CLAM-Development  1.4.0
OscillatingSpectralNotch.cxx
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1 /*
2  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
3  * UNIVERSITAT POMPEU FABRA
4  *
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
23 #include "ProcessingFactory.hxx"
24 
25 namespace CLAM
26 {
27 namespace Hidden
28 {
29  static const char * metadata[] = {
30  "key", "OscillatingSpectralNotch",
31  "category", "Spectral Transformations",
32  "description", "OscillatingSpectralNotch",
33  0
34  };
35  static FactoryRegistrator<ProcessingFactory, OscillatingSpectralNotch> reg = metadata;
36 }
37 
39 {
40  out = in; //we need to copy input to output no matter what
41 
42  DataArray& outMag = out.GetMagBuffer();
43 
44  int spectrumSize = in.GetSize();
45 
46  SendFloatToInControl(mOscillator,"Pitch",mOscFreqCtl.GetLastValue());
47  //note that oscillator depth is given in %
48  SendFloatToInControl(mOscillator,"Amplitude",mOscWidthCtl.GetLastValue()*0.01);
49  //kludge: this is not taking into account the possible overlap between windows!!
50  SendFloatToInControl(mOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
51 
52  TData currentOscAmp;
53  mOscillator.Do(currentOscAmp);
54 
55  TData spectralResolution = spectrumSize/in.GetSpectralRange();
56  int centerFreq= Round(mFreqCtl.GetLastValue()*spectralResolution*(1+currentOscAmp));
57  int band = Round(mBandwidthCtl.GetLastValue()*spectralResolution);
58  TData gain = log2lin(mGainCtl.GetLastValue());
59  int leftLimit = centerFreq-band;
60  if(leftLimit<0) leftLimit = 0;
61  int rightLimit = centerFreq+band+1;
62  if(rightLimit>spectrumSize) rightLimit=spectrumSize;
63  for (int n=leftLimit; n<rightLimit;n++)
64  {
65  outMag[n] *= gain ;
66  }
67  return true;
68 }
69 
70 
71 }
72