On Fri, Aug 31, 2018 at 10:30:21AM +0800, Shiyou Yin wrote: > >-----Original Message----- > >From: ffmpeg-devel-boun...@ffmpeg.org > >[mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf Of > >Michael Niedermayer > >Sent: Friday, August 31, 2018 5:47 AM > >To: FFmpeg development discussions and patches > >Subject: Re: [FFmpeg-devel] [PATCH v2] avcodec/mips: [loongson] reoptimize > >h264_chroma_mc8_mmi v2. > > > >On Thu, Aug 30, 2018 at 02:24:04PM +0800, Shiyou Yin wrote: > >> Reoptimize function ff_put_h264_chroma_mc8_mmi and > >> ff_avg_h264_chroma_mc8_mmi. > >> Performance of h264 decoding improved about 5%(from 69fps to 73fps, tested > >> on loongson 3A3000). > > > >what do you mean by "Reoptimize"? > >does this port some optimizations from elsewhere ? > >does this take the same code as previous optimizations did and re implements > >(better/faster) MIPS code based on it ? > > > >what is the speed difference ? > > Two functions have optimized with mmi yet. > This patch was based on the previous version, then optimized the branch > condition and the code in > branch. > This patch will speed up about 5% for h264 decode on loongson platform. >
> >> > >> Change-Id: Iccd7f4e480b2d0bfc47e4d409874c4adb77416cc > > > >what is this ? > > The original patch was made from loongson's local repository(we use gerrit to > manage patch review > and merge), each commit has it's own Change-Id. > When I use git am to apply this patch to ffmpeg source, so the Change-Id was > keeped with commit > message. > I will remove it in the next version. you can use git notes to keep track of internal change-ids but they should not be in public commits as noone can do anything with them except you. [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB I am the wisest man alive, for I know one thing, and that is that I know nothing. -- Socrates
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