TonalEstimator.h

Go to the documentation of this file.

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