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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* -*- c++ -*- */
/*
* Copyright 2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "puncture_bb_impl.h"
#include <gnuradio/io_signature.h>
#include <pmt/pmt.h>
#include <stdio.h>
#include <volk/volk.h>
#include <boost/bind.hpp>
#include <string>
namespace gr {
namespace fec {
puncture_bb::sptr puncture_bb::make(int puncsize, int puncpat, int delay)
{
return gnuradio::get_initial_sptr(new puncture_bb_impl(puncsize, puncpat, delay));
}
puncture_bb_impl::puncture_bb_impl(int puncsize, int puncpat, int delay)
: block("puncture_bb",
io_signature::make(1, 1, sizeof(char)),
io_signature::make(1, 1, sizeof(char))),
d_puncsize(puncsize),
d_delay(delay)
{
// Create a mask of all 1's of puncsize length
int mask = 0;
for (int i = 0; i < d_puncsize; i++)
mask |= 1 << i;
// Rotate the pattern for the delay value; then mask it if there
// are any excess 1's in the pattern.
for (int i = 0; i < d_delay; ++i) {
puncpat = ((puncpat & 1) << (d_puncsize - 1)) + (puncpat >> 1);
}
d_puncpat = puncpat & mask;
// Calculate the number of holes in the pattern. The mask is all
// 1's given puncsize and puncpat is a pattern with >= puncsize
// 0's (masked to ensure this). The difference between the
// number of 1's in the mask and the puncpat is the number of
// holes.
uint32_t count_mask = 0, count_pat = 0;
volk_32u_popcnt(&count_mask, static_cast<uint32_t>(mask));
volk_32u_popcnt(&count_pat, static_cast<uint32_t>(d_puncpat));
d_puncholes = count_mask - count_pat;
set_fixed_rate(true);
set_relative_rate((uint64_t)(d_puncsize - d_puncholes), (uint64_t)d_puncsize);
set_output_multiple(d_puncsize - d_puncholes);
// set_msg_handler(boost::bind(&puncture_bb_impl::catch_msg, this, _1));
}
puncture_bb_impl::~puncture_bb_impl() {}
int puncture_bb_impl::fixed_rate_ninput_to_noutput(int ninput)
{
return std::lround(((d_puncsize - d_puncholes) / (double)(d_puncsize)) * ninput);
}
int puncture_bb_impl::fixed_rate_noutput_to_ninput(int noutput)
{
return std::lround((d_puncsize / (double)(d_puncsize - d_puncholes)) * noutput);
}
void puncture_bb_impl::forecast(int noutput_items, gr_vector_int& ninput_items_required)
{
ninput_items_required[0] =
std::lround((d_puncsize / (double)(d_puncsize - d_puncholes)) * noutput_items);
}
/*
void
puncture_bb_impl::catch_msg(pmt::pmt_t msg)
{
long mlong = pmt::pmt_to_long(msg);
for(int i = 0; i < mlong; ++i) {
d_puncholes = (d_puncholes >> 1) | ((d_puncholes & 1) << (d_puncsize - 1));
}
}
*/
int puncture_bb_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const char* in = (const char*)input_items[0];
char* out = (char*)output_items[0];
for (int i = 0, k = 0; i < noutput_items / output_multiple(); ++i) {
for (int j = 0; j < d_puncsize; ++j) {
if ((d_puncpat >> (d_puncsize - 1 - j)) & 1) {
out[k++] = in[i * d_puncsize + j];
}
}
}
/*
GR_LOG_DEBUG(d_debug_logger, ">>>>>> start");
for(int i = 0, k=0; i < noutput_items; ++i) {
if((d_puncpat >> (d_puncsize - 1 - (i % d_puncsize))) & 1) {
GR_LOG_DEBUG(d_debug_logger, boost::format("%1%...%2%") \
% out[k++] % in[i]);
}
else {
GR_LOG_DEBUG(d_debug_logger, boost::format("snit %1%") % in[i]);
}
}
GR_LOG_DEBUG(d_debug_logger, boost::format("comp: %1%, %2%\n") \
% noutput_items % ninput_items[0]);
GR_LOG_DEBUG(d_debug_logger, boost::format("consuming %1%") \
% ((int)(((1.0/relative_rate()) * noutput_items) + .5)));
*/
consume_each(std::lround((1.0 / relative_rate()) * noutput_items));
return noutput_items;
}
} /* namespace fec */
} /* namespace gr */
|
