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"""
Copyright 2008, 2009 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
"""
from .. base.Port import Port as _Port
from .. gui.Port import Port as _GUIPort
import Constants
def _get_source_from_virtual_sink_port(vsp):
"""
Resolve the source port that is connected to the given virtual sink port.
Use the get source from virtual source to recursively resolve subsequent ports.
"""
try: return _get_source_from_virtual_source_port(
vsp.get_enabled_connections()[0].get_source())
except: raise Exception, 'Could not resolve source for virtual sink port %s'%vsp
def _get_source_from_virtual_source_port(vsp, traversed=[]):
"""
Recursively resolve source ports over the virtual connections.
Keep track of traversed sources to avoid recursive loops.
"""
if not vsp.get_parent().is_virtual_source(): return vsp
if vsp in traversed: raise Exception, 'Loop found when resolving virtual source %s'%vsp
try: return _get_source_from_virtual_source_port(
_get_source_from_virtual_sink_port(
filter(#get all virtual sinks with a matching stream id
lambda vs: vs.get_param('stream_id').get_value() == vsp.get_parent().get_param('stream_id').get_value(),
filter(#get all enabled blocks that are also virtual sinks
lambda b: b.is_virtual_sink(),
vsp.get_parent().get_parent().get_enabled_blocks(),
),
)[0].get_sink(vsp.get_key())
), traversed + [vsp],
)
except: raise Exception, 'Could not resolve source for virtual source port %s'%vsp
class Port(_Port, _GUIPort):
def __init__(self, block, n, dir):
"""
Make a new port from nested data.
@param block the parent element
@param n the nested odict
@param dir the direction
"""
self._n = n
if n['type'] == 'msg': n['key'] = 'msg'
if dir == 'source' and not n.find('key'):
n['key'] = str(block._source_count)
block._source_count += 1
if dir == 'sink' and not n.find('key'):
n['key'] = str(block._sink_count)
block._sink_count += 1
#build the port
_Port.__init__(
self,
block=block,
n=n,
dir=dir,
)
_GUIPort.__init__(self)
self._nports = n.find('nports') or ''
self._vlen = n.find('vlen') or ''
self._optional = bool(n.find('optional'))
def get_types(self): return ('complex', 'float', 'int', 'short', 'byte', 'msg', '')
def validate(self):
_Port.validate(self)
try: assert self.get_enabled_connections() or self.get_optional()
except AssertionError: self.add_error_message('Port is not connected.')
try: assert self.is_source() or len(self.get_enabled_connections()) <= 1
except AssertionError: self.add_error_message('Port has too many connections.')
#message port logic
if self.get_type() == 'msg':
try: assert not self.get_nports()
except AssertionError: self.add_error_message('A port of type "msg" cannot have "nports" set.')
try: assert self.get_vlen() == 1
except AssertionError: self.add_error_message('A port of type "msg" must have a "vlen" of 1.')
def rewrite(self):
"""
Handle the port cloning for virtual blocks.
"""
_Port.rewrite(self)
if self.get_parent().is_virtual_sink() or self.get_parent().is_virtual_source():
try: #clone type and vlen
source = self.resolve_virtual_source()
self._type = str(source.get_type())
self._vlen = str(source.get_vlen())
except: #reset type and vlen
self._type = ''
self._vlen = ''
def resolve_virtual_source(self):
if self.get_parent().is_virtual_sink(): return _get_source_from_virtual_sink_port(self)
if self.get_parent().is_virtual_source(): return _get_source_from_virtual_source_port(self)
def get_vlen(self):
"""
Get the vector length.
If the evaluation of vlen cannot be cast to an integer, return 1.
@return the vector length or 1
"""
vlen = self.get_parent().resolve_dependencies(self._vlen)
try: return int(self.get_parent().get_parent().evaluate(vlen))
except: return 1
def get_nports(self):
"""
Get the number of ports.
If already blank, return a blank
If the evaluation of nports cannot be cast to an integer, return 1.
@return the number of ports or 1
"""
nports = self.get_parent().resolve_dependencies(self._nports)
#return blank if nports is blank
if not nports: return ''
try:
nports = int(self.get_parent().get_parent().evaluate(nports))
assert 0 < nports
return nports
except: return 1
def get_optional(self): return bool(self._optional)
def get_color(self):
"""
Get the color that represents this port's type.
Codes differ for ports where the vec length is 1 or greater than 1.
@return a hex color code.
"""
try:
if self.get_vlen() == 1:
return {#vlen is 1
'complex': Constants.COMPLEX_COLOR_SPEC,
'float': Constants.FLOAT_COLOR_SPEC,
'int': Constants.INT_COLOR_SPEC,
'short': Constants.SHORT_COLOR_SPEC,
'byte': Constants.BYTE_COLOR_SPEC,
'msg': Constants.MSG_COLOR_SPEC,
}[self.get_type()]
return {#vlen is non 1
'complex': Constants.COMPLEX_VECTOR_COLOR_SPEC,
'float': Constants.FLOAT_VECTOR_COLOR_SPEC,
'int': Constants.INT_VECTOR_COLOR_SPEC,
'short': Constants.SHORT_VECTOR_COLOR_SPEC,
'byte': Constants.BYTE_VECTOR_COLOR_SPEC,
}[self.get_type()]
except: return _Port.get_color(self)
def copy(self, new_key=None):
n = self._n.copy()
if new_key: n['key'] = new_key
return self.__class__(self.get_parent(), n, self._dir)
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