2 * Copyright (C) 2010 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
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17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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32 #include "bindings/core/v8/ScriptWrappable.h"
33 #include "wtf/Float32Array.h"
34 #include "wtf/PassRefPtr.h"
35 #include "wtf/RefPtr.h"
36 #include "wtf/Vector.h"
43 class AudioBuffer : public GarbageCollectedFinalized<AudioBuffer>, public ScriptWrappable {
44 DEFINE_WRAPPERTYPEINFO();
46 static AudioBuffer* create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
47 static AudioBuffer* create(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState&);
49 // Returns 0 if data is not a valid audio file.
50 static AudioBuffer* createFromAudioFileData(const void* data, size_t dataSize, bool mixToMono, float sampleRate);
52 static AudioBuffer* createFromAudioBus(AudioBus*);
55 size_t length() const { return m_length; }
56 double duration() const { return length() / static_cast<double>(sampleRate()); }
57 float sampleRate() const { return m_sampleRate; }
59 // Channel data access
60 unsigned numberOfChannels() const { return m_channels.size(); }
61 PassRefPtr<Float32Array> getChannelData(unsigned channelIndex, ExceptionState&);
62 Float32Array* getChannelData(unsigned channelIndex);
65 void trace(Visitor*) { }
67 virtual v8::Handle<v8::Object> associateWithWrapper(const WrapperTypeInfo*, v8::Handle<v8::Object> wrapper, v8::Isolate*) OVERRIDE;
70 AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
71 explicit AudioBuffer(AudioBus*);
72 bool createdSuccessfully(unsigned desiredNumberOfChannels) const;
77 Vector<RefPtr<Float32Array> > m_channels;
82 #endif // AudioBuffer_h