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 
av_downmix_info_update_side_data(AVFrame * frame)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