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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 |
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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 static float minAllowedSampleRate(); | 64 static float minAllowedSampleRate(); |
63 static float maxAllowedSampleRate(); | 65 static float maxAllowedSampleRate(); |
| 66 |
| 67 void trace(Visitor*) { } |
| 68 |
64 protected: | 69 protected: |
65 AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRa
te); | 70 AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRa
te); |
66 explicit AudioBuffer(AudioBus*); | 71 explicit AudioBuffer(AudioBus*); |
67 bool createdSuccessfully(unsigned desiredNumberOfChannels) const; | 72 bool createdSuccessfully(unsigned desiredNumberOfChannels) const; |
68 | 73 |
69 float m_sampleRate; | 74 float m_sampleRate; |
70 size_t m_length; | 75 size_t m_length; |
71 | 76 |
72 Vector<RefPtr<Float32Array> > m_channels; | 77 Vector<RefPtr<Float32Array> > m_channels; |
73 }; | 78 }; |
74 | 79 |
75 } // namespace WebCore | 80 } // namespace WebCore |
76 | 81 |
77 #endif // AudioBuffer_h | 82 #endif // AudioBuffer_h |
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