void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride,
int sx, int sy, int b_w, int b_h, BlockNode *block,
int plane_index, int w, int h);
void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride,
int sx, int sy, int b_w, int b_h, BlockNode *block,
int plane_index, int w, int h);