Function UpdateAccessUnit

codec/decoder/core/src/decoder_core.cpp:1442–1488

int32_t UpdateAccessUnit (PWelsDecoderContext pCtx) {
  PAccessUnit pCurAu   = pCtx->pAccessUnitList;
  int32_t iIdx         = pCurAu->uiEndPos;

  // Conversed iterator
  pCtx->uiTargetDqId = pCurAu->pNalUnitsList[iIdx]->sNalHeaderExt.uiLayerDqId;
  pCurAu->uiActualUnitsNum  = iIdx + 1;
  pCurAu->bCompletedAuFlag = true;

  // Added for mosaic avoidance, 11/19/2009
#ifdef LONG_TERM_REF
  if (pCtx->bParamSetsLostFlag || pCtx->bNewSeqBegin)
#else
  if (pCtx->bReferenceLostAtT0Flag || pCtx->bNewSeqBegin)
#endif
  {
    uint32_t uiActualIdx = 0;
    while (uiActualIdx < pCurAu->uiActualUnitsNum) {
      PNalUnit nal = pCurAu->pNalUnitsList[uiActualIdx];

      if (nal->sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR || nal->sNalHeaderExt.bIdrFlag) {
        break;
      }
      ++ uiActualIdx;
    }
    if (uiActualIdx ==
        pCurAu->uiActualUnitsNum) { // no found IDR nal within incoming AU, need exit to avoid mosaic issue, 11/19/2009

      pCtx->pDecoderStatistics->uiIDRLostNum++;
      if (!pCtx->bParamSetsLostFlag)
        WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
                 "UpdateAccessUnit():::::Key frame lost.....CAN NOT find IDR from current AU.");
      pCtx->iErrorCode |= dsRefLost;
      if (pCtx->pParam->eEcActiveIdc == ERROR_CON_DISABLE) {
#ifdef LONG_TERM_REF
        pCtx->iErrorCode |= dsNoParamSets;
        return dsNoParamSets;
#else
        pCtx->iErrorCode |= dsRefLost;
        return ERR_INFO_REFERENCE_PIC_LOST;
#endif
      }
    }
  }

  return ERR_NONE;
}

int32_t InitialDqLayersContext (PWelsDecoderContext pCtx, const int32_t kiMaxWidth, const int32_t kiMaxHeight) {
  int32_t i = 0;