radio95/fm95
0
1
Fork 0
mirror of https://github.com/radio95-rnt/fm95.git synced 2026-07-30 16:29:15 +02:00
Code Issues Activity

mpx seperation

Browse Source
This commit is contained in:
kuba
2026-02-15 18:18:54 +01:00
parent 743df55b00
commit 73396a6cba
5 changed files with 20 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
filter/bs412.c
+6 -4
View File
@@ -30,7 +30,9 @@ void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power
#endif
}
float bs412_compress(BS412Compressor* mpx, float sample) {
float bs412_compress(BS412Compressor* mpx, float audio, float sample_mpx) {
float combined = audio + sample_mpx;
mpx->avg_power += mpx->alpha * ((mpx->last_output * mpx->last_output * mpx->mpx_deviation * mpx->mpx_deviation) - mpx->avg_power);
float avg_deviation = sqrtf(mpx->avg_power);
@@ -44,7 +46,7 @@ float bs412_compress(BS412Compressor* mpx, float sample) {
}
#endif
mpx->sample_counter++;
return sample;
return combined;
}
if(mpx->sample_counter > mpx->sample_rate) {
@@ -65,7 +67,7 @@ float bs412_compress(BS412Compressor* mpx, float sample) {
if(mpx->can_compress == 0) {
mpx->sample_counter++;
return sample;
return combined;
}
float target_gain = powf(10.0f, (mpx->target - modulation_power) / 10.0f);
@@ -77,7 +79,7 @@ float bs412_compress(BS412Compressor* mpx, float sample) {
mpx->gain = fmaxf(0.0f, fminf(2.0f, mpx->gain));
float output_sample = sample * mpx->gain;
float output_sample = (audio * mpx->gain) + mpx;
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;