Method parse

YUViewLib/src/parser/Mpeg2/sequence_header.cpp:42–91

using namespace parser::reader;

void sequence_header::parse(SubByteReaderLogging &reader)
{
  SubByteReaderLoggingSubLevel subLevel(reader, "sequence_header");

  this->horizontal_size_value = reader.readBits("horizontal_size_value", 12);
  this->vertical_size_value   = reader.readBits("vertical_size_value", 12);

  this->aspect_ratio_information = reader.readBits(
      "aspect_ratio_information",
      4,
      Options()
          .withMeaningVector(
              {"Forbidden", "SAR 1.0 (Square Sample)", "DAR 3:4", "DAR 9:16", "DAR 1:2.21"})
          .withMeaning("Reserved"));

  this->frame_rate_code = reader.readBits("frame_rate_code",
                                          4,
                                          Options()
                                              .withMeaningVector({"Forbidden",
                                                                  "24000:1001 (23.976...)",
                                                                  "24",
                                                                  "25",
                                                                  "30000:1001 (29.97...)",
                                                                  "30",
                                                                  "50",
                                                                  "60000:1001 (59.94)",
                                                                  "60"})
                                              .withMeaning("Reserved"));

  this->bit_rate_value = reader.readBits(
      "bit_rate_value", 18, Options().withMeaning("The lower 18 bits of bit_rate."));
  this->marker_bit            = reader.readFlag("marker_bit", Options().withCheckEqualTo(1));
  this->vbv_buffer_size_value = reader.readBits(
      "vbv_buffer_size_value", 10, Options().withMeaning("the lower 10 bits of vbv_buffer_size"));
  this->constrained_parameters_flag = reader.readFlag("constrained_parameters_flag");
  this->load_intra_quantiser_matrix = reader.readFlag("load_intra_quantiser_matrix");
  if (this->load_intra_quantiser_matrix)
  {
    for (unsigned i = 0; i < 64; i++)
      this->intra_quantiser_matrix[i] =
          reader.readBits(formatArray("intra_quantiser_matrix", i), 8);
  }
  this->load_non_intra_quantiser_matrix = reader.readFlag("load_non_intra_quantiser_matrix");
  if (this->load_non_intra_quantiser_matrix)
  {
    for (unsigned i = 0; i < 64; i++)
      this->non_intra_quantiser_matrix[i] =
          reader.readBits(formatArray("non_intra_quantiser_matrix", i), 8);
  }
}

} // namespace parser::mpeg2