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 "Peakalizer.hxx" 00023 #include "ProcessingFactory.hxx" 00024 00025 namespace CLAM 00026 { 00027 00028 namespace Hidden 00029 { 00030 static const char * metadata[] = { 00031 "key", "Peakalizer", 00032 "category", "Spectral Transformations", 00033 "description", "Peakalizer", 00034 0 00035 }; 00036 static FactoryRegistrator<ProcessingFactory, Peakalizer> reg = metadata; 00037 } 00038 00039 bool Peakalizer::Do(const Spectrum& in, Spectrum& out) 00040 { 00041 if (!mConfig.GetPreserveOuts()) 00042 { 00043 out = in; //TODO big cludge for streaming 00044 } 00045 DataArray& inMag = in.GetMagBuffer(); 00046 DataArray& outMag = out.GetMagBuffer(); 00047 00048 int spectrumSize = in.GetSize(); 00049 mMag.Resize(spectrumSize); 00050 mMag.SetSize(spectrumSize); 00051 00052 //control is supposed to be in dB's 00053 TData threshold = log2lin(mThresholdCtl.GetLastValue()); 00054 00055 TData spectralResolution = spectrumSize/in.GetSpectralRange(); 00056 int bandwidth = Round(mBandWidthCtl.GetLastValue()* spectralResolution*0.5); 00057 00058 int i,n; 00059 //first we set everything to 0 (it could be done more efficiently) 00060 for(i = 0; i<spectrumSize; i++) 00061 { 00062 mMag[i] = 0.; 00063 } 00064 for(i = 0; i<spectrumSize; i++) 00065 { 00066 if(inMag[i] > threshold) 00067 { 00068 for(n = i-bandwidth; n < i+bandwidth; n++) 00069 { 00070 mMag[n] = inMag[n]; 00071 } 00072 } 00073 } 00074 out.SetMagBuffer(mMag); 00075 return true; 00076 } 00077 00078 00079 00080 } 00081