CLAM-Development
1.1
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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