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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 */ |