1/*
2 * Copyright (c) 2011 Justin Ruggles
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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
33/**
34 * Get the channel layout for the specified channel layout tag.
35 *
36 * @param[in]  tag     channel layout tag
37 * @param[out] bitmap  channel bitmap (only used if needed)
38 * @return             channel layout
39 */
40uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap);
41
42/**
43 * Get the channel layout for the specified channel layout tag.
44 *
45 * @param[in]  tag     channel label
46 * @return             channel layout mask fragment
47 */
48uint32_t ff_mov_get_channel_label(uint32_t label);
49
50/**
51 * Get the channel layout tag for the specified codec id and channel layout.
52 * If the layout tag was not found, use a channel bitmap if possible.
53 *
54 * @param[in]  codec_id        codec id
55 * @param[in]  channel_layout  channel layout
56 * @param[out] bitmap          channel bitmap
57 * @return                     channel layout tag
58 */
59uint32_t ff_mov_get_channel_layout_tag(enum CodecID codec_id,
60                                       uint64_t channel_layout,
61                                       uint32_t *bitmap);
62
63#endif /* AVFORMAT_MOV_CHAN_H */
64