/home/marsyas/marsyas/src/marsyas/Normalize.cpp

/*
** 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.
*/

#include "Normalize.h"

using std::ostringstream;
using namespace Marsyas;

Normalize::Normalize(mrs_string name):MarSystem("Normalize",name)
{
}

Normalize::~Normalize()
{
}

MarSystem* 
Normalize::clone() const 
{
    return new Normalize(*this);
}

void 
Normalize::myProcess(realvec& in, realvec& out)
{
    mrs_real rms = 0.0;
    mrs_natural t,o;

    for (t = 0; t < inSamples_; t++)  
    {
        rms = 0.0;
        // calculate 2-norm 
        for (o=0; o < inObservations_; o++)
        {
            rms += (in(o,t) * in(o,t));
        }
        rms = sqrt(rms);
        // normalize 
        for (o=0; o < inObservations_; o++)
        {
            out(o,t) = in(o,t) / rms;
        }
    }
}

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