Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 867 insertions, 0 deletions

diff --git a/libMpegTPDec/src/tpdec_asc.cpp b/libMpegTPDec/src/tpdec_asc.cpp
new file mode 100644
index 0000000..ee7c7cf
--- /dev/null
+++ b/libMpegTPDec/src/tpdec_asc.cpp
@@ -0,0 +1,867 @@
+/*****************************  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):   Daniel Homm
+   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.
+
+******************************************************************************/
+
+#include "tpdec_lib.h"
+#include "tp_data.h"
+
+
+void CProgramConfig_Reset(CProgramConfig *pPce)
+{
+  pPce->elCounter = 0;
+}
+
+void CProgramConfig_Init(CProgramConfig *pPce)
+{
+  FDKmemclear(pPce, sizeof(CProgramConfig));
+#ifdef TP_PCE_ENABLE
+  pPce->SamplingFrequencyIndex = 0xf;
+#endif
+}
+
+int  CProgramConfig_IsValid ( const CProgramConfig *pPce )
+{
+  return ( (pPce->isValid) ? 1 : 0);
+}
+
+#ifdef TP_PCE_ENABLE
+void CProgramConfig_Read(
+                          CProgramConfig *pPce,
+                          HANDLE_FDK_BITSTREAM bs,
+                          UINT alignmentAnchor
+                        )
+{
+  int i;
+
+  pPce->NumEffectiveChannels = 0;
+  pPce->NumChannels = 0;
+  pPce->ElementInstanceTag = (UCHAR) FDKreadBits(bs,4);
+  pPce->Profile = (UCHAR) FDKreadBits(bs,2);
+  pPce->SamplingFrequencyIndex = (UCHAR) FDKreadBits(bs,4);
+  pPce->NumFrontChannelElements = (UCHAR) FDKreadBits(bs,4);
+  pPce->NumSideChannelElements = (UCHAR) FDKreadBits(bs,4);
+  pPce->NumBackChannelElements = (UCHAR) FDKreadBits(bs,4);
+  pPce->NumLfeChannelElements = (UCHAR) FDKreadBits(bs,2);
+  pPce->NumAssocDataElements = (UCHAR) FDKreadBits(bs,3);
+  pPce->NumValidCcElements = (UCHAR) FDKreadBits(bs,4);
+
+  if ((pPce->MonoMixdownPresent = (UCHAR) FDKreadBits(bs,1)) != 0)
+  {
+    pPce->MonoMixdownElementNumber = (UCHAR) FDKreadBits(bs,4);
+  }
+
+  if ((pPce->StereoMixdownPresent = (UCHAR) FDKreadBits(bs,1)) != 0)
+  {
+    pPce->StereoMixdownElementNumber = (UCHAR) FDKreadBits(bs,4);
+  }
+
+  if ((pPce->MatrixMixdownIndexPresent = (UCHAR) FDKreadBits(bs,1)) != 0)
+  {
+    pPce->MatrixMixdownIndex = (UCHAR) FDKreadBits(bs,2);
+    pPce->PseudoSurroundEnable = (UCHAR) FDKreadBits(bs,1);
+  }
+
+  for (i=0; i < pPce->NumFrontChannelElements; i++)
+  {
+    pPce->FrontElementIsCpe[i] = (UCHAR) FDKreadBits(bs,1);
+    pPce->FrontElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+    pPce->NumChannels += pPce->FrontElementIsCpe[i] ? 2 : 1;
+  }
+
+  for (i=0; i < pPce->NumSideChannelElements; i++)
+  {
+    pPce->SideElementIsCpe[i] = (UCHAR) FDKreadBits(bs,1);
+    pPce->SideElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+    pPce->NumChannels += pPce->SideElementIsCpe[i] ? 2 : 1;
+  }
+
+  for (i=0; i < pPce->NumBackChannelElements; i++)
+  {
+    pPce->BackElementIsCpe[i] = (UCHAR) FDKreadBits(bs,1);
+    pPce->BackElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+    pPce->NumChannels += pPce->BackElementIsCpe[i] ? 2 : 1;
+  }
+
+  pPce->NumEffectiveChannels = pPce->NumChannels;
+
+  for (i=0; i < pPce->NumLfeChannelElements; i++)
+  {
+    pPce->LfeElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+    pPce->NumChannels += 1;
+  }
+
+  for (i=0; i < pPce->NumAssocDataElements; i++)
+  {
+    pPce->AssocDataElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+  }
+
+  for (i=0; i < pPce->NumValidCcElements; i++)
+  {
+    pPce->CcElementIsIndSw[i] = (UCHAR) FDKreadBits(bs,1);
+    pPce->ValidCcElementTagSelect[i] = (UCHAR) FDKreadBits(bs,4);
+  }
+
+  FDKbyteAlign(bs, alignmentAnchor);
+
+  pPce->CommentFieldBytes = (UCHAR) FDKreadBits(bs,8);
+
+  for (i=0; i < pPce->CommentFieldBytes; i++)
+  {
+    UCHAR text;
+
+    text = (UCHAR)FDKreadBits(bs,8);
+
+    if (i < PC_COMMENTLENGTH)
+    {
+      pPce->Comment[i] = text;
+    }
+  }
+
+  pPce->isValid = 1;
+}
+#endif /* TP_PCE_ENABLE */
+
+/**
+ * \brief get implicit audio channel type for given channelConfig and MPEG ordered channel index
+ * \param channelConfig MPEG channelConfiguration from 1 upto 7
+ * \param index MPEG channel order index
+ * \return audio channel type.
+ */
+void getImplicitAudioChannelTypeAndIndex(
+        AUDIO_CHANNEL_TYPE *chType,
+        UCHAR *chIndex,
+        UINT channelConfig,
+        UINT index
+        )
+{
+  if (index < 3) {
+    *chType = ACT_FRONT;
+    *chIndex = index;
+  } else {
+    switch (channelConfig) {
+      case MODE_1_2_1:
+      case MODE_1_2_2:
+      case MODE_1_2_2_1:
+        switch (index) {
+          case 3:
+          case 4:
+            *chType = ACT_BACK;
+            *chIndex = index - 3;
+            break;
+          case 5:
+            *chType = ACT_LFE;
+            *chIndex = 0;
+            break;
+        }
+        break;
+      case MODE_1_2_2_2_1:
+        switch (index) {
+          case 3:
+          case 4:
+            *chType = ACT_SIDE;
+            *chIndex = index - 3;
+            break;
+          case 5:
+          case 6:
+            *chType = ACT_BACK;
+            *chIndex = index - 5;
+            break;
+          case 7:
+            *chType = ACT_LFE;
+            *chIndex = 0;
+            break;
+        }
+        break;
+      default:
+        *chType = ACT_NONE;
+        break;
+    }
+  }
+}
+
+int CProgramConfig_LookupElement(
+        CProgramConfig *pPce,
+        const UINT      channelConfig,
+        const UINT      tag,
+        const UINT      channelIdx,
+        UCHAR           chMapping[],
+        AUDIO_CHANNEL_TYPE chType[],
+        UCHAR           chIndex[],
+        UCHAR          *elMapping,
+        MP4_ELEMENT_ID  elList[],
+        MP4_ELEMENT_ID  elType
+       )
+{
+  if (channelConfig > 0)
+  {
+    /* Constant channel mapping must have
+       been set during initialization. */
+    if ( elType == ID_SCE
+      || elType == ID_CPE
+      || elType == ID_LFE )
+    {
+      *elMapping = pPce->elCounter;
+      if (elList[pPce->elCounter] != elType) {
+        /* Not in the list */
+        return 0;
+      }
+      /* Assume all front channels */
+      getImplicitAudioChannelTypeAndIndex(&chType[channelIdx], &chIndex[channelIdx], channelConfig, channelIdx);
+      if (elType == ID_CPE) {
+        chType[channelIdx+1] = chType[channelIdx];
+        chIndex[channelIdx+1] = chIndex[channelIdx]+1;
+      }
+      pPce->elCounter++;
+    }
+    /* Accept all non-channel elements, too. */
+    return 1;
+  }
+  else
+  {
+#ifdef TP_PCE_ENABLE
+    if (!pPce->isValid)
+#endif /* TP_PCE_ENABLE */
+    {
+      /* Implicit channel mapping. */
+      if ( elType == ID_SCE
+        || elType == ID_CPE
+        || elType == ID_LFE )
+      {
+        /* Store all channel element IDs */
+        elList[pPce->elCounter] = elType;
+        *elMapping = pPce->elCounter++;
+      }
+    }
+#ifdef  TP_PCE_ENABLE
+    else {
+      /* Accept the additional channel(s), only if the tag is in the lists */
+      int isCpe = 0, i;
+      int cc = 0, fc = 0, sc = 0, bc = 0, lc = 0, ec = 0; /* Channel and element counters */
+
+      switch (elType)
+      {
+      case ID_CPE:
+        isCpe = 1;
+      case ID_SCE:
+        /* search in front channels */
+        for (i = 0; i < pPce->NumFrontChannelElements; i++) {
+          if (isCpe == pPce->FrontElementIsCpe[i] && pPce->FrontElementTagSelect[i] == tag) {
+            chMapping[cc] = channelIdx;
+            chType[cc] = ACT_FRONT;
+            chIndex[cc] = fc;
+            if (isCpe) {
+              chMapping[cc+1] = channelIdx+1;
+              chType[cc+1] = ACT_FRONT;
+              chIndex[cc+1] = fc+1;
+            }
+            *elMapping = ec;
+            return 1;
+          }
+          ec++;
+          if (pPce->FrontElementIsCpe[i]) {
+            cc+=2; fc+=2;
+          } else {
+            cc++; fc++;
+          }
+        }
+        /* search in side channels */
+        for (i = 0; i < pPce->NumSideChannelElements; i++) {
+          if (isCpe == pPce->SideElementIsCpe[i] && pPce->SideElementTagSelect[i] == tag) {
+            chMapping[cc] = channelIdx;
+            chType[cc] = ACT_SIDE;
+            chIndex[cc] = sc;
+            if (isCpe) {
+              chMapping[cc+1] = channelIdx+1;
+              chType[cc+1] = ACT_SIDE;
+              chIndex[cc+1] = sc+1;
+            }
+            *elMapping = ec;
+            return 1;
+          }
+          ec++;
+          if (pPce->SideElementIsCpe[i]) {
+            cc+=2; sc+=2;
+          } else {
+            cc++; sc++;
+          }
+        }
+        /* search in back channels */
+        for (i = 0; i < pPce->NumBackChannelElements; i++) {
+          if (isCpe == pPce->BackElementIsCpe[i] && pPce->BackElementTagSelect[i] == tag) {
+            chMapping[cc] = channelIdx;
+            chType[cc] = ACT_BACK;
+            chIndex[cc] = bc;
+            if (isCpe) {
+              chMapping[cc+1] = channelIdx+1;
+              chType[cc+1] = ACT_BACK;
+              chIndex[cc+1] = bc+1;
+            }
+            *elMapping = ec;
+            return 1;
+          }
+          ec++;
+          if (pPce->BackElementIsCpe[i]) {
+            cc+=2; bc+=2;
+          } else {
+            cc++; bc++;
+          }
+        }
+        break;
+
+      case ID_LFE:
+        /* Initialize channel counter and element counter */
+        cc = pPce->NumEffectiveChannels;
+        ec = pPce->NumFrontChannelElements+ pPce->NumSideChannelElements + pPce->NumBackChannelElements;
+        /* search in lfe channels */
+        for (i = 0; i < pPce->NumLfeChannelElements; i++) {
+          if ( pPce->LfeElementTagSelect[i] == tag ) {
+            chMapping[cc] = channelIdx;
+            *elMapping = ec;
+            chType[cc] = ACT_LFE;
+            chIndex[cc] = lc;
+            return 1;
+          }
+          ec++;
+          cc++;
+          lc++;
+        }
+        break;
+
+      /* Non audio elements */
+      case ID_CCE:
+        /* search in cce channels */
+        for (i = 0; i < pPce->NumValidCcElements; i++) {
+          if (pPce->ValidCcElementTagSelect[i] == tag) {
+            return 1;
+          }
+        }
+        break;
+      case ID_DSE:
+        /* search associated data elements */
+        for (i = 0; i < pPce->NumAssocDataElements; i++) {
+          if (pPce->AssocDataElementTagSelect[i] == tag) {
+            return 1;
+          }
+        }
+        break;
+      default:
+        return 0;
+      }
+      return 0;  /* not found in any list */
+    }
+#endif /* TP_PCE_ENABLE */
+  }
+
+  return 1;
+}
+
+#ifdef  TP_PCE_ENABLE
+int CProgramConfig_GetElementTable(
+        const CProgramConfig *pPce,
+        MP4_ELEMENT_ID  elList[]
+       )
+{
+  int i, el = 0;
+
+  for (i=0; i < pPce->NumFrontChannelElements; i++)
+  {
+    elList[el++] = (pPce->FrontElementIsCpe[i]) ?  ID_CPE : ID_SCE;
+  }
+
+  for (i=0; i < pPce->NumSideChannelElements; i++)
+  {
+    elList[el++] = (pPce->SideElementIsCpe[i]) ?  ID_CPE : ID_SCE;
+  }
+
+  for (i=0; i < pPce->NumBackChannelElements; i++)
+  {
+    elList[el++] = (pPce->BackElementIsCpe[i]) ?  ID_CPE : ID_SCE;
+  }
+
+  for (i=0; i < pPce->NumLfeChannelElements; i++)
+  {
+    elList[el++] = ID_LFE;
+  }
+
+
+  return el;
+}
+#endif
+
+static AUDIO_OBJECT_TYPE getAOT(HANDLE_FDK_BITSTREAM bs)
+{
+  int tmp = 0;
+
+  tmp = FDKreadBits(bs,5);
+  if (tmp == AOT_ESCAPE) {
+    int tmp2 = FDKreadBits(bs,6);
+    tmp = 32 + tmp2;
+  }
+
+  return (AUDIO_OBJECT_TYPE)tmp;
+}
+
+static INT getSampleRate(HANDLE_FDK_BITSTREAM bs, UCHAR *index, int nBits)
+{
+  INT sampleRate;
+  int idx;
+
+  idx = FDKreadBits(bs, nBits);
+  if( idx == (1<<nBits)-1 ) {
+    if(FDKgetValidBits(bs) < 24) {
+      return 0;
+    }
+    sampleRate = FDKreadBits(bs,24);
+  } else {
+    sampleRate = SamplingRateTable[idx];
+  }
+
+  *index = idx;
+
+  return sampleRate;
+}
+
+#ifdef TP_GA_ENABLE
+static
+TRANSPORTDEC_ERROR GaSpecificConfig_Parse( CSGaSpecificConfig    *self,
+                                           CSAudioSpecificConfig *asc,
+                                           HANDLE_FDK_BITSTREAM   bs,
+                                           UINT                   ascStartAnchor )
+{
+  TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
+
+  self->m_frameLengthFlag = FDKreadBits(bs,1);
+
+  self->m_dependsOnCoreCoder = FDKreadBits(bs,1);
+
+  if( self->m_dependsOnCoreCoder )
+    self->m_coreCoderDelay = FDKreadBits(bs,14);
+
+  self->m_extensionFlag = FDKreadBits(bs,1);
+
+  if( asc->m_channelConfiguration == 0 ) {
+    CProgramConfig_Read(&asc->m_progrConfigElement, bs, ascStartAnchor);
+  }
+
+  if ((asc->m_aot == AOT_AAC_SCAL) || (asc->m_aot == AOT_ER_AAC_SCAL)) {
+    self->m_layer = FDKreadBits(bs,3);
+  }
+
+  if (self->m_extensionFlag) {
+    if (asc->m_aot == AOT_ER_BSAC) {
+      self->m_numOfSubFrame = FDKreadBits(bs,5);
+      self->m_layerLength   = FDKreadBits(bs,11);
+    }
+
+    if ((asc->m_aot == AOT_ER_AAC_LC)   || (asc->m_aot == AOT_ER_AAC_LTP)  ||
+        (asc->m_aot == AOT_ER_AAC_SCAL) || (asc->m_aot == AOT_ER_AAC_LD))
+    {
+      asc->m_vcb11Flag = FDKreadBits(bs,1); /* aacSectionDataResilienceFlag */
+      asc->m_rvlcFlag  = FDKreadBits(bs,1); /* aacScalefactorDataResilienceFlag */
+      asc->m_hcrFlag   = FDKreadBits(bs,1); /* aacSpectralDataResilienceFlag */
+    }
+
+    self->m_extensionFlag3 = FDKreadBits(bs,1);
+
+  }
+  return (ErrorStatus);
+}
+#endif /* TP_GA_ENABLE */
+
+
+
+
+
+#ifdef TP_ELD_ENABLE
+
+static INT ld_sbr_header( const CSAudioSpecificConfig *asc,
+                           HANDLE_FDK_BITSTREAM hBs, 
+                           CSTpCallBacks *cb )
+{
+  const int channelConfiguration = asc->m_channelConfiguration;
+  int i = 0;
+  INT error = 0;
+
+  if (channelConfiguration == 2) {
+    error = cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_CPE, i++);
+  } else {
+    error = cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_SCE, i++);
+  }
+
+  switch ( channelConfiguration ) {
+    case 5:
+      error |= cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_CPE, i++);
+    case 3:
+      error |= cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_CPE, i++);
+      break;
+
+    case 7:
+      error |= cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_SCE, i++);
+    case 6:
+      error |= cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_CPE, i++);
+    case 4:
+      error |= cb->cbSbr(cb->cbSbrData, hBs, asc->m_samplingFrequency, asc->m_extensionSamplingFrequency, asc->m_samplesPerFrame, AOT_ER_AAC_ELD, ID_CPE, i++);
+      break;
+  }
+
+  return error;
+}
+
+static
+TRANSPORTDEC_ERROR EldSpecificConfig_Parse(
+        CSAudioSpecificConfig *asc,
+        HANDLE_FDK_BITSTREAM hBs,
+        CSTpCallBacks *cb
+        )
+{
+  TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
+  CSEldSpecificConfig *esc = &asc->m_sc.m_eldSpecificConfig;
+  ASC_ELD_EXT_TYPE eldExtType;
+  int eldExtLen, len, cnt;
+
+  FDKmemclear(esc, sizeof(CSEldSpecificConfig));
+
+  esc->m_frameLengthFlag = FDKreadBits(hBs, 1 );
+  if (esc->m_frameLengthFlag) {
+    asc->m_samplesPerFrame = 480;
+  } else {
+    asc->m_samplesPerFrame = 512;
+  }
+
+  asc->m_vcb11Flag = FDKreadBits(hBs, 1 );
+  asc->m_rvlcFlag  = FDKreadBits(hBs, 1 );
+  asc->m_hcrFlag   = FDKreadBits(hBs, 1 );
+
+  esc->m_sbrPresentFlag     = FDKreadBits(hBs, 1 );
+
+  if (esc->m_sbrPresentFlag == 1) {
+    esc->m_sbrSamplingRate    = FDKreadBits(hBs, 1 ); /* 0: single rate, 1: dual rate */
+    esc->m_sbrCrcFlag         = FDKreadBits(hBs, 1 );
+
+    asc->m_extensionSamplingFrequency = asc->m_samplingFrequency << esc->m_sbrSamplingRate;
+
+    if (cb->cbSbr != NULL){
+      if ( 0 != ld_sbr_header(asc, hBs, cb) ) {
+        return TRANSPORTDEC_PARSE_ERROR;
+      }
+    }
+  }
+  esc->m_useLdQmfTimeAlign = 0;
+
+  /* new ELD syntax */
+  /* parse ExtTypeConfigData */
+  while ((eldExtType = (ASC_ELD_EXT_TYPE)FDKreadBits(hBs, 4 )) != ELDEXT_TERM) {
+    eldExtLen = len = FDKreadBits(hBs, 4 );
+    if ( len == 0xf ) {
+      len = FDKreadBits(hBs, 8 );
+      eldExtLen += len;
+
+      if ( len == 0xff ) {
+        len = FDKreadBits(hBs, 16 );
+        eldExtLen += len;
+      }
+    }
+
+    switch (eldExtType) {
+      case ELDEXT_LDSAC:
+        esc->m_useLdQmfTimeAlign = 1;
+        if (cb->cbSsc != NULL) {
+          ErrorStatus = (TRANSPORTDEC_ERROR)cb->cbSsc(
+                  cb->cbSscData,
+                  hBs,
+                  asc->m_aot,
+                  asc->m_samplingFrequency,
+                  1,  /* muxMode */
+                  len
+                  );
+        } else {
+          ErrorStatus = TRANSPORTDEC_UNSUPPORTED_FORMAT;
+        }
+        if (ErrorStatus != TRANSPORTDEC_OK) {
+          goto bail;
+        }
+        break;
+      default:
+        for(cnt=0; cnt<len; cnt++) {
+          FDKreadBits(hBs, 8 );
+        }
+        break;
+      /* add future eld extension configs here */
+    }
+  }
+bail:
+  return (ErrorStatus);
+}
+#endif /* TP_ELD_ENABLE */
+
+
+static
+TRANSPORTDEC_ERROR AudioSpecificConfig_ExtensionParse(CSAudioSpecificConfig *self, HANDLE_FDK_BITSTREAM bs, CSTpCallBacks *cb)
+{
+  TP_ASC_EXTENSION_ID  lastAscExt, ascExtId = ASCEXT_UNKOWN;
+  INT  bitsAvailable = (INT)FDKgetValidBits(bs);
+  
+  while (bitsAvailable >= 11)
+  {
+    lastAscExt = ascExtId;
+    ascExtId   = (TP_ASC_EXTENSION_ID)FDKreadBits(bs, 11);
+    bitsAvailable -= 11;
+
+    switch (ascExtId) {
+    case ASCEXT_SBR:    /* 0x2b7 */
+      if ( (self->m_extensionAudioObjectType != AOT_SBR) && (bitsAvailable >= 5) ) {
+        self->m_extensionAudioObjectType = getAOT(bs);
+
+        if ( (self->m_extensionAudioObjectType == AOT_SBR)
+          || (self->m_extensionAudioObjectType == AOT_ER_BSAC) )
+        { /* Get SBR extension configuration */
+          self->m_sbrPresentFlag = FDKreadBits(bs, 1);
+          bitsAvailable -= 1;
+
+          if ( self->m_sbrPresentFlag == 1 ) {
+            self->m_extensionSamplingFrequency = getSampleRate(bs, &self->m_extensionSamplingFrequencyIndex, 4);
+
+            if ((INT)self->m_extensionSamplingFrequency <= 0) {
+              return TRANSPORTDEC_PARSE_ERROR;
+            }
+          }
+          if ( self->m_extensionAudioObjectType == AOT_ER_BSAC ) {
+            self->m_extensionChannelConfiguration = FDKreadBits(bs, 4);
+            bitsAvailable -= 4;
+          }
+        }
+        /* Update counter because of variable length fields (AOT and sampling rate) */
+        bitsAvailable = (INT)FDKgetValidBits(bs);
+      }
+      break;
+    case ASCEXT_PS:     /* 0x548 */
+      if ( (lastAscExt == ASCEXT_SBR)
+        && (self->m_extensionAudioObjectType == AOT_SBR)
+        && (bitsAvailable > 0) )
+      { /* Get PS extension configuration */
+        self->m_psPresentFlag = FDKreadBits(bs, 1);
+        bitsAvailable -= 1;
+      }
+      break;
+    case ASCEXT_MPS:    /* 0x76a */
+      if ( self->m_extensionAudioObjectType == AOT_MPEGS )
+        break;
+    case ASCEXT_LDMPS:  /* 0x7cc */
+      if ( (ascExtId == ASCEXT_LDMPS)
+        && (self->m_extensionAudioObjectType == AOT_LD_MPEGS) )
+        break;
+      if (bitsAvailable >= 1)
+      {
+        bitsAvailable -= 1;
+        if ( FDKreadBits(bs, 1) ) {  /* self->m_mpsPresentFlag */
+          int sscLen = FDKreadBits(bs, 8);
+          bitsAvailable -= 8;
+          if (sscLen == 0xFF) {
+            sscLen += FDKreadBits(bs, 16);
+            bitsAvailable -= 16;
+          }
+          if (cb->cbSsc != NULL) {
+            cb->cbSsc(
+                    cb->cbSscData,
+                    bs,
+                    self->m_aot,
+                    self->m_samplingFrequency,
+                    1,
+                    sscLen
+                    );
+          } else
+            FDKpushFor(bs, sscLen);  /* Skip SSC to be able to read the next extension if there is one. */
+
+          bitsAvailable -= sscLen*8;
+        }
+      }
+      break;
+    default:
+      return TRANSPORTDEC_UNSUPPORTED_FORMAT;
+    }
+  }
+
+  return TRANSPORTDEC_OK;
+}
+
+/*
+ * API Functions
+ */
+
+void AudioSpecificConfig_Init(CSAudioSpecificConfig *asc)
+{
+  FDKmemclear(asc, sizeof(CSAudioSpecificConfig));
+
+  /* Init all values that should not be zero. */
+  asc->m_aot                    = AOT_NONE;
+  asc->m_samplingFrequencyIndex = 0xf;
+  asc->m_epConfig               = -1;
+  asc->m_extensionAudioObjectType        = AOT_NULL_OBJECT;
+#ifdef TP_PCE_ENABLE
+  CProgramConfig_Init(&asc->m_progrConfigElement);
+#endif
+}
+
+TRANSPORTDEC_ERROR AudioSpecificConfig_Parse(
+        CSAudioSpecificConfig *self,
+        HANDLE_FDK_BITSTREAM   bs,
+        int                    fExplicitBackwardCompatible,
+        CSTpCallBacks      *cb
+        )
+{
+  TRANSPORTDEC_ERROR ErrorStatus = TRANSPORTDEC_OK;
+  UINT ascStartAnchor = FDKgetValidBits(bs);
+  int frameLengthFlag = -1;
+
+  AudioSpecificConfig_Init(self);
+
+  self->m_aot = getAOT(bs);
+  self->m_samplingFrequency = getSampleRate(bs, &self->m_samplingFrequencyIndex, 4);
+  if (self->m_samplingFrequency <= 0) {
+    return TRANSPORTDEC_PARSE_ERROR;
+  }
+
+  self->m_channelConfiguration = FDKreadBits(bs,4);
+
+  /* SBR extension ( explicit non-backwards compatible mode ) */
+  self->m_sbrPresentFlag = 0;
+  self->m_psPresentFlag  = 0;
+
+  if ( self->m_aot == AOT_SBR || self->m_aot == AOT_PS ) {
+    self->m_extensionAudioObjectType = AOT_SBR;
+
+    self->m_sbrPresentFlag = 1;
+    if ( self->m_aot == AOT_PS ) {
+      self->m_psPresentFlag = 1;
+    }
+
+    self->m_extensionSamplingFrequency = getSampleRate(bs, &self->m_extensionSamplingFrequencyIndex, 4);
+    self->m_aot = getAOT(bs);
+
+  } else {
+    self->m_extensionAudioObjectType = AOT_NULL_OBJECT;
+  }
+
+  /* Parse whatever specific configs */
+  switch (self->m_aot)
+  {
+#ifdef TP_GA_ENABLE
+    case AOT_AAC_LC:
+    case AOT_ER_AAC_LC:
+    case AOT_ER_AAC_LD:
+    case AOT_ER_AAC_SCAL:
+    case AOT_ER_BSAC:
+      if ((ErrorStatus = GaSpecificConfig_Parse(&self->m_sc.m_gaSpecificConfig, self, bs, ascStartAnchor)) != TRANSPORTDEC_OK ) {
+        return (ErrorStatus);
+      }
+      frameLengthFlag = self->m_sc.m_gaSpecificConfig.m_frameLengthFlag;
+      break;
+#endif /* TP_GA_ENABLE */
+    case AOT_MPEGS:
+      if (cb->cbSsc != NULL) {
+        cb->cbSsc(
+                cb->cbSscData,
+                bs,
+                self->m_aot,
+                self->m_samplingFrequency,
+                1,
+                0  /* don't know the length */
+                );
+      } else {
+        return TRANSPORTDEC_UNSUPPORTED_FORMAT;
+      }
+      break;
+#ifdef TP_ELD_ENABLE
+    case AOT_ER_AAC_ELD:
+      if ((ErrorStatus = EldSpecificConfig_Parse(self, bs, cb)) != TRANSPORTDEC_OK ) {
+        return (ErrorStatus);
+      }
+      frameLengthFlag = self->m_sc.m_eldSpecificConfig.m_frameLengthFlag;
+      self->m_sbrPresentFlag = self->m_sc.m_eldSpecificConfig.m_sbrPresentFlag;
+      self->m_extensionSamplingFrequency = (self->m_sc.m_eldSpecificConfig.m_sbrSamplingRate+1) * self->m_samplingFrequency;
+      break;
+#endif /* TP_ELD_ENABLE */
+
+    default:
+      return TRANSPORTDEC_UNSUPPORTED_FORMAT;
+      break;
+  }
+
+  /* Frame length */
+  switch (self->m_aot)
+  {
+#if defined(TP_GA_ENABLE) || defined(TP_USAC_ENABLE)
+    case AOT_AAC_LC:
+    case AOT_ER_AAC_LC:
+    case AOT_ER_AAC_SCAL:
+    case AOT_ER_BSAC:
+    /*case AOT_USAC:*/
+      if (!frameLengthFlag)
+        self->m_samplesPerFrame = 1024;
+      else
+        self->m_samplesPerFrame = 960;
+      break;
+#endif /* TP_GA_ENABLE */
+#if defined(TP_GA_ENABLE)
+    case AOT_ER_AAC_LD:
+      if (!frameLengthFlag)
+        self->m_samplesPerFrame = 512;
+      else
+        self->m_samplesPerFrame = 480;
+      break;
+#endif /* defined(TP_GA_ENABLE) */
+    default:
+      break;
+  }
+
+  switch (self->m_aot)
+  {
+    case AOT_ER_AAC_LC:
+    case AOT_ER_AAC_LD:
+    case AOT_ER_AAC_ELD:
+    case AOT_ER_AAC_SCAL:
+    case AOT_ER_CELP:
+    case AOT_ER_HVXC:
+    case AOT_ER_BSAC:
+      self->m_epConfig = FDKreadBits(bs,2);
+
+      if (self->m_epConfig > 1) {
+        return TRANSPORTDEC_UNSUPPORTED_FORMAT; // EPCONFIG;
+      }
+      break;
+    default:
+      break;
+  }
+
+  if (fExplicitBackwardCompatible) {
+    ErrorStatus = AudioSpecificConfig_ExtensionParse(self, bs, cb);
+  }
+
+  return (ErrorStatus);
+}
+
+