From f440728644ad3698ffd6af1abcfcc07aad5793c3 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <clyne@bitgloo.com>
Date: Tue, 8 Aug 2023 23:10:02 -0400
Subject: initial commit

* combine all source files into this monorepo

* convert all third-party source packages into submodules

* small fixes due to changes in latest third-part packages
---
 gui/examples/6_iir_test.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 gui/examples/6_iir_test.cpp

(limited to 'gui/examples/6_iir_test.cpp')

diff --git a/gui/examples/6_iir_test.cpp b/gui/examples/6_iir_test.cpp
new file mode 100644
index 0000000..e0b266d
--- /dev/null
+++ b/gui/examples/6_iir_test.cpp
@@ -0,0 +1,23 @@
+/**
+ * 6_iir_test.cpp
+ * Written by Clyne Sullivan.
+ *
+ * Implements a simple infinite impulse response (IIR) filter using an alpha
+ * parameter.
+ * To build upon this example, try setting `alpha` with a parameter knob:
+ * alpha = param1() / 4095.0
+ */
+
+Sample* process_data(Samples samples)
+{
+	constexpr float alpha = 0.7;
+
+	static Sample prev = 2048;
+
+	samples[0] = (1 - alpha) * samples[0] + alpha * prev;
+	for (unsigned int i = 1; i < SIZE; i++)
+		samples[i] = (1 - alpha) * samples[i] + alpha * samples[i - 1];
+	prev = samples[SIZE - 1];
+
+	return samples;
+}
-- 
cgit v1.2.3