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Side by Side Diff: Source/modules/webaudio/AudioContext.h

Issue 297313003: Initialize AudioContext on constructor to increase currentTime in real-time. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Remove layout test Created 6 years, 6 months ago
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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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