pyjack-0.5.2/demos/alsa_midi_busconnect.py

   1 #!/usr/bin/python
   2 # -*- coding: utf-8 -*-
   3
   4 import re
   5 import os
   6
   7 def _getClients(typeOfClient):
   8         lines=[line.strip() for line in os.popen("LANG=C aconnect -%s" % typeOfClient).readlines()]
   9         listOfClients=[]
  10         temporalList=[]
  11         for line in lines:
  12                 if line.find("client ")==0:
  13                         listOfClients.append(dict())
  14                         listOfClients[-1]["clientName"]=re.search("'(.*)'",line).group(1)
  15                         listOfClients[-1]["clientNumber"]=int(re.search("client (.*):",line).group(1))
  16                         if len(temporalList)>0:
  17                                 listOfClients[-2]["ports"]=temporalList
  18                         temporalList=[]
  19                 else:
  20                         line=re.search("'(.*)'",line).group(1)
  21                         temporalList.append(line)
  22         listOfClients[-1]["ports"]=temporalList
  23         return listOfClients
  24
  25 def _getClientPorts(name,typeOfClient):
  26         listOfClients=_getClients(typeOfClient)
  27         try:
  28                 index=[client['clientName'] for client in listOfClients].index(name)
  29         except:
  30                 print "WARNING: trying to get ports of client %s, which doesn't exist. Returning an empty list." % name
  31                 return []
  32         if index == -1:
  33                 return None
  34         client=listOfClients[index]
  35         return [ "%s:%i" % (client["clientNumber"],client["ports"].index(port)) for port in client["ports"] ]
  36
  37 def getInputClients():
  38         return _getClients("o")
  39
  40 def getOutputClients():
  41         return _getClients("i")
  42
  43 def getClientInputPorts(name):
  44         return _getClientPorts(name,"o")
  45
  46 def getClientOutputPorts(name):
  47         return _getClientPorts(name,"i")
  48
  49 def connect(source,target):
  50         os.system("aconnect %s %s" % (source,target))
  51
  52 def bus_connect(source, target):
  53         """
  54         Connects two lists of ports. The arguments can be a list or a string. If the latter, all the available ports of the client will be used.
  55         """
  56         sources = source if type(source) == type([]) else getClientOutputPorts(source)
  57         targets = target if type(target) == type([]) else getClientInputPorts(target)
  58         num_connections = min(len(sources), len(targets))
  59         print 'Doing %i connections. Client has %i out ports and target has %i in ports' % (num_connections, len(sources), len(targets))
  60         for i in xrange(num_connections) :
  61                 print 'connect', sources[i], targets[i]
  62                 connect(sources[i], targets[i])
  63         return num_connections != 0
  64
  65 def main():
  66         print "input clients: "
  67         print getInputClients()
  68         print "output ones: "
  69         print getOutputClients()
  70         print "Midi Through:"
  71         print getClientInputPorts("Midi Through")
  72         print "Midi Through outputs:"
  73         print getClientOutputPorts("Midi Through")
  74         bus_connect("Midi Through","Midi Through")
  75
  76 if __name__ == '__main__':
  77         main()