Part of MPlayer patch:

"Replace implicit use of fast_memcpy via macro by explicit use to allow
for future optimization."
This is not yet done for ffmpeg when compiled within MPlayer.

Originally committed as revision 9225 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/internal.h

@@ -108,6 +108,7 @@
 
 #ifdef USE_FASTMEMCPY
 #    include "libvo/fastmemcpy.h"
+#    define memcpy(a,b,c) fast_memcpy(a,b,c)
 #endif
 
 // Use rip-relative addressing if compiling PIC code on x86-64.