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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/audio/null_audio_sink.h" | 5 #include "media/audio/null_audio_sink.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/threading/platform_thread.h" | 8 #include "base/threading/platform_thread.h" |
9 | 9 |
10 namespace media { | 10 namespace media { |
11 | 11 |
12 NullAudioSink::NullAudioSink() | 12 NullAudioSink::NullAudioSink() |
13 : initialized_(false), | 13 : initialized_(false), |
14 playback_rate_(0.0), | 14 playback_rate_(0.0), |
15 playing_(false), | 15 playing_(false), |
16 callback_(NULL), | 16 callback_(NULL), |
17 thread_("NullAudioThread") { | 17 thread_("NullAudioThread") { |
18 } | 18 } |
19 | 19 |
20 NullAudioSink::~NullAudioSink() { | 20 void NullAudioSink::Initialize(const AudioParameters& params, |
21 DCHECK(!thread_.IsRunning()); | 21 RenderCallback* callback) { |
22 for (size_t i = 0; i < audio_data_.size(); ++i) | 22 DCHECK(!initialized_); |
23 delete [] audio_data_[i]; | 23 params_ = params; |
| 24 |
| 25 audio_data_.reserve(params.channels()); |
| 26 for (int i = 0; i < params.channels(); ++i) { |
| 27 float* channel_data = new float[params.frames_per_buffer()]; |
| 28 audio_data_.push_back(channel_data); |
| 29 } |
| 30 |
| 31 callback_ = callback; |
| 32 initialized_ = true; |
24 } | 33 } |
25 | 34 |
26 void NullAudioSink::Start() { | 35 void NullAudioSink::Start() { |
27 if (!thread_.Start()) | 36 if (!thread_.Start()) |
28 return; | 37 return; |
29 | 38 |
30 thread_.message_loop()->PostTask(FROM_HERE, base::Bind( | 39 thread_.message_loop()->PostTask(FROM_HERE, base::Bind( |
31 &NullAudioSink::FillBufferTask, this)); | 40 &NullAudioSink::FillBufferTask, this)); |
32 } | 41 } |
33 | 42 |
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57 void NullAudioSink::GetVolume(double* volume) { | 66 void NullAudioSink::GetVolume(double* volume) { |
58 // Audio is always muted. | 67 // Audio is always muted. |
59 *volume = 0.0; | 68 *volume = 0.0; |
60 } | 69 } |
61 | 70 |
62 void NullAudioSink::SetPlaying(bool is_playing) { | 71 void NullAudioSink::SetPlaying(bool is_playing) { |
63 base::AutoLock auto_lock(lock_); | 72 base::AutoLock auto_lock(lock_); |
64 playing_ = is_playing; | 73 playing_ = is_playing; |
65 } | 74 } |
66 | 75 |
67 void NullAudioSink::Initialize(const AudioParameters& params, | 76 NullAudioSink::~NullAudioSink() { |
68 RenderCallback* callback) { | 77 DCHECK(!thread_.IsRunning()); |
69 DCHECK(!initialized_); | 78 for (size_t i = 0; i < audio_data_.size(); ++i) |
70 params_ = params; | 79 delete [] audio_data_[i]; |
71 | |
72 audio_data_.reserve(params.channels()); | |
73 for (int i = 0; i < params.channels(); ++i) { | |
74 float* channel_data = new float[params.frames_per_buffer()]; | |
75 audio_data_.push_back(channel_data); | |
76 } | |
77 | |
78 callback_ = callback; | |
79 initialized_ = true; | |
80 } | 80 } |
81 | 81 |
82 void NullAudioSink::FillBufferTask() { | 82 void NullAudioSink::FillBufferTask() { |
83 base::AutoLock auto_lock(lock_); | 83 base::AutoLock auto_lock(lock_); |
84 | 84 |
85 base::TimeDelta delay; | 85 base::TimeDelta delay; |
86 // Only consume buffers when actually playing. | 86 // Only consume buffers when actually playing. |
87 if (playing_) { | 87 if (playing_) { |
88 DCHECK_GT(playback_rate_, 0.0f); | 88 DCHECK_GT(playback_rate_, 0.0f); |
89 int requested_frames = params_.frames_per_buffer(); | 89 int requested_frames = params_.frames_per_buffer(); |
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100 } | 100 } |
101 | 101 |
102 // Sleep for at least one millisecond so we don't spin the CPU. | 102 // Sleep for at least one millisecond so we don't spin the CPU. |
103 MessageLoop::current()->PostDelayedTask( | 103 MessageLoop::current()->PostDelayedTask( |
104 FROM_HERE, | 104 FROM_HERE, |
105 base::Bind(&NullAudioSink::FillBufferTask, this), | 105 base::Bind(&NullAudioSink::FillBufferTask, this), |
106 std::max(delay, base::TimeDelta::FromMilliseconds(1))); | 106 std::max(delay, base::TimeDelta::FromMilliseconds(1))); |
107 } | 107 } |
108 | 108 |
109 } // namespace media | 109 } // namespace media |
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