CLAM-Development  1.4.0
SampleAndHold.hxx
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1 
2 /*
3  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
4  * UNIVERSITAT POMPEU FABRA
5  *
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  */
22 
23 
24 #ifndef _SampleAndHold_
25 #define _SampleAndHold_
26 
27 #include "InPort.hxx"
28 #include "OutPort.hxx"
29 #include "Frame.hxx"
30 #include "FrameTransformation.hxx"
32 #include "TokenDelay.hxx"
33 
34 namespace CLAM{
35 
36  class SampleAndHold: public FrameTransformationTmpl<Spectrum>
37  {
38  InPort<Spectrum> mIn;
39  OutPort<Spectrum> mOut;
40 
41  public:
42  const char* GetClassName() const
43  {
44  return "SampleAndHold";
45  }
46 
48  :
49  mIn("In Spectrum", this),
50  mOut("Out Spectrum", this)
51  {
53  }
54 
56 
57  bool Do(const Frame& in, Frame& out)
58  {
59  return Do(in.GetSpectrum(),
60  out.GetSpectrum());
61  }
62 
63  virtual bool InitControls()
64  {
65  mAmount.DoControl(500);
66 
67  mTimeElapsed = 0;
68  return true;
69  }
70 
71  bool Do(const Spectrum& in, Spectrum& out);
72 
73  bool Do()
74  {
75  bool result = Do(mIn.GetData(), mOut.GetData());
76  mIn.Consume();
77  mOut.Produce();
78  return result;
79  }
80  private:
81  Spectrum mSpectrum;
82 
83  TSize mFrameSize;
84  TData mTimeElapsed;
85  };
86 };//namespace CLAM
87 
88 #endif // _SampleAndHold_