lavu: rename audioconvert.* to channel_layout.* and deprecate audioconvert.h
[libav.git] / libavutil / channel_layout.h
1 /*
2 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (c) 2008 Peter Ross
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef AVUTIL_CHANNEL_LAYOUT_H
23 #define AVUTIL_CHANNEL_LAYOUT_H
24
25 #include <stdint.h>
26
27 /**
28 * @file
29 * audio channel layout utility functions
30 */
31
32 /**
33 * @addtogroup lavu_audio
34 * @{
35 */
36
37 /**
38 * @defgroup channel_masks Audio channel masks
39 * @{
40 */
41 #define AV_CH_FRONT_LEFT 0x00000001
42 #define AV_CH_FRONT_RIGHT 0x00000002
43 #define AV_CH_FRONT_CENTER 0x00000004
44 #define AV_CH_LOW_FREQUENCY 0x00000008
45 #define AV_CH_BACK_LEFT 0x00000010
46 #define AV_CH_BACK_RIGHT 0x00000020
47 #define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040
48 #define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080
49 #define AV_CH_BACK_CENTER 0x00000100
50 #define AV_CH_SIDE_LEFT 0x00000200
51 #define AV_CH_SIDE_RIGHT 0x00000400
52 #define AV_CH_TOP_CENTER 0x00000800
53 #define AV_CH_TOP_FRONT_LEFT 0x00001000
54 #define AV_CH_TOP_FRONT_CENTER 0x00002000
55 #define AV_CH_TOP_FRONT_RIGHT 0x00004000
56 #define AV_CH_TOP_BACK_LEFT 0x00008000
57 #define AV_CH_TOP_BACK_CENTER 0x00010000
58 #define AV_CH_TOP_BACK_RIGHT 0x00020000
59 #define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
60 #define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT.
61 #define AV_CH_WIDE_LEFT 0x0000000080000000ULL
62 #define AV_CH_WIDE_RIGHT 0x0000000100000000ULL
63 #define AV_CH_SURROUND_DIRECT_LEFT 0x0000000200000000ULL
64 #define AV_CH_SURROUND_DIRECT_RIGHT 0x0000000400000000ULL
65 #define AV_CH_LOW_FREQUENCY_2 0x0000000800000000ULL
66
67 /** Channel mask value used for AVCodecContext.request_channel_layout
68 to indicate that the user requests the channel order of the decoder output
69 to be the native codec channel order. */
70 #define AV_CH_LAYOUT_NATIVE 0x8000000000000000ULL
71
72 /**
73 * @}
74 * @defgroup channel_mask_c Audio channel convenience macros
75 * @{
76 * */
77 #define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
78 #define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
79 #define AV_CH_LAYOUT_2POINT1 (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
80 #define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
81 #define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
82 #define AV_CH_LAYOUT_3POINT1 (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
83 #define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
84 #define AV_CH_LAYOUT_4POINT1 (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
85 #define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
86 #define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
87 #define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
88 #define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
89 #define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
90 #define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
91 #define AV_CH_LAYOUT_6POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
92 #define AV_CH_LAYOUT_6POINT0_FRONT (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
93 #define AV_CH_LAYOUT_HEXAGONAL (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
94 #define AV_CH_LAYOUT_6POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
95 #define AV_CH_LAYOUT_6POINT1_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
96 #define AV_CH_LAYOUT_6POINT1_FRONT (AV_CH_LAYOUT_6POINT0_FRONT|AV_CH_LOW_FREQUENCY)
97 #define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
98 #define AV_CH_LAYOUT_7POINT0_FRONT (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
99 #define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
100 #define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
101 #define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
102 #define AV_CH_LAYOUT_OCTAGONAL (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
103 #define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
104
105 enum AVMatrixEncoding {
106 AV_MATRIX_ENCODING_NONE,
107 AV_MATRIX_ENCODING_DOLBY,
108 AV_MATRIX_ENCODING_DPLII,
109 AV_MATRIX_ENCODING_NB
110 };
111
112 /**
113 * @}
114 */
115
116 /**
117 * Return a channel layout id that matches name, or 0 if no match is found.
118 *
119 * name can be one or several of the following notations,
120 * separated by '+' or '|':
121 * - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
122 * 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
123 * - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
124 * SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
125 * - a number of channels, in decimal, optionally followed by 'c', yielding
126 * the default channel layout for that number of channels (@see
127 * av_get_default_channel_layout);
128 * - a channel layout mask, in hexadecimal starting with "0x" (see the
129 * AV_CH_* macros).
130 *
131 * Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
132 */
133 uint64_t av_get_channel_layout(const char *name);
134
135 /**
136 * Return a description of a channel layout.
137 * If nb_channels is <= 0, it is guessed from the channel_layout.
138 *
139 * @param buf put here the string containing the channel layout
140 * @param buf_size size in bytes of the buffer
141 */
142 void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout);
143
144 /**
145 * Return the number of channels in the channel layout.
146 */
147 int av_get_channel_layout_nb_channels(uint64_t channel_layout);
148
149 /**
150 * Return default channel layout for a given number of channels.
151 */
152 uint64_t av_get_default_channel_layout(int nb_channels);
153
154 /**
155 * Get the index of a channel in channel_layout.
156 *
157 * @param channel a channel layout describing exactly one channel which must be
158 * present in channel_layout.
159 *
160 * @return index of channel in channel_layout on success, a negative AVERROR
161 * on error.
162 */
163 int av_get_channel_layout_channel_index(uint64_t channel_layout,
164 uint64_t channel);
165
166 /**
167 * Get the channel with the given index in channel_layout.
168 */
169 uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
170
171 /**
172 * Get the name of a given channel.
173 *
174 * @return channel name on success, NULL on error.
175 */
176 const char *av_get_channel_name(uint64_t channel);
177
178 /**
179 * @}
180 */
181
182 #endif /* AVUTIL_CHANNEL_LAYOUT_H */