IS_MARKER          51 libavcodec/dca_parser.c #define IS_MARKER(state)        (IS_CORE_MARKER(state) || IS_EXSS_MARKER(state))
IS_MARKER          44 libavcodec/vc1_common.h #define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)