radio95/fm95
0
1
Fork 0
mirror of https://github.com/radio95-rnt/fm95.git synced 2026-02-26 19:23:51 +01:00
Code Issues Activity

some additional optimizations

Browse Source
This commit is contained in:
KubaPro010
2025-06-08 10:25:20 +02:00
parent 178b42386a
commit 7ff2caec3e
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/fm95.c
View File

@@ -380,7 +380,7 @@ int main(int argc, char **argv) {
}
Oscillator osc;
init_oscillator(&osc, polar_stereo ? 31250.0 : 4750, sample_rate);
init_oscillator(&osc, polar_stereo ? 3906.25 : 4750, sample_rate); // 3906.25 * 8 = 31250.0
FMModulator sca_mod;
init_fm_modulator(&sca_mod, sca_frequency, sca_deviation, sample_rate);
@@ -490,7 +490,7 @@ int main(int argc, char **argv) {
audio = mid*MONO_VOLUME;
if(stereo) {
float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, polar_stereo ? 1 : 8); // 31.25 or 38 KHz
float stereo_carrier = get_oscillator_sin_multiplier_ni(&osc, 8); // 31.25 or 38 KHz
if(polar_stereo) audio += ((side+0.2)*stereo_carrier)*STEREO_VOLUME; // 0.2 in polar stereo because it also includes a carrier wave, so we add a carrier wave via DC
else {
@@ -499,10 +499,10 @@ int main(int argc, char **argv) {
audio += (side*stereo_carrier)*STEREO_VOLUME;
}
}
if(rds_on && polar_stereo == 0) {
if(rds_on && !polar_stereo) {
float rds_carrier = get_oscillator_cos_multiplier_ni(&osc, 12); // 57 KHz
mpx += (rds1_in[i]*rds_carrier)*RDS_VOLUME;
float rds2_carrier_66 = get_oscillator_cos_multiplier_ni(&osc, 14); // 66.5 KHz
mpx += (rds1_in[i]*rds_carrier)*RDS_VOLUME;
mpx += (rds2_in[i]*rds2_carrier_66)*RDS2_VOLUME;
if(rds2_on) {
float rds2_carrier_71 = get_oscillator_cos_multiplier_ni(&osc, 15); // 71.25 KHz