CLAM-Development
1.1
|
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 "OscillatingSpectralNotch.hxx" 00023 #include "ProcessingFactory.hxx" 00024 00025 namespace CLAM 00026 { 00027 namespace Hidden 00028 { 00029 static const char * metadata[] = { 00030 "key", "OscillatingSpectralNotch", 00031 "category", "Spectral Transformations", 00032 "description", "OscillatingSpectralNotch", 00033 0 00034 }; 00035 static FactoryRegistrator<ProcessingFactory, OscillatingSpectralNotch> reg = metadata; 00036 } 00037 00038 bool OscillatingSpectralNotch::Do(const Spectrum& in, Spectrum& out) 00039 { 00040 out = in; //we need to copy input to output no matter what 00041 00042 DataArray& outMag = out.GetMagBuffer(); 00043 00044 int spectrumSize = in.GetSize(); 00045 00046 SendFloatToInControl(mOscillator,"Pitch",mOscFreqCtl.GetLastValue()); 00047 //note that oscillator depth is given in % 00048 SendFloatToInControl(mOscillator,"Amplitude",mOscWidthCtl.GetLastValue()*0.01); 00049 //kludge: this is not taking into account the possible overlap between windows!! 00050 SendFloatToInControl(mOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2); 00051 00052 TData currentOscAmp; 00053 mOscillator.Do(currentOscAmp); 00054 00055 TData spectralResolution = spectrumSize/in.GetSpectralRange(); 00056 int centerFreq= Round(mFreqCtl.GetLastValue()*spectralResolution*(1+currentOscAmp)); 00057 int band = Round(mBandwidthCtl.GetLastValue()*spectralResolution); 00058 TData gain = log2lin(mGainCtl.GetLastValue()); 00059 int n; 00060 int leftLimit = centerFreq-band; 00061 if(leftLimit<0) leftLimit = 0; 00062 int rightLimit = centerFreq+band+1; 00063 if(rightLimit>spectrumSize) rightLimit=spectrumSize; 00064 for (n=leftLimit; n<rightLimit;n++) 00065 { 00066 outMag[n] *= gain ; 00067 } 00068 return true; 00069 } 00070 00071 00072 } 00073