Marsyas
0.6.0-alpha
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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 "Peak2Rms.h" 00020 00021 using std::ostringstream; 00022 using namespace Marsyas; 00023 00024 Peak2Rms::Peak2Rms(mrs_string name):MarSystem("Peak2Rms", name) 00025 { 00026 } 00027 00028 Peak2Rms::Peak2Rms(const Peak2Rms& a) : MarSystem(a) 00029 { 00030 } 00031 00032 Peak2Rms::~Peak2Rms() 00033 { 00034 } 00035 00036 MarSystem* 00037 Peak2Rms::clone() const 00038 { 00039 return new Peak2Rms(*this); 00040 } 00041 00042 void 00043 Peak2Rms::myUpdate(MarControlPtr sender) 00044 { 00045 (void) sender; //suppress warning of unused parameter(s) 00046 setctrl("mrs_natural/onObservations",1); 00047 setctrl("mrs_natural/onSamples",1); 00048 setctrl("mrs_real/osRate", israte_ / inSamples_); 00049 } 00050 00051 void 00052 Peak2Rms::myProcess(realvec& in, realvec& out) 00053 { 00054 mrs_real peak = in.maxval(); 00055 mrs_real rms = 0.0; 00056 mrs_natural t; 00057 00058 for (t = 0; t < inSamples_; t++) 00059 { 00060 rms += in(0,t) * in(0,t); 00061 } 00062 rms /= inSamples_; 00063 rms = sqrt(rms); 00064 out(0) = peak/rms; 00065 }