/home/marsyas/marsyas/src/marsyas/SliceShuffle.cpp

/*
** Copyright (C) 2010 Stefaan Lippens
**
** 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 "SliceShuffle.h"

using namespace std;
using namespace Marsyas;

SliceShuffle::SliceShuffle(mrs_string name) : MarSystem("SliceShuffle", name)
{
    addControls();
}

SliceShuffle::SliceShuffle(const SliceShuffle& a) : MarSystem(a)
{
    ctrl_bufferSize_ = getControl("mrs_natural/bufferSize");
}


SliceShuffle::~SliceShuffle()
{
}

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

void
SliceShuffle::addControls()
{

    addControl("mrs_natural/bufferSize", 10, ctrl_bufferSize_);
    setctrlState("mrs_natural/bufferSize", true);
}

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

    MarSystem::myUpdate(sender);

    // Cache the buffer size
    bufferSize_ = getControl("mrs_natural/bufferSize")->to<mrs_natural>();

    // Allocate the slice buffer.
    sliceBuffer_.stretch(inObservations_, inSamples_ * bufferSize_);
    sliceBuffer_.setval(0.0);
}

void
SliceShuffle::myProcess(realvec& in, realvec& out)
{
    mrs_natural t,o;
    mrs_natural slice_t = (rand() % bufferSize_) * inSamples_;

    for (o = 0; o < inObservations_; o++)
    {
        for (t = 0; t < inSamples_; t++)
        {
            out(o, t) = sliceBuffer_(o, slice_t + t);
            sliceBuffer_(o, slice_t + t) = in(o, t);
        }
    }
}

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