72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
#pragma once
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#include "IEffect.h"
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#include "Settings.h"
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enum FilterType { LowPass, BandPass, HighPass };
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class Filter : public IEffect {
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protected:
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// float* m_output; // output buffer
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float m_fs = SAMPLE_RATE; // sampling frequency;
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float m_fc; // cutoff frequency normally something like: 440.0*pow(2.0,
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// (midi_note - 69.0)/12.0);
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float m_res; // resonance 0 to 1;
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float m_drive; // internal distortion 0 to 0.1
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float m_freq;
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float m_damp;
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float m_notcho; // notch output
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float m_lowo; // low pass output
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float m_higho; // high pass output
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float m_bando; // band pass output
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float m_peako; // peaking output = low - high
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virtual float GetSampleForFilterType(){ return 0.0; };
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public:
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Filter(/* args */);
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virtual ~Filter();
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void Trigger() override final;
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void Release() override final;
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float Process(float in);
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void Process(std::vector<float>& samples) override final;
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void SetParameters(float freq, float res, float drive);
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float GetFreq() { return m_fc; }
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float GetRes() { return m_res; }
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float GetPeakGain() { return m_drive; }
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virtual bool IsSameFilterType(FilterType type) { return false; };
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};
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class BandPassFilter : public Filter {
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protected:
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float GetSampleForFilterType() override;
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public:
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BandPassFilter();
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BandPassFilter(Filter* filter);
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BandPassFilter(float freq, float res, float q);
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~BandPassFilter();
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bool IsSameFilterType(FilterType type) override { return type == BandPass; };
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};
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class HighPassFilter : public Filter {
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protected:
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float GetSampleForFilterType() override;
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public:
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HighPassFilter();
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HighPassFilter(Filter* filter);
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HighPassFilter(float freq, float res, float q);
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~HighPassFilter();
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bool IsSameFilterType(FilterType type) override { return type == HighPass; };
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};
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class LowPassFilter : public Filter {
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protected:
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float GetSampleForFilterType() override;
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public:
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LowPassFilter();
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LowPassFilter(Filter* filter);
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LowPassFilter(float freq, float res, float q);
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~LowPassFilter();
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bool IsSameFilterType(FilterType type) override { return type == LowPass; };
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}; |