SMSOddEvenHarmonicRatio.cxx

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00001 /*
00002  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
00003  *                         UNIVERSITAT POMPEU FABRA
00004  *
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  *
00020  */
00021 
00022 #include "SMSOddEvenHarmonicRatio.hxx"
00023 #include "ProcessingFactory.hxx"
00024 
00025 
00026 
00027 namespace CLAM
00028 {
00029 
00030 namespace Hidden
00031 {
00032         static const char * metadata[] = {
00033                 "key", "SMSOddEvenHarmonicRatio",
00034                 "category", "SMS Transformations",
00035                 "description", "SMSOddEvenHarmonicRatio",
00036                 0
00037         };
00038         static FactoryRegistrator<ProcessingFactory, SMSOddEvenHarmonicRatio> reg = metadata;
00039 }
00040 
00041 
00042 bool SMSOddEvenHarmonicRatio::Do(const SpectralPeakArray& in, SpectralPeakArray& out)
00043 {
00044         out = in; // TODO big cludge for streaming refactoring
00045         DataArray& iMagArray=in.GetMagBuffer();
00046         DataArray& oMagArray=out.GetMagBuffer();
00047         TSize nPeaks=in.GetnPeaks();
00048         TData oddFactor=mOddFactor.GetLastValue()*0.5;
00049         TData evenFactor=-oddFactor;
00050 
00051         for(int i=0;i<nPeaks-1;i+=2)
00052         {
00053                 oMagArray[i]=std::min(iMagArray[i]+oddFactor,TData(0));
00054                 oMagArray[i+1]=std::min(iMagArray[i+1]+evenFactor,TData(0));
00055         }
00056         return true;
00057 }
00058 
00059 }
00060 
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