SpectralAverage.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 "SpectralAverage.hxx"
00023 #include "ProcessingFactory.hxx"
00024 
00025 namespace CLAM
00026 {
00027 namespace Hidden
00028 {
00029         static const char * metadata[] = {
00030                 "key", "SpectralAverage",
00031         //      "category", "Spectral Transformations",
00032         //      "description", "SpectralAverage",
00033                 0
00034         };
00035         static FactoryRegistrator<ProcessingFactory, SpectralAverage> reg = metadata;
00036 }
00037 
00038 bool SpectralAverage::Do(const Spectrum& in, Spectrum& out)
00039 {
00040         if (!mConfig.GetPreserveOuts())
00041         {
00042                 out = in; //TODO big cludge for streaming
00043         }
00044         DataArray& inMag = in.GetMagBuffer();
00045         
00046         int spectrumSize = in.GetSize();
00047         
00048         int nPointsToAverage = int(mPoints.GetLastValue());
00049         int nPointsToAverageHalf = int(mPoints.GetLastValue()* 0.5);
00050         TData oneOverNPointsToAverage = 1./nPointsToAverage;
00051                 
00052         mMag.Resize(spectrumSize);
00053         mMag.SetSize(spectrumSize);
00054         int i, z;
00055         TData average;
00056         for(i = nPointsToAverageHalf; i<spectrumSize-nPointsToAverageHalf; i++)
00057         {
00058                 for(z=i-nPointsToAverageHalf; z<i+nPointsToAverageHalf; z++)
00059                 {
00060                         average+=inMag[z];
00061                 }
00062                 mMag[i] = average*oneOverNPointsToAverage;
00063                 average = 0;
00064         }
00065         out.SetMagBuffer(mMag);
00066         return true;
00067 }
00068 
00069 
00070 }
00071 
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