diff dsp/rateconversion/TestResampler.cpp @ 137:dce8337a83c8

First cut at resampler (not quite correct)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dsp/rateconversion/TestResampler.cpp	Fri Oct 11 18:00:51 2013 +0100
@@ -0,0 +1,73 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+#include "Resampler.h"
+
+#include <iostream>
+
+#include <cmath>
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(TestResampler)
+
+using std::cout;
+using std::endl;
+
+void
+testResampler(int sourceRate,
+	      int targetRate,
+	      int n,
+	      double *in,
+	      int m,
+	      double *expected)
+{
+    Resampler r(sourceRate, targetRate);
+    int latency = r.getLatency();
+    std::cerr << "latency = " << latency << std::endl;
+
+    int m1 = m + latency;
+    int n1 = int((m1 * sourceRate) / targetRate);
+
+    double *inPadded = new double[n1];
+    double *outPadded = new double[m1];
+
+    for (int i = 0; i < n1; ++i) {
+	if (i < n) inPadded[i] = in[i];
+	else inPadded[i] = 0.0;
+    }
+    
+    for (int i = 0; i < m1; ++i) {
+	outPadded[i] = -999.0;
+    }
+
+    int got = r.process(inPadded, outPadded, n1);
+
+    std::cerr << n1 << " in, " << got << " out" << std::endl;
+
+    BOOST_CHECK_EQUAL(got, m1);
+
+    std::cerr << "results including latency padding:" << std::endl;
+    for (int i = 0; i < m1; ++i) {
+	std::cerr << outPadded[i] << " ";
+	if (i % 6 == 5) std::cerr << "\n";
+    }
+    std::cerr << "\n";
+
+    for (int i = latency; i < m1; ++i) {
+	BOOST_CHECK_CLOSE(outPadded[i], expected[i-latency], 1e-8);
+    }
+    delete[] outPadded;
+    delete[] inPadded;
+}
+
+BOOST_AUTO_TEST_CASE(sameRate)
+{
+    double d[] = { 0, 0.1, -0.3, -0.4, -0.3, 0, 0.5, 0.2, 0.8, -0.1 };
+    testResampler(4, 4, 10, d, 10, d);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+