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

/*

 * Copyright 2007 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_OFDM_SAMPLER_H

#define INCLUDED_GR_OFDM_SAMPLER_H

#include <gr_sync_block.h>

class gr_ofdm_sampler;

typedef boost::shared_ptr<gr_ofdm_sampler> gr_ofdm_sampler_sptr;

gr_ofdm_sampler_sptr gr_make_ofdm_sampler (unsigned int fft_length, 

                                           unsigned int symbol_length,

                                           unsigned int timeout=1000);

/*!

 * \brief does the rest of the OFDM stuff

 * \ingroup ofdm_blk

 */

class gr_ofdm_sampler : public gr_block

{

  friend gr_ofdm_sampler_sptr gr_make_ofdm_sampler (unsigned int fft_length, 

                                                    unsigned int symbol_length,

                                                    unsigned int timeout);

  gr_ofdm_sampler (unsigned int fft_length, 

                   unsigned int symbol_length,

                   unsigned int timeout);

 private:

  enum state_t {STATE_NO_SIG, STATE_PREAMBLE, STATE_FRAME};

  state_t d_state;

  unsigned int d_timeout_max;

  unsigned int d_timeout;

  unsigned int d_fft_length;

  unsigned int d_symbol_length;

 public:

  void forecast (int noutput_items, gr_vector_int &ninput_items_required);

  int general_work (int noutput_items,

                    gr_vector_int &ninput_items,

                    gr_vector_const_void_star &input_items,

                    gr_vector_void_star &output_items);

};

#endif