/* -*- c++ -*- */
/*
 * gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
 *
 *  Copyright (C) 2016,2018
 *  Libre Space Foundation <http://librespacefoundation.org/>
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef INCLUDED_SATNOGS_AX25_ENCODER_MB_IMPL_H
#define INCLUDED_SATNOGS_AX25_ENCODER_MB_IMPL_H

#include <satnogs/ax25_encoder_mb.h>
#include <gnuradio/digital/lfsr.h>

namespace gr {
namespace satnogs {

class ax25_encoder_mb_impl : public ax25_encoder_mb {
private:
  const size_t d_preamble_len;
  const size_t d_postamble_len;
  const bool d_scramble;
  size_t d_remaining;
  size_t d_produced;
  uint8_t d_prev_bit;
  uint8_t *d_encoded_frame;
  uint8_t *d_tmp_buf;
  uint8_t *d_addr_field;
  size_t d_addr_len;
  digital::lfsr d_lfsr;

  void
  add_sob(uint64_t item);
  void
  add_eob(uint64_t item);

public:
  ax25_encoder_mb_impl(const std::string &dest_addr, uint8_t dest_ssid,
                       const std::string &src_addr, uint8_t src_ssid,
                       size_t preamble_len, size_t postamble_len,
                       bool scramble);
  ~ax25_encoder_mb_impl();

  // Where all the action really happens
  int
  work(int noutput_items, gr_vector_const_void_star &input_items,
       gr_vector_void_star &output_items);
};

} // namespace satnogs
} // namespace gr

#endif /* INCLUDED_SATNOGS_AX25_ENCODER_MB_IMPL_H */