int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);
int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);