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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
# Copyright 2008 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.
#
from gnuradio import gr
import gnuradio.gr.gr_threading as _threading
import numpy
#######################################################################################
## Queue Sink Thread
#######################################################################################
class queue_sink_thread(_threading.Thread):
"""
Read samples from the queue sink and execute the callback.
"""
def __init__(self, queue_sink, callback):
"""
Queue sink thread contructor.
@param queue_sink the queue to pop messages from
@param callback the function of one argument
"""
self._queue_sink = queue_sink
self._callback = callback
_threading.Thread.__init__(self)
self.setDaemon(1)
self.keep_running = True
self.start()
def run(self):
while self.keep_running:
self._callback(self._queue_sink.pop())
#######################################################################################
## Queue Sink
#######################################################################################
class _queue_sink_base(gr.hier_block2):
"""
Queue sink base, a queue sink for any size queue.
Easy read access to a gnuradio data stream from python.
Call pop to read a sample from a gnuradio data stream.
Samples are cast as python data types, complex, float, or int.
"""
def __init__(self, vlen=1):
"""
Queue sink base contructor.
@param vlen the vector length
"""
self._vlen = vlen
#initialize hier2
gr.hier_block2.__init__(
self,
"queue_sink",
gr.io_signature(1, 1, self._item_size*self._vlen), # Input signature
gr.io_signature(0, 0, 0) # Output signature
)
#create message sink
self._msgq = gr.msg_queue(1)
message_sink = gr.message_sink(self._item_size*self._vlen, self._msgq, False) #False -> blocking
#connect
self.connect(self, message_sink)
self.arr = ''
def pop(self):
"""
Pop a new sample off the front of the queue.
@return a new sample
"""
while len(self.arr) < self._item_size*self._vlen:
msg = self._msgq.delete_head()
self.arr = self.arr + msg.to_string()
sample = self.arr[:self._item_size*self._vlen]
self.arr = self.arr[self._item_size*self._vlen:]
sample = map(self._cast, numpy.fromstring(sample, self._numpy))
if self._vlen == 1: return sample[0]
return sample
class queue_sink_c(_queue_sink_base):
_item_size = gr.sizeof_gr_complex
_numpy = numpy.complex64
def _cast(self, arg): return complex(arg.real, arg.imag)
class queue_sink_f(_queue_sink_base):
_item_size = gr.sizeof_float
_numpy = numpy.float32
_cast = float
class queue_sink_i(_queue_sink_base):
_item_size = gr.sizeof_int
_numpy = numpy.int32
_cast = int
class queue_sink_s(_queue_sink_base):
_item_size = gr.sizeof_short
_numpy = numpy.int16
_cast = int
class queue_sink_b(_queue_sink_base):
_item_size = gr.sizeof_char
_numpy = numpy.int8
_cast = int
#######################################################################################
## Queue Source
#######################################################################################
class _queue_source_base(gr.hier_block2):
"""
Queue source base, a queue source for any size queue.
Easy write access to a gnuradio data stream from python.
Call push to to write a sample into the gnuradio data stream.
"""
def __init__(self, vlen=1):
"""
Queue source base contructor.
@param vlen the vector length
"""
self._vlen = vlen
#initialize hier2
gr.hier_block2.__init__(
self,
"queue_source",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, self._item_size*self._vlen) # Output signature
)
#create message source
message_source = gr.message_source(self._item_size*self._vlen, 1)
self._msgq = message_source.msgq()
#connect
self.connect(message_source, self)
def push(self, item):
"""
Push an item into the back of the queue.
@param item the item
"""
if self._vlen == 1: item = [item]
arr = numpy.array(item, self._numpy)
msg = gr.message_from_string(arr.tostring(), 0, self._item_size, self._vlen)
self._msgq.insert_tail(msg)
class queue_source_c(_queue_source_base):
_item_size = gr.sizeof_gr_complex
_numpy = numpy.complex64
class queue_source_f(_queue_source_base):
_item_size = gr.sizeof_float
_numpy = numpy.float32
class queue_source_i(_queue_source_base):
_item_size = gr.sizeof_int
_numpy = numpy.int32
class queue_source_s(_queue_source_base):
_item_size = gr.sizeof_short
_numpy = numpy.int16
class queue_source_b(_queue_source_base):
_item_size = gr.sizeof_char
_numpy = numpy.int8
|
