CLAM-Development  1.4.0
3BandSpectralAM.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 
22 #include "3BandSpectralAM.hxx"
23 #include "ProcessingFactory.hxx"
24 
25 namespace CLAM
26 {
27 namespace Hidden
28 {
29  static const char * metadata[] = {
30  "key", "ThreeBandAM",
31  "category", "Spectral Transformations",
32  "description", "ThreeBandAM",
33  0
34  };
35  static FactoryRegistrator<ProcessingFactory, ThreeBandAM> reg = metadata;
36 }
37 
38 
39 bool ThreeBandAM::Do(const Spectrum& in, Spectrum& out)
40 {
41  if ( !mConfig.GetPreserveOuts() )
42  {
43  out = in; //TODO big cludge for streaming
44  }
45 
46  int spectrumSize = in.GetSize();
47 
48  TData spectralResolution = spectrumSize/in.GetSpectralRange();
49 
50  SendFloatToInControl(mLFOscillator,"Pitch",mLowPitchCtl.GetLastValue());
51  SendFloatToInControl(mMFOscillator,"Pitch",mMidPitchCtl.GetLastValue());
52  SendFloatToInControl(mHFOscillator,"Pitch",mHighPitchCtl.GetLastValue());
53 
54  SendFloatToInControl(mLFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
55  SendFloatToInControl(mMFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
56  SendFloatToInControl(mHFOscillator,"Amplitude",mModAmplitudeCtl.GetLastValue());
57 
58  //kludge: this is not taking into account the possible overlap between windows!!
59  SendFloatToInControl(mLFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
60  SendFloatToInControl(mMFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
61  SendFloatToInControl(mHFOscillator,"SamplesBetweenCalls",(spectrumSize-1)/2);
62 
63 
64  DataArray& oMag = out.GetMagBuffer();
65 
66  int lowCutoff = Round(mLowCutoffFreqCtl.GetLastValue()* spectralResolution);
67  int highCutoff = Round(mHighCutoffFreqCtl.GetLastValue()* spectralResolution);
68 
69  TData modFactorLF,modFactorMF, modFactorHF;
70  mLFOscillator.Do(modFactorLF);
71  mMFOscillator.Do(modFactorMF);
72  mHFOscillator.Do(modFactorHF);
73 
74  TData currentGain = 1+modFactorLF;
75  for(int i = 0; i<spectrumSize; i++)
76  {
77  if(i>highCutoff)
78  currentGain = (1+modFactorHF);
79  else if(i>lowCutoff)
80  currentGain = (1+modFactorMF);
81  oMag[i] *= currentGain;
82  }
83  return true;
84 }
85 
86 
87 }
88