/home/marsyas/marsyas/src/marsyas/RemoveObservations.cpp

/*
** Copyright (C) 1998-2010 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 "common.h" 
#include "RemoveObservations.h"

using std::ostringstream;
using namespace Marsyas;

RemoveObservations::RemoveObservations(mrs_string name) : MarSystem("RemoveObservations", name)
{
    addControls();
    lowestObs_ = 0;
    numObs_ = inObservations_;
}

RemoveObservations::RemoveObservations(const RemoveObservations& a) : MarSystem(a)
{
    lowestObs_ = 0;
    numObs_ = inObservations_;
}


RemoveObservations::~RemoveObservations()
{
}

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

void
RemoveObservations::addControls()
{

    addctrl("mrs_real/lowCutoff", 0.0);
    addctrl("mrs_real/highCutoff", 1.0);

}

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

    MarSystem::myUpdate(sender);

    // round down is the default with C math
    lowestObs_ = inObservations_
            * getctrl("mrs_real/lowCutoff")->to<mrs_real>();
    // round up with ceil()
    numObs_ = ceil( inObservations_
            * getctrl("mrs_real/highCutoff")->to<mrs_real>()
            ) - lowestObs_;

    ctrl_onObservations_->setValue(numObs_, NOUPDATE);

    // remove unused observation names, so they don't
    // overwrite other observations from other parts
    // of the network
    mrs_string names = ctrl_inObsNames_->to<mrs_string>();
    int lowNamePos = 0;
    int highNamePos = 0;
    for (int i=0; i < lowestObs_; i++) {
        lowNamePos = names.find(",", lowNamePos) + 1;
    }
    for (int i=0; i < numObs_; i++) {
        highNamePos = names.find(",", highNamePos) + 1;
    }
    if (highNamePos > 0) {
        names = names.substr(lowNamePos, highNamePos);
        ctrl_onObsNames_->setValue(names, NOUPDATE);
    }
}

void
RemoveObservations::myProcess(realvec& in, realvec& out)
{
    mrs_natural t,o;

    for (o = 0; o < numObs_; o++)
    {
        for (t = 0; t < inSamples_; t++)
        {
            out(o, t) = in(o+lowestObs_, t);
        }
    }
}

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