public static CopyrightExtension read(BitReader inb)
{
CopyrightExtension ce = new CopyrightExtension();
ce.copyright_flag = inb.read1Bit();
ce.copyright_identifier = inb.readNBit(8);
ce.original_or_copy = inb.read1Bit();
inb.skip(7);
inb.read1Bit();
ce.copyright_number_1 = inb.readNBit(20);
inb.read1Bit();
ce.copyright_number_2 = inb.readNBit(22);
inb.read1Bit();
ce.copyright_number_3 = inb.readNBit(22);
return(ce);
}
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);
}
}