100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/* -*- C++ -*- */
|
|
|
|
/*
|
|
* Copyright 2008 Steve Glass
|
|
*
|
|
* This file is part of OP25.
|
|
*
|
|
* OP25 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.
|
|
*
|
|
* OP25 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 OP25; see the file COPYING. If not, write to the Free
|
|
* Software Foundation, Inc., 51 Franklin Street, Boston, MA
|
|
* 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef INCLUDED_TDU_H
|
|
#define INCLUDED_TDU_H
|
|
|
|
#include "abstract_data_unit.h"
|
|
|
|
/**
|
|
* P25 terminator data unit (TDU).
|
|
*/
|
|
class tdu : public abstract_data_unit
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* tdu constructor.
|
|
*
|
|
* \param frame_body A const_bit_queue representing the frame body.
|
|
* \param has_link_control true if frame has link control data, otherwise false.
|
|
*/
|
|
tdu(const_bit_queue& frame_body, bool has_link_control);
|
|
|
|
/**
|
|
* tdu constructor.
|
|
*/
|
|
virtual ~tdu();
|
|
|
|
/**
|
|
* Returns a string describing the Data Unit ID (DUID).
|
|
*/
|
|
std::string duid_str() const;
|
|
|
|
protected:
|
|
|
|
/**
|
|
* Applies error correction code to the specified bit_vector.
|
|
*
|
|
* \param frame_body The bit vector to decode.
|
|
* \return
|
|
*/
|
|
virtual void do_correct_errors(bit_vector& frame_body);
|
|
|
|
/**
|
|
* Apply Golay error correction code to the specified bit_vector.
|
|
*
|
|
* \param frame_body The bit vector to decode.
|
|
* \return
|
|
*/
|
|
virtual void apply_golay_correction(bit_vector& frame_body);
|
|
|
|
/**
|
|
* Apply Reed-Solomon error correction code to the specified
|
|
* bit_vector.
|
|
*
|
|
* \param frame_body The bit vector to decode.
|
|
* \return
|
|
*/
|
|
virtual void apply_rs_correction(bit_vector& frame_body);
|
|
|
|
/**
|
|
* Returns the expected size (in bits) of this data unit in
|
|
* bits. For variable-length data this should return UINT16_MAX
|
|
* until the actual length of this frame is known.
|
|
*
|
|
* \return The expected size (in bits) of this data_unit when encoded.
|
|
*/
|
|
virtual uint16_t frame_size_max() const;
|
|
|
|
private:
|
|
|
|
/**
|
|
* Does this TDU have a link_control field?
|
|
*/
|
|
bool d_has_link_control;
|
|
|
|
};
|
|
|
|
#endif /* INCLUDED_TDU_H */
|