/home/marsyas/marsyas/src/marsyas/BICchangeDetector.h

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**  
** 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.
** 
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
** 
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software 
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef BICCHANGEDETECTOR_H
#define BICCHANGEDETECTOR_H

#include "MarSystem.h"
#include "QGMMModel.h"
#include <time.h> 

namespace Marsyas
{
    class Memory;

    class BICchangeDetector: public MarSystem
    {
    private: 
        mrs_natural segFrames_; //number of frames per audio segment
        mrs_natural minSegFrames_; //minimum nr of frames to avoid ill-cov matrices
        mrs_natural segHop_;
        mrs_natural nfeats_;
        mrs_natural BICTick_; // number of ticks so far
        mrs_real hopSeconds_; // number of millis per hop
        

        realvec C1_;
        realvec C2_;
        realvec C3_;
        realvec C4_;
        mrs_real dist12_;
        mrs_real dist34_;
        mrs_real BICdist_;
        
        //dynamic thresholding parameters
        mrs_natural nrPrevDists_;
        Memory* prevDists_;
        realvec pdists_;
        // the index of the latest distance in Memory prevDists_
        mrs_natural pIndex_; 
        mrs_real dynThres_;
        // dynamic threshold parameter
        mrs_real alpha1_;

        //BIC parameter
        mrs_real lambda_;

        //quasi-GMM model
        QGMMModel QGMMmodel_;
        
        MarControlPtr ctrl_reset_;
        MarControlPtr ctrl_prevDists_;
        MarControlPtr ctrl_alpha1_;
        MarControlPtr ctrl_lambda_;
        MarControlPtr ctrl_hopMS_; // number of millis per hop

        void addControls();
        void myUpdate(MarControlPtr sender);

    public:
        BICchangeDetector(std::string name);
        BICchangeDetector(const BICchangeDetector& a);
        ~BICchangeDetector();
        MarSystem* clone() const;  

        void myProcess(realvec& in, realvec& out);
    };

}//namespace Marsyas

#endif

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