c@225: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@225: 
c@225: /*
c@225:     QM DSP Library
c@225: 
c@225:     Centre for Digital Music, Queen Mary, University of London.
c@225:     This file copyright 2006 Martin Gasser.
c@309: 
c@309:     This program is free software; you can redistribute it and/or
c@309:     modify it under the terms of the GNU General Public License as
c@309:     published by the Free Software Foundation; either version 2 of the
c@309:     License, or (at your option) any later version.  See the file
c@309:     COPYING included with this distribution for more information.
c@225: */
c@225: 
cannam@489: #ifndef QM_DSP_TONALESTIMATOR_H
cannam@489: #define QM_DSP_TONALESTIMATOR_H
c@225: 
c@225: #include <valarray>
c@225: #include <numeric>
c@225: #include <algorithm>
c@225: #include <iostream>
c@225: 
c@225: class ChromaVector : public std::valarray<double>
c@225: {
c@225: public:
cannam@482:     ChromaVector(size_t uSize = 12) : std::valarray<double>() {
cannam@482:         resize(uSize, 0.0f);
cannam@482:     }
cannam@482:         
cannam@482:     virtual ~ChromaVector() {};
cannam@482:         
cannam@482:     void printDebug() {
cannam@482:         for (int i = 0; i < int(size()); i++) {
cannam@482:             std::cout <<  (*this)[i] << ";";
cannam@482:         }
cannam@482:         std::cout << std::endl;
cannam@482:     }
cannam@482:         
cannam@482:     void normalizeL1() {
cannam@482:         // normalize the chroma vector (L1 norm)
cannam@482:         double dSum = 0.0;
cannam@482:         
cannam@482:         for (size_t i = 0; i < 12; (dSum += std::abs((*this)[i++]))) ;
cannam@482:         for (size_t i = 0; i < 12; dSum > 0.0000001?((*this)[i] /= dSum):(*this)[i]=0.0, i++) ;
cannam@482:     }
c@225: 
cannam@482:     void clear() {
c@299:         for (size_t i = 0; i < 12; ++i) (*this)[i] = 0.0;
c@299:     }
c@225: };
c@225: 
c@225: class TCSVector : public std::valarray<double>
c@225: {
c@225: public:
cannam@482:     TCSVector() : std::valarray<double>() {
cannam@482:         resize(6, 0.0f);
cannam@482:     }
cannam@482:         
cannam@482:     virtual ~TCSVector() {};
c@225: 
cannam@482:     void printDebug() {
cannam@482:         for (int i = 0; i < int(size()); i++) {
cannam@482:             std::cout <<  (*this)[i] << ";";
cannam@482:         }
cannam@482:         std::cout << std::endl;
cannam@482:     }
cannam@482:         
cannam@482:     double magnitude() const {
cannam@482:         double dMag = 0.0;
cannam@482:                 
cannam@482:         for (size_t i = 0; i < 6; i++) {
cannam@482:             dMag += std::pow((*this)[i], 2.0);
cannam@482:         }
cannam@482:                 
cannam@482:         return std::sqrt(dMag);
cannam@482:     }
c@225: };
c@225: 
c@225: class TonalEstimator
c@225: {
c@225: public:
cannam@482:     TonalEstimator();
cannam@482:     virtual ~TonalEstimator();
cannam@482:     TCSVector transform2TCS(const ChromaVector& rVector);
cannam@482:     
c@225: protected:
cannam@482:     std::valarray< std::valarray<double> > m_Basis;
c@225: };
c@225: 
c@225: #endif // _TONALESTIMATOR_