/***************************************************************************
 *   Copyright (C) 2005 - 2007 by                                          *
 *      Last.fm Ltd <mir@last.fm>                                          *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 *                                                                         *
 *   Part of this code is based on the work of Y. Ke, D. Hoiem, and        *
 *   R. Sukthankar - "Computer Vision for Music Identification",           *
 *   in Proceedings of Computer Vision and Pattern Recognition, 2005.      *
 *   See also http://www.cs.cmu.edu/~yke/musicretrieval/                   *
 ***************************************************************************/

#ifndef __OPT_FFT_H
#define __OPT_FFT_H

#include <fftw3.h>
#include <vector>

namespace fingerprint
{

class OptFFT
{
public:

   OptFFT(const size_t maxDataSize);
   ~OptFFT();

   int 
   process(float* pInData, const size_t dataSize);
   
   float** 
   getFrames()    { return m_pFrames; }

private:

   void applyHann(float* pInData, const size_t dataSize);

	fftwf_plan        m_p;
	fftwf_complex *   m_pOut;
	float*            m_pIn;

   //float   m_base;

   int     m_numSamples;
   int     m_numOutSamples;

   float** m_pFrames;
   int     m_maxFrames;

   std::vector<int> m_powTable;

};

} // end of namespace

#endif // OPT_FFT
/***************************************************************************
 *   Copyright (C) 2005 - 2007 by                                          *
 *      Last.fm Ltd <mir@last.fm>                                          *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 *                                                                         *
 *   Part of this code is based on the work of Y. Ke, D. Hoiem, and        *
 *   R. Sukthankar - "Computer Vision for Music Identification",           *
 *   in Proceedings of Computer Vision and Pattern Recognition, 2005.      *
 *   See also http://www.cs.cmu.edu/~yke/musicretrieval/                   *
 ***************************************************************************/

#ifndef __OPT_FFT_H
#define __OPT_FFT_H

#include <fftw3.h>
#include <vector>

namespace fingerprint
{

class OptFFT
{
public:

   OptFFT(const size_t maxDataSize);
   ~OptFFT();

   int 
   process(float* pInData, const size_t dataSize);
   
   float** 
   getFrames()    { return m_pFrames; }

private:

   void applyHann(float* pInData, const size_t dataSize);

	fftwf_plan        m_p;
	fftwf_complex *   m_pOut;
	float*            m_pIn;

   //float   m_base;

   int     m_numSamples;
   int     m_numOutSamples;

   float** m_pFrames;
   int     m_maxFrames;

   std::vector<int> m_powTable;

};

} // end of namespace

#endif // OPT_FFT
