int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block,
int n, int coded, const uint8_t *scan_table);
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,
int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block,
int n, int coded, const uint8_t *scan_table);
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,