CLAM-Development  1.4.0
WindowGenerator.hxx
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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 #ifndef _WINDOW_GENERATOR_
23 #define _WINDOW_GENERATOR_
24 
25 #include <typeinfo> // std::bad_cast
26 #include "DataTypes.hxx"
27 #include "GlobalEnums.hxx"
28 #include "Processing.hxx"
29 #include "InControl.hxx"
30 #include "Processing.hxx"
32 #include "Array.hxx"
33 #include "AudioOutPort.hxx"
34 
35 namespace CLAM {
36 
37 class Audio;
38 class Spectrum;
39 class Storage;
40 class ProcessingConfig;
41 
80  class WindowGenerator: public Processing {
81  public:
83  private:
84  Config mConfig;
85 
86  const char *GetClassName() const {return "WindowGenerator";}
87 
91  bool ConcreteConfigure(const ProcessingConfig& c);
92 
93  public:
95 
97 
98  const ProcessingConfig &GetConfig() const { return mConfig;}
99 
100  bool Do(void);
101 
102  bool Do(DataArray& output);
103  bool Do(Spectrum& output);
104  bool Do(Audio& output);
105 
106  bool MayDisableExecution() const {return true;}
107 
108  void SetSize(TSize size)
109  {
110  CLAM_DEBUG_ASSERT(size%2==1,"Window size must be odd");
111  mSize.DoControl((TControlData)size);
112  }
113 
114  protected:
116 
117  private:
118  FloatInControl mSize;
119  DataArray mTable;
120 
121  void CreateTable(DataArray& table,EWindowType windowType,long windowsize) const;
122  void CreateWindowFromTable(DataArray &window) const;
123  double BesselFunction(double x) const;
124  void KaiserBessel(long size,DataArray& window,
125  double alpha) const;
126  void BlackmanHarrisX(long size,DataArray& window,
127  double a0,double a1,double a2,double a3 = 0.) const;
128  void BlackmanHarris62(long size,DataArray& window) const;
129  void BlackmanHarris70(long size,DataArray& window) const;
130  void BlackmanHarris74(long size,DataArray& window) const;
131  void BlackmanHarris92(long size,DataArray& window) const;
132  void BlackmanHarrisLike(long size,DataArray& window) const;
133  void Hamming(long size,DataArray& window) const;
134  void Triangular(long size,DataArray& window) const;
135  void BlackmanHarris92TransMainLobe(long size,DataArray& window) const;
136  void Gaussian(long size,DataArray& window) const;
137  void Sine(long size,DataArray& window) const;
138  void Square(long size,DataArray& window) const;
139 
140  void InvertWindow(const DataArray& originalWindow,
141  DataArray& invertedWindow) const;
142  void InvertWindow(DataArray& window) const;
143  void NormalizeWindow(DataArray& window) const;
144  double Sinc(double x, short N) const;
145 
146  };
147 
148 };//namespace CLAM
149 
150 #endif //_WINDOW_GENERATOR_
151