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Damian 2026-02-01 13:55:45 +01:00
commit 614fa6cdc8
12 changed files with 345 additions and 8 deletions
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osc.c Normal file
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#include <stdatomic.h>
#include "osc.h"
#include "dsp.h"
#include <stdio.h>
float osc_process(osc *o)
{
o->phase += o->inc;
if (o->phase >= 1.0) {
o->phase -= 1.0;
}
float target = atomic_load(&o->inc_target);
o->inc += 0.001f * (target - o->inc);
float index = o->phase * 2048;
int i0 = (int)(index);
int i1 = (i0 + 1) & (2048 - 1);
float s0 = o->wavetable[i0];
float s1 = o->wavetable[i1];
float frac = index - i0;
return s0 + (s1-s0) * frac;
}
void osc_create(osc *o, float freq, float sample_rate, float *wavetable)
{
o->phase = 0.0;
float inc = freq / sample_rate;
o->inc = inc;
o->wavetable = wavetable;
atomic_store(&o->inc_target, inc);
}