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remove lpf

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This commit is contained in:
kuba
2025-01-25 23:37:20 +01:00
parent b6c7607807
commit c63e94744e
5 changed files with 5 additions and 64 deletions
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src/sca_mod.c
-19
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@@ -35,10 +35,6 @@
#define PREEMPHASIS_TAU 0.00005 // 50 microseconds, use 0.000075 if in america
#endif
#ifdef LPF
#define LPF_CUTOFF 7500
#endif
volatile sig_atomic_t to_run = 1;
float hard_clip(float sample) {
@@ -149,10 +145,6 @@ int main() {
ResistorCapacitor preemp;
init_rc_tau(&preemp, PREEMPHASIS_TAU, SAMPLE_RATE);
#endif
#ifdef LPF
ResistorCapacitor lpf;
init_low_pass_filter(&lpf, LPF_CUTOFF, SAMPLE_RATE);
#endif
signal(SIGINT, stop);
signal(SIGTERM, stop);
@@ -171,21 +163,10 @@ int main() {
float in = input[i];
#ifdef PREEMPHASIS
#ifdef LPF
float lowpassed = apply_low_pass_filter(&lpf, in);
float preemphasized = apply_pre_emphasis(&preemp, lowpassed)*2;
float current_input = hard_clip(preemphasized);
#else
float preemphasized = apply_pre_emphasis(&preemp, in)*2;
float current_input = hard_clip(preemphasized);
#endif
#else
#ifdef LPF
float lowpassed = apply_low_pass_filter(&lpf, in);
float current_input = hard_clip(lowpassed);
#else
float current_input = hard_clip(in);
#endif
#endif
signal[i] = modulate_fm(&mod, current_input)*VOLUME;