psyn/voice.c

#include <stdint.h>
#include <stdbool.h>
#include <math.h>
#include "osc.h"
#include "env.h"
#include "filter.h"
#include "voice.h"
#include "psyn.h"
#include "rng.h"

void voice_init(struct voice_t *voice, double freq)
{
//	filter_init_rc(&voice->fil[0], 1000.0, 0.000000047);
//	filter_init_rc(&voice->fil[1], 47000.0, 0.000000047);
	filter_init_freq(&voice->fil[0], 2000.0);
	filter_init_freq(&voice->fil[1], 150.0);

	osc_setfreq(&voice->osc[0], freq);
	osc_setfreq(&voice->osc[1], freq * 1.2);
	osc_setfreq(&voice->osc[2], freq * 5);
}

static inline void voice_tick(struct voice_t *voice)
{
	unsigned i;
	for (i = 0; i < VOICE_OSCILLATORS; i++) {
		osc_tick(voice->osc + i);
	}

	voice->sample++;
}

void voice_run(struct voice_t *voice, uint32_t samples, float *left, float *right)
{
//	uint32_t pos;
	double amplitude;
	double l;
	double r;

	//for (pos = 0; pos < samples; pos++) {
	voice_tick(voice);

	amplitude = env_getamplitude(&_env, voice->sample, voice->released);

	if (amplitude <= 0.0001) {
		voice->playing = false;
		return;
	}

	amplitude *= voice->velocity;

	l = amplitude * voice->osc[0].sin * (1.0 + rng() * 0.25);
	r = amplitude * voice->osc[0].sin * (1.0 + rng() * 0.25);

	amplitude = env_getamplitude(&_env2, voice->sample, voice->released) * voice->velocity * voice->velocity * 1.5;

	if (amplitude > 0.0) {
		l += amplitude * voice->osc[1].tri * (1.0 + voice->osc[2].sin * 0.25);
		r += amplitude * voice->osc[1].tri * (1.0 + voice->osc[2].sin * 0.25);
	}

	*left += l;
	*right += r;

//	filter_run_lp(&voice->fil[0], l, r);
//	filter_run_hp(&voice->fil[1], voice->fil[0].last_out_l, voice->fil[0].last_out_r);

//	*left += voice->fil[0].last_out_l;
//	*right += voice->fil[0].last_out_r;
//	}
}