/*
   Copyright 2005-2009 Last.fm Ltd. <mir@last.fm>

   This file is part of liblastfm.

   liblastfm 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 3 of the License, or
   (at your option) any later version.

   liblastfm 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 liblastfm.  If not, see <http://www.gnu.org/licenses/>.
*/
#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