atsc_viterbi_decoder.h

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/* -*- 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_VITERBI_DECODER_H
#define INCLUDED_ATSC_VITERBI_DECODER_H

#include <gr_sync_block.h>
#include <atsci_viterbi_decoder.h>

class atsc_viterbi_decoder;
typedef boost::shared_ptr<atsc_viterbi_decoder> atsc_viterbi_decoder_sptr;

atsc_viterbi_decoder_sptr atsc_make_viterbi_decoder();

/*!
 * \brief ATSC 12-way interleaved viterbi decoder (atsc_soft_data_segment --> atsc_mpeg_packet_rs_encoded)
 * \ingroup atsc
 *
 * input: atsc_soft_data_segment; output: atsc_mpeg_packet_rs_encoded
 */
class atsc_viterbi_decoder : public gr_sync_block
{
  friend atsc_viterbi_decoder_sptr atsc_make_viterbi_decoder();

  atsci_viterbi_decoder d_viterbi_decoder;

  atsc_viterbi_decoder();

public:
  int work (int noutput_items,
            gr_vector_const_void_star &input_items,
            gr_vector_void_star &output_items);

  void reset() { /* nop */ }

protected:
  int       last_start;

};


#endif /* INCLUDED_ATSC_VITERBI_DECODER_H */