radio95/fm95
0
1
Fork 0
mirror of https://github.com/radio95-rnt/fm95.git synced 2026-02-26 19:23:51 +01:00
Code Issues Activity

speed up bs412

Browse Source
This commit is contained in:
KubaPro010
2026-02-19 19:17:19 +01:00
parent ca4098f8b1
commit 0d000e7ca8
1 changed files with 5 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
filter/bs412.c
View File

@@ -37,7 +37,7 @@ float bs412_compress(BS412Compressor* comp, float audio, float sample_mpx) {
comp->avg_power += comp->alpha * ((comp->last_output * comp->last_output * comp->mpx_deviation * comp->mpx_deviation) - comp->avg_power); comp->avg_power += comp->alpha * ((comp->last_output * comp->last_output * comp->mpx_deviation * comp->mpx_deviation) - comp->avg_power);
if(comp->sample_counter % 4 == 0) { if(comp->sample_counter % 8 == 0) {
comp->avg_deviation = sqrtf(comp->avg_power); comp->avg_deviation = sqrtf(comp->avg_power);
comp->modulation_power = deviation_to_dbr(comp->avg_deviation); comp->modulation_power = deviation_to_dbr(comp->avg_deviation);
} }
@@ -55,9 +55,8 @@ float bs412_compress(BS412Compressor* comp, float audio, float sample_mpx) {
debug_printf("Can compress.\n"); debug_printf("Can compress.\n");
#endif #endif
comp->can_compress = 1; comp->can_compress = 1;
} comp->second_counter = 0;
} else {
if(comp->can_compress == 0) {
comp->sample_counter++; comp->sample_counter++;
return combined; return combined;
} }
@@ -72,10 +71,8 @@ float bs412_compress(BS412Compressor* comp, float audio, float sample_mpx) {
float dev_after_gain = deviation_to_dbr(comp->avg_deviation * comp->gain); float dev_after_gain = deviation_to_dbr(comp->avg_deviation * comp->gain);
if(dev_after_gain > comp->target && comp->modulation_power < comp->target) { if(dev_after_gain > comp->target && comp->modulation_power < comp->target) {
// Gain is too much, reduce // Gain is too much, reduce
float overshoot_dbr = dev_after_gain - comp->target; float reduction_factor = expf((comp->target - dev_after_gain) * 0.2302585093f);
float reduction_factor = expf((-overshoot_dbr) * 0.2302585093f); comp->gain = CLAMP(comp->gain * reduction_factor, 0.01f, comp->max_gain);
comp->gain *= reduction_factor;
comp->gain = fmaxf(0.01f, fminf(comp->max_gain, comp->gain));
} }
comp->sample_counter++; comp->sample_counter++;