forked from chromium/chromium
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathchannel_layout.cc
260 lines (216 loc) · 8.09 KB
/
channel_layout.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/channel_layout.h"
#include "base/basictypes.h"
#include "base/logging.h"
namespace media {
static const int kLayoutToChannels[] = {
0, // CHANNEL_LAYOUT_NONE
0, // CHANNEL_LAYOUT_UNSUPPORTED
1, // CHANNEL_LAYOUT_MONO
2, // CHANNEL_LAYOUT_STEREO
3, // CHANNEL_LAYOUT_2_1
3, // CHANNEL_LAYOUT_SURROUND
4, // CHANNEL_LAYOUT_4_0
4, // CHANNEL_LAYOUT_2_2
4, // CHANNEL_LAYOUT_QUAD
5, // CHANNEL_LAYOUT_5_0
6, // CHANNEL_LAYOUT_5_1
5, // CHANNEL_LAYOUT_5_0_BACK
6, // CHANNEL_LAYOUT_5_1_BACK
7, // CHANNEL_LAYOUT_7_0
8, // CHANNEL_LAYOUT_7_1
8, // CHANNEL_LAYOUT_7_1_WIDE
2, // CHANNEL_LAYOUT_STEREO_DOWNMIX
3, // CHANNEL_LAYOUT_2POINT1
4, // CHANNEL_LAYOUT_3_1
5, // CHANNEL_LAYOUT_4_1
6, // CHANNEL_LAYOUT_6_0
6, // CHANNEL_LAYOUT_6_0_FRONT
6, // CHANNEL_LAYOUT_HEXAGONAL
7, // CHANNEL_LAYOUT_6_1
7, // CHANNEL_LAYOUT_6_1_BACK
7, // CHANNEL_LAYOUT_6_1_FRONT
7, // CHANNEL_LAYOUT_7_0_FRONT
8, // CHANNEL_LAYOUT_7_1_WIDE_BACK
8, // CHANNEL_LAYOUT_OCTAGONAL
0, // CHANNEL_LAYOUT_DISCRETE
3, // CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC
};
// The channel orderings for each layout as specified by FFmpeg. Each value
// represents the index of each channel in each layout. Values of -1 mean the
// channel at that index is not used for that layout. For example, the left side
// surround sound channel in FFmpeg's 5.1 layout is in the 5th position (because
// the order is L, R, C, LFE, LS, RS), so
// kChannelOrderings[CHANNEL_LAYOUT_5POINT1][SIDE_LEFT] = 4;
static const int kChannelOrderings[CHANNEL_LAYOUT_MAX + 1][CHANNELS_MAX + 1] = {
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR
// CHANNEL_LAYOUT_NONE
{ -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_UNSUPPORTED
{ -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_MONO
{ -1 , -1 , 0 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_STEREO
{ 0 , 1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_2_1
{ 0 , 1 , -1 , -1 , -1 , -1 , -1 , -1 , 2 , -1 , -1 },
// CHANNEL_LAYOUT_SURROUND
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_4_0
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , 3 , -1 , -1 },
// CHANNEL_LAYOUT_2_2
{ 0 , 1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , 2 , 3 },
// CHANNEL_LAYOUT_QUAD
{ 0 , 1 , -1 , -1 , 2 , 3 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_5_0
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , 3 , 4 },
// CHANNEL_LAYOUT_5_1
{ 0 , 1 , 2 , 3 , -1 , -1 , -1 , -1 , -1 , 4 , 5 },
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR
// CHANNEL_LAYOUT_5_0_BACK
{ 0 , 1 , 2 , -1 , 3 , 4 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_5_1_BACK
{ 0 , 1 , 2 , 3 , 4 , 5 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_7_0
{ 0 , 1 , 2 , -1 , 5 , 6 , -1 , -1 , -1 , 3 , 4 },
// CHANNEL_LAYOUT_7_1
{ 0 , 1 , 2 , 3 , 6 , 7 , -1 , -1 , -1 , 4 , 5 },
// CHANNEL_LAYOUT_7_1_WIDE
{ 0 , 1 , 2 , 3 , -1 , -1 , 6 , 7 , -1 , 4 , 5 },
// CHANNEL_LAYOUT_STEREO_DOWNMIX
{ 0 , 1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_2POINT1
{ 0 , 1 , -1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_3_1
{ 0 , 1 , 2 , 3 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_4_1
{ 0 , 1 , 2 , 4 , -1 , -1 , -1 , -1 , 3 , -1 , -1 },
// CHANNEL_LAYOUT_6_0
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , 5 , 3 , 4 },
// CHANNEL_LAYOUT_6_0_FRONT
{ 0 , 1 , -1 , -1 , -1 , -1 , 4 , 5 , -1 , 2 , 3 },
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR
// CHANNEL_LAYOUT_HEXAGONAL
{ 0 , 1 , 2 , -1 , 3 , 4 , -1 , -1 , 5 , -1 , -1 },
// CHANNEL_LAYOUT_6_1
{ 0 , 1 , 2 , 3 , -1 , -1 , -1 , -1 , 6 , 4 , 5 },
// CHANNEL_LAYOUT_6_1_BACK
{ 0 , 1 , 2 , 3 , 4 , 5 , -1 , -1 , 6 , -1 , -1 },
// CHANNEL_LAYOUT_6_1_FRONT
{ 0 , 1 , -1 , 6 , -1 , -1 , 4 , 5 , -1 , 2 , 3 },
// CHANNEL_LAYOUT_7_0_FRONT
{ 0 , 1 , 2 , -1 , -1 , -1 , 5 , 6 , -1 , 3 , 4 },
// CHANNEL_LAYOUT_7_1_WIDE_BACK
{ 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_OCTAGONAL
{ 0 , 1 , 2 , -1 , 5 , 6 , -1 , -1 , 7 , 3 , 4 },
// CHANNEL_LAYOUT_DISCRETE
{ -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR
};
int ChannelLayoutToChannelCount(ChannelLayout layout) {
DCHECK_LT(static_cast<size_t>(layout), arraysize(kLayoutToChannels));
return kLayoutToChannels[layout];
}
// Converts a channel count into a channel layout.
ChannelLayout GuessChannelLayout(int channels) {
switch (channels) {
case 1:
return CHANNEL_LAYOUT_MONO;
case 2:
return CHANNEL_LAYOUT_STEREO;
case 3:
return CHANNEL_LAYOUT_SURROUND;
case 4:
return CHANNEL_LAYOUT_QUAD;
case 5:
return CHANNEL_LAYOUT_5_0;
case 6:
return CHANNEL_LAYOUT_5_1;
case 7:
return CHANNEL_LAYOUT_6_1;
case 8:
return CHANNEL_LAYOUT_7_1;
default:
DVLOG(1) << "Unsupported channel count: " << channels;
}
return CHANNEL_LAYOUT_UNSUPPORTED;
}
int ChannelOrder(ChannelLayout layout, Channels channel) {
DCHECK_LT(static_cast<size_t>(layout), arraysize(kChannelOrderings));
DCHECK_LT(static_cast<size_t>(channel), arraysize(kChannelOrderings[0]));
return kChannelOrderings[layout][channel];
}
const char* ChannelLayoutToString(ChannelLayout layout) {
switch (layout) {
case CHANNEL_LAYOUT_NONE:
return "NONE";
case CHANNEL_LAYOUT_UNSUPPORTED:
return "UNSUPPORTED";
case CHANNEL_LAYOUT_MONO:
return "MONO";
case CHANNEL_LAYOUT_STEREO:
return "STEREO";
case CHANNEL_LAYOUT_2_1:
return "2.1";
case CHANNEL_LAYOUT_SURROUND:
return "SURROUND";
case CHANNEL_LAYOUT_4_0:
return "4.0";
case CHANNEL_LAYOUT_2_2:
return "2.2";
case CHANNEL_LAYOUT_QUAD:
return "QUAD";
case CHANNEL_LAYOUT_5_0:
return "5.0";
case CHANNEL_LAYOUT_5_1:
return "5.1";
case CHANNEL_LAYOUT_5_0_BACK:
return "5.0_BACK";
case CHANNEL_LAYOUT_5_1_BACK:
return "5.1_BACK";
case CHANNEL_LAYOUT_7_0:
return "7.0";
case CHANNEL_LAYOUT_7_1:
return "7.1";
case CHANNEL_LAYOUT_7_1_WIDE:
return "7.1_WIDE";
case CHANNEL_LAYOUT_STEREO_DOWNMIX:
return "STEREO_DOWNMIX";
case CHANNEL_LAYOUT_2POINT1:
return "2POINT1";
case CHANNEL_LAYOUT_3_1:
return "3.1";
case CHANNEL_LAYOUT_4_1:
return "4.1";
case CHANNEL_LAYOUT_6_0:
return "6.0";
case CHANNEL_LAYOUT_6_0_FRONT:
return "6.0_FRONT";
case CHANNEL_LAYOUT_HEXAGONAL:
return "HEXAGONAL";
case CHANNEL_LAYOUT_6_1:
return "6.1";
case CHANNEL_LAYOUT_6_1_BACK:
return "6.1_BACK";
case CHANNEL_LAYOUT_6_1_FRONT:
return "6.1_FRONT";
case CHANNEL_LAYOUT_7_0_FRONT:
return "7.0_FRONT";
case CHANNEL_LAYOUT_7_1_WIDE_BACK:
return "7.1_WIDE_BACK";
case CHANNEL_LAYOUT_OCTAGONAL:
return "OCTAGONAL";
case CHANNEL_LAYOUT_DISCRETE:
return "DISCRETE";
case CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC:
return "STEREO_AND_KEYBOARD_MIC";
}
NOTREACHED() << "Invalid channel layout provided: " << layout;
return "";
}
} // namespace media