
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+  int crcReg;
+
+  /* read PCE to temporal buffer first */
+  C_ALLOC_SCRATCH_START(tmpPce, CProgramConfig, 1);
+  
+  CProgramConfig_Init(tmpPce);
+  CProgramConfig_Reset(tmpPce);
+
+  crcReg = transportDec_CrcStartReg(pTp, 0);
+
+  CProgramConfig_Read(tmpPce, bs, alignAnchor);
+
+  transportDec_CrcEndReg(pTp, crcReg);
+
+  if (!pce->isValid && tmpPce->NumChannels <= (6) && tmpPce->Profile == 1) {
+    /* store PCE data */
+    FDKmemcpy(pce, tmpPce, sizeof(CProgramConfig));
+  }
+
+  C_ALLOC_SCRATCH_END(tmpPce, CProgramConfig, 1);
+
+  return error;
+}
+#endif
+
+/*!
+  \brief Parse Extension Payload
+
+  \self Handle of AAC decoder
+  \count Pointer to bit counter.
+  \previous_element ID of previous element (required by some extension payloads)
+
+  \return  Error code
+*/
+static
+AAC_DECODER_ERROR CAacDecoder_ExtPayloadParse (HANDLE_AACDECODER self,
+                                               HANDLE_FDK_BITSTREAM hBs,
+                                               int *count,
+                                               MP4_ELEMENT_ID previous_element,
+                                               int elIndex,
+                                               int fIsFillElement)
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+  EXT_PAYLOAD_TYPE extension_type;
+  int bytes = (*count) >> 3;
+  int crcFlag = 0;
+
+  if (*count < 4) {
+    return AAC_DEC_PARSE_ERROR;
+  } else if ((INT)FDKgetValidBits(hBs) < *count) {
+    return AAC_DEC_DECODE_FRAME_ERROR;
+  }
+
+  extension_type = (EXT_PAYLOAD_TYPE) FDKreadBits(hBs, 4);    /* bs_extension_type */
+  *count -= 4;
+
+  switch (extension_type)
+  {
+  case EXT_DYNAMIC_RANGE:
+    {
+      INT readBits = aacDecoder_drcMarkPayload( self->hDrcInfo, hBs, MPEG_DRC_EXT_DATA );
+
+      if (readBits > *count)
+      {
+        FDKpushBack(hBs, readBits - *count);
+        error = AAC_DEC_PARSE_ERROR;
+        return error;
+      }
+      else
+      {
+        *count -= (readBits+7) & ~0x7;
+      }
+    }
+    break;
+  case EXT_LDSAC_DATA:
+  case EXT_SAC_DATA:
+    /* Skip MPEG Surround Extension payload */
+    FDKpushFor(hBs, *count);
+    *count = 0;
+    break;
+
+  case EXT_SBR_DATA_CRC:
+    crcFlag = 1;
+
+  case EXT_SBR_DATA:
+    {
+      SBR_ERROR sbrError;
+
+      CAacDecoder_SyncQmfMode(self);
+
+      sbrError = sbrDecoder_InitElement(
+              self->hSbrDecoder,
+              self->streamInfo.aacSampleRate,
+              self->streamInfo.extSamplingRate,
+              self->streamInfo.aacSamplesPerFrame,
+              self->streamInfo.aot,
+              previous_element,
+              elIndex
+              );
+
+      if (sbrError == SBRDEC_OK) {
+        sbrError = sbrDecoder_Parse (
+                self->hSbrDecoder,
+                hBs,
+                count,
+               *count,
+                crcFlag,
+                previous_element,
+                elIndex,
+                self->flags & AC_INDEP );
+        /* Enable SBR for implicit SBR signalling. */
+        if (sbrError == SBRDEC_OK) {
+          self->sbrEnabled = 1;
+        }
+      } else {
+        /* Do not try to apply SBR because initializing the element failed. */
+        self->sbrEnabled = 0;
+      }
+      /* Citation from ISO/IEC 14496-3 chapter 4.5.2.1.5.2
+      Fill elements containing an extension_payload() with an extension_type of EXT_SBR_DATA
+      or EXT_SBR_DATA_CRC shall not contain any other extension_payload of any other extension_type.
+      */
+      if (fIsFillElement) {
+        FDKpushBiDirectional(hBs, *count);
+        *count = 0;
+      } else {
+        /* If this is not a fill element with a known length, we are screwed an no further parsing makes sense. */
+        if (sbrError != SBRDEC_OK) {
+          self->frameOK = 0;
+        }
+      }
+    }
+    break;
+
+  case EXT_FILL_DATA:
+    {
+      int temp;
+
+      temp = FDKreadBits(hBs,4);
+      bytes--;
+      if (temp != 0) {
+        error = AAC_DEC_PARSE_ERROR;
+        break;
+      }
+      while (bytes > 0) {
+        temp = FDKreadBits(hBs,8);
+        bytes--;
+        if (temp != 0xa5) {
+          error = AAC_DEC_PARSE_ERROR;
+          break;
+        }
+      }
+      *count = bytes<<3;
+    }
+    break;
+
+  case EXT_DATA_ELEMENT:
+    {
+      int dataElementVersion;
+
+      dataElementVersion = FDKreadBits(hBs,4);
+      *count -= 4;
+      if (dataElementVersion == 0) /* ANC_DATA */
+      {
+        int temp, dataElementLength = 0;
+        do {
+          temp = FDKreadBits(hBs,8);
+          *count -= 8;
+          dataElementLength += temp;
+        } while (temp == 255 );
+
+        CAacDecoder_AncDataParse(&self->ancData, hBs, dataElementLength);
+        *count -= (dataElementLength<<3);
+      } else {
+        /* align = 0 */
+        FDKpushFor(hBs, (*count)<<3);
+        *count = 0;
+      }
+    }
+    break;
+
+  case EXT_DATA_LENGTH:
+    {
+      int bitCnt, len = FDKreadBits(hBs, 4);
+      *count -= 4;
+      
+      if (len == 15) {
+        int add_len = FDKreadBits(hBs, 8);
+        *count -= 8;
+        len += add_len;
+
+        if (add_len == 255) {
+          len += FDKreadBits(hBs, 16);
+          *count -= 16;
+        }
+      }
+      len <<= 3;
+      bitCnt = len;
+
+      if ( (EXT_PAYLOAD_TYPE)FDKreadBits(hBs, 4) == EXT_DATA_LENGTH ) {
+        /* Check NOTE 2: The extension_payload() included here must
+                         not have extension_type == EXT_DATA_LENGTH. */
+        error = AAC_DEC_PARSE_ERROR;
+      } else {
+        /* rewind and call myself again. */
+        FDKpushBack(hBs, 4);
+
+        error =
+          CAacDecoder_ExtPayloadParse (
+                  self,
+                  hBs,
+                 &bitCnt,
+                  previous_element,
+                  elIndex,
+                  0 );
+
+        *count -= len - bitCnt;
+      }
+    }
+    break;
+
+  case EXT_FIL:
+
+  default:
+    /* align = 4 */
+    FDKpushFor(hBs, *count);
+    *count = 0;
+    break;
+  }
+
+  return error;
+}
+
+/*  Stream Configuration and Information.
+
+    This class holds configuration and information data for a stream to be decoded. It
+    provides the calling application as well as the decoder with substantial information,
+    e.g. profile, sampling rate, number of channels found in the bitstream etc.
+*/
+static
+void CStreamInfoInit(CStreamInfo *pStreamInfo)
+{
+  pStreamInfo->aacSampleRate = 0;
+  pStreamInfo->profile = -1;
+  pStreamInfo->aot = AOT_NONE;
+
+  pStreamInfo->channelConfig = -1;
+  pStreamInfo->bitRate = 0;
+  pStreamInfo->aacSamplesPerFrame = 0;
+
+  pStreamInfo->extAot  = AOT_NONE;
+  pStreamInfo->extSamplingRate = 0;
+
+  pStreamInfo->flags = 0;
+
+  pStreamInfo->epConfig = -1;   /* default is no ER */
+
+  pStreamInfo->numChannels = 0;
+  pStreamInfo->sampleRate = 0;
+  pStreamInfo->frameSize = 0;
+}
+
+/*!
+  \brief Initialization of AacDecoderChannelInfo
+
+  The function initializes the pointers to AacDecoderChannelInfo for each channel,
+  set the start values for window shape and window sequence of overlap&add to zero,
+  set the overlap buffer to zero and initializes the pointers to the window coefficients.
+  \param bsFormat is the format of the AAC bitstream
+
+  \return  AACDECODER instance
+*/
+LINKSPEC_CPP HANDLE_AACDECODER CAacDecoder_Open(TRANSPORT_TYPE bsFormat)    /*!< bitstream format (adif,adts,loas,...). */
+{
+  HANDLE_AACDECODER self;
+
+  self = GetAacDecoder();
+  if (self == NULL) {
+    goto bail;
+  }
+
+  /* Assign channel mapping info arrays (doing so removes dependency of settings header in API header). */
+  self->streamInfo.pChannelIndices = self->channelIndices;
+  self->streamInfo.pChannelType = self->channelType;
+
+  /* set default output mode */
+  self->outputInterleaved = 1;  /* interleaved */
+
+  /* initialize anc data */
+  CAacDecoder_AncDataInit(&self->ancData, NULL, 0);
+
+  /* initialize stream info */
+  CStreamInfoInit(&self->streamInfo);
+
+  /* initialize error concealment common data */
+  CConcealment_InitCommonData(&self->concealCommonData);
+
+  self->hDrcInfo = GetDrcInfo();
+  if (self->hDrcInfo == NULL) {
+    goto bail;
+  }
+  /* Init common DRC structure */
+  aacDecoder_drcInit( self->hDrcInfo );
+  /* Set default frame delay */
+  aacDecoder_drcSetParam (
+          self->hDrcInfo,
+          DRC_BS_DELAY,
+          CConcealment_GetDelay(&self->concealCommonData)
+        );
+
+
+  self->aacCommonData.workBufferCore1 = GetWorkBufferCore1();
+  self->aacCommonData.workBufferCore2 = GetWorkBufferCore2();
+  if (self->aacCommonData.workBufferCore1 == NULL
+    ||self->aacCommonData.workBufferCore2 == NULL )
+    goto bail;
+
+  return self;
+
+bail:
+  CAacDecoder_Close( self );
+
+  return NULL;
+}
+
+/* Destroy aac decoder */
+LINKSPEC_CPP void CAacDecoder_Close(HANDLE_AACDECODER self)
+{
+  int ch;
+
+  if (self == NULL)
+    return;
+
+  for (ch=0; ch<(6); ch++) {
+    if (self->pAacDecoderStaticChannelInfo[ch] != NULL) {
+      FreeOverlapBuffer (&self->pAacDecoderStaticChannelInfo[ch]->pOverlapBuffer);
+      FreeAacDecoderStaticChannelInfo (&self->pAacDecoderStaticChannelInfo[ch]);
+    }
+    if (self->pAacDecoderChannelInfo[ch] != NULL) {
+      FreeAacDecoderChannelInfo (&self->pAacDecoderChannelInfo[ch]);
+    }
+  }
+
+  self->aacChannels = 0;
+
+  if (self->hDrcInfo) {
+    FreeDrcInfo(&self->hDrcInfo);
+  }
+
+  FreeWorkBufferCore1 (&self->aacCommonData.workBufferCore1);
+  FreeWorkBufferCore2 (&self->aacCommonData.workBufferCore2);
+
+  FreeAacDecoder ( &self);
+}
+
+
+/*!
+  \brief Initialization of decoder instance
+
+  The function initializes the decoder.
+
+  \return  error status: 0 for success, <>0 for unsupported configurations
+*/
+LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_Init(HANDLE_AACDECODER self, const CSAudioSpecificConfig *asc)
+{
+  AAC_DECODER_ERROR err = AAC_DEC_OK;
+  INT ascChannels, ch, ascChanged = 0;
+
+  if (!self)
+    return AAC_DEC_INVALID_HANDLE;
+
+  // set profile and check for supported aot
+  // leave profile on default (=-1) for all other supported MPEG-4 aot's except aot=2 (=AAC-LC)
+  switch (asc->m_aot) {
+  case AOT_AAC_LC:
+    self->streamInfo.profile = 1;
+    break;
+
+  case AOT_SBR:
+  case AOT_PS:
+  case AOT_ER_AAC_LD:
+  case AOT_ER_AAC_ELD:
+    break;
+
+  default:
+    return AAC_DEC_UNSUPPORTED_AOT;
+  }
+
+  CProgramConfig_Init(&self->pce);
+
+  /* set channels */
+  switch (asc->m_channelConfiguration) {
+  case 0:
+#ifdef TP_PCE_ENABLE
+    /* get channels from program config (ASC) */
+    if (CProgramConfig_IsValid(&asc->m_progrConfigElement)) {
+      ascChannels = asc->m_progrConfigElement.NumChannels;
+      if (ascChannels > 0) {
+        int el;
+        /* valid number of channels -> copy program config element (PCE) from ASC */
+        FDKmemcpy(&self->pce, &asc->m_progrConfigElement, sizeof(CProgramConfig));
+        /* Built element table */
+        el = CProgramConfig_GetElementTable(&asc->m_progrConfigElement, self->elements);
+        for (; el<7; el++) {
+          self->elements[el] = ID_NONE;
+        }
+      } else {
+        return AAC_DEC_UNSUPPORTED_CHANNELCONFIG;
+      }
+    } else {
+      if (transportDec_GetFormat(self->hInput) == TT_MP4_ADTS) {
+        /* set default max_channels for memory allocation because in implicit channel mapping mode
+           we don't know the actual number of channels until we processed at least one raw_data_block(). */
+        ascChannels = (6);
+      } else {
+        return AAC_DEC_UNSUPPORTED_CHANNELCONFIG;
+      }
+    }
+#else /* TP_PCE_ENABLE */
+    return AAC_DEC_UNSUPPORTED_CHANNELCONFIG;
+#endif /* TP_PCE_ENABLE */
+    break;
+  case 1: case 2: case 3: case 4: case 5: case 6:
+    ascChannels = asc->m_channelConfiguration;
+    break;
+  case 7:
+    ascChannels = 8;
+    break;
+  default:
+    return AAC_DEC_UNSUPPORTED_CHANNELCONFIG;
+  }
+
+  /* Initialize constant mappings for channel config 1-7 */
+  if (asc->m_channelConfiguration > 0) {
+    int el;
+    FDKmemcpy(self->elements, elementsTab[asc->m_channelConfiguration-1], sizeof(MP4_ELEMENT_ID)*FDKmin(7,7));
+    for (el=7; el<7; el++) {
+      self->elements[el] = ID_NONE;
+    }
+    for (ch=0; ch<ascChannels; ch++) {
+      self->chMapping[ch] = ch;
+    }
+    for (; ch<(6); ch++) {
+      self->chMapping[ch] = 255;
+    }
+  }
+
+  self->streamInfo.channelConfig = asc->m_channelConfiguration;
+
+  if (ascChannels > (6)) {
+    return AAC_DEC_UNSUPPORTED_CHANNELCONFIG;
+  }
+  if (self->streamInfo.aot != asc->m_aot) {
+    self->streamInfo.aot = asc->m_aot;
+    ascChanged = 1;
+  }
+
+  if (self->streamInfo.aacSamplesPerFrame != (INT)asc->m_samplesPerFrame) {
+    self->streamInfo.aacSamplesPerFrame = asc->m_samplesPerFrame;
+    ascChanged = 1;
+  }
+
+  self->streamInfo.bitRate            = 0;
+
+  /* Set syntax flags */
+  self->flags = 0;
+
+  self->streamInfo.extAot               = asc->m_extensionAudioObjectType;
+  self->streamInfo.extSamplingRate      = asc->m_extensionSamplingFrequency;
+  self->flags |= (asc->m_sbrPresentFlag) ? AC_SBR_PRESENT : 0;
+  self->flags |= (asc->m_psPresentFlag) ? AC_PS_PRESENT : 0;
+  self->sbrEnabled = 0;
+
+  /* --------- vcb11 ------------ */
+  self->flags |= (asc->m_vcb11Flag) ? AC_ER_VCB11 : 0;
+
+  /* ---------- rvlc ------------ */
+  self->flags |= (asc->m_rvlcFlag) ? AC_ER_RVLC : 0;
+
+  /* ----------- hcr ------------ */
+  self->flags |= (asc->m_hcrFlag) ? AC_ER_HCR : 0;
+
+  if (asc->m_aot == AOT_ER_AAC_ELD) {
+    self->flags |=  AC_ELD;
+    self->flags |= (asc->m_sc.m_eldSpecificConfig.m_sbrCrcFlag) ? AC_SBRCRC : 0;
+    self->flags |= (asc->m_sc.m_eldSpecificConfig.m_useLdQmfTimeAlign) ? AC_LD_MPS : 0;
+  }
+  self->flags |= (asc->m_aot == AOT_ER_AAC_LD) ? AC_LD : 0;
+  self->flags |= (asc->m_epConfig >= 0) ? AC_ER : 0;
+
+
+  if (asc->m_sbrPresentFlag) {
+    self->sbrEnabled = 1;
+    self->sbrEnabledPrev = 1;
+  }
+  if (asc->m_psPresentFlag) {
+    self->flags |= AC_PS_PRESENT;
+  }
+
+  if ( (asc->m_epConfig >= 0)
+    && (asc->m_channelConfiguration <= 0) ) {
+    /* we have to know the number of channels otherwise no decoding is possible */
+    return AAC_DEC_UNSUPPORTED_ER_FORMAT;
+  }
+
+  self->streamInfo.epConfig = asc->m_epConfig;
+  /* self->hInput->asc.m_epConfig = asc->m_epConfig; */
+
+  if (asc->m_epConfig > 1)
+    return AAC_DEC_UNSUPPORTED_ER_FORMAT;
+
+  /* Check if samplerate changed. */
+  if (self->streamInfo.aacSampleRate != (INT)asc->m_samplingFrequency) {
+    AAC_DECODER_ERROR error;
+
+    ascChanged = 1;
+
+    /* Update samplerate info. */
+    error = getSamplingRateInfo(&self->samplingRateInfo, asc->m_samplesPerFrame, asc->m_samplingFrequencyIndex, asc->m_samplingFrequency);
+    if (error != AAC_DEC_OK) {
+      return error;
+    }
+    self->streamInfo.aacSampleRate = self->samplingRateInfo.samplingRate;
+  }
+
+  /* Check if amount of channels has changed. */
+  if (self->ascChannels != ascChannels)
+  {
+     ascChanged = 1;
+
+     /* Allocate all memory structures for each channel */
+     {
+       for (ch = 0; ch < ascChannels; ch++) {
+         CAacDecoderDynamicData *aacDecoderDynamicData = &self->aacCommonData.workBufferCore1->pAacDecoderDynamicData[ch%2];
+
+         /* initialize pointer to CAacDecoderChannelInfo */
+         if (self->pAacDecoderChannelInfo[ch] == NULL) {
+           self->pAacDecoderChannelInfo[ch] = GetAacDecoderChannelInfo(ch);
+           /* This is temporary until the DynamicData is split into two or more regions!
+              The memory could be reused after completed core decoding. */
+           if (self->pAacDecoderChannelInfo[ch] == NULL) {
+             goto bail;
+           }
+           /* Hook shared work memory into channel data structure */
+           self->pAacDecoderChannelInfo[ch]->pDynData =  aacDecoderDynamicData;
+           self->pAacDecoderChannelInfo[ch]->pComData = &self->aacCommonData;
+         }
+
+         /* Allocate persistent channel memory */
+         if (self->pAacDecoderStaticChannelInfo[ch] == NULL) {
+           self->pAacDecoderStaticChannelInfo[ch] = GetAacDecoderStaticChannelInfo(ch);
+           if (self->pAacDecoderStaticChannelInfo[ch] == NULL) {
+             goto bail;
+           }
+           self->pAacDecoderStaticChannelInfo[ch]->pOverlapBuffer = GetOverlapBuffer(ch); /* This area size depends on the AOT */
+           if (self->pAacDecoderStaticChannelInfo[ch]->pOverlapBuffer == NULL) {
+             goto bail;
+           }
+           self->pAacDecoderChannelInfo[ch]->pSpectralCoefficient = (SPECTRAL_PTR) &self->aacCommonData.workBufferCore2[ch*1024];
+
+         }
+         CPns_InitPns(&self->pAacDecoderChannelInfo[ch]->data.aac.PnsData, &self->aacCommonData.pnsInterChannelData, &self->aacCommonData.pnsCurrentSeed, self->aacCommonData.pnsRandomSeed);
+       }
+
+
+       HcrInitRom(&self->aacCommonData.overlay.aac.erHcrInfo);
+       setHcrType(&self->aacCommonData.overlay.aac.erHcrInfo, ID_SCE);
+
+       /* Make allocated channel count persistent in decoder context. */
+       self->aacChannels = ascChannels;
+    }
+
+    /* Make amount of signalled channels persistent in decoder context. */
+    self->ascChannels = ascChannels;
+  }
+
+  /* Update structures */
+  if (ascChanged) {
+
+     /* Things to be done for each channel, which do not involved allocating memory. */
+     for (ch = 0; ch < ascChannels; ch++) {
+       switch (self->streamInfo.aot) {
+         case AOT_ER_AAC_ELD:
+         case AOT_ER_AAC_LD:
+           self->pAacDecoderChannelInfo[ch]->granuleLength = self->streamInfo.aacSamplesPerFrame;
+           break;
+         default:
+           self->pAacDecoderChannelInfo[ch]->granuleLength = self->streamInfo.aacSamplesPerFrame / 8;
+           break;
+       }
+       mdct_init( &self->pAacDecoderStaticChannelInfo[ch]->IMdct,
+                   self->pAacDecoderStaticChannelInfo[ch]->pOverlapBuffer,
+                   OverlapBufferSize );
+
+
+        /* Reset DRC control data for this channel */
+        aacDecoder_drcInitChannelData ( &self->pAacDecoderStaticChannelInfo[ch]->drcData );
+
+       /* Reset concealment only if ASC changed. Otherwise it will be done with any config callback.
+          E.g. every time the LATM SMC is present. */
+       CConcealment_InitChannelData(&self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo,
+                                    &self->concealCommonData,
+                                     self->streamInfo.aacSamplesPerFrame );
+     }
+  }
+
+  /* Update externally visible copy of flags */
+  self->streamInfo.flags = self->flags;
+
+  return err;
+
+bail:
+  aacDecoder_Close( self );
+  return AAC_DEC_OUT_OF_MEMORY;
+}
+
+
+LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
+        HANDLE_AACDECODER self,
+        const UINT flags,
+        INT_PCM *pTimeData,
+        const INT  timeDataSize,
+        const INT interleaved
+        )
+{
+  AAC_DECODER_ERROR ErrorStatus = AAC_DEC_OK;
+
+  CProgramConfig *pce;
+  HANDLE_FDK_BITSTREAM bs = transportDec_GetBitstream(self->hInput, 0);
+
+  MP4_ELEMENT_ID type = ID_NONE;            /* Current element type */
+  INT aacChannels=0;                        /* Channel counter for channels found in the bitstream */
+
+  INT auStartAnchor = (INT)FDKgetValidBits(bs);  /* AU start bit buffer position for AU byte alignment */
+
+  self->frameOK = 1;
+
+  /* Any supported base layer valid AU will require more than 16 bits. */
+  if ( (transportDec_GetAuBitsRemaining(self->hInput, 0) < 15) && (flags & (AACDEC_CONCEAL|AACDEC_FLUSH)) == 0) {
+    self->frameOK = 0;
+    ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
+  }
+
+
+  /* Reset Program Config structure */
+  pce = &self->pce;
+  CProgramConfig_Reset(pce);
+
+  CAacDecoder_AncDataReset(&self->ancData);
+
+  {
+    int ch;
+
+    if (self->streamInfo.channelConfig == 0) {
+      /* Init Channel/Element mapping table */
+      for (ch=0; ch<(6); ch++) {
+        self->chMapping[ch] = 255;
+      }
+      if (!CProgramConfig_IsValid(pce)) {
+        int el;
+        for (el=0; el<7; el++) {
+          self->elements[el] = ID_NONE;
+        }
+      }
+    }
+  }
+
+  /* Check sampling frequency  */
+  switch ( self->streamInfo.aacSampleRate ) {
+    case 16000:
+    case 12000:
+   case 11025:
+   case  8000:
+    case  7350:
+    case 48000:
+    case 44100:
+    case 32000:
+    case 24000:
+    case 22050:
+      break;
+    default:
+      if ( ! (self->flags & (AC_USAC|AC_RSVD50)) ) {
+        return AAC_DEC_UNSUPPORTED_SAMPLINGRATE;
+      }
+      break;
+  }
+
+
+  if ( flags & AACDEC_CLRHIST )
+  {
+    int ch;
+    /* Clear history */
+    for (ch = 0; ch < self->aacChannels; ch++) {
+      /* Reset concealment */
+      CConcealment_InitChannelData(&self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo,
+                                   &self->concealCommonData,
+                                    self->streamInfo.aacSamplesPerFrame );
+      /* Clear concealment buffers to get rid of the complete history */
+      FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo.spectralCoefficient, 1024 * sizeof(FIXP_CNCL));
+      FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo.specScale, 8 * sizeof(SHORT));
+      /* Clear overlap-add buffers to avoid clicks. */
+      FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->IMdct.overlap.freq, OverlapBufferSize*sizeof(FIXP_DBL));
+     }
+  }
+
+
+
+#ifdef TP_PCE_ENABLE
+  int pceRead = 0;                          /* Flag indicating a PCE in the current raw_data_block() */
+#endif
+
+
+  INT hdaacDecoded = 0;
+  MP4_ELEMENT_ID previous_element = ID_END; /* Last element ID (required for extension payload mapping */
+  UCHAR previous_element_index = 0;         /* Canonical index of last element */
+  int element_count = 0;                    /* Element counter for elements found in the bitstream */
+  int el_cnt[ID_LAST] = { 0 };              /* element counter ( robustness ) */
+
+  while ( (type != ID_END) && (! (flags & (AACDEC_CONCEAL | AACDEC_FLUSH))) && self->frameOK )
+  {
+    int el_channels;
+
+    if (! (self->flags & (AC_USAC|AC_RSVD50|AC_ELD|AC_SCALABLE|AC_ER)))
+      type = (MP4_ELEMENT_ID) FDKreadBits(bs,3);
+    else 
+      type = self->elements[element_count];
+
+    setHcrType(&self->aacCommonData.overlay.aac.erHcrInfo, type);
+
+
+    if ((INT)FDKgetValidBits(bs) < 0)
+      self->frameOK = 0;
+
+    switch (type)
+    {
+      case ID_SCE:
+      case ID_CPE:
+      case ID_LFE:
+        /*
+          Consistency check
+        */
+
+        if (type == ID_CPE) {
+          el_channels = 2;
+        } else {
+          el_channels = 1;
+        }
+
+        if ( (el_cnt[type] >= (self->ascChannels>>(el_channels-1))) || (aacChannels > (self->ascChannels-el_channels)) ) {
+          ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
+          self->frameOK = 0;
+          break;
+        }
+
+        if ( !(self->flags & (AC_USAC|AC_RSVD50)) ) {
+          int ch;
+          for (ch=0; ch < el_channels; ch+=1) {
+            CPns_ResetData(&self->pAacDecoderChannelInfo[aacChannels+ch]->data.aac.PnsData,
+                           &self->pAacDecoderChannelInfo[aacChannels+ch]->pComData->pnsInterChannelData);
+          }
+        }
+
+        if(self->frameOK) {
+          ErrorStatus = CChannelElement_Read( bs,
+                                             &self->pAacDecoderChannelInfo[aacChannels],
+                                             &self->pAacDecoderStaticChannelInfo[aacChannels],
+                                              self->streamInfo.aot,
+                                             &self->samplingRateInfo,
+                                              self->flags,
+                                              self->streamInfo.aacSamplesPerFrame,
+                                              el_channels,
+                                              self->streamInfo.epConfig,
+                                              self->hInput
+                                              );
+          if (ErrorStatus) {
+            self->frameOK = 0;
+          }
+        }
+
+
+        if ( self->frameOK) {
+          /* Lookup the element and decode it only if it belongs to the current program */
+          if ( CProgramConfig_LookupElement(
+                  pce,
+                  self->streamInfo.channelConfig,
+                  self->pAacDecoderChannelInfo[aacChannels]->ElementInstanceTag,
+                  aacChannels,
+                  self->chMapping,
+                  self->channelType,
+                  self->channelIndices,
+                 &previous_element_index,
+                  self->elements,
+                  type) )
+          {
+            if ( !hdaacDecoded ) {
+              CChannelElement_Decode(
+                     &self->pAacDecoderChannelInfo[aacChannels],
+                     &self->pAacDecoderStaticChannelInfo[aacChannels],
+                     &self->samplingRateInfo,
+                      self->flags,
+                      el_channels
+                      );
+            }
+            aacChannels += 1;
+            if (type == ID_CPE) {
+              aacChannels += 1;
+            }
+          }
+          else {
+            self->frameOK = 0;
+          }
+          /* Create SBR element for SBR for upsampling. */
+          if ( (type == ID_LFE)
+            && ( (self->flags & AC_SBR_PRESENT)
+              || (self->sbrEnabled == 1) ) )
+          {
+            SBR_ERROR sbrError;
+
+            sbrError = sbrDecoder_InitElement(
+                    self->hSbrDecoder,
+                    self->streamInfo.aacSampleRate,
+                    self->streamInfo.extSamplingRate,
+                    self->streamInfo.aacSamplesPerFrame,
+                    self->streamInfo.aot,
+                    ID_LFE,
+                    previous_element_index
+                    );
+            if (sbrError != SBRDEC_OK) {
+              /* Do not try to apply SBR because initializing the element failed. */
+              self->sbrEnabled = 0;
+            }
+          }
+        }
+
+        el_cnt[type]++;
+        break;
+
+      case ID_CCE:
+        /*
+          Consistency check
+        */
+        if ( el_cnt[type] > self->ascChannels ) {
+          ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
+          self->frameOK = 0;
+          break;
+        }
+
+        if (self->frameOK)
+        {
+          /* memory for spectral lines temporal on scratch */
+          C_ALLOC_SCRATCH_START(mdctSpec, FIXP_DBL, 1024);
+
+          /* create dummy channel for CCE parsing on stack */
+          CAacDecoderChannelInfo  tmpAacDecoderChannelInfo, *pTmpAacDecoderChannelInfo;
+
+          FDKmemclear(mdctSpec, 1024*sizeof(FIXP_DBL));
+
+          tmpAacDecoderChannelInfo.pDynData =   self->aacCommonData.workBufferCore1->pAacDecoderDynamicData;
+          tmpAacDecoderChannelInfo.pComData =  &self->aacCommonData;
+          tmpAacDecoderChannelInfo.pSpectralCoefficient  = (SPECTRAL_PTR)mdctSpec;
+          /* Assume AAC-LC */
+          tmpAacDecoderChannelInfo.granuleLength = self->streamInfo.aacSamplesPerFrame / 8;
+
+          /* Reset PNS data. */
+          CPns_ResetData(&tmpAacDecoderChannelInfo.data.aac.PnsData, &tmpAacDecoderChannelInfo.pComData->pnsInterChannelData);
+
+          pTmpAacDecoderChannelInfo = &tmpAacDecoderChannelInfo;
+          /* do CCE parsing */
+          ErrorStatus = CChannelElement_Read( bs,
+                                             &pTmpAacDecoderChannelInfo,
+                                              NULL,
+                                              self->streamInfo.aot,
+                                             &self->samplingRateInfo,
+                                              self->flags,
+                                              self->streamInfo.aacSamplesPerFrame,
+                                              1,
+                                              self->streamInfo.epConfig,
+                                              self->hInput
+                                             );
+
+          C_ALLOC_SCRATCH_END(mdctSpec, FIXP_DBL, 1024);
+
+          if (ErrorStatus) {
+            self->frameOK = 0;
+          }
+
+          if (self->frameOK) {
+            /* Lookup the element and decode it only if it belongs to the current program */
+            if (CProgramConfig_LookupElement(
+                    pce,
+                    self->streamInfo.channelConfig,
+                    pTmpAacDecoderChannelInfo->ElementInstanceTag,
+                    0,
+                    self->chMapping,
+                    self->channelType,
+                    self->channelIndices,
+                   &previous_element_index,
+                    self->elements,
+                    type) )
+            {
+              /* decoding of CCE not supported */
+            }
+            else {
+              self->frameOK = 0;
+            }
+          }
+        }
+        el_cnt[type]++;
+        break;
+
+      case ID_DSE:
+        {
+          UCHAR element_instance_tag;
+
+          CDataStreamElement_Read( bs,
+                                  &self->ancData,
+                                   self->hDrcInfo,
+                                   self->hInput,
+                                  &element_instance_tag,
+                                   auStartAnchor );
+
+          if (!CProgramConfig_LookupElement(
+                   pce,
+                   self->streamInfo.channelConfig,
+                   element_instance_tag,
+                   0,
+                   self->chMapping,
+                   self->channelType,
+                   self->channelIndices,
+                  &previous_element_index,
+                   self->elements,
+                   type) )
+          {
+            /* most likely an error in bitstream occured */
+            //self->frameOK = 0;
+          }
+        }
+
+#if defined(PCM_POSTPROCESS_ENABLE) && defined(DVB_MIXDOWN_ENABLE) && defined(AACDEC_DVB_SUPPORT_ENABLE)
+        {
+          UCHAR *pDvbAncData = NULL;
+          AAC_DECODER_ERROR ancErr;
+          int ancIndex;
+          int dvbAncDataSize = 0;
+
+          /* Ask how many anc data elements are in buffer */
+          ancIndex = self->ancData.nrElements - 1;
+          /* Get the last one (if available) */
+          ancErr   = CAacDecoder_AncDataGet( &self->ancData,
+                                              ancIndex,
+                                             &pDvbAncData,
+                                             &dvbAncDataSize );
+
+          if (ancErr == AAC_DEC_OK) {
+            pcmDmx_ReadDvbAncData (
+                  self->hPcmUtils,
+                  pDvbAncData,
+                  dvbAncDataSize,
+                  0 /* not mpeg2 */ );
+          }
+        }
+#endif /* PCM_POSTPROCESS_ENABLE && DVB_MIXDOWN_ENABLE && AACDEC_DVB_SUPPORT_ENABLE */
+        break;
+
+#ifdef TP_PCE_ENABLE
+      case ID_PCE:
+
+        if ( CProgramConfigElement_Read( bs,
+                                    self->hInput,
+                                    pce,
+                                    auStartAnchor ) )
+        { /* Built element table */
+          int elIdx = CProgramConfig_GetElementTable(pce, self->elements);
+          /* Reset the remaining tabs */
+          for ( ; elIdx<7; elIdx++) {
+            self->elements[elIdx] = ID_NONE;
+          }
+          /* Make new number of channel persistant */
+          self->ascChannels = pce->NumChannels;
+          /* If PCE is not first element conceal this frame to avoid inconsistencies */
+          if ( element_count != 0 ) {
+            self->frameOK = 0;
+          }
+        }
+        pceRead = 1;
+        break;
+#endif /* TP_PCE_ENABLE */
+
+      case ID_FIL:
+        {
+          int bitCnt = FDKreadBits(bs,4);           /* bs_count */
+
+          if (bitCnt == 15)
+          {
+            int esc_count = FDKreadBits(bs,8);     /* bs_esc_count */
+            bitCnt =  esc_count + 14;
+          }
+
+          /* Convert to bits */
+          bitCnt <<= 3;
+
+          while (bitCnt > 0) {
+            ErrorStatus = CAacDecoder_ExtPayloadParse(self, bs, &bitCnt, previous_element, previous_element_index, 1);
+            if (ErrorStatus != AAC_DEC_OK) {
+              self->frameOK = 0;
+              break;
+            }
+          }
+        }
+        break;
+
+      case ID_EXT:
+        {
+          INT bitCnt = 0;
+
+          /* get the remaining bits of this frame */
+          bitCnt = transportDec_GetAuBitsRemaining(self->hInput, 0);
+
+          if ( (bitCnt > 0) && (self->flags & AC_SBR_PRESENT) && (self->flags & (AC_USAC|AC_RSVD50|AC_ELD)) )
+          {
+            SBR_ERROR err;
+            int  elIdx, numChElements = el_cnt[ID_SCE] + el_cnt[ID_CPE];
+
+            for (elIdx = 0; elIdx < numChElements; elIdx += 1)
+            {
+              err = sbrDecoder_Parse (
+                    self->hSbrDecoder,
+                    bs,
+                   &bitCnt,
+                    -1,
+                    self->flags & AC_SBRCRC,
+                    self->elements[elIdx],
+                    elIdx,
+                    self->flags & AC_INDEP );
+
+              if (err != SBRDEC_OK) {
+                break;
+              }
+            }
+            if (err == SBRDEC_OK) {
+              self->sbrEnabled = 1;
+            } else {
+              self->frameOK = 0;
+            }
+          }
+
+
+          if ( ! (self->flags & (AC_USAC|AC_RSVD50|AC_DRM)) )
+          {
+            while ( bitCnt > 7 ) {
+              ErrorStatus = CAacDecoder_ExtPayloadParse(self, bs, &bitCnt, previous_element, previous_element_index, 0);
+              if (ErrorStatus != AAC_DEC_OK) {
+                self->frameOK = 0;
+                ErrorStatus = AAC_DEC_PARSE_ERROR;
+                break;
+              }
+            }
+          }
+        }
+        break;
+
+      case ID_END:
+        break;
+
+      default:
+        ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
+        self->frameOK = 0;
+        break;
+    }
+
+    previous_element = type;
+    element_count++;
+
+  }   /* while ( (type != ID_END) ... ) */
+
+  if ( !(flags & (AACDEC_CONCEAL|AACDEC_FLUSH)) )
+  {
+    /* Byte alignment with respect to the first bit of the raw_data_block(). */
+    {
+      FDKbyteAlign(bs, auStartAnchor);
+    }
+
+    /* Check if all bits of the raw_data_block() have been read. */
+    if ( transportDec_GetAuBitsTotal(self->hInput, 0) > 0 ) {
+      INT unreadBits = transportDec_GetAuBitsRemaining(self->hInput, 0);
+      if ( unreadBits != 0 ) {
+
+        self->frameOK = 0;
+        /* Do not overwrite current error */
+        if (ErrorStatus == AAC_DEC_OK && self->frameOK == 0) {
+          ErrorStatus = AAC_DEC_PARSE_ERROR;
+        }
+        /* Always put the bitbuffer at the right position after the current Access Unit. */
+        FDKpushBiDirectional(bs, unreadBits);
+      }
+    }
+
+    /* Check the last element. The terminator (ID_END) has to be the last one (even if ER syntax is used). */
+    if ( self->frameOK && type != ID_END ) {
+      /* Do not overwrite current error */
+      if (ErrorStatus == AAC_DEC_OK) {
+        ErrorStatus = AAC_DEC_PARSE_ERROR;
+      }
+      self->frameOK = 0;
+    }
+  }
+
+  /* More AAC channels than specified by the ASC not allowed. */
+  if ( (aacChannels == 0 || aacChannels > self->aacChannels) && !(flags & (AACDEC_CONCEAL|AACDEC_FLUSH)) ) {
+    {
+      /* Do not overwrite current error */
+      if (ErrorStatus == AAC_DEC_OK) {
+        ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
+      }
+      self->frameOK = 0;
+    }
+    aacChannels = 0;
+  }
+  else if ( aacChannels > self->ascChannels ) {
+    /* Do not overwrite current error */
+    if (ErrorStatus == AAC_DEC_OK) {
+      ErrorStatus = AAC_DEC_UNSUPPORTED_FORMAT;
+    }
+    self->frameOK = 0;
+    aacChannels = 0;
+  }
+
+  if ( TRANSPORTDEC_OK != transportDec_CrcCheck(self->hInput) )
+  {
+    self->frameOK=0;
+  }
+
+  /* store or restore the number of channels */
+  if ( self->frameOK && !(flags &(AACDEC_CONCEAL|AACDEC_FLUSH)) ) {
+    self->concealChannels = aacChannels;  /* store */
+    self->sbrEnabledPrev = self->sbrEnabled;
+  } else {
+    if (self->aacChannels > 0) {
+      aacChannels = self->concealChannels;  /* restore */
+      self->sbrEnabled = self->sbrEnabledPrev;
+     }
+  }
+
+  /* Update number of output channels */
+  self->streamInfo.numChannels = aacChannels;
+
+#if defined(TP_PCE_ENABLE) && defined(PCM_POSTPROCESS_ENABLE) && defined(MPEG_PCE_MIXDOWN_ENABLE)
+  if (pceRead == 1 || CProgramConfig_IsValid(pce)) {
+    /* Set matrix mixdown infos if available from PCE. */
+    pcmDmx_SetMatrixMixdownFromPce ( self->hPcmUtils,
+                                     pce->MatrixMixdownIndexPresent,
+                                     pce->MatrixMixdownIndex,
+                                     pce->PseudoSurroundEnable );
+  }
+#endif
+
+  /* If there is no valid data to transfrom into time domain, return. */
+  if ( ! IS_OUTPUT_VALID(ErrorStatus) ) {
+    return ErrorStatus;
+  }
+
+  /*
+    Inverse transform
+  */
+  {
+    int stride, offset, c;
+
+    /* Extract DRC control data and map it to channels (without bitstream delay) */
+    aacDecoder_drcProlog (
+            self->hDrcInfo,
+            bs,
+            self->pAacDecoderStaticChannelInfo,
+            self->pce.ElementInstanceTag,
+            self->chMapping,
+            aacChannels
+          );
+
+    /* "c" iterates in canonical MPEG channel order */
+    for (c=0; c < aacChannels; c++)
+    {
+      CAacDecoderChannelInfo *pAacDecoderChannelInfo;
+
+      /* Select correct pAacDecoderChannelInfo for current channel */
+      if (self->chMapping[c] >= aacChannels) {
+        pAacDecoderChannelInfo = self->pAacDecoderChannelInfo[c];
+      } else {
+        pAacDecoderChannelInfo = self->pAacDecoderChannelInfo[self->chMapping[c]];
+      }
+
+      /* Setup offset and stride for time buffer traversal. */
+      if (interleaved) {
+        stride = aacChannels;
+        offset = self->channelOutputMapping[aacChannels-1][c];
+      } else {
+        stride = 1;
+        offset = self->channelOutputMapping[aacChannels-1][c] * self->streamInfo.aacSamplesPerFrame;
+      }
+
+
+      /*
+        Conceal defective spectral data
+      */
+      CConcealment_Apply(&self->pAacDecoderStaticChannelInfo[c]->concealmentInfo,
+                          pAacDecoderChannelInfo,
+                          self->pAacDecoderStaticChannelInfo[c],
+                         &self->samplingRateInfo,
+                          self->streamInfo.aacSamplesPerFrame,
+                          0,
+                          (self->frameOK && !(flags&AACDEC_CONCEAL)),
+                          self->flags
+                        );
+
+
+      if (flags & (AACDEC_INTR|AACDEC_CLRHIST)) {
+        /* Reset DRC control data for this channel */
+        aacDecoder_drcInitChannelData ( &self->pAacDecoderStaticChannelInfo[c]->drcData );
+      }
+      /* DRC processing */
+      aacDecoder_drcApply (
+              self->hDrcInfo,
+              self->hSbrDecoder,
+              pAacDecoderChannelInfo,
+             &self->pAacDecoderStaticChannelInfo[c]->drcData,
+              c,
+              self->streamInfo.aacSamplesPerFrame,
+              self->sbrEnabled
+            );
+
+      if ( flags&AACDEC_FLUSH ) {
+        FDKmemclear(pAacDecoderChannelInfo->pSpectralCoefficient, sizeof(FIXP_DBL)*self->streamInfo.aacSamplesPerFrame);
+      }
+
+      switch (pAacDecoderChannelInfo->renderMode)
+      {
+        case AACDEC_RENDER_IMDCT:
+          CBlock_FrequencyToTime(
+                  self->pAacDecoderStaticChannelInfo[c],
+                  pAacDecoderChannelInfo,
+                  pTimeData + offset,
+                  self->streamInfo.aacSamplesPerFrame,
+                  stride,
+                  (self->frameOK && !(flags&AACDEC_CONCEAL)),
+                  self->aacCommonData.workBufferCore1->mdctOutTemp
+                  );
+          break;
+        case AACDEC_RENDER_ELDFB:
+          CBlock_FrequencyToTimeLowDelay(
+                  self->pAacDecoderStaticChannelInfo[c],
+                  pAacDecoderChannelInfo,
+                  pTimeData + offset,
+                  self->streamInfo.aacSamplesPerFrame,
+                  stride
+                  );
+          break;
+        default:
+          ErrorStatus = AAC_DEC_UNKNOWN;
+          break;
+      }
+      if ( flags&AACDEC_FLUSH ) {
+        FDKmemclear(self->pAacDecoderStaticChannelInfo[c]->pOverlapBuffer, OverlapBufferSize*sizeof(FIXP_DBL));
+      }
+    }
+
+
+    /* Extract DRC control data and map it to channels (with bitstream delay) */
+    aacDecoder_drcEpilog (
+            self->hDrcInfo,
+            bs,
+            self->pAacDecoderStaticChannelInfo,
+            self->pce.ElementInstanceTag,
+            self->chMapping,
+            aacChannels
+          );
+  }
+
+
+  /* Reorder channel type information tables.  */
+  {
+    AUDIO_CHANNEL_TYPE types[(6)];
+    UCHAR idx[(6)];
+    int c;
+
+    FDK_ASSERT(sizeof(self->channelType) == sizeof(types));
+    FDK_ASSERT(sizeof(self->channelIndices) == sizeof(idx));
+
+    FDKmemcpy(types, self->channelType, sizeof(types));
+    FDKmemcpy(idx, self->channelIndices, sizeof(idx));
+
+    for (c=0; c<aacChannels; c++) {
+      self->channelType[self->channelOutputMapping[aacChannels-1][c]] = types[c];
+      self->channelIndices[self->channelOutputMapping[aacChannels-1][c]] = idx[c];
+    }
+  }
+
+  self->blockNumber++;
+
+  return ErrorStatus;
+}
+
+/*!
+  \brief returns the streaminfo pointer
+
+  The function hands back a pointer to the streaminfo structure
+
+  \return pointer to the struct
+*/
+LINKSPEC_CPP CStreamInfo* CAacDecoder_GetStreamInfo ( HANDLE_AACDECODER self )
+{
+  if (!self) {
+    return NULL;
+  }
+  return &self->streamInfo;
+}
+
+
+
+