""" 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_sinks()[0] ), 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() #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)