/home/marsyas/marsyas/src/marsyas/SilenceRemove.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 "SilenceRemove.h"

using namespace std;
using namespace Marsyas;

SilenceRemove::SilenceRemove(mrs_string name):MarSystem("SilenceRemove",name)
{
    isComposite_ = true;
    addControls();
}

SilenceRemove::SilenceRemove(const SilenceRemove& a): MarSystem(a)
{
    ctrl_threshold_ = getctrl("mrs_real/threshold");
}

SilenceRemove::~SilenceRemove()
{

}

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

void 
SilenceRemove::addControls()
{
    addctrl("mrs_real/threshold", 0.01, ctrl_threshold_);
    setctrlState("mrs_real/threshold", true);
}

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

    threshold_ = ctrl_threshold_->to<mrs_real>();

    if (marsystemsSize_ > 0)
    {
        //propagate in flow controls to first child
        marsystems_[0]->setctrl("mrs_natural/inObservations", inObservations_);
        marsystems_[0]->setctrl("mrs_natural/inSamples", inSamples_);
        marsystems_[0]->setctrl("mrs_real/israte", israte_);
        marsystems_[0]->setctrl("mrs_string/inObsNames", inObsNames_);
        marsystems_[0]->update();

        // forward flow propagation
        ctrl_onSamples_->setValue(ctrl_inSamples_, NOUPDATE);
        ctrl_onObservations_->setValue(ctrl_inObservations_, NOUPDATE);
        ctrl_osrate_->setValue(ctrl_israte_, NOUPDATE);
        ctrl_onObsNames_->setValue(ctrl_inObsNames_, NOUPDATE);

        //marsystems_[0]->update(); //lmartins: shouldn't this have already been called?! [?]

        if (ctrl_hasData_.isInvalid()) 
            ctrl_hasData_ = marsystems_[0]->getctrl("mrs_bool/hasData");
    }
    else //if composite is empty...
        MarSystem::myUpdate(sender);
}

void 
SilenceRemove::myProcess(realvec& in, realvec& out)
{
    mrs_real rms = 0.0;
    mrs_natural count = 0;
    mrs_natural t,o;

    if(marsystemsSize_>0)
    {
        do 
        {
            marsystems_[0]->process(in, out);

            for (o=0; o < onObservations_; o++)
                for (t = 0; t < onSamples_; t++)
                {
                    rms += (out(o,t) * out(o,t));
                    count++;
                }
            rms /= count;
            rms = sqrt(rms);
            count = 0;
        } while (rms < threshold_ && (ctrl_hasData_->isTrue())); 
    }
    else //composite has no children!
    {
        MRSWARN("SilenceRemove::process: composite has no children MarSystems - passing input to output without changes.");
        out = in;
    }
}

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