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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, 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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| 78 DEFINE_EVENT_TARGET_REFCOUNTING(ThreadSafeRefCountedWillBeThreadSafeRefCount
edGarbageCollected<AudioContext>); | 78 DEFINE_EVENT_TARGET_REFCOUNTING(ThreadSafeRefCountedWillBeThreadSafeRefCount
edGarbageCollected<AudioContext>); |
| 79 public: | 79 public: |
| 80 // Create an AudioContext for rendering to the audio hardware. | 80 // Create an AudioContext for rendering to the audio hardware. |
| 81 static PassRefPtrWillBeRawPtr<AudioContext> create(Document&, ExceptionState
&); | 81 static PassRefPtrWillBeRawPtr<AudioContext> create(Document&, ExceptionState
&); |
| 82 | 82 |
| 83 virtual ~AudioContext(); | 83 virtual ~AudioContext(); |
| 84 | 84 |
| 85 virtual void trace(Visitor*); | 85 virtual void trace(Visitor*); |
| 86 | 86 |
| 87 bool isInitialized() const; | 87 bool isInitialized() const; |
| 88 // The constructor of an AudioNode must call this to initialize the context. | |
| 89 void lazyInitialize(); | |
| 90 | |
| 91 bool isOfflineContext() { return m_isOfflineContext; } | 88 bool isOfflineContext() { return m_isOfflineContext; } |
| 92 | 89 |
| 93 // Document notification | 90 // Document notification |
| 94 virtual void stop() OVERRIDE FINAL; | 91 virtual void stop() OVERRIDE FINAL; |
| 95 virtual bool hasPendingActivity() const OVERRIDE; | 92 virtual bool hasPendingActivity() const OVERRIDE; |
| 96 | 93 |
| 97 AudioDestinationNode* destination() { return m_destinationNode.get(); } | 94 AudioDestinationNode* destination() { return m_destinationNode.get(); } |
| 98 size_t currentSampleFrame() const { return m_destinationNode->currentSampleF
rame(); } | 95 size_t currentSampleFrame() const { return m_destinationNode->currentSampleF
rame(); } |
| 99 double currentTime() const { return m_destinationNode->currentTime(); } | 96 double currentTime() const { return m_destinationNode->currentTime(); } |
| 100 float sampleRate() const { return m_destinationNode->sampleRate(); } | 97 float sampleRate() const { return m_destinationNode->sampleRate(); } |
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| 235 | 232 |
| 236 protected: | 233 protected: |
| 237 explicit AudioContext(Document*); | 234 explicit AudioContext(Document*); |
| 238 AudioContext(Document*, unsigned numberOfChannels, size_t numberOfFrames, fl
oat sampleRate); | 235 AudioContext(Document*, unsigned numberOfChannels, size_t numberOfFrames, fl
oat sampleRate); |
| 239 | 236 |
| 240 static bool isSampleRateRangeGood(float sampleRate); | 237 static bool isSampleRateRangeGood(float sampleRate); |
| 241 | 238 |
| 242 private: | 239 private: |
| 243 void constructCommon(); | 240 void constructCommon(); |
| 244 | 241 |
| 242 void initialize(); |
| 245 void uninitialize(); | 243 void uninitialize(); |
| 246 | 244 |
| 247 // ExecutionContext calls stop twice. | 245 // ExecutionContext calls stop twice. |
| 248 // We'd like to schedule only one stop action for them. | 246 // We'd like to schedule only one stop action for them. |
| 249 bool m_isStopScheduled; | 247 bool m_isStopScheduled; |
| 250 static void stopDispatch(void* userData); | 248 static void stopDispatch(void* userData); |
| 251 bool m_isCleared; | 249 bool m_isCleared; |
| 252 void clear(); | 250 void clear(); |
| 253 | 251 |
| 254 void scheduleNodeDeletion(); | 252 void scheduleNodeDeletion(); |
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| 321 AsyncAudioDecoder m_audioDecoder; | 319 AsyncAudioDecoder m_audioDecoder; |
| 322 | 320 |
| 323 // This is considering 32 is large enough for multiple channels audio. | 321 // This is considering 32 is large enough for multiple channels audio. |
| 324 // It is somewhat arbitrary and could be increased if necessary. | 322 // It is somewhat arbitrary and could be increased if necessary. |
| 325 enum { MaxNumberOfChannels = 32 }; | 323 enum { MaxNumberOfChannels = 32 }; |
| 326 }; | 324 }; |
| 327 | 325 |
| 328 } // WebCore | 326 } // WebCore |
| 329 | 327 |
| 330 #endif // AudioContext_h | 328 #endif // AudioContext_h |
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