~ubuntustudio-dev/ubuntustudio-packaging/jack-rack

#!/usr/bin/python

# ecarack: use ecasound to run a saved JACK Rack configuration.

# This is rather simplistic: it only looks at plugin controls and the Enable

# buttons, so MIDI controls, wet/dry settings and the like will be ignored.

# Copyright (C) 2007 Adam Sampson <ats@offog.org>

#

# This program 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.

#

# This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.

import sys, os, gzip, xml.dom.minidom

def main(args):

	if len(args) != 1 or args[0] == "--help":

		print >>sys.stderr, "Usage: ecarack RACK-FILE"

		return 1

	try:

		f = gzip.open(args[0], "r")

	except IOError, e:

		print >>sys.stderr, "Failed to open %s: %s" % (args[0], e)

		return 1

	try:

		dom = xml.dom.minidom.parse(f)

	except:

		print >>sys.stderr, "Failed to parse %s" % args[0]

		return 1

	f.close()

	cmd = ["ecasound", "-i:jack_auto", "-o:jack_auto"]

	def get(node, tag):

		return node.getElementsByTagName(tag)

	def text(node):

		if node.nodeType == node.TEXT_NODE:

			return node.data

		else:

			return " ".join(map(text, node.childNodes)).strip()

	for plugin in get(dom, "plugin"):

		if text(get(plugin, "enabled")[0]) == "false":

			continue

		id = text(get(plugin, "id")[0])

		controls = [text(get(n, "value")[0])

		            for n in get(plugin, "controlrow")]

		cmd.append("-eli:" + id + "".join(["," + v for v in controls]))

	print >>sys.stderr, "ecarack: running " + " ".join(cmd)

	os.execvp(cmd[0], cmd)

	return 1

if __name__ == "__main__":

	sys.exit(main(sys.argv[1:]))