blob: ca28345aefa30927951704d303f3a95dbf329fb7
1 | /* |
2 | * Copyright (c) 2011 Justin Ruggles |
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 | /** |
22 | * mov 'chan' tag reading/writing. |
23 | * @author Justin Ruggles |
24 | */ |
25 | |
26 | #ifndef AVFORMAT_MOV_CHAN_H |
27 | #define AVFORMAT_MOV_CHAN_H |
28 | |
29 | #include <stdint.h> |
30 | |
31 | #include "libavcodec/avcodec.h" |
32 | #include "avformat.h" |
33 | |
34 | /** |
35 | * Get the channel layout for the specified channel layout tag. |
36 | * |
37 | * @param[in] tag channel layout tag |
38 | * @param[out] bitmap channel bitmap (only used if needed) |
39 | * @return channel layout |
40 | */ |
41 | uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap); |
42 | |
43 | /** |
44 | * Get the channel layout tag for the specified codec id and channel layout. |
45 | * If the layout tag was not found, use a channel bitmap if possible. |
46 | * |
47 | * @param[in] codec_id codec id |
48 | * @param[in] channel_layout channel layout |
49 | * @param[out] bitmap channel bitmap |
50 | * @return channel layout tag |
51 | */ |
52 | uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id, |
53 | uint64_t channel_layout, |
54 | uint32_t *bitmap); |
55 | |
56 | /** |
57 | * Read 'chan' tag from the input stream. |
58 | * |
59 | * @param s AVFormatContext |
60 | * @param pb AVIOContext |
61 | * @param st The stream to set codec values for |
62 | * @param size Remaining size in the 'chan' tag |
63 | * @return 0 if ok, or negative AVERROR code on failure |
64 | */ |
65 | int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, |
66 | int64_t size); |
67 | |
68 | #endif /* AVFORMAT_MOV_CHAN_H */ |
69 |