zero_cmp          412 libavcodec/me_cmp.c             cmp[i] = zero_cmp;
zero_cmp          374 libavcodec/motion_est.c             s->mecc.me_cmp[2] = zero_cmp;
zero_cmp          376 libavcodec/motion_est.c             s->mecc.me_sub_cmp[2] = zero_cmp;