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
|
// 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 "content/browser/renderer_host/media/audio_input_device_manager.h"
#include "base/bind.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/renderer_host/media/audio_input_device_manager_event_handler.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/media_stream_request.h"
#include "media/audio/audio_device_name.h"
#include "media/audio/audio_input_ipc.h"
#include "media/audio/audio_manager_base.h"
#include "media/audio/audio_util.h"
#include "media/base/channel_layout.h"
namespace content {
const int AudioInputDeviceManager::kFakeOpenSessionId = 1;
namespace {
// Starting id for the first capture session.
const int kFirstSessionId = AudioInputDeviceManager::kFakeOpenSessionId + 1;
}
AudioInputDeviceManager::AudioInputDeviceManager(
media::AudioManager* audio_manager)
: listener_(NULL),
next_capture_session_id_(kFirstSessionId),
use_fake_device_(false),
audio_manager_(audio_manager) {
}
AudioInputDeviceManager::~AudioInputDeviceManager() {
}
void AudioInputDeviceManager::Register(
MediaStreamProviderListener* listener,
base::MessageLoopProxy* device_thread_loop) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(!listener_);
DCHECK(!device_loop_);
listener_ = listener;
device_loop_ = device_thread_loop;
}
void AudioInputDeviceManager::Unregister() {
DCHECK(listener_);
listener_ = NULL;
}
void AudioInputDeviceManager::EnumerateDevices(MediaStreamType stream_type) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::EnumerateOnDeviceThread,
this, stream_type));
}
int AudioInputDeviceManager::Open(const StreamDeviceInfo& device) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Generate a new id for this device.
int session_id = next_capture_session_id_++;
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::OpenOnDeviceThread,
this, session_id, device));
return session_id;
}
void AudioInputDeviceManager::Close(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
// Check if the device has been stopped, if not, send stop signal.
EventHandlerMap::iterator it = event_handlers_.find(session_id);
if (it != event_handlers_.end()) {
it->second->OnDeviceStopped(session_id);
event_handlers_.erase(it);
}
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::CloseOnDeviceThread,
this, session_id));
}
void AudioInputDeviceManager::Start(
int session_id, AudioInputDeviceManagerEventHandler* handler) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(handler);
// Solution for not using MediaStreamManager. This is needed when Start() is
// called without using Open(), we post default device for test purpose.
// And we do not store the info for the kFakeOpenSessionId but return
// the callback immediately.
if (session_id == kFakeOpenSessionId) {
handler->OnDeviceStarted(session_id,
media::AudioManagerBase::kDefaultDeviceId);
return;
}
// Look up the device_id of the session so we can notify the renderer that
// the device has started. If the session has not been started,
// use the empty device_id to indicate that Start() failed.
std::string device_id;
if (event_handlers_.insert(std::make_pair(session_id, handler)).second) {
StreamDeviceMap::const_iterator it = devices_.find(session_id);
if (it != devices_.end())
device_id = it->second.device.id;
}
// Post a callback through the AudioInputRendererHost to notify the renderer
// that the device has started.
handler->OnDeviceStarted(session_id, device_id);
}
void AudioInputDeviceManager::Stop(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Erase the event handler referenced by the session_id.
event_handlers_.erase(session_id);
}
void AudioInputDeviceManager::UseFakeDevice() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
use_fake_device_ = true;
}
bool AudioInputDeviceManager::ShouldUseFakeDevice() const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
return use_fake_device_;
}
void AudioInputDeviceManager::EnumerateOnDeviceThread(
MediaStreamType stream_type) {
DCHECK(IsOnDeviceThread());
media::AudioDeviceNames device_names;
switch (stream_type) {
case MEDIA_DEVICE_AUDIO_CAPTURE:
// AudioManager is guaranteed to outlive MediaStreamManager in
// BrowserMainloop.
audio_manager_->GetAudioInputDeviceNames(&device_names);
break;
default:
NOTREACHED();
break;
}
scoped_ptr<StreamDeviceInfoArray> devices(new StreamDeviceInfoArray());
for (media::AudioDeviceNames::iterator it = device_names.begin();
it != device_names.end(); ++it) {
// Get the preferred sample rate and channel configuration for the
// current audio device.
int sample_rate =
media::GetAudioInputHardwareSampleRate(it->unique_id);
media::ChannelLayout channel_layout =
media::GetAudioInputHardwareChannelLayout(it->unique_id);
// Add device information to device vector.
devices->push_back(StreamDeviceInfo(
stream_type, it->device_name, it->unique_id, sample_rate,
channel_layout, false));
}
// Return the device list through the listener by posting a task on
// IO thread since MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::DevicesEnumeratedOnIOThread,
this, stream_type, base::Passed(&devices)));
}
void AudioInputDeviceManager::OpenOnDeviceThread(
int session_id, const StreamDeviceInfo& device) {
DCHECK(IsOnDeviceThread());
// Add the session_id and device to the map.
if (!devices_.insert(std::make_pair(session_id, device)).second) {
NOTREACHED();
devices_[session_id] = device;
}
// Return the |session_id| through the listener by posting a task on
// IO thread since MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::OpenedOnIOThread,
this, device.device.type, session_id));
}
void AudioInputDeviceManager::CloseOnDeviceThread(int session_id) {
DCHECK(IsOnDeviceThread());
StreamDeviceMap::iterator it = devices_.find(session_id);
if (it == devices_.end())
return;
const MediaStreamType stream_type = it->second.device.type;
devices_.erase(it);
// Post a callback through the listener on IO thread since
// MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::ClosedOnIOThread,
this, stream_type, session_id));
}
void AudioInputDeviceManager::DevicesEnumeratedOnIOThread(
MediaStreamType stream_type,
scoped_ptr<StreamDeviceInfoArray> devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Ensure that |devices| gets deleted on exit.
if (listener_)
listener_->DevicesEnumerated(stream_type, *devices);
}
void AudioInputDeviceManager::OpenedOnIOThread(MediaStreamType stream_type,
int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Opened(stream_type, session_id);
}
void AudioInputDeviceManager::ClosedOnIOThread(MediaStreamType stream_type,
int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Closed(stream_type, session_id);
}
bool AudioInputDeviceManager::IsOnDeviceThread() const {
return device_loop_->BelongsToCurrentThread();
}
} // namespace content
|
