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Code Issues Activity

fix the bs412 power meter - again

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This commit is contained in:
kuba
2026-05-03 18:55:23 +02:00
parent 4a6025086d
commit 38dcca3730
2 changed files with 5 additions and 8 deletions
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filter/bs412.c
+5 -5
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@@ -8,10 +8,10 @@ inline float dbr_to_deviation(float dbr) {
return 19000.0f * sqrtf(pow(10.0, dbr / 10.0));
}
#define SQRT19000 180499999.99999997f // (19000 / sqrt(2)) * 19000 / sqrt(2)
inline float deviation_to_dbr(float deviation) {
if (deviation < 1e-6f) return -100.0f;
return 10*log10f(deviation/SQRT19000);
#define REF_POWER (19000.0f * 19000.0f) // 361,000,000
inline float power_to_dbr(float power) {
if (power < 1e-12f) return -100.0f;
return 10*log10f(power / REF_POWER);
}
void init_bs412(BS412Compressor* comp, uint32_t mpx_deviation, float target_power, float attack, float release, float max_gain, uint32_t sample_rate) {
@@ -66,7 +66,7 @@ float bs412_compress(BS412Compressor* comp, float audio, float sample_mpx, float
comp->sample_counter++;
if(mpx_power != NULL) *mpx_power = deviation_to_dbr(comp->avg_power);
if(mpx_power != NULL) *mpx_power = power_to_dbr(comp->avg_power);
if(comp->can_compress) return output_sample;
return combined;
filter/bs412.h
-3
View File
@@ -28,8 +28,5 @@ typedef struct
float last_output;
} BS412Compressor;
// float dbr_to_deviation(float dbr);
float deviation_to_dbr(float deviation);
void init_bs412(BS412Compressor *comp, uint32_t mpx_deviation, float target_power, float attack, float release, float max_gain, uint32_t sample_rate);
float bs412_compress(BS412Compressor *comp, float audio, float sample_mpx, float* mpx_power);