shepard_tone_source.h

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/*
Summary:
ShepardToneSource uses a single keyframe and a special looping technique to produce a continuously rising (or falling) tone—an auditory illusion known as a Shepard tone. By rearranging frequency components into a loop frame and interpolating between these frames, this source can create a stable, looping sonic texture that simulates infinite pitch movement.
 */
 
#pragma once
 
#include "JuceHeader.h"
#include "wave_source.h"
 
class ShepardToneSource : public WaveSource {
public:
    ShepardToneSource();
    virtual ~ShepardToneSource();
 
    virtual void render(vital::WaveFrame* wave_frame, float position) override;
 
    virtual WavetableComponentFactory::ComponentType getType() override;
 
    virtual bool hasKeyframes() override { return false; }
 
protected:
    std::unique_ptr<WaveSourceKeyframe> loop_frame_; 
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(ShepardToneSource)
};