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1 /* | 1 /* |
2 * Copyright (C) 2011, Google Inc. All rights reserved. | 2 * Copyright (C) 2011, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 */ | 23 */ |
24 | 24 |
25 #include "config.h" | 25 #include "config.h" |
26 #if ENABLE(WEB_AUDIO) | 26 #if ENABLE(WEB_AUDIO) |
27 #include "modules/webaudio/OfflineAudioDestinationNode.h" | 27 #include "modules/webaudio/OfflineAudioDestinationNode.h" |
28 | 28 |
29 #include "core/dom/CrossThreadTask.h" | 29 #include "core/dom/CrossThreadTask.h" |
30 #include "modules/webaudio/AudioContext.h" | 30 #include "modules/webaudio/AudioContext.h" |
| 31 #include "modules/webaudio/OfflineAudioContext.h" |
31 #include "platform/Task.h" | 32 #include "platform/Task.h" |
32 #include "platform/audio/AudioBus.h" | 33 #include "platform/audio/AudioBus.h" |
33 #include "platform/audio/HRTFDatabaseLoader.h" | 34 #include "platform/audio/HRTFDatabaseLoader.h" |
34 #include "public/platform/Platform.h" | 35 #include "public/platform/Platform.h" |
35 #include <algorithm> | 36 #include <algorithm> |
36 | 37 |
37 namespace blink { | 38 namespace blink { |
38 | 39 |
39 const size_t renderQuantumSize = 128; | 40 const size_t renderQuantumSize = 128; |
40 | 41 |
41 OfflineAudioDestinationHandler::OfflineAudioDestinationHandler(AudioNode& node,
AudioBuffer* renderTarget) | 42 OfflineAudioDestinationHandler::OfflineAudioDestinationHandler(AudioNode& node,
AudioBuffer* renderTarget) |
42 : AudioDestinationHandler(node, renderTarget->sampleRate()) | 43 : AudioDestinationHandler(node, renderTarget->sampleRate()) |
43 , m_renderTarget(renderTarget) | 44 , m_renderTarget(renderTarget) |
44 , m_startedRendering(false) | 45 , m_framesProcessed(0) |
| 46 , m_framesToProcess(0) |
45 { | 47 { |
46 m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuant
umSize); | 48 m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuant
umSize); |
47 } | 49 } |
48 | 50 |
49 PassRefPtr<OfflineAudioDestinationHandler> OfflineAudioDestinationHandler::creat
e(AudioNode& node, AudioBuffer* renderTarget) | 51 PassRefPtr<OfflineAudioDestinationHandler> OfflineAudioDestinationHandler::creat
e(AudioNode& node, AudioBuffer* renderTarget) |
50 { | 52 { |
51 return adoptRef(new OfflineAudioDestinationHandler(node, renderTarget)); | 53 return adoptRef(new OfflineAudioDestinationHandler(node, renderTarget)); |
52 } | 54 } |
53 | 55 |
54 OfflineAudioDestinationHandler::~OfflineAudioDestinationHandler() | 56 OfflineAudioDestinationHandler::~OfflineAudioDestinationHandler() |
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81 AudioHandler::uninitialize(); | 83 AudioHandler::uninitialize(); |
82 } | 84 } |
83 | 85 |
84 void OfflineAudioDestinationHandler::startRendering() | 86 void OfflineAudioDestinationHandler::startRendering() |
85 { | 87 { |
86 ASSERT(isMainThread()); | 88 ASSERT(isMainThread()); |
87 ASSERT(m_renderTarget); | 89 ASSERT(m_renderTarget); |
88 if (!m_renderTarget) | 90 if (!m_renderTarget) |
89 return; | 91 return; |
90 | 92 |
91 if (!m_startedRendering) { | 93 // Rendering was not started. Starting now. |
92 m_startedRendering = true; | 94 if (!m_renderThread) { |
93 m_renderThread = adoptPtr(Platform::current()->createThread("Offline Aud
io Renderer")); | 95 m_renderThread = adoptPtr(Platform::current()->createThread("Offline Aud
io Renderer")); |
94 m_renderThread->postTask(FROM_HERE, new Task(threadSafeBind(&OfflineAudi
oDestinationHandler::offlineRender, PassRefPtr<OfflineAudioDestinationHandler>(t
his)))); | 96 m_renderThread->postTask(FROM_HERE, new Task(threadSafeBind(&OfflineAudi
oDestinationHandler::startOfflineRendering, this))); |
| 97 return; |
95 } | 98 } |
| 99 |
| 100 // Rendering is already started, which implicitly means we resume the |
| 101 // rendering by calling |runOfflineRendering| on m_renderThread. |
| 102 m_renderThread->postTask(FROM_HERE, threadSafeBind(&OfflineAudioDestinationH
andler::runOfflineRendering, this)); |
96 } | 103 } |
97 | 104 |
98 void OfflineAudioDestinationHandler::stopRendering() | 105 void OfflineAudioDestinationHandler::stopRendering() |
99 { | 106 { |
100 ASSERT_NOT_REACHED(); | 107 ASSERT_NOT_REACHED(); |
101 } | 108 } |
102 | 109 |
103 void OfflineAudioDestinationHandler::offlineRender() | 110 size_t OfflineAudioDestinationHandler::quantizeTimeToRenderQuantum(double when)
const |
104 { | 111 { |
105 offlineRenderInternal(); | 112 ASSERT(when >= 0); |
106 context()->handlePostRenderTasks(); | 113 |
| 114 size_t whenAsFrame = when * sampleRate(); |
| 115 return whenAsFrame - (whenAsFrame % renderQuantumSize); |
107 } | 116 } |
108 | 117 |
109 void OfflineAudioDestinationHandler::offlineRenderInternal() | 118 void OfflineAudioDestinationHandler::startOfflineRendering() |
110 { | 119 { |
111 ASSERT(!isMainThread()); | 120 ASSERT(!isMainThread()); |
| 121 |
112 ASSERT(m_renderBus); | 122 ASSERT(m_renderBus); |
113 if (!m_renderBus) | 123 if (!m_renderBus) |
114 return; | 124 return; |
115 | 125 |
116 bool isAudioContextInitialized = context()->isInitialized(); | 126 bool isAudioContextInitialized = context()->isInitialized(); |
117 ASSERT(isAudioContextInitialized); | 127 ASSERT(isAudioContextInitialized); |
118 if (!isAudioContextInitialized) | 128 if (!isAudioContextInitialized) |
119 return; | 129 return; |
120 | 130 |
121 bool channelsMatch = m_renderBus->numberOfChannels() == m_renderTarget->numb
erOfChannels(); | 131 bool channelsMatch = m_renderBus->numberOfChannels() == m_renderTarget->numb
erOfChannels(); |
122 ASSERT(channelsMatch); | 132 ASSERT(channelsMatch); |
123 if (!channelsMatch) | 133 if (!channelsMatch) |
124 return; | 134 return; |
125 | 135 |
126 bool isRenderBusAllocated = m_renderBus->length() >= renderQuantumSize; | 136 bool isRenderBusAllocated = m_renderBus->length() >= renderQuantumSize; |
127 ASSERT(isRenderBusAllocated); | 137 ASSERT(isRenderBusAllocated); |
128 if (!isRenderBusAllocated) | 138 if (!isRenderBusAllocated) |
129 return; | 139 return; |
130 | 140 |
131 // Break up the render target into smaller "render quantize" sized pieces. | 141 m_framesToProcess = m_renderTarget->length(); |
132 // Render until we're finished. | 142 |
133 size_t framesToProcess = m_renderTarget->length(); | 143 // Start rendering. |
| 144 runOfflineRendering(); |
| 145 } |
| 146 |
| 147 void OfflineAudioDestinationHandler::runOfflineRendering() |
| 148 { |
| 149 ASSERT(!isMainThread()); |
| 150 |
134 unsigned numberOfChannels = m_renderTarget->numberOfChannels(); | 151 unsigned numberOfChannels = m_renderTarget->numberOfChannels(); |
135 | 152 |
136 unsigned n = 0; | 153 // If there is more to process and there is no suspension at the moment, |
137 while (framesToProcess > 0) { | 154 // do continue to render quanta. If there is a suspend scheduled at the |
138 // Render one render quantum. | 155 // current sample frame, stop the render loop and put the context into the |
| 156 // suspended state. Then calling OfflineAudioContext.resume() will pick up |
| 157 // the render loop again from where it was suspended. |
| 158 while (m_framesToProcess > 0 && !context()->shouldSuspendNow()) { |
| 159 |
| 160 // Render one render quantum. Note that this includes pre/post render |
| 161 // tasks from the online audio context. |
139 render(0, m_renderBus.get(), renderQuantumSize); | 162 render(0, m_renderBus.get(), renderQuantumSize); |
140 | 163 |
141 size_t framesAvailableToCopy = std::min(framesToProcess, renderQuantumSi
ze); | 164 size_t framesAvailableToCopy = std::min(m_framesToProcess, renderQuantum
Size); |
142 | 165 |
143 for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++chann
elIndex) { | 166 for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++chann
elIndex) { |
144 const float* source = m_renderBus->channel(channelIndex)->data(); | 167 const float* source = m_renderBus->channel(channelIndex)->data(); |
145 float* destination = m_renderTarget->getChannelData(channelIndex)->d
ata(); | 168 float* destination = m_renderTarget->getChannelData(channelIndex)->d
ata(); |
146 memcpy(destination + n, source, sizeof(float) * framesAvailableToCop
y); | 169 memcpy(destination + m_framesProcessed, source, sizeof(float) * fram
esAvailableToCopy); |
147 } | 170 } |
148 | 171 |
149 n += framesAvailableToCopy; | 172 m_framesProcessed += framesAvailableToCopy; |
150 framesToProcess -= framesAvailableToCopy; | 173 m_framesToProcess -= framesAvailableToCopy; |
151 } | 174 } |
152 | 175 |
| 176 // Finish up the rendering loop if there is no more to process. |
| 177 if (m_framesToProcess <= 0) { |
| 178 finishOfflineRendering(); |
| 179 return; |
| 180 } |
| 181 |
| 182 // Otherwise resolve pending suspend promises. |
| 183 context()->resolvePendingSuspendPromises(); |
| 184 } |
| 185 |
| 186 void OfflineAudioDestinationHandler::finishOfflineRendering() |
| 187 { |
| 188 ASSERT(!isMainThread()); |
| 189 |
| 190 // Perform post-render tasks once more. |
| 191 context()->handlePostRenderTasks(); |
| 192 |
153 // Our work is done. Let the AudioContext know. | 193 // Our work is done. Let the AudioContext know. |
154 if (context()->executionContext()) | 194 if (context()->executionContext()) |
155 context()->executionContext()->postTask(FROM_HERE, createCrossThreadTask
(&OfflineAudioDestinationHandler::notifyComplete, PassRefPtr<OfflineAudioDestina
tionHandler>(this))); | 195 context()->executionContext()->postTask(FROM_HERE, createCrossThreadTask
(&OfflineAudioDestinationHandler::notifyComplete, this)); |
156 } | 196 } |
157 | 197 |
158 void OfflineAudioDestinationHandler::notifyComplete() | 198 void OfflineAudioDestinationHandler::notifyComplete() |
159 { | 199 { |
160 // The AudioContext might be gone. | 200 // The OfflineAudioContext might be gone. |
161 if (context()) | 201 if (context()) |
162 context()->fireCompletionEvent(); | 202 context()->fireCompletionEvent(); |
163 } | 203 } |
164 | 204 |
165 // ---------------------------------------------------------------- | 205 // ---------------------------------------------------------------- |
166 | 206 |
167 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext& context,
AudioBuffer* renderTarget) | 207 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext& context,
AudioBuffer* renderTarget) |
168 : AudioDestinationNode(context) | 208 : AudioDestinationNode(context) |
169 { | 209 { |
170 setHandler(OfflineAudioDestinationHandler::create(*this, renderTarget)); | 210 setHandler(OfflineAudioDestinationHandler::create(*this, renderTarget)); |
171 } | 211 } |
172 | 212 |
173 OfflineAudioDestinationNode* OfflineAudioDestinationNode::create(AudioContext* c
ontext, AudioBuffer* renderTarget) | 213 OfflineAudioDestinationNode* OfflineAudioDestinationNode::create(AudioContext* c
ontext, AudioBuffer* renderTarget) |
174 { | 214 { |
175 return new OfflineAudioDestinationNode(*context, renderTarget); | 215 return new OfflineAudioDestinationNode(*context, renderTarget); |
176 } | 216 } |
177 | 217 |
178 } // namespace blink | 218 } // namespace blink |
179 | 219 |
180 #endif // ENABLE(WEB_AUDIO) | 220 #endif // ENABLE(WEB_AUDIO) |
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