slew_limit_modifier.h

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/*
Summary:
SlewLimitModifier applies slew-rate limiting to the wavetable’s time-domain signal, controlling how quickly the waveform can rise or fall per sample. By adjusting the upward and downward slew parameters, one can achieve smoother transitions and reduce harsh dynamics in the resulting sound. Interpolating between keyframes allows these constraints to evolve across the wavetable.
 */
 
#pragma once
 
#include "JuceHeader.h"
#include "wavetable_component.h"
 
class SlewLimitModifier : public WavetableComponent {
public:
    class SlewLimitModifierKeyframe : public WavetableKeyframe {
    public:
        SlewLimitModifierKeyframe();
        virtual ~SlewLimitModifierKeyframe() { }
 
        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 getSlewUpLimit() { return slew_up_run_rise_; }
 
        float getSlewDownLimit() { return slew_down_run_rise_; }
 
        void setSlewUpLimit(float slew_up_limit) { slew_up_run_rise_ = slew_up_limit; }
 
        void setSlewDownLimit(float slew_down_limit) { slew_down_run_rise_ = slew_down_limit; }
 
    protected:
        float slew_up_run_rise_;   
        float slew_down_run_rise_; 
 
        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(SlewLimitModifierKeyframe)
    };
 
    SlewLimitModifier() { }
    virtual ~SlewLimitModifier() { }
 
    WavetableKeyframe* createKeyframe(int position) override;
    void render(vital::WaveFrame* wave_frame, float position) override;
    WavetableComponentFactory::ComponentType getType() override;
 
    SlewLimitModifierKeyframe* getKeyframe(int index);
 
protected:
    SlewLimitModifierKeyframe compute_frame_; 
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(SlewLimitModifier)
};