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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 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 23 matching lines...) Expand all Loading... |
| 34 #include "wtf/PassRefPtr.h" | 34 #include "wtf/PassRefPtr.h" |
| 35 #include "wtf/RefCounted.h" | 35 #include "wtf/RefCounted.h" |
| 36 #include "wtf/RefPtr.h" | 36 #include "wtf/RefPtr.h" |
| 37 #include "wtf/Vector.h" | 37 #include "wtf/Vector.h" |
| 38 | 38 |
| 39 namespace WebCore { | 39 namespace WebCore { |
| 40 | 40 |
| 41 class AudioBus; | 41 class AudioBus; |
| 42 class ExceptionState; | 42 class ExceptionState; |
| 43 | 43 |
| 44 class AudioBuffer : public ScriptWrappable, public RefCounted<AudioBuffer> { | 44 class AudioBuffer : public RefCountedWillBeGarbageCollectedFinalized<AudioBuffer
>, public ScriptWrappable { |
| 45 public: | 45 public: |
| 46 static PassRefPtr<AudioBuffer> create(unsigned numberOfChannels, size_t numb
erOfFrames, float sampleRate); | 46 static PassRefPtrWillBeRawPtr<AudioBuffer> create(unsigned numberOfChannels,
size_t numberOfFrames, float sampleRate); |
| 47 | 47 |
| 48 // Returns 0 if data is not a valid audio file. | 48 // Returns 0 if data is not a valid audio file. |
| 49 static PassRefPtr<AudioBuffer> createFromAudioFileData(const void* data, siz
e_t dataSize, bool mixToMono, float sampleRate); | 49 static PassRefPtrWillBeRawPtr<AudioBuffer> createFromAudioFileData(const voi
d* data, size_t dataSize, bool mixToMono, float sampleRate); |
| 50 |
| 51 static PassRefPtrWillBeRawPtr<AudioBuffer> createFromAudioBus(AudioBus*); |
| 50 | 52 |
| 51 // Format | 53 // Format |
| 52 size_t length() const { return m_length; } | 54 size_t length() const { return m_length; } |
| 53 double duration() const { return length() / static_cast<double>(sampleRate()
); } | 55 double duration() const { return length() / static_cast<double>(sampleRate()
); } |
| 54 float sampleRate() const { return m_sampleRate; } | 56 float sampleRate() const { return m_sampleRate; } |
| 55 | 57 |
| 56 // Channel data access | 58 // Channel data access |
| 57 unsigned numberOfChannels() const { return m_channels.size(); } | 59 unsigned numberOfChannels() const { return m_channels.size(); } |
| 58 PassRefPtr<Float32Array> getChannelData(unsigned channelIndex, ExceptionStat
e&); | 60 PassRefPtr<Float32Array> getChannelData(unsigned channelIndex, ExceptionStat
e&); |
| 59 Float32Array* getChannelData(unsigned channelIndex); | 61 Float32Array* getChannelData(unsigned channelIndex); |
| 60 void zero(); | 62 void zero(); |
| 61 | 63 |
| 62 // Scalar gain | 64 // Scalar gain |
| 63 double gain() const { return m_gain; } | 65 double gain() const { return m_gain; } |
| 64 void setGain(double gain) { m_gain = gain; } | 66 void setGain(double gain) { m_gain = gain; } |
| 65 | 67 |
| 66 static float minAllowedSampleRate(); | 68 static float minAllowedSampleRate(); |
| 67 static float maxAllowedSampleRate(); | 69 static float maxAllowedSampleRate(); |
| 70 |
| 71 void trace(Visitor*) { } |
| 72 |
| 68 protected: | 73 protected: |
| 69 AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRa
te); | 74 AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRa
te); |
| 70 explicit AudioBuffer(AudioBus*); | 75 explicit AudioBuffer(AudioBus*); |
| 71 bool createdSuccessfully(unsigned desiredNumberOfChannels) const; | 76 bool createdSuccessfully(unsigned desiredNumberOfChannels) const; |
| 72 | 77 |
| 73 double m_gain; // scalar gain | 78 double m_gain; // scalar gain |
| 74 float m_sampleRate; | 79 float m_sampleRate; |
| 75 size_t m_length; | 80 size_t m_length; |
| 76 | 81 |
| 77 Vector<RefPtr<Float32Array> > m_channels; | 82 Vector<RefPtr<Float32Array> > m_channels; |
| 78 }; | 83 }; |
| 79 | 84 |
| 80 } // namespace WebCore | 85 } // namespace WebCore |
| 81 | 86 |
| 82 #endif // AudioBuffer_h | 87 #endif // AudioBuffer_h |
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