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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/OfflineAudioDestinationNode.h" | |
35 #include "platform/ThreadSafeFunctional.h" | |
34 #include "platform/audio/AudioUtilities.h" | 36 #include "platform/audio/AudioUtilities.h" |
37 #include "public/platform/Platform.h" | |
35 | 38 |
36 namespace blink { | 39 namespace blink { |
37 | 40 |
38 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) | 41 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi gned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState) |
39 { | 42 { |
40 // FIXME: add support for workers. | 43 // FIXME: add support for workers. |
41 if (!context || !context->isDocument()) { | 44 if (!context || !context->isDocument()) { |
42 exceptionState.throwDOMException( | 45 exceptionState.throwDOMException( |
43 NotSupportedError, | 46 NotSupportedError, |
44 "Workers are not supported."); | 47 "Workers are not supported."); |
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85 + ", " + String::number(sampleRate) | 88 + ", " + String::number(sampleRate) |
86 + ")"); | 89 + ")"); |
87 } | 90 } |
88 | 91 |
89 audioContext->suspendIfNeeded(); | 92 audioContext->suspendIfNeeded(); |
90 return audioContext; | 93 return audioContext; |
91 } | 94 } |
92 | 95 |
93 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) | 96 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfCh annels, size_t numberOfFrames, float sampleRate) |
94 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) | 97 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate) |
98 , m_isSuspendScheduled(false) | |
99 , m_suspendTime(-0.0) | |
Raymond Toy
2015/05/13 17:16:08
Why -0.0? This probably won't do what you think i
hongchan
2015/05/13 17:30:53
What would be the proper 'null' value for this cas
| |
95 { | 100 { |
96 } | 101 } |
97 | 102 |
98 OfflineAudioContext::~OfflineAudioContext() | 103 OfflineAudioContext::~OfflineAudioContext() |
99 { | 104 { |
100 } | 105 } |
101 | 106 |
107 bool OfflineAudioContext::suspendIfNecessary() | |
108 { | |
109 ASSERT(!isMainThread()); | |
110 | |
111 if (m_isSuspendScheduled && m_suspendTime <= currentTime()) { | |
112 m_isSuspendScheduled = false; | |
113 m_suspendTime = -0.0; | |
114 return true; | |
115 } | |
116 | |
117 return false; | |
118 } | |
119 | |
102 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) | 120 ScriptPromise OfflineAudioContext::startOfflineRendering(ScriptState* scriptStat e) |
103 { | 121 { |
122 ASSERT(isMainThread()); | |
123 AutoLocker locker(this); | |
124 | |
104 // Calling close() on an OfflineAudioContext is not supported/allowed, | 125 // Calling close() on an OfflineAudioContext is not supported/allowed, |
105 // but it might well have been stopped by its execution context. | 126 // but it might well have been stopped by its execution context. |
106 if (isContextClosed()) { | 127 if (isContextClosed()) { |
107 return ScriptPromise::rejectWithDOMException( | 128 return ScriptPromise::rejectWithDOMException( |
108 scriptState, | 129 scriptState, |
109 DOMException::create( | 130 DOMException::create( |
110 InvalidStateError, | 131 InvalidStateError, |
111 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); | 132 "cannot call startRendering on an OfflineAudioContext in a stopp ed state.")); |
112 } | 133 } |
113 | 134 |
114 if (m_offlineResolver) { | 135 if (m_offlineResolver) { |
115 // Can't call startRendering more than once. Return a rejected promise now. | 136 // Can't call startRendering more than once. Return a rejected promise now. |
116 return ScriptPromise::rejectWithDOMException( | 137 return ScriptPromise::rejectWithDOMException( |
117 scriptState, | 138 scriptState, |
118 DOMException::create( | 139 DOMException::create( |
119 InvalidStateError, | 140 InvalidStateError, |
120 "cannot call startRendering more than once")); | 141 "cannot call startRendering more than once")); |
121 } | 142 } |
122 | 143 |
123 m_offlineResolver = ScriptPromiseResolver::create(scriptState); | 144 m_offlineResolver = ScriptPromiseResolver::create(scriptState); |
124 startRendering(); | 145 |
146 // This calls AudioContext.startRendering(). It seems to be odd to go up the | |
147 // chain and call the parent's method, but the current OAC is basically a | |
148 // thin wrapper on AudioContext. (a container-like object.) | |
149 // | |
150 // If we decide to fix this structural issue completely, we have to touch | |
151 // AudioContext and AudioNode. | |
152 // startRendering(); | |
153 | |
154 destination()->audioDestinationHandler().startRendering(); | |
155 setContextState(Running); | |
156 | |
125 return m_offlineResolver->promise(); | 157 return m_offlineResolver->promise(); |
126 } | 158 } |
127 | 159 |
160 ScriptPromise OfflineAudioContext::suspendOfflineRendering(ScriptState* scriptSt ate, double suspendTime) | |
161 { | |
162 ASSERT(isMainThread()); | |
163 AutoLocker locker(this); | |
164 | |
165 // suspendTime should be greater than currentTime. Otherwise stop the | |
166 // rendering as soon as possible. | |
167 // | |
168 // TODO: add extra time when suspendTime is earlier than currentTime | |
169 if (currentTime() < suspendTime) { | |
170 m_isSuspendScheduled = true; | |
171 m_suspendTime = suspendTime; | |
172 } | |
173 | |
174 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
175 ScriptPromise promise = resolver->promise(); | |
176 m_offlineSuspendResolvers.append(resolver); | |
177 | |
178 // fprintf(stderr, "suspend scheduled = %f\n", m_suspendTime); | |
179 | |
180 return promise; | |
181 } | |
182 | |
183 ScriptPromise OfflineAudioContext::resumeOfflineRendering(ScriptState* scriptSta te) | |
184 { | |
185 ASSERT(isMainThread()); | |
186 AutoLocker locker(this); | |
187 | |
188 RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver:: create(scriptState); | |
189 ScriptPromise promise = resolver->promise(); | |
190 m_offlineResumeResolvers.append(resolver); | |
191 | |
192 // Calling startRendering() in OfflineAudioDestinationHandler. | |
193 destination()->audioDestinationHandler().startRendering(); | |
194 setContextState(Running); | |
195 | |
196 return promise; | |
197 } | |
198 | |
128 } // namespace blink | 199 } // namespace blink |
129 | 200 |
130 #endif // ENABLE(WEB_AUDIO) | 201 #endif // ENABLE(WEB_AUDIO) |
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