radio95/fm95
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Code Issues Activity

add bpf to rds2 carrier and lpf

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KubaPro010
2025-03-25 17:01:25 +01:00
parent 73f97bb6d3
commit 7164421e16
4 changed files with 59 additions and 44 deletions
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10
src/fm95.c
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@@ -415,8 +415,10 @@ int main(int argc, char **argv) {
init_preemphasis(&preemp_l, preemphasis_tau, sample_rate);
init_preemphasis(&preemp_r, preemphasis_tau, sample_rate);
PLL rds2_pll;
init_pll(&rds2_pll, 66500, 5, 0.5f, sample_rate);
FIRFilter rds2_bpf, lpf_l, lpf_r;
init_bpf(&rds2_bpf, 66000, 67000);
init_lpf(&lpf_l, 15000);
init_lpf(&lpf_r, 15000);
// #endregion
signal(SIGINT, stop);
@@ -474,6 +476,8 @@ int main(int argc, char **argv) {
float ready_l = apply_preemphasis(&preemp_l, l_in)*2;
float ready_r = apply_preemphasis(&preemp_r, r_in)*2;
ready_l = fir_filter(&lpf_l, ready_l);
ready_r = fir_filter(&lpf_l, ready_r);
ready_l = hard_clip(ready_l*audio_volume, clipper_threshold);
ready_r = hard_clip(ready_r*audio_volume, clipper_threshold);
@@ -495,7 +499,7 @@ int main(int argc, char **argv) {
float rds_carrier = get_oscillator_sin_multiplier_ni(&osc, 3);
output[i] += (current_rds_in*rds_carrier)*RDS_VOLUME;
if(!sca_on) {
float rds2_carrier_66 = apply_pll(&rds2_pll, rds_carrier);
float rds2_carrier_66 = fir_filter(&rds2_bpf, get_oscillator_sin_multiplier_ni(&osc, 3.5f));
output[i] += (current_rds2_in*rds2_carrier_66)*RDS2_VOLUME;
}
}