/home/marsyas/marsyas/src/marsyas/Mean.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 "Mean.h"

using std::ostringstream;
using namespace Marsyas;

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


Mean::~Mean()
{
}


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

void
Mean::myUpdate(MarControlPtr sender)
{
    (void) sender;
    MRSDIAG("Mean.cpp - Mean:myUpdate");

    ctrl_onSamples_->setValue((mrs_natural)1, NOUPDATE);
    ctrl_onObservations_->setValue(ctrl_inObservations_, NOUPDATE);
    ctrl_osrate_->setValue(ctrl_israte_, NOUPDATE);

    // Allocate memory for the row buffer.
    obsrow_.create(ctrl_inSamples_->to<mrs_natural>());

    //defaultUpdate(); [!]
    // \todo what is this doing here?
    inObservations_ = ctrl_inObservations_->to<mrs_natural>();

    // Add prefix to the observation names.
    mrs_string inObsNames = ctrl_inObsNames_->to<mrs_string>();
    ctrl_onObsNames_->setValue(obsNamesAddPrefix(inObsNames, "Mean_"), NOUPDATE);
}

void
Mean::myProcess(realvec& in, realvec& out)
{
    mrs_natural t,o;
    out.setval(0.0);
    for (o=0; o < inObservations_; o++)
    {
        for (t = 0; t < inSamples_; t++)
        {
            // Calculate mean
            obsrow_(t) = in(o,t);
        }
        out(o,0) = obsrow_.mean();
    }
    // INEFFICIENT A LOT OF MEMORY COPYING AT EVERY TICK
    // out = in.meanObs();
}

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