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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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70 class PeriodicWave; | 70 class PeriodicWave; |
71 class ScriptProcessorNode; | 71 class ScriptProcessorNode; |
72 class WaveShaperNode; | 72 class WaveShaperNode; |
73 | 73 |
74 // AudioContext is the cornerstone of the web audio API and all AudioNodes are c
reated from it. | 74 // AudioContext is the cornerstone of the web audio API and all AudioNodes are c
reated from it. |
75 // For thread safety between the audio thread and the main thread, it has a rend
ering graph locking mechanism. | 75 // For thread safety between the audio thread and the main thread, it has a rend
ering graph locking mechanism. |
76 | 76 |
77 class AudioContext : public ActiveDOMObject, public ScriptWrappable, public Thre
adSafeRefCounted<AudioContext>, public EventTargetWithInlineData { | 77 class AudioContext : public ActiveDOMObject, public ScriptWrappable, public Thre
adSafeRefCounted<AudioContext>, public EventTargetWithInlineData { |
78 public: | 78 public: |
79 // Create an AudioContext for rendering to the audio hardware. | 79 // Create an AudioContext for rendering to the audio hardware. |
80 static PassRefPtr<AudioContext> create(Document*); | 80 static PassRefPtr<AudioContext> create(Document&, ExceptionState&); |
81 | 81 |
82 // Create an AudioContext for offline (non-realtime) rendering. | 82 // Deprecated: create an AudioContext for offline (non-realtime) rendering. |
83 static PassRefPtr<AudioContext> createOfflineContext(Document*, unsigned num
berOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState&); | 83 static PassRefPtr<AudioContext> create(Document&, unsigned numberOfChannels,
size_t numberOfFrames, float sampleRate, ExceptionState&); |
84 | 84 |
85 virtual ~AudioContext(); | 85 virtual ~AudioContext(); |
86 | 86 |
87 bool isInitialized() const; | 87 bool isInitialized() const; |
88 | 88 |
89 bool isOfflineContext() { return m_isOfflineContext; } | 89 bool isOfflineContext() { return m_isOfflineContext; } |
90 | 90 |
91 // Returns true when initialize() was called AND all asynchronous initializa
tion has completed. | 91 // Returns true when initialize() was called AND all asynchronous initializa
tion has completed. |
92 bool isRunnable() const; | 92 bool isRunnable() const; |
93 | 93 |
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344 // It is somewhat arbitrary and could be increased if necessary. | 344 // It is somewhat arbitrary and could be increased if necessary. |
345 enum { MaxNumberOfChannels = 32 }; | 345 enum { MaxNumberOfChannels = 32 }; |
346 | 346 |
347 // Number of AudioBufferSourceNodes that are active (playing). | 347 // Number of AudioBufferSourceNodes that are active (playing). |
348 int m_activeSourceCount; | 348 int m_activeSourceCount; |
349 }; | 349 }; |
350 | 350 |
351 } // WebCore | 351 } // WebCore |
352 | 352 |
353 #endif // AudioContext_h | 353 #endif // AudioContext_h |
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