radio95/fm95
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reduce gain

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KubaPro010
2025-03-29 21:10:16 +01:00
parent e04dcf5f32
commit 9b5bd5bd3e
1 changed files with 12 additions and 4 deletions
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16
src/fm95.c
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@@ -524,10 +524,18 @@ int main(int argc, char **argv) {
}
if(mpx_on) output[i] += hard_clip(current_mpx_in, MPX_CLIPPER_THRESHOLD)*MPX_VOLUME;
if(sca_on) output[i] += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME;
float mpower = measure_mpx(&power, output[i]*75000);
if(mpower > mpx_power) {
printf("Overpower! %f/%f\n", mpower, mpx_power);
float mpower = measure_mpx(&power, output[i] * 75000);
if (mpower > mpx_power) {
float excess_power = mpower - mpx_power;
float reduction_factor_db = excess_power;
float reduction_factor_linear = powf(10.0f, -reduction_factor_db / 20.0f);
output[i] *= reduction_factor_linear;
mpower = measure_mpx(&power, output[i] * 75000);
printf("Reduced overpower: %f -> %f (target: %f)\n", mpower + excess_power, mpower, mpx_power);
}
output[i] *= master_volume;