Lynne 4f9ee87253 libavutil: introduce AVFilmGrainParams side data ...

This patch introduces a new frame side data type AVFilmGrainParams for use
with video codecs which support it.

It can save a lot of memory used for duplicate processed reference frames and
reduce copies when applying film grain during presentation.

2020-11-25 23:06:33 +01:00

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