Hi Paul, > On 23 May 2016, at 13:13, Paul B Mahol <one...@gmail.com> wrote: > > On 5/23/16, Haavard Espeland <espel...@mixedrealities.no> wrote: >> Hi guys, >> >> We have been working on Prores Anatoliy optimizations to get the speed up on >> an embedded x86 platform. Fdct (10bit), scaling and encoding of code words >> have been optimized with AVX2 instructions, and the performance is increased >> by roughly 45% for the standard profile Prores 4:2:2 on our machine without >> any significant PSNR or file size differences from master. >> >> It is written using SIMD intrinsics, and I do understand you have a slightly >> negative view on instrinsics in ffmpeg, but we do not have the resources to >> rewrite this in nasm/yasm. >> >> Is there any point in cleaning up this patch for submission, or should we >> just keep it locally in our tree? > > I would like to see that code.
Please find attached the WIP patch against master. It is not meant for review or as a suggestion for inclusion since it requires significant cleanup / refactoring before that. What I wanted to find out if doing this is worth the effort, i.e., will it be considered for inclusion without a rewrite to asm, which we cannot do now, unfortunately. Remember to configure with ./configure --extra-cflags=“--march=native” since we haven’t made a proper way to build with intrinsics yet.
prores_avx2_wip.patch
Description: Binary data
Best, Håvard
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