SpectralReverse.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 "SpectralReverse.hxx"
00023 #include "ProcessingFactory.hxx"
00024 
00025 namespace CLAM
00026 {
00027 
00028 namespace Hidden
00029 {
00030         static const char * metadata[] = {
00031                 "key", "SpectralReverse",
00032         //      "category", "Spectral Transformations",
00033         //      "description", "SpectralReverse",
00034                 0
00035         };
00036         static FactoryRegistrator<ProcessingFactory, SpectralReverse> reg = metadata;
00037 }
00038 
00039 bool SpectralReverse::Do(const Spectrum& in, Spectrum& out)
00040 {
00041         if (!mConfig.GetPreserveOuts())
00042         {
00043                 out = in; //TODO big cludge for streaming
00044         }
00045         DataArray& inPhase = in.GetPhaseBuffer();
00046         DataArray& inMag = in.GetMagBuffer();
00047         
00048         int spectrumSize = in.GetSize();
00049         
00050         TData spectralResolution = spectrumSize/in.GetSpectralRange();
00051         
00052         int mirrorPoint = Round(mAmount.GetLastValue()* spectralResolution);
00053                 
00054         mMag.Resize(spectrumSize);
00055         mMag.SetSize(spectrumSize);
00056         mPhase.Resize(spectrumSize);
00057         mPhase.SetSize(spectrumSize);
00058         int i;
00059         for(i = 0; i<mirrorPoint; i++)
00060         {
00061                 mMag[i] = inMag[mirrorPoint-i];
00062                 mPhase[i] = inPhase[mirrorPoint-i];
00063         }
00064         for(i = mirrorPoint; i<spectrumSize; i++)
00065         {
00066                 mMag[i] = inMag[spectrumSize-i+mirrorPoint];
00067                 mPhase[i] = inPhase[spectrumSize-i+mirrorPoint];
00068         }
00069         out.SetMagBuffer(mMag);
00070         out.SetPhaseBuffer(mPhase);
00071         return true;
00072 }
00073 
00074 
00075 }
00076 
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