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avutil/frame: add AVFrame.alpha_mode

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FFmpeg currently handles alpha in a quasi-arbitrary way. Some filters/codecs
assume alpha is premultiplied, others assume it is independent. If there is
to be any hope for order in this chaos, we need to start by defining an enum
for the possible range of values.
This commit is contained in:
Niklas Haas
2025-02-19 19:41:18 +01:00
parent f24474dcfc
commit 22929bd044
7 changed files with 59 additions and 1 deletions
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doc/APIchanges
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@@ -2,6 +2,10 @@ The last version increases of all libraries were on 2025-03-28
API changes, most recent first:
2025-09-xx - xxxxxxxxxx - lavu 60.11.100 - frame.h pixfmt.h
Add AVAlphaMode, AVFrame.alpha_mode, av_alpha_mode_name() and
av_alpha_mode_from_name().
2025-09-xx - xxxxxxxxxx - lsws 9.3.100 - swscale.h
Add SWS_UNSTABLE flag.