Marsyas  0.6.0-alpha
/usr/src/RPM/BUILD/marsyas-0.6.0/src/marsyas/marsystems/Compressor.cpp
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00001 /*
00002 ** Copyright (C) 1998-2006 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 #include <cmath>
00020 
00021 #include "Compressor.h"
00022 #include "../common_source.h"
00023 
00024 
00025 using std::ostringstream;
00026 using namespace Marsyas;
00027 
00028 Compressor::Compressor(mrs_string name):MarSystem("Compressor", name)
00029 {
00030   addControls();
00031 }
00032 
00033 Compressor::Compressor(const Compressor& a) : MarSystem(a)
00034 {
00035 }
00036 
00037 
00038 Compressor::~Compressor()
00039 {
00040 }
00041 
00042 MarSystem*
00043 Compressor::clone() const
00044 {
00045   return new Compressor(*this);
00046 }
00047 
00048 void
00049 Compressor::addControls()
00050 {
00051 
00052 }
00053 
00054 void
00055 Compressor::myUpdate(MarControlPtr sender)
00056 {
00057   MRSDIAG("Compressor.cpp - Compressor:myUpdate");
00058 
00059   MarSystem::myUpdate(sender);
00060 }
00061 
00062 void
00063 Compressor::myProcess(realvec& in, realvec& out)
00064 {
00065   mrs_natural o,t;
00066   for (o=0; o < inObservations_; o++)
00067     for (t = 0; t < inSamples_; t++) {
00068       if(in(o,t) > 0.0001)
00069         out(o,t) = 5.213 * log(1 + 10 * sqrt(in(o,t)))/12.5;
00070       else
00071         out(o,t) = 5.213 * log(1.1)/12.5;
00072 
00073       //cout << "Compressor:" << in(o,t) << "\t-->\t" << out(o,t) << endl;
00074     }
00075 }