void(* mss2_gray_fill_masked)(uint8_t *dst, int dst_stride, int maskcolor, const uint8_t *mask, int mask_stride, int w, int h)
void(* mss2_blit_wmv9)(uint8_t *dst, int dst_stride, const uint8_t *srcy, int srcy_stride, const uint8_t *srcu, const uint8_t *srcv, int srcuv_stride, int w, int h)
void(* upsample_plane)(uint8_t *plane, int plane_stride, int w, int h)
void(* mss2_blit_wmv9_masked)(uint8_t *dst, int dst_stride, int maskcolor, const uint8_t *mask, int mask_stride, const uint8_t *srcy, int srcy_stride, const uint8_t *srcu, const uint8_t *srcv, int srcuv_stride, int w, int h)