/home/marsyas/marsyas/src/marsyas/FlowThru.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 "FlowThru.h"

using std::ostringstream;
using namespace Marsyas;
using std::cout;
using std::endl;


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

FlowThru::FlowThru(const FlowThru& a):MarSystem(a)
{
    ctrl_innerOut_ = getctrl("mrs_realvec/innerOut");
}

FlowThru::~FlowThru()
{

}

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

void 
FlowThru::addControls()
{
    addctrl("mrs_realvec/innerOut", realvec(), ctrl_innerOut_);
}


void 
FlowThru::myUpdate(MarControlPtr sender)
{
    //forward flow propagation
    //just pass input flow to the output
    MarSystem::myUpdate(sender);
    
    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();

        // update dataflow component MarSystems in order 
        for(mrs_natural i=1; i < marsystemsSize_; ++i){
            marsystems_[i]->setctrl(marsystems_[i]->ctrl_inObsNames_, 
                marsystems_[i-1]->ctrl_onObsNames_);
            marsystems_[i]->setctrl(marsystems_[i]->ctrl_inObservations_, 
                marsystems_[i-1]->ctrl_onObservations_);
            marsystems_[i]->setctrl(marsystems_[i]->ctrl_inSamples_, 
                marsystems_[i-1]->ctrl_onSamples_);
            marsystems_[i]->setctrl(marsystems_[i]->ctrl_israte_, 
                marsystems_[i-1]->ctrl_osrate_);
            marsystems_[i]->update();
        }
        
        //link the output of the last child MarSystem to the innerOut of FlowThru Composite
        //(linkTo() will automatically unlink ctrl_innerOut from any previous link target before
        //relinking it to the last MarSystem)
        ctrl_innerOut_->linkTo(marsystems_[marsystemsSize_-1]->ctrl_processedData_);

        
        
        for(mrs_natural i=0; i< marsystemsSize_; ++i)
        {
            MarControlAccessor acc(marsystems_[i]->ctrl_processedData_, NOUPDATE);
            realvec& processedData = acc.to<mrs_realvec>();

            if (processedData.getRows() != marsystems_[i]->ctrl_onObservations_->to<mrs_natural>()  ||
                processedData.getCols() != marsystems_[i]->ctrl_onSamples_->to<mrs_natural>())
            {
              
                processedData.create(marsystems_[i]->ctrl_onObservations_->to<mrs_natural>(), 
                    marsystems_[i]->ctrl_onSamples_->to<mrs_natural>());
            }

            if(i==marsystemsSize_-1)
            {
                MarControlAccessor acc(ctrl_innerOut_, NOUPDATE);
                realvec& innerOut = acc.to<mrs_realvec>();
                innerOut.create(marsystems_[i]->ctrl_onObservations_->to<mrs_natural>(),marsystems_[i]->ctrl_onSamples_->to<mrs_natural>());
            }
        }
    }
}

void
FlowThru::myProcess(realvec& in, realvec& out)
{
    // Add assertions about sizes [!]

    //input should be passed thru the output untouched!
    out = in;

  if(marsystemsSize_ >= 1)
    {
        for (mrs_natural i = 0; i < marsystemsSize_; ++i)
        {
            if (i==0)
            {
                MarControlAccessor acc(marsystems_[i]->ctrl_processedData_);
                realvec& slice = acc.to<mrs_realvec>();
                marsystems_[i]->process(in, slice); 
            }
            else if (i == marsystemsSize_-1)
            {
                MarControlAccessor accSlice(marsystems_[i-1]->ctrl_processedData_, true, true);
                realvec& slice = accSlice.to<mrs_realvec>();
                MarControlAccessor accInnerOut(ctrl_innerOut_);
                realvec& innerOut = accInnerOut.to<mrs_realvec>();
                
                
                marsystems_[i]->process(slice, innerOut);
            }
            else
            {
                MarControlAccessor acc1(marsystems_[i-1]->ctrl_processedData_, true, true);
                realvec& slice1 = acc1.to<mrs_realvec>();
                MarControlAccessor acc2(marsystems_[i]->ctrl_processedData_);
                realvec& slice2 = acc2.to<mrs_realvec>();
                marsystems_[i]->process(slice1, slice2);    
            }
        }
    }
    else if(marsystemsSize_ == 0) //composite has no children!
    {
        MRSWARN("FlowThru::process: composite has no children MarSystems - passing input to output without changes.");
    }
}

---