/home/marsyas/marsyas/src/marsyas/Shredder.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 "Shredder.h"

using namespace std;
using namespace Marsyas;

Shredder::Shredder(mrs_string name):MarSystem("Shredder", name)
{
    isComposite_ = true;
    addControls();
    nTimes_ = 5;
}

Shredder::Shredder(const Shredder& a) : MarSystem(a)
{
    ctrl_nTimes_ = getctrl("mrs_natural/nTimes");
    ctrl_accumulate_ = getctrl("mrs_bool/accumulate");
    nTimes_ = a.nTimes_;
}

Shredder::~Shredder()
{
}

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

void 
Shredder::addControls()
{
    addctrl("mrs_natural/nTimes", 5, ctrl_nTimes_);
    setctrlState("mrs_natural/nTimes", true);

    addctrl("mrs_bool/accumulate", false, ctrl_accumulate_);
    ctrl_accumulate_->setState(true);
}

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

    nTimes_ = ctrl_nTimes_->to<mrs_natural>();

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

        childOnSamples_ = marsystems_[0]->getctrl("mrs_natural/onSamples")->to<mrs_natural>();

        // forward flow propagation
        if(ctrl_accumulate_->isTrue())
        {
            setctrl("mrs_natural/onSamples", childOnSamples_*nTimes_);
        }
        else
        {
            setctrl("mrs_natural/onSamples", childOnSamples_);
        }
        setctrl("mrs_natural/onObservations", 
            marsystems_[0]->getctrl("mrs_natural/onObservations")->to<mrs_natural>());
        setctrl("mrs_real/osrate", 
            marsystems_[0]->getctrl("mrs_real/osrate"));
        setctrl("mrs_string/onObsNames", 
            marsystems_[0]->getctrl("mrs_string/onObsNames"));

        childIn_.create(marsystems_[0]->getctrl("mrs_natural/inObservations")->to<mrs_natural>(), 
            marsystems_[0]->getctrl("mrs_natural/inSamples")->to<mrs_natural>());

        if(ctrl_accumulate_->isTrue())
            childOut_.create(marsystems_[0]->getctrl("mrs_natural/onObservations")->to<mrs_natural>(),
                childOnSamples_);
        else
            childOut_.create(0,0); //just to save memory...
    }
    else //if composite is empty...
        MarSystem::myUpdate(sender);
}

void 
Shredder::myProcess(realvec& in, realvec& out)
{
    mrs_natural t,o,c;
    if(marsystemsSize_>0)
    {
        for (c = 0; c < nTimes_; ++c) 
        {
            //shred input
            for (o=0; o < inObservations_; o++)
                for (t = 0; t < inSamples_/nTimes_; t++)
                {
                    childIn_(o,t) = in(o, t + c * (inSamples_/nTimes_)) ;
                }
            
            if(ctrl_accumulate_->isTrue()) //accumulate child output
            {
                marsystems_[0]->process(childIn_, childOut_);

                for (o=0; o < onObservations_; o++)
                    for (t = 0; t < childOnSamples_; t++)
                    {
                        out(o, t + c * childOnSamples_) = childOut_(o,t);
                    }
            }
            else //no child output accumulation
            {
                marsystems_[0]->process(childIn_, out);
            }
        }
    }
    else //composite has no children!
    {
        MRSWARN("Shredder::process: composite has no children MarSystems - passing input to output without changes.");
        out = in;
    }

    /*
    MATLAB_PUT(in, "Schredder_in");
    MATLAB_PUT(out, "Schredder_out");
    MATLAB_EVAL("figure(1);imagesc(Schredder_in(1:2:end, :))");
    MATLAB_EVAL("figure(2);plot(Schredder_out)");
    */
}

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