public static QuantMatrixExtension read(BitReader inn)
{
QuantMatrixExtension qme = new QuantMatrixExtension();
if (inn.read1Bit() != 0)
{
qme.intra_quantiser_matrix = readQMat(inn);
}
if (inn.read1Bit() != 0)
{
qme.non_intra_quantiser_matrix = readQMat(inn);
}
if (inn.read1Bit() != 0)
{
qme.chroma_intra_quantiser_matrix = readQMat(inn);
}
if (inn.read1Bit() != 0)
{
qme.chroma_non_intra_quantiser_matrix = readQMat(inn);
}
return(qme);
}
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);
}
}