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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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24 | 24 |
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 "core/dom/Document.h" | 31 #include "core/dom/Document.h" |
32 #include "core/dom/ExceptionCode.h" | 32 #include "core/dom/ExceptionCode.h" |
33 #include "core/dom/ExecutionContext.h" | 33 #include "core/dom/ExecutionContext.h" |
34 #include "modules/webaudio/OfflineAudioCompletionEvent.h" | |
35 #include "modules/webaudio/OfflineAudioDestinationNode.h" | |
36 #include "platform/Task.h" | |
37 #include "platform/ThreadSafeFunctional.h" | |
34 #include "platform/audio/AudioUtilities.h" | 38 #include "platform/audio/AudioUtilities.h" |
39 #include "public/platform/Platform.h" | |
40 | |
35 | 41 |
36 namespace blink { | 42 namespace blink { |
37 | 43 |
38 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) | 44 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) |
39 { | 45 { |
40 // FIXME: add support for workers. | 46 // FIXME: add support for workers. |
41 if (!context || !context->isDocument()) { | 47 if (!context || !context->isDocument()) { |
42 exceptionState.throwDOMException( | 48 exceptionState.throwDOMException( |
43 NotSupportedError, | 49 NotSupportedError, |
44 "Workers are not supported."); | 50 "Workers are not supported."); |
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85 + ", " + String::number(sampleRate) | 91 + ", " + String::number(sampleRate) |
86 + ")"); | 92 + ")"); |
87 } | 93 } |
88 | 94 |
89 audioContext->suspendIfNeeded(); | 95 audioContext->suspendIfNeeded(); |
90 return audioContext; | 96 return audioContext; |
91 } | 97 } |
92 | 98 |
93 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) | 99 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) |
94 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) | 100 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) |
101 , m_isRenderingStarted(false) | |
102 , m_totalRenderFrames(numberOfFrames) | |
95 { | 103 { |
96 } | 104 } |
97 | 105 |
98 OfflineAudioContext::~OfflineAudioContext() | 106 OfflineAudioContext::~OfflineAudioContext() |
99 { | 107 { |
100 } | 108 } |
101 | 109 |
110 DEFINE_TRACE(OfflineAudioContext) | |
111 { | |
112 visitor->trace(m_scheduledSuspends); | |
113 visitor->trace(m_completeResolver); | |
114 AudioContext::trace(visitor); | |
115 } | |
116 | |
117 bool OfflineAudioContext::shouldSuspendNow() | |
118 { | |
119 ASSERT(!isMainThread()); | |
120 | |
121 // Suspend if necessary and mark the associated promise as pending. Marked | |
122 // promises will be resolved later. Note that duplicate entries in the | |
123 // suspend list are prohibited so it returns immediately when a valid | |
124 // suspend is found. This duplicate check is done by | |
125 // |suspendOfflineRendering|. | |
126 size_t nowFrame = currentSampleFrame(); | |
127 for (unsigned index = 0; index < m_scheduledSuspends.size(); ++index) { | |
128 if (m_scheduledSuspends.at(index)->shouldSuspendAt(nowFrame)) { | |
129 m_scheduledSuspends.at(index)->markAsPending(); | |
130 return true; | |
131 } | |
132 } | |
133 | |
134 return false; | |
135 } | |
136 | |
137 void OfflineAudioContext::resolvePendingSuspendPromises() | |
138 { | |
139 ASSERT(!isMainThread()); | |
140 | |
141 // Resolve promises marked as 'pending'. | |
142 if (m_scheduledSuspends.size() > 0) { | |
143 Platform::current()->mainThread()->postTask(FROM_HERE, | |
144 threadSafeBind(&OfflineAudioContext::resolvePendingSuspendPromisesOn MainThread, this)); | |
145 } | |
146 } | |
147 | |
148 void OfflineAudioContext::fireCompletionEvent() | |
149 { | |
150 ASSERT(isMainThread()); | |
151 | |
152 // We set the state to closed here so that the oncomplete event handler sees | |
153 // that the context has been closed. | |
154 setContextState(Closed); | |
155 | |
156 AudioBuffer* renderedBuffer = renderTarget(); | |
157 | |
158 ASSERT(renderedBuffer); | |
159 if (!renderedBuffer) | |
160 return; | |
161 | |
162 // Avoid firing the event if the document has already gone away. | |
163 if (executionContext()) { | |
164 // Call the offline rendering completion event listener and resolve the | |
165 // promise too. | |
166 dispatchEvent(OfflineAudioCompletionEvent::create(renderedBuffer)); | |
167 m_completeResolver->resolve(renderedBuffer); | |
168 } | |
169 } | |
170 | |
102 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) | 171 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) |
103 { | 172 { |
173 ASSERT(isMainThread()); | |
174 | |
104 // Calling close() on an OfflineAudioContext is not supported/allowed, | 175 // Calling close() on an OfflineAudioContext is not supported/allowed, |
105 // but it might well have been stopped by its execution context. | 176 // but it might well have been stopped by its execution context. |
106 if (isContextClosed()) { | 177 if (isContextClosed()) { |
107 return ScriptPromise::rejectWithDOMException( | 178 return ScriptPromise::rejectWithDOMException( |
108 scriptState, | 179 scriptState, |
109 DOMException::create( | 180 DOMException::create( |
110 InvalidStateError, | 181 InvalidStateError, |
111 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); | 182 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); |
112 } | 183 } |
113 | 184 |
114 if (m_offlineResolver) { | 185 if (m_completeResolver) { |
115 // Can't call startRendering more than once. Return a rejected promise now. | 186 // Can't call startRendering more than once. Return a rejected promise now. |
116 return ScriptPromise::rejectWithDOMException( | 187 return ScriptPromise::rejectWithDOMException( |
117 scriptState, | 188 scriptState, |
118 DOMException::create( | 189 DOMException::create( |
119 InvalidStateError, | 190 InvalidStateError, |
120 "cannot call startRendering more than once")); | 191 "cannot call startRendering more than once")); |
121 } | 192 } |
122 | 193 |
123 m_offlineResolver = ScriptPromiseResolver::create(scriptState); | 194 // If the context is not in the suspended state, reject the promise. |
124 startRendering(); | 195 if (contextState() != AudioContextState::Suspended) { |
125 return m_offlineResolver->promise(); | 196 return ScriptPromise::rejectWithDOMException( |
197 scriptState, | |
198 DOMException::create( | |
199 InvalidStateError, | |
200 "cannot startRendering when an OfflineAudioContext is not in a s uspended state")); | |
201 } | |
202 | |
203 m_completeResolver = ScriptPromiseResolver::create(scriptState); | |
204 | |
205 // Start rendering and return the promise. | |
206 m_isRenderingStarted = true; | |
207 setContextState(Running); | |
208 destination()->audioDestinationHandler().startRendering(); | |
209 | |
210 return m_completeResolver->promise(); | |
211 } | |
212 | |
213 ScriptPromise OfflineAudioContext::suspendOfflineRendering(ScriptState* scriptSt ate, double when) | |
214 { | |
215 ASSERT(isMainThread()); | |
216 | |
217 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
218 ScriptPromise promise = resolver->promise(); | |
219 | |
220 // validateSuspend(when, resolver); | |
221 | |
222 // Validate the suspend and append if necessary on the render thread. | |
223 // TODO: this does not compile. threadSafeBind throws an error here. | |
224 destination()->audioDestinationHandler().offlineRenderThread()->postTask(FRO M_HERE, | |
225 threadSafeBind(&OfflineAudioContext::validateSuspend, this, when, resolv er)); | |
hongchan
2015/06/19 22:15:40
This doesn't compile with the following error mess
yhirano
2015/06/22 02:26:19
You cannot pass a ScriptPromiseResolver to another
hongchan
2015/06/22 18:23:59
Done.
So, is ScheduledSuspendContainer a ThreadSa
| |
226 | |
227 return promise; | |
hongchan
2015/06/19 22:15:39
@yhirano
We return the promise here, but the rej
yhirano
2015/06/22 02:26:19
No, resolution / rejection must be done on the ori
hongchan
2015/06/22 18:23:59
Okay. I moved the resolution/rejection to the main
| |
228 } | |
229 | |
230 ScriptPromise OfflineAudioContext::resumeOfflineRendering(ScriptState* scriptSta te) | |
231 { | |
232 ASSERT(isMainThread()); | |
233 | |
234 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
235 ScriptPromise promise = resolver->promise(); | |
236 | |
237 // If the context is not in a suspended state, reject the promise. | |
238 if (contextState() != AudioContextState::Suspended) { | |
239 resolver->reject(DOMException::create(InvalidStateError, | |
240 "cannot resume a context that is not suspended")); | |
241 return promise; | |
242 } | |
243 | |
244 // If the rendering has not started, reject the promise. | |
245 if (!m_isRenderingStarted) { | |
246 resolver->reject(DOMException::create(InvalidStateError, | |
247 "cannot resume a context that has not started")); | |
248 return promise; | |
249 } | |
250 | |
251 // If the context is suspended, resume rendering by setting the state to | |
252 // "Running." and calling startRendering(). Note that resuming is possible | |
253 // only after the rendering started. | |
254 setContextState(Running); | |
255 destination()->audioDestinationHandler().startRendering(); | |
256 | |
257 // Resolve the promise immediately. | |
258 resolver->resolve(); | |
259 | |
260 return promise; | |
261 } | |
262 | |
263 void OfflineAudioContext::validateSuspend(double when, PassRefPtrWillBeRawPtr<Sc riptPromiseResolver> resolver) | |
264 { | |
265 ASSERT(!isMainThread()); | |
266 | |
267 // The specified suspend time is negative, reject the promise. | |
268 if (when < 0) { | |
269 resolver->reject(DOMException::create(InvalidStateError, | |
270 "negative suspend time (" + String::number(when) + ") is not allowed ")); | |
271 return; | |
272 } | |
273 | |
274 // Quantize the suspend time to the rendering block boundary. | |
275 size_t quantizedFrame = destination()->audioDestinationHandler().quantizeTim eToRenderQuantum(when); | |
276 | |
277 // The specified suspend time is in the past, reject the promise. | |
278 if (quantizedFrame < currentSampleFrame()) { | |
279 resolver->reject(DOMException::create(InvalidStateError, | |
280 "cannot schedule a suspend at frame " + String::number(quantizedFram e) + | |
281 " (" + String::number(when) + " seconds) because it is earlier than the current frame of " + | |
282 String::number(currentSampleFrame()))); | |
283 return; | |
284 } | |
285 | |
286 // The suspend time should be earlier than the total render frame. If the | |
287 // requested suspension time is equal to the total render frame, the promise | |
288 // will be rejected. | |
289 if (m_totalRenderFrames <= quantizedFrame) { | |
290 resolver->reject(DOMException::create(InvalidStateError, | |
291 "cannot schedule a suspend at frame " + String::number(quantizedFram e) + | |
292 " (" + String::number(when) + " seconds) because it is greater than or equal to the total render duration of " + | |
293 String::number(m_totalRenderFrames) + " frames")); | |
294 return; | |
295 } | |
296 | |
297 // If there is a duplicate suspension at the same quantize frame, reject the | |
298 // promise. | |
299 for (unsigned index = 0; index < m_scheduledSuspends.size(); ++index) { | |
300 if (m_scheduledSuspends.at(index)->shouldSuspendAt(quantizedFrame)) { | |
301 resolver->reject(DOMException::create( | |
302 InvalidStateError, | |
303 "cannot schedule more than one suspend at frame " + String::numb er(quantizedFrame) + | |
304 " (" + String::number(when) + " seconds)")); | |
305 return; | |
306 } | |
307 } | |
308 | |
309 m_scheduledSuspends.append(ScheduledSuspendContainer::create(quantizedFrame, resolver)); | |
310 } | |
311 | |
312 void OfflineAudioContext::resolvePendingSuspendPromisesOnMainThread() | |
hongchan
2015/06/19 22:15:40
@yhirano
This method needs to be rewritten. I wil
| |
313 { | |
314 ASSERT(isMainThread()); | |
315 AutoLocker locker(this); | |
316 | |
317 // Suspend the context first. This will fire onstatechange event. | |
318 setContextState(Suspended); | |
319 | |
320 // TODO: is removing elements efficient? What if there are 10K suspends? | |
321 // Resolve any pending suspend and remove it from the list. | |
322 bool pendingPromiseResolved = false; | |
323 for (unsigned index = 0; index < m_scheduledSuspends.size();) { | |
324 if (m_scheduledSuspends.at(index)->isPending()) { | |
325 | |
326 // We should never have more than one pending suspend at any time. | |
327 ASSERT(!pendingPromiseResolved); | |
328 | |
329 m_scheduledSuspends.at(index)->resolver()->resolve(); | |
330 m_scheduledSuspends.remove(index); | |
331 | |
332 pendingPromiseResolved = true; | |
333 } else { | |
334 ++index; | |
335 } | |
336 } | |
337 } | |
338 | |
339 ScheduledSuspendContainer::ScheduledSuspendContainer( | |
340 size_t suspendFrame, PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver) | |
341 : m_suspendFrame(suspendFrame) | |
342 , m_resolver(resolver) | |
343 , m_isPending(false) | |
344 { | |
345 } | |
346 | |
347 ScheduledSuspendContainer::~ScheduledSuspendContainer() | |
348 { | |
349 } | |
350 | |
351 DEFINE_TRACE(ScheduledSuspendContainer) | |
352 { | |
353 visitor->trace(m_resolver); | |
354 } | |
355 | |
356 ScheduledSuspendContainer* ScheduledSuspendContainer::create( | |
357 size_t suspendFrame, PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver) | |
358 { | |
359 return new ScheduledSuspendContainer(suspendFrame, resolver); | |
360 } | |
361 | |
362 bool ScheduledSuspendContainer::shouldSuspendAt(size_t whenFrame) const | |
363 { | |
364 if (m_suspendFrame != whenFrame) | |
365 return false; | |
366 | |
367 return true; | |
368 } | |
369 | |
370 bool ScheduledSuspendContainer::isPending() const | |
371 { | |
372 return m_isPending; | |
373 } | |
374 | |
375 void ScheduledSuspendContainer::markAsPending() | |
376 { | |
377 m_isPending = true; | |
126 } | 378 } |
127 | 379 |
128 } // namespace blink | 380 } // namespace blink |
129 | 381 |
130 #endif // ENABLE(WEB_AUDIO) | 382 #endif // ENABLE(WEB_AUDIO) |
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