comparison examples/10-Instruments/airharp/Waveguide.h @ 468:85cf9c0da052 prerelease

merge

+/*
+ *
+ * Simple 1-Dimensional Waveguide
+ *
+ * Christian Heinrichs 04/2015
+ *
+ */
+
+#ifndef WAVEGUIDE_H_
+#define WAVEGUIDE_H_
+
+#include <cmath>
+
+#ifndef WG_BUFFER_SIZE
+#define WG_BUFFER_SIZE 4096
+#endif
+
+#ifndef FILTER_BUFFER_SIZE
+#define FILTER_BUFFER_SIZE 4
+#endif
+
+#ifndef		M_PI
+#define		M_PI		3.14159265358979323846264338
+#endif
+
+class Waveguide
+{
+
+public:
+
+	Waveguide();
+	void setup();
+	float update(float in);
+	void updateFilterCoeffs(float frequency);
+	void setFrequency(float frequency);
+
+private:
+
+	double _dt;
+	float _periodInMilliseconds;
+	int _periodInSamples;
+
+	float _buffer[WG_BUFFER_SIZE];
+	int _readPtr;
+
+	float _filterBuffer_x[FILTER_BUFFER_SIZE];
+	float _filterBuffer_y[FILTER_BUFFER_SIZE];
+	float _hipBuffer_x[FILTER_BUFFER_SIZE];
+	float _hipBuffer_y[FILTER_BUFFER_SIZE];
+	int _filterReadPtr;
+
+	float b0_lp,b1_lp,b2_lp,a1_lp, a2_lp;
+	float _lastY,_lastX;
+
+};
+
+#endif