atsc_consts.h

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/* -*- c++ -*- */
/*
 * Copyright 2014 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_DTV_ATSC_CONSTS_H
#define INCLUDED_DTV_ATSC_CONSTS_H

#include <gnuradio/dtv/api.h>

namespace gr {
  namespace dtv {

    // These will go into an mpeg_consts.h once other mod/demods are done
    static const int ATSC_MPEG_DATA_LENGTH       = 187;
    static const int ATSC_MPEG_PKT_LENGTH        = 188;  // sync + data
    static const int ATSC_MPEG_RS_ENCODED_LENGTH = 207;
    static const int MPEG_SYNC_BYTE              = 0x47;
    static const int MPEG_TRANSPORT_ERROR_BIT    = 0x80; // top bit of byte after SYNC

    // ATSC specific constants
    static const double ATSC_SYMBOL_RATE         = 4.5e6/286*684;        // ~10.76 MHz
    static const double ATSC_DATA_SEGMENT_RATE   = ATSC_SYMBOL_RATE/832; // ~12.935 kHz
    static const int ATSC_DATA_SEGMENT_LENGTH    = 832;                  // includes 4 sync symbols at beginning
    static const int ATSC_DSEGS_PER_FIELD        = 312;                  // regular data segs / field

  } /* namespace dtv */
} /* namespace gr */

#endif /* INCLUDED_DTV_ATSC_CONSTS_H */