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
  42 import jack_mixer_c
  43
  44
  45 import scale
  46 from channel import *
  47
  48 import gui
  49 from preferences import PreferencesDialog
  50
  51 from serialization_xml import XmlSerialization
  52 from serialization import SerializedObject, Serializator
  53
  54 # restore Python modules lookup path
  55 sys.path = old_path
  56
  57
  58 class TrayIcon(gtk.StatusIcon):
  59     mixer = None
  60
  61     def __init__(self, mixer):
  62         gtk.StatusIcon.__init__(self)
  63         self.mixer = mixer
  64         self.set_from_icon_name( mixer.window.get_icon_name() )
  65         self.set_tooltip('Jack Mixer ('+mixer.mixer.client_name()+')')
  66         self.set_visible(True)
  67
  68         self.menu = menu = gtk.Menu()
  69
  70         window_item = gtk.MenuItem("Show Mixer")
  71         window_item.connect("activate", self.show_window, "Jack Mixer")
  72         menu.append(window_item)
  73
  74         menu.append(gtk.SeparatorMenuItem())
  75
  76         quit_item = gtk.MenuItem("Quit")
  77         quit_item.connect("activate", self.mixer.on_quit_cb, "quit")
  78         menu.append(quit_item)
  79         menu.show_all()
  80
  81         self.connect("activate", self.show_window)
  82         self.connect('popup-menu', self.icon_clicked)
  83
  84     def show_window(self, widget, event=None):
  85         if self.mixer.window.get_property("visible"):
  86             self.mixer.window.hide()
  87         else:
  88             self.mixer.window.present()
  89
  90     def icon_clicked(self, status, button, time):
  91         self.menu.popup(None, None, None, button, time)
  92
  93
  94
  95 class JackMixer(SerializedObject):
  96
  97     # scales suitable as meter scales
  98     meter_scales = [scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  99
 100     # scales suitable as volume slider scales
 101     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
 102
 103     # name of settngs file that is currently open
 104     current_filename = None
 105
 106     def __init__(self, name, lash_client):
 107         self.mixer = jack_mixer_c.Mixer(name)
 108         if not self.mixer:
 109             return
 110         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
 111
 112         self.save = False
 113
 114         if lash_client:
 115             # Send our client name to server
 116             lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
 117             lash.lash_event_set_string(lash_event, name)
 118             lash.lash_send_event(lash_client, lash_event)
 119
 120             lash.lash_jack_client_name(lash_client, name)
 121
 122         self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
 123         if name != self.mixer.client_name():
 124             self.window.set_title(name + " ("+ self.mixer.client_name()+")" )
 125         else:
 126             self.window.set_title(name)
 127
 128         self.window.set_icon_name('jack_mixer')
 129         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
 130
 131         self.vbox_top = gtk.VBox()
 132         self.window.add(self.vbox_top)
 133
 134         self.menubar = gtk.MenuBar()
 135         self.vbox_top.pack_start(self.menubar, False)
 136
 137         mixer_menu_item = gtk.MenuItem("_Mixer")
 138         self.menubar.append(mixer_menu_item)
 139         edit_menu_item = gtk.MenuItem('_Edit')
 140         self.menubar.append(edit_menu_item)
 141         help_menu_item = gtk.MenuItem('_Help')
 142         self.menubar.append(help_menu_item)
 143
 144         self.window.set_default_size(120, 300)
 145
 146         mixer_menu = gtk.Menu()
 147         mixer_menu_item.set_submenu(mixer_menu)
 148
 149         add_input_channel = gtk.ImageMenuItem('New _Input Channel')
 150         mixer_menu.append(add_input_channel)
 151         add_input_channel.connect("activate", self.on_add_input_channel)
 152
 153         add_output_channel = gtk.ImageMenuItem('New _Output Channel')
 154         mixer_menu.append(add_output_channel)
 155         add_output_channel.connect("activate", self.on_add_output_channel)
 156
 157         mixer_menu.append(gtk.SeparatorMenuItem())
 158         open = gtk.ImageMenuItem(gtk.STOCK_OPEN)
 159         mixer_menu.append(open)
 160         open.connect('activate', self.on_open_cb)
 161         save = gtk.ImageMenuItem(gtk.STOCK_SAVE)
 162         mixer_menu.append(save)
 163         save.connect('activate', self.on_save_cb)
 164         save_as = gtk.ImageMenuItem(gtk.STOCK_SAVE_AS)
 165         mixer_menu.append(save_as)
 166         save_as.connect('activate', self.on_save_as_cb)
 167
 168         mixer_menu.append(gtk.SeparatorMenuItem())
 169
 170         quit = gtk.ImageMenuItem(gtk.STOCK_QUIT)
 171         mixer_menu.append(quit)
 172         quit.connect('activate', self.on_quit_cb)
 173
 174         edit_menu = gtk.Menu()
 175         edit_menu_item.set_submenu(edit_menu)
 176
 177         self.channel_edit_input_menu_item = gtk.MenuItem('_Edit Input Channel')
 178         edit_menu.append(self.channel_edit_input_menu_item)
 179         self.channel_edit_input_menu = gtk.Menu()
 180         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 181
 182         self.channel_edit_output_menu_item = gtk.MenuItem('Edit _Output Channel')
 183         edit_menu.append(self.channel_edit_output_menu_item)
 184         self.channel_edit_output_menu = gtk.Menu()
 185         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 186
 187         self.channel_remove_input_menu_item = gtk.MenuItem('Remove _Input Channel')
 188         edit_menu.append(self.channel_remove_input_menu_item)
 189         self.channel_remove_input_menu = gtk.Menu()
 190         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 191
 192         self.channel_remove_output_menu_item = gtk.MenuItem('_Remove Output Channel')
 193         edit_menu.append(self.channel_remove_output_menu_item)
 194         self.channel_remove_output_menu = gtk.Menu()
 195         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 196
 197         channel_remove_all_menu_item = gtk.ImageMenuItem(gtk.STOCK_CLEAR)
 198         edit_menu.append(channel_remove_all_menu_item)
 199         channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
 200
 201         edit_menu.append(gtk.SeparatorMenuItem())
 202
 203         preferences = gtk.ImageMenuItem(gtk.STOCK_PREFERENCES)
 204         preferences.connect('activate', self.on_preferences_cb)
 205         edit_menu.append(preferences)
 206
 207         help_menu = gtk.Menu()
 208         help_menu_item.set_submenu(help_menu)
 209
 210         about = gtk.ImageMenuItem(gtk.STOCK_ABOUT)
 211         help_menu.append(about)
 212         about.connect("activate", self.on_about)
 213
 214         self.hbox_top = gtk.HBox()
 215         self.vbox_top.pack_start(self.hbox_top, True)
 216
 217         self.scrolled_window = gtk.ScrolledWindow()
 218         self.hbox_top.pack_start(self.scrolled_window, True)
 219
 220         self.hbox_inputs = gtk.HBox()
 221         self.hbox_inputs.set_spacing(0)
 222         self.hbox_inputs.set_border_width(0)
 223         self.hbox_top.set_spacing(0)
 224         self.hbox_top.set_border_width(0)
 225         self.channels = []
 226         self.output_channels = []
 227
 228         self.scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
 229         self.scrolled_window.add_with_viewport(self.hbox_inputs)
 230
 231         self.main_mix = MainMixChannel(self)
 232         self.hbox_outputs = gtk.HBox()
 233         self.hbox_outputs.set_spacing(0)
 234         self.hbox_outputs.set_border_width(0)
 235         frame = gtk.Frame()
 236         frame.add(self.main_mix)
 237         self.hbox_outputs.pack_start(frame, False)
 238         self.hbox_top.pack_start(self.hbox_outputs, False)
 239
 240         self.window.connect("destroy", gtk.main_quit)
 241
 242         self.trayicon = TrayIcon(self)
 243         self.window.connect('delete-event', self.on_delete_event)
 244
 245         gobject.timeout_add(80, self.read_meters)
 246         self.lash_client = lash_client
 247
 248         gobject.timeout_add(200, self.lash_check_events)
 249
 250         gobject.timeout_add(50, self.midi_events_check)
 251
 252
 253     def on_delete_event(self, widget, event):
 254        if self.gui_factory.get_minimize_to_tray():
 255             self.window.hide()
 256             return True
 257        else:
 258            self.on_quit_cb()
 259            return False
 260
 261
 262     def sighandler(self, signum, frame):
 263         #print "Signal %d received" % signum
 264         if signum == signal.SIGUSR1:
 265             self.save = True
 266         elif signum == signal.SIGTERM:
 267             gtk.main_quit()
 268         elif signum == signal.SIGINT:
 269             gtk.main_quit()
 270         else:
 271             print "Unknown signal %d received" % signum
 272
 273     def cleanup(self):
 274         print "Cleaning jack_mixer"
 275         if not self.mixer:
 276             return
 277
 278         for channel in self.channels:
 279             channel.unrealize()
 280
 281         self.mixer.destroy()
 282
 283     def on_open_cb(self, *args):
 284         dlg = gtk.FileChooserDialog(title='Open', parent=self.window,
 285                         action=gtk.FILE_CHOOSER_ACTION_OPEN,
 286                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 287                                  gtk.STOCK_OPEN, gtk.RESPONSE_OK))
 288         dlg.set_default_response(gtk.RESPONSE_OK)
 289         if dlg.run() == gtk.RESPONSE_OK:
 290             filename = dlg.get_filename()
 291             try:
 292                 f = file(filename, 'r')
 293                 self.load_from_xml(f)
 294             except:
 295                 err = gtk.MessageDialog(self.window,
 296                             gtk.DIALOG_MODAL,
 297                             gtk.MESSAGE_ERROR,
 298                             gtk.BUTTONS_OK,
 299                             "Failed loading settings.")
 300                 err.run()
 301                 err.destroy()
 302             else:
 303                 self.current_filename = filename
 304             finally:
 305                 f.close()
 306         dlg.destroy()
 307
 308     def on_save_cb(self, *args):
 309         if not self.current_filename:
 310             return self.on_save_as_cb()
 311         f = file(self.current_filename, 'w')
 312         self.save_to_xml(f)
 313         f.close()
 314
 315     def on_save_as_cb(self, *args):
 316         dlg = gtk.FileChooserDialog(title='Save', parent=self.window,
 317                         action=gtk.FILE_CHOOSER_ACTION_SAVE,
 318                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
 319                                  gtk.STOCK_SAVE, gtk.RESPONSE_OK))
 320         dlg.set_default_response(gtk.RESPONSE_OK)
 321         if dlg.run() == gtk.RESPONSE_OK:
 322             self.current_filename = dlg.get_filename()
 323             self.on_save_cb()
 324         dlg.destroy()
 325
 326     def on_quit_cb(self, *args):
 327         gtk.main_quit()
 328
 329     preferences_dialog = None
 330     def on_preferences_cb(self, widget):
 331         if not self.preferences_dialog:
 332             self.preferences_dialog = PreferencesDialog(self)
 333         self.preferences_dialog.show()
 334         self.preferences_dialog.present()
 335
 336     def on_add_input_channel(self, widget):
 337         dialog = NewChannelDialog(app=self)
 338         dialog.set_transient_for(self.window)
 339         dialog.show()
 340         ret = dialog.run()
 341         dialog.hide()
 342
 343         if ret == gtk.RESPONSE_OK:
 344             result = dialog.get_result()
 345             channel = self.add_channel(**result)
 346             self.window.show_all()
 347
 348     def on_add_output_channel(self, widget):
 349         dialog = NewOutputChannelDialog(app=self)
 350         dialog.set_transient_for(self.window)
 351         dialog.show()
 352         ret = dialog.run()
 353         dialog.hide()
 354
 355         if ret == gtk.RESPONSE_OK:
 356             result = dialog.get_result()
 357             channel = self.add_output_channel(**result)
 358             self.window.show_all()
 359
 360     def on_edit_input_channel(self, widget, channel):
 361         print 'Editing channel "%s"' % channel.channel_name
 362         channel.on_channel_properties()
 363
 364     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 365         if (widget.get_label() == label):
 366             self.channel_edit_input_menu.remove(widget)
 367
 368     def on_remove_input_channel(self, widget, channel):
 369         print 'Removing channel "%s"' % channel.channel_name
 370         self.channel_remove_input_menu.remove(widget)
 371         self.channel_edit_input_menu.foreach(
 372             self.remove_channel_edit_input_menuitem_by_label,
 373             channel.channel_name);
 374         if self.monitored_channel is channel:
 375             channel.monitor_button.set_active(False)
 376         for i in range(len(self.channels)):
 377             if self.channels[i] is channel:
 378                 channel.unrealize()
 379                 del self.channels[i]
 380                 self.hbox_inputs.remove(channel.parent)
 381                 break
 382         if len(self.channels) == 0:
 383             self.channel_remove_input_menu_item.set_sensitive(False)
 384
 385     def on_edit_output_channel(self, widget, channel):
 386         print 'Editing channel "%s"' % channel.channel_name
 387         channel.on_channel_properties()
 388
 389     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 390         if (widget.get_label() == label):
 391             self.channel_edit_output_menu.remove(widget)
 392
 393     def on_remove_output_channel(self, widget, channel):
 394         print 'Removing channel "%s"' % channel.channel_name
 395         self.channel_remove_output_menu.remove(widget)
 396         self.channel_edit_output_menu.foreach(
 397             self.remove_channel_edit_output_menuitem_by_label,
 398             channel.channel_name);
 399         if self.monitored_channel is channel:
 400             channel.monitor_button.set_active(False)
 401         for i in range(len(self.channels)):
 402             if self.output_channels[i] is channel:
 403                 channel.unrealize()
 404                 del self.output_channels[i]
 405                 self.hbox_outputs.remove(channel.parent)
 406                 break
 407         if len(self.output_channels) == 0:
 408             self.channel_remove_output_menu_item.set_sensitive(False)
 409
 410     def rename_channels(self, container, parameters):
 411         if (container.get_label() == parameters['oldname']):
 412             container.set_label(parameters['newname'])
 413
 414     def on_channel_rename(self, oldname, newname):
 415         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 416         self.channel_edit_input_menu.foreach(self.rename_channels,
 417             rename_parameters)
 418         self.channel_edit_output_menu.foreach(self.rename_channels,
 419             rename_parameters)
 420         self.channel_remove_input_menu.foreach(self.rename_channels,
 421             rename_parameters)
 422         self.channel_remove_output_menu.foreach(self.rename_channels,
 423             rename_parameters)
 424         print "Renaming channel from %s to %s\n" % (oldname, newname)
 425
 426
 427     def on_channels_clear(self, widget):
 428         for channel in self.output_channels:
 429             channel.unrealize()
 430             self.hbox_outputs.remove(channel.parent)
 431         for channel in self.channels:
 432             channel.unrealize()
 433             self.hbox_inputs.remove(channel.parent)
 434         self.channels = []
 435         self.output_channels = []
 436         self.channel_edit_input_menu = gtk.Menu()
 437         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 438         self.channel_edit_input_menu_item.set_sensitive(False)
 439         self.channel_remove_input_menu = gtk.Menu()
 440         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 441         self.channel_remove_input_menu_item.set_sensitive(False)
 442         self.channel_edit_output_menu = gtk.Menu()
 443         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 444         self.channel_edit_output_menu_item.set_sensitive(False)
 445         self.channel_remove_output_menu = gtk.Menu()
 446         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 447         self.channel_remove_output_menu_item.set_sensitive(False)
 448
 449     def add_channel(self, name, stereo, volume_cc, balance_cc):
 450         try:
 451             channel = InputChannel(self, name, stereo)
 452             self.add_channel_precreated(channel)
 453         except Exception:
 454             err = gtk.MessageDialog(self.window,
 455                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 456                             gtk.MESSAGE_ERROR,
 457                             gtk.BUTTONS_OK,
 458                             "Channel creation failed")
 459             err.run()
 460             err.destroy()
 461             return
 462         if volume_cc:
 463             channel.channel.volume_midi_cc = int(volume_cc)
 464         if balance_cc:
 465             channel.channel.balance_midi_cc = int(balance_cc)
 466         if not (volume_cc or balance_cc):
 467             channel.channel.autoset_midi_cc()
 468
 469         return channel
 470
 471     def add_channel_precreated(self, channel):
 472         frame = gtk.Frame()
 473         frame.add(channel)
 474         self.hbox_inputs.pack_start(frame, False)
 475         channel.realize()
 476
 477         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 478         self.channel_edit_input_menu.append(channel_edit_menu_item)
 479         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 480         self.channel_edit_input_menu_item.set_sensitive(True)
 481
 482         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 483         self.channel_remove_input_menu.append(channel_remove_menu_item)
 484         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 485         self.channel_remove_input_menu_item.set_sensitive(True)
 486
 487         self.channels.append(channel)
 488
 489         for outputchannel in self.output_channels:
 490             channel.add_control_group(outputchannel)
 491
 492         # create post fader output channel matching the input channel
 493         channel.post_fader_output_channel = self.mixer.add_output_channel(
 494                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 495         channel.post_fader_output_channel.volume = 0
 496         channel.post_fader_output_channel.set_solo(channel.channel, True)
 497
 498     def read_meters(self):
 499         for channel in self.channels:
 500             channel.read_meter()
 501         self.main_mix.read_meter()
 502         for channel in self.output_channels:
 503             channel.read_meter()
 504         return True
 505
 506     def midi_events_check(self):
 507         for channel in self.channels + [self.main_mix] + self.output_channels:
 508             channel.midi_events_check()
 509         return True
 510
 511     def add_output_channel(self, name, stereo, volume_cc, balance_cc, display_solo_buttons):
 512         try:
 513             channel = OutputChannel(self, name, stereo)
 514             channel.display_solo_buttons = display_solo_buttons
 515             self.add_output_channel_precreated(channel)
 516         except Exception:
 517             err = gtk.MessageDialog(self.window,
 518                             gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
 519                             gtk.MESSAGE_ERROR,
 520                             gtk.BUTTONS_OK,
 521                             "Channel creation failed")
 522             err.run()
 523             err.destroy()
 524             return
 525         if volume_cc:
 526             channel.channel.volume_midi_cc = int(volume_cc)
 527         if balance_cc:
 528             channel.channel.balance_midi_cc = int(balance_cc)
 529         return channel
 530
 531     def add_output_channel_precreated(self, channel):
 532         frame = gtk.Frame()
 533         frame.add(channel)
 534         self.hbox_outputs.pack_start(frame, False)
 535         channel.realize()
 536
 537         channel_edit_menu_item = gtk.MenuItem(channel.channel_name)
 538         self.channel_edit_output_menu.append(channel_edit_menu_item)
 539         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 540         self.channel_edit_output_menu_item.set_sensitive(True)
 541
 542         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 543         self.channel_remove_output_menu.append(channel_remove_menu_item)
 544         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 545         self.channel_remove_output_menu_item.set_sensitive(True)
 546
 547         self.output_channels.append(channel)
 548
 549     _monitored_channel = None
 550     def get_monitored_channel(self):
 551         return self._monitored_channel
 552
 553     def set_monitored_channel(self, channel):
 554         if self._monitored_channel:
 555             if channel.channel.name == self._monitored_channel.channel.name:
 556                 return
 557         self._monitored_channel = channel
 558         if type(channel) is InputChannel:
 559             # reset all solo/mute settings
 560             for in_channel in self.channels:
 561                 self.monitor_channel.set_solo(in_channel.channel, False)
 562                 self.monitor_channel.set_muted(in_channel.channel, False)
 563             self.monitor_channel.set_solo(channel.channel, True)
 564             self.monitor_channel.prefader = True
 565         else:
 566             self.monitor_channel.prefader = False
 567         self.update_monitor(channel)
 568     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 569
 570     def update_monitor(self, channel):
 571         if self.monitored_channel is not channel:
 572             return
 573         self.monitor_channel.volume = channel.channel.volume
 574         self.monitor_channel.balance = channel.channel.balance
 575         if type(self.monitored_channel) is OutputChannel:
 576             # sync solo/muted channels
 577             for input_channel in self.channels:
 578                 self.monitor_channel.set_solo(input_channel.channel,
 579                                 channel.channel.is_solo(input_channel.channel))
 580                 self.monitor_channel.set_muted(input_channel.channel,
 581                                 channel.channel.is_muted(input_channel.channel))
 582         elif type(self.monitored_channel) is MainMixChannel:
 583             # sync solo/muted channels
 584             for input_channel in self.channels:
 585                 self.monitor_channel.set_solo(input_channel.channel,
 586                                 input_channel.channel.solo)
 587                 self.monitor_channel.set_muted(input_channel.channel,
 588                                 input_channel.channel.mute)
 589
 590     def get_input_channel_by_name(self, name):
 591         for input_channel in self.channels:
 592             if input_channel.channel.name == name:
 593                 return input_channel
 594         return None
 595
 596     def on_about(self, *args):
 597         about = gtk.AboutDialog()
 598         about.set_name('jack_mixer')
 599         about.set_copyright('Copyright © 2006-2010\nNedko Arnaudov, Frederic Peters, Arnout Engelen')
 600         about.set_license('''\
 601 jack_mixer is free software; you can redistribute it and/or modify it
 602 under the terms of the GNU General Public License as published by the
 603 Free Software Foundation; either version 2 of the License, or (at your
 604 option) any later version.
 605
 606 jack_mixer is distributed in the hope that it will be useful, but
 607 WITHOUT ANY WARRANTY; without even the implied warranty of
 608 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 609 General Public License for more details.
 610
 611 You should have received a copy of the GNU General Public License along
 612 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 613 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 614         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 615                            'Frederic Peters <fpeters@0d.be>'])
 616         about.set_logo_icon_name('jack_mixer')
 617         about.set_website('http://home.gna.org/jackmixer/')
 618
 619         about.run()
 620         about.destroy()
 621
 622     def lash_check_events(self):
 623         if self.save:
 624             self.save = False
 625             if self.current_filename:
 626                 print "saving on SIGUSR1 request"
 627                 self.on_save_cb()
 628                 print "save done"
 629             else:
 630                 print "not saving because filename is not known"
 631             return True
 632
 633         if not self.lash_client:
 634             return True
 635
 636         while lash.lash_get_pending_event_count(self.lash_client):
 637             event = lash.lash_get_event(self.lash_client)
 638
 639             #print repr(event)
 640
 641             event_type = lash.lash_event_get_type(event)
 642             if event_type == lash.LASH_Quit:
 643                 print "jack_mixer: LASH ordered quit."
 644                 gtk.main_quit()
 645                 return False
 646             elif event_type == lash.LASH_Save_File:
 647                 directory = lash.lash_event_get_string(event)
 648                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 649                 filename = directory + os.sep + "jack_mixer.xml"
 650                 f = file(filename, "w")
 651                 self.save_to_xml(f)
 652                 f.close()
 653                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 654             elif event_type == lash.LASH_Restore_File:
 655                 directory = lash.lash_event_get_string(event)
 656                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 657                 filename = directory + os.sep + "jack_mixer.xml"
 658                 f = file(filename, "r")
 659                 self.load_from_xml(f, silence_errors=True)
 660                 f.close()
 661                 lash.lash_send_event(self.lash_client, event)
 662             else:
 663                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 664                 return True
 665
 666             #lash.lash_event_destroy(event)
 667
 668         return True
 669
 670     def save_to_xml(self, file):
 671         #print "Saving to XML..."
 672         b = XmlSerialization()
 673         s = Serializator()
 674         s.serialize(self, b)
 675         b.save(file)
 676
 677     def load_from_xml(self, file, silence_errors=False):
 678         #print "Loading from XML..."
 679         self.on_channels_clear(None)
 680         self.unserialized_channels = []
 681         b = XmlSerialization()
 682         try:
 683             b.load(file)
 684         except:
 685             if silence_errors:
 686                 return
 687             raise
 688         s = Serializator()
 689         s.unserialize(self, b)
 690         for channel in self.unserialized_channels:
 691             if isinstance(channel, InputChannel):
 692                 self.add_channel_precreated(channel)
 693         for channel in self.unserialized_channels:
 694             if isinstance(channel, OutputChannel):
 695                 self.add_output_channel_precreated(channel)
 696         del self.unserialized_channels
 697         self.window.show_all()
 698
 699     def serialize(self, object_backend):
 700         object_backend.add_property('geometry',
 701                         '%sx%s' % (self.window.allocation.width, self.window.allocation.height))
 702
 703     def unserialize_property(self, name, value):
 704         if name == 'geometry':
 705             width, height = value.split('x')
 706             self.window.resize(int(width), int(height))
 707             return True
 708
 709     def unserialize_child(self, name):
 710         if name == MainMixChannel.serialization_name():
 711             return self.main_mix
 712
 713         if name == InputChannel.serialization_name():
 714             channel = InputChannel(self, "", True)
 715             self.unserialized_channels.append(channel)
 716             return channel
 717
 718         if name == OutputChannel.serialization_name():
 719             channel = OutputChannel(self, "", True)
 720             self.unserialized_channels.append(channel)
 721             return channel
 722
 723     def serialization_get_childs(self):
 724         '''Get child objects tha required and support serialization'''
 725         childs = self.channels[:] + self.output_channels[:]
 726         childs.append(self.main_mix)
 727         return childs
 728
 729     def serialization_name(self):
 730         return "jack_mixer"
 731
 732     def main(self):
 733         self.main_mix.realize()
 734         self.main_mix.set_monitored()
 735
 736         if not self.mixer:
 737             return
 738
 739         self.window.show_all()
 740
 741         signal.signal(signal.SIGUSR1, self.sighandler)
 742         signal.signal(signal.SIGTERM, self.sighandler)
 743         signal.signal(signal.SIGINT, self.sighandler)
 744         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 745
 746         gtk.main()
 747
 748         #f = file("/dev/stdout", "w")
 749         #self.save_to_xml(f)
 750         #f.close
 751
 752 def help():
 753     print "Usage: %s [mixer_name]" % sys.argv[0]
 754
 755 def main():
 756     # Connect to LASH if Python bindings are available, and the user did not
 757     # pass --no-lash
 758     if lash and not '--no-lash' in sys.argv:
 759         # sys.argv is modified by this call
 760         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 761     else:
 762         lash_client = None
 763
 764     parser = OptionParser(usage='usage: %prog [options] [jack_client_name]')
 765     parser.add_option('-c', '--config', dest='config',
 766                       help='use a non default configuration file')
 767     # --no-lash here is not acted upon, it is specified for completeness when
 768     # --help is passed.
 769     parser.add_option('--no-lash', dest='nolash', action='store_true',
 770                       help='do not connect to LASH')
 771     options, args = parser.parse_args()
 772
 773     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 774     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 775     if lash_client:
 776         server_name = lash.lash_get_server_name(lash_client)
 777         if server_name:
 778             print "Successfully connected to LASH server at " + server_name
 779         else:
 780             # getting the server name failed, probably not worth trying to do
 781             # further things with as a lash client.
 782             lash_client = None
 783
 784     if len(args) == 1:
 785         name = args[0]
 786     else:
 787         name = None
 788
 789     if not name:
 790         name = "jack_mixer"
 791
 792     try:
 793         mixer = JackMixer(name, lash_client)
 794     except Exception, e:
 795         err = gtk.MessageDialog(None,
 796                             gtk.DIALOG_MODAL,
 797                             gtk.MESSAGE_ERROR,
 798                             gtk.BUTTONS_OK,
 799                             "Mixer creation failed (%s)" % str(e))
 800         err.run()
 801         err.destroy()
 802         sys.exit(1)
 803
 804     if options.config:
 805         f = file(options.config)
 806         mixer.current_filename = options.config
 807         try:
 808             mixer.load_from_xml(f)
 809         except:
 810             err = gtk.MessageDialog(mixer.window,
 811                             gtk.DIALOG_MODAL,
 812                             gtk.MESSAGE_ERROR,
 813                             gtk.BUTTONS_OK,
 814                             "Failed loading settings.")
 815             err.run()
 816             err.destroy()
 817         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 818         f.close()
 819
 820     mixer.main()
 821
 822     mixer.cleanup()
 823
 824 if __name__ == "__main__":
 825     main()