radio95/fm95
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Code Issues Activity

measure power for mpx with no audio too

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kuba
2025-04-18 22:44:26 +02:00
parent 120296d8e2
commit 9f403b2fac
2 changed files with 5 additions and 2 deletions
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lib/bs412.c
+1 -1
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@@ -18,7 +18,7 @@ float measure_mpx(MPXPowerMeasurement* mpx, float deviation) {
mpx->sample += deviation * deviation; // rmS mpx->sample += deviation * deviation; // rmS
mpx->i++; mpx->i++;
float avg_deviation = sqrtf(mpx->sample / mpx->i); float avg_deviation = sqrtf(mpx->sample / mpx->i); // RMs
float modulation_power = deviation_to_dbr(avg_deviation); float modulation_power = deviation_to_dbr(avg_deviation);
if (mpx->i >= mpx->sample_rate * 60) { if (mpx->i >= mpx->sample_rate * 60) {
src/fm95.c
+4 -1
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@@ -451,6 +451,8 @@ int main(int argc, char **argv) {
MPXPowerMeasurement power; MPXPowerMeasurement power;
init_modulation_power_measure(&power, sample_rate); init_modulation_power_measure(&power, sample_rate);
MPXPowerMeasurement mpx_only_power;
init_modulation_power_measure(&mpx_only_power, sample_rate);
signal(SIGINT, stop); signal(SIGINT, stop);
signal(SIGTERM, stop); signal(SIGTERM, stop);
@@ -540,9 +542,10 @@ int main(int argc, char **argv) {
if(mpx_on) mpx += hard_clip(current_mpx_in, MPX_CLIPPER_THRESHOLD)*MPX_VOLUME; if(mpx_on) mpx += hard_clip(current_mpx_in, MPX_CLIPPER_THRESHOLD)*MPX_VOLUME;
if(sca_on) mpx += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME; if(sca_on) mpx += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME;
float mpx_only = measure_mpx(&mpx_only_power, mpx * mpx_deviation);
float mpower = measure_mpx(&power, (audio+mpx) * mpx_deviation); float mpower = measure_mpx(&power, (audio+mpx) * mpx_deviation);
if (mpower > mpx_power) { if (mpower > mpx_power) {
float excess_power = mpower - mpx_power; float excess_power = mpower - mpx_power - mpx_only_power;
audio *= (dbr_to_deviation(-excess_power)/mpx_deviation); audio *= (dbr_to_deviation(-excess_power)/mpx_deviation);
} }