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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/fake_audio_input_stream.h" | 5 #include "media/audio/fake_audio_input_stream.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/lazy_instance.h" | 8 #include "base/lazy_instance.h" |
9 #include "media/audio/audio_manager_base.h" | 9 #include "media/audio/audio_manager_base.h" |
10 #include "media/base/audio_bus.h" | |
11 | 10 |
12 using base::TimeTicks; | 11 using base::TimeTicks; |
13 using base::TimeDelta; | 12 using base::TimeDelta; |
14 | 13 |
15 namespace media { | 14 namespace media { |
16 | 15 |
17 namespace { | 16 namespace { |
18 | 17 |
19 // These values are based on experiments for local-to-local | 18 // These values are based on experiments for local-to-local |
20 // PeerConnection to demonstrate audio/video synchronization. | 19 // PeerConnection to demonstrate audio/video synchronization. |
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42 AudioManagerBase* manager, | 41 AudioManagerBase* manager, |
43 const AudioParameters& params) { | 42 const AudioParameters& params) { |
44 return new FakeAudioInputStream(manager, params); | 43 return new FakeAudioInputStream(manager, params); |
45 } | 44 } |
46 | 45 |
47 FakeAudioInputStream::FakeAudioInputStream(AudioManagerBase* manager, | 46 FakeAudioInputStream::FakeAudioInputStream(AudioManagerBase* manager, |
48 const AudioParameters& params) | 47 const AudioParameters& params) |
49 : audio_manager_(manager), | 48 : audio_manager_(manager), |
50 callback_(NULL), | 49 callback_(NULL), |
51 buffer_size_((params.channels() * params.bits_per_sample() * | 50 buffer_size_((params.channels() * params.bits_per_sample() * |
52 params.frames_per_buffer()) / | 51 params.frames_per_buffer()) / 8), |
53 8), | |
54 params_(params), | 52 params_(params), |
55 thread_("FakeAudioRecordingThread"), | 53 thread_("FakeAudioRecordingThread"), |
56 callback_interval_(base::TimeDelta::FromMilliseconds( | 54 callback_interval_(base::TimeDelta::FromMilliseconds( |
57 (params.frames_per_buffer() * 1000) / params.sample_rate())), | 55 (params.frames_per_buffer() * 1000) / params.sample_rate())), |
58 beep_duration_in_buffers_(kBeepDurationMilliseconds * | 56 beep_duration_in_buffers_( |
59 params.sample_rate() / | 57 kBeepDurationMilliseconds * params.sample_rate() / |
60 params.frames_per_buffer() / | 58 params.frames_per_buffer() / 1000), |
61 1000), | |
62 beep_generated_in_buffers_(0), | 59 beep_generated_in_buffers_(0), |
63 beep_period_in_frames_(params.sample_rate() / kBeepFrequency), | 60 beep_period_in_frames_(params.sample_rate() / kBeepFrequency), |
64 frames_elapsed_(0), | 61 frames_elapsed_(0) { |
65 audio_bus_(AudioBus::Create(params)) { | |
66 } | 62 } |
67 | 63 |
68 FakeAudioInputStream::~FakeAudioInputStream() {} | 64 FakeAudioInputStream::~FakeAudioInputStream() {} |
69 | 65 |
70 bool FakeAudioInputStream::Open() { | 66 bool FakeAudioInputStream::Open() { |
71 buffer_.reset(new uint8[buffer_size_]); | 67 buffer_.reset(new uint8[buffer_size_]); |
72 memset(buffer_.get(), 0, buffer_size_); | 68 memset(buffer_.get(), 0, buffer_size_); |
73 audio_bus_->Zero(); | |
74 return true; | 69 return true; |
75 } | 70 } |
76 | 71 |
77 void FakeAudioInputStream::Start(AudioInputCallback* callback) { | 72 void FakeAudioInputStream::Start(AudioInputCallback* callback) { |
78 DCHECK(!thread_.IsRunning()); | 73 DCHECK(!thread_.IsRunning()); |
79 DCHECK(!callback_); | 74 DCHECK(!callback_); |
80 callback_ = callback; | 75 callback_ = callback; |
81 last_callback_time_ = TimeTicks::Now(); | 76 last_callback_time_ = TimeTicks::Now(); |
82 thread_.Start(); | 77 thread_.Start(); |
83 thread_.message_loop()->PostDelayedTask( | 78 thread_.message_loop()->PostDelayedTask( |
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139 memset(buffer_.get() + position, 128, high_bytes); | 134 memset(buffer_.get() + position, 128, high_bytes); |
140 // Then leave low values in the buffer with |high_bytes|. | 135 // Then leave low values in the buffer with |high_bytes|. |
141 position += high_bytes * 2; | 136 position += high_bytes * 2; |
142 } | 137 } |
143 | 138 |
144 ++beep_generated_in_buffers_; | 139 ++beep_generated_in_buffers_; |
145 if (beep_generated_in_buffers_ >= beep_duration_in_buffers_) | 140 if (beep_generated_in_buffers_ >= beep_duration_in_buffers_) |
146 beep_generated_in_buffers_ = 0; | 141 beep_generated_in_buffers_ = 0; |
147 } | 142 } |
148 | 143 |
149 audio_bus_->FromInterleaved( | 144 callback_->OnData(this, buffer_.get(), buffer_size_, buffer_size_, 1.0); |
150 buffer_.get(), audio_bus_->frames(), params_.bits_per_sample() / 8); | |
151 callback_->OnData(this, audio_bus_.get(), buffer_size_, 1.0); | |
152 frames_elapsed_ += params_.frames_per_buffer(); | 145 frames_elapsed_ += params_.frames_per_buffer(); |
153 | 146 |
154 thread_.message_loop()->PostDelayedTask( | 147 thread_.message_loop()->PostDelayedTask( |
155 FROM_HERE, | 148 FROM_HERE, |
156 base::Bind(&FakeAudioInputStream::DoCallback, base::Unretained(this)), | 149 base::Bind(&FakeAudioInputStream::DoCallback, base::Unretained(this)), |
157 next_callback_time); | 150 next_callback_time); |
158 } | 151 } |
159 | 152 |
160 void FakeAudioInputStream::Stop() { | 153 void FakeAudioInputStream::Stop() { |
161 thread_.Stop(); | 154 thread_.Stop(); |
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185 | 178 |
186 // static | 179 // static |
187 void FakeAudioInputStream::BeepOnce() { | 180 void FakeAudioInputStream::BeepOnce() { |
188 BeepContext* beep_context = g_beep_context.Pointer(); | 181 BeepContext* beep_context = g_beep_context.Pointer(); |
189 base::AutoLock auto_lock(beep_context->beep_lock); | 182 base::AutoLock auto_lock(beep_context->beep_lock); |
190 beep_context->beep_once = true; | 183 beep_context->beep_once = true; |
191 beep_context->automatic = false; | 184 beep_context->automatic = false; |
192 } | 185 } |
193 | 186 |
194 } // namespace media | 187 } // namespace media |
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