CHECK_BIDIR2     1340 libavcodec/motion_est.c             CHECK_BIDIR2(0,0,0,1)
CHECK_BIDIR2     1341 libavcodec/motion_est.c             CHECK_BIDIR2(0,0,1,0)
CHECK_BIDIR2     1342 libavcodec/motion_est.c             CHECK_BIDIR2(0,1,0,0)
CHECK_BIDIR2     1343 libavcodec/motion_est.c             CHECK_BIDIR2(1,0,0,0)