uint64_t(* diff1st_func)(const uint32_t w_act, const uint32_t h_act, const int16_t *o_m0, int16_t *o_m1, const int o)
uint64_t(* diff2nd_func)(const uint32_t w_act, const uint32_t h_act, const int16_t *o_m0, int16_t *o_m1, int16_t *o_m2, const int o)
uint64_t(* highds_func)(const int x_act, const int y_act, const int w_act, const int h_act, const int16_t *o_m0, const int o)