diff tests/TestGetKeyMode.cpp @ 451:3f913390bcf2

(Incomplete) unit tests for chroma and key estimation

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/TestGetKeyMode.cpp	Thu May 23 13:29:02 2019 +0100
@@ -0,0 +1,113 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+#include "dsp/keydetection/GetKeyMode.h"
+
+#include <iostream>
+
+#include <cmath>
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(TestGetKeyMode)
+
+using std::cout;
+using std::endl;
+using std::string;
+using std::vector;
+
+string keyName(int index, bool minor)
+{
+    static string namesMajor[] = {
+        "C", "Db", "D", "Eb",
+        "E", "F", "F# / Gb", "G",
+        "Ab", "A", "Bb", "B"
+    };
+
+    static string namesMinor[] = {
+        "C", "C#", "D", "Eb / D#",
+        "E", "F", "F#", "G",
+        "G#", "A", "Bb", "B"
+    };
+
+    if (index < 1 || index > 12) return "";
+
+    std::string name;
+    if (minor) name = namesMinor[index - 1] + " minor";
+    else name = namesMajor[index - 1] + " major";
+    return name;
+}
+
+string midiPitchName(int midiPitch)
+{
+    static string names[] = {
+        "C",  "C#", "D",  "D#",
+        "E",  "F",  "F#", "G",
+        "G#", "A",  "A#", "B"
+    };
+
+    return names[midiPitch % 12];
+}
+
+vector<double> generateSinusoid(double frequency,
+                                int sampleRate,
+                                int length)
+{
+    vector<double> buffer;
+    buffer.reserve(length);
+    for (int i = 0; i < length; ++i) {
+        buffer.push_back(sin(i * M_PI * 2.0 * frequency / sampleRate));
+    }
+    return buffer;
+}
+    
+BOOST_AUTO_TEST_CASE(sinusoid_12tET)
+{
+    double concertA = 440.0;
+    int sampleRate = 44100;
+    
+    for (int midiPitch = 48; midiPitch < 96; ++midiPitch) {
+
+        cout << endl;
+
+        GetKeyMode gkm(sampleRate, concertA, 10, 10);
+        int blockSize = gkm.getBlockSize();
+        int hopSize = gkm.getHopSize();
+        cerr << "blockSize = " << blockSize
+             << ", hopSize = " << hopSize << endl;
+
+        double frequency = concertA * pow(2.0, (midiPitch - 69.0) / 12.0);
+        cout << "midiPitch = " << midiPitch
+             << ", name = " << midiPitchName(midiPitch)
+             << ", frequency = " << frequency << endl;
+
+        int blocks = 4;
+        int totalLength = blockSize * blocks;
+        vector<double> signal = generateSinusoid(frequency, sampleRate,
+                                                 totalLength);
+
+        int key;
+        
+        for (int offset = 0; offset + blockSize < totalLength;
+             offset += hopSize) {
+            int k = gkm.process(signal.data() + offset);
+            if (offset == 0) {
+                key = k;
+            } else {
+                BOOST_CHECK_EQUAL(key, k);
+            }
+        }
+
+        bool minor = (key > 12);
+
+        int tonic = key;
+        if (minor) tonic -= 12;
+
+        string name = keyName(tonic, minor);
+        cout << "key value = " << key << ", name = " << name << endl;
+    }
+}
+
+BOOST_AUTO_TEST_SUITE_END()