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
|
"""
Copyright 2008-2011 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion 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
of the License, or (at your option) any later version.
GNU Radio Companion 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
import os
import sys
import subprocess
import tempfile
from Cheetah.Template import Template
import expr_utils
from Constants import \
TOP_BLOCK_FILE_MODE, HIER_BLOCK_FILE_MODE, \
HIER_BLOCKS_LIB_DIR, FLOW_GRAPH_TEMPLATE
import convert_hier
from .. gui import Messages
class Generator(object):
def __init__(self, flow_graph, file_path):
"""
Initialize the generator object.
Determine the file to generate.
@param flow_graph the flow graph object
@param file_path the path to write the file to
"""
self._flow_graph = flow_graph
self._generate_options = self._flow_graph.get_option('generate_options')
if self._generate_options == 'hb':
self._mode = HIER_BLOCK_FILE_MODE
dirname = HIER_BLOCKS_LIB_DIR
else:
self._mode = TOP_BLOCK_FILE_MODE
dirname = os.path.dirname(file_path)
#handle the case where the directory is read-only
#in this case, use the system's temp directory
if not os.access(dirname, os.W_OK):
dirname = tempfile.gettempdir()
filename = self._flow_graph.get_option('id') + '.py'
self._file_path = os.path.join(dirname, filename)
def get_file_path(self): return self._file_path
def write(self):
#do throttle warning
throttled = any(map(lambda b: b.throttle(), self._flow_graph.get_enabled_blocks()))
if not throttled and self._generate_options != 'hb':
Messages.send_warning('''\
This flow graph may not have flow control: no audio or usrp blocks found. \
Add a Misc->Throttle block to your flow graph to avoid CPU congestion.''')
#generate
open(self.get_file_path(), 'w').write(str(self))
if self._generate_options == 'hb':
#convert hier block to xml wrapper
convert_hier.convert_hier(self._flow_graph, self.get_file_path())
os.chmod(self.get_file_path(), self._mode)
def get_popen(self):
"""
Execute this python flow graph.
@return a popen object
"""
#extract the path to the python executable
python_exe = sys.executable
#when using wx gui on mac os, execute with pythonw
#using pythonw is not necessary anymore, disabled below
#if self._generate_options == 'wx_gui' and 'darwin' in sys.platform.lower():
# python_exe = 'pythonw'
#setup the command args to run
cmds = [python_exe, '-u', self.get_file_path()] #-u is unbuffered stdio
#when in no gui mode on linux, use an xterm (looks nice)
if self._generate_options == 'no_gui' and 'linux' in sys.platform.lower():
cmds = ['xterm', '-e'] + cmds
p = subprocess.Popen(args=cmds, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=False, universal_newlines=True)
return p
def __str__(self):
"""
Convert the flow graph to python code.
@return a string of python code
"""
title = self._flow_graph.get_option('title') or self._flow_graph.get_option('id').replace('_', ' ').title()
imports = self._flow_graph.get_imports()
variables = self._flow_graph.get_variables()
parameters = self._flow_graph.get_parameters()
#list of blocks not including variables and imports and parameters and disabled
def _get_block_sort_text(block):
code = block.get_make().replace(block.get_id(), ' ')
try: code += block.get_param('notebook').get_value() #older gui markup w/ wxgui
except: pass
try: code += block.get_param('gui_hint').get_value() #newer gui markup w/ qtgui
except: pass
return code
blocks = expr_utils.sort_objects(
self._flow_graph.get_enabled_blocks(),
lambda b: b.get_id(), _get_block_sort_text
)
#list of regular blocks (all blocks minus the special ones)
blocks = filter(lambda b: b not in (imports + parameters), blocks)
#list of connections where each endpoint is enabled
connections = filter(lambda c: not (c.is_msg() or c.is_message()), self._flow_graph.get_enabled_connections())
messages = filter(lambda c: c.is_msg(), self._flow_graph.get_enabled_connections())
messages2 = filter(lambda c: c.is_message(), self._flow_graph.get_enabled_connections())
#list of variable names
var_ids = [var.get_id() for var in parameters + variables]
#prepend self.
replace_dict = dict([(var_id, 'self.%s'%var_id) for var_id in var_ids])
#list of callbacks
callbacks = [
expr_utils.expr_replace(cb, replace_dict)
for cb in sum([block.get_callbacks() for block in self._flow_graph.get_enabled_blocks()], [])
]
#map var id to callbacks
var_id2cbs = dict(
[(var_id, filter(lambda c: expr_utils.get_variable_dependencies(c, [var_id]), callbacks))
for var_id in var_ids]
)
#load the namespace
namespace = {
'title': title,
'imports': imports,
'flow_graph': self._flow_graph,
'variables': variables,
'parameters': parameters,
'blocks': blocks,
'connections': connections,
'messages': messages,
'messages2': messages2,
'generate_options': self._generate_options,
'var_id2cbs': var_id2cbs,
}
#build the template
t = Template(open(FLOW_GRAPH_TEMPLATE, 'r').read(), namespace)
return str(t)
|
