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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/ThreadSafeFunctional.h" | |
34 #include "platform/audio/AudioUtilities.h" | 37 #include "platform/audio/AudioUtilities.h" |
38 #include "public/platform/Platform.h" | |
35 | 39 |
36 namespace blink { | 40 namespace blink { |
37 | 41 |
38 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) | 42 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) |
39 { | 43 { |
40 // FIXME: add support for workers. | 44 // FIXME: add support for workers. |
41 if (!context || !context->isDocument()) { | 45 if (!context || !context->isDocument()) { |
42 exceptionState.throwDOMException( | 46 exceptionState.throwDOMException( |
43 NotSupportedError, | 47 NotSupportedError, |
44 "Workers are not supported."); | 48 "Workers are not supported."); |
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85 + ", " + String::number(sampleRate) | 89 + ", " + String::number(sampleRate) |
86 + ")"); | 90 + ")"); |
87 } | 91 } |
88 | 92 |
89 audioContext->suspendIfNeeded(); | 93 audioContext->suspendIfNeeded(); |
90 return audioContext; | 94 return audioContext; |
91 } | 95 } |
92 | 96 |
93 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) | 97 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) |
94 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) | 98 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) |
99 , m_isRenderingStarted(false) | |
100 , m_totalRenderFrames(numberOfFrames) | |
95 { | 101 { |
96 } | 102 } |
97 | 103 |
98 OfflineAudioContext::~OfflineAudioContext() | 104 OfflineAudioContext::~OfflineAudioContext() |
99 { | 105 { |
100 } | 106 } |
101 | 107 |
108 // FIXME: What should be done to trace members in OfflineAudioContext? | |
109 // DEFINE_TRACE(OfflineAudioContext) | |
110 // { | |
111 // visitor->trace(m_scheduledSuspends); | |
112 // visitor->trace(m_completeResolver); | |
113 // } | |
114 | |
115 OfflineAudioContext::ScheduledSuspendContainer::ScheduledSuspendContainer( | |
116 size_t suspendFrame, PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver) | |
117 : m_suspendFrame(suspendFrame) | |
118 , m_resolver(resolver) | |
119 , m_isPending(false) | |
120 { | |
121 } | |
122 | |
123 OfflineAudioContext::ScheduledSuspendContainer::~ScheduledSuspendContainer() | |
124 { | |
125 } | |
126 | |
127 DEFINE_TRACE(OfflineAudioContext::ScheduledSuspendContainer) | |
128 { | |
129 visitor->trace(m_resolver); | |
130 } | |
131 | |
132 PassOwnPtr<OfflineAudioContext::ScheduledSuspendContainer> | |
133 OfflineAudioContext::ScheduledSuspendContainer::create( | |
134 size_t suspendFrame, PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver) | |
135 { | |
136 return adoptPtr(new ScheduledSuspendContainer(suspendFrame, resolver)); | |
137 } | |
138 | |
139 bool OfflineAudioContext::ScheduledSuspendContainer::shouldSuspendAt(size_t when Frame) const | |
140 { | |
141 if (m_suspendFrame != whenFrame) | |
142 return false; | |
143 | |
144 return true; | |
145 } | |
146 | |
147 bool OfflineAudioContext::ScheduledSuspendContainer::isPending() const | |
148 { | |
149 return m_isPending; | |
150 } | |
151 | |
152 void OfflineAudioContext::ScheduledSuspendContainer::markAsPending() | |
153 { | |
154 m_isPending = true; | |
155 } | |
156 | |
157 bool OfflineAudioContext::shouldSuspendNow() | |
158 { | |
159 ASSERT(!isMainThread()); | |
160 | |
161 // Suspend if necessary and mark the associated promise as pending. Note | |
162 // that duplicate entries in the suspend list are prohibited so it returns | |
163 // immediately when a valid suspend is found. This duplicate check is done | |
164 // by |suspendOfflineRendering|. | |
165 size_t nowFrame = currentSampleFrame(); | |
166 for (unsigned index = 0; index < m_scheduledSuspends.size(); ++index) { | |
167 if (m_scheduledSuspends.at(index)->shouldSuspendAt(nowFrame)) { | |
168 m_scheduledSuspends.at(index)->markAsPending(); | |
169 return true; | |
170 } | |
171 } | |
172 | |
173 return false; | |
174 } | |
175 | |
176 void OfflineAudioContext::resolvePendingSuspendPromises() | |
177 { | |
178 ASSERT(!isMainThread()); | |
179 | |
180 // Resolve promises marked as 'pending'. | |
181 if (m_scheduledSuspends.size() > 0) { | |
182 Platform::current()->mainThread()->postTask(FROM_HERE, | |
183 threadSafeBind(&OfflineAudioContext::resolvePendingSuspendPromisesOn MainThread, this)); | |
184 } | |
185 } | |
186 | |
187 void OfflineAudioContext::fireCompletionEvent() | |
188 { | |
189 ASSERT(isMainThread()); | |
190 if (!isMainThread()) | |
191 return; | |
192 | |
193 // We set the state to closed here so that the oncomplete event handler sees | |
194 // that the context has been closed. | |
195 setContextState(Closed); | |
196 | |
197 AudioBuffer* renderedBuffer = renderTarget().get(); | |
198 | |
199 ASSERT(renderedBuffer); | |
200 if (!renderedBuffer) | |
201 return; | |
202 | |
203 // Avoid firing the event if the document has already gone away. | |
204 if (executionContext()) { | |
205 // Call the offline rendering completion event listener and resolve the | |
206 // promise too. | |
207 dispatchEvent(OfflineAudioCompletionEvent::create(renderedBuffer)); | |
208 m_completeResolver->resolve(renderedBuffer); | |
209 } | |
210 } | |
211 | |
102 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) | 212 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) |
103 { | 213 { |
214 ASSERT(isMainThread()); | |
215 | |
216 // FIXME: This check causes crash on oac-detached-no-crash.html | |
217 // ASSERT(m_destinationNode); | |
Raymond Toy
2015/06/15 20:42:14
Does this still crash? If not, remove these lines.
| |
218 | |
104 // Calling close() on an OfflineAudioContext is not supported/allowed, | 219 // Calling close() on an OfflineAudioContext is not supported/allowed, |
105 // but it might well have been stopped by its execution context. | 220 // but it might well have been stopped by its execution context. |
106 if (isContextClosed()) { | 221 if (isContextClosed()) { |
107 return ScriptPromise::rejectWithDOMException( | 222 return ScriptPromise::rejectWithDOMException( |
108 scriptState, | 223 scriptState, |
109 DOMException::create( | 224 DOMException::create( |
110 InvalidStateError, | 225 InvalidStateError, |
111 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); | 226 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); |
112 } | 227 } |
113 | 228 |
114 if (m_offlineResolver) { | 229 if (m_completeResolver) { |
115 // Can't call startRendering more than once. Return a rejected promise now. | 230 // Can't call startRendering more than once. Return a rejected promise now. |
116 return ScriptPromise::rejectWithDOMException( | 231 return ScriptPromise::rejectWithDOMException( |
117 scriptState, | 232 scriptState, |
118 DOMException::create( | 233 DOMException::create( |
119 InvalidStateError, | 234 InvalidStateError, |
120 "cannot call startRendering more than once")); | 235 "cannot call startRendering more than once")); |
121 } | 236 } |
122 | 237 |
123 m_offlineResolver = ScriptPromiseResolver::create(scriptState); | 238 m_completeResolver = ScriptPromiseResolver::create(scriptState); |
124 startRendering(); | 239 |
125 return m_offlineResolver->promise(); | 240 // If the context is not in the suspended state, reject the promise. |
241 if (contextState() != AudioContextState::Suspended) { | |
242 return ScriptPromise::rejectWithDOMException( | |
243 scriptState, | |
244 DOMException::create( | |
245 InvalidStateError, | |
246 "cannot startRendering when an OfflineAudioContext is not in a s uspended state")); | |
247 } | |
248 | |
249 // Start rendering and return the promise. | |
250 m_isRenderingStarted = true; | |
251 setContextState(Running); | |
252 destination()->audioDestinationHandler().startRendering(); | |
253 return m_completeResolver->promise(); | |
254 } | |
255 | |
256 ScriptPromise OfflineAudioContext::suspendOfflineRendering(ScriptState* scriptSt ate, double when) | |
257 { | |
258 ASSERT(isMainThread()); | |
259 | |
260 // The specified suspend time is negative, reject the promise. | |
261 if (when < 0) { | |
262 return ScriptPromise::rejectWithDOMException( | |
263 scriptState, | |
264 DOMException::create( | |
265 InvalidStateError, | |
266 "negative suspend time is not allowed")); | |
267 } | |
268 | |
269 // Quantize the suspend time to the rendering block boundary. | |
270 size_t quantizedFrame = destination()->audioDestinationHandler().quantizeTim eToRenderQuantum(when); | |
271 | |
272 // The specified suspend time is in the past, reject the promise. | |
273 if (quantizedFrame < currentSampleFrame()) { | |
274 return ScriptPromise::rejectWithDOMException( | |
275 scriptState, | |
276 DOMException::create( | |
277 InvalidStateError, | |
278 "cannot schedule a suspend at " + String::number(when) + | |
279 " which is in the past")); | |
Raymond Toy
2015/06/15 20:42:13
Perhaps this is more helpful in debugging if we al
hongchan
2015/06/15 21:44:20
Done.
| |
280 } | |
281 | |
282 // The suspend time should be earlier than the total render frame. If the | |
283 // requested suspension time is equal to the total render frame, the promise | |
284 // will be rejected. | |
285 if (m_totalRenderFrames <= quantizedFrame) { | |
286 return ScriptPromise::rejectWithDOMException( | |
287 scriptState, | |
288 DOMException::create( | |
289 InvalidStateError, | |
290 "cannot schedule a suspend at " + String::number(when) + | |
291 " seconds which is greater than or equal to the total render duratio n of " + | |
292 String::number(m_totalRenderFrames / sampleRate()))); | |
Raymond Toy
2015/06/15 20:42:13
I wonder if this would be clearer if we used frame
hongchan
2015/06/15 21:44:20
Done.
| |
293 } | |
294 | |
295 // If there is a duplicate suspension at the same quantize frame, reject the | |
296 // promise. | |
297 for (unsigned index = 0; index < m_scheduledSuspends.size(); ++index) { | |
298 if (m_scheduledSuspends.at(index)->shouldSuspendAt(quantizedFrame)) { | |
299 return ScriptPromise::rejectWithDOMException( | |
300 scriptState, | |
301 DOMException::create( | |
302 InvalidStateError, | |
303 "cannot schedule more than one suspend at " + String::number(whe n) + | |
304 " seconds whose quantized frame is " + String::number(quantizedF rame))); | |
305 } | |
306 } | |
307 | |
308 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
309 ScriptPromise promise = resolver->promise(); | |
310 m_scheduledSuspends.append(ScheduledSuspendContainer::create(quantizedFrame, resolver)); | |
311 | |
312 return promise; | |
313 } | |
314 | |
315 ScriptPromise OfflineAudioContext::resumeOfflineRendering(ScriptState* scriptSta te) | |
316 { | |
317 ASSERT(isMainThread()); | |
318 | |
319 AutoLocker locker(this); | |
320 | |
321 // If the context is not in a suspended state, reject the promise. | |
322 if (contextState() != AudioContextState::Suspended) { | |
323 return ScriptPromise::rejectWithDOMException( | |
324 scriptState, | |
325 DOMException::create( | |
326 InvalidStateError, | |
327 "cannot resume a context that is not suspended")); | |
328 } | |
329 | |
330 // If the rendering has not started, reject the promise. | |
331 if (!m_isRenderingStarted) { | |
332 return ScriptPromise::rejectWithDOMException( | |
333 scriptState, | |
334 DOMException::create( | |
335 InvalidStateError, | |
336 "cannot resume a context that has not started")); | |
337 } | |
338 | |
339 // If the context is suspended, resume rendering by calling startRendering() | |
340 // and set the state to "Running." Note that resuming is possible only after | |
341 // the rendering started. | |
342 setContextState(Running); | |
343 | |
344 destination()->audioDestinationHandler().startRendering(); | |
345 | |
346 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
347 ScriptPromise promise = resolver->promise(); | |
348 | |
349 // Resolve the promise immediately. | |
350 resolver->resolve(); | |
351 | |
352 return promise; | |
353 } | |
354 | |
355 void OfflineAudioContext::resolvePendingSuspendPromisesOnMainThread() | |
356 { | |
357 ASSERT(isMainThread()); | |
358 AutoLocker locker(this); | |
359 | |
360 // Suspend the context first. This will fire onstatechange event. | |
361 setContextState(Suspended); | |
362 | |
363 // FIXME: is removing elements efficient? What if there are 10K suspends? | |
364 // Resolve any pending suspend and remove it from the list. | |
365 for (unsigned index = 0; index < m_scheduledSuspends.size();) { | |
366 if (m_scheduledSuspends.at(index)->isPending()) { | |
367 m_scheduledSuspends.at(index)->resolver()->resolve(); | |
368 m_scheduledSuspends.remove(index); | |
369 } else { | |
370 ++index; | |
371 } | |
372 } | |
126 } | 373 } |
127 | 374 |
128 } // namespace blink | 375 } // namespace blink |
129 | 376 |
130 #endif // ENABLE(WEB_AUDIO) | 377 #endif // ENABLE(WEB_AUDIO) |
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