int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch()
int32_t (*block32)[12][64];
+ int dpcm_direction; // 0 = DCT, 1 = DPCM top to bottom scan, -1 = DPCM bottom to top scan
+ int16_t (*dpcm_macroblock)[3][256];
#define SLICE_OK 0
#define SLICE_ERROR -1