Window.h

/*                                                         
** Copyright (C) 2008, 2009 Ricard Marxer <email@ricardmarxer.com>
**                                                                  
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or   
** (at your option) any later version.                                 
**                                                                     
** This program is distributed in the hope that it will be useful,     
** but WITHOUT ANY WARRANTY; without even the implied warranty of      
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the       
** GNU General Public License for more details.                        
**                                                                     
** You should have received a copy of the GNU General Public License   
** along with this program; if not, write to the Free Software         
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/                                                                          

#ifndef WINDOW_H
#define WINDOW_H

#include "Typedefs.h"
#include "Debug.h"

class Window{
public:
  enum WindowType {
    RECTANGULAR         = 0 ,
    HANN                = 1 ,
    HANNING             = 2 ,
    HAMMING             = 3 ,
    COSINE              = 4 ,
    BLACKMAN            = 5 ,
    BLACKMANHARRIS      = 6 ,
    NUTTALL             = 7 ,
    BLACKMANNUTTALL     = 8 ,
    CUSTOM              = 9 
  };

protected:
  int _inputSize;
  WindowType _windowType;
  MatrixXR _window;
  
  MatrixXR hann(int length);
  MatrixXR hamming(int length);
  MatrixXR cosine(int length);

  MatrixXR blackmanType(int length, Real a0, Real a1, Real a2, Real a3);
  MatrixXR blackman(int length);
  MatrixXR nuttall(int length);
  MatrixXR blackmanHarris(int length);
  MatrixXR blackmanNuttall(int length);

  template<typename FrameMatrixType, typename WindowedMatrixType>
  void process(const FrameMatrixType& frames, WindowedMatrixType* windowedFrames);
 
public: 
  Window(int inputSize = 1024, WindowType windowType = RECTANGULAR);

  ~Window();

  void setup();
  void reset();

  void process(const MatrixXC& frames, MatrixXC* windowedFrames);
  void process(const MatrixXR& frames, MatrixXR* windowedFrames);
  void process(const MatrixXR& frames, MatrixXC* windowedFrames);

  int inputSize() const;
  
  void setInputSize( int size, bool callSetup = true );
  
  WindowType windowType() const;
  
  void setWindowType( WindowType type, bool callSetup = true );

  const MatrixXR& window() const;

  void setWindow( const MatrixXR& window, bool callSetup = true );
};

#endif  /* WINDOW_H */

---