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

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>

1 files changed, 0 insertions, 56 deletions

diff --git a/libavutil/color_utils.h b/libavutil/color_utils.h
deleted file mode 100644
index 9529006452..0000000000
--- a/libavutil/color_utils.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (c) 2015 Kevin Wheatley <kevin.j.wheatley@gmail.com>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVUTIL_COLOR_UTILS_H
-#define AVUTIL_COLOR_UTILS_H
-
-
-#include "libavutil/pixfmt.h"
-
-/**
- * Determine a suitable 'gamma' value to match the supplied
- * AVColorTransferCharacteristic.
- *
- * See Apple Technical Note TN2257 (https://developer.apple.com/library/mac/technotes/tn2257/_index.html)
- *
- * @return Will return an approximation to the simple gamma function matching
- *         the supplied Transfer Characteristic, Will return 0.0 for any
- *         we cannot reasonably match against.
- */
-double avpriv_get_gamma_from_trc(enum AVColorTransferCharacteristic trc);
-
-
-typedef double (*avpriv_trc_function)(double);
-
-/**
- * Determine the function needed to apply the given
- * AVColorTransferCharacteristic to linear input.
- *
- * The function returned should expect a nominal domain and range of [0.0-1.0]
- * values outside of this range maybe valid depending on the chosen
- * characteristic function.
- *
- * @return Will return pointer to the function matching the
- *         supplied Transfer Characteristic. If unspecified will
- *         return NULL:
- */
-avpriv_trc_function avpriv_get_trc_function_from_trc(enum AVColorTransferCharacteristic trc);
-
-#endif