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
|
/* -*- c++ -*- */
/*
* Copyright 2005,2010,2013 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 "message_sink_impl.h"
#include <gnuradio/io_signature.h>
#include <cstdio>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdexcept>
#include <string.h>
namespace gr {
namespace blocks {
message_sink::sptr
message_sink::make(size_t itemsize, msg_queue::sptr msgq, bool dont_block)
{
return gnuradio::get_initial_sptr
(new message_sink_impl(itemsize, msgq, dont_block));
}
message_sink::sptr
message_sink::make(size_t itemsize, msg_queue::sptr msgq, bool dont_block,
const std::string& lengthtagname)
{
return gnuradio::get_initial_sptr
(new message_sink_impl(itemsize, msgq, dont_block, lengthtagname));
}
message_sink_impl::message_sink_impl(size_t itemsize, msg_queue::sptr msgq, bool dont_block)
: sync_block("message_sink",
io_signature::make(1, 1, itemsize),
io_signature::make(0, 0, 0)),
d_itemsize(itemsize), d_msgq(msgq), d_dont_block(dont_block),
d_tags(false), d_items_read(0)
{
}
message_sink_impl::message_sink_impl(size_t itemsize, msg_queue::sptr msgq, bool dont_block,
const std::string& lengthtagname)
: sync_block("message_sink",
io_signature::make(1, 1, itemsize),
io_signature::make(0, 0, 0)),
d_itemsize(itemsize), d_msgq(msgq), d_dont_block(dont_block),
d_tags(true), d_lengthtagname(lengthtagname), d_items_read(0)
{
}
message_sink_impl::~message_sink_impl()
{
}
int
message_sink_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char *) input_items[0];
if (d_tags) {
long packet_length = 0;
std::vector<tag_t> tags;
this->get_tags_in_range(tags, 0, d_items_read, d_items_read+1);
//const size_t ninput_items = noutput_items; //assumption for sync block, this can change
for (unsigned int i = 0; i < tags.size(); i++) {
if (pmt::symbol_to_string(tags[i].key) == d_lengthtagname) {
packet_length = pmt::to_long(tags[i].value);
}
}
assert(packet_length != 0);
// FIXME run this multiple times if input_items >= N * packet_length
if (noutput_items >= packet_length ) {
// If the message queue is full we drop the packet.
if (!d_msgq->full_p()) {
message::sptr msg = message::make(0, // msg type
d_itemsize, // arg1 for other end
packet_length, // arg2 for other end (redundant)
packet_length * d_itemsize); // len of msg
memcpy(msg->msg(), in, packet_length * d_itemsize);
d_msgq->handle(msg); // send it
}
d_items_read += packet_length;
return packet_length;
} else {
return 0;
}
} else {
// If the queue if full we drop all the data we got.
if (!d_msgq->full_p()) {
// build a message to hold whatever we've got
message::sptr msg = message::make(0, // msg type
d_itemsize, // arg1 for other end
noutput_items, // arg2 for other end (redundant)
noutput_items * d_itemsize); // len of msg
memcpy(msg->msg(), in, noutput_items * d_itemsize);
d_msgq->handle(msg); // send it
}
return noutput_items;
}
}
} /* namespace blocks */
} /* namespace gr */
|
