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

/*

 * Copyright 2006 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_ATSC_BIT_TIMING_LOOP_H

#define INCLUDED_ATSC_BIT_TIMING_LOOP_H

#include <cstdio>

#include <gr_block.h>

#include <atsci_diag_output.h>

#include <atsci_sssr.h>

#include <atsci_syminfo.h>

class atsc_bit_timing_loop;

typedef boost::shared_ptr<atsc_bit_timing_loop> atsc_bit_timing_loop_sptr;

atsc_bit_timing_loop_sptr atsc_make_bit_timing_loop();

/*!

 * \brief ATSC BitTimingLoop3

 * \ingroup atsc

 *

 * This class accepts a single real input and produces two outputs,

 *  the raw symbol (float) and the tag (atsc_syminfo)

 */

class atsc_bit_timing_loop : public gr_block

{

  friend atsc_bit_timing_loop_sptr atsc_make_bit_timing_loop();

  atsc_bit_timing_loop();

public:

  int work (int noutput_items,

            gr_vector_const_void_star &input_items,

            gr_vector_void_star &output_items);

  void reset() { /* nop */ }

  ~atsc_bit_timing_loop () { };

  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);

  // debug (NOPs)

  void set_mu (double a_mu) {  }

  void set_no_update (bool a_no_update) {  }

  void set_loop_filter_tap (double tap)  { }

  void set_timing_rate (double rate)     { }

 protected:

  atsci_sssr                    d_sssr;

  atsci_interpolator            d_interp;

  unsigned long long            d_next_input;

  double                        d_rx_clock_to_symbol_freq;

  int                                d_si;

};

#endif /* INCLUDED_ATSC_BIT_TIMING_LOOP_H */