On Tuesday, August 30, 2016, Nicolas George <geo...@nsup.org> wrote:
> Le duodi 12 fructidor, an CCXXIV, Paul B Mahol a écrit : > > Nicolas, what is status of this? > > > > I'm currently interested in frame multithreading in lavfi. > > I am currently locked on a patch series to replace the recursive calls to > filter_frames() with a FIFO on each link. > > I think this is an absolute necessity before considering inter-filter > multithreading. > > Unfortunately, this is very tricky business because the filters' > implementation are not ready for it. Filters must be activated, by actually > calling their filter_frame() methods, when a frame is available, but not > repeatedly so when they can not perform any work, but they often provide no > visible test for that. Plus, the global API for activating a filtergraph > was > not designed with that kind of working in mind. > > I have made significant progress in the last weeks. I think I have got the > propagating of frames working, and the propagating of EOF conditions on > 1-to-1 filters too, but there is still an issue with filters with multiple > inputs. > > I could post the whole patch as is at any time, but I do not think it would > do much good as is. > > the filter frame multithreading would just internally, in filter context cache frames, once enough frames are in cache - call workers and be done, repeat. At eof call workers on remaining frames in cache. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
