On Fri, Aug 07, 2015 at 05:30:01PM +0800, 周晓勇 wrote: > based on last h264qpel optimization patch i have pushed > do i need separate this patch to double? cause one file to change loongson > arch > use looking up crop table method may boost up decode on loongson, and with > this patch x86 pass fate too
> but i have not tested on other arch as this also changes x86, benchmarks on x86 are required > > > test on loongson-3b > time ./ffmepg -i 1280x720.mp4 -f rawvideo -an -vframes 4096 -y /dev/null > > > no patch: > > > real 0m58.2s > user 4m59.1s > sys 0m5.8s > > > with patch: > > > real 0m53.9s > user 4m33.2s > sys 0m6.2s > > > --- > From 68e88b17d113875d829a9936284d3551fd499139 Mon Sep 17 00:00:00 2001 > From: ZhouXiaoyong <zhouxiaoy...@loongson.cn> > Date: Fri, 7 Aug 2015 16:33:10 +0800 > Subject: [PATCH] avcodec: use looking up crop table method when do clip [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Awnsering whenever a program halts or runs forever is On a turing machine, in general impossible (turings halting problem). On any real computer, always possible as a real computer has a finite number of states N, and will either halt in less than N cycles or never halt.
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