diff test/TestCQFrequency.cpp @ 131:6b13f9c694a8

Start introducing the tests

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/TestCQFrequency.cpp	Mon May 19 10:21:51 2014 +0100
@@ -0,0 +1,74 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+#include "cq/CQSpectrogram.h"
+
+#include "dsp/Window.h"
+
+#include <cmath>
+#include <vector>
+
+using std::vector;
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(TestCQFrequency)
+
+// The principle here is to feed a single windowed sinusoid into a
+// small CQ transform and check that the output has its peak bin at
+// the correct frequency. We can repeat for different frequencies both
+// inside and outside the frequency range supported by the CQ. We
+// should also repeat for CQSpectrogram outputs as well as the raw CQ.
+
+// Set up fs/2 = 50, frequency range 10 -> 40 i.e. 2 octaves, fixed
+// duration of 2 seconds
+static const double sampleRate = 100;
+static const double cqmin = 10;
+static const double cqmax = 40;
+static const double bpo = 4;
+static const int duration = sampleRate * 2;
+
+// Fairly arbitrary max value for CQ bins other than the "correct" one
+static const double threshold = 0.08;
+
+void
+checkCQFreqOutput(const CQSpectrogram::RealBlock &output, double freq)
+{
+    
+}
+
+void
+testCQFrequency(double freq)
+{
+    CQParameters params(sampleRate, cqmin, cqmax, bpo);
+    CQSpectrogram cq(params, CQSpectrogram::InterpolateLinear);
+
+    vector<double> input;
+    for (int i = 0; i < duration; ++i) {
+        input.push_back(sin((i * 2 * M_PI * freq) / sampleRate));
+    }
+    Window<double>(HanningWindow, duration).cut(input.data());
+
+    CQSpectrogram::RealBlock output = cq.process(input);
+    CQSpectrogram::RealBlock rest = cq.getRemainingOutput();
+    output.insert(output.end(), rest.begin(), rest.end());
+
+    checkCQFreqOutput(output, freq);
+}
+
+BOOST_AUTO_TEST_CASE(freq_0) { testCQFrequency(0); }
+BOOST_AUTO_TEST_CASE(freq_5) { testCQFrequency(5); }
+BOOST_AUTO_TEST_CASE(freq_10) { testCQFrequency(10); }
+BOOST_AUTO_TEST_CASE(freq_15) { testCQFrequency(15); }
+BOOST_AUTO_TEST_CASE(freq_20) { testCQFrequency(20); }
+BOOST_AUTO_TEST_CASE(freq_25) { testCQFrequency(25); }
+BOOST_AUTO_TEST_CASE(freq_30) { testCQFrequency(30); }
+BOOST_AUTO_TEST_CASE(freq_35) { testCQFrequency(35); }
+BOOST_AUTO_TEST_CASE(freq_40) { testCQFrequency(40); }
+BOOST_AUTO_TEST_CASE(freq_45) { testCQFrequency(45); }
+BOOST_AUTO_TEST_CASE(freq_50) { testCQFrequency(50); }
+
+BOOST_AUTO_TEST_SUITE_END()
+