/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2011 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_TRELLIS_CONSTELLATION_METRICS_CF_H
#define INCLUDED_TRELLIS_CONSTELLATION_METRICS_CF_H

#include <trellis_api.h>
#include <gr_block.h>
#include <digital_constellation.h>
#include <digital_metric_type.h>

class trellis_constellation_metrics_cf;
typedef boost::shared_ptr<trellis_constellation_metrics_cf> trellis_constellation_metrics_cf_sptr;

TRELLIS_API trellis_constellation_metrics_cf_sptr trellis_make_constellation_metrics_cf (digital_constellation_sptr constellation, trellis_metric_type_t TYPE);

/*!
 * \brief Evaluate metrics for use by the Viterbi algorithm.
 * \ingroup coding_blk
 */
class TRELLIS_API trellis_constellation_metrics_cf : public gr_block
{
 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);
 protected:
  trellis_constellation_metrics_cf (digital_constellation_sptr constellation, trellis_metric_type_t TYPE);

 private:
  digital_constellation_sptr d_constellation;
  trellis_metric_type_t d_TYPE;
  unsigned int d_O;
  unsigned int d_D;
  friend TRELLIS_API trellis_constellation_metrics_cf_sptr trellis_make_constellation_metrics_cf (digital_constellation_sptr constellation, trellis_metric_type_t TYPE);

};


#endif