/* -*- c++ -*- */
/*
 * Copyright 2004 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 2, 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
#ifndef INCLUDED_OFDM_TX_CC_H
#define INCLUDED_OFDM_TX_CC_H

#include <gr_block.h>

class gri_fft_complex;

class ofdm_tx_cc;

/*
 * We use boost::shared_ptr's instead of raw pointers for all access
 * to gr_blocks (and many other data structures).  The shared_ptr gets
 * us transparent reference counting, which greatly simplifies storage
 * management issues.  This is especially helpful in our hybrid
 * C++ / Python system.
 *
 * See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
 *
 * As a convention, the _sptr suffix indicates a boost::shared_ptr
 */
typedef boost::shared_ptr<ofdm_tx_cc> ofdm_tx_cc_sptr;

/*!
 * \brief Return a shared_ptr to a new instance of howto_square2_ff.
 *
 * To avoid accidental use of raw pointers, howto_square2_ff's
 * constructor is private.  howto_make_square2_ff is the public
 * interface for creating new instances.
 */
ofdm_tx_cc_sptr ofdm_do_tx_cc ();

/*!
 * \brief OFDM transmitter.
 * \ingroup block
 *
 * A simple OFDM transmitter block.
 */
class ofdm_tx_cc : public gr_block
{
private:
  // The friend declaration allows ofdm_do_tx_cc to
  // access the private constructor.

  friend ofdm_tx_cc_sptr ofdm_do_tx_cc (int ofdm_sym_len, int gi_len, int fft_len);

  ofdm_tx_cc (int ofdm_sym_len, int gi_len, int fft_len);  	// private constructor

  unsigned int d_ofdm_sym_len;
  unsigned int d_gi_len;
  unsigned int d_fft_len;
  gri_fft_complex *d_fft;

 public:
  ~ofdm_tx_cc ();	// public destructor

  // Where all the action really happens

  int general_work (int noutput_items,
	    gr_vector_int &ninput_items,
	    gr_vector_const_void_star &input_items,
	    gr_vector_void_star &output_items);

  void forecast(int noutput_items, gr_vector_int &ninput_items_required);

};

#endif /* INCLUDED_OFDM_TX_H */