/*
  * 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