radio95/fm95
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some optimalizations

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This commit is contained in:
KubaPro010
2025-03-09 17:13:46 +01:00
parent eda100d8a1
commit 1cbc8e7903
4 changed files with 31 additions and 31 deletions
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12
lib/filters.c
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@@ -10,15 +10,9 @@ float apply_preemphasis(ResistorCapacitor *filter, float sample) {
return out;
}
float hard_clip(float sample, float threshold) {
if (sample > threshold) {
return threshold; // Clip to the upper threshold
} else if (sample < -threshold) {
return -threshold; // Clip to the lower threshold
} else {
return sample; // No clipping
}
float hard_clip_fast(float sample, float threshold) {
// Branchless clipping
return fmaxf(-threshold, fminf(threshold, sample));
}
float voltage_db_to_voltage(float db) {

3
lib/fm_modulator.c
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@@ -10,6 +10,7 @@ void init_fm_modulator(FMModulator *fm, float frequency, float deviation, float
float modulate_fm(FMModulator *fm, float sample) {
float inst_freq = fm->frequency+(sample*fm->deviation);
if (inst_freq < 0.0f) inst_freq = 0.0f;
float out = sinf(fm->osc_phase);
fm->osc_phase += fmodf(fm->osc_phase + ((M_2PI * inst_freq) / fm->sample_rate), M_2PI);
return sinf(fm->osc_phase);
return out;
}