#ifdef HAVE_MMX
void MPV_common_init_mmx(MpegEncContext *s);
#endif
-int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
-void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w);
+extern int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
+extern void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w);
void ff_conceal_past_errors(MpegEncContext *s, int conceal_all);
void ff_copy_bits(PutBitContext *pb, UINT8 *src, int length);
void ff_clean_intra_table_entries(MpegEncContext *s);