text: /**
   * Copyright (c) 2016 Neil Birkbeck <neil.birkbeck@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_MASTERING_DISPLAY_METADATA_H
  #define AVUTIL_MASTERING_DISPLAY_METADATA_H
  
  #include "frame.h"
  
  /**
   * Mastering display metadata capable of representing the color volume of
   * the display used to master the content (SMPTE 2086:2014).
   *
   * To be used as payload of a AVFrameSideData or AVPacketSideData with the
   * appropriate type.
   *
   * @note The struct should be allocated with av_mastering_display_metadata_alloc()
   *       and its size is not a part of the public ABI.
   */
  typedef struct AVMasteringDisplayMetadata {
      /**
       * CIE 1931 xy chromaticity coords of color primaries (r, g, b order).
       */
      float display_primaries[3][2];
  
      /**
       * CIE 1931 xy chromaticity coords of white point.
       */
      float white_point[2];
  
      /**
       * Min luminance of mastering display (cd/m^2).
       */
      float min_luminance;
  
      /**
       * Max luminance of mastering display (cd/m^2).
       */
      float max_luminance;
  
      /**
       * Flag indicating whether the display primaries (and white point) are set.
       */
      int has_primaries;
  
      /**
       * Flag indicating whether the luminance (min_ and max_) have been set.
       */
      int has_luminance;
  
  } AVMasteringDisplayMetadata;
  
  /**
   * Allocate an AVMasteringDisplayMetadata structure and set its fields to
   * default values. The resulting struct can be freed using av_freep().
   *
   * @return An AVMasteringDisplayMetadata filled with default values or NULL
   *         on failure.
   */
  AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc(void);
  
  /**
   * Allocate a complete AVMasteringDisplayMetadata and add it to the frame.
   *
   * @param frame The frame which side data is added to.
   *
   * @return The AVMasteringDisplayMetadata structure to be filled by caller.
   */
  AVMasteringDisplayMetadata *av_mastering_display_metadata_create_side_data(AVFrame *frame);
  
  #endif /* AVUTIL_MASTERING_DISPLAY_METADATA_H */
  