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Side by Side Diff: third_party/WebKit/Source/modules/webaudio/PeriodicWave.h

Issue 2389253002: reflow comments in modules/{webaudio,vr} (Closed)
Patch Set: . Created 4 years, 2 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 * 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 34 matching lines...) Expand 10 before | Expand all | Expand 10 after
45 class PeriodicWave final : public GarbageCollectedFinalized<PeriodicWave>, 45 class PeriodicWave final : public GarbageCollectedFinalized<PeriodicWave>,
46 public ScriptWrappable { 46 public ScriptWrappable {
47 DEFINE_WRAPPERTYPEINFO(); 47 DEFINE_WRAPPERTYPEINFO();
48 48
49 public: 49 public:
50 static PeriodicWave* createSine(float sampleRate); 50 static PeriodicWave* createSine(float sampleRate);
51 static PeriodicWave* createSquare(float sampleRate); 51 static PeriodicWave* createSquare(float sampleRate);
52 static PeriodicWave* createSawtooth(float sampleRate); 52 static PeriodicWave* createSawtooth(float sampleRate);
53 static PeriodicWave* createTriangle(float sampleRate); 53 static PeriodicWave* createTriangle(float sampleRate);
54 54
55 // Creates an arbitrary periodic wave given the frequency components (Fourier coefficients). 55 // Creates an arbitrary periodic wave given the frequency components (Fourier
56 // coefficients).
56 static PeriodicWave* create(BaseAudioContext&, 57 static PeriodicWave* create(BaseAudioContext&,
57 size_t realLength, 58 size_t realLength,
58 const float* real, 59 const float* real,
59 size_t imagLength, 60 size_t imagLength,
60 const float* imag, 61 const float* imag,
61 bool normalize, 62 bool normalize,
62 ExceptionState&); 63 ExceptionState&);
63 64
64 static PeriodicWave* create(BaseAudioContext&, 65 static PeriodicWave* create(BaseAudioContext&,
65 DOMFloat32Array* real, 66 DOMFloat32Array* real,
66 DOMFloat32Array* imag, 67 DOMFloat32Array* imag,
67 bool normalize, 68 bool normalize,
68 ExceptionState&); 69 ExceptionState&);
69 70
70 static PeriodicWave* create(BaseAudioContext*, 71 static PeriodicWave* create(BaseAudioContext*,
71 const PeriodicWaveOptions&, 72 const PeriodicWaveOptions&,
72 ExceptionState&); 73 ExceptionState&);
73 74
74 virtual ~PeriodicWave(); 75 virtual ~PeriodicWave();
75 76
76 // Returns pointers to the lower and higher wave data for the pitch range cont aining 77 // Returns pointers to the lower and higher wave data for the pitch range
77 // the given fundamental frequency. These two tables are in adjacent "pitch" r anges 78 // containing the given fundamental frequency. These two tables are in
78 // where the higher table will have the maximum number of partials which won't alias when played back 79 // adjacent "pitch" ranges where the higher table will have the maximum number
79 // at this fundamental frequency. The lower wave is the next range containing fewer partials than the higher wave. 80 // of partials which won't alias when played back at this fundamental
80 // Interpolation between these two tables can be made according to tableInterp olationFactor. 81 // frequency. The lower wave is the next range containing fewer partials than
82 // the higher wave. Interpolation between these two tables can be made
83 // according to tableInterpolationFactor.
81 // Where values from 0 -> 1 interpolate between lower -> higher. 84 // Where values from 0 -> 1 interpolate between lower -> higher.
82 void waveDataForFundamentalFrequency(float, 85 void waveDataForFundamentalFrequency(float,
83 float*& lowerWaveData, 86 float*& lowerWaveData,
84 float*& higherWaveData, 87 float*& higherWaveData,
85 float& tableInterpolationFactor); 88 float& tableInterpolationFactor);
86 89
87 // Returns the scalar multiplier to the oscillator frequency to calculate wave buffer phase increment. 90 // Returns the scalar multiplier to the oscillator frequency to calculate wave
91 // buffer phase increment.
88 float rateScale() const { return m_rateScale; } 92 float rateScale() const { return m_rateScale; }
89 93
90 // The size of the FFT to use based on the sampling rate. 94 // The size of the FFT to use based on the sampling rate.
91 unsigned periodicWaveSize() const; 95 unsigned periodicWaveSize() const;
92 96
93 // The number of ranges needed for the given sampling rate and FFT size. 97 // The number of ranges needed for the given sampling rate and FFT size.
94 unsigned numberOfRanges() const { return m_numberOfRanges; } 98 unsigned numberOfRanges() const { return m_numberOfRanges; }
95 99
96 DEFINE_INLINE_TRACE() {} 100 DEFINE_INLINE_TRACE() {}
97 101
98 private: 102 private:
99 explicit PeriodicWave(float sampleRate); 103 explicit PeriodicWave(float sampleRate);
100 104
101 void generateBasicWaveform(int); 105 void generateBasicWaveform(int);
102 106
103 size_t m_v8ExternalMemory; 107 size_t m_v8ExternalMemory;
104 108
105 float m_sampleRate; 109 float m_sampleRate;
106 unsigned m_numberOfRanges; 110 unsigned m_numberOfRanges;
107 float m_centsPerRange; 111 float m_centsPerRange;
108 112
109 // The lowest frequency (in Hertz) where playback will include all of the part ials. 113 // The lowest frequency (in Hertz) where playback will include all of the
110 // Playing back lower than this frequency will gradually lose more high-freque ncy information. 114 // partials. Playing back lower than this frequency will gradually lose more
111 // This frequency is quite low (~10Hz @ 44.1KHz) 115 // high-frequency information. This frequency is quite low (~10Hz @ 44.1KHz)
112 float m_lowestFundamentalFrequency; 116 float m_lowestFundamentalFrequency;
113 117
114 float m_rateScale; 118 float m_rateScale;
115 119
116 // Maximum possible number of partials (before culling). 120 // Maximum possible number of partials (before culling).
117 unsigned maxNumberOfPartials() const; 121 unsigned maxNumberOfPartials() const;
118 122
119 unsigned numberOfPartialsForRange(unsigned rangeIndex) const; 123 unsigned numberOfPartialsForRange(unsigned rangeIndex) const;
120 124
121 void adjustV8ExternalMemory(int delta); 125 void adjustV8ExternalMemory(int delta);
122 126
123 // Creates tables based on numberOfComponents Fourier coefficients. 127 // Creates tables based on numberOfComponents Fourier coefficients.
124 void createBandLimitedTables(const float* real, 128 void createBandLimitedTables(const float* real,
125 const float* imag, 129 const float* imag,
126 unsigned numberOfComponents, 130 unsigned numberOfComponents,
127 bool disableNormalization); 131 bool disableNormalization);
128 Vector<std::unique_ptr<AudioFloatArray>> m_bandLimitedTables; 132 Vector<std::unique_ptr<AudioFloatArray>> m_bandLimitedTables;
129 }; 133 };
130 134
131 } // namespace blink 135 } // namespace blink
132 136
133 #endif // PeriodicWave_h 137 #endif // PeriodicWave_h
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