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1 // Copyright (c) 2012 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 #include "media/base/channel_layout.h" | 5 #include "media/base/channel_layout.h" |
6 | 6 |
7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 | 9 |
10 namespace media { | 10 namespace media { |
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41 8, // CHANNEL_LAYOUT_OCTAGONAL | 41 8, // CHANNEL_LAYOUT_OCTAGONAL |
42 0, // CHANNEL_LAYOUT_DISCRETE | 42 0, // CHANNEL_LAYOUT_DISCRETE |
43 }; | 43 }; |
44 | 44 |
45 // The channel orderings for each layout as specified by FFmpeg. Each value | 45 // The channel orderings for each layout as specified by FFmpeg. Each value |
46 // represents the index of each channel in each layout. Values of -1 mean the | 46 // represents the index of each channel in each layout. Values of -1 mean the |
47 // channel at that index is not used for that layout.For example, the left side | 47 // channel at that index is not used for that layout.For example, the left side |
48 // surround sound channel in FFmpeg's 5.1 layout is in the 5th position (because | 48 // surround sound channel in FFmpeg's 5.1 layout is in the 5th position (because |
49 // the order is L, R, C, LFE, LS, RS), so | 49 // the order is L, R, C, LFE, LS, RS), so |
50 // kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4; | 50 // kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4; |
51 static const int kChannelOrderings[CHANNEL_LAYOUT_MAX][CHANNELS_MAX] = { | 51 static const int kChannelOrderings[CHANNEL_LAYOUT_MAX + 1][CHANNELS_MAX + 1] = { |
52 // FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR | 52 // FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR |
53 | 53 |
54 // CHANNEL_LAYOUT_NONE | 54 // CHANNEL_LAYOUT_NONE |
55 { -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, | 55 { -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, |
56 | 56 |
57 // CHANNEL_LAYOUT_UNSUPPORTED | 57 // CHANNEL_LAYOUT_UNSUPPORTED |
58 { -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, | 58 { -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, |
59 | 59 |
60 // CHANNEL_LAYOUT_MONO | 60 // CHANNEL_LAYOUT_MONO |
61 { -1 , -1 , 0 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, | 61 { -1 , -1 , 0 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 }, |
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239 case CHANNEL_LAYOUT_6_1_FRONT: | 239 case CHANNEL_LAYOUT_6_1_FRONT: |
240 return "6.1_FRONT"; | 240 return "6.1_FRONT"; |
241 case CHANNEL_LAYOUT_7_0_FRONT: | 241 case CHANNEL_LAYOUT_7_0_FRONT: |
242 return "7.0_FRONT"; | 242 return "7.0_FRONT"; |
243 case CHANNEL_LAYOUT_7_1_WIDE_BACK: | 243 case CHANNEL_LAYOUT_7_1_WIDE_BACK: |
244 return "7.1_WIDE_BACK"; | 244 return "7.1_WIDE_BACK"; |
245 case CHANNEL_LAYOUT_OCTAGONAL: | 245 case CHANNEL_LAYOUT_OCTAGONAL: |
246 return "OCTAGONAL"; | 246 return "OCTAGONAL"; |
247 case CHANNEL_LAYOUT_DISCRETE: | 247 case CHANNEL_LAYOUT_DISCRETE: |
248 return "DISCRETE"; | 248 return "DISCRETE"; |
249 case CHANNEL_LAYOUT_MAX: | |
250 break; | |
251 } | 249 } |
252 NOTREACHED() << "Invalid channel layout provided: " << layout; | 250 NOTREACHED() << "Invalid channel layout provided: " << layout; |
253 return ""; | 251 return ""; |
254 } | 252 } |
255 | 253 |
256 } // namespace media | 254 } // namespace media |
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