Marsyas
0.6.0-alpha
|
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 "ZeroCrossings.h" 00020 #include "../common_source.h" 00021 00022 using namespace std; 00023 using namespace Marsyas; 00024 00025 ZeroCrossings::ZeroCrossings(mrs_string name):MarSystem("ZeroCrossings",name) 00026 { 00027 } 00028 00029 00030 ZeroCrossings::~ZeroCrossings() 00031 { 00032 } 00033 00034 00035 MarSystem* 00036 ZeroCrossings::clone() const 00037 { 00038 return new ZeroCrossings(*this); 00039 } 00040 00041 void 00042 ZeroCrossings::myUpdate(MarControlPtr sender) 00043 { 00044 (void) sender; //suppress warning of unused parameter(s) 00045 MRSDIAG("ZeroCrossings.cpp - ZeroCrossings:myUpdate"); 00046 ctrl_onSamples_->setValue((mrs_natural)1, NOUPDATE); 00047 ctrl_onObservations_->setValue(ctrl_inObservations_, NOUPDATE); 00048 ctrl_osrate_->setValue(ctrl_israte_->to<mrs_real>() / ctrl_inSamples_->to<mrs_natural>()); 00049 ctrl_onObsNames_->setValue("ZeroCrossings_" + ctrl_inObsNames_->to<mrs_string>() , NOUPDATE); 00050 } 00051 00052 00053 00054 00055 void 00056 ZeroCrossings::myProcess(realvec& in, realvec& out) 00057 { 00058 mrs_natural o,t; 00059 00060 for (o=0; o < inObservations_; o++) 00061 { 00062 zcrs_ = 1.0; 00063 for (t = 1; t < inSamples_; t++) 00064 { 00065 if (((in(o, t-1) > 0) && (in(o,t) < 0)) || 00066 ((in(o, t-1) < 0) && (in(o,t) > 0))) 00067 { 00068 zcrs_++; 00069 } 00070 } 00071 out(o,0) = zcrs_ / inSamples_; 00072 } 00073 } 00074