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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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| 23 */ | 23 */ |
| 24 | 24 |
| 25 #ifndef AudioContext_h | 25 #ifndef AudioContext_h |
| 26 #define AudioContext_h | 26 #define AudioContext_h |
| 27 | 27 |
| 28 #include "bindings/v8/ScriptWrappable.h" | 28 #include "bindings/v8/ScriptWrappable.h" |
| 29 #include "core/dom/ActiveDOMObject.h" | 29 #include "core/dom/ActiveDOMObject.h" |
| 30 #include "core/events/EventListener.h" | 30 #include "core/events/EventListener.h" |
| 31 #include "core/events/EventTarget.h" | 31 #include "core/events/EventTarget.h" |
| 32 #include "platform/audio/AudioBus.h" | 32 #include "platform/audio/AudioBus.h" |
| 33 #include "platform/audio/HRTFDatabaseLoader.h" | |
| 34 #include "modules/webaudio/AsyncAudioDecoder.h" | 33 #include "modules/webaudio/AsyncAudioDecoder.h" |
| 35 #include "modules/webaudio/AudioDestinationNode.h" | 34 #include "modules/webaudio/AudioDestinationNode.h" |
| 36 #include "wtf/HashSet.h" | 35 #include "wtf/HashSet.h" |
| 37 #include "wtf/MainThread.h" | 36 #include "wtf/MainThread.h" |
| 38 #include "wtf/OwnPtr.h" | 37 #include "wtf/OwnPtr.h" |
| 39 #include "wtf/PassRefPtr.h" | 38 #include "wtf/PassRefPtr.h" |
| 40 #include "wtf/RefCounted.h" | 39 #include "wtf/RefCounted.h" |
| 41 #include "wtf/RefPtr.h" | 40 #include "wtf/RefPtr.h" |
| 42 #include "wtf/ThreadSafeRefCounted.h" | 41 #include "wtf/ThreadSafeRefCounted.h" |
| 43 #include "wtf/Threading.h" | 42 #include "wtf/Threading.h" |
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| 82 | 81 |
| 83 // Deprecated: create an AudioContext for offline (non-realtime) rendering. | 82 // Deprecated: create an AudioContext for offline (non-realtime) rendering. |
| 84 static PassRefPtr<AudioContext> create(Document&, unsigned numberOfChannels,
size_t numberOfFrames, float sampleRate, ExceptionState&); | 83 static PassRefPtr<AudioContext> create(Document&, unsigned numberOfChannels,
size_t numberOfFrames, float sampleRate, ExceptionState&); |
| 85 | 84 |
| 86 virtual ~AudioContext(); | 85 virtual ~AudioContext(); |
| 87 | 86 |
| 88 bool isInitialized() const; | 87 bool isInitialized() const; |
| 89 | 88 |
| 90 bool isOfflineContext() { return m_isOfflineContext; } | 89 bool isOfflineContext() { return m_isOfflineContext; } |
| 91 | 90 |
| 92 // Returns true when initialize() was called AND all asynchronous initializa
tion has completed. | |
| 93 bool isRunnable() const; | |
| 94 | |
| 95 HRTFDatabaseLoader* hrtfDatabaseLoader() const { return m_hrtfDatabaseLoader
.get(); } | |
| 96 | |
| 97 // Document notification | 91 // Document notification |
| 98 virtual void stop() OVERRIDE FINAL; | 92 virtual void stop() OVERRIDE FINAL; |
| 99 | 93 |
| 100 AudioDestinationNode* destination() { return m_destinationNode.get(); } | 94 AudioDestinationNode* destination() { return m_destinationNode.get(); } |
| 101 size_t currentSampleFrame() const { return m_destinationNode->currentSampleF
rame(); } | 95 size_t currentSampleFrame() const { return m_destinationNode->currentSampleF
rame(); } |
| 102 double currentTime() const { return m_destinationNode->currentTime(); } | 96 double currentTime() const { return m_destinationNode->currentTime(); } |
| 103 float sampleRate() const { return m_destinationNode->sampleRate(); } | 97 float sampleRate() const { return m_destinationNode->sampleRate(); } |
| 104 unsigned long activeSourceCount() const { return static_cast<unsigned long>(
m_activeSourceCount); } | 98 unsigned long activeSourceCount() const { return static_cast<unsigned long>(
m_activeSourceCount); } |
| 105 | 99 |
| 106 void incrementActiveSourceCount(); | 100 void incrementActiveSourceCount(); |
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| 314 unsigned m_connectionCount; | 308 unsigned m_connectionCount; |
| 315 | 309 |
| 316 // Graph locking. | 310 // Graph locking. |
| 317 Mutex m_contextGraphMutex; | 311 Mutex m_contextGraphMutex; |
| 318 volatile ThreadIdentifier m_audioThread; | 312 volatile ThreadIdentifier m_audioThread; |
| 319 volatile ThreadIdentifier m_graphOwnerThread; // if the lock is held then th
is is the thread which owns it, otherwise == UndefinedThreadIdentifier | 313 volatile ThreadIdentifier m_graphOwnerThread; // if the lock is held then th
is is the thread which owns it, otherwise == UndefinedThreadIdentifier |
| 320 | 314 |
| 321 // Only accessed in the audio thread. | 315 // Only accessed in the audio thread. |
| 322 Vector<AudioNode*> m_deferredFinishDerefList; | 316 Vector<AudioNode*> m_deferredFinishDerefList; |
| 323 | 317 |
| 324 // HRTF Database loader | |
| 325 RefPtr<HRTFDatabaseLoader> m_hrtfDatabaseLoader; | |
| 326 | |
| 327 RefPtr<AudioBuffer> m_renderTarget; | 318 RefPtr<AudioBuffer> m_renderTarget; |
| 328 | 319 |
| 329 bool m_isOfflineContext; | 320 bool m_isOfflineContext; |
| 330 | 321 |
| 331 AsyncAudioDecoder m_audioDecoder; | 322 AsyncAudioDecoder m_audioDecoder; |
| 332 | 323 |
| 333 // This is considering 32 is large enough for multiple channels audio. | 324 // This is considering 32 is large enough for multiple channels audio. |
| 334 // It is somewhat arbitrary and could be increased if necessary. | 325 // It is somewhat arbitrary and could be increased if necessary. |
| 335 enum { MaxNumberOfChannels = 32 }; | 326 enum { MaxNumberOfChannels = 32 }; |
| 336 | 327 |
| 337 // Number of AudioBufferSourceNodes that are active (playing). | 328 // Number of AudioBufferSourceNodes that are active (playing). |
| 338 int m_activeSourceCount; | 329 int m_activeSourceCount; |
| 339 }; | 330 }; |
| 340 | 331 |
| 341 } // WebCore | 332 } // WebCore |
| 342 | 333 |
| 343 #endif // AudioContext_h | 334 #endif // AudioContext_h |
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