public static void readExtension(MemoryStream bb, SequenceHeader sh)
{
m_hasExtensions = true;
BitReader inb = new BitReader(bb);
int extType = inb.readNBit(4);
switch (extType)
{
case Sequence_Extension:
sh.sequenceExtension = SequenceExtension.read(inb);
break;
case Sequence_Scalable_Extension:
sh.sequenceScalableExtension = SequenceScalableExtension.read(inb);
break;
case Sequence_Display_Extension:
sh.sequenceDisplayExtension = SequenceDisplayExtension.read(inb);
break;
default:
throw new Exception("Unsupported extension: " + extType);
}
}
public static SequenceDisplayExtension read(BitReader inv)
{
SequenceDisplayExtension sde = new SequenceDisplayExtension();
sde.video_format = inv.readNBit(3);
if (inv.read1Bit() == 1)
{
sde.colorDescription = ColorDescription.read(inv);
}
sde.display_horizontal_size = inv.readNBit(14);
inv.read1Bit();
sde.display_vertical_size = inv.readNBit(14);
return(sde);
}
public void copyExtensions(SequenceHeader sh)
{
sequenceExtension = sh.sequenceExtension;
sequenceScalableExtension = sh.sequenceScalableExtension;
sequenceDisplayExtension = sh.sequenceDisplayExtension;
}