Marsyas
0.6.0-alpha
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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 #include "../common_source.h" 00020 #include "NormalizeAbs.h" 00021 00022 using std::ostringstream; 00023 using namespace Marsyas; 00024 00025 NormalizeAbs::NormalizeAbs(mrs_string name) : MarSystem("NormalizeAbs", name) 00026 { 00028 addControls(); 00029 } 00030 00031 NormalizeAbs::NormalizeAbs(const NormalizeAbs& a) : MarSystem(a) 00032 { 00035 ctrl_target_ = getctrl("mrs_real/target"); 00036 } 00037 00038 00039 NormalizeAbs::~NormalizeAbs() 00040 { 00041 } 00042 00043 MarSystem* 00044 NormalizeAbs::clone() const 00045 { 00046 return new NormalizeAbs(*this); 00047 } 00048 00049 void 00050 NormalizeAbs::addControls() 00051 { 00053 00054 addctrl("mrs_real/target", 1.0, ctrl_target_); 00055 00056 } 00057 00058 void 00059 NormalizeAbs::myUpdate(MarControlPtr sender) 00060 { 00061 MRSDIAG("NormalizeAbs.cpp - NormalizeAbs:myUpdate"); 00062 00064 MarSystem::myUpdate(sender); 00065 } 00066 00067 void 00068 NormalizeAbs::myProcess(realvec& in, realvec& out) 00069 { 00070 mrs_natural t,o; 00071 const mrs_real& target = ctrl_target_->to<mrs_real>(); 00072 00074 for (o = 0; o < inObservations_; o++) 00075 { 00076 // find maximum value 00077 mrs_real max_val = 0.0; 00078 for (t = 0; t < inSamples_; t++) 00079 if (max_val < fabs(in(o,t))) 00080 max_val = fabs(in(o,t)); 00081 mrs_real gain = 0.0; 00082 if (max_val > 0) 00083 gain = target / max_val; 00084 for (t = 0; t < inSamples_; t++) 00085 out(o, t) = gain * in(o, t); 00086 } 00087 }