Niklas Haas (12021-03-09): > From: Niklas Haas <g...@haasn.xyz> > > This filter conceptually maps the libplacebo `pl_renderer` API into > libavfilter, which is a high-level image rendering API designed to work > with an RGB pipeline internally. As such, there's no way to avoid e.g. > chroma interpolation with this filter, although new versions of > libplacebo support outputting back to subsampled YCbCr after processing > is done. > > That being said, `pl_renderer` supports automatic integration of the > majority of libplacebo's shaders, ranging from debanding to tone > mapping, and also supports loading custom mpv-style user shaders, making > this API a natural candidate for getting a lot of functionality out of > relatively little code. > > In the future, I may approach this problem either by rewriting this > filter to also support a non-renderer codepath, or by upgrading > libplacebo's renderer to support a full YCbCr pipeline. > > It's worth noting that this filter could be extended in the future to > support HWframes frames of type AV_PIX_FMT_VULKAN, but this is not > currently possible due to API limitations in the vulkan hwaccel. > (Although it's also worth pointing out that, apart from a single > `pl_vulkan_create` call, the current `vf_libplacebo` code does not > depend on vulkan at all - so in theory it could be extended to support > OpenGL or other libplacebo backends) > --- > configure | 3 + > libavfilter/Makefile | 1 + > libavfilter/allfilters.c | 1 + > libavfilter/vf_libplacebo.c | 627 ++++++++++++++++++++++++++++++++++++ > 4 files changed, 632 insertions(+) > create mode 100644 libavfilter/vf_libplacebo.c
Thanks for the patch. I have not yet looked at the code itself. Please include some documentation, it would be helpful even for reviewing. Regards, -- Nicolas George
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