File phaser.h¶

File List > DaisySP > Source > Effects > phaser.h
Source Code¶

/*
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_PHASER_H
#define DSY_PHASER_H
#ifdef __cplusplus

#include <stdint.h>
#include "Utility/delayline.h"

namespace daisysp
{
class PhaserEngine
{
  public:
    PhaserEngine() {}
    ~PhaserEngine() {}

    void Init(float sample_rate);

    float Process(float in);

    void SetLfoDepth(float depth);

    void SetLfoFreq(float lfo_freq);

    void SetFreq(float ap_freq);

    void SetFeedback(float feedback);

  private:
    float                    sample_rate_;
    static constexpr int32_t kDelayLength
        = 2400; // 50 ms at 48kHz = .05 * 48000

    //triangle lfo
    float lfo_phase_;
    float lfo_freq_;
    float lfo_amp_;

    float os_;

    float feedback_;
    float ap_freq_;

    float deltime_;
    float last_sample_;

    DelayLine<float, kDelayLength> del_;

    float ProcessLfo();
};

//wraps up all of the phaser engines
class Phaser
{
  public:
    Phaser() {}
    ~Phaser() {}

    void Init(float sample_rate);

    float Process(float in);

    void SetPoles(int poles);

    void SetLfoDepth(float depth);

    void SetLfoFreq(float lfo_freq);

    void SetFreq(float ap_freq);

    void SetFeedback(float feedback);

  private:
    static constexpr int kMaxPoles = 8;
    PhaserEngine         engines_[kMaxPoles];
    float                gain_frac_;
    int                  poles_;
};
} //namespace daisysp
#endif
#endif