internal VpsExtension(ref BitReader reader, byte vps_max_layers, bool vps_base_layer_internal_flag, byte vps_max_sub_layers)
{
// F.7.3.2.1.1 Video parameter set extension syntax, page 444
// F.7.4.3.1.1 Video parameter set extension semantics, page 464
if (vps_max_layers > 1 && vps_base_layer_internal_flag)
{
ProfileTierLevel.skip(ref reader, false, vps_max_sub_layers);
}
bool splitting_flag = reader.readBit();
int NumScalabilityTypes = NumberOfSetBits(reader.readInt(16)); // scalability_mask_flag[ i ]
Span <byte> dimension_id_len = stackalloc byte[NumScalabilityTypes];
for (int j = 0; j < (NumScalabilityTypes - ((splitting_flag) ? 1 : 0)); j++)
{
dimension_id_len[j] = (byte)(reader.readInt(3) + 1); // dimension_id_len_minus1[ j ]
}
bool vps_nuh_layer_id_present_flag = reader.readBit();
for (int i = 1; i < vps_max_layers; i++)
{
if (vps_nuh_layer_id_present_flag)
{
reader.skipBits(6); // layer_id_in_nuh[ i ]
}
if (!splitting_flag)
{
for (int j = 0; j < NumScalabilityTypes; j++)
{
reader.skipBits(dimension_id_len[j]); // dimension_id[ i ][ j ]
}
}
}
byte view_id_len = reader.readByte(4);
/* int NumViews = 1;
* for( int i = 1; i < vps_max_layers; i++ )
* {
* bool newViewFlag = true;
* for( int j = 0; j < i; j++ )
* {
* if( ViewOrderIdx[ lId ] = ViewOrderIdx[ layer_id_in_nuh[ j ] ] ) newViewFlag = 0
* }
* }
*
* if( view_id_len > 0 )
* {
* for( int i = 0; i < NumViews; i++ )
* {
*
* }
* } */
}
public SequenceParameterSet(ReadOnlySpan <byte> span, Dictionary <byte, VideoParameterSet> vpsDict, byte nuh_layer_id = 0)
{
// System.IO.File.WriteAllBytes( @"C:\Temp\2remove\mkv\sps.bin", span.ToArray() );
// MiscUtils.writeBinaryText( @"C:\Temp\2remove\mkv\sps.txt", span );
BitReader reader = new BitReader(span);
checked
{
// F.7.3.2.2.1 General sequence parameter set RBSP syntax, page 450
vpsId = reader.readByte(4); // sps_video_parameter_set_id
VideoParameterSet vps = vpsDict[vpsId];
maxSubLayers = (byte)(reader.readInt(3) + 1); // sps_max_sub_layers_minus1 or sps_ext_or_max_sub_layers_minus1
sps_temporal_id_nesting_flag = reader.readBit();
// const bool MultiLayerExtSpsFlag = false; // nuh_layer_id != 0 && sps_ext_or_max_sub_layers_minus1 = = 7
ProfileTierLevel.skip(ref reader, true, maxSubLayers);
sps_seq_parameter_set_id = reader.unsignedGolomb();
chromaFormat = (eChromaFormat)reader.unsignedGolomb();
if (chromaFormat == eChromaFormat.c444)
{
separate_colour_plane_flag = reader.readBit();
}
else
{
separate_colour_plane_flag = false;
}
CSize size = default;
size.cx = (int)reader.unsignedGolomb();
size.cy = (int)reader.unsignedGolomb();
CRect rc;
if (reader.readBit()) // conformance_window_flag
{
rc = default;
int scalingX = (chromaFormat < eChromaFormat.c444) ? 2 : 1;
rc.left = scalingX * (int)reader.unsignedGolomb(); // conf_win_vps_left_offset
rc.right = size.cx - scalingX * (int)reader.unsignedGolomb(); // conf_win_vps_right_offset
int scalingY = (chromaFormat < eChromaFormat.c422) ? 2 : 1;
rc.top = scalingY * (int)reader.unsignedGolomb(); // conf_win_vps_top_offset
rc.bottom = size.cy - scalingY * (int)reader.unsignedGolomb(); // conf_win_vps_bottom_offset
}
else
{
rc = new CRect(default, size);