MB_TYPE_REF0      105 libavcodec/h264.h #define IS_REF0(a)         ((a) & MB_TYPE_REF0)
MB_TYPE_REF0      118 libavcodec/h264data.h     { MB_TYPE_8x8   | MB_TYPE_P0L0 | MB_TYPE_P1L0 | MB_TYPE_REF0, 4 },