DCT.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 DCT_H
#define DCT_H

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

class DCT {
public:
  enum DCTType {
    I = 0 ,
    II = 1 ,
    III = 2 ,
    IV = 3 ,
    OCTAVE = 4 
  };

protected:
  // Internal parameters
  int _inputSize;
  int _dctSize;
  Real _scale;

  DCTType _dctType;

  // Internal variables
  MatrixXR _dctMatrix;

  void type1Matrix(MatrixXR* dctMatrix);

  void type2Matrix(MatrixXR* dctMatrix);

  void typeOctaveMatrix(MatrixXR* dctMatrix);

public:
  DCT(int inputSize = 1024, int dctSize = 1024, bool scale = false, DCTType dctType = OCTAVE);
  
  ~DCT();

  void reset();
  void setup();

  void process(const MatrixXR& frames, MatrixXR* dct);

  DCTType dctType() const;

  void setDctType( DCTType type, bool callSetup = true );

  int inputSize() const;  

  void setInputSize( int size, bool callSetup = true );

  int dctSize() const;

  void setDctSize( int size, bool callSetup = true );
};

#endif  /* DCT_H */

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