CLAM-Development  1.4.0
SMSTranspose.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 "SMSTranspose.hxx"
23 #include <CLAM/ProcessingFactory.hxx>
24 #include <cmath>
25 
26 namespace CLAM
27 {
28 namespace Hidden
29 {
30  static const char * metadata[] = {
31  "key", "SMSTranspose",
32  "category", "SMS Transformations",
33  "description", "SMSTranspose",
34  0
35  };
36  static FactoryRegistrator<ProcessingFactory, SMSTranspose> reg = metadata;
37 }
38 
40 {
41  static const TData toneFactor = std::pow(2.,1./12.);
42 
43  //TODO big cludge for streaming
44  if ( !mConfig.GetPreserveOuts() ) out = in;
45 
46  DataArray& ifreqArray=in.GetFreqBuffer();
47  DataArray& ofreqArray=out.GetFreqBuffer();
48  TSize nPeaks=in.GetnPeaks();
49  TData amount=mControl.GetLastValue();
50  for(int i=0;i<nPeaks;i++)
51  ofreqArray[i]=ifreqArray[i]*std::pow(toneFactor,amount);
52  return true;
53 }
54 
55 
56 }
57