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_edit_input_menu_item = gtk.MenuItem('_Edit Input Channel')
 135         edit_menu.append(self.channel_edit_input_menu_item)
 136         self.channel_edit_input_menu = gtk.Menu()
 137         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 138
 139         self.channel_edit_output_menu_item = gtk.MenuItem('Edit _Output Channel')
 140         edit_menu.append(self.channel_edit_output_menu_item)
 141         self.channel_edit_output_menu = gtk.Menu()
 142         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 143
 144         self.channel_remove_input_menu_item = gtk.MenuItem('Remove _Input Channel')
 145         edit_menu.append(self.channel_remove_input_menu_item)
 146         self.channel_remove_input_menu = gtk.Menu()
 147         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 148
 149         self.channel_remove_output_menu_item = gtk.MenuItem('_Remove Output Channel')
 150         edit_menu.append(self.channel_remove_output_menu_item)
 151         self.channel_remove_output_menu = gtk.Menu()
 152         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 153
 154         channel_remove_all_menu_item = gtk.ImageMenuItem(gtk.STOCK_CLEAR)
 155         edit_menu.append(channel_remove_all_menu_item)
 156         channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
 157
 158         edit_menu.append(gtk.SeparatorMenuItem())
 159
 160         preferences = gtk.ImageMenuItem(gtk.STOCK_PREFERENCES)
 161         preferences.connect('activate', self.on_preferences_cb)
 162         edit_menu.append(preferences)
 163
 164         help_menu = gtk.Menu()
 165         help_menu_item.set_submenu(help_menu)
 166
 167         about = gtk.ImageMenuItem(gtk.STOCK_ABOUT)
 168         help_menu.append(about)
 169         about.connect("activate", self.on_about)
 170
 171         self.hbox_top = gtk.HBox()
 172         self.vbox_top.pack_start(self.hbox_top, True)
 173
 174         self.scrolled_window = gtk.ScrolledWindow()
 175         self.hbox_top.pack_start(self.scrolled_window, True)
 176
 177         self.hbox_inputs = gtk.HBox()
 178         self.hbox_inputs.set_spacing(0)
 179         self.hbox_inputs.set_border_width(0)
 180         self.hbox_top.set_spacing(0)
 181         self.hbox_top.set_border_width(0)
 182         self.channels = []
 183         self.output_channels = []
 184
 185         self.scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
 186         self.scrolled_window.add_with_viewport(self.hbox_inputs)
 187
 188         self.main_mix = MainMixChannel(self)
 189         self.hbox_outputs = gtk.HBox()
 190         self.hbox_outputs.set_spacing(0)
 191         self.hbox_outputs.set_border_width(0)
 192         frame = gtk.Frame()
 193         frame.add(self.main_mix)
 194         self.hbox_outputs.pack_start(frame, False)
 195         self.hbox_top.pack_start(self.hbox_outputs, False)
 196
 197         self.window.connect("destroy", gtk.main_quit)
 198
 199         gobject.timeout_add(80, self.read_meters)
 200         self.lash_client = lash_client
 201
 202         gobject.timeout_add(200, self.lash_check_events)
 203
 204         gobject.timeout_add(50, self.midi_events_check)
 205
 206     def sighandler(self, signum, frame):
 207         #print "Signal %d received" % signum
 208         if signum == signal.SIGUSR1:
 209             self.save = True
 210         elif signum == signal.SIGTERM:
 211             gtk.main_quit()
 212         elif signum == signal.SIGINT:
 213             gtk.main_quit()
 214         else:
 215             print "Unknown signal %d received" % signum
 216
 217     def cleanup(self):
 218         print "Cleaning jack_mixer"
 219         if not self.mixer:
 220             return
 221
 222         for channel in self.channels:
 223             channel.unrealize()
 224
 225         self.mixer.destroy()
 226
 227     def on_open_cb(self, *args):
 228         dlg = gtk.FileChooserDialog(title='Open', parent=self.window,
 229                         action=gtk.FILE_CHOOSER_ACTION_OPEN,
 230                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 231                                  gtk.STOCK_OPEN, gtk.RESPONSE_OK))
 232         dlg.set_default_response(gtk.RESPONSE_OK)
 233         if dlg.run() == gtk.RESPONSE_OK:
 234             filename = dlg.get_filename()
 235             try:
 236                 f = file(filename, 'r')
 237                 self.load_from_xml(f)
 238             except:
 239                 err = gtk.MessageDialog(self.window,
 240                             gtk.DIALOG_MODAL,
 241                             gtk.MESSAGE_ERROR,
 242                             gtk.BUTTONS_OK,
 243                             "Failed loading settings.")
 244                 err.run()
 245                 err.destroy()
 246             else:
 247                 self.current_filename = filename
 248             finally:
 249                 f.close()
 250         dlg.destroy()
 251
 252     def on_save_cb(self, *args):
 253         if not self.current_filename:
 254             return self.on_save_as_cb()
 255         f = file(self.current_filename, 'w')
 256         self.save_to_xml(f)
 257         f.close()
 258
 259     def on_save_as_cb(self, *args):
 260         dlg = gtk.FileChooserDialog(title='Save', parent=self.window,
 261                         action=gtk.FILE_CHOOSER_ACTION_SAVE,
 262                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 263                                  gtk.STOCK_SAVE, gtk.RESPONSE_OK))
 264         dlg.set_default_response(gtk.RESPONSE_OK)
 265         if dlg.run() == gtk.RESPONSE_OK:
 266             self.current_filename = dlg.get_filename()
 267             self.on_save_cb()
 268         dlg.destroy()
 269
 270     def on_quit_cb(self, *args):
 271         gtk.main_quit()
 272
 273     preferences_dialog = None
 274     def on_preferences_cb(self, widget):
 275         if not self.preferences_dialog:
 276             self.preferences_dialog = PreferencesDialog(self)
 277         self.preferences_dialog.show()
 278         self.preferences_dialog.present()
 279
 280     def on_add_input_channel(self, widget):
 281         dialog = NewChannelDialog(app=self)
 282         dialog.set_transient_for(self.window)
 283         dialog.show()
 284         ret = dialog.run()
 285         dialog.hide()
 286
 287         if ret == gtk.RESPONSE_OK:
 288             result = dialog.get_result()
 289             channel = self.add_channel(**result)
 290             self.window.show_all()
 291
 292     def on_add_output_channel(self, widget):
 293         dialog = NewOutputChannelDialog(app=self)
 294         dialog.set_transient_for(self.window)
 295         dialog.show()
 296         ret = dialog.run()
 297         dialog.hide()
 298
 299         if ret == gtk.RESPONSE_OK:
 300             result = dialog.get_result()
 301             channel = self.add_output_channel(**result)
 302             self.window.show_all()
 303
 304     def on_edit_input_channel(self, widget, channel):
 305         print 'Editing channel "%s"' % channel.channel_name
 306         channel.on_channel_properties()
 307
 308     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 309         if (widget.get_label() == label):
 310             self.channel_edit_input_menu.remove(widget)
 311
 312     def on_remove_input_channel(self, widget, channel):
 313         print 'Removing channel "%s"' % channel.channel_name
 314         self.channel_remove_input_menu.remove(widget)
 315         self.channel_edit_input_menu.foreach(
 316             self.remove_channel_edit_input_menuitem_by_label,
 317             channel.channel_name);
 318         if self.monitored_channel is channel:
 319             channel.monitor_button.set_active(False)
 320         for i in range(len(self.channels)):
 321             if self.channels[i] is channel:
 322                 channel.unrealize()
 323                 del self.channels[i]
 324                 self.hbox_inputs.remove(channel.parent)
 325                 break
 326         if len(self.channels) == 0:
 327             self.channel_remove_input_menu_item.set_sensitive(False)
 328
 329     def on_edit_output_channel(self, widget, channel):
 330         print 'Editing channel "%s"' % channel.channel_name
 331         channel.on_channel_properties()
 332
 333     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 334         if (widget.get_label() == label):
 335             self.channel_edit_output_menu.remove(widget)
 336
 337     def on_remove_output_channel(self, widget, channel):
 338         print 'Removing channel "%s"' % channel.channel_name
 339         self.channel_remove_output_menu.remove(widget)
 340         self.channel_edit_output_menu.foreach(
 341             self.remove_channel_edit_output_menuitem_by_label,
 342             channel.channel_name);
 343         if self.monitored_channel is channel:
 344             channel.monitor_button.set_active(False)
 345         for i in range(len(self.channels)):
 346             if self.output_channels[i] is channel:
 347                 channel.unrealize()
 348                 del self.output_channels[i]
 349                 self.hbox_outputs.remove(channel.parent)
 350                 break
 351         if len(self.output_channels) == 0:
 352             self.channel_remove_output_menu_item.set_sensitive(False)
 353
 354     def rename_channels(self, container, parameters):
 355         if (container.get_label() == parameters['oldname']):
 356             container.set_label(parameters['newname'])
 357
 358     def on_channel_rename(self, oldname, newname):
 359         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 360         self.channel_edit_input_menu.foreach(self.rename_channels,
 361             rename_parameters)
 362         self.channel_edit_output_menu.foreach(self.rename_channels,
 363             rename_parameters)
 364         self.channel_remove_input_menu.foreach(self.rename_channels,
 365             rename_parameters)
 366         self.channel_remove_output_menu.foreach(self.rename_channels,
 367             rename_parameters)
 368         print "Renaming channel from %s to %s\n" % (oldname, newname)
 369
 370
 371     def on_channels_clear(self, widget):
 372         for channel in self.output_channels:
 373             channel.unrealize()
 374             self.hbox_outputs.remove(channel.parent)
 375         for channel in self.channels:
 376             channel.unrealize()
 377             self.hbox_inputs.remove(channel.parent)
 378         self.channels = []
 379         self.output_channels = []
 380         self.channel_edit_input_menu = gtk.Menu()
 381         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 382         self.channel_edit_input_menu_item.set_sensitive(False)
 383         self.channel_remove_input_menu = gtk.Menu()
 384         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 385         self.channel_remove_input_menu_item.set_sensitive(False)
 386         self.channel_edit_output_menu = gtk.Menu()
 387         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 388         self.channel_edit_output_menu_item.set_sensitive(False)
 389         self.channel_remove_output_menu = gtk.Menu()
 390         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 391         self.channel_remove_output_menu_item.set_sensitive(False)
 392
 393     def add_channel(self, name, stereo, volume_cc, balance_cc):
 394         try:
 395             channel = InputChannel(self, name, stereo)
 396             self.add_channel_precreated(channel)
 397         except Exception:
 398             err = gtk.MessageDialog(self.window,
 399                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 400                             gtk.MESSAGE_ERROR,
 401                             gtk.BUTTONS_OK,
 402                             "Channel creation failed")
 403             err.run()
 404             err.destroy()
 405             return
 406         if volume_cc:
 407             channel.channel.volume_midi_cc = int(volume_cc)
 408         if balance_cc:
 409             channel.channel.balance_midi_cc = int(balance_cc)
 410         if not (volume_cc or balance_cc):
 411             channel.channel.autoset_midi_cc()
 412
 413         return channel
 414
 415     def add_channel_precreated(self, channel):
 416         frame = gtk.Frame()
 417         frame.add(channel)
 418         self.hbox_inputs.pack_start(frame, False)
 419         channel.realize()
 420
 421         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 422         self.channel_edit_input_menu.append(channel_edit_menu_item)
 423         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 424         self.channel_edit_input_menu_item.set_sensitive(True)
 425
 426         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 427         self.channel_remove_input_menu.append(channel_remove_menu_item)
 428         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 429         self.channel_remove_input_menu_item.set_sensitive(True)
 430
 431         self.channels.append(channel)
 432
 433         for outputchannel in self.output_channels:
 434             channel.add_control_group(outputchannel)
 435
 436         # create post fader output channel matching the input channel
 437         channel.post_fader_output_channel = self.mixer.add_output_channel(
 438                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 439         channel.post_fader_output_channel.volume = 0
 440         channel.post_fader_output_channel.set_solo(channel.channel, True)
 441
 442     def read_meters(self):
 443         for channel in self.channels:
 444             channel.read_meter()
 445         self.main_mix.read_meter()
 446         for channel in self.output_channels:
 447             channel.read_meter()
 448         return True
 449
 450     def midi_events_check(self):
 451         for channel in self.channels + [self.main_mix] + self.output_channels:
 452             channel.midi_events_check()
 453         return True
 454
 455     def add_output_channel(self, name, stereo, volume_cc, balance_cc, display_solo_buttons):
 456         try:
 457             channel = OutputChannel(self, name, stereo)
 458             channel.display_solo_buttons = display_solo_buttons
 459             self.add_output_channel_precreated(channel)
 460         except Exception:
 461             err = gtk.MessageDialog(self.window,
 462                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 463                             gtk.MESSAGE_ERROR,
 464                             gtk.BUTTONS_OK,
 465                             "Channel creation failed")
 466             err.run()
 467             err.destroy()
 468             return
 469         if volume_cc:
 470             channel.channel.volume_midi_cc = int(volume_cc)
 471         if balance_cc:
 472             channel.channel.balance_midi_cc = int(balance_cc)
 473         return channel
 474
 475     def add_output_channel_precreated(self, channel):
 476         frame = gtk.Frame()
 477         frame.add(channel)
 478         self.hbox_outputs.pack_start(frame, False)
 479         channel.realize()
 480
 481         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 482         self.channel_edit_output_menu.append(channel_edit_menu_item)
 483         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 484         self.channel_edit_output_menu_item.set_sensitive(True)
 485
 486         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 487         self.channel_remove_output_menu.append(channel_remove_menu_item)
 488         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 489         self.channel_remove_output_menu_item.set_sensitive(True)
 490
 491         self.output_channels.append(channel)
 492
 493     _monitored_channel = None
 494     def get_monitored_channel(self):
 495         return self._monitored_channel
 496
 497     def set_monitored_channel(self, channel):
 498         if self._monitored_channel:
 499             if channel.channel.name == self._monitored_channel.channel.name:
 500                 return
 501         self._monitored_channel = channel
 502         if type(channel) is InputChannel:
 503             # reset all solo/mute settings
 504             for in_channel in self.channels:
 505                 self.monitor_channel.set_solo(in_channel.channel, False)
 506                 self.monitor_channel.set_muted(in_channel.channel, False)
 507             self.monitor_channel.set_solo(channel.channel, True)
 508             self.monitor_channel.prefader = True
 509         else:
 510             self.monitor_channel.prefader = False
 511         self.update_monitor(channel)
 512     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 513
 514     def update_monitor(self, channel):
 515         if self.monitored_channel is not channel:
 516             return
 517         self.monitor_channel.volume = channel.channel.volume
 518         self.monitor_channel.balance = channel.channel.balance
 519         if type(self.monitored_channel) is OutputChannel:
 520             # sync solo/muted channels
 521             for input_channel in self.channels:
 522                 self.monitor_channel.set_solo(input_channel.channel,
 523                                 channel.channel.is_solo(input_channel.channel))
 524                 self.monitor_channel.set_muted(input_channel.channel,
 525                                 channel.channel.is_muted(input_channel.channel))
 526         elif type(self.monitored_channel) is MainMixChannel:
 527             # sync solo/muted channels
 528             for input_channel in self.channels:
 529                 self.monitor_channel.set_solo(input_channel.channel,
 530                                 input_channel.channel.solo)
 531                 self.monitor_channel.set_muted(input_channel.channel,
 532                                 input_channel.channel.mute)
 533
 534     def get_input_channel_by_name(self, name):
 535         for input_channel in self.channels:
 536             if input_channel.channel.name == name:
 537                 return input_channel
 538         return None
 539
 540     def on_about(self, *args):
 541         about = gtk.AboutDialog()
 542         about.set_name('jack_mixer')
 543         about.set_copyright('Copyright © 2006-2010\nNedko Arnaudov, Frederic Peters, Arnout Engelen')
 544         about.set_license('''\
 545 jack_mixer is free software; you can redistribute it and/or modify it
 546 under the terms of the GNU General Public License as published by the
 547 Free Software Foundation; either version 2 of the License, or (at your
 548 option) any later version.
 549
 550 jack_mixer is distributed in the hope that it will be useful, but
 551 WITHOUT ANY WARRANTY; without even the implied warranty of
 552 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 553 General Public License for more details.
 554
 555 You should have received a copy of the GNU General Public License along
 556 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 557 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 558         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 559                            'Frederic Peters <fpeters@0d.be>'])
 560         about.set_logo_icon_name('jack_mixer')
 561         about.set_website('http://home.gna.org/jackmixer/')
 562
 563         about.run()
 564         about.destroy()
 565
 566     def lash_check_events(self):
 567         if self.save:
 568             self.save = False
 569             if self.current_filename:
 570                 print "saving on SIGUSR1 request"
 571                 self.on_save_cb()
 572                 print "save done"
 573             else:
 574                 print "not saving because filename is not known"
 575             return True
 576
 577         if not self.lash_client:
 578             return True
 579
 580         while lash.lash_get_pending_event_count(self.lash_client):
 581             event = lash.lash_get_event(self.lash_client)
 582
 583             #print repr(event)
 584
 585             event_type = lash.lash_event_get_type(event)
 586             if event_type == lash.LASH_Quit:
 587                 print "jack_mixer: LASH ordered quit."
 588                 gtk.main_quit()
 589                 return False
 590             elif event_type == lash.LASH_Save_File:
 591                 directory = lash.lash_event_get_string(event)
 592                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 593                 filename = directory + os.sep + "jack_mixer.xml"
 594                 f = file(filename, "w")
 595                 self.save_to_xml(f)
 596                 f.close()
 597                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 598             elif event_type == lash.LASH_Restore_File:
 599                 directory = lash.lash_event_get_string(event)
 600                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 601                 filename = directory + os.sep + "jack_mixer.xml"
 602                 f = file(filename, "r")
 603                 self.load_from_xml(f, silence_errors=True)
 604                 f.close()
 605                 lash.lash_send_event(self.lash_client, event)
 606             else:
 607                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 608                 return True
 609
 610             #lash.lash_event_destroy(event)
 611
 612         return True
 613
 614     def save_to_xml(self, file):
 615         #print "Saving to XML..."
 616         b = XmlSerialization()
 617         s = Serializator()
 618         s.serialize(self, b)
 619         b.save(file)
 620
 621     def load_from_xml(self, file, silence_errors=False):
 622         #print "Loading from XML..."
 623         self.on_channels_clear(None)
 624         self.unserialized_channels = []
 625         b = XmlSerialization()
 626         try:
 627             b.load(file)
 628         except:
 629             if silence_errors:
 630                 return
 631             raise
 632         s = Serializator()
 633         s.unserialize(self, b)
 634         for channel in self.unserialized_channels:
 635             if isinstance(channel, InputChannel):
 636                 self.add_channel_precreated(channel)
 637         for channel in self.unserialized_channels:
 638             if isinstance(channel, OutputChannel):
 639                 self.add_output_channel_precreated(channel)
 640         del self.unserialized_channels
 641         self.window.show_all()
 642
 643     def serialize(self, object_backend):
 644         object_backend.add_property('geometry',
 645                         '%sx%s' % (self.window.allocation.width, self.window.allocation.height))
 646
 647     def unserialize_property(self, name, value):
 648         if name == 'geometry':
 649             width, height = value.split('x')
 650             self.window.resize(int(width), int(height))
 651             return True
 652
 653     def unserialize_child(self, name):
 654         if name == MainMixChannel.serialization_name():
 655             return self.main_mix
 656
 657         if name == InputChannel.serialization_name():
 658             channel = InputChannel(self, "", True)
 659             self.unserialized_channels.append(channel)
 660             return channel
 661
 662         if name == OutputChannel.serialization_name():
 663             channel = OutputChannel(self, "", True)
 664             self.unserialized_channels.append(channel)
 665             return channel
 666
 667     def serialization_get_childs(self):
 668         '''Get child objects tha required and support serialization'''
 669         childs = self.channels[:] + self.output_channels[:]
 670         childs.append(self.main_mix)
 671         return childs
 672
 673     def serialization_name(self):
 674         return "jack_mixer"
 675
 676     def main(self):
 677         self.main_mix.realize()
 678         self.main_mix.set_monitored()
 679
 680         if not self.mixer:
 681             return
 682
 683         self.window.show_all()
 684
 685         signal.signal(signal.SIGUSR1, self.sighandler)
 686         signal.signal(signal.SIGTERM, self.sighandler)
 687         signal.signal(signal.SIGINT, self.sighandler)
 688
 689         gtk.main()
 690
 691         #f = file("/dev/stdout", "w")
 692         #self.save_to_xml(f)
 693         #f.close
 694
 695 def help():
 696     print "Usage: %s [mixer_name]" % sys.argv[0]
 697
 698 def main():
 699     # Connect to LASH if Python bindings are available, and the user did not
 700     # pass --no-lash
 701     if lash and not '--no-lash' in sys.argv:
 702         # sys.argv is modified by this call
 703         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 704     else:
 705         lash_client = None
 706
 707     parser = OptionParser(usage='usage: %prog [options] [jack_client_name]')
 708     parser.add_option('-c', '--config', dest='config',
 709                       help='use a non default configuration file')
 710     # --no-lash here is not acted upon, it is specified for completeness when
 711     # --help is passed.
 712     parser.add_option('--no-lash', dest='nolash', action='store_true',
 713                       help='do not connect to LASH')
 714     options, args = parser.parse_args()
 715
 716     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 717     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 718     if lash_client:
 719         server_name = lash.lash_get_server_name(lash_client)
 720         if server_name:
 721             print "Successfully connected to LASH server at " + server_name
 722         else:
 723             # getting the server name failed, probably not worth trying to do
 724             # further things with as a lash client.
 725             lash_client = None
 726
 727     if len(args) == 1:
 728         name = args[0]
 729     else:
 730         name = None
 731
 732     if not name:
 733         name = "jack_mixer"
 734
 735     try:
 736         mixer = JackMixer(name, lash_client)
 737     except Exception, e:
 738         err = gtk.MessageDialog(None,
 739                             gtk.DIALOG_MODAL,
 740                             gtk.MESSAGE_ERROR,
 741                             gtk.BUTTONS_OK,
 742                             "Mixer creation failed (%s)" % str(e))
 743         err.run()
 744         err.destroy()
 745         sys.exit(1)
 746
 747     if options.config:
 748         f = file(options.config)
 749         mixer.current_filename = options.config
 750         try:
 751             mixer.load_from_xml(f)
 752         except:
 753             err = gtk.MessageDialog(mixer.window,
 754                             gtk.DIALOG_MODAL,
 755                             gtk.MESSAGE_ERROR,
 756                             gtk.BUTTONS_OK,
 757                             "Failed loading settings.")
 758             err.run()
 759             err.destroy()
 760         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 761         f.close()
 762
 763     mixer.main()
 764
 765     mixer.cleanup()
 766
 767 if __name__ == "__main__":
 768     main()