oh

lib/constants.h

@@ -1,12 +1,7 @@
 #pragma once
-#include <math.h>
 #ifndef M_PI
 #define M_PI 3.14159265358979323846
 #endif
 #ifndef M_2PI
 #define M_2PI (M_PI * 2.0)
 #endif
-
-inline float sincf(float x) {
-    return (x == 0.0f) ? 1.0f : sinf(M_PI * x) / (M_PI * x);
-}

lib/filters.c

@@ -14,6 +14,10 @@ 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_bpf(FIRFilter *bpf, float start, float end) {
 	int m = FILTER_LEN - 1;
 	float sum = 0.0f;

lib/filters.h

@@ -1,6 +1,7 @@
 #pragma once
 #include <string.h>
 #include <stdlib.h>
+#include <math.h>
 #include "constants.h"
 #include "oscillator.h"