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80 lines
1.9 KiB
80 lines
1.9 KiB
4 years ago
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#pragma once
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#ifndef DSY_OSCILLATORBANK_H
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#define DSY_OSCILLATORBANK_H
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#include <stdint.h>
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#ifdef __cplusplus
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/** @file oscillatorbank.h */
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namespace daisysp
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{
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/**
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@brief Oscillator Bank module.
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@author Ben Sergentanis
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@date Dec 2020
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A mixture of 7 sawtooth and square waveforms in the style of divide-down organs \n \n
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Ported from pichenettes/eurorack/plaits/dsp/oscillator/string_synth_oscillator.h \n
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\n to an independent module. \n
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Original code written by Emilie Gillet in 2016. \n
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*/
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class OscillatorBank
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{
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public:
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OscillatorBank() {}
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~OscillatorBank() {}
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/** Init string synth module
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\param sample_rate Audio engine sample rate
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*/
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void Init(float sample_rate);
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/** Get next floating point sample
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*/
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float Process();
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/** Set oscillator frequency (8' oscillator)
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\param freq Frequency in Hz
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*/
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void SetFreq(float freq);
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/** Set amplitudes of 7 oscillators. 0-6 are Saw 8', Square 8', Saw 4', Square 4', Saw 2', Square 2', Saw 1'
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\param amplitudes array of 7 floating point amplitudes. Must sum to 1.
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*/
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void SetAmplitudes(const float* amplitudes);
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/** Set a single amplitude
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\param amp Amplitude to set.
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\param idx Which wave's amp to set
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*/
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void SetSingleAmp(float amp, int idx);
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/** Set overall gain.
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\param gain Gain to set. 0-1.
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*/
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void SetGain(float gain);
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private:
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// Oscillator state.
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float phase_;
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float next_sample_;
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int segment_;
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float gain_;
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float registration_[7];
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float unshifted_registration_[7];
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float frequency_;
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float saw_8_gain_;
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float saw_4_gain_;
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float saw_2_gain_;
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float saw_1_gain_;
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float sample_rate_;
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bool recalc_, recalc_gain_;
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bool cmp(float a, float b) { return fabsf(a - b) > .0000001; }
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};
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} // namespace daisysp
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#endif
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#endif
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