1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/* -*- 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.
*/
#include <itpp/base/vec.h>
#include <itpp/comm/reedsolomon.h>
#include <tdu.h>
#include <op25_yank.h>
using std::string;
tdu::tdu(const_bit_queue& frame_body, bool has_link_control) :
abstract_data_unit(frame_body),
d_has_link_control(has_link_control)
{
}
tdu::~tdu()
{
}
string
tdu::duid_str() const
{
return string("TDU");
}
void
tdu::do_correct_errors(bit_vector& frame)
{
if(d_has_link_control) {
apply_golay_correction(frame);
apply_rs_correction(frame);
}
}
void
tdu::apply_golay_correction(bit_vector& frame)
{
}
void
tdu::apply_rs_correction(bit_vector& frame)
{
#if 0
static itpp::Reed_Solomon rs(63, 17, true);
itpp::bvec b(70);
swab(frame, 114, 122, b, 0);
swab(frame, 122, 126, b, 8);
swab(frame, 138, 142, b, 12);
swab(frame, 144, 152, b, 16);
swab(frame, 164, 176, b, 24);
swab(frame, 188, 200, b, 36);
swab(frame, 212, 213, b, 48);
swab(frame, 216, 226, b, 50);
swab(frame, 238, 250, b, 60);
itpp::bvec bd(rs.decode(b));
#endif
}
uint16_t
tdu::frame_size_max() const
{
return d_has_link_control ? 432 : 144;
}
|
