wave_fold_modifier.h

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/*
Summary:
WaveFoldModifier applies a nonlinear wave-folding effect to a wavetable’s time-domain waveform. By scaling and folding the waveform through sine and arcsine functions, it adds harmonic complexity and can create interesting timbral variations. Adjusting the fold boost parameter in keyframes and interpolating between them allows dynamic control over the amount of wave folding across the wavetable.
 */
 
#pragma once
 
#include "JuceHeader.h"
#include "wavetable_component.h"
 
class WaveFoldModifier : public WavetableComponent {
public:
    class WaveFoldModifierKeyframe : public WavetableKeyframe {
    public:
        WaveFoldModifierKeyframe();
        virtual ~WaveFoldModifierKeyframe() { }
 
        void copy(const WavetableKeyframe* keyframe) override;
        void interpolate(const WavetableKeyframe* from_keyframe,
                         const WavetableKeyframe* to_keyframe, float t) override;
        void render(vital::WaveFrame* wave_frame) override;
        json stateToJson() override;
        void jsonToState(json data) override;
 
        float getWaveFoldBoost() { return wave_fold_boost_; }
 
        void setWaveFoldBoost(float boost) { wave_fold_boost_ = boost; }
 
    protected:
        float wave_fold_boost_; 
 
        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(WaveFoldModifierKeyframe)
    };
 
    WaveFoldModifier() { }
    virtual ~WaveFoldModifier() { }
 
    WavetableKeyframe* createKeyframe(int position) override;
    void render(vital::WaveFrame* wave_frame, float position) override;
    WavetableComponentFactory::ComponentType getType() override;
 
    WaveFoldModifierKeyframe* getKeyframe(int index);
 
protected:
    WaveFoldModifierKeyframe compute_frame_; 
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(WaveFoldModifier)
};