1 files changed, 54 insertions, 0 deletions
diff --git a/test/ipa/libipa/interpolator.cpp b/test/ipa/libipa/interpolator.cpp
new file mode 100644
index 00000000..6abb7760
--- /dev/null
+++ b/test/ipa/libipa/interpolator.cpp
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2024, Ideas on Board Oy
+ *
+ * Interpolator tests
+ */
+
+#include "../src/ipa/libipa/interpolator.h"
+
+#include <cmath>
+#include <iostream>
+#include <map>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+using namespace ipa;
+
+#define ASSERT_EQ(a, b)                    \
+	if ((a) != (b)) {                  \
+		printf(#a " != " #b "\n"); \
+		return TestFail;           \
+	}
+
+class InterpolatorTest : public Test
+{
+protected:
+	int run()
+	{
+		Interpolator<int> interpolator;
+		interpolator.setData({ { 10, 100 }, { 20, 200 }, { 30, 300 } });
+
+		ASSERT_EQ(interpolator.getInterpolated(0), 100);
+		ASSERT_EQ(interpolator.getInterpolated(10), 100);
+		ASSERT_EQ(interpolator.getInterpolated(20), 200);
+		ASSERT_EQ(interpolator.getInterpolated(25), 250);
+		ASSERT_EQ(interpolator.getInterpolated(30), 300);
+		ASSERT_EQ(interpolator.getInterpolated(40), 300);
+
+		interpolator.setQuantization(10);
+		unsigned int q = 0;
+		ASSERT_EQ(interpolator.getInterpolated(25, &q), 300);
+		ASSERT_EQ(q, 30);
+		ASSERT_EQ(interpolator.getInterpolated(24, &q), 200);
+		ASSERT_EQ(q, 20);
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(InterpolatorTest)