static void fill_table(uint8_t* table[256 + 2*YUVRGB_TABLE_HEADROOM], const int elemsize, const int inc, void *y_tab) { int i; uint8_t *y_table = y_tab; y_table -= elemsize * (inc >> 9); for (i = 0; i < 256 + 2*YUVRGB_TABLE_HEADROOM; i++) { int64_t cb = av_clip(i-YUVRGB_TABLE_HEADROOM, 0, 255)*inc; table[i] = y_table + elemsize * (cb >> 16); } }