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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Vamp Tempogram Plugin
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5 Carl Bussey, Centre for Digital Music, Queen Mary University of London
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6 Copyright 2014 Queen Mary University of London.
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7
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8 This program is free software; you can redistribute it and/or
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9 modify it under the terms of the GNU General Public License as
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10 published by the Free Software Foundation; either version 2 of the
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11 License, or (at your option) any later version. See the file
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12 COPYING included with this distribution for more information.
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13 */
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14
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15 #ifndef __Tempogram__NoveltyCurve__
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16 #define __Tempogram__NoveltyCurve__
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17
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18 #include <iostream>
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19 #include <cmath>
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20 #include <vector>
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21 #include <iostream>
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22 #include "FIRFilter.h"
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23 #include "WindowFunction.h"
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24 #include <cassert>
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25 #include "SpectrogramProcessor.h"
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26
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27 class NoveltyCurveProcessor{
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28 float m_samplingFrequency;
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29 size_t m_fftLength;
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30 size_t m_blockSize;
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31 int m_compressionConstant;
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32 size_t m_numberOfBands;
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33 int * m_pBandBoundaries;
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34 float * m_pBandSum;
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35
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36 void initialise();
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37 void cleanup();
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38 void subtractLocalAverage(std::vector<float> &noveltyCurve, const size_t &smoothLength) const;
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39 void smoothedDifferentiator(SpectrogramTransposed &spectrogram, const size_t &smoothLength) const;
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40 void halfWaveRectify(SpectrogramTransposed &spectrogram) const;
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41
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42 public:
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43
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44 NoveltyCurveProcessor(const float &samplingFrequency, const size_t &fftLength, const size_t &compressionConstant);
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45 ~NoveltyCurveProcessor();
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46 std::vector<float> spectrogramToNoveltyCurve(const Spectrogram &spectrogram) const;
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47 };
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48
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49 #endif /* defined(__Tempogram__NoveltyCurve__) */
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