analogsnaredrum.h

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/*
Copyright (c) 2020 Electrosmith, Corp, Emilie Gillet
 
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
 
#pragma once
#ifndef DSY_ANALOG_SNARE_H
#define DSY_ANALOG_SNARE_H
 
#include "Filters/svf.h"
 
#include <stdint.h>
#ifdef __cplusplus
 
namespace daisysp
{
class AnalogSnareDrum
{
  public:
    AnalogSnareDrum() {}
    ~AnalogSnareDrum() {}
 
    static const int kNumModes = 5;
 
    void Init(float sample_rate);
 
    float Process(bool trigger = false);
 
    void Trig();
 
    void SetSustain(bool sustain);
 
    void SetAccent(float accent);
 
    void SetFreq(float f0);
 
    void SetTone(float tone);
 
    void SetDecay(float decay);
 
    void SetSnappy(float snappy);
 
  private:
    float sample_rate_;
 
    float f0_, tone_, accent_, snappy_, decay_;
    bool  sustain_;
    bool  trig_;
 
    inline float SoftLimit(float x);
    inline float SoftClip(float x);
 
    int   pulse_remaining_samples_;
    float pulse_;
    float pulse_height_;
    float pulse_lp_;
    float noise_envelope_;
    float sustain_gain_;
 
    Svf resonator_[kNumModes];
    Svf noise_filter_;
 
    // Replace the resonators in "free running" (sustain) mode.
    float phase_[kNumModes];
};
} // namespace daisysp
#endif
#endif