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mov_chan.h
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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  */
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  */
66  int64_t size);
67 
68 #endif /* AVFORMAT_MOV_CHAN_H */
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id, uint64_t channel_layout, uint32_t *bitmap)
Get the channel layout tag for the specified codec id and channel layout.
Definition: mov_chan.c:494
Format I/O context.
Definition: avformat.h:1338
uint32_t tag
Definition: movenc.c:1412
ptrdiff_t size
Definition: opengl_enc.c:101
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
Stream structure.
Definition: avformat.h:889
Libavcodec external API header.
uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap)
mov 'chan' tag reading/writing.
Definition: mov_chan.c:454
Main libavformat public API header.
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:547