VolumeControl.hpp

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/* ✔ */
 
#pragma once
 
#include <AH/Containers/Updatable.hpp>
#include <AH/Hardware/FilteredAnalog.hpp>
#include <AH/Arduino-Wrapper.h>
#include <Audio.h>
#include <Def/Def.hpp>
 
BEGIN_CS_NAMESPACE
 
template <uint8_t N>
class VolumeControl : public AH::Updatable<> {
  public:
    VolumeControl(const Array<AudioMixer4 *, N> &mixers, pin_t analogPin,
                  float maxGain = 1.0)
        : mixers(mixers), filteredAnalog(analogPin), maxGain(maxGain) {}
 
    void update() override {
        if (filteredAnalog.update()) {
            float gain = filteredAnalog.getFloatValue() * maxGain;
            for (AudioMixer4 *mixer : mixers)
                for (uint8_t ch = 0; ch < 4; ch++)
                    mixer->gain(ch, gain);
        }
    }
 
    void begin() override { filteredAnalog.resetToCurrentValue(); }
 
    void map(MappingFunction fn) { filteredAnalog.map(fn); }
 
    void invert() { filteredAnalog.invert(); }
 
  private:
    Array<AudioMixer4 *, N> mixers;
    AH::FilteredAnalog<> filteredAnalog;
    const float maxGain;
};
 
END_CS_NAMESPACE