1 files changed, 46 insertions, 0 deletions
diff --git a/libs/ardour/tests/interpolation-test.cc b/libs/ardour/tests/interpolation-test.cc
new file mode 100644
index 0000000000..8b4f1f840b
--- /dev/null
+++ b/libs/ardour/tests/interpolation-test.cc
@@ -0,0 +1,46 @@
+#include <sigc++/sigc++.h>
+#include "interpolation-test.h"
+
+CPPUNIT_TEST_SUITE_REGISTRATION( InterpolationTest );
+
+void
+InterpolationTest::linearInterpolationTest ()
+{
+	std::cout << "\nLinear Interpolation Test\n";
+	std::cout << "\nSpeed: 1.0";
+	linear.set_speed (1.0);
+	nframes_t result = linear.interpolate (NUM_SAMPLES, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES - 1, result);
+
+	std::cout << "\nSpeed: 0.5";
+	linear.set_speed (0.5);
+	result = linear.interpolate (NUM_SAMPLES, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES / 2 - 1, result);
+
+	std::cout << "\nSpeed: 0.2";
+	linear.set_speed (0.2);
+	result = linear.interpolate (NUM_SAMPLES, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES / 5 - 2, result);
+
+	std::cout << "\nSpeed: 0.02";
+	linear.set_speed (0.02);
+	result = linear.interpolate (NUM_SAMPLES, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES / 50 - 2, result);
+	
+	std::cout << "\nSpeed: 2.0";
+	linear.set_speed (2.0);
+	result = linear.interpolate (NUM_SAMPLES / 2, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES - 2, result);
+
+/*
+    for (int i=0; i < NUM_SAMPLES / 5; ++i) {
+        std::cout << "input[" << i << "] = " << input[i] << "  output[" << i << "] = " << output[i] << std::endl;	
+    }
+*/
+	std::cout << "\nSpeed: 10.0";
+	linear.set_speed (10.0);
+	result = linear.interpolate (NUM_SAMPLES / 10, input, output);
+	CPPUNIT_ASSERT_EQUAL ((uint32_t)NUM_SAMPLES - 10, result);
+}
+
+