Method parse

YUViewLib/src/parser/VVC/scaling_list_data.cpp:87–136

using namespace parser::reader;

void scaling_list_data::parse(SubByteReaderLogging &reader, adaptation_parameter_set_rbsp *aps)
{
  SubByteReaderLoggingSubLevel subLevel(reader, "scaling_list_data");

  auto DiagScanOrder = calcDiagScanOrder();

  for (unsigned id = 0; id < 28; id++)
  {
    auto matrixSize = id < 2 ? 2u : (id < 8 ? 4u : 8u);
    this->ScalingList.push_back({});
    if (aps->aps_chroma_present_flag || id % 3 == 2 || id == 27)
    {
      this->scaling_list_copy_mode_flag[id] = reader.readFlag("scaling_list_copy_mode_flag");
      if (!this->scaling_list_copy_mode_flag[id])
      {
        this->scaling_list_pred_mode_flag[id] = reader.readFlag("scaling_list_pred_mode_flag");
      }
      if ((this->scaling_list_copy_mode_flag[id] || this->scaling_list_pred_mode_flag[id]) &&
          id != 0 && id != 2 && id != 8)
      {
        this->scaling_list_pred_id_delta[id] = reader.readUEV("scaling_list_pred_id_delta");
      }
      if (!this->scaling_list_copy_mode_flag[id])
      {
        auto nextCoef = 0;
        if (id > 13)
        {
          this->scaling_list_dc_coef[id] = reader.readSEV("scaling_list_dc_coef");
          nextCoef += this->scaling_list_dc_coef[id - 14];
        }

        for (unsigned i = 0; i < matrixSize * matrixSize; i++)
        {
          auto x = DiagScanOrder[3][3][i][0];
          auto y = DiagScanOrder[3][3][i][1];
          if (!(id > 25 && x >= 4 && y >= 4))
          {
            this->scaling_list_delta_coef[id][i] = reader.readSEV("scaling_list_delta_coef");
            nextCoef += this->scaling_list_delta_coef[id][i];
          }
          this->ScalingList[id].push_back(nextCoef);
        }
      }
    }
    else
    {
      this->scaling_list_copy_mode_flag[id] = true;
    }
  }
}

} // namespace parser::vvc