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
|
// 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"
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_4POINT0
4, // CHANNEL_LAYOUT_2_2
4, // CHANNEL_LAYOUT_QUAD
5, // CHANNEL_LAYOUT_5POINT0
6, // CHANNEL_LAYOUT_5POINT1
5, // CHANNEL_LAYOUT_5POINT0_BACK
6, // CHANNEL_LAYOUT_5POINT1_BACK
7, // CHANNEL_LAYOUT_7POINT0
8, // CHANNEL_LAYOUT_7POINT1
8, // CHANNEL_LAYOUT_7POINT1_WIDE
2}; // CHANNEL_LAYOUT_STEREO_DOWNMIX
#if defined(OS_MACOSX) || defined(USE_PULSEAUDIO)
const int kChannelOrderings[CHANNEL_LAYOUT_MAX][CHANNELS_MAX] = {
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR | StL | StR
// CHANNEL_LAYOUT_NONE
{ -1 , -1 , -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 , -1 , -1 },
// CHANNEL_LAYOUT_MONO
{ -1 , -1 , 0 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_STEREO
{ 0 , 1 , -1 , -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 , -1 , -1 },
// CHANNEL_LAYOUT_SURROUND
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_4POINT0
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , 3 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_2_2
{ 0 , 1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , 2 , 3 , -1 , -1 },
// CHANNEL_LAYOUT_QUAD
{ 0 , 1 , -1 , -1 , 2 , 3 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_5POINT0
{ 0 , 1 , 2 , -1 , -1 , -1 , -1 , -1 , -1 , 3 , 4 , -1 , -1 },
// CHANNEL_LAYOUT_5POINT1
{ 0 , 1 , 2 , 3 , -1 , -1 , -1 , -1 , -1 , 4 , 5 , -1 , -1 },
// CHANNEL_LAYOUT_5POINT0_BACK
{ 0 , 1 , 2 , -1 , 3 , 4 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_5POINT1_BACK
{ 0 , 1 , 2 , 3 , 4 , 5 , -1 , -1 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_7POINT0
{ 0 , 1 , 2 , -1 , 5 , 6 , -1 , -1 , -1 , 3 , 4 , -1 , -1 },
// CHANNEL_LAYOUT_7POINT1
{ 0 , 1 , 2 , 3 , 6 , 7 , -1 , -1 , -1 , 4 , 5 , -1 , -1 },
// CHANNEL_LAYOUT_7POINT1_WIDE
{ 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , -1 , -1 , -1 , -1 , -1 },
// CHANNEL_LAYOUT_STEREO_DOWNMIX
{ -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , 0 , 1 },
// FL | FR | FC | LFE | BL | BR | FLofC | FRofC | BC | SL | SR | StL | StR
};
#endif
int ChannelLayoutToChannelCount(ChannelLayout layout) {
return kLayoutToChannels[layout];
}
|
