CoreAudio CAShow -> Graphviz Renderer

plot.py

"""
  1) Be someone crazy working with Apple's CoreAudio.
  2) Put "CAShow(graph)" somewhere in your Objective-C code.
  3) Copy the resulting output from your XCode Console window.
  4) Do `pbpaste | python plot.py && open out.png`
  5) See a very basic rendering of the crazy audio graph you've made.
"""

import re
import sys
import pydot
graph = pydot.Dot(graph_type='graph')

def_re = re.compile("\s*node (\d+):")
con_re = re.compile("\s*node\s+(\d+) bus\s+(\d+)\s+=>\s+node\s+(\d+)\s+bus\s+(\d+)")

for line in sys.stdin:
    node_def = def_re.search(line)
    if node_def:
        graph.add_node(pydot.Node(node_def.groups()[0]))
    else:
        con_def = con_re.search(line)
        if con_def:
            src_node, src_bus, dst_node, dst_bus = con_def.groups()
            graph.add_edge(pydot.Edge(src_node, dst_node, label=dst_bus))

graph.write_png('out.png')