3BandSpectralAM.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 "3BandSpectralAM.hxx"
00023 #include "ProcessingFactory.hxx"
00024 
00025 namespace CLAM
00026 {
00027 namespace Hidden
00028 {
00029         static const char * metadata[] = {
00030                 "key", "ThreeBandAM",
00031                 "category", "Spectral Transformations",
00032                 "description", "ThreeBandAM",
00033                 0
00034         };
00035         static FactoryRegistrator<ProcessingFactory, ThreeBandAM> reg = metadata;
00036 }
00037 
00038 
00039 bool ThreeBandAM::Do(const Spectrum& in, Spectrum& out)
00040 {
00041         if ( !mConfig.GetPreserveOuts() )
00042         {
00043                 out = in; //TODO big cludge for streaming
00044         }
00045         
00046         int spectrumSize = in.GetSize();
00047         
00048         TData spectralResolution = spectrumSize/in.GetSpectralRange();
00049         
00050         SendFloatToInControl(mLFOscillator,"Pitch",mLowPitchCtl.GetLastValue());
00051         SendFloatToInControl(mMFOscillator,"Pitch",mMidPitchCtl.GetLastValue());
00052         SendFloatToInControl(mHFOscillator,"Pitch",mHighPitchCtl.GetLastValue());
00053         
00054         SendFloatToInControl(mLFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
00055         SendFloatToInControl(mMFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
00056         SendFloatToInControl(mHFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
00057 
00058         //kludge: this is not taking into account the possible overlap between windows!!
00059         SendFloatToInControl(mLFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
00060         SendFloatToInControl(mMFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
00061         SendFloatToInControl(mHFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
00062         
00063         
00064         DataArray& oMag = out.GetMagBuffer();
00065         
00066         int lowCutoff = Round(mLowCutoffFreqCtl.GetLastValue()* spectralResolution);
00067         int highCutoff =        Round(mHighCutoffFreqCtl.GetLastValue()* spectralResolution);
00068 
00069         TData modFactorLF,modFactorMF, modFactorHF;
00070         mLFOscillator.Do(modFactorLF);
00071         mMFOscillator.Do(modFactorMF);
00072         mHFOscillator.Do(modFactorHF);
00073         
00074         TData currentGain = 1+modFactorLF;
00075         for(int i = 0; i<spectrumSize; i++)
00076         {
00077                 if(i>highCutoff) 
00078                         currentGain = (1+modFactorHF);
00079                 else if(i>lowCutoff) 
00080                         currentGain = (1+modFactorMF);
00081                 oMag[i] *= currentGain;
00082         }
00083         return true;
00084 }
00085 
00086 
00087 }
00088 
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