GNU Radio Manual and C++ API Reference
3.7.5
The Free & Open Software Radio Ecosystem
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Properties
Friends
Macros
Groups
Pages
crc32_async_bb.h
Go to the documentation of this file.
1
/* -*- c++ -*- */
2
/*
3
* Copyright 2014 Free Software Foundation, Inc.
4
*
5
* This file is part of GNU Radio
6
*
7
* GNU Radio is free software; you can redistribute it and/or modify
8
* it under the terms of the GNU General Public License as published by
9
* the Free Software Foundation; either version 3, or (at your option)
10
* any later version.
11
*
12
* GNU Radio is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15
* GNU General Public License for more details.
16
*
17
* You should have received a copy of the GNU General Public License
18
* along with GNU Radio; see the file COPYING. If not, write to
19
* the Free Software Foundation, Inc., 51 Franklin Street,
20
* Boston, MA 02110-1301, USA.
21
*/
22
23
24
#ifndef INCLUDED_DIGITAL_CRC32_ASYNC_BB_H
25
#define INCLUDED_DIGITAL_CRC32_ASYNC_BB_H
26
27
#include <
gnuradio/digital/api.h
>
28
#include <
gnuradio/block.h
>
29
30
namespace
gr {
31
namespace
digital {
32
33
/*!
34
* \brief Byte-stream CRC block for async messages
35
* \ingroup packet_operators_blk
36
*
37
* \details
38
*
39
* Processes packets (as async PDU messages) for CRC32. The \p
40
* check parameter determines if the block acts to check and strip
41
* the CRC or to calculate and append the CRC32.
42
*
43
* The input PDU is expected to be a message of packet bytes.
44
*
45
* When using check mode, if the CRC passes, the output is a
46
* payload of the message with the CRC stripped, so the output
47
* will be 4 bytes smaller than the input.
48
*
49
* When using calculate mode (check == false), then the CRC is
50
* calculated on the PDU and appended to it. The output is then 4
51
* bytes longer than the input.
52
*
53
* This block implements the CRC32 using the Boost crc_optimal
54
* class for 32-bit CRCs with the standard generator 0x04C11DB7.
55
*/
56
class
DIGITAL_API
crc32_async_bb
:
virtual
public
block
57
{
58
public
:
59
typedef
boost::shared_ptr<crc32_async_bb>
sptr
;
60
61
/*!
62
* \param check Set to true if you want to check CRC, false to create CRC.
63
*/
64
static
sptr
make(
bool
check=
false
);
65
};
66
67
}
// namespace digital
68
}
// namespace gr
69
70
#endif
/* INCLUDED_DIGITAL_CRC32_ASYNC_BB_H */
gr-digital
include
gnuradio
digital
crc32_async_bb.h
Generated on Fri Oct 3 2014 00:33:50 for GNU Radio Manual and C++ API Reference by
1.8.1.2