Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/AbsMax.cpp
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00001 /*
00002 ** Copyright (C) 1998-2010 George Tzanetakis <gtzan@cs.uvic.ca>
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 
00020 #include "AbsMax.h"
00021 
00022 using std::ostringstream;
00023 using namespace Marsyas;
00024 
00025 AbsMax::AbsMax(mrs_string name): MarSystem("AbsMax",name)
00026 {
00027 }
00028 
00029 AbsMax::~AbsMax()
00030 {
00031 }
00032 
00033 MarSystem*
00034 AbsMax::clone() const
00035 {
00036   return new AbsMax(*this);
00037 }
00038 
00039 void
00040 AbsMax::myUpdate(MarControlPtr sender)
00041 {
00042   // Start with the default MarSystem setup with equal input/output
00043   // stream format ...
00044   MarSystem::myUpdate(sender);
00045 
00046   // ... but change the number and rate of output samples.
00047   setControl("mrs_natural/onSamples",  (mrs_natural)1);
00048   setControl("mrs_real/osrate",
00049              getControl("mrs_real/israte")->to<mrs_real>() / getControl("mrs_natural/inSamples")->to<mrs_natural>()
00050             );
00051 
00052   mrs_string inObsNames = ctrl_inObsNames_->to<mrs_string>();
00053   ctrl_onObsNames_->setValue(obsNamesAddPrefix(inObsNames, "AbsMax_"), NOUPDATE);
00054 }
00055 
00056 void
00057 AbsMax::myProcess(realvec& in, realvec& out)
00058 {
00059   mrs_natural o,t;
00060   for (o=0; o < inObservations_; ++o)
00061   {
00062     max_ = 0.0;
00063     for (t=0; t < inSamples_; ++t)
00064     {
00065       if (fabs(in(o,t)) > max_)
00066       {
00067         max_ = fabs(in(o,t));
00068       }
00069     }
00070     out(o,0) = max_;
00071   }
00072 }