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1 /* | 1 /* |
2 * Copyright (C) 2012, Google Inc. All rights reserved. | 2 * Copyright (C) 2012, 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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25 #include "config.h" | 25 #include "config.h" |
26 #if ENABLE(WEB_AUDIO) | 26 #if ENABLE(WEB_AUDIO) |
27 #include "modules/webaudio/OfflineAudioContext.h" | 27 #include "modules/webaudio/OfflineAudioContext.h" |
28 | 28 |
29 #include "bindings/core/v8/ExceptionMessages.h" | 29 #include "bindings/core/v8/ExceptionMessages.h" |
30 #include "bindings/core/v8/ExceptionState.h" | 30 #include "bindings/core/v8/ExceptionState.h" |
31 #include "bindings/core/v8/ScriptState.h" | 31 #include "bindings/core/v8/ScriptState.h" |
32 #include "core/dom/Document.h" | 32 #include "core/dom/Document.h" |
33 #include "core/dom/ExceptionCode.h" | 33 #include "core/dom/ExceptionCode.h" |
34 #include "core/dom/ExecutionContext.h" | 34 #include "core/dom/ExecutionContext.h" |
| 35 #include "modules/webaudio/DeferredTaskHandler.h" |
| 36 #include "modules/webaudio/OfflineAudioCompletionEvent.h" |
| 37 #include "modules/webaudio/OfflineAudioDestinationNode.h" |
| 38 |
35 #include "platform/audio/AudioUtilities.h" | 39 #include "platform/audio/AudioUtilities.h" |
36 | 40 |
37 namespace blink { | 41 namespace blink { |
38 | 42 |
39 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi
gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState&
exceptionState) | 43 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi
gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState&
exceptionState) |
40 { | 44 { |
41 // FIXME: add support for workers. | 45 // FIXME: add support for workers. |
42 if (!context || !context->isDocument()) { | 46 if (!context || !context->isDocument()) { |
43 exceptionState.throwDOMException( | 47 exceptionState.throwDOMException( |
44 NotSupportedError, | 48 NotSupportedError, |
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69 if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) { | 73 if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) { |
70 exceptionState.throwDOMException( | 74 exceptionState.throwDOMException( |
71 IndexSizeError, | 75 IndexSizeError, |
72 ExceptionMessages::indexOutsideRange( | 76 ExceptionMessages::indexOutsideRange( |
73 "sampleRate", sampleRate, | 77 "sampleRate", sampleRate, |
74 AudioUtilities::minAudioBufferSampleRate(), ExceptionMessages::I
nclusiveBound, | 78 AudioUtilities::minAudioBufferSampleRate(), ExceptionMessages::I
nclusiveBound, |
75 AudioUtilities::maxAudioBufferSampleRate(), ExceptionMessages::I
nclusiveBound)); | 79 AudioUtilities::maxAudioBufferSampleRate(), ExceptionMessages::I
nclusiveBound)); |
76 return nullptr; | 80 return nullptr; |
77 } | 81 } |
78 | 82 |
79 OfflineAudioContext* audioContext = new OfflineAudioContext(document, number
OfChannels, numberOfFrames, sampleRate); | 83 OfflineAudioContext* audioContext = new OfflineAudioContext(document, number
OfChannels, numberOfFrames, sampleRate, exceptionState); |
80 | 84 |
81 if (!audioContext->destination()) { | 85 if (!audioContext->destination()) { |
82 exceptionState.throwDOMException( | 86 exceptionState.throwDOMException( |
83 NotSupportedError, | 87 NotSupportedError, |
84 "OfflineAudioContext(" + String::number(numberOfChannels) | 88 "OfflineAudioContext(" + String::number(numberOfChannels) |
85 + ", " + String::number(numberOfFrames) | 89 + ", " + String::number(numberOfFrames) |
86 + ", " + String::number(sampleRate) | 90 + ", " + String::number(sampleRate) |
87 + ")"); | 91 + ")"); |
88 } | 92 } |
89 | 93 |
90 audioContext->suspendIfNeeded(); | 94 audioContext->suspendIfNeeded(); |
91 return audioContext; | 95 return audioContext; |
92 } | 96 } |
93 | 97 |
94 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh
annels, size_t numberOfFrames, float sampleRate) | 98 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh
annels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) |
95 : AbstractAudioContext(document, numberOfChannels, numberOfFrames, sampleRat
e) | 99 : AbstractAudioContext(document, numberOfChannels, numberOfFrames, sampleRat
e) |
| 100 , m_isRenderingStarted(false) |
| 101 , m_totalRenderFrames(numberOfFrames) |
96 { | 102 { |
| 103 // Create a new destination for offline rendering. |
| 104 m_renderTarget = AudioBuffer::create(numberOfChannels, numberOfFrames, sampl
eRate); |
| 105 |
| 106 // Throw an exception if the render target is not ready. |
| 107 if (!m_renderTarget) { |
| 108 exceptionState.throwRangeError(ExceptionMessages::failedToConstruct( |
| 109 "OfflineAudioContext", |
| 110 "failed to create OfflineAudioContext(" + |
| 111 String::number(numberOfChannels) + ", " + |
| 112 String::number(numberOfFrames) + ", " + |
| 113 String::number(sampleRate) + ")")); |
| 114 } |
| 115 |
| 116 if (m_renderTarget.get()) |
| 117 m_destinationNode = OfflineAudioDestinationNode::create(this, m_renderTa
rget.get()); |
| 118 |
| 119 initialize(); |
97 } | 120 } |
98 | 121 |
99 OfflineAudioContext::~OfflineAudioContext() | 122 OfflineAudioContext::~OfflineAudioContext() |
100 { | 123 { |
101 } | 124 } |
102 | 125 |
| 126 DEFINE_TRACE(OfflineAudioContext) |
| 127 { |
| 128 visitor->trace(m_renderTarget); |
| 129 visitor->trace(m_completeResolver); |
| 130 visitor->trace(m_scheduledSuspends); |
| 131 AbstractAudioContext::trace(visitor); |
| 132 } |
| 133 |
103 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat
e) | 134 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat
e) |
104 { | 135 { |
| 136 ASSERT(isMainThread()); |
| 137 |
105 // Calling close() on an OfflineAudioContext is not supported/allowed, | 138 // Calling close() on an OfflineAudioContext is not supported/allowed, |
106 // but it might well have been stopped by its execution context. | 139 // but it might well have been stopped by its execution context. |
| 140 // |
| 141 // See: crbug.com/435867 |
107 if (isContextClosed()) { | 142 if (isContextClosed()) { |
108 return ScriptPromise::rejectWithDOMException( | 143 return ScriptPromise::rejectWithDOMException( |
109 scriptState, | 144 scriptState, |
110 DOMException::create( | 145 DOMException::create( |
111 InvalidStateError, | 146 InvalidStateError, |
112 "cannot call startRendering on an OfflineAudioContext in a stopp
ed state.")); | 147 "cannot call startRendering on an OfflineAudioContext in a stopp
ed state.")); |
113 } | 148 } |
114 | 149 |
115 if (m_offlineResolver) { | 150 // If the context is not in the suspended state (i.e. running), reject the p
romise. |
116 // Can't call startRendering more than once. Return a rejected promise
now. | 151 if (contextState() != AudioContextState::Suspended) { |
117 return ScriptPromise::rejectWithDOMException( | 152 return ScriptPromise::rejectWithDOMException( |
118 scriptState, | 153 scriptState, |
119 DOMException::create( | 154 DOMException::create( |
| 155 InvalidStateError, |
| 156 "cannot startRendering when an OfflineAudioContext is " + state(
))); |
| 157 } |
| 158 |
| 159 // Can't call startRendering more than once. Return a rejected promise now. |
| 160 if (m_isRenderingStarted) { |
| 161 return ScriptPromise::rejectWithDOMException( |
| 162 scriptState, |
| 163 DOMException::create( |
120 InvalidStateError, | 164 InvalidStateError, |
121 "cannot call startRendering more than once")); | 165 "cannot call startRendering more than once")); |
122 } | 166 } |
123 | 167 |
124 m_offlineResolver = ScriptPromiseResolver::create(scriptState); | 168 ASSERT(!m_isRenderingStarted); |
125 startRendering(); | 169 |
126 return m_offlineResolver->promise(); | 170 m_completeResolver = ScriptPromiseResolver::create(scriptState); |
| 171 |
| 172 // Start rendering and return the promise. |
| 173 m_isRenderingStarted = true; |
| 174 setContextState(Running); |
| 175 destinationHandler().startRendering(); |
| 176 |
| 177 return m_completeResolver->promise(); |
127 } | 178 } |
128 | 179 |
129 ScriptPromise OfflineAudioContext::closeContext(ScriptState* scriptState) | 180 ScriptPromise OfflineAudioContext::closeContext(ScriptState* scriptState) |
130 { | 181 { |
131 return ScriptPromise::rejectWithDOMException( | 182 return ScriptPromise::rejectWithDOMException( |
132 scriptState, | 183 scriptState, |
133 DOMException::create(InvalidAccessError, "cannot close an OfflineAudioCo
ntext.")); | |
134 } | |
135 | |
136 ScriptPromise OfflineAudioContext::suspendContext(ScriptState* scriptState) | |
137 { | |
138 return ScriptPromise::rejectWithDOMException( | |
139 scriptState, | |
140 DOMException::create( | 184 DOMException::create( |
141 InvalidAccessError, | 185 InvalidAccessError, |
142 "cannot suspend an OfflineAudioContext")); | 186 "cannot close an OfflineAudioContext.")); |
| 187 } |
| 188 |
| 189 ScriptPromise OfflineAudioContext::suspendContext(ScriptState* scriptState) |
| 190 { |
| 191 // This CANNOT be called on OfflineAudioContext; this is only to implement |
| 192 // the pure virtual interface from AbstractAudioContext. |
| 193 RELEASE_ASSERT_NOT_REACHED(); |
| 194 |
| 195 return ScriptPromise(); |
| 196 } |
| 197 |
| 198 ScriptPromise OfflineAudioContext::suspendContext(ScriptState* scriptState, doub
le when) |
| 199 { |
| 200 ASSERT(isMainThread()); |
| 201 |
| 202 ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState)
; |
| 203 ScriptPromise promise = resolver->promise(); |
| 204 |
| 205 // The render thread does not exist; reject the promise. |
| 206 if (!destinationHandler().offlineRenderThread()) { |
| 207 resolver->reject(DOMException::create(InvalidStateError, |
| 208 "the rendering is already finished")); |
| 209 return promise; |
| 210 } |
| 211 |
| 212 // The specified suspend time is negative; reject the promise. |
| 213 if (when < 0) { |
| 214 resolver->reject(DOMException::create(InvalidStateError, |
| 215 "negative suspend time (" + String::number(when) + ") is not allowed
")); |
| 216 return promise; |
| 217 } |
| 218 |
| 219 // Quantize (to the lower boundary) the suspend time by the render quantum. |
| 220 size_t frame = when * sampleRate(); |
| 221 frame -= frame % destinationHandler().renderQuantumFrames(); |
| 222 |
| 223 // The suspend time should be earlier than the total render frame. If the |
| 224 // requested suspension time is equal to the total render frame, the promise |
| 225 // will be rejected. |
| 226 if (m_totalRenderFrames <= frame) { |
| 227 resolver->reject(DOMException::create(InvalidStateError, |
| 228 "cannot schedule a suspend at frame " + String::number(frame) + |
| 229 " (" + String::number(when) + " seconds) " + |
| 230 "because it is greater than or equal to the total render duration of
" + |
| 231 String::number(m_totalRenderFrames) + " frames")); |
| 232 return promise; |
| 233 } |
| 234 |
| 235 // The specified suspend time is in the past; reject the promise. |
| 236 if (frame < currentSampleFrame()) { |
| 237 resolver->reject(DOMException::create(InvalidStateError, |
| 238 "cannot schedule a suspend at frame " + |
| 239 String::number(frame) + " (" + String::number(when) + |
| 240 " seconds) because it is earlier than the current frame of " + |
| 241 String::number(currentSampleFrame()) + " (" + |
| 242 String::number(currentTime()) + " seconds)")); |
| 243 return promise; |
| 244 } |
| 245 |
| 246 // If there is a duplicate suspension at the same quantized frame, |
| 247 // reject the promise. |
| 248 if (m_scheduledSuspends.contains(frame)) { |
| 249 resolver->reject(DOMException::create(InvalidStateError, |
| 250 "cannot schedule more than one suspend at frame " + |
| 251 String::number(frame) + " (" + |
| 252 String::number(when) + " seconds)")); |
| 253 return promise; |
| 254 } |
| 255 |
| 256 // Wait until the suspend map is available for the insertion. Here we should |
| 257 // use AutoLocker because it locks the graph from the main thread. |
| 258 AutoLocker locker(this); |
| 259 |
| 260 m_scheduledSuspends.add(frame, resolver); |
| 261 |
| 262 return promise; |
143 } | 263 } |
144 | 264 |
145 ScriptPromise OfflineAudioContext::resumeContext(ScriptState* scriptState) | 265 ScriptPromise OfflineAudioContext::resumeContext(ScriptState* scriptState) |
146 { | 266 { |
147 return ScriptPromise::rejectWithDOMException( | 267 ASSERT(isMainThread()); |
148 scriptState, | 268 |
149 DOMException::create( | 269 ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState)
; |
150 InvalidAccessError, | 270 ScriptPromise promise = resolver->promise(); |
151 "cannot resume an OfflineAudioContext")); | 271 |
| 272 // If the rendering has not started, reject the promise. |
| 273 if (!m_isRenderingStarted) { |
| 274 resolver->reject(DOMException::create(InvalidStateError, |
| 275 "cannot resume an offline context that has not started")); |
| 276 return promise; |
| 277 } |
| 278 |
| 279 // If the context is in a closed state, reject the promise. |
| 280 if (contextState() == AudioContextState::Closed) { |
| 281 resolver->reject(DOMException::create(InvalidStateError, |
| 282 "cannot resume a closed offline context")); |
| 283 return promise; |
| 284 } |
| 285 |
| 286 // If the context is already running, resolve the promise without altering |
| 287 // the current state or starting the rendering loop. |
| 288 if (contextState() == AudioContextState::Running) { |
| 289 resolver->resolve(); |
| 290 return promise; |
| 291 } |
| 292 |
| 293 // If the context is suspended, resume rendering by setting the state to |
| 294 // "Running." and calling startRendering(). Note that resuming is possible |
| 295 // only after the rendering started. |
| 296 setContextState(Running); |
| 297 destinationHandler().startRendering(); |
| 298 |
| 299 // Resolve the promise immediately. |
| 300 resolver->resolve(); |
| 301 |
| 302 return promise; |
| 303 } |
| 304 |
| 305 void OfflineAudioContext::fireCompletionEvent() |
| 306 { |
| 307 ASSERT(isMainThread()); |
| 308 |
| 309 // We set the state to closed here so that the oncomplete event handler sees |
| 310 // that the context has been closed. |
| 311 setContextState(Closed); |
| 312 |
| 313 AudioBuffer* renderedBuffer = renderTarget(); |
| 314 |
| 315 ASSERT(renderedBuffer); |
| 316 if (!renderedBuffer) |
| 317 return; |
| 318 |
| 319 // Avoid firing the event if the document has already gone away. |
| 320 if (executionContext()) { |
| 321 // Call the offline rendering completion event listener and resolve the |
| 322 // promise too. |
| 323 dispatchEvent(OfflineAudioCompletionEvent::create(renderedBuffer)); |
| 324 m_completeResolver->resolve(renderedBuffer); |
| 325 } else { |
| 326 // The resolver should be rejected when the execution context is gone. |
| 327 m_completeResolver->reject(DOMException::create(InvalidStateError, |
| 328 "the execution context does not exist")); |
| 329 } |
| 330 } |
| 331 |
| 332 bool OfflineAudioContext::handlePreOfflineRenderTasks() |
| 333 { |
| 334 ASSERT(isAudioThread()); |
| 335 |
| 336 // OfflineGraphAutoLocker here locks the audio graph for this scope. Note |
| 337 // that this locker does not use tryLock() inside because the timing of |
| 338 // suspension MUST NOT be delayed. |
| 339 OfflineGraphAutoLocker locker(this); |
| 340 |
| 341 deferredTaskHandler().handleDeferredTasks(); |
| 342 handleStoppableSourceNodes(); |
| 343 |
| 344 return shouldSuspend(); |
| 345 } |
| 346 |
| 347 void OfflineAudioContext::handlePostOfflineRenderTasks() |
| 348 { |
| 349 ASSERT(isAudioThread()); |
| 350 |
| 351 // OfflineGraphAutoLocker here locks the audio graph for the same reason |
| 352 // above in |handlePreOfflineRenderTasks|. |
| 353 OfflineGraphAutoLocker locker(this); |
| 354 |
| 355 deferredTaskHandler().breakConnections(); |
| 356 releaseFinishedSourceNodes(); |
| 357 deferredTaskHandler().handleDeferredTasks(); |
| 358 deferredTaskHandler().requestToDeleteHandlersOnMainThread(); |
| 359 } |
| 360 |
| 361 |
| 362 OfflineAudioDestinationHandler& OfflineAudioContext::destinationHandler() |
| 363 { |
| 364 return static_cast<OfflineAudioDestinationHandler&>(destination()->audioDest
inationHandler()); |
| 365 } |
| 366 |
| 367 void OfflineAudioContext::resolveSuspendOnMainThread(size_t frame) |
| 368 { |
| 369 ASSERT(isMainThread()); |
| 370 |
| 371 // Suspend the context first. This will fire onstatechange event. |
| 372 setContextState(Suspended); |
| 373 |
| 374 ASSERT(m_scheduledSuspends.contains(frame)); |
| 375 |
| 376 // Wait until the suspend map is available for the removal. |
| 377 AutoLocker locker(this); |
| 378 |
| 379 SuspendMap::iterator it = m_scheduledSuspends.find(frame); |
| 380 it->value->resolve(); |
| 381 |
| 382 m_scheduledSuspends.remove(it); |
| 383 } |
| 384 |
| 385 bool OfflineAudioContext::shouldSuspend() |
| 386 { |
| 387 ASSERT(isAudioThread()); |
| 388 |
| 389 if (m_scheduledSuspends.contains(currentSampleFrame())) |
| 390 return true; |
| 391 |
| 392 return false; |
152 } | 393 } |
153 | 394 |
154 } // namespace blink | 395 } // namespace blink |
155 | 396 |
156 #endif // ENABLE(WEB_AUDIO) | 397 #endif // ENABLE(WEB_AUDIO) |
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