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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 22 matching lines...) Expand all Loading... |
| 33 #include "core/dom/DOMTypedArray.h" | 33 #include "core/dom/DOMTypedArray.h" |
| 34 #include "platform/audio/AudioArray.h" | 34 #include "platform/audio/AudioArray.h" |
| 35 #include "wtf/Forward.h" | 35 #include "wtf/Forward.h" |
| 36 #include "wtf/Vector.h" | 36 #include "wtf/Vector.h" |
| 37 #include <memory> | 37 #include <memory> |
| 38 | 38 |
| 39 namespace blink { | 39 namespace blink { |
| 40 | 40 |
| 41 class BaseAudioContext; | 41 class BaseAudioContext; |
| 42 class ExceptionState; | 42 class ExceptionState; |
| 43 class PeriodicWaveOptions; |
| 43 | 44 |
| 44 class PeriodicWave final : public GarbageCollectedFinalized<PeriodicWave>, publi
c ScriptWrappable { | 45 class PeriodicWave final : public GarbageCollectedFinalized<PeriodicWave>, publi
c ScriptWrappable { |
| 45 DEFINE_WRAPPERTYPEINFO(); | 46 DEFINE_WRAPPERTYPEINFO(); |
| 46 public: | 47 public: |
| 47 static PeriodicWave* createSine(float sampleRate); | 48 static PeriodicWave* createSine(float sampleRate); |
| 48 static PeriodicWave* createSquare(float sampleRate); | 49 static PeriodicWave* createSquare(float sampleRate); |
| 49 static PeriodicWave* createSawtooth(float sampleRate); | 50 static PeriodicWave* createSawtooth(float sampleRate); |
| 50 static PeriodicWave* createTriangle(float sampleRate); | 51 static PeriodicWave* createTriangle(float sampleRate); |
| 51 | 52 |
| 52 // Creates an arbitrary periodic wave given the frequency components (Fourie
r coefficients). | 53 // Creates an arbitrary periodic wave given the frequency components (Fourie
r coefficients). |
| 53 static PeriodicWave* create( | 54 static PeriodicWave* create( |
| 54 BaseAudioContext&, | 55 BaseAudioContext&, |
| 56 size_t realLength, |
| 57 const float* real, |
| 58 size_t imagLength, |
| 59 const float* imag, |
| 60 bool normalize, |
| 61 ExceptionState&); |
| 62 |
| 63 static PeriodicWave* create( |
| 64 BaseAudioContext&, |
| 55 DOMFloat32Array* real, | 65 DOMFloat32Array* real, |
| 56 DOMFloat32Array* imag, | 66 DOMFloat32Array* imag, |
| 57 bool normalize, | 67 bool normalize, |
| 58 ExceptionState&); | 68 ExceptionState&); |
| 59 | 69 |
| 70 static PeriodicWave* create(BaseAudioContext*, const PeriodicWaveOptions&, E
xceptionState&); |
| 71 |
| 60 virtual ~PeriodicWave(); | 72 virtual ~PeriodicWave(); |
| 61 | 73 |
| 62 // Returns pointers to the lower and higher wave data for the pitch range co
ntaining | 74 // Returns pointers to the lower and higher wave data for the pitch range co
ntaining |
| 63 // the given fundamental frequency. These two tables are in adjacent "pitch"
ranges | 75 // the given fundamental frequency. These two tables are in adjacent "pitch"
ranges |
| 64 // where the higher table will have the maximum number of partials which won
't alias when played back | 76 // where the higher table will have the maximum number of partials which won
't alias when played back |
| 65 // at this fundamental frequency. The lower wave is the next range containin
g fewer partials than the higher wave. | 77 // at this fundamental frequency. The lower wave is the next range containin
g fewer partials than the higher wave. |
| 66 // Interpolation between these two tables can be made according to tableInte
rpolationFactor. | 78 // Interpolation between these two tables can be made according to tableInte
rpolationFactor. |
| 67 // Where values from 0 -> 1 interpolate between lower -> higher. | 79 // Where values from 0 -> 1 interpolate between lower -> higher. |
| 68 void waveDataForFundamentalFrequency(float, float*& lowerWaveData, float*& h
igherWaveData, float& tableInterpolationFactor); | 80 void waveDataForFundamentalFrequency(float, float*& lowerWaveData, float*& h
igherWaveData, float& tableInterpolationFactor); |
| 69 | 81 |
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| 104 void adjustV8ExternalMemory(int delta); | 116 void adjustV8ExternalMemory(int delta); |
| 105 | 117 |
| 106 // Creates tables based on numberOfComponents Fourier coefficients. | 118 // Creates tables based on numberOfComponents Fourier coefficients. |
| 107 void createBandLimitedTables(const float* real, const float* imag, unsigned
numberOfComponents, bool disableNormalization); | 119 void createBandLimitedTables(const float* real, const float* imag, unsigned
numberOfComponents, bool disableNormalization); |
| 108 Vector<std::unique_ptr<AudioFloatArray>> m_bandLimitedTables; | 120 Vector<std::unique_ptr<AudioFloatArray>> m_bandLimitedTables; |
| 109 }; | 121 }; |
| 110 | 122 |
| 111 } // namespace blink | 123 } // namespace blink |
| 112 | 124 |
| 113 #endif // PeriodicWave_h | 125 #endif // PeriodicWave_h |
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