chorus.h

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/*
Copyright (c) 2020 Electrosmith, Corp
 
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_CHORUS_H
#define DSY_CHORUS_H
#ifdef __cplusplus
 
#include <stdint.h>
#include "Utility/delayline.h"
 
namespace daisysp
{
class ChorusEngine
{
  public:
    ChorusEngine() {}
    ~ChorusEngine() {}
 
    void Init(float sample_rate);
 
    float Process(float in);
 
    void SetLfoDepth(float depth);
 
    void SetLfoFreq(float freq);
 
    void SetDelay(float delay);
 
    void SetDelayMs(float ms);
 
    void SetFeedback(float feedback);
 
  private:
    float                    sample_rate_;
    static constexpr int32_t kDelayLength
        = 2400; // 50 ms at 48kHz = .05 * 48000
 
    //triangle lfos
    float lfo_phase_;
    float lfo_freq_;
    float lfo_amp_;
 
    float feedback_;
 
    float delay_;
 
    DelayLine<float, kDelayLength> del_;
 
    float ProcessLfo();
};
 
//wraps up all of the chorus engines
class Chorus
{
  public:
    Chorus() {}
    ~Chorus() {}
 
    void Init(float sample_rate);
 
    float Process(float in);
 
    float GetLeft();
 
    float GetRight();
 
    void SetPan(float panl, float panr);
 
    void SetPan(float pan);
 
    void SetLfoDepth(float depthl, float depthr);
 
    void SetLfoDepth(float depth);
 
    void SetLfoFreq(float freql, float freqr);
 
    void SetLfoFreq(float freq);
 
    void SetDelay(float delayl, float delayr);
 
    void SetDelay(float delay);
 
    void SetDelayMs(float msl, float msr);
 
    void SetDelayMs(float ms);
 
    void SetFeedback(float feedbackl, float feedbackr);
 
    void SetFeedback(float feedback);
 
  private:
    ChorusEngine engines_[2];
    float        gain_frac_;
    float        pan_[2];
 
    float sigl_, sigr_;
};
} //namespace daisysp
#endif
#endif