void(* spatial_compensation[12])(uint8_t *src, uint8_t *dst, int linesize)
void(* setup_spatial_compensation)(uint8_t *src, uint8_t *dst, int linesize, int *range, int *sum, int edges)
void(* h_loop_filter)(uint8_t *src, int stride, int qscale)
void(* v_loop_filter)(uint8_t *src, int stride, int qscale)