text: /* -*- c++ -*- */
  /*
   * Copyright 2002 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 _ATSC_VITERBI_DECODER_H_
  #define _ATSC_VITERBI_DECODER_H_
  
  #define	USE_SIMPLE_SLICER  0
  
  #include <gnuradio/atsc/api.h>
  #include <gnuradio/atsc/types.h>
  #include <gnuradio/atsc/interleaver_fifo.h>
  
  #if (USE_SIMPLE_SLICER)
  #include <gnuradio/atsc/fake_single_viterbi_impl.h>
  typedef atsci_fake_single_viterbi	single_viterbi_t;
  #else
  #include <gnuradio/atsc/single_viterbi_impl.h>
  typedef atsci_single_viterbi		single_viterbi_t;
  #endif
  
  /*!
   * \brief fancy, schmancy 12-way interleaved viterbi decoder for ATSC
   */
  
  class ATSC_API atsci_viterbi_decoder {
  public:
    static const int	NCODERS = 12;
  
    atsci_viterbi_decoder ();
    ~atsci_viterbi_decoder ();
  
    //! reset all decoder states
    void reset ();
  
    /*!
     * Take 12 data segments of soft decisions (floats) and
     * produce 12 RS encoded data segments.  We work in groups of 12
     * because that's the smallest number of segments that composes a
     * single full cycle of the decoder mux.
     */
    void decode (atsc_mpeg_packet_rs_encoded out[NCODERS],
  	       const atsc_soft_data_segment in[NCODERS]);
  
  
  
   protected:
    typedef interleaver_fifo<unsigned char>	fifo_t;
  
    static const int SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH;	// 207
    static const int OUTPUT_SIZE = (SEGMENT_SIZE * 12);
    static const int INPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12);
  
    void decode_helper (unsigned char out[OUTPUT_SIZE],
  		      const float in[INPUT_SIZE]);
  
  
    single_viterbi_t	viterbi[NCODERS];
    fifo_t		*fifo[NCODERS];
    bool			debug;
  
  };
  
  
  
  #endif /* _ATSC_VITERBI_DECODER_H_ */
  