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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_BASE_CHANNEL_LAYOUT_H_ | 5 #ifndef MEDIA_BASE_CHANNEL_LAYOUT_H_ |
6 #define MEDIA_BASE_CHANNEL_LAYOUT_H_ | 6 #define MEDIA_BASE_CHANNEL_LAYOUT_H_ |
7 | 7 |
8 #include "media/base/media_export.h" | 8 #include "media/base/media_export.h" |
9 | 9 |
10 enum ChannelLayout { | 10 enum ChannelLayout { |
11 CHANNEL_LAYOUT_NONE = 0, | 11 CHANNEL_LAYOUT_NONE = 0, |
12 CHANNEL_LAYOUT_UNSUPPORTED, | 12 CHANNEL_LAYOUT_UNSUPPORTED, |
13 | 13 |
14 // Front C | 14 // Front C |
15 CHANNEL_LAYOUT_MONO, | 15 CHANNEL_LAYOUT_MONO, |
16 | 16 |
17 // Front L, Front R | 17 // Front L, Front R |
18 CHANNEL_LAYOUT_STEREO, | 18 CHANNEL_LAYOUT_STEREO, |
19 | 19 |
20 // Front L, Front R, Back C | 20 // Front L, Front R, Back C |
21 CHANNEL_LAYOUT_2_1, | 21 CHANNEL_LAYOUT_2_1, |
22 | 22 |
23 // Front L, Front R, Front C | 23 // Front L, Front R, Front C |
24 CHANNEL_LAYOUT_SURROUND, | 24 CHANNEL_LAYOUT_SURROUND, |
25 | 25 |
26 // Front L, Front R, Front C, Back C | 26 // Front L, Front R, Front C, Back C |
27 CHANNEL_LAYOUT_4POINT0, | 27 CHANNEL_LAYOUT_4_0, |
28 | 28 |
29 // Front L, Front R, Side L, Side R | 29 // Front L, Front R, Side L, Side R |
30 CHANNEL_LAYOUT_2_2, | 30 CHANNEL_LAYOUT_2_2, |
31 | 31 |
32 // Front L, Front R, Back L, Back R | 32 // Front L, Front R, Back L, Back R |
33 CHANNEL_LAYOUT_QUAD, | 33 CHANNEL_LAYOUT_QUAD, |
34 | 34 |
35 // Front L, Front R, Front C, Side L, Side R | 35 // Front L, Front R, Front C, Side L, Side R |
36 CHANNEL_LAYOUT_5POINT0, | 36 CHANNEL_LAYOUT_5_0, |
37 | 37 |
38 // Front L, Front R, Front C, Side L, Side R, LFE | 38 // Front L, Front R, Front C, Side L, Side R, LFE |
39 CHANNEL_LAYOUT_5POINT1, | 39 CHANNEL_LAYOUT_5_1, |
40 | 40 |
41 // Front L, Front R, Front C, Back L, Back R | 41 // Front L, Front R, Front C, Back L, Back R |
42 CHANNEL_LAYOUT_5POINT0_BACK, | 42 CHANNEL_LAYOUT_5_0_BACK, |
43 | 43 |
44 // Front L, Front R, Front C, Back L, Back R, LFE | 44 // Front L, Front R, Front C, Back L, Back R, LFE |
45 CHANNEL_LAYOUT_5POINT1_BACK, | 45 CHANNEL_LAYOUT_5_1_BACK, |
46 | 46 |
47 // Front L, Front R, Front C, Side L, Side R, Back L, Back R | 47 // Front L, Front R, Front C, Side L, Side R, Back L, Back R |
48 CHANNEL_LAYOUT_7POINT0, | 48 CHANNEL_LAYOUT_7_0, |
49 | 49 |
50 // Front L, Front R, Front C, Side L, Side R, LFE, Back L, Back R | 50 // Front L, Front R, Front C, Side L, Side R, LFE, Back L, Back R |
51 CHANNEL_LAYOUT_7POINT1, | 51 CHANNEL_LAYOUT_7_1, |
52 | 52 |
53 // Front L, Front R, Front C, Back L, Back R, LFE, Front LofC, Front RofC | 53 // Front L, Front R, Front C, Back L, Back R, LFE, Front LofC, Front RofC |
54 CHANNEL_LAYOUT_7POINT1_WIDE, | 54 CHANNEL_LAYOUT_7_1_WIDE, |
55 | 55 |
56 // Stereo L, Stereo R | 56 // Stereo L, Stereo R |
57 CHANNEL_LAYOUT_STEREO_DOWNMIX, | 57 CHANNEL_LAYOUT_STEREO_DOWNMIX, |
58 | 58 |
59 // Total number of layouts. | 59 // Total number of layouts. |
60 CHANNEL_LAYOUT_MAX | 60 CHANNEL_LAYOUT_MAX |
61 }; | 61 }; |
62 | 62 |
63 enum Channels { | 63 enum Channels { |
64 LEFT = 0, | 64 LEFT = 0, |
(...skipping 17 matching lines...) Expand all Loading... |
82 // left side surround sound channel in FFmpeg's 5.1 layout is in the 5th | 82 // left side surround sound channel in FFmpeg's 5.1 layout is in the 5th |
83 // position (because the order is L, R, C, LFE, LS, RS), so | 83 // position (because the order is L, R, C, LFE, LS, RS), so |
84 // kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4; | 84 // kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4; |
85 // Values of -1 mean the channel at that index is not used for that layout. | 85 // Values of -1 mean the channel at that index is not used for that layout. |
86 extern const int kChannelOrderings[CHANNEL_LAYOUT_MAX][CHANNELS_MAX]; | 86 extern const int kChannelOrderings[CHANNEL_LAYOUT_MAX][CHANNELS_MAX]; |
87 | 87 |
88 // Returns the number of channels in a given ChannelLayout. | 88 // Returns the number of channels in a given ChannelLayout. |
89 MEDIA_EXPORT int ChannelLayoutToChannelCount(ChannelLayout layout); | 89 MEDIA_EXPORT int ChannelLayoutToChannelCount(ChannelLayout layout); |
90 | 90 |
91 #endif // MEDIA_BASE_CHANNEL_LAYOUT_H_ | 91 #endif // MEDIA_BASE_CHANNEL_LAYOUT_H_ |
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