public static PictureSpatialScalableExtension read(BitReader inb)
{
PictureSpatialScalableExtension psse = new PictureSpatialScalableExtension();
psse.lower_layer_temporal_reference = inb.readNBit(10);
inb.read1Bit();
psse.lower_layer_horizontal_offset = inb.readNBit(15);
inb.read1Bit();
psse.lower_layer_vertical_offset = inb.readNBit(15);
psse.spatial_temporal_weight_code_table_index = inb.readNBit(2);
psse.lower_layer_progressive_frame = inb.read1Bit();
psse.lower_layer_deinterlaced_field_select = inb.read1Bit();
return(psse);
}
public static void readExtension(MemoryStream bb, PictureHeader ph, SequenceHeader sh)
{
ph.m_hasExtensions = true;
BitReader inb = new BitReader(bb);
int extType = inb.readNBit(4);
switch (extType)
{
case Quant_Matrix_Extension:
ph.quantMatrixExtension = QuantMatrixExtension.read(inb);
break;
case Copyright_Extension:
ph.copyrightExtension = CopyrightExtension.read(inb);
break;
case Picture_Display_Extension:
ph.pictureDisplayExtension = PictureDisplayExtension.read(inb, sh.sequenceExtension,
ph.pictureCodingExtension);
break;
case Picture_Coding_Extension:
ph.pictureCodingExtension = PictureCodingExtension.read(inb);
break;
case Picture_Spatial_Scalable_Extension:
ph.pictureSpatialScalableExtension = PictureSpatialScalableExtension.read(inb);
break;
case Picture_Temporal_Scalable_Extension:
ph.pictureTemporalScalableExtension = PictureTemporalScalableExtension.read(inb);
break;
default:
throw new Exception("Unsupported extension: " + extType);
}
}
