34 lines
832 B
C++
34 lines
832 B
C++
#pragma once
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#include "Effect.h"
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class Filter : public Effect {
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protected:
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struct Normals {
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float V;
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float K;
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};
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float m_freq; // cutoff frequency
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float m_q; // filter quantity (resonance)
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float m_order; // filter order (peakGain)
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/* todo: filter adsr */
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float m_norm;
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float m_a0, m_a1, m_a2, m_b1, m_b2;
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float m_z1, m_z2;
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Normals calculate_normals();
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virtual void calculate_coefficients(){};
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public:
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Filter(/* args */);
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~Filter();
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void Trigger() override;
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void Release() override;
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float Process(float in);
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void Process(std::vector<float>& samples) override;
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void SetParameters(float freq, float res, float q);
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float GetFreq() { return m_freq; }
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float GetRes() { return m_q; }
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float GetPeakGain() { return m_norm; }
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};
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