aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/mov_chan.h
blob: ca28345aefa30927951704d303f3a95dbf329fb7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
/*
 * Copyright (c) 2011 Justin Ruggles
 *
 * 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
 */

/**
 * mov 'chan' tag reading/writing.
 * @author Justin Ruggles
 */

#ifndef AVFORMAT_MOV_CHAN_H
#define AVFORMAT_MOV_CHAN_H

#include <stdint.h>

#include "libavcodec/avcodec.h"
#include "avformat.h"

/**
 * Get the channel layout for the specified channel layout tag.
 *
 * @param[in]  tag     channel layout tag
 * @param[out] bitmap  channel bitmap (only used if needed)
 * @return             channel layout
 */
uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap);

/**
 * Get the channel layout tag for the specified codec id and channel layout.
 * If the layout tag was not found, use a channel bitmap if possible.
 *
 * @param[in]  codec_id        codec id
 * @param[in]  channel_layout  channel layout
 * @param[out] bitmap          channel bitmap
 * @return                     channel layout tag
 */
uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id,
                                       uint64_t channel_layout,
                                       uint32_t *bitmap);

/**
 * Read 'chan' tag from the input stream.
 *
 * @param s     AVFormatContext
 * @param pb    AVIOContext
 * @param st    The stream to set codec values for
 * @param size  Remaining size in the 'chan' tag
 * @return      0 if ok, or negative AVERROR code on failure
 */
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st,
                     int64_t size);

#endif /* AVFORMAT_MOV_CHAN_H */