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
|
--- media/audio/sndio/audio_manager_sndio.cc.orig 2024-06-26 15:43:18 UTC
+++ media/audio/sndio/audio_manager_sndio.cc
@@ -0,0 +1,241 @@
+// 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 "base/command_line.h"
+#include "base/metrics/histogram_macros.h"
+#include "base/memory/ptr_util.h"
+
+#include "media/audio/sndio/audio_manager_sndio.h"
+
+#include "media/audio/audio_device_description.h"
+#include "media/audio/audio_output_dispatcher.h"
+#if defined(USE_SNDIO)
+#include "media/audio/sndio/sndio_input.h"
+#include "media/audio/sndio/sndio_output.h"
+#endif
+#if defined(USE_PULSEAUDIO)
+#include "media/audio/pulse/audio_manager_pulse.h"
+#include "media/audio/pulse/pulse_util.h"
+#endif
+#if defined(USE_ALSA)
+#include "media/audio/alsa/audio_manager_alsa.h"
+#endif
+#include "media/audio/fake_audio_manager.h"
+#include "media/base/limits.h"
+#include "media/base/media_switches.h"
+
+namespace media {
+
+#if defined(USE_SNDIO)
+// Maximum number of output streams that can be open simultaneously.
+static const int kMaxOutputStreams = 50;
+
+// Default sample rate for input and output streams.
+static const int kDefaultSampleRate = 48000;
+
+#if BUILDFLAG(IS_OPENBSD)
+static const std::string kDefaultAudioBackend = "sndio";
+#else
+static const std::string kDefaultAudioBackend = "auto";
+#endif
+
+void AddDefaultDevice(AudioDeviceNames* device_names) {
+ DCHECK(device_names->empty());
+ device_names->push_front(AudioDeviceName::CreateDefault());
+}
+
+bool AudioManagerSndio::HasAudioOutputDevices() {
+ return true;
+}
+
+bool AudioManagerSndio::HasAudioInputDevices() {
+ return true;
+}
+
+void AudioManagerSndio::GetAudioInputDeviceNames(
+ AudioDeviceNames* device_names) {
+ DCHECK(device_names->empty());
+ AddDefaultDevice(device_names);
+}
+
+void AudioManagerSndio::GetAudioOutputDeviceNames(
+ AudioDeviceNames* device_names) {
+ AddDefaultDevice(device_names);
+}
+
+#if defined(USE_SNDIO)
+const char* AudioManagerSndio::GetName() {
+ return "SNDIO";
+}
+#endif
+
+AudioParameters AudioManagerSndio::GetInputStreamParameters(
+ const std::string& device_id) {
+ static const int kDefaultInputBufferSize = 1024;
+
+ int user_buffer_size = GetUserBufferSize();
+ int buffer_size = user_buffer_size ?
+ user_buffer_size : kDefaultInputBufferSize;
+
+ return AudioParameters(
+ AudioParameters::AUDIO_PCM_LOW_LATENCY, ChannelLayoutConfig::Stereo(),
+ kDefaultSampleRate, buffer_size);
+}
+
+AudioManagerSndio::AudioManagerSndio(std::unique_ptr<AudioThread> audio_thread,
+ AudioLogFactory* audio_log_factory)
+ : AudioManagerBase(std::move(audio_thread),
+ audio_log_factory) {
+ DLOG(WARNING) << "AudioManagerSndio";
+ SetMaxOutputStreamsAllowed(kMaxOutputStreams);
+}
+
+AudioManagerSndio::~AudioManagerSndio() = default;
+
+AudioOutputStream* AudioManagerSndio::MakeLinearOutputStream(
+ const AudioParameters& params,
+ const LogCallback& log_callback) {
+ DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
+ return MakeOutputStream(params);
+}
+
+AudioOutputStream* AudioManagerSndio::MakeLowLatencyOutputStream(
+ const AudioParameters& params,
+ const std::string& device_id,
+ const LogCallback& log_callback) {
+ DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!";
+ DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
+ return MakeOutputStream(params);
+}
+
+AudioInputStream* AudioManagerSndio::MakeLinearInputStream(
+ const AudioParameters& params,
+ const std::string& device_id,
+ const LogCallback& log_callback) {
+ DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
+ return MakeInputStream(params);
+}
+
+AudioInputStream* AudioManagerSndio::MakeLowLatencyInputStream(
+ const AudioParameters& params,
+ const std::string& device_id,
+ const LogCallback& log_callback) {
+ DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
+ return MakeInputStream(params);
+}
+
+AudioParameters AudioManagerSndio::GetPreferredOutputStreamParameters(
+ const std::string& output_device_id,
+ const AudioParameters& input_params) {
+ // TODO(tommi): Support |output_device_id|.
+ DLOG_IF(ERROR, !output_device_id.empty()) << "Not implemented!";
+ static const int kDefaultOutputBufferSize = 2048;
+
+ ChannelLayoutConfig channel_layout_config = ChannelLayoutConfig::Stereo();
+ int sample_rate = kDefaultSampleRate;
+ int buffer_size = kDefaultOutputBufferSize;
+ if (input_params.IsValid()) {
+ sample_rate = input_params.sample_rate();
+ channel_layout_config = input_params.channel_layout_config();
+ buffer_size = std::min(buffer_size, input_params.frames_per_buffer());
+ }
+
+ int user_buffer_size = GetUserBufferSize();
+ if (user_buffer_size)
+ buffer_size = user_buffer_size;
+
+ return AudioParameters(
+ AudioParameters::AUDIO_PCM_LOW_LATENCY,
+ channel_layout_config, sample_rate, buffer_size);
+}
+
+AudioInputStream* AudioManagerSndio::MakeInputStream(
+ const AudioParameters& params) {
+ DLOG(WARNING) << "MakeInputStream";
+ return new SndioAudioInputStream(this,
+ AudioDeviceDescription::kDefaultDeviceId, params);
+}
+
+AudioOutputStream* AudioManagerSndio::MakeOutputStream(
+ const AudioParameters& params) {
+ DLOG(WARNING) << "MakeOutputStream";
+ return new SndioAudioOutputStream(params, this);
+}
+#endif
+
+std::unique_ptr<media::AudioManager> CreateAudioManager(
+ std::unique_ptr<AudioThread> audio_thread,
+ AudioLogFactory* audio_log_factory) {
+ DLOG(WARNING) << "CreateAudioManager";
+ std::string audio_backend = kDefaultAudioBackend;
+
+ std::vector<std::string> kSupportedAudioBackends = {"auto"};
+
+#if defined(USE_SNDIO)
+ kSupportedAudioBackends.push_back(std::string("sndio"));
+#endif
+#if defined(USE_PULSEAUDIO)
+ kSupportedAudioBackends.push_back(std::string("pulse"));
+#endif
+#if defined(USE_ALSA)
+ kSupportedAudioBackends.push_back(std::string("alsa"));
+#endif
+
+ if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+ switches::kAudioBackend)) {
+ audio_backend = base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+ switches::kAudioBackend);
+ }
+
+ // For testing allow audio output to be disabled.
+ if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+ switches::kDisableAudioOutput)) {
+ return std::make_unique<FakeAudioManager>(std::move(audio_thread),
+ audio_log_factory);
+ }
+
+ if (std::find(std::begin(kSupportedAudioBackends), std::end(kSupportedAudioBackends),
+ audio_backend) == std::end(kSupportedAudioBackends)) {
+ LOG(ERROR) << "Unsupported audio backend specified. Falling back to " << kDefaultAudioBackend;
+ audio_backend = kDefaultAudioBackend;
+ }
+
+#if defined(USE_PULSEAUDIO)
+ pa_threaded_mainloop* pa_mainloop = nullptr;
+ pa_context* pa_context = nullptr;
+ if ((audio_backend != "sndio" && audio_backend != "alsa") &&
+ pulse::InitPulse(&pa_mainloop, &pa_context)) {
+ return std::make_unique<AudioManagerPulse>(
+ std::move(audio_thread), audio_log_factory, pa_mainloop, pa_context);
+ } else if (audio_backend == "auto") {
+ LOG(WARNING) << "Falling back to SNDIO for audio output. PulseAudio is not "
+ "available or could not be initialized.";
+ }
+#endif
+
+#if defined(USE_SNDIO)
+ if (audio_backend != "pulse" && audio_backend != "alsa") {
+ return std::make_unique<AudioManagerSndio>(std::move(audio_thread),
+ audio_log_factory);
+ } else if (audio_backend == "auto") {
+ LOG(WARNING) << "Falling back to ALSA audio output. SNDIO is not "
+ "available or could not be initialized.";
+ }
+#endif
+
+#if defined(USE_ALSA)
+ if (audio_backend != "pulse" && audio_backend != "sndio") {
+ return std::make_unique<AudioManagerAlsa>(std::move(audio_thread),
+ audio_log_factory);
+ } else if (audio_backend == "auto") {
+ LOG(WARNING) << "Falling back to fake audio output. ALSA is not "
+ "available or could not be initialized.";
+ }
+#endif
+
+ return std::make_unique<FakeAudioManager>(std::move(audio_thread),
+ audio_log_factory);
+}
+
+} // namespace media
|
