add averager

util/averager.h

@@ -0,0 +1,33 @@
+#pragma once
+#include <array>
+
+namespace trnr {
+template <typename t_sample, unsigned int sample_size>
+class averager {
+public:
+	averager() { samples.fill(0); }
+
+	t_sample process_sample(t_sample& _sample)
+	{
+		t_sample sum = t_sample(0);
+
+		for (unsigned int i = 0; i < sample_size; i++) {
+
+			if (i < sample_size - 1) {
+				// shift to the left
+				samples[i] = samples[i + 1];
+			} else {
+				// put new sample last
+				samples[i] = _sample;
+			}
+
+			sum += samples[i];
+		}
+
+		return sum / sample_size;
+	}
+
+private:
+	std::array<t_sample, sample_size> samples;
+};
+} // namespace trnr