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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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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, |
50 SAWTOOTH = 2, | 50 SAWTOOTH = 2, |
51 TRIANGLE = 3, | 51 TRIANGLE = 3, |
52 CUSTOM = 4 | 52 CUSTOM = 4 |
53 }; | 53 }; |
54 | 54 |
55 static PassRefPtr<OscillatorNode> create(AudioContext*, float sampleRate); | 55 static PassRefPtrWillBeRawPtr<OscillatorNode> create(AudioContext*, float sa
mpleRate); |
56 | 56 |
57 virtual ~OscillatorNode(); | 57 virtual ~OscillatorNode(); |
58 | 58 |
59 // AudioNode | 59 // AudioNode |
60 virtual void process(size_t framesToProcess) OVERRIDE; | 60 virtual void process(size_t framesToProcess) OVERRIDE; |
61 | 61 |
62 String type() const; | 62 String type() const; |
63 | 63 |
64 void setType(const String&); | 64 void setType(const String&); |
65 | 65 |
66 AudioParam* frequency() { return m_frequency.get(); } | 66 AudioParam* frequency() { return m_frequency.get(); } |
67 AudioParam* detune() { return m_detune.get(); } | 67 AudioParam* detune() { return m_detune.get(); } |
68 | 68 |
69 void setPeriodicWave(PeriodicWave*); | 69 void setPeriodicWave(PeriodicWave*); |
70 | 70 |
| 71 virtual void trace(Visitor*) OVERRIDE; |
| 72 |
71 private: | 73 private: |
72 OscillatorNode(AudioContext*, float sampleRate); | 74 OscillatorNode(AudioContext*, float sampleRate); |
73 | 75 |
74 bool setType(unsigned); // Returns true on success. | 76 bool setType(unsigned); // Returns true on success. |
75 | 77 |
76 // Returns true if there are sample-accurate timeline parameter changes. | 78 // Returns true if there are sample-accurate timeline parameter changes. |
77 bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess); | 79 bool calculateSampleAccuratePhaseIncrements(size_t framesToProcess); |
78 | 80 |
79 virtual bool propagatesSilence() const OVERRIDE; | 81 virtual bool propagatesSilence() const OVERRIDE; |
80 | 82 |
81 // One of the waveform types defined in the enum. | 83 // One of the waveform types defined in the enum. |
82 unsigned short m_type; | 84 unsigned short m_type; |
83 | 85 |
84 // Frequency value in Hertz. | 86 // Frequency value in Hertz. |
85 RefPtr<AudioParam> m_frequency; | 87 RefPtrWillBeMember<AudioParam> m_frequency; |
86 | 88 |
87 // Detune value (deviating from the frequency) in Cents. | 89 // Detune value (deviating from the frequency) in Cents. |
88 RefPtr<AudioParam> m_detune; | 90 RefPtrWillBeMember<AudioParam> m_detune; |
89 | 91 |
90 bool m_firstRender; | 92 bool m_firstRender; |
91 | 93 |
92 // m_virtualReadIndex is a sample-frame index into our buffer representing t
he current playback position. | 94 // m_virtualReadIndex is a sample-frame index into our buffer representing t
he current playback position. |
93 // Since it's floating-point, it has sub-sample accuracy. | 95 // Since it's floating-point, it has sub-sample accuracy. |
94 double m_virtualReadIndex; | 96 double m_virtualReadIndex; |
95 | 97 |
96 // This synchronizes process(). | 98 // This synchronizes process(). |
97 mutable Mutex m_processLock; | 99 mutable Mutex m_processLock; |
98 | 100 |
99 // Stores sample-accurate values calculated according to frequency and detun
e. | 101 // Stores sample-accurate values calculated according to frequency and detun
e. |
100 AudioFloatArray m_phaseIncrements; | 102 AudioFloatArray m_phaseIncrements; |
101 AudioFloatArray m_detuneValues; | 103 AudioFloatArray m_detuneValues; |
102 | 104 |
103 RefPtr<PeriodicWave> m_periodicWave; | 105 RefPtrWillBeMember<PeriodicWave> m_periodicWave; |
104 }; | 106 }; |
105 | 107 |
106 } // namespace WebCore | 108 } // namespace WebCore |
107 | 109 |
108 #endif // OscillatorNode_h | 110 #endif // OscillatorNode_h |
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