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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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7
libavformat/movenc.c
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@@ -47,6 +47,7 @@
#include "internal.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/csp.h"
#include "libavutil/intfloat.h"
#include "libavutil/mathematics.h"
#include "libavutil/libm.h"
@@ -56,7 +57,6 @@
#include "libavutil/stereo3d.h"
#include "libavutil/timecode.h"
#include "libavutil/dovi_meta.h"
#include "libavutil/color_utils.h"
#include "libavutil/uuid.h"
#include "hevc.h"
#include "rtpenc.h"
@@ -2011,9 +2011,8 @@ static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
static int mov_write_gama_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track, double gamma)
{
uint32_t gama = 0;
if (gamma <= 0.0) {
gamma = avpriv_get_gamma_from_trc(track->par->color_trc);
}
if (gamma <= 0.0)
gamma = av_csp_approximate_trc_gamma(track->par->color_trc);
av_log(s, AV_LOG_DEBUG, "gamma value %g\n", gamma);
if (gamma > 1e-6) {