CLAM-Development  1.4.0
SpectralAverage.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 
22 #include "SpectralAverage.hxx"
23 #include "ProcessingFactory.hxx"
24 
25 namespace CLAM
26 {
27 namespace Hidden
28 {
29  static const char * metadata[] = {
30  "key", "SpectralAverage",
31  // "category", "Spectral Transformations",
32  // "description", "SpectralAverage",
33  0
34  };
35  static FactoryRegistrator<ProcessingFactory, SpectralAverage> reg = metadata;
36 }
37 
38 bool SpectralAverage::Do(const Spectrum& in, Spectrum& out)
39 {
40  if (!mConfig.GetPreserveOuts())
41  {
42  out = in; //TODO big cludge for streaming
43  }
44  DataArray& inMag = in.GetMagBuffer();
45 
46  int spectrumSize = in.GetSize();
47 
48  int nPointsToAverage = int(mPoints.GetLastValue());
49  int nPointsToAverageHalf = int(mPoints.GetLastValue()* 0.5);
50  TData oneOverNPointsToAverage = 1./nPointsToAverage;
51 
52  mMag.Resize(spectrumSize);
53  mMag.SetSize(spectrumSize);
54  int i, z;
55  TData average;
56  for(i = nPointsToAverageHalf; i<spectrumSize-nPointsToAverageHalf; i++)
57  {
58  for(z=i-nPointsToAverageHalf; z<i+nPointsToAverageHalf; z++)
59  {
60  average+=inMag[z];
61  }
62  mMag[i] = average*oneOverNPointsToAverage;
63  average = 0;
64  }
65  out.SetMagBuffer(mMag);
66  return true;
67 }
68 
69 
70 }
71