jack_mixer.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 #
   4 # This file is part of jack_mixer
   5 #
   6 # Copyright (C) 2006-2009 Nedko Arnaudov <nedko@arnaudov.name>
   7 # Copyright (C) 2009 Frederic Peters <fpeters@0d.be>
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; version 2 of the License
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21
  22 from optparse import OptionParser
  23
  24 import gtk
  25 import gobject
  26 import sys
  27 import os
  28 import signal
  29
  30 try:
  31     import lash
  32 except:
  33     lash = None
  34     print >> sys.stderr, "Cannot load LASH python bindings, you want them unless you enjoy manual jack plumbing each time you use this app"
  35
  36 # temporary change Python modules lookup path to look into installation
  37 # directory ($prefix/share/jack_mixer/)
  38 old_path = sys.path
  39 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '..', 'share', 'jack_mixer'))
  40
  41 import jack_mixer_c
  42 import scale
  43 from channel import *
  44
  45 import gui
  46 from preferences import PreferencesDialog
  47
  48 from serialization_xml import XmlSerialization
  49 from serialization import SerializedObject, Serializator
  50
  51 # restore Python modules lookup path
  52 sys.path = old_path
  53
  54 class JackMixer(SerializedObject):
  55
  56     # scales suitable as meter scales
  57     meter_scales = [scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  58
  59     # scales suitable as volume slider scales
  60     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
  61
  62     # name of settngs file that is currently open
  63     current_filename = None
  64
  65     def __init__(self, name, lash_client):
  66         self.mixer = jack_mixer_c.Mixer(name)
  67         if not self.mixer:
  68             return
  69         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  70
  71         self.save = False
  72
  73         if lash_client:
  74             # Send our client name to server
  75             lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
  76             lash.lash_event_set_string(lash_event, name)
  77             lash.lash_send_event(lash_client, lash_event)
  78
  79             lash.lash_jack_client_name(lash_client, name)
  80
  81         gtk.window_set_default_icon_name('jack_mixer')
  82
  83         self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
  84         self.window.set_title(name)
  85
  86         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
  87
  88         self.vbox_top = gtk.VBox()
  89         self.window.add(self.vbox_top)
  90
  91         self.menubar = gtk.MenuBar()
  92         self.vbox_top.pack_start(self.menubar, False)
  93
  94         mixer_menu_item = gtk.MenuItem("_Mixer")
  95         self.menubar.append(mixer_menu_item)
  96         edit_menu_item = gtk.MenuItem('_Edit')
  97         self.menubar.append(edit_menu_item)
  98         help_menu_item = gtk.MenuItem('_Help')
  99         self.menubar.append(help_menu_item)
 100
 101         self.window.set_default_size(120, 300)
 102
 103         mixer_menu = gtk.Menu()
 104         mixer_menu_item.set_submenu(mixer_menu)
 105
 106         add_input_channel = gtk.ImageMenuItem('New _Input Channel')
 107         mixer_menu.append(add_input_channel)
 108         add_input_channel.connect("activate", self.on_add_input_channel)
 109
 110         add_output_channel = gtk.ImageMenuItem('New _Output Channel')
 111         mixer_menu.append(add_output_channel)
 112         add_output_channel.connect("activate", self.on_add_output_channel)
 113
 114         mixer_menu.append(gtk.SeparatorMenuItem())
 115         open = gtk.ImageMenuItem(gtk.STOCK_OPEN)
 116         mixer_menu.append(open)
 117         open.connect('activate', self.on_open_cb)
 118         save = gtk.ImageMenuItem(gtk.STOCK_SAVE)
 119         mixer_menu.append(save)
 120         save.connect('activate', self.on_save_cb)
 121         save_as = gtk.ImageMenuItem(gtk.STOCK_SAVE_AS)
 122         mixer_menu.append(save_as)
 123         save_as.connect('activate', self.on_save_as_cb)
 124
 125         mixer_menu.append(gtk.SeparatorMenuItem())
 126
 127         quit = gtk.ImageMenuItem(gtk.STOCK_QUIT)
 128         mixer_menu.append(quit)
 129         quit.connect('activate', self.on_quit_cb)
 130
 131         edit_menu = gtk.Menu()
 132         edit_menu_item.set_submenu(edit_menu)
 133
 134         self.channel_remove_input_menu_item = gtk.MenuItem('Remove Input Channel')
 135         edit_menu.append(self.channel_remove_input_menu_item)
 136         self.channel_remove_input_menu = gtk.Menu()
 137         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 138
 139         self.channel_remove_output_menu_item = gtk.MenuItem('Remove Output Channel')
 140         edit_menu.append(self.channel_remove_output_menu_item)
 141         self.channel_remove_output_menu = gtk.Menu()
 142         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 143
 144         channel_remove_all_menu_item = gtk.ImageMenuItem(gtk.STOCK_CLEAR)
 145         edit_menu.append(channel_remove_all_menu_item)
 146         channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
 147
 148         edit_menu.append(gtk.SeparatorMenuItem())
 149
 150         preferences = gtk.ImageMenuItem(gtk.STOCK_PREFERENCES)
 151         preferences.connect('activate', self.on_preferences_cb)
 152         edit_menu.append(preferences)
 153
 154         help_menu = gtk.Menu()
 155         help_menu_item.set_submenu(help_menu)
 156
 157         about = gtk.ImageMenuItem(gtk.STOCK_ABOUT)
 158         help_menu.append(about)
 159         about.connect("activate", self.on_about)
 160
 161         self.hbox_top = gtk.HBox()
 162         self.vbox_top.pack_start(self.hbox_top, True)
 163
 164         self.scrolled_window = gtk.ScrolledWindow()
 165         self.hbox_top.pack_start(self.scrolled_window, True)
 166
 167         self.hbox_inputs = gtk.HBox()
 168         self.hbox_inputs.set_spacing(0)
 169         self.hbox_inputs.set_border_width(0)
 170         self.hbox_top.set_spacing(0)
 171         self.hbox_top.set_border_width(0)
 172         self.channels = []
 173         self.output_channels = []
 174
 175         self.scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
 176         self.scrolled_window.add_with_viewport(self.hbox_inputs)
 177
 178         self.main_mix = MainMixChannel(self)
 179         self.hbox_outputs = gtk.HBox()
 180         self.hbox_outputs.set_spacing(0)
 181         self.hbox_outputs.set_border_width(0)
 182         frame = gtk.Frame()
 183         frame.add(self.main_mix)
 184         self.hbox_outputs.pack_start(frame, False)
 185         self.hbox_top.pack_start(self.hbox_outputs, False)
 186
 187         self.window.connect("destroy", gtk.main_quit)
 188
 189         gobject.timeout_add(80, self.read_meters)
 190         self.lash_client = lash_client
 191
 192         gobject.timeout_add(200, self.lash_check_events)
 193
 194     def sighandler(self, signum, frame):
 195         print "Signal %d received" % signum
 196         if signum == signal.SIGUSR1:
 197             self.save = True
 198         elif signum == signal.SIGTERM:
 199             gtk.main_quit()
 200         elif signum == signal.SIGINT:
 201             gtk.main_quit()
 202         else:
 203             print "Unknown signal %d received" % signum
 204
 205     def cleanup(self):
 206         print "Cleaning jack_mixer"
 207         if not self.mixer:
 208             return
 209
 210         for channel in self.channels:
 211             channel.unrealize()
 212
 213     def on_open_cb(self, *args):
 214         dlg = gtk.FileChooserDialog(title='Open', parent=self.window,
 215                         action=gtk.FILE_CHOOSER_ACTION_OPEN,
 216                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 217                                  gtk.STOCK_OPEN, gtk.RESPONSE_OK))
 218         dlg.set_default_response(gtk.RESPONSE_OK)
 219         if dlg.run() == gtk.RESPONSE_OK:
 220             filename = dlg.get_filename()
 221             try:
 222                 f = file(filename, 'r')
 223                 self.load_from_xml(f)
 224             except:
 225                 err = gtk.MessageDialog(self.window,
 226                             gtk.DIALOG_MODAL,
 227                             gtk.MESSAGE_ERROR,
 228                             gtk.BUTTONS_OK,
 229                             "Failed loading settings.")
 230                 err.run()
 231                 err.destroy()
 232             else:
 233                 self.current_filename = filename
 234             finally:
 235                 f.close()
 236         dlg.destroy()
 237
 238     def on_save_cb(self, *args):
 239         if not self.current_filename:
 240             return self.on_save_as_cb()
 241         f = file(self.current_filename, 'w')
 242         self.save_to_xml(f)
 243         f.close()
 244
 245     def on_save_as_cb(self, *args):
 246         dlg = gtk.FileChooserDialog(title='Save', parent=self.window,
 247                         action=gtk.FILE_CHOOSER_ACTION_SAVE,
 248                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 249                                  gtk.STOCK_SAVE, gtk.RESPONSE_OK))
 250         dlg.set_default_response(gtk.RESPONSE_OK)
 251         if dlg.run() == gtk.RESPONSE_OK:
 252             self.current_filename = dlg.get_filename()
 253             self.on_save_cb()
 254         dlg.destroy()
 255
 256     def on_quit_cb(self, *args):
 257         gtk.main_quit()
 258
 259     preferences_dialog = None
 260     def on_preferences_cb(self, widget):
 261         if not self.preferences_dialog:
 262             self.preferences_dialog = PreferencesDialog(self)
 263         self.preferences_dialog.show()
 264         self.preferences_dialog.present()
 265
 266     def on_add_input_channel(self, widget):
 267         dialog = NewChannelDialog(app=self)
 268         dialog.set_transient_for(self.window)
 269         dialog.show()
 270         ret = dialog.run()
 271         dialog.hide()
 272
 273         if ret == gtk.RESPONSE_OK:
 274             result = dialog.get_result()
 275             channel = self.add_channel(**result)
 276             self.window.show_all()
 277
 278     def on_add_output_channel(self, widget):
 279         dialog = NewOutputChannelDialog(app=self)
 280         dialog.set_transient_for(self.window)
 281         dialog.show()
 282         ret = dialog.run()
 283         dialog.hide()
 284
 285         if ret == gtk.RESPONSE_OK:
 286             result = dialog.get_result()
 287             channel = self.add_output_channel(**result)
 288             self.window.show_all()
 289
 290     def on_remove_input_channel(self, widget, channel):
 291         print 'Removing channel "%s"' % channel.channel_name
 292         self.channel_remove_input_menu.remove(widget)
 293         if self.monitored_channel is channel:
 294             channel.monitor_button.set_active(False)
 295         for i in range(len(self.channels)):
 296             if self.channels[i] is channel:
 297                 channel.unrealize()
 298                 del self.channels[i]
 299                 self.hbox_inputs.remove(channel.parent)
 300                 break
 301         if len(self.channels) == 0:
 302             self.channel_remove_input_menu_item.set_sensitive(False)
 303
 304     def on_remove_output_channel(self, widget, channel):
 305         print 'Removing channel "%s"' % channel.channel_name
 306         self.channel_remove_output_menu.remove(widget)
 307         if self.monitored_channel is channel:
 308             channel.monitor_button.set_active(False)
 309         for i in range(len(self.channels)):
 310             if self.output_channels[i] is channel:
 311                 channel.unrealize()
 312                 del self.output_channels[i]
 313                 self.hbox_outputs.remove(channel.parent)
 314                 break
 315         if len(self.output_channels) == 0:
 316             self.channel_remove_output_menu_item.set_sensitive(False)
 317
 318     def on_channels_clear(self, widget):
 319         for channel in self.output_channels:
 320             channel.unrealize()
 321             self.hbox_outputs.remove(channel.parent)
 322         for channel in self.channels:
 323             channel.unrealize()
 324             self.hbox_inputs.remove(channel.parent)
 325         self.channels = []
 326         self.output_channels = []
 327         self.channel_remove_input_menu = gtk.Menu()
 328         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 329         self.channel_remove_input_menu_item.set_sensitive(False)
 330         self.channel_remove_output_menu = gtk.Menu()
 331         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 332         self.channel_remove_output_menu_item.set_sensitive(False)
 333
 334     def add_channel(self, name, stereo, volume_cc, balance_cc):
 335         try:
 336             channel = InputChannel(self, name, stereo)
 337             self.add_channel_precreated(channel)
 338         except Exception:
 339             err = gtk.MessageDialog(self.window,
 340                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 341                             gtk.MESSAGE_ERROR,
 342                             gtk.BUTTONS_OK,
 343                             "Channel creation failed")
 344             err.run()
 345             err.destroy()
 346             return
 347         if volume_cc:
 348             channel.channel.volume_midi_cc = int(volume_cc)
 349         if balance_cc:
 350             channel.channel.balance_midi_cc = int(balance_cc)
 351         if not (volume_cc or balance_cc):
 352             channel.channel.autoset_midi_cc()
 353
 354         return channel
 355
 356     def add_channel_precreated(self, channel):
 357         frame = gtk.Frame()
 358         frame.add(channel)
 359         self.hbox_inputs.pack_start(frame, False)
 360         channel.realize()
 361         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 362         self.channel_remove_input_menu.append(channel_remove_menu_item)
 363         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 364         self.channel_remove_input_menu_item.set_sensitive(True)
 365         self.channels.append(channel)
 366
 367         for outputchannel in self.output_channels:
 368             channel.add_control_group(outputchannel)
 369
 370         # create post fader output channel matching the input channel
 371         channel.post_fader_output_channel = self.mixer.add_output_channel(
 372                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 373         channel.post_fader_output_channel.volume = 0
 374         channel.post_fader_output_channel.set_solo(channel.channel, True)
 375
 376     def read_meters(self):
 377         for channel in self.channels:
 378             channel.read_meter()
 379         self.main_mix.read_meter()
 380         for channel in self.output_channels:
 381             channel.read_meter()
 382         return True
 383
 384     def add_output_channel(self, name, stereo, volume_cc, balance_cc, display_solo_buttons):
 385         try:
 386             channel = OutputChannel(self, name, stereo)
 387             channel.display_solo_buttons = display_solo_buttons
 388             self.add_output_channel_precreated(channel)
 389         except Exception:
 390             err = gtk.MessageDialog(self.window,
 391                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 392                             gtk.MESSAGE_ERROR,
 393                             gtk.BUTTONS_OK,
 394                             "Channel creation failed")
 395             err.run()
 396             err.destroy()
 397             return
 398         if volume_cc:
 399             channel.channel.volume_midi_cc = int(volume_cc)
 400         if balance_cc:
 401             channel.channel.balance_midi_cc = int(balance_cc)
 402         return channel
 403
 404     def add_output_channel_precreated(self, channel):
 405         frame = gtk.Frame()
 406         frame.add(channel)
 407         self.hbox_outputs.pack_start(frame, False)
 408         channel.realize()
 409         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 410         self.channel_remove_output_menu.append(channel_remove_menu_item)
 411         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 412         self.channel_remove_output_menu_item.set_sensitive(True)
 413         self.output_channels.append(channel)
 414
 415     _monitored_channel = None
 416     def get_monitored_channel(self):
 417         return self._monitored_channel
 418
 419     def set_monitored_channel(self, channel):
 420         if self._monitored_channel:
 421             if channel.channel.name == self._monitored_channel.channel.name:
 422                 return
 423         self._monitored_channel = channel
 424         if type(channel) is InputChannel:
 425             # reset all solo/mute settings
 426             for in_channel in self.channels:
 427                 self.monitor_channel.set_solo(in_channel.channel, False)
 428                 self.monitor_channel.set_muted(in_channel.channel, False)
 429             self.monitor_channel.set_solo(channel.channel, True)
 430             self.monitor_channel.prefader = True
 431         else:
 432             self.monitor_channel.prefader = False
 433         self.update_monitor(channel)
 434     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 435
 436     def update_monitor(self, channel):
 437         if self.monitored_channel is not channel:
 438             return
 439         self.monitor_channel.volume = channel.channel.volume
 440         self.monitor_channel.balance = channel.channel.balance
 441         if type(self.monitored_channel) is OutputChannel:
 442             # sync solo/muted channels
 443             for input_channel in self.channels:
 444                 self.monitor_channel.set_solo(input_channel.channel,
 445                                 channel.channel.is_solo(input_channel.channel))
 446                 self.monitor_channel.set_muted(input_channel.channel,
 447                                 channel.channel.is_muted(input_channel.channel))
 448         elif type(self.monitored_channel) is MainMixChannel:
 449             # sync solo/muted channels
 450             for input_channel in self.channels:
 451                 self.monitor_channel.set_solo(input_channel.channel,
 452                                 input_channel.channel.solo)
 453                 self.monitor_channel.set_muted(input_channel.channel,
 454                                 input_channel.channel.mute)
 455
 456     def get_input_channel_by_name(self, name):
 457         for input_channel in self.channels:
 458             if input_channel.channel.name == name:
 459                 return input_channel
 460         return None
 461
 462     def on_about(self, *args):
 463         about = gtk.AboutDialog()
 464         about.set_name('jack_mixer')
 465         about.set_copyright('Copyright © 2006-2009\nNedko Arnaudov, Frederic Peters')
 466         about.set_license('''\
 467 jack_mixer is free software; you can redistribute it and/or modify it
 468 under the terms of the GNU General Public License as published by the
 469 Free Software Foundation; either version 2 of the License, or (at your
 470 option) any later version.
 471
 472 jack_mixer is distributed in the hope that it will be useful, but
 473 WITHOUT ANY WARRANTY; without even the implied warranty of
 474 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 475 General Public License for more details.
 476
 477 You should have received a copy of the GNU General Public License along
 478 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 479 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 480         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 481                            'Frederic Peters <fpeters@0d.be>'])
 482         about.set_logo_icon_name('jack_mixer')
 483         about.set_website('http://home.gna.org/jackmixer/')
 484
 485         about.run()
 486         about.destroy()
 487
 488     def lash_check_events(self):
 489         if self.current_filename and self.save:
 490             print "saving on SIGUSR1 request"
 491             self.on_save_cb()
 492             print "save done"
 493             self.save = False
 494             return True
 495
 496         if not self.lash_client:
 497             return True
 498
 499         while lash.lash_get_pending_event_count(self.lash_client):
 500             event = lash.lash_get_event(self.lash_client)
 501
 502             #print repr(event)
 503
 504             event_type = lash.lash_event_get_type(event)
 505             if event_type == lash.LASH_Quit:
 506                 print "jack_mixer: LASH ordered quit."
 507                 gtk.main_quit()
 508                 return False
 509             elif event_type == lash.LASH_Save_File:
 510                 directory = lash.lash_event_get_string(event)
 511                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 512                 filename = directory + os.sep + "jack_mixer.xml"
 513                 f = file(filename, "w")
 514                 self.save_to_xml(f)
 515                 f.close()
 516                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 517             elif event_type == lash.LASH_Restore_File:
 518                 directory = lash.lash_event_get_string(event)
 519                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 520                 filename = directory + os.sep + "jack_mixer.xml"
 521                 f = file(filename, "r")
 522                 self.load_from_xml(f, silence_errors=True)
 523                 f.close()
 524                 lash.lash_send_event(self.lash_client, event)
 525             else:
 526                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 527                 return True
 528
 529             #lash.lash_event_destroy(event)
 530
 531         return True
 532
 533     def save_to_xml(self, file):
 534         #print "Saving to XML..."
 535         b = XmlSerialization()
 536         s = Serializator()
 537         s.serialize(self, b)
 538         b.save(file)
 539
 540     def load_from_xml(self, file, silence_errors=False):
 541         #print "Loading from XML..."
 542         self.on_channels_clear(None)
 543         self.unserialized_channels = []
 544         b = XmlSerialization()
 545         try:
 546             b.load(file)
 547         except:
 548             if silence_errors:
 549                 return
 550             raise
 551         s = Serializator()
 552         s.unserialize(self, b)
 553         for channel in self.unserialized_channels:
 554             if isinstance(channel, InputChannel):
 555                 self.add_channel_precreated(channel)
 556         for channel in self.unserialized_channels:
 557             if isinstance(channel, OutputChannel):
 558                 self.add_output_channel_precreated(channel)
 559         del self.unserialized_channels
 560         self.window.show_all()
 561
 562     def serialize(self, object_backend):
 563         object_backend.add_property('geometry',
 564                         '%sx%s' % (self.window.allocation.width, self.window.allocation.height))
 565
 566     def unserialize_property(self, name, value):
 567         if name == 'geometry':
 568             width, height = value.split('x')
 569             self.window.resize(int(width), int(height))
 570             return True
 571
 572     def unserialize_child(self, name):
 573         if name == MainMixChannel.serialization_name():
 574             return self.main_mix
 575
 576         if name == InputChannel.serialization_name():
 577             channel = InputChannel(self, "", True)
 578             self.unserialized_channels.append(channel)
 579             return channel
 580
 581         if name == OutputChannel.serialization_name():
 582             channel = OutputChannel(self, "", True)
 583             self.unserialized_channels.append(channel)
 584             return channel
 585
 586     def serialization_get_childs(self):
 587         '''Get child objects tha required and support serialization'''
 588         childs = self.channels[:] + self.output_channels[:]
 589         childs.append(self.main_mix)
 590         return childs
 591
 592     def serialization_name(self):
 593         return "jack_mixer"
 594
 595     def main(self):
 596         self.main_mix.realize()
 597         self.main_mix.set_monitored()
 598
 599         if not self.mixer:
 600             return
 601
 602         self.window.show_all()
 603
 604         signal.signal(signal.SIGUSR1, self.sighandler)
 605         signal.signal(signal.SIGTERM, self.sighandler)
 606         signal.signal(signal.SIGINT, self.sighandler)
 607
 608         gtk.main()
 609
 610         #f = file("/dev/stdout", "w")
 611         #self.save_to_xml(f)
 612         #f.close
 613
 614 def help():
 615     print "Usage: %s [mixer_name]" % sys.argv[0]
 616
 617 def main():
 618     # Connect to LASH if Python bindings are available, and the user did not
 619     # pass --no-lash
 620     if lash and not '--no-lash' in sys.argv:
 621         # sys.argv is modified by this call
 622         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 623     else:
 624         lash_client = None
 625
 626     parser = OptionParser()
 627     parser.add_option('-c', '--config', dest='config',
 628                       help='use a non default configuration file')
 629     # --no-lash here is not acted upon, it is specified for completeness when
 630     # --help is passed.
 631     parser.add_option('--no-lash', dest='nolash', action='store_true',
 632                       help='do not connect to LASH')
 633     options, args = parser.parse_args()
 634
 635     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 636     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 637     if lash_client:
 638         print "Successfully connected to LASH server at " +  lash.lash_get_server_name(lash_client)
 639
 640     if len(args) == 1:
 641         name = args[0]
 642     else:
 643         name = None
 644
 645     if not name:
 646         name = "jack_mixer-%u" % os.getpid()
 647
 648     gtk.gdk.threads_init()
 649     try:
 650         mixer = JackMixer(name, lash_client)
 651     except Exception, e:
 652         err = gtk.MessageDialog(None,
 653                             gtk.DIALOG_MODAL,
 654                             gtk.MESSAGE_ERROR,
 655                             gtk.BUTTONS_OK,
 656                             "Mixer creation failed (%s)" % str(e))
 657         err.run()
 658         err.destroy()
 659         sys.exit(1)
 660
 661     if options.config:
 662         f = file(options.config)
 663         mixer.current_filename = options.config
 664         try:
 665             mixer.load_from_xml(f)
 666         except:
 667             err = gtk.MessageDialog(mixer.window,
 668                             gtk.DIALOG_MODAL,
 669                             gtk.MESSAGE_ERROR,
 670                             gtk.BUTTONS_OK,
 671                             "Failed loading settings.")
 672             err.run()
 673             err.destroy()
 674         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 675         f.close()
 676
 677     mixer.main()
 678
 679     mixer.cleanup()
 680
 681 if __name__ == "__main__":
 682     main()