/home/marsyas/marsyas/src/marsyas/PeakDistanceHorizontality.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 MARSYAS_PeakDistanceHorizontality_H
#define MARSYAS_PeakDistanceHorizontality_H

#include "MarSystem.h"

namespace Marsyas
{
    class marsyas_EXPORT PeakDistanceHorizontality: public MarSystem
    {
    private:

        void addControls();

        void myUpdate(MarControlPtr sender);

        mrs_real ComputeHorizontality(mrs_real diffX, mrs_real diffY);
        //mrs_real ComputeHorizontality(mrs_real freq1, mrs_real freq2);

        inline mrs_real sigmoid (mrs_real val)
        {
            return (1. / (1. + exp(sigSteepness_ * (val - sigCutOff_))));
        }

        inline mrs_real gaussian (mrs_real x)
        {
            return exp (-(x*x)/(2*(sigCutOff_*sigCutOff_)));// / sqrt (TWOPI*std);
        }

        MarControlPtr   ctrl_horizvert_,
                        ctrl_rangeX_,
                        ctrl_rangeY_;

        mrs_realvec     weights_;
        mrs_real        sigSteepness_,
                        sigCutOff_;

    public:
        PeakDistanceHorizontality(std::string name);

        PeakDistanceHorizontality(const PeakDistanceHorizontality& a);

        ~PeakDistanceHorizontality();

        MarSystem* clone() const;

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

}
//namespace Marsyas

#endif
//MARSYAS_PeakDistanceHorizontality_H

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