SEI

TODO: add description

SEI

sei_rbsp() {
    do {
        sei_message();
    } while( more_rbsp_data() );
    rbsp_trailing_bits();
}

sei_message() {
    payloadType = 0
    while ( next_bits(8) === 0xFF) {
        ff_byte                             f(8) // 0xFF
        payloadType += 255
    }
    last_payload_type_byte                  u(8)
    payloadType += last_payload_type_byte
    payloadSize = 0
    while (next_bits(8) === 0xFF) {
        ff_byte                             f(8) // 0xFF
        payloadSize += 255
    }
    last_payload_size_byte                  u(8)
    payloadSize += last_payload_size_byte
    sei_payload(payloadType, payloadSize);
}

sei_payload(payloadType, payloadSize) {
    switch (payloadType) {
    case  0: buffering_period( payloadSize );                   break;
    case  1: pic_timing( payloadSize );                         break;
    case  2: pan_scan_rect( payloadSize );                      break;
    case  3: filler_payload( payloadSize );                     break;
    case  4: user_data_registered_itu_t_t35( payloadSize );     break;
    case  5: user_data_unregistered( payloadSize );             break;
    case  6: recovery_point( payloadSize );                     break;
    case  7: dec_ref_pic_marking_repetition( payloadSize );     break;
    case  8: spare_pic( payloadSize );                          break;
    case  9: scene_info( payloadSize );                         break;
    case 10: sub_seq_info( payloadSize );                       break;
    case 11: sub_seq_layer_characteristics( payloadSize );      break;
    case 12: sub_seq_characteristics( payloadSize );            break;
    case 13: full_frame_freeze( payloadSize );                  break;
    case 14: full_frame_freeze_release( payloadSize );          break;
    case 15: full_frame_snapshot( payloadSize );                break;
    case 16: progressive_refinement_segment_start(payloadSize); break;
    case 17: progressive_refinement_segment_end(payloadSize);   break;
    case 18: motion_constrained_slice_group_set(payloadSize);   break;
    case 19: film_grain_characteristics( payloadSize );         break;
    case 20: deblocking_filter_display_preference(payloadSize); break;
    case 21: stereo_video_info( payloadSize );                  break;
    case 22: post_filter_hint( payloadSize );                   break;
    case 23: tone_mapping_info( payloadSize );                  break;
    case 24: scalability_info( payloadSize );                   break; // Annex G
    case 25: sub_pic_scalable_layer( payloadSize );             break; // Annex G
    case 26: non_required_layer_rep( payloadSize );             break; // Annex G
    case 27: priority_layer_info( payloadSize );                break; // Annex G
    case 28: layers_not_present( payloadSize );                 break; // Annex G
    case 29: layer_dependency_change( payloadSize );            break; // Annex G
    case 30: scalable_nesting( payloadSize );                   break; // Annex G
    case 31: base_layer_temporal_hrd( payloadSize );            break; // Annex G
    case 32: quality_layer_integrity_check( payloadSize );      break; // Annex G
    case 33: redundant_pic_property( payloadSize );             break; // Annex G
    case 34: tl0_dep_rep_index( payloadSize );                  break; // Annex G
    case 35: tl_switching_point( payloadSize );                 break; // Annex G
    case 36: parallel_decoding_info( payloadSize );             break; // Annex H
    case 37: mvc_scalable_nesting( payloadSize );               break; // Annex H
    case 38: view_scalability_info( payloadSize );              break; // Annex H
    case 39: multiview_scene_info( payloadSize );               break; // Annex H
    case 40: multiview_acquisition_info( payloadSize );         break; // Annex H
    case 41: non_required_view_component( payloadSize );        break; // Annex H
    case 42: view_dependency_change( payloadSize );             break; // Annex H
    case 43: operation_points_not_present( payloadSize );       break; // Annex H
    case 44: base_view_temporal_hrd( payloadSize );             break; // Annex H
    case 45: frame_packing_arrangement( payloadSize );          break;
    default:
        reserved_sei_message( payloadSize )
    }
    if ( !byte_aligned( ) ) {
        bit_equal_to_one            f(1) // `1`
        while( !byte_aligned( ) ) {
            bit_equal_to_zero       f(1) // `0`
        }
    }
}

reserved_sei_message( payloadSize ) {
    for( i = 0; i < payloadSize; i++ ) {
        reserved_sei_message_payload_byte                       b(8)
    }
}

user_data_unregistered( payloadSize ) {
    uuid_iso_iec_11578                                          u(128)
    for( i = 16; i < payloadSize; i++ ) {
        user_data_payload_byte                                  b(8)
    }
}