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remove bs412 max

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This commit is contained in:
KubaPro010
2025-12-31 12:12:37 +01:00
parent f10f67c606
commit 0968373064
3 changed files with 6 additions and 12 deletions
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9
filter/bs412.c
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@@ -9,7 +9,7 @@ inline float deviation_to_dbr(float deviation) {
return 10*log10f((deviation*deviation)/((19000.0f / sqrtf(2.0f)) * (19000.0f / sqrtf(2.0f))));
}
void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power, float attack, float release, float max, uint32_t sample_rate) {
void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power, float attack, float release, uint32_t sample_rate) {
mpx->mpx_deviation = mpx_deviation;
mpx->avg_power = 0.0f;
mpx->alpha = 1.0f / (60.0f * sample_rate);
@@ -18,7 +18,6 @@ void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power
mpx->release = expf(-1.0f / (release * sample_rate));
mpx->target = deviation_to_dbr(19000.0f * pow(10.0, target_power / 10.0)); // target is expected to not be our rms format
mpx->gain = 0.0f;
mpx->max = max;
mpx->can_compress = 0;
mpx->second_counter = 0;
#ifdef BS412_DEBUG
@@ -71,15 +70,15 @@ float bs412_compress(BS412Compressor* mpx, float sample) {
mpx->gain = mpx->release * mpx->gain + (1.0f - mpx->release) * target_gain;
}
mpx->gain = fmaxf(0.0f, fminf(mpx->max, mpx->gain));
mpx->gain = fmaxf(0.0f, fminf(sqrtf(2), mpx->gain));
float output_sample = sample * mpx->gain * sqrtf(2);
float output_sample = sample * mpx->gain;
if(deviation_to_dbr(avg_deviation * mpx->gain) > mpx->target && deviation_to_dbr(avg_deviation) < mpx->target) {
// Gain is too much, reduce
float overshoot_dbr = deviation_to_dbr(avg_deviation * mpx->gain) - mpx->target;
float reduction_factor = powf(10.0f, -overshoot_dbr / 10.0f);
mpx->gain *= reduction_factor;
mpx->gain = fmaxf(0.0f, fminf(mpx->max, mpx->gain));
mpx->gain = fmaxf(0.0f, fminf(sqrtf(2), mpx->gain));
}
mpx->sample_counter++;

3
filter/bs412.h
View File

@@ -19,7 +19,6 @@ typedef struct
float target;
float attack;
float release;
float max;
float gain;
double avg_power;
double alpha;
@@ -30,5 +29,5 @@ typedef struct
float dbr_to_deviation(float dbr);
float deviation_to_dbr(float deviation);
void init_bs412(BS412Compressor *mpx, uint32_t mpx_deviation, float target_power, float attack, float release, float max, uint32_t sample_rate);
void init_bs412(BS412Compressor *mpx, uint32_t mpx_deviation, float target_power, float attack, float release, uint32_t sample_rate);
float bs412_compress(BS412Compressor *mpx, float average);