PVR_STREAM_EXTHDR_TYPE_SHIFT
#define PVR_STREAM_EXTHDR_TYPE_MASK (7U << PVR_STREAM_EXTHDR_TYPE_SHIFT)
type = (ext_header & PVR_STREAM_EXTHDR_TYPE_MASK) >> PVR_STREAM_EXTHDR_TYPE_SHIFT;