Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/SliceShuffle.cpp
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00001 /*
00002 ** Copyright (C) 2010 Stefaan Lippens
00003 **
00004 ** This program is free software; you can redistribute it and/or modify
00005 ** it under the terms of the GNU General Public License as published by
00006 ** the Free Software Foundation; either version 2 of the License, or
00007 ** (at your option) any later version.
00008 **
00009 ** This program is distributed in the hope that it will be useful,
00010 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 ** GNU General Public License for more details.
00013 **
00014 ** You should have received a copy of the GNU General Public License
00015 ** along with this program; if not, write to the Free Software
00016 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 */
00018 
00019 #include "SliceShuffle.h"
00020 #include "../common_source.h"
00021 
00022 using namespace std;
00023 using namespace Marsyas;
00024 
00025 SliceShuffle::SliceShuffle(mrs_string name) : MarSystem("SliceShuffle", name)
00026 {
00028   addControls();
00029 }
00030 
00031 SliceShuffle::SliceShuffle(const SliceShuffle& a) : MarSystem(a)
00032 {
00035   ctrl_bufferSize_ = getControl("mrs_natural/bufferSize");
00036 }
00037 
00038 
00039 SliceShuffle::~SliceShuffle()
00040 {
00041 }
00042 
00043 MarSystem*
00044 SliceShuffle::clone() const
00045 {
00046   return new SliceShuffle(*this);
00047 }
00048 
00049 void
00050 SliceShuffle::addControls()
00051 {
00053 
00054   addControl("mrs_natural/bufferSize", 10, ctrl_bufferSize_);
00055   setctrlState("mrs_natural/bufferSize", true);
00056 }
00057 
00058 void
00059 SliceShuffle::myUpdate(MarControlPtr sender)
00060 {
00061   MRSDIAG("SliceShuffle.cpp - SliceShuffle:myUpdate");
00062 
00064   MarSystem::myUpdate(sender);
00065 
00066   // Cache the buffer size
00067   bufferSize_ = getControl("mrs_natural/bufferSize")->to<mrs_natural>();
00068 
00069   // Allocate the slice buffer.
00070   sliceBuffer_.stretch(inObservations_, inSamples_ * bufferSize_);
00071   sliceBuffer_.setval(0.0);
00072 }
00073 
00074 void
00075 SliceShuffle::myProcess(realvec& in, realvec& out)
00076 {
00077   mrs_natural t,o;
00079   mrs_natural slice_t = (rand() % bufferSize_) * inSamples_;
00080 
00082   for (o = 0; o < inObservations_; o++)
00083   {
00084     for (t = 0; t < inSamples_; t++)
00085     {
00086       out(o, t) = sliceBuffer_(o, slice_t + t);
00087       sliceBuffer_(o, slice_t + t) = in(o, t);
00088     }
00089   }
00090 }