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);
+int ff_snow_get_buffer(SnowContext *s, AVFrame *frame);
/* common inline functions */
//XXX doublecheck all of them should stay inlined