86 lines
1.8 KiB
C++
86 lines
1.8 KiB
C++
/* -*- C++ -*- */
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/*
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* Copyright 2008 Steve Glass
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*
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* This file is part of OP25.
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*
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* OP25 is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* OP25 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OP25; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Boston, MA
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* 02110-1301, USA.
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*/
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#include "tdu.h"
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#include "op25_yank.h"
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#include <itpp/base/vec.h>
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#include <itpp/comm/reedsolomon.h>
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using std::string;
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tdu::tdu(const_bit_queue& frame_body, bool has_link_control) :
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abstract_data_unit(frame_body),
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d_has_link_control(has_link_control)
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{
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}
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tdu::~tdu()
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{
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}
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string
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tdu::duid_str() const
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{
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return string("TDU");
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}
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void
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tdu::do_correct_errors(bit_vector& frame)
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{
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if(d_has_link_control) {
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apply_golay_correction(frame);
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apply_rs_correction(frame);
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}
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}
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void
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tdu::apply_golay_correction(bit_vector& frame)
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{
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}
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void
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tdu::apply_rs_correction(bit_vector& frame)
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{
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#if 0
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static itpp::Reed_Solomon rs(63, 17, true);
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itpp::bvec b(70);
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swab(frame, 114, 122, b, 0);
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swab(frame, 122, 126, b, 8);
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swab(frame, 138, 142, b, 12);
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swab(frame, 144, 152, b, 16);
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swab(frame, 164, 176, b, 24);
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swab(frame, 188, 200, b, 36);
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swab(frame, 212, 213, b, 48);
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swab(frame, 216, 226, b, 50);
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swab(frame, 238, 250, b, 60);
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itpp::bvec bd(rs.decode(b));
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#endif
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}
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uint16_t
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tdu::frame_size_max() const
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{
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return d_has_link_control ? 432 : 144;
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}
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