even more stuff

core/src/dsp/window/blackman_harris.h

@@ -0,0 +1,10 @@
+#pragma once
+#include <math.h>
+#include "cosine.h"
+
+namespace dsp::window {
+    inline double blackmanHarris(double n, double N) {
+        const double coefs[] = { 0.35875, 0.48829, 0.14128, 0.01168 };
+        return cosine(n, N, coefs, sizeof(coefs) / sizeof(double));
+    }
+}