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avutil/{color_utils, csp}: merge color_utils into csp and expose API

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libavutil/color_utils contains some avpriv_ symbols that map
enum AVTransferCharacteristic values to gamma-curve approximations and
to the actual transfer functions to invert them (i.e. -> linear).

There's two issues with this:
(1) avpriv is evil and should be avoided whenever possible
(2) libavutil/csp.h exposes a public API for handling color that
    already handles primaries and matricies

I don't see any reason this API has to be private, so this commit takes
the functionality from avutil/color_utils and merges it into avutil/csp
with an exposed av_ API rather than the previous avpriv_ API.

Every reference to the previous API has been updated to point to the
new one. color_utils.h has been deleted as well. This should not break
any applications as it only contained avpriv_ symbols in the first
place, so nothing in that header could be referenced by other
applications.

Signed-off-by: Leo Izen <leo.izen@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Leo Izen
2023-01-30 11:50:10 -05:00
committed by Anton Khirnov
parent dc1b8135e0
commit 719a93f4e4
11 changed files with 225 additions and 304 deletions
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doc/APIchanges
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@@ -14,6 +14,10 @@ libavutil: 2021-04-27
API changes, most recent first:
2023-02-xx - xxxxxxxxxx - lavu 58.0.100 - csp.h
Add av_csp_approximate_trc_gamma() and av_csp_trc_func_from_id().
Add av_csp_trc_function.
2023-02-xx - xxxxxxxxxx - lavc 60.0.100 - avcodec.h
avcodec_decode_subtitle2() now accepts const AVPacket*.