"""
Copyright 2008-2012 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_sinks()[0]
), traversed + [vsp],
)
except: raise Exception, 'Could not resolve source for virtual source port %s'%vsp
def _get_sink_from_virtual_source_port(vsp):
"""
Resolve the sink port that is connected to the given virtual source port.
Use the get sink from virtual sink to recursively resolve subsequent ports.
"""
try: return _get_sink_from_virtual_sink_port(
vsp.get_enabled_connections()[0].get_sink()) # Could have many connections, but use first
except: raise Exception, 'Could not resolve source for virtual source port %s'%vsp
def _get_sink_from_virtual_sink_port(vsp, traversed=[]):
"""
Recursively resolve sink ports over the virtual connections.
Keep track of traversed sinks to avoid recursive loops.
"""
if not vsp.get_parent().is_virtual_sink(): return vsp
if vsp in traversed: raise Exception, 'Loop found when resolving virtual sink %s'%vsp
try: return _get_sink_from_virtual_sink_port(
_get_sink_from_virtual_source_port(
filter(#get all virtual source 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_source(),
vsp.get_parent().get_parent().get_enabled_blocks(),
),
)[0].get_sources()[0]
), traversed + [vsp],
)
except: raise Exception, 'Could not resolve source for virtual sink port %s'%vsp
class Port(_Port, _GUIPort):
def __init__(self, block, n, dir):
"""
Make a new port from nested data.
Args:
block: the parent element
n: the nested odict
dir: the direction
"""
self._n = n
if n['type'] == 'msg': n['key'] = 'msg'
if n['type'] == 'message': n['key'] = n['name']
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 Constants.TYPE_TO_SIZEOF.keys()
def is_type_empty(self): return not self._n['type']
def validate(self):
_Port.validate(self)
if not self.get_enabled_connections() and not self.get_optional():
self.add_error_message('Port is not connected.')
if not self.is_source() and (not self.get_type() == "message") and len(self.get_enabled_connections()) > 1:
self.add_error_message('Port has too many connections.')
#message port logic
if self.get_type() == 'msg':
if self.get_nports():
self.add_error_message('A port of type "msg" cannot have "nports" set.')
if self.get_vlen() != 1:
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.is_type_empty():
try: #clone type and vlen
source = self.resolve_empty_type()
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 resolve_empty_type(self):
if self.is_sink():
try:
src = _get_source_from_virtual_sink_port(self)
if not src.is_type_empty(): return src
except: pass
sink = _get_sink_from_virtual_sink_port(self)
if not sink.is_type_empty(): return sink
if self.is_source():
try:
src = _get_source_from_virtual_source_port(self)
if not src.is_type_empty(): return src
except: pass
sink = _get_sink_from_virtual_source_port(self)
if not sink.is_type_empty(): return sink
def get_vlen(self):
"""
Get the vector length.
If the evaluation of vlen cannot be cast to an integer, return 1.
Returns:
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.
Returns:
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))
if 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.
Returns:
a hex color code.
"""
try:
color = Constants.TYPE_TO_COLOR[self.get_type()]
vlen = self.get_vlen()
if vlen == 1: return color
color_val = int(color[1:], 16)
r = (color_val >> 16) & 0xff
g = (color_val >> 8) & 0xff
b = (color_val >> 0) & 0xff
dark = (0, 0, 30, 50, 70)[min(4, vlen)]
r = max(r-dark, 0)
g = max(g-dark, 0)
b = max(b-dark, 0)
return '#%.2x%.2x%.2x'%(r, g, b)
except: return _Port.get_color(self)
def copy(self, new_key=None):
n = self._n.copy()
#remove nports from the key so the copy cannot be a duplicator
if n.has_key('nports'): n.pop('nports')
if new_key: n['key'] = new_key
return self.__class__(self.get_parent(), n, self._dir)