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     def sighandler(self, signum, frame):
 205         #print "Signal %d received" % signum
 206         if signum == signal.SIGUSR1:
 207             self.save = True
 208         elif signum == signal.SIGTERM:
 209             gtk.main_quit()
 210         elif signum == signal.SIGINT:
 211             gtk.main_quit()
 212         else:
 213             print "Unknown signal %d received" % signum
 214
 215     def cleanup(self):
 216         print "Cleaning jack_mixer"
 217         if not self.mixer:
 218             return
 219
 220         for channel in self.channels:
 221             channel.unrealize()
 222
 223     def on_open_cb(self, *args):
 224         dlg = gtk.FileChooserDialog(title='Open', parent=self.window,
 225                         action=gtk.FILE_CHOOSER_ACTION_OPEN,
 226                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 227                                  gtk.STOCK_OPEN, gtk.RESPONSE_OK))
 228         dlg.set_default_response(gtk.RESPONSE_OK)
 229         if dlg.run() == gtk.RESPONSE_OK:
 230             filename = dlg.get_filename()
 231             try:
 232                 f = file(filename, 'r')
 233                 self.load_from_xml(f)
 234             except:
 235                 err = gtk.MessageDialog(self.window,
 236                             gtk.DIALOG_MODAL,
 237                             gtk.MESSAGE_ERROR,
 238                             gtk.BUTTONS_OK,
 239                             "Failed loading settings.")
 240                 err.run()
 241                 err.destroy()
 242             else:
 243                 self.current_filename = filename
 244             finally:
 245                 f.close()
 246         dlg.destroy()
 247
 248     def on_save_cb(self, *args):
 249         if not self.current_filename:
 250             return self.on_save_as_cb()
 251         f = file(self.current_filename, 'w')
 252         self.save_to_xml(f)
 253         f.close()
 254
 255     def on_save_as_cb(self, *args):
 256         dlg = gtk.FileChooserDialog(title='Save', parent=self.window,
 257                         action=gtk.FILE_CHOOSER_ACTION_SAVE,
 258                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 259                                  gtk.STOCK_SAVE, gtk.RESPONSE_OK))
 260         dlg.set_default_response(gtk.RESPONSE_OK)
 261         if dlg.run() == gtk.RESPONSE_OK:
 262             self.current_filename = dlg.get_filename()
 263             self.on_save_cb()
 264         dlg.destroy()
 265
 266     def on_quit_cb(self, *args):
 267         gtk.main_quit()
 268
 269     preferences_dialog = None
 270     def on_preferences_cb(self, widget):
 271         if not self.preferences_dialog:
 272             self.preferences_dialog = PreferencesDialog(self)
 273         self.preferences_dialog.show()
 274         self.preferences_dialog.present()
 275
 276     def on_add_input_channel(self, widget):
 277         dialog = NewChannelDialog(app=self)
 278         dialog.set_transient_for(self.window)
 279         dialog.show()
 280         ret = dialog.run()
 281         dialog.hide()
 282
 283         if ret == gtk.RESPONSE_OK:
 284             result = dialog.get_result()
 285             channel = self.add_channel(**result)
 286             self.window.show_all()
 287
 288     def on_add_output_channel(self, widget):
 289         dialog = NewOutputChannelDialog(app=self)
 290         dialog.set_transient_for(self.window)
 291         dialog.show()
 292         ret = dialog.run()
 293         dialog.hide()
 294
 295         if ret == gtk.RESPONSE_OK:
 296             result = dialog.get_result()
 297             channel = self.add_output_channel(**result)
 298             self.window.show_all()
 299
 300     def on_edit_input_channel(self, widget, channel):
 301         print 'Editing channel "%s"' % channel.channel_name
 302         channel.on_channel_properties()
 303
 304     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 305         if (widget.get_label() == label):
 306             self.channel_edit_input_menu.remove(widget)
 307
 308     def on_remove_input_channel(self, widget, channel):
 309         print 'Removing channel "%s"' % channel.channel_name
 310         self.channel_remove_input_menu.remove(widget)
 311         self.channel_edit_input_menu.foreach(
 312             self.remove_channel_edit_input_menuitem_by_label,
 313             channel.channel_name);
 314         if self.monitored_channel is channel:
 315             channel.monitor_button.set_active(False)
 316         for i in range(len(self.channels)):
 317             if self.channels[i] is channel:
 318                 channel.unrealize()
 319                 del self.channels[i]
 320                 self.hbox_inputs.remove(channel.parent)
 321                 break
 322         if len(self.channels) == 0:
 323             self.channel_remove_input_menu_item.set_sensitive(False)
 324
 325     def on_edit_output_channel(self, widget, channel):
 326         print 'Editing channel "%s"' % channel.channel_name
 327         channel.on_channel_properties()
 328
 329     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 330         if (widget.get_label() == label):
 331             self.channel_edit_output_menu.remove(widget)
 332
 333     def on_remove_output_channel(self, widget, channel):
 334         print 'Removing channel "%s"' % channel.channel_name
 335         self.channel_remove_output_menu.remove(widget)
 336         self.channel_edit_output_menu.foreach(
 337             self.remove_channel_edit_output_menuitem_by_label,
 338             channel.channel_name);
 339         if self.monitored_channel is channel:
 340             channel.monitor_button.set_active(False)
 341         for i in range(len(self.channels)):
 342             if self.output_channels[i] is channel:
 343                 channel.unrealize()
 344                 del self.output_channels[i]
 345                 self.hbox_outputs.remove(channel.parent)
 346                 break
 347         if len(self.output_channels) == 0:
 348             self.channel_remove_output_menu_item.set_sensitive(False)
 349
 350     def rename_channels(self, container, parameters):
 351         if (container.get_label() == parameters['oldname']):
 352             container.set_label(parameters['newname'])
 353
 354     def on_channel_rename(self, oldname, newname):
 355         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 356         self.channel_edit_input_menu.foreach(self.rename_channels,
 357             rename_parameters)
 358         self.channel_edit_output_menu.foreach(self.rename_channels,
 359             rename_parameters)
 360         self.channel_remove_input_menu.foreach(self.rename_channels,
 361             rename_parameters)
 362         self.channel_remove_output_menu.foreach(self.rename_channels,
 363             rename_parameters)
 364         print "Renaming channel from %s to %s\n" % (oldname, newname)
 365
 366
 367     def on_channels_clear(self, widget):
 368         for channel in self.output_channels:
 369             channel.unrealize()
 370             self.hbox_outputs.remove(channel.parent)
 371         for channel in self.channels:
 372             channel.unrealize()
 373             self.hbox_inputs.remove(channel.parent)
 374         self.channels = []
 375         self.output_channels = []
 376         self.channel_edit_input_menu = gtk.Menu()
 377         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 378         self.channel_edit_input_menu_item.set_sensitive(False)
 379         self.channel_remove_input_menu = gtk.Menu()
 380         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 381         self.channel_remove_input_menu_item.set_sensitive(False)
 382         self.channel_edit_output_menu = gtk.Menu()
 383         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 384         self.channel_edit_output_menu_item.set_sensitive(False)
 385         self.channel_remove_output_menu = gtk.Menu()
 386         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 387         self.channel_remove_output_menu_item.set_sensitive(False)
 388
 389     def add_channel(self, name, stereo, volume_cc, balance_cc):
 390         try:
 391             channel = InputChannel(self, name, stereo)
 392             self.add_channel_precreated(channel)
 393         except Exception:
 394             err = gtk.MessageDialog(self.window,
 395                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 396                             gtk.MESSAGE_ERROR,
 397                             gtk.BUTTONS_OK,
 398                             "Channel creation failed")
 399             err.run()
 400             err.destroy()
 401             return
 402         if volume_cc:
 403             channel.channel.volume_midi_cc = int(volume_cc)
 404         if balance_cc:
 405             channel.channel.balance_midi_cc = int(balance_cc)
 406         if not (volume_cc or balance_cc):
 407             channel.channel.autoset_midi_cc()
 408
 409         return channel
 410
 411     def add_channel_precreated(self, channel):
 412         frame = gtk.Frame()
 413         frame.add(channel)
 414         self.hbox_inputs.pack_start(frame, False)
 415         channel.realize()
 416
 417         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 418         self.channel_edit_input_menu.append(channel_edit_menu_item)
 419         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 420         self.channel_edit_input_menu_item.set_sensitive(True)
 421
 422         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 423         self.channel_remove_input_menu.append(channel_remove_menu_item)
 424         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 425         self.channel_remove_input_menu_item.set_sensitive(True)
 426
 427         self.channels.append(channel)
 428
 429         for outputchannel in self.output_channels:
 430             channel.add_control_group(outputchannel)
 431
 432         # create post fader output channel matching the input channel
 433         channel.post_fader_output_channel = self.mixer.add_output_channel(
 434                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 435         channel.post_fader_output_channel.volume = 0
 436         channel.post_fader_output_channel.set_solo(channel.channel, True)
 437
 438     def read_meters(self):
 439         for channel in self.channels:
 440             channel.read_meter()
 441         self.main_mix.read_meter()
 442         for channel in self.output_channels:
 443             channel.read_meter()
 444         return True
 445
 446     def add_output_channel(self, name, stereo, volume_cc, balance_cc, display_solo_buttons):
 447         try:
 448             channel = OutputChannel(self, name, stereo)
 449             channel.display_solo_buttons = display_solo_buttons
 450             self.add_output_channel_precreated(channel)
 451         except Exception:
 452             err = gtk.MessageDialog(self.window,
 453                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 454                             gtk.MESSAGE_ERROR,
 455                             gtk.BUTTONS_OK,
 456                             "Channel creation failed")
 457             err.run()
 458             err.destroy()
 459             return
 460         if volume_cc:
 461             channel.channel.volume_midi_cc = int(volume_cc)
 462         if balance_cc:
 463             channel.channel.balance_midi_cc = int(balance_cc)
 464         return channel
 465
 466     def add_output_channel_precreated(self, channel):
 467         frame = gtk.Frame()
 468         frame.add(channel)
 469         self.hbox_outputs.pack_start(frame, False)
 470         channel.realize()
 471
 472         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 473         self.channel_edit_output_menu.append(channel_edit_menu_item)
 474         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 475         self.channel_edit_output_menu_item.set_sensitive(True)
 476
 477         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 478         self.channel_remove_output_menu.append(channel_remove_menu_item)
 479         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 480         self.channel_remove_output_menu_item.set_sensitive(True)
 481
 482         self.output_channels.append(channel)
 483
 484     _monitored_channel = None
 485     def get_monitored_channel(self):
 486         return self._monitored_channel
 487
 488     def set_monitored_channel(self, channel):
 489         if self._monitored_channel:
 490             if channel.channel.name == self._monitored_channel.channel.name:
 491                 return
 492         self._monitored_channel = channel
 493         if type(channel) is InputChannel:
 494             # reset all solo/mute settings
 495             for in_channel in self.channels:
 496                 self.monitor_channel.set_solo(in_channel.channel, False)
 497                 self.monitor_channel.set_muted(in_channel.channel, False)
 498             self.monitor_channel.set_solo(channel.channel, True)
 499             self.monitor_channel.prefader = True
 500         else:
 501             self.monitor_channel.prefader = False
 502         self.update_monitor(channel)
 503     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 504
 505     def update_monitor(self, channel):
 506         if self.monitored_channel is not channel:
 507             return
 508         self.monitor_channel.volume = channel.channel.volume
 509         self.monitor_channel.balance = channel.channel.balance
 510         if type(self.monitored_channel) is OutputChannel:
 511             # sync solo/muted channels
 512             for input_channel in self.channels:
 513                 self.monitor_channel.set_solo(input_channel.channel,
 514                                 channel.channel.is_solo(input_channel.channel))
 515                 self.monitor_channel.set_muted(input_channel.channel,
 516                                 channel.channel.is_muted(input_channel.channel))
 517         elif type(self.monitored_channel) is MainMixChannel:
 518             # sync solo/muted channels
 519             for input_channel in self.channels:
 520                 self.monitor_channel.set_solo(input_channel.channel,
 521                                 input_channel.channel.solo)
 522                 self.monitor_channel.set_muted(input_channel.channel,
 523                                 input_channel.channel.mute)
 524
 525     def get_input_channel_by_name(self, name):
 526         for input_channel in self.channels:
 527             if input_channel.channel.name == name:
 528                 return input_channel
 529         return None
 530
 531     def on_about(self, *args):
 532         about = gtk.AboutDialog()
 533         about.set_name('jack_mixer')
 534         about.set_copyright('Copyright © 2006-2009\nNedko Arnaudov, Frederic Peters')
 535         about.set_license('''\
 536 jack_mixer is free software; you can redistribute it and/or modify it
 537 under the terms of the GNU General Public License as published by the
 538 Free Software Foundation; either version 2 of the License, or (at your
 539 option) any later version.
 540
 541 jack_mixer is distributed in the hope that it will be useful, but
 542 WITHOUT ANY WARRANTY; without even the implied warranty of
 543 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 544 General Public License for more details.
 545
 546 You should have received a copy of the GNU General Public License along
 547 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 548 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 549         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 550                            'Frederic Peters <fpeters@0d.be>'])
 551         about.set_logo_icon_name('jack_mixer')
 552         about.set_website('http://home.gna.org/jackmixer/')
 553
 554         about.run()
 555         about.destroy()
 556
 557     def lash_check_events(self):
 558         if self.save:
 559             self.save = False
 560             if self.current_filename:
 561                 print "saving on SIGUSR1 request"
 562                 self.on_save_cb()
 563                 print "save done"
 564             else:
 565                 print "not saving because filename is not known"
 566             return True
 567
 568         if not self.lash_client:
 569             return True
 570
 571         while lash.lash_get_pending_event_count(self.lash_client):
 572             event = lash.lash_get_event(self.lash_client)
 573
 574             #print repr(event)
 575
 576             event_type = lash.lash_event_get_type(event)
 577             if event_type == lash.LASH_Quit:
 578                 print "jack_mixer: LASH ordered quit."
 579                 gtk.main_quit()
 580                 return False
 581             elif event_type == lash.LASH_Save_File:
 582                 directory = lash.lash_event_get_string(event)
 583                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 584                 filename = directory + os.sep + "jack_mixer.xml"
 585                 f = file(filename, "w")
 586                 self.save_to_xml(f)
 587                 f.close()
 588                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 589             elif event_type == lash.LASH_Restore_File:
 590                 directory = lash.lash_event_get_string(event)
 591                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 592                 filename = directory + os.sep + "jack_mixer.xml"
 593                 f = file(filename, "r")
 594                 self.load_from_xml(f, silence_errors=True)
 595                 f.close()
 596                 lash.lash_send_event(self.lash_client, event)
 597             else:
 598                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 599                 return True
 600
 601             #lash.lash_event_destroy(event)
 602
 603         return True
 604
 605     def save_to_xml(self, file):
 606         #print "Saving to XML..."
 607         b = XmlSerialization()
 608         s = Serializator()
 609         s.serialize(self, b)
 610         b.save(file)
 611
 612     def load_from_xml(self, file, silence_errors=False):
 613         #print "Loading from XML..."
 614         self.on_channels_clear(None)
 615         self.unserialized_channels = []
 616         b = XmlSerialization()
 617         try:
 618             b.load(file)
 619         except:
 620             if silence_errors:
 621                 return
 622             raise
 623         s = Serializator()
 624         s.unserialize(self, b)
 625         for channel in self.unserialized_channels:
 626             if isinstance(channel, InputChannel):
 627                 self.add_channel_precreated(channel)
 628         for channel in self.unserialized_channels:
 629             if isinstance(channel, OutputChannel):
 630                 self.add_output_channel_precreated(channel)
 631         del self.unserialized_channels
 632         self.window.show_all()
 633
 634     def serialize(self, object_backend):
 635         object_backend.add_property('geometry',
 636                         '%sx%s' % (self.window.allocation.width, self.window.allocation.height))
 637
 638     def unserialize_property(self, name, value):
 639         if name == 'geometry':
 640             width, height = value.split('x')
 641             self.window.resize(int(width), int(height))
 642             return True
 643
 644     def unserialize_child(self, name):
 645         if name == MainMixChannel.serialization_name():
 646             return self.main_mix
 647
 648         if name == InputChannel.serialization_name():
 649             channel = InputChannel(self, "", True)
 650             self.unserialized_channels.append(channel)
 651             return channel
 652
 653         if name == OutputChannel.serialization_name():
 654             channel = OutputChannel(self, "", True)
 655             self.unserialized_channels.append(channel)
 656             return channel
 657
 658     def serialization_get_childs(self):
 659         '''Get child objects tha required and support serialization'''
 660         childs = self.channels[:] + self.output_channels[:]
 661         childs.append(self.main_mix)
 662         return childs
 663
 664     def serialization_name(self):
 665         return "jack_mixer"
 666
 667     def main(self):
 668         self.main_mix.realize()
 669         self.main_mix.set_monitored()
 670
 671         if not self.mixer:
 672             return
 673
 674         self.window.show_all()
 675
 676         signal.signal(signal.SIGUSR1, self.sighandler)
 677         signal.signal(signal.SIGTERM, self.sighandler)
 678         signal.signal(signal.SIGINT, self.sighandler)
 679
 680         gtk.main()
 681
 682         #f = file("/dev/stdout", "w")
 683         #self.save_to_xml(f)
 684         #f.close
 685
 686 def help():
 687     print "Usage: %s [mixer_name]" % sys.argv[0]
 688
 689 def main():
 690     # Connect to LASH if Python bindings are available, and the user did not
 691     # pass --no-lash
 692     if lash and not '--no-lash' in sys.argv:
 693         # sys.argv is modified by this call
 694         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 695     else:
 696         lash_client = None
 697
 698     parser = OptionParser()
 699     parser.add_option('-c', '--config', dest='config',
 700                       help='use a non default configuration file')
 701     # --no-lash here is not acted upon, it is specified for completeness when
 702     # --help is passed.
 703     parser.add_option('--no-lash', dest='nolash', action='store_true',
 704                       help='do not connect to LASH')
 705     options, args = parser.parse_args()
 706
 707     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 708     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 709     if lash_client:
 710         print "Successfully connected to LASH server at " +  lash.lash_get_server_name(lash_client)
 711
 712     if len(args) == 1:
 713         name = args[0]
 714     else:
 715         name = None
 716
 717     if not name:
 718         name = "jack_mixer"
 719
 720     gtk.gdk.threads_init() # if this function is called, when SIGUSR1 is received, we enter tight loop...
 721     try:
 722         mixer = JackMixer(name, lash_client)
 723     except Exception, e:
 724         err = gtk.MessageDialog(None,
 725                             gtk.DIALOG_MODAL,
 726                             gtk.MESSAGE_ERROR,
 727                             gtk.BUTTONS_OK,
 728                             "Mixer creation failed (%s)" % str(e))
 729         err.run()
 730         err.destroy()
 731         sys.exit(1)
 732
 733     if options.config:
 734         f = file(options.config)
 735         mixer.current_filename = options.config
 736         try:
 737             mixer.load_from_xml(f)
 738         except:
 739             err = gtk.MessageDialog(mixer.window,
 740                             gtk.DIALOG_MODAL,
 741                             gtk.MESSAGE_ERROR,
 742                             gtk.BUTTONS_OK,
 743                             "Failed loading settings.")
 744             err.run()
 745             err.destroy()
 746         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 747         f.close()
 748
 749     mixer.main()
 750
 751     mixer.cleanup()
 752
 753 if __name__ == "__main__":
 754     main()