From e5e156ce32aaab31647e023c32f22b037b8f7d22 Mon Sep 17 00:00:00 2001
From: Chris <chris@ternar.tech>
Date: Mon, 30 Sep 2024 08:20:19 +0200
Subject: [PATCH] add averager

---
 synth/tx_operator.h | 12 ++++++++++--
 util/averager.h     | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 util/averager.h

diff --git a/synth/tx_operator.h b/synth/tx_operator.h
index de06d0a..f010754 100644
--- a/synth/tx_operator.h
+++ b/synth/tx_operator.h
@@ -1,7 +1,8 @@
 #pragma once
+#include "../clip/wavefolder.h"
+#include "../util/averager.h"
 #include "tx_envelope.h"
 #include "tx_sineosc.h"
-#include "../clip/wavefolder.h"
 
 namespace trnr {
 class tx_operator {
@@ -9,19 +10,22 @@ public:
 	tx_operator()
 		: ratio {1}
 		, amplitude {1.0f}
+		, wavefolding_amt {1.0f}
 	{
 	}
 
 	tx_envelope envelope;
 	tx_sineosc oscillator;
-	wavefolder wavefolding;
 	float ratio;
 	float amplitude;
+	float wavefolding_amt;
 
 	float process_sample(const bool& gate, const bool& trigger, const float& frequency, const float& velocity,
 						 const float& pm = 0)
 	{
 		float env = envelope.process_sample(gate, trigger);
+		float avg = m_averager.process_sample(wavefolding_amt);
+		m_wavefolder.amount = avg;
 
 		// drifts and sounds better!
 		if (envelope.is_busy()) {
@@ -38,5 +42,9 @@ public:
 		this->envelope.set_samplerate(samplerate);
 		this->oscillator.set_samplerate(samplerate);
 	}
+
+private:
+	averager<float, 1000> m_averager;
+	wavefolder m_wavefolder;
 };
 } // namespace trnr
diff --git a/util/averager.h b/util/averager.h
new file mode 100644
index 0000000..2ab606b
--- /dev/null
+++ b/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
\ No newline at end of file