On Fri, Mar 20, 2015 at 04:06:56PM +0800, 周晓勇 wrote: > The optimization mainly include libavcodec, libavutil, and mplayer's > fast_memcpy.
Note that fast_memcpy for 720p and above really is only a bad workaround against horrible libc implementations. I can only strongly recommend to fix the libc implementation of memcpy, for resolutions of 720p and above there is no excuse for the libc memcpy being slower than a well optimized fast_memcpy. You really don't want to end up in the same ridiculous situation as PowerPC where everyone who wants good performance has to re-implement the standard C library because nobody could be bothered to do things properly there. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel