You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
1.7 KiB
73 lines
1.7 KiB
#pragma once
|
|
#ifndef DSY_FORMANTOSCILLATOR_H
|
|
#define DSY_FORMANTOSCILLATOR_H
|
|
|
|
#include <stdint.h>
|
|
#ifdef __cplusplus
|
|
|
|
/** @file formantosc.h */
|
|
|
|
namespace daisysp
|
|
{
|
|
/**
|
|
@brief Formant Oscillator Module.
|
|
@author Ben Sergentanis
|
|
@date Dec 2020
|
|
Sinewave with aliasing-free phase reset. \n \n
|
|
Ported from pichenettes/eurorack/plaits/dsp/oscillator/formant_oscillator.h \n
|
|
to an independent module. \n
|
|
Original code written by Emilie Gillet in 2016. \n
|
|
*/
|
|
class FormantOscillator
|
|
{
|
|
public:
|
|
FormantOscillator() {}
|
|
~FormantOscillator() {}
|
|
|
|
/** Initializes the FormantOscillator module.
|
|
\param sample_rate - The sample rate of the audio engine being run.
|
|
*/
|
|
void Init(float sample_rate);
|
|
|
|
/** Get the next sample
|
|
*/
|
|
float Process();
|
|
|
|
/** Set the formant frequency.
|
|
\param freq Frequency in Hz
|
|
*/
|
|
void SetFormantFreq(float freq);
|
|
|
|
/** Set the carrier frequency. This is the "main" frequency.
|
|
\param freq Frequency in Hz
|
|
*/
|
|
void SetCarrierFreq(float freq);
|
|
|
|
/** Set the amount of phase shift
|
|
\param ps Typically 0-1. Works with other values though, including negative.
|
|
*/
|
|
void SetPhaseShift(float ps);
|
|
|
|
private:
|
|
inline float Sine(float phase);
|
|
inline float ThisBlepSample(float t);
|
|
inline float NextBlepSample(float t);
|
|
|
|
// Oscillator state.
|
|
float carrier_phase_;
|
|
float formant_phase_;
|
|
float next_sample_;
|
|
|
|
// For interpolation of parameters.
|
|
float carrier_frequency_;
|
|
float formant_frequency_;
|
|
float phase_shift_;
|
|
float ps_inc_;
|
|
|
|
float sample_rate_;
|
|
|
|
//DISALLOW_COPY_AND_ASSIGN(FormantOscillator);
|
|
};
|
|
} //namespace daisysp
|
|
#endif
|
|
#endif |