WaveTable name has changed to PeriodicWave

Source/modules/webaudio/WaveTable.h

-/*
- * Copyright (C) 2012 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef WaveTable_h
-#define WaveTable_h
-
-#include "bindings/v8/ScriptWrappable.h"
-#include "core/platform/audio/AudioArray.h"
-#include "wtf/Float32Array.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
-
-namespace WebCore {
-
-class WaveTable : public ScriptWrappable, public RefCounted<WaveTable> {
-public:
-    static PassRefPtr<WaveTable> createSine(float sampleRate);
-    static PassRefPtr<WaveTable> createSquare(float sampleRate);
-    static PassRefPtr<WaveTable> createSawtooth(float sampleRate);
-    static PassRefPtr<WaveTable> createTriangle(float sampleRate);
-
-    // Creates an arbitrary wavetable given the frequency components (Fourier coefficients).
-    static PassRefPtr<WaveTable> create(float sampleRate, Float32Array* real, Float32Array* imag);
-
-    // Returns pointers to the lower and higher wavetable data for the pitch range containing
-    // the given fundamental frequency. These two tables are in adjacent "pitch" ranges
-    // where the higher table will have the maximum number of partials which won't alias when played back
-    // at this fundamental frequency. The lower wavetable is the next range containing fewer partials than the higher wavetable.
-    // Interpolation between these two tables can be made according to tableInterpolationFactor.
-    // Where values from 0 -> 1 interpolate between lower -> higher.
-    void waveDataForFundamentalFrequency(float, float* &lowerWaveData, float* &higherWaveData, float& tableInterpolationFactor);
-
-    // Returns the scalar multiplier to the oscillator frequency to calculate wave table phase increment.
-    float rateScale() const { return m_rateScale; }
-
-    unsigned waveTableSize() const { return m_waveTableSize; }
-    float sampleRate() const { return m_sampleRate; }
-
-private:
-    explicit WaveTable(float sampleRate);
-
-    void generateBasicWaveform(int);
-
-    float m_sampleRate;
-    unsigned m_waveTableSize;
-    unsigned m_numberOfRanges;
-    float m_centsPerRange;
-
-    // The lowest frequency (in Hertz) where playback will include all of the partials.
-    // Playing back lower than this frequency will gradually lose more high-frequency information.
-    // This frequency is quite low (~10Hz @ 44.1KHz)
-    float m_lowestFundamentalFrequency;
-
-    float m_rateScale;
-
-    unsigned numberOfRanges() const { return m_numberOfRanges; }
-
-    // Maximum possible number of partials (before culling).
-    unsigned maxNumberOfPartials() const;
-
-    unsigned numberOfPartialsForRange(unsigned rangeIndex) const;
-
-    // Creates tables based on numberOfComponents Fourier coefficients.
-    void createBandLimitedTables(const float* real, const float* imag, unsigned numberOfComponents);
-    Vector<OwnPtr<AudioFloatArray> > m_bandLimitedTables;
-};
-
-} // namespace WebCore
-
-#endif // WaveTable_h