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
|
#!/usr/bin/env python
#
# Copyright 2006 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 2, 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.
#
from gnuradio import gr
from gnuradio.eng_option import eng_option
from optparse import OptionParser
class dial_tone_source(gr.hier_block2):
def __init__(self, src, dst, port, pkt_size, sample_rate):
gr.hier_block2.__init__(self,
"dial_tone_source", # Block type
gr.io_signature(0,0,0), # Input signature
gr.io_signature(0,0,0)) # Output signature
amplitude = 0.3
self.define_component("src0", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE,
350, amplitude))
self.define_component("src1", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE,
440, amplitude))
self.define_component("add", gr.add_ff())
# Throttle needed here to account for the other side's audio card sampling rate
self.define_component("thr", gr.throttle(gr.sizeof_float, sample_rate))
self.define_component("dst", gr.udp_sink(gr.sizeof_float, src, 0, dst, port, pkt_size))
self.connect("src0", 0, "add", 0)
self.connect("src1", 0, "add", 1)
self.connect("add", 0, "thr", 0)
self.connect("thr", 0, "dst", 0)
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option)
parser.add_option("", "--src-name", type="string", default="localhost",
help="local host name (domain name or IP address)")
parser.add_option("", "--dst-name", type="string", default="localhost",
help="Remote host name (domain name or IP address")
parser.add_option("", "--dst-port", type="int", default=65500,
help="port value to connect to")
parser.add_option("", "--packet-size", type="int", default=1472,
help="packet size.")
parser.add_option("-r", "--sample-rate", type="int", default=8000,
help="audio signal sample rate [default=%default]")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
raise SystemExit, 1
# Create an instance of a hierarchical block
top_block = dial_tone_source(options.src_name, options.dst_name, options.dst_port,
options.packet_size, options.sample_rate)
# Create an instance of a runtime, passing it the top block
runtime = gr.runtime(top_block)
try:
# Run forever
runtime.run()
except KeyboardInterrupt:
# Ctrl-C exits
pass
|
