MV_BWD_B3         552 libavcodec/cavs.c         h->mv[MV_BWD_B3] = ff_cavs_un_mv;
MV_BWD_B3         399 libavcodec/cavsdec.c                 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);