2 * Copyright (c) 2011 Justin Ruggles
4 * This file is part of FFmpeg.
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.
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.
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
22 * mov 'chan' tag reading/writing.
23 * @author Justin Ruggles
26 #ifndef AVFORMAT_MOV_CHAN_H
27 #define AVFORMAT_MOV_CHAN_H
31 #include "libavcodec/avcodec.h"
35 * Get the channel layout for the specified channel layout tag.
37 * @param[in] tag channel layout tag
38 * @param[out] bitmap channel bitmap (only used if needed)
39 * @return channel layout
41 uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap);
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.
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
52 uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id,
53 uint64_t channel_layout,
57 * Read 'chan' tag from the input stream.
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
65 int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st,
68 #endif /* AVFORMAT_MOV_CHAN_H */