justasample/Source/Sampler/Effects/RingMod.h

/*
  ==============================================================================

    RingMod.h
    Created: 24 Jul 2026
    Author:  Armin

  ==============================================================================
*/

#pragma once
#include <JuceHeader.h>

#include "Effect.h"

/** Ring modulation effect driven by the LFO waveform. */
class RingModEffect final : public Effect
{
public:
    void initialize(int /*numChannels*/, int /*fxSampleRate*/) override
    {
    }

    void setMix(float m)
    {
        mix = juce::jlimit(0.f, 1.f, m);
    }

    void updateParams(const SamplerParameters& samplerSound, bool /*modulating*/) override
    {
        setMix(samplerSound.modRingModMix->get());
    }

    /** Process with a pre-computed LFO buffer for ring modulation. */
    void processWithLFO(juce::AudioBuffer<float>& buffer, int numSamples, const float* lfoBuffer)
    {
        for (int ch = 0; ch < buffer.getNumChannels(); ch++)
        {
            auto* data = buffer.getWritePointer(ch);
            for (int i = 0; i < numSamples; i++)
            {
                float dry = data[i];
                float modulated = dry * lfoBuffer[i];
                data[i] = dry + (modulated - dry) * mix;
            }
        }
    }

    void process(juce::AudioBuffer<float>& /*buffer*/, int /*numSamples*/, int /*startSample*/ = 0) override
    {
        // No-op without LFO buffer
    }

private:
    float mix{ 0.5f };
};