From 702117e4d7fc669ec4c4a273a6bdc9d8c6f7a231 Mon Sep 17 00:00:00 2001
From: KubaPro010 <kuba.pro010@gmail.com>
Date: Tue, 25 Mar 2025 17:27:59 +0100
Subject: [PATCH] damn it

---
 .vscode/.server-controller-port.log |  2 +-
 lib/filters.c                       | 29 -----------------------------
 lib/filters.h                       | 10 +---------
 src/fm95.c                          |  6 ------
 4 files changed, 2 insertions(+), 45 deletions(-)

diff --git a/.vscode/.server-controller-port.log b/.vscode/.server-controller-port.log
index bc13603..082c432 100644
--- a/.vscode/.server-controller-port.log
+++ b/.vscode/.server-controller-port.log
@@ -1,5 +1,5 @@
 {
   "port": 13452,
-  "time": 1742842256267,
+  "time": 1742920067458,
   "version": "0.0.3"
 }
\ No newline at end of file
diff --git a/lib/filters.c b/lib/filters.c
index ed1017c..f8fe011 100644
--- a/lib/filters.c
+++ b/lib/filters.c
@@ -12,33 +12,4 @@ float apply_preemphasis(ResistorCapacitor *filter, float sample) {
 
 float hard_clip(float sample, float threshold) {
 	return fmaxf(-threshold, fminf(threshold, sample));
-}
-
-float sincf(float x) {
-    return (x == 0.0f) ? 1.0f : sinf(M_PI * x) / (M_PI * x);
-}
-
-void init_lpf(FIRFilter *lpf, float freq) {
-	int m = FILTER_LEN - 1;
-	float sum = 0.0f;
-
-	for(int n = 0; n < FILTER_LEN; n++) {
-		float x = n-m/2.0f;
-		lpf->filter[n] = sincf(2.0f*freq*x) * (0.54 - 0.46 * cosf(M_2PI * n / m));
-		sum += lpf->filter[n];
-	}
-
-	for(int n = 0; n < FILTER_LEN; n++) {
-		lpf->filter[n] /= sum;
-	}
-}
-
-float fir_filter(FIRFilter *fir, float sample) {
-    float out = 0.0f;
-    for(int i = 0; i < FILTER_LEN; i++) {
-        out += fir->filter[i] * sample;
-    }
-    fir->filter_idx++;
-    if(fir->filter_idx == FILTER_LEN) fir->filter_idx = 0;
-    return out;
 }
\ No newline at end of file
diff --git a/lib/filters.h b/lib/filters.h
index e42d014..ea4aa78 100644
--- a/lib/filters.h
+++ b/lib/filters.h
@@ -16,12 +16,4 @@ typedef struct
 void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate);
 float apply_preemphasis(ResistorCapacitor *filter, float sample);
 
-float hard_clip(float sample, float threshold);
-
-typedef struct filters
-{
-	float filter[FILTER_LEN];
-	int filter_idx;
-} FIRFilter;
-void init_lpf(FIRFilter *lpf, float freq);
-float fir_filter(FIRFilter *fir, float sample);
\ No newline at end of file
+float hard_clip(float sample, float threshold);
\ No newline at end of file
diff --git a/src/fm95.c b/src/fm95.c
index 8c3fa1a..2ccda40 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -414,10 +414,6 @@ int main(int argc, char **argv) {
 	ResistorCapacitor preemp_l, preemp_r;
 	init_preemphasis(&preemp_l, preemphasis_tau, sample_rate);
 	init_preemphasis(&preemp_r, preemphasis_tau, sample_rate);
-
-	FIRFilter lpf_l, lpf_r;
-	init_lpf(&lpf_l, 15000);
-	init_lpf(&lpf_r, 15000);
 	// #endregion
 
 	signal(SIGINT, stop);
@@ -475,8 +471,6 @@ int main(int argc, char **argv) {
 
 			float ready_l = apply_preemphasis(&preemp_l, l_in)*2;
 			float ready_r = apply_preemphasis(&preemp_r, r_in)*2;
-			ready_l = fir_filter(&lpf_l, ready_l);
-			ready_r = fir_filter(&lpf_l, ready_r);
 			ready_l = hard_clip(ready_l*audio_volume, clipper_threshold);
 			ready_r = hard_clip(ready_r*audio_volume, clipper_threshold);