Method parse

YUViewLib/src/parser/AVC/SEI/pic_timing.cpp:42–187

using namespace reader;

SEIParsingResult pic_timing::parse(SubByteReaderLogging &                  reader,
                                   bool                                    reparse,
                                   SPSMap &                                spsMap,
                                   std::shared_ptr<seq_parameter_set_rbsp> associatedSPS)
{
  (void)spsMap;

  if (!associatedSPS)
  {
    if (reparse)
      throw std::logic_error("associatedSPS is nullptr");
    else
      return SEIParsingResult::WAIT_FOR_PARAMETER_SETS;
  }

  auto subLevel = SubByteReaderLoggingSubLevel(reader, "pic_timing()");

  // ... is dependent on the content of the sequence parameter set that is active for the primary
  // coded picture associated with the picture timing SEI message.
  auto CpbDpbDelaysPresentFlag =
      associatedSPS->seqParameterSetData.vuiParameters.nal_hrd_parameters_present_flag ||
      associatedSPS->seqParameterSetData.vuiParameters.vcl_hrd_parameters_present_flag;
  if (CpbDpbDelaysPresentFlag)
  {
    unsigned nrBits_removal_delay = 0;
    unsigned nrBits_output_delay  = 0;
    auto     NalHrdBpPresentFlag =
        associatedSPS->seqParameterSetData.vuiParameters.nal_hrd_parameters_present_flag;
    if (NalHrdBpPresentFlag)
    {
      nrBits_removal_delay = associatedSPS->seqParameterSetData.vuiParameters.nalHrdParameters
                                 .cpb_removal_delay_length_minus1 +
                             1;
      nrBits_output_delay = associatedSPS->seqParameterSetData.vuiParameters.nalHrdParameters
                                .dpb_output_delay_length_minus1 +
                            1;
    }
    auto VclHrdBpPresentFlag =
        associatedSPS->seqParameterSetData.vuiParameters.vcl_hrd_parameters_present_flag;
    if (VclHrdBpPresentFlag)
    {
      nrBits_removal_delay = associatedSPS->seqParameterSetData.vuiParameters.vclHrdParameters
                                 .cpb_removal_delay_length_minus1 +
                             1;
      nrBits_output_delay = associatedSPS->seqParameterSetData.vuiParameters.vclHrdParameters
                                .dpb_output_delay_length_minus1 +
                            1;
    }

    if (NalHrdBpPresentFlag || VclHrdBpPresentFlag)
    {
      this->cpb_removal_delay = reader.readBits("cpb_removal_delay", nrBits_removal_delay);
      this->dpb_output_delay  = reader.readBits("dpb_output_delay", nrBits_output_delay);
    }
  }

  if (associatedSPS->seqParameterSetData.vuiParameters.pic_struct_present_flag)
  {