Function ExpandBsBuffer

codec/decoder/core/src/decoder_core.cpp:648–700

}

int32_t ExpandBsBuffer (PWelsDecoderContext pCtx, const int kiSrcLen) {
  if (pCtx == NULL)
    return ERR_INFO_INVALID_PTR;
  int32_t iExpandStepShift = 1;
  int32_t iNewBuffLen = WELS_MAX ((kiSrcLen * MAX_BUFFERED_NUM), (pCtx->iMaxBsBufferSizeInByte << iExpandStepShift));
  //allocate new bs buffer
  CMemoryAlign* pMa = pCtx->pMemAlign;

  //Realloc sRawData
  uint8_t* pNewBsBuff = static_cast<uint8_t*> (pMa->WelsMallocz (iNewBuffLen, "pCtx->sRawData.pHead"));
  if (pNewBsBuff == NULL) {
    WelsLog (& (pCtx->sLogCtx), WELS_LOG_ERROR, "ExpandBsBuffer() Failed for malloc pNewBsBuff (%d)", iNewBuffLen);
    pCtx->iErrorCode |= dsOutOfMemory;
    return ERR_INFO_OUT_OF_MEMORY;
  }

  //Calculate and set the bs start and end position
  for (uint32_t i = 0; i <= pCtx->pAccessUnitList->uiActualUnitsNum; i++) {
    PBitStringAux pSliceBitsRead = &pCtx->pAccessUnitList->pNalUnitsList[i]->sNalData.sVclNal.sSliceBitsRead;
    pSliceBitsRead->pStartBuf = pSliceBitsRead->pStartBuf - pCtx->sRawData.pHead + pNewBsBuff;
    pSliceBitsRead->pEndBuf   = pSliceBitsRead->pEndBuf   - pCtx->sRawData.pHead + pNewBsBuff;
    pSliceBitsRead->pCurBuf   = pSliceBitsRead->pCurBuf   - pCtx->sRawData.pHead + pNewBsBuff;
  }

  //Copy current buffer status to new buffer
  memcpy (pNewBsBuff, pCtx->sRawData.pHead, pCtx->iMaxBsBufferSizeInByte);
  pCtx->sRawData.pStartPos = pNewBsBuff + (pCtx->sRawData.pStartPos - pCtx->sRawData.pHead);
  pCtx->sRawData.pCurPos   = pNewBsBuff + (pCtx->sRawData.pCurPos   - pCtx->sRawData.pHead);
  pCtx->sRawData.pEnd      = pNewBsBuff + iNewBuffLen;
  pMa->WelsFree (pCtx->sRawData.pHead, "pCtx->sRawData.pHead");
  pCtx->sRawData.pHead = pNewBsBuff;

  if (pCtx->pParam->bParseOnly) {
    //Realloc sSavedData
    uint8_t* pNewSavedBsBuff = static_cast<uint8_t*> (pMa->WelsMallocz (iNewBuffLen, "pCtx->sSavedData.pHead"));
    if (pNewSavedBsBuff == NULL) {
      WelsLog (& (pCtx->sLogCtx), WELS_LOG_ERROR, "ExpandBsBuffer() Failed for malloc pNewSavedBsBuff (%d)", iNewBuffLen);
      pCtx->iErrorCode |= dsOutOfMemory;
      return ERR_INFO_OUT_OF_MEMORY;
    }

    //Copy current buffer status to new buffer
    memcpy (pNewSavedBsBuff, pCtx->sSavedData.pHead, pCtx->iMaxBsBufferSizeInByte);
    pCtx->sSavedData.pStartPos = pNewSavedBsBuff + (pCtx->sSavedData.pStartPos - pCtx->sSavedData.pHead);
    pCtx->sSavedData.pCurPos   = pNewSavedBsBuff + (pCtx->sSavedData.pCurPos   - pCtx->sSavedData.pHead);
    pCtx->sSavedData.pEnd      = pNewSavedBsBuff + iNewBuffLen;
    pMa->WelsFree (pCtx->sSavedData.pHead, "pCtx->sSavedData.pHead");
    pCtx->sSavedData.pHead = pNewSavedBsBuff;
  }

  pCtx->iMaxBsBufferSizeInByte = iNewBuffLen;
  return ERR_NONE;
}

int32_t ExpandBsLenBuffer (PWelsDecoderContext pCtx, const int kiCurrLen) {
  SParserBsInfo* pParser = pCtx->pParserBsInfo;