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

precompute part of dev to dbr

Browse Source
This commit is contained in:
KubaPro010
2026-02-15 16:01:55 +01:00
parent 4451b40cdd
commit 5ab604ddba
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
filter/bs412.c
View File

@@ -2,13 +2,15 @@
#define BS412_TIME 60
#define SQRT19000 180499999.99999997f // (19000 / sqrt(2)) * 19000 / sqrt(2)
// inline float dbr_to_deviation(float dbr) {
// return 19000.0f * sqrtf(pow(10.0, dbr / 10.0));
// }
inline float deviation_to_dbr(float deviation) {
if (deviation < 1e-6f) return -100.0f;
return 10*log10f((deviation*deviation)/((19000.0f / sqrtf(2.0f)) * (19000.0f / sqrtf(2.0f))));
return 10*log10f((deviation*deviation)/(SQRT19000 * SQRT19000));
}
void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power, float attack, float release, uint32_t sample_rate) {