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speed up dbr calculation

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kuba
2025-05-31 11:25:28 +02:00
parent 4a0eddbbde
commit d41a5436b7
1 changed files with 2 additions and 2 deletions
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dsp/bs412.c
+2 -2
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@@ -1,12 +1,12 @@
#include "bs412.h" #include "bs412.h"
inline float dbr_to_deviation(float dbr) { inline float dbr_to_deviation(float dbr) {
return 19000.0f * powf(10.0f, dbr / 10.0f); return 19000.0f * powf(2.0f, dbr * 0.332193f);
} }
inline float deviation_to_dbr(float deviation) { inline float deviation_to_dbr(float deviation) {
if(deviation == 0.0f) return -100.0f; if(deviation == 0.0f) return -100.0f;
return 10 * log10f(deviation / 19000.0f); return 10.0f * (log2f(deviation) - log2f(19000.0f)) * 0.30103f;
} }
void init_modulation_power_measure(MPXPowerMeasurement* mpx, int sample_rate) { void init_modulation_power_measure(MPXPowerMeasurement* mpx, int sample_rate) {