marvin_LPF.h

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// ========================================================================================================
//  _______ _______ ______ ___ ___ _______ _______
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// |       |       |      <   |   |_|   |_|       |
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//
// This file is part of the Marvin open source library and is licensed under the terms of the MIT License.
//
// ========================================================================================================
 
#ifndef MARVIN_LPF_H
#define MARVIN_LPF_H
#include "marvin/library/marvin_Concepts.h"
namespace marvin::dsp::filters {
    template <FloatType SampleType>
    class LPF {
    public:
        void initialise(double sampleRate) noexcept;
        void setCutoff(SampleType cutoff) noexcept;
        void setCoeff(SampleType newCoeff) noexcept;
        [[nodiscard]] SampleType operator()(SampleType x) noexcept;
        void reset() noexcept;
 
    private:
        double m_sampleRate{ 0.0 };
        SampleType m_prev{ static_cast<SampleType>(0.0) };
        SampleType m_coeff{ static_cast<SampleType>(0.0) };
    };
} // namespace marvin::dsp::filters
#endif