+++ /dev/null
-#
-# Copyright 2005 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_swig_python import io_signature
-import weakref
-
-class hier_block_base(object):
- """
- Abstract base class for hierarchical signal processing blocks.
- """
- def __init__(self, fg):
- """
- @param fg: The flow graph that contains this hierarchical block.
- @type fg: gr.flow_graph
- """
- self.fg = weakref.proxy(fg)
-
- def input_signature(self):
- """
- @return input signature of hierarchical block.
- @rtype gr.io_signature
- """
- raise NotImplemented
-
- def output_signature(self):
- """
- @return output signature of hierarchical block.
- @rtype gr.io_signature
- """
- raise NotImplemented
-
- def resolve_input_port(self, port_number):
- """
- @param port_number: which input port number to resolve to an endpoint.
- @type port_number: int
- @return: sequence of endpoints
- @rtype: sequence of endpoint
-
- Note that an input port can resolve to more than one endpoint.
- """
- raise NotImplemented
-
- def resolve_output_port(self, port_number):
- """
- @param port_number: which output port number to resolve to an endpoint.
- @type port_number: int
- @return: endpoint
- @rtype: endpoint
-
- Output ports resolve to a single endpoint.
- """
- raise NotImplemented
-
-
-class hier_block(hier_block_base):
- """
- Simple concrete class for building hierarchical blocks.
-
- This class assumes that there is at most a single block at the
- head of the chain and a single block at the end of the chain.
- Either head or tail may be None indicating a sink or source respectively.
-
- If you needs something more elaborate than this, derive a new class from
- hier_block_base.
- """
- def __init__(self, fg, head_block, tail_block):
- """
- @param fg: The flow graph that contains this hierarchical block.
- @type fg: flow_graph
- @param head_block: the first block in the signal processing chain.
- @type head_block: None or subclass of gr.block or gr.hier_block_base
- @param tail_block: the last block in the signal processing chain.
- @type tail_block: None or subclass of gr.block or gr.hier_block_base
- """
- hier_block_base.__init__(self, fg)
- # FIXME add type checks here for easier debugging of misuse
- self.head = head_block
- self.tail = tail_block
-
- def input_signature(self):
- if self.head:
- return self.head.input_signature()
- else:
- return io_signature(0,0,0)
-
- def output_signature(self):
- if self.tail:
- return self.tail.output_signature()
- else:
- return io_signature(0,0,0)
-
- def resolve_input_port(self, port_number):
- return ((self.head, port_number),)
-
- def resolve_output_port(self, port_number):
- return (self.tail, port_number)
-
-
-class compose(hier_block):
- """
- Compose one or more blocks (primitive or hierarchical) into a new hierarchical block.
- """
- def __init__(self, fg, *blocks):
- """
- @param fg: flow graph
- @type fg: gr.flow_graph
- @param *blocks: list of blocks
- @type *blocks: list of blocks
- """
- if len(blocks) < 1:
- raise ValueError, ("compose requires at least one block; none provided.")
- if len(blocks) > 1:
- fg.connect(*blocks)
- hier_block.__init__(self, fg, blocks[0], blocks[-1])
projects / debian / gnuradio / blobdiff