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
|
// Copyright (c) 2010 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/audio/audio_output_proxy.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/task.h"
#include "media/audio/audio_manager.h"
#include "media/audio/audio_output_dispatcher.h"
AudioOutputProxy::AudioOutputProxy(AudioOutputDispatcher* dispatcher)
: dispatcher_(dispatcher),
state_(kCreated),
physical_stream_(NULL),
volume_(1.0) {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
}
AudioOutputProxy::~AudioOutputProxy() {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
DCHECK(state_ == kCreated || state_ == kClosed);
DCHECK(!physical_stream_);
}
bool AudioOutputProxy::Open() {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
DCHECK_EQ(state_, kCreated);
if (!dispatcher_->StreamOpened()) {
state_ = kError;
return false;
}
state_ = kOpened;
return true;
}
void AudioOutputProxy::Start(AudioSourceCallback* callback) {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
DCHECK(physical_stream_ == NULL);
DCHECK_EQ(state_, kOpened);
physical_stream_= dispatcher_->StreamStarted();
if (!physical_stream_) {
state_ = kError;
callback->OnError(this, 0);
return;
}
physical_stream_->SetVolume(volume_);
physical_stream_->Start(callback);
state_ = kPlaying;
}
void AudioOutputProxy::Stop() {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
if (state_ != kPlaying)
return;
DCHECK(physical_stream_);
physical_stream_->Stop();
dispatcher_->StreamStopped(physical_stream_);
physical_stream_ = NULL;
state_ = kOpened;
}
void AudioOutputProxy::SetVolume(double volume) {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
volume_ = volume;
if (physical_stream_) {
physical_stream_->SetVolume(volume);
}
}
void AudioOutputProxy::GetVolume(double* volume) {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
*volume = volume_;
}
void AudioOutputProxy::Close() {
DCHECK_EQ(MessageLoop::current(), dispatcher_->message_loop());
DCHECK(state_ == kCreated || state_ == kError || state_ == kOpened);
DCHECK(!physical_stream_);
if (state_ != kCreated) {
dispatcher_->StreamClosed();
}
dispatcher_->message_loop()->DeleteSoon(FROM_HERE, this);
state_ = kClosed;
}
|
