/* -*- c++ -*- */

/*

 * Copyright 2004,2007,2008 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio 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, or (at your option)

 * any later version.

 * 

 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifndef INCLUDED_GR_FFT_VCC_FFTW_H

#define INCLUDED_GR_FFT_VCC_FFTW_H

#include <gr_core_api.h>

#include <gr_fft_vcc.h>

class gri_fft_complex;

GR_CORE_API gr_fft_vcc_sptr

gr_make_fft_vcc_fftw (int fft_size, bool forward, const std::vector<float> &window, bool shift=false);

/*!

 * \brief Compute forward or reverse FFT.  complex vector in / complex vector out.

 * \ingroup dft_blk

 *

 * Concrete class that uses FFTW.

 */

class GR_CORE_API gr_fft_vcc_fftw : public gr_fft_vcc

{

  friend GR_CORE_API gr_fft_vcc_sptr

  gr_make_fft_vcc_fftw (int fft_size, bool forward, const std::vector<float> &window, bool shift);

  gri_fft_complex *d_fft;

  gr_fft_vcc_fftw (int fft_size, bool forward, const std::vector<float> &window, bool shift);

 public:

  ~gr_fft_vcc_fftw ();

  int work (int noutput_items,

            gr_vector_const_void_star &input_items,

            gr_vector_void_star &output_items);

};

#endif /* INCLUDED_GR_FFT_VCC_FFTW_H */