radio95/fm95
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is this vibe coding?

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This commit is contained in:
Kuba
2025-08-08 23:08:05 +02:00
committed by GitHub
parent 883d2f86dc
commit 46a7361349
2 changed files with 12 additions and 18 deletions
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23
filter/iir.c
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@@ -16,21 +16,16 @@ inline float apply_preemphasis(ResistorCapacitor *filter, float sample) {
}
void tilt_init(TiltCorrectionFilter* filter, float correction_strength) {
filter->alpha = 0.9999f;
filter->gain = correction_strength; // Can be > 1.0
filter->x_prev = 0.0f;
filter->y_prev = 0.0f;
f->tilt = correction_strength;
f->prev_in = 0.0f;
f->prev_out = 0.0f;
}
float tilt(TiltCorrectionFilter* filter, float input) {
// High-pass filter
float hp_out = filter->alpha * (filter->y_prev + input - filter->x_prev);
// Apply gain and add back to original
float output = input + filter->gain * hp_out;
filter->x_prev = input;
filter->y_prev = hp_out;
return output;
float out = input + f->tilt * (input - f->prev_in);
f->prev_in = input;
f->prev_out = out;
return out;
}

7
filter/iir.h
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@@ -14,10 +14,9 @@ void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate, f
float apply_preemphasis(ResistorCapacitor *filter, float sample);
typedef struct {
float alpha;
float x_prev;
float y_prev;
float gain;
float tilt; // Tilt amount (-1.0 to +1.0 typical)
float prev_in; // Previous input sample
float prev_out; // Previous output sample
} TiltCorrectionFilter;
void tilt_init(TiltCorrectionFilter* filter, float alpha);