blob: 065b6da57f3362d8bd1b8dd0ee046aedad37ba70 (
plain)
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
|
/* -*- c++ -*- */
/*
* Copyright 2015 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ldpc_gen_mtrx_encoder_impl.h"
#include <sstream>
namespace gr {
namespace fec {
namespace code {
generic_encoder::sptr ldpc_gen_mtrx_encoder::make(const ldpc_G_matrix::sptr G_obj)
{
return generic_encoder::sptr(new ldpc_gen_mtrx_encoder_impl(G_obj));
}
ldpc_gen_mtrx_encoder_impl::ldpc_gen_mtrx_encoder_impl(const ldpc_G_matrix::sptr G_obj)
: generic_encoder("ldpc_gen_mtrx_encoder")
{
// Generator matrix to use for encoding
d_G = G_obj;
d_rate = static_cast<double>(d_G->n()) / static_cast<double>(d_G->k());
// Set frame size to k, the # of bits in the information word
// All buffers and settings will be based on this value.
set_frame_size(d_G->k());
}
ldpc_gen_mtrx_encoder_impl::~ldpc_gen_mtrx_encoder_impl() {}
int ldpc_gen_mtrx_encoder_impl::get_output_size() { return d_output_size; }
int ldpc_gen_mtrx_encoder_impl::get_input_size() { return d_frame_size; }
bool ldpc_gen_mtrx_encoder_impl::set_frame_size(unsigned int frame_size)
{
bool ret = true;
if (frame_size % d_G->k() != 0) {
GR_LOG_ERROR(d_logger,
boost::format("Frame size (%1% bits) must be a "
"multiple of the information word "
"size of the LDPC matrix (%2%).") %
frame_size % (d_G->k()));
throw std::runtime_error("ldpc_gen_mtrx_encoder: cannot use frame size.");
}
d_frame_size = frame_size;
d_output_size = static_cast<int>(d_rate * d_frame_size);
return ret;
}
double ldpc_gen_mtrx_encoder_impl::rate() { return d_rate; }
void ldpc_gen_mtrx_encoder_impl::generic_work(void* inbuffer, void* outbuffer)
{
// Populate the information word
const unsigned char* in = (const unsigned char*)inbuffer;
unsigned char* out = (unsigned char*)outbuffer;
int j = 0;
for (int i = 0; i < get_input_size(); i += d_G->k()) {
d_G->encode(&out[j], &in[i]);
j += d_G->n();
}
}
} /* namespace code */
} /* namespace fec */
} /* namespace gr */
|
