/home/marsyas/marsyas/src/marsyas/Peak2Rms.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 "Peak2Rms.h"

using std::ostringstream;
using namespace Marsyas;

Peak2Rms::Peak2Rms(mrs_string name):MarSystem("Peak2Rms", name)
{
}

Peak2Rms::Peak2Rms(const Peak2Rms& a) : MarSystem(a)
{
}

Peak2Rms::~Peak2Rms()
{
}

MarSystem* 
Peak2Rms::clone() const 
{
  return new Peak2Rms(*this);
}

void 
Peak2Rms::myUpdate(MarControlPtr sender)
{
    (void) sender;
    setctrl("mrs_natural/onObservations",1);
    setctrl("mrs_natural/onSamples",1);
    setctrl("mrs_real/osRate", israte_ / inSamples_);
}

void 
Peak2Rms::myProcess(realvec& in, realvec& out)
{
    mrs_real peak = in.maxval();
    mrs_real rms = 0.0;
    mrs_natural t;

    for (t = 0; t < inSamples_; t++)
    {
         rms += in(0,t) * in(0,t);
    }
    rms /= inSamples_;
    rms = sqrt(rms);
    out(0) = peak/rms;
}

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