Method parseAndAddNALUnit

YUViewLib/src/parser/VVC/ParserAnnexBVVC.cpp:269–582

}

ParserAnnexB::ParseResult
ParserAnnexBVVC::parseAndAddNALUnit(int                                           nalID,
                                    const ByteVector &                            data,
                                    std::optional<BitratePlotModel::BitrateEntry> bitrateEntry,
                                    std::optional<pairUint64> nalStartEndPosFile,
                                    std::shared_ptr<TreeItem> parent)
{
  ParserAnnexB::ParseResult parseResult;
  parseResult.success = true;

  if (nalID == -1 && data.empty())
  {
    if (this->parsingState.currentAU.poc != -1)
    {
      parseResult.bitrateEntry = createBitrateEntryForAU(this->parsingState, bitrateEntry);
      if (!this->handleNewAU(this->parsingState))
      {
        DEBUG_VVC("Error handling last AU");
        parseResult.success = false;
      }
    }
    return parseResult;
  }

  // Skip the NAL unit header
  int readOffset = 0;
  if (data.at(0) == (char)0 && data.at(1) == (char)0 && data.at(2) == (char)1)
    readOffset = 3;
  else if (data.at(0) == (char)0 && data.at(1) == (char)0 && data.at(2) == (char)0 &&
           data.at(3) == (char)1)
    readOffset = 4;

  // Use the given tree item. If it is not set, use the nalUnitMode (if active).
  // Create a new TreeItem root for the NAL unit. We don't set data (a name) for this item
  // yet. We want to parse the item and then set a good description.
  std::shared_ptr<TreeItem> nalRoot;
  if (parent)
    nalRoot = parent->createChildItem();
  else if (packetModel->rootItem)
    nalRoot = packetModel->rootItem->createChildItem();

  if (nalRoot)
    ParserAnnexB::logNALSize(data, nalRoot, nalStartEndPosFile);

  reader::SubByteReaderLogging reader(data, nalRoot, "", readOffset);

  std::string specificDescription;
  auto        nalVVC              = std::make_shared<vvc::NalUnitVVC>(nalID, nalStartEndPosFile);
  auto        updatedParsingState = this->parsingState;
  try
  {
    nalVVC->header.parse(reader);

    auto nalType        = nalVVC->header.nal_unit_type;
    specificDescription = " " + NalTypeMapper.getName(nalType);

    if (updatedParsingState.NoOutputBeforeRecoveryFlag.count(nalVVC->header.nuh_layer_id) == 0)
      updatedParsingState.NoOutputBeforeRecoveryFlag[nalVVC->header.nuh_layer_id] = true;