Hi, On Wed, Aug 3, 2016 at 7:48 PM, Ronald S. Bultje <rsbul...@gmail.com> wrote:
> Hi, > > On Wed, Aug 3, 2016 at 1:57 PM, Michael Niedermayer < > mich...@niedermayer.cc> wrote: > >> Hi all >> >> Sun, Jul 31, 2016 at 10:01:00PM +0200, Michael Niedermayer wrote: >> > Hi all >> > >> > you have a great idea for a Outreachy task or a GSoC task ? >> > Or something you always wanted to do but never had the time and >> > it would fit in the time for GSoC/Outreachy ? >> > Or some feature you always wanted which would fit as a task? >> > Also keep in mind Outreachy is more flexible and not limited to >> > coding tasks ! >> > reply and dump it here below: >> >> ping ? >> >> also cc-ing ffmpeg-user >> >> or are all feature requests on trac fake and noone has anything they >> think should be implemented ? >> >> we need ideas for Outreachy, the page is EMPTY: >> https://trac.ffmpeg.org/wiki/SponsoringPrograms/Outreachy/2016-12 > > > I have some ideas. Most are TODOs / extensions to stuff I wrote that I > never ended up doing myself. Some might be hard. > > vp9: > - avx2 loopfilter functions. Qualification task: explain to me without any > guidance why it's an issue for AVX2 (or SSE2) that the loopfilter in vp9.c > works on 8px blocks, and explain how I solved that to work on 16px blocks > to use SSE2 instructions, and likewise explain how you would extend that to > work on 32px blocks. > - coefficient reading optimizations or arithmetic symbol reading > optimizations. I think this is too hard but it would be an amazing speed > optimization in vp9 decoding, since this is where pretty much all runtime > is spent after other optimizations. > - tile threading. This may actually be a nice qual task for the next block > since this is quite easy. > > frame/slice-mt: > - implement a mode that allows combining those. Qual task could be to > implement vp9 tile threading or something like that. Final deliverable > would implement this for at least vpN codec and one h.26x codec. > > I'll think about others. I'm willing to mentor the above maybe. > Thinking more about frame/slice-mt combination, I'd also like someone to implement WPP threading (in addition to tile/frame) for HEVC, and again a mode to combine WPP/tile + frame. The term "slice-mt" also becomes questionable and might need renaming to something broader. But then again, I also feel that for outreachy, these tasks might be hard and "vp9 tile" or "hevc wpp" might be a full outreachy task on their own, and "*-mt combining" might just be too hard for a "new" student. Comments? I also don't want to mentor everything myself so I'd probably want someone else to mentor hevc bits so I can remain more narrowly focussed on vp9 for now. Ronald _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
