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change gain reduction logic

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KubaPro010
2025-03-29 22:37:37 +01:00
parent 25c0a34359
commit 320cc22fe6
2 changed files with 10 additions and 6 deletions
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2
.vscode/.server-controller-port.log vendored
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@@ -1,5 +1,5 @@
{ {
"port": 13452, "port": 13452,
"time": 1743282530729, "time": 1743284210487,
"version": "0.0.3" "version": "0.0.3"
} }

14
src/fm95.c
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@@ -527,11 +527,15 @@ int main(int argc, char **argv) {
float mpower = measure_mpx(&power, output[i] * 75000); float mpower = measure_mpx(&power, output[i] * 75000);
if (mpower > mpx_power) { if (mpower > mpx_power) {
float excess = mpower - mpx_power; float excess_power = mpower - mpx_power;
float attenuation_db = excess * 0.75f; float reduction_factor_db = excess_power;
float attenuation_linear = dbr_to_deviation(attenuation_db)/75000;
output[i] *= attenuation_linear; float reduction_factor_linear = powf(10.0f, -reduction_factor_db / 20.0f);
printf("Overpower! %f*%f/%f\n", mpower, attenuation_linear, mpx_power);
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; output[i] *= master_volume;