c@451: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@451: 
c@451: #include "dsp/chromagram/Chromagram.h"
c@451: 
c@451: #include <iostream>
c@451: 
c@451: #include <cmath>
c@451: 
c@451: #define BOOST_TEST_DYN_LINK
c@451: #define BOOST_TEST_MAIN
c@451: 
c@451: #include <boost/test/unit_test.hpp>
c@451: 
c@451: BOOST_AUTO_TEST_SUITE(TestChromagram)
c@451: 
c@451: using std::cout;
c@451: using std::endl;
c@451: using std::string;
c@451: using std::vector;
c@451: 
c@451: string midiPitchName(int midiPitch)
c@451: {
c@451:     static string names[] = {
c@451:         "C",  "C#", "D",  "D#",
c@451:         "E",  "F",  "F#", "G",
c@451:         "G#", "A",  "A#", "B"
c@451:     };
c@451: 
c@451:     return names[midiPitch % 12];
c@451: }
c@451: 
c@451: vector<double> generateSinusoid(double frequency,
c@451:                                 int sampleRate,
c@451:                                 int length)
c@451: {
c@451:     vector<double> buffer;
c@451:     buffer.reserve(length);
c@451:     for (int i = 0; i < length; ++i) {
c@451:         buffer.push_back(sin(i * M_PI * 2.0 * frequency / sampleRate));
c@451:     }
c@451:     return buffer;
c@451: }
c@451: 
c@451: double frequencyForPitch(int midiPitch, double concertA)
c@451: {
c@451:     return concertA * pow(2.0, (midiPitch - 69.0) / 12.0);
c@451: }
c@451: 
c@451: BOOST_AUTO_TEST_CASE(sinusoid_12tET)
c@451: {
c@451:     double concertA = 440.0;
c@451:     int sampleRate = 44100;
c@451:     int bpo = 60;
c@451: 
c@451:     ChromaConfig config {
c@451:         sampleRate,
c@451:         frequencyForPitch(36, concertA),
c@451:         frequencyForPitch(108, concertA),
c@451:         bpo,
c@451:         0.0054,
c@451:         MathUtilities::NormaliseNone
c@451:     };
c@451:     
c@451:     Chromagram chroma(config);
c@451:     
c@451:     for (int midiPitch = 48; midiPitch < 96; ++midiPitch) {
c@451: 
c@451:         cout << endl;
c@451: 
c@451:         int blockSize = chroma.getFrameSize();
c@451:         int hopSize = chroma.getHopSize();
c@451:         cerr << "blockSize = " << blockSize
c@451:              << ", hopSize = " << hopSize << endl;
c@451: 
c@451:         double frequency = frequencyForPitch(midiPitch, concertA);
c@451:         int expectedPeakBin = ((midiPitch - 36) * 5) % bpo;
c@451: 
c@451:         cout << "midiPitch = " << midiPitch
c@451:              << ", name = " << midiPitchName(midiPitch)
c@451:              << ", frequency = " << frequency
c@451:              << ", expected peak bin = "
c@451:              << expectedPeakBin << endl;
c@451:         
c@451:         vector<double> signal = generateSinusoid(frequency,
c@451:                                                  sampleRate,
c@451:                                                  blockSize);
c@451: 
c@451:         double *output = chroma.process(signal.data());
c@451: 
c@451:         int peakBin = -1;
c@451:         double peakValue = 0.0;
c@451: 
c@451:         for (int i = 0; i < bpo; ++i) {
c@451:             if (i == 0 || output[i] > peakValue) {
c@451:                 peakValue = output[i];
c@451:                 peakBin = i;
c@451:             }
c@451:         }
c@451: 
c@451:         cout << "peak value = " << peakValue << " at bin " << peakBin << endl;
c@451:         cout << "(neighbouring values are "
c@451:              << (peakBin > 0 ? output[peakBin-1] : output[bpo-1])
c@451:              << " and "
c@451:              << (peakBin+1 < bpo ? output[peakBin+1] : output[0])
c@451:              << ")" << endl;
c@451: 
c@451:         BOOST_CHECK_EQUAL(peakBin, expectedPeakBin);
c@451:     }
c@451: }
c@451: 
c@451: BOOST_AUTO_TEST_SUITE_END()