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
147
148
149
150
151
152
153
154
155
156
157
|
/* -*- c++ -*- */
/*
* Copyright 2004,2013,2018 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "packed_to_unpacked_impl.h"
#include <gnuradio/io_signature.h>
#include <boost/format.hpp>
#include <stdexcept>
namespace gr {
namespace blocks {
template <class T>
typename packed_to_unpacked<T>::sptr
packed_to_unpacked<T>::make(unsigned int bits_per_chunk, endianness_t endianness)
{
return gnuradio::make_block_sptr<packed_to_unpacked_impl<T>>(bits_per_chunk,
endianness);
}
template <class T>
packed_to_unpacked_impl<T>::packed_to_unpacked_impl(unsigned int bits_per_chunk,
endianness_t endianness)
: block("packed_to_unpacked",
io_signature::make(1, -1, sizeof(T)),
io_signature::make(1, -1, sizeof(T))),
d_bits_per_chunk(bits_per_chunk),
d_endianness(endianness),
d_index(0)
{
if (bits_per_chunk > d_bits_per_type) {
GR_LOG_ERROR(this->d_logger,
boost::format("Requested to get %d out of a %d bit chunk") %
bits_per_chunk % d_bits_per_type);
throw std::domain_error("can't have more bits in chunk than in output type");
}
this->set_relative_rate((uint64_t)this->d_bits_per_type, (uint64_t)bits_per_chunk);
}
template <class T>
packed_to_unpacked_impl<T>::~packed_to_unpacked_impl()
{
}
template <class T>
void packed_to_unpacked_impl<T>::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
const int input_required = (int)ceil((d_index + noutput_items * d_bits_per_chunk) /
(1.0 * this->d_bits_per_type));
const unsigned ninputs = ninput_items_required.size();
for (unsigned int i = 0; i < ninputs; i++) {
ninput_items_required[i] = input_required;
// printf("Forecast wants %d needs %d\n",noutput_items,ninput_items_required[i]);
}
}
template <class T>
unsigned int packed_to_unpacked_impl<T>::log2_l_type()
{
unsigned int val = sizeof(T);
if (!val || (val & (val - 1))) {
return 0;
}
unsigned int ld = 0;
while (val >>= 1) {
ld++;
}
return ld + 3;
};
template <class T>
unsigned int packed_to_unpacked_impl<T>::get_bit_le(const T* in_vector,
unsigned int bit_addr)
{
const T x = in_vector[bit_addr >> this->log2_l_type()];
return (x >> (bit_addr & (this->d_bits_per_type - 1))) & 1;
}
template <class T>
unsigned int packed_to_unpacked_impl<T>::get_bit_be(const T* in_vector,
unsigned int bit_addr)
{
const T x = in_vector[bit_addr >> this->log2_l_type()];
return (x >>
((this->d_bits_per_type - 1) - (bit_addr & (this->d_bits_per_type - 1)))) &
1;
}
template <class T>
int packed_to_unpacked_impl<T>::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
unsigned int index_tmp = d_index;
const int nstreams = input_items.size();
for (int m = 0; m < nstreams; m++) {
const T* in = (T*)input_items[m];
T* out = (T*)output_items[m];
index_tmp = d_index;
// per stream processing
switch (d_endianness) {
case GR_MSB_FIRST:
for (int i = 0; i < noutput_items; i++) {
// printf("here msb %d\n",i);
T x = 0;
for (unsigned int j = 0; j < d_bits_per_chunk; j++, index_tmp++)
x = (x << 1) | get_bit_be(in, index_tmp);
out[i] = x;
}
break;
case GR_LSB_FIRST:
for (int i = 0; i < noutput_items; i++) {
// printf("here lsb %d\n",i);
T x = 0;
for (unsigned int j = 0; j < d_bits_per_chunk; j++, index_tmp++)
x = (x << 1) | get_bit_le(in, index_tmp);
out[i] = x;
}
break;
default:
GR_LOG_ERROR(this->d_logger, "unknown endianness");
throw std::runtime_error("unknown endianness");
}
}
d_index = index_tmp;
this->consume_each(d_index >> this->log2_l_type());
d_index = d_index & (this->d_bits_per_type - 1);
// printf("got to end\n");
return noutput_items;
}
template class packed_to_unpacked<std::uint8_t>;
template class packed_to_unpacked<std::int16_t>;
template class packed_to_unpacked<std::int32_t>;
} /* namespace blocks */
} /* namespace gr */
|
