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Side by Side Diff: Source/modules/webaudio/OscillatorNode.h

Issue 18182009: WaveTable name has changed to PeriodicWave (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: fix global constructors test Created 7 years, 5 months ago
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1 /* 1 /*
2 * Copyright (C) 2012, Google Inc. All rights reserved. 2 * Copyright (C) 2012, 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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29 #include "modules/webaudio/AudioParam.h" 29 #include "modules/webaudio/AudioParam.h"
30 #include "modules/webaudio/AudioScheduledSourceNode.h" 30 #include "modules/webaudio/AudioScheduledSourceNode.h"
31 #include "wtf/OwnArrayPtr.h" 31 #include "wtf/OwnArrayPtr.h"
32 #include "wtf/PassRefPtr.h" 32 #include "wtf/PassRefPtr.h"
33 #include "wtf/RefPtr.h" 33 #include "wtf/RefPtr.h"
34 #include "wtf/Threading.h" 34 #include "wtf/Threading.h"
35 35
36 namespace WebCore { 36 namespace WebCore {
37 37
38 class AudioContext; 38 class AudioContext;
39 class WaveTable; 39 class PeriodicWave;
40 40
41 // OscillatorNode is an audio generator of periodic waveforms. 41 // OscillatorNode is an audio generator of periodic waveforms.
42 42
43 class OscillatorNode : public AudioScheduledSourceNode { 43 class OscillatorNode : public AudioScheduledSourceNode {
44 public: 44 public:
45 // The waveform type. 45 // The waveform type.
46 // These must be defined as in the .idl file. 46 // These must be defined as in the .idl file.
47 enum { 47 enum {
48 SINE = 0, 48 SINE = 0,
49 SQUARE = 1, 49 SQUARE = 1,
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61 virtual void reset(); 61 virtual void reset();
62 62
63 String type() const; 63 String type() const;
64 64
65 bool setType(unsigned); // Returns true on success. 65 bool setType(unsigned); // Returns true on success.
66 void setType(const String&); 66 void setType(const String&);
67 67
68 AudioParam* frequency() { return m_frequency.get(); } 68 AudioParam* frequency() { return m_frequency.get(); }
69 AudioParam* detune() { return m_detune.get(); } 69 AudioParam* detune() { return m_detune.get(); }
70 70
71 void setWaveTable(WaveTable*); 71 void setPeriodicWave(PeriodicWave*);
72 72
73 private: 73 private:
74 OscillatorNode(AudioContext*, float sampleRate); 74 OscillatorNode(AudioContext*, float sampleRate);
75 75
76 // Returns true if there are sample-accurate timeline parameter changes. 76 // Returns true if there are sample-accurate timeline parameter changes.
77 bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess); 77 bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess);
78 78
79 virtual bool propagatesSilence() const OVERRIDE; 79 virtual bool propagatesSilence() const OVERRIDE;
80 80
81 // One of the waveform types defined in the enum. 81 // One of the waveform types defined in the enum.
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93 // Since it's floating-point, it has sub-sample accuracy. 93 // Since it's floating-point, it has sub-sample accuracy.
94 double m_virtualReadIndex; 94 double m_virtualReadIndex;
95 95
96 // This synchronizes process(). 96 // This synchronizes process().
97 mutable Mutex m_processLock; 97 mutable Mutex m_processLock;
98 98
99 // Stores sample-accurate values calculated according to frequency and detun e. 99 // Stores sample-accurate values calculated according to frequency and detun e.
100 AudioFloatArray m_phaseIncrements; 100 AudioFloatArray m_phaseIncrements;
101 AudioFloatArray m_detuneValues; 101 AudioFloatArray m_detuneValues;
102 102
103 RefPtr<WaveTable> m_waveTable; 103 RefPtr<PeriodicWave> m_periodicWave;
104 104
105 // Cache the wave tables for different waveform types, except CUSTOM. 105 // Cache the wave tables for different waveform types, except CUSTOM.
106 static WaveTable* s_waveTableSine; 106 static PeriodicWave* s_periodicWaveSine;
107 static WaveTable* s_waveTableSquare; 107 static PeriodicWave* s_periodicWaveSquare;
108 static WaveTable* s_waveTableSawtooth; 108 static PeriodicWave* s_periodicWaveSawtooth;
109 static WaveTable* s_waveTableTriangle; 109 static PeriodicWave* s_periodicWaveTriangle;
110 }; 110 };
111 111
112 } // namespace WebCore 112 } // namespace WebCore
113 113
114 #endif // OscillatorNode_h 114 #endif // OscillatorNode_h
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