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  1. /*
  2.  * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "downmix_info.h"
  22. #include "frame.h"
  23.  
  24. AVDownmixInfo *av_downmix_info_update_side_data(AVFrame *frame)
  25. {
  26.     AVFrameSideData *side_data;
  27.  
  28.     side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_DOWNMIX_INFO);
  29.  
  30.     if (!side_data)
  31.         side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_DOWNMIX_INFO,
  32.                                            sizeof(AVDownmixInfo));
  33.  
  34.     if (!side_data)
  35.         return NULL;
  36.  
  37.     return (AVDownmixInfo*)side_data->data;
  38. }
  39.