ff_me_cmp_sad      52 libavfilter/motion_estimation.c     me_ctx->get_cost = &ff_me_cmp_sad;
ff_me_cmp_sad      67 libavfilter/motion_estimation.h uint64_t ff_me_cmp_sad(AVMotionEstContext *me_ctx, int x_mb, int y_mb, int x_mv, int y_mv);