add wavefolder

clip/wavefolder.h

@@ -0,0 +1,38 @@
+#pragma once
+
+namespace trnr {
+class wavefolder {
+public:
+	float amount = 1.f;
+
+	float process_sample(float& _sample)
+	{
+		if (amount > 1.f) { return fold(_sample * amount); }
+
+        return 0.f;
+	}
+
+private:
+	float fold(float _sample)
+	{
+		// fold positive values
+		if (_sample > 1.0) {
+			_sample = 2.0 - _sample;
+
+			if (_sample < 0.0) { _sample = -_sample; }
+
+			return fold(_sample);
+		}
+		// fold negative values
+		else if (_sample < -1.0) {
+			_sample = -2.0 - _sample;
+
+			if (_sample > 0.0) { _sample = -_sample; }
+
+			return fold(_sample);
+		} else {
+			return _sample;
+		}
+	}
+};
+}; // namespace trnr