CLAM-Development  1.4.0
SMSOddEvenHarmonicRatio.cxx
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1 /*
2  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
3  * UNIVERSITAT POMPEU FABRA
4  *
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
23 #include "ProcessingFactory.hxx"
24 
25 
26 
27 namespace CLAM
28 {
29 
30 namespace Hidden
31 {
32  static const char * metadata[] = {
33  "key", "SMSOddEvenHarmonicRatio",
34  "category", "SMS Transformations",
35  "description", "SMSOddEvenHarmonicRatio",
36  0
37  };
38  static FactoryRegistrator<ProcessingFactory, SMSOddEvenHarmonicRatio> reg = metadata;
39 }
40 
41 
43 {
44  out = in; // TODO big cludge for streaming refactoring
45  DataArray& iMagArray=in.GetMagBuffer();
46  DataArray& oMagArray=out.GetMagBuffer();
47  TSize nPeaks=in.GetnPeaks();
48  TData oddFactor=mOddFactor.GetLastValue()*0.5;
49  TData evenFactor=-oddFactor;
50 
51  for(int i=0;i<nPeaks-1;i+=2)
52  {
53  oMagArray[i]=std::min(iMagArray[i]+oddFactor,TData(0));
54  oMagArray[i+1]=std::min(iMagArray[i+1]+evenFactor,TData(0));
55  }
56  return true;
57 }
58 
59 }
60