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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined(AudioLayout_h)
# define AudioLayout_h
# include <cstdint>
# include <initializer_list>
# include "mozilla/MathAlgorithms.h"
# include "nsTArray.h"
# include "cubeb/cubeb.h"
namespace mozilla {
class AudioConfig {
public:
// Channel definition is conveniently defined to be in the same order as
// WAVEFORMAT && SMPTE, even though this is unused for now.
enum Channel {
CHANNEL_INVALID = -1,
CHANNEL_FRONT_LEFT = 0,
CHANNEL_FRONT_RIGHT,
CHANNEL_FRONT_CENTER,
CHANNEL_LFE,
CHANNEL_BACK_LEFT,
CHANNEL_BACK_RIGHT,
CHANNEL_FRONT_LEFT_OF_CENTER,
CHANNEL_FRONT_RIGHT_OF_CENTER,
CHANNEL_BACK_CENTER,
CHANNEL_SIDE_LEFT,
CHANNEL_SIDE_RIGHT,
// From WAVEFORMAT definition.
CHANNEL_TOP_CENTER,
CHANNEL_TOP_FRONT_LEFT,
CHANNEL_TOP_FRONT_CENTER,
CHANNEL_TOP_FRONT_RIGHT,
CHANNEL_TOP_BACK_LEFT,
CHANNEL_TOP_BACK_CENTER,
CHANNEL_TOP_BACK_RIGHT
};
class ChannelLayout {
public:
// The maximum number of channels a channel map can represent.
static constexpr uint32_t MAX_CHANNELS = 32;
typedef uint32_t ChannelMap;
ChannelLayout() : mChannelMap(UNKNOWN_MAP), mValid(false) {}
explicit ChannelLayout(uint32_t aChannels)
: ChannelLayout(aChannels, DefaultLayoutForChannels(aChannels)) {}
ChannelLayout(uint32_t aChannels, const Channel* aConfig)
: ChannelLayout() {
if (aChannels == 0 || !aConfig) {
return;
}
mChannels.AppendElements(aConfig, aChannels);
UpdateChannelMap();
}
explicit ChannelLayout(std::initializer_list<Channel> aChannelList)
: ChannelLayout(aChannelList.size(), aChannelList.begin()) {}
bool operator==(const ChannelLayout& aOther) const {
return mChannels == aOther.mChannels;
}
bool operator!=(const ChannelLayout& aOther) const {
return mChannels != aOther.mChannels;
}
const Channel& operator[](uint32_t aIndex) const {
MOZ_ASSERT(mChannels.Length() > aIndex);
return mChannels[aIndex];
}
uint32_t Count() const { return mChannels.Length(); }
ChannelMap Map() const;
// Calculate the mapping table from the current layout to aOther such that
// one can easily go from one layout to the other by doing:
// out[channel] = in[map[channel]].
// Returns true if the reordering is possible or false otherwise.
// If true, then aMap, if set, will be updated to contain the mapping table
// allowing conversion from the current layout to aOther.
// If aMap is empty, then MappingTable can be used to simply determine if
// the current layout can be easily reordered to aOther.
bool MappingTable(const ChannelLayout& aOther,
nsTArray<uint8_t>* aMap = nullptr) const;
bool IsValid() const { return mValid; }
bool HasChannel(Channel aChannel) const {
return mChannelMap & (1 << aChannel);
}
// Return the number of channels found in this ChannelMap.
static uint32_t Channels(ChannelMap aMap) {
static_assert(sizeof(ChannelMap) == sizeof(uint32_t),
"Must adjust ChannelMap type");
return CountPopulation32(aMap);
}
static ChannelLayout SMPTEDefault(const ChannelLayout& aChannelLayout);
static ChannelLayout SMPTEDefault(ChannelMap aMap);
static constexpr ChannelMap UNKNOWN_MAP = 0;
// Common channel layout definitions.
static constexpr ChannelMap LMONO_MAP = 1 << CHANNEL_FRONT_CENTER;
static constexpr ChannelMap LMONO_LFE_MAP =
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE;
static constexpr ChannelMap LSTEREO_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT;
static constexpr ChannelMap LSTEREO_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE;
static constexpr ChannelMap L3F_MAP = 1 << CHANNEL_FRONT_LEFT |
1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER;
static constexpr ChannelMap L3F_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE;
static constexpr ChannelMap L2F1_MAP = 1 << CHANNEL_FRONT_LEFT |
1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_BACK_CENTER;
static constexpr ChannelMap L2F1_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
1 << CHANNEL_BACK_CENTER;
static constexpr ChannelMap L3F1_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_BACK_CENTER;
static constexpr ChannelMap LSURROUND_MAP = L3F1_MAP;
static constexpr ChannelMap L3F1_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_BACK_CENTER;
static constexpr ChannelMap L2F2_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_SIDE_LEFT | 1 << CHANNEL_SIDE_RIGHT;
static constexpr ChannelMap L2F2_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
1 << CHANNEL_SIDE_LEFT | 1 << CHANNEL_SIDE_RIGHT;
static constexpr ChannelMap LQUAD_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_BACK_LEFT | 1 << CHANNEL_BACK_RIGHT;
static constexpr ChannelMap LQUAD_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
1 << CHANNEL_BACK_LEFT | 1 << CHANNEL_BACK_RIGHT;
static constexpr ChannelMap L3F2_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_SIDE_LEFT |
1 << CHANNEL_SIDE_RIGHT;
static constexpr ChannelMap L3F2_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_SIDE_LEFT |
1 << CHANNEL_SIDE_RIGHT;
// 3F2_LFE Alias
static constexpr ChannelMap L5POINT1_SURROUND_MAP = L3F2_LFE_MAP;
static constexpr ChannelMap L3F2_BACK_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_BACK_LEFT |
1 << CHANNEL_BACK_RIGHT;
static constexpr ChannelMap L3F2_BACK_LFE_MAP =
L3F2_BACK_MAP | 1 << CHANNEL_LFE;
static constexpr ChannelMap L3F3R_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE |
1 << CHANNEL_BACK_CENTER | 1 << CHANNEL_SIDE_LEFT |
1 << CHANNEL_SIDE_RIGHT;
static ChannelLayout L3F4_LFE;
static constexpr ChannelMap L3F4_LFE_MAP =
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_BACK_LEFT |
1 << CHANNEL_BACK_RIGHT | 1 << CHANNEL_SIDE_LEFT |
1 << CHANNEL_SIDE_RIGHT;
// 3F4_LFE Alias
static ChannelLayout L7POINT1_SURROUND;
static constexpr ChannelMap L7POINT1_SURROUND_MAP = L3F4_LFE_MAP;
// Statically check that we can static_cast a Gecko ChannelLayout to a
// cubeb_channel_layout.
static_assert(CUBEB_LAYOUT_UNDEFINED == UNKNOWN_MAP);
static_assert(CUBEB_LAYOUT_MONO == LMONO_MAP);
static_assert(CUBEB_LAYOUT_MONO_LFE == LMONO_LFE_MAP);
static_assert(CUBEB_LAYOUT_STEREO == LSTEREO_MAP);
static_assert(CUBEB_LAYOUT_STEREO_LFE == LSTEREO_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F == L3F_MAP);
static_assert(CUBEB_LAYOUT_3F_LFE == L3F_LFE_MAP);
static_assert(CUBEB_LAYOUT_2F1 == L2F1_MAP);
static_assert(CUBEB_LAYOUT_2F1_LFE == L2F1_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F1 == L3F1_MAP);
static_assert(CUBEB_LAYOUT_3F1_LFE == L3F1_LFE_MAP);
static_assert(CUBEB_LAYOUT_2F2 == L2F2_MAP);
static_assert(CUBEB_LAYOUT_3F2_LFE == L3F2_LFE_MAP);
static_assert(CUBEB_LAYOUT_QUAD == LQUAD_MAP);
static_assert(CUBEB_LAYOUT_QUAD_LFE == LQUAD_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F2 == L3F2_MAP);
static_assert(CUBEB_LAYOUT_3F2_LFE == L3F2_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F2_BACK == L3F2_BACK_MAP);
static_assert(CUBEB_LAYOUT_3F2_LFE_BACK == L3F2_BACK_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F3R_LFE == L3F3R_LFE_MAP);
static_assert(CUBEB_LAYOUT_3F4_LFE == L3F4_LFE_MAP);
private:
void UpdateChannelMap();
const Channel* DefaultLayoutForChannels(uint32_t aChannels) const;
CopyableAutoTArray<Channel, MAX_CHANNELS> mChannels;
ChannelMap mChannelMap;
bool mValid;
};
enum SampleFormat {
FORMAT_NONE = 0,
FORMAT_U8,
FORMAT_S16,
FORMAT_S24LSB,
FORMAT_S24,
FORMAT_S32,
FORMAT_FLT,
# if defined(MOZ_SAMPLE_TYPE_FLOAT32)
FORMAT_DEFAULT = FORMAT_FLT
# elif defined(MOZ_SAMPLE_TYPE_S16)
FORMAT_DEFAULT = FORMAT_S16
# else
# error "Not supported audio type"
# endif
};
AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aRate,
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
bool aInterleaved = true);
AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aChannels,
uint32_t aRate,
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
bool aInterleaved = true);
// Will create a channel configuration from default SMPTE ordering.
AudioConfig(uint32_t aChannels, uint32_t aRate,
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
bool aInterleaved = true);
const ChannelLayout& Layout() const { return mChannelLayout; }
uint32_t Channels() const {
if (!mChannelLayout.IsValid()) {
return mChannels;
}
return mChannelLayout.Count();
}
uint32_t Rate() const { return mRate; }
SampleFormat Format() const { return mFormat; }
bool Interleaved() const { return mInterleaved; }
bool operator==(const AudioConfig& aOther) const {
return mChannelLayout == aOther.mChannelLayout && mRate == aOther.mRate &&
mFormat == aOther.mFormat && mInterleaved == aOther.mInterleaved;
}
bool operator!=(const AudioConfig& aOther) const {
return !(*this == aOther);
}
bool IsValid() const {
return mChannelLayout.IsValid() && Format() != FORMAT_NONE && Rate() > 0;
}
static const char* FormatToString(SampleFormat aFormat);
static uint32_t SampleSize(SampleFormat aFormat);
static uint32_t FormatToBits(SampleFormat aFormat);
private:
// Channels configuration.
ChannelLayout mChannelLayout;
// Channel count.
uint32_t mChannels;
// Sample rate.
uint32_t mRate;
// Sample format.
SampleFormat mFormat;
bool mInterleaved;
};
} // namespace mozilla
#endif // AudioLayout_h
|
