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Code Issues Activity

try to add a simple rc lpf

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KubaPro010
2025-03-26 14:04:38 +01:00
parent 4c472c0fc0
commit fc9bbd3262
3 changed files with 22 additions and 1 deletions
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12
lib/filters.c
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@@ -12,4 +12,16 @@ float apply_preemphasis(ResistorCapacitor *filter, float sample) {
float hard_clip(float sample, float threshold) {
return fmaxf(-threshold, fminf(threshold, sample));
}
void init_rc_lpf(ResistorCapacitor *filter, float cutoff, float sample_rate) {
filter->prev_sample = 0.0f;
float dt = 1.0f/sample_rate;
float rc = 1.0f/(cutoff*M_2PI);
filter->alpha = dt/(rc+dt);
}
float apply_rc_lpf(ResistorCapacitor *filter, float sample) {
float out = filter->prev_sample+(filter->alpha*(sample-filter->prev_sample));
filter->prev_sample = sample;
return out;
}