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 "3BandGate.hxx" 00023 #include "ProcessingFactory.hxx" 00024 00025 namespace CLAM 00026 { 00027 00028 namespace Hidden 00029 { 00030 static const char * metadata[] = { 00031 "key", "ThreeBandGate", 00032 // "category", "Spectral Transformations", 00033 // "description", "ThreeBandGate", 00034 0 00035 }; 00036 static FactoryRegistrator<ProcessingFactory, ThreeBandGate> reg = metadata; 00037 } 00038 00039 00040 bool ThreeBandGate::Do(const Spectrum& in, Spectrum& out) 00041 { 00042 out = in; //even if out needs to be preserved, we need to copy content 00043 00044 DataArray& oMag = out.GetMagBuffer(); 00045 DataArray& iMag = in.GetMagBuffer(); 00046 00047 int spectrumSize = in.GetSize(); 00048 00049 TData spectralResolution = spectrumSize/in.GetSpectralRange(); 00050 00051 int lowCutoff = Round(mLowCutoffFreqCtl.GetLastValue()* spectralResolution); 00052 int highCutoff = Round(mHighCutoffFreqCtl.GetLastValue()* spectralResolution); 00053 00054 //note: control is supposed to be sent as dB's 00055 TData lowThreshold = log2lin(mLowThresholdCtl.GetLastValue()); 00056 TData midThreshold = log2lin(mMidThresholdCtl.GetLastValue()); 00057 TData highThreshold = log2lin(mHighThresholdCtl.GetLastValue()); 00058 00059 int i; 00060 TData currentThreshold = lowThreshold; 00061 for( i = 0; i<lowCutoff; i++) 00062 { 00063 if(iMag[i]<lowThreshold) 00064 oMag[i] = 0; 00065 } 00066 for( i = lowCutoff; i<highCutoff; i++) 00067 { 00068 if(iMag[i]<midThreshold) 00069 oMag[i] = 0; 00070 } 00071 for( i = highCutoff; i<spectrumSize; i++) 00072 { 00073 if(iMag[i]<highThreshold) 00074 oMag[i] = 0; 00075 } 00076 return true; 00077 } 00078 00079 00080 00081 } 00082