annotate dsp/tonal/TonalEstimator.h @ 30:a251fb0de594

* Make MFCC able to accept already-FFT'd input, and simplify API a bit
* Add log power value to MFCC, restore windowing, and avoid some heap allocs
* In HMM, bail out of iteration if loglik hits NaN

/* -*- 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.
    All rights reserved.
*/

#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 < 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++);

	}
	
};

class TCSVector : public std::valarray<double>
{
public:
	TCSVector() : std::valarray<double>()
	{ resize(6, 0.0f); }
	
	virtual ~TCSVector() {};

	void printDebug()
	{
		for (int i = 0; i < 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_