jack_mixer.py

   1 #!/usr/bin/env python3
   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 gi
  25 gi.require_version('Gtk', '3.0')
  26 from gi.repository import Gtk
  27 from gi.repository import GObject
  28 from gi.repository import GLib
  29 import sys
  30 import os
  31 import signal
  32
  33 try:
  34     import lash
  35 except:
  36     lash = None
  37     print("Cannot load LASH python bindings, you want them unless you enjoy manual jack plumbing each time you use this app", file=sys.stderr)
  38
  39 # temporary change Python modules lookup path to look into installation
  40 # directory ($prefix/share/jack_mixer/)
  41 old_path = sys.path
  42 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '..', 'share', 'jack_mixer'))
  43
  44
  45 import jack_mixer_c
  46
  47
  48 import scale
  49 from channel import *
  50
  51 import gui
  52 from preferences import PreferencesDialog
  53
  54 from serialization_xml import XmlSerialization
  55 from serialization import SerializedObject, Serializator
  56
  57 # restore Python modules lookup path
  58 sys.path = old_path
  59
  60 class JackMixer(SerializedObject):
  61
  62     # scales suitable as meter scales
  63     meter_scales = [scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  64
  65     # scales suitable as volume slider scales
  66     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
  67
  68     # name of settngs file that is currently open
  69     current_filename = None
  70
  71     _init_solo_channels = None
  72
  73     def __init__(self, name, lash_client):
  74         self.mixer = jack_mixer_c.Mixer(name)
  75         if not self.mixer:
  76             return
  77         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  78
  79         self.save = False
  80
  81         if lash_client:
  82             # Send our client name to server
  83             lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
  84             lash.lash_event_set_string(lash_event, name)
  85             lash.lash_send_event(lash_client, lash_event)
  86
  87             lash.lash_jack_client_name(lash_client, name)
  88
  89         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
  90         if name != self.mixer.client_name():
  91             self.window.set_title(name + " ("+ self.mixer.client_name()+")" )
  92         else:
  93             self.window.set_title(name)
  94
  95         self.window.set_icon_name('jack_mixer')
  96         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
  97
  98         self.vbox_top = Gtk.VBox()
  99         self.window.add(self.vbox_top)
 100
 101         self.menubar = Gtk.MenuBar()
 102         self.vbox_top.pack_start(self.menubar, False, True, 0)
 103
 104         mixer_menu_item = Gtk.MenuItem.new_with_mnemonic("_Mixer")
 105         self.menubar.append(mixer_menu_item)
 106         edit_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit')
 107         self.menubar.append(edit_menu_item)
 108         help_menu_item = Gtk.MenuItem.new_with_mnemonic('_Help')
 109         self.menubar.append(help_menu_item)
 110
 111         self.window.set_default_size(120, 300)
 112
 113         mixer_menu = Gtk.Menu()
 114         mixer_menu_item.set_submenu(mixer_menu)
 115
 116         add_input_channel = Gtk.MenuItem.new_with_mnemonic('New _Input Channel')
 117         mixer_menu.append(add_input_channel)
 118         add_input_channel.connect("activate", self.on_add_input_channel)
 119
 120         add_output_channel = Gtk.MenuItem.new_with_mnemonic('New _Output Channel')
 121         mixer_menu.append(add_output_channel)
 122         add_output_channel.connect("activate", self.on_add_output_channel)
 123
 124         mixer_menu.append(Gtk.SeparatorMenuItem())
 125         open = Gtk.MenuItem.new_with_mnemonic('_Open')
 126         mixer_menu.append(open)
 127         open.connect('activate', self.on_open_cb)
 128         save = Gtk.MenuItem.new_with_mnemonic('_Save')
 129         mixer_menu.append(save)
 130         save.connect('activate', self.on_save_cb)
 131         save_as = Gtk.MenuItem.new_with_mnemonic('Save_As')
 132         mixer_menu.append(save_as)
 133         save_as.connect('activate', self.on_save_as_cb)
 134
 135         mixer_menu.append(Gtk.SeparatorMenuItem())
 136
 137         quit = Gtk.MenuItem.new_with_mnemonic('_Quit')
 138         mixer_menu.append(quit)
 139         quit.connect('activate', self.on_quit_cb)
 140
 141         edit_menu = Gtk.Menu()
 142         edit_menu_item.set_submenu(edit_menu)
 143
 144         self.channel_edit_input_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit Input Channel')
 145         edit_menu.append(self.channel_edit_input_menu_item)
 146         self.channel_edit_input_menu = Gtk.Menu()
 147         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 148
 149         self.channel_edit_output_menu_item = Gtk.MenuItem.new_with_mnemonic('Edit _Output Channel')
 150         edit_menu.append(self.channel_edit_output_menu_item)
 151         self.channel_edit_output_menu = Gtk.Menu()
 152         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 153
 154         self.channel_remove_input_menu_item = Gtk.MenuItem.new_with_mnemonic('Remove _Input Channel')
 155         edit_menu.append(self.channel_remove_input_menu_item)
 156         self.channel_remove_input_menu = Gtk.Menu()
 157         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 158
 159         self.channel_remove_output_menu_item = Gtk.MenuItem.new_with_mnemonic('_Remove Output Channel')
 160         edit_menu.append(self.channel_remove_output_menu_item)
 161         self.channel_remove_output_menu = Gtk.Menu()
 162         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 163
 164         channel_remove_all_menu_item = Gtk.MenuItem.new_with_mnemonic('Clear')
 165         edit_menu.append(channel_remove_all_menu_item)
 166         channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
 167
 168         edit_menu.append(Gtk.SeparatorMenuItem())
 169
 170         preferences = Gtk.MenuItem.new_with_mnemonic('_Preferences')
 171         preferences.connect('activate', self.on_preferences_cb)
 172         edit_menu.append(preferences)
 173
 174         help_menu = Gtk.Menu()
 175         help_menu_item.set_submenu(help_menu)
 176
 177         about = Gtk.MenuItem.new_with_mnemonic('_About')
 178         help_menu.append(about)
 179         about.connect("activate", self.on_about)
 180
 181         self.hbox_top = Gtk.HBox()
 182         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 183
 184         self.scrolled_window = Gtk.ScrolledWindow()
 185         self.hbox_top.pack_start(self.scrolled_window, True, True, 0)
 186
 187         self.hbox_inputs = Gtk.HBox()
 188         self.hbox_inputs.set_spacing(0)
 189         self.hbox_inputs.set_border_width(0)
 190         self.hbox_top.set_spacing(0)
 191         self.hbox_top.set_border_width(0)
 192         self.channels = []
 193         self.output_channels = []
 194
 195         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 196         self.scrolled_window.add(self.hbox_inputs)
 197
 198         self.hbox_outputs = Gtk.HBox()
 199         self.hbox_outputs.set_spacing(0)
 200         self.hbox_outputs.set_border_width(0)
 201         frame = Gtk.Frame()
 202         self.hbox_outputs.pack_start(frame, False, True, 0)
 203         self.hbox_top.pack_start(self.hbox_outputs, False, True, 0)
 204
 205         self.window.connect("destroy", Gtk.main_quit)
 206
 207         self.window.connect('delete-event', self.on_delete_event)
 208
 209         GLib.timeout_add(80, self.read_meters)
 210         self.lash_client = lash_client
 211
 212         GLib.timeout_add(200, self.lash_check_events)
 213
 214         GLib.timeout_add(50, self.midi_events_check)
 215
 216     def on_delete_event(self, widget, event):
 217         return False
 218
 219     def sighandler(self, signum, frame):
 220         #print "Signal %d received" % signum
 221         if signum == signal.SIGUSR1:
 222             self.save = True
 223         elif signum == signal.SIGTERM:
 224             Gtk.main_quit()
 225         elif signum == signal.SIGINT:
 226             Gtk.main_quit()
 227         else:
 228             print("Unknown signal %d received" % signum)
 229
 230     def cleanup(self):
 231         print("Cleaning jack_mixer")
 232         if not self.mixer:
 233             return
 234
 235         for channel in self.channels:
 236             channel.unrealize()
 237
 238         self.mixer.destroy()
 239
 240     def on_open_cb(self, *args):
 241         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 242                         action=Gtk.FileChooserAction.OPEN,
 243                         buttons=(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 244                                  Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
 245         dlg.set_default_response(Gtk.ResponseType.OK)
 246         if dlg.run() == Gtk.ResponseType.OK:
 247             filename = dlg.get_filename()
 248             try:
 249                 f = file(filename, 'r')
 250                 self.load_from_xml(f)
 251             except:
 252                 err = Gtk.MessageDialog(self.window,
 253                             Gtk.DialogFlags.MODAL,
 254                             Gtk.MessageType.ERROR,
 255                             Gtk.ButtonsType.OK,
 256                             "Failed loading settings.")
 257                 err.run()
 258                 err.destroy()
 259             else:
 260                 self.current_filename = filename
 261             finally:
 262                 f.close()
 263         dlg.destroy()
 264
 265     def on_save_cb(self, *args):
 266         if not self.current_filename:
 267             return self.on_save_as_cb()
 268         f = file(self.current_filename, 'w')
 269         self.save_to_xml(f)
 270         f.close()
 271
 272     def on_save_as_cb(self, *args):
 273         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 274                         action=Gtk.FileChooserAction.SAVE,
 275                         buttons=(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 276                                  Gtk.STOCK_SAVE, Gtk.ResponseType.OK))
 277         dlg.set_default_response(Gtk.ResponseType.OK)
 278         if dlg.run() == Gtk.ResponseType.OK:
 279             self.current_filename = dlg.get_filename()
 280             self.on_save_cb()
 281         dlg.destroy()
 282
 283     def on_quit_cb(self, *args):
 284         Gtk.main_quit()
 285
 286     preferences_dialog = None
 287     def on_preferences_cb(self, widget):
 288         if not self.preferences_dialog:
 289             self.preferences_dialog = PreferencesDialog(self)
 290         self.preferences_dialog.show()
 291         self.preferences_dialog.present()
 292
 293     def on_add_input_channel(self, widget):
 294         dialog = NewChannelDialog(app=self)
 295         dialog.set_transient_for(self.window)
 296         dialog.show()
 297         ret = dialog.run()
 298         dialog.hide()
 299
 300         if ret == Gtk.ResponseType.OK:
 301             result = dialog.get_result()
 302             channel = self.add_channel(**result)
 303             self.window.show_all()
 304
 305     def on_add_output_channel(self, widget):
 306         dialog = NewOutputChannelDialog(app=self)
 307         dialog.set_transient_for(self.window)
 308         dialog.show()
 309         ret = dialog.run()
 310         dialog.hide()
 311
 312         if ret == Gtk.ResponseType.OK:
 313             result = dialog.get_result()
 314             channel = self.add_output_channel(**result)
 315             self.window.show_all()
 316
 317     def on_edit_input_channel(self, widget, channel):
 318         print('Editing channel "%s"' % channel.channel_name)
 319         channel.on_channel_properties()
 320
 321     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 322         if (widget.get_label() == label):
 323             self.channel_edit_input_menu.remove(widget)
 324
 325     def on_remove_input_channel(self, widget, channel):
 326         print('Removing channel "%s"' % channel.channel_name)
 327         self.channel_remove_input_menu.remove(widget)
 328         self.channel_edit_input_menu.foreach(
 329             self.remove_channel_edit_input_menuitem_by_label,
 330             channel.channel_name);
 331         if self.monitored_channel is channel:
 332             channel.monitor_button.set_active(False)
 333         for i in range(len(self.channels)):
 334             if self.channels[i] is channel:
 335                 channel.unrealize()
 336                 del self.channels[i]
 337                 self.hbox_inputs.remove(channel.get_parent())
 338                 break
 339         if len(self.channels) == 0:
 340             self.channel_remove_input_menu_item.set_sensitive(False)
 341
 342     def on_edit_output_channel(self, widget, channel):
 343         print('Editing channel "%s"' % channel.channel_name)
 344         channel.on_channel_properties()
 345
 346     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 347         if (widget.get_label() == label):
 348             self.channel_edit_output_menu.remove(widget)
 349
 350     def on_remove_output_channel(self, widget, channel):
 351         print('Removing channel "%s"' % channel.channel_name)
 352         self.channel_remove_output_menu.remove(widget)
 353         self.channel_edit_output_menu.foreach(
 354             self.remove_channel_edit_output_menuitem_by_label,
 355             channel.channel_name);
 356         if self.monitored_channel is channel:
 357             channel.monitor_button.set_active(False)
 358         for i in range(len(self.channels)):
 359             if self.output_channels[i] is channel:
 360                 channel.unrealize()
 361                 del self.output_channels[i]
 362                 self.hbox_outputs.remove(channel.get_parent())
 363                 break
 364         if len(self.output_channels) == 0:
 365             self.channel_remove_output_menu_item.set_sensitive(False)
 366
 367     def rename_channels(self, container, parameters):
 368         if (container.get_label() == parameters['oldname']):
 369             container.set_label(parameters['newname'])
 370
 371     def on_channel_rename(self, oldname, newname):
 372         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 373         self.channel_edit_input_menu.foreach(self.rename_channels,
 374             rename_parameters)
 375         self.channel_edit_output_menu.foreach(self.rename_channels,
 376             rename_parameters)
 377         self.channel_remove_input_menu.foreach(self.rename_channels,
 378             rename_parameters)
 379         self.channel_remove_output_menu.foreach(self.rename_channels,
 380             rename_parameters)
 381         print("Renaming channel from %s to %s\n" % (oldname, newname))
 382
 383
 384     def on_channels_clear(self, widget):
 385         for channel in self.output_channels:
 386             channel.unrealize()
 387             self.hbox_outputs.remove(channel.get_parent())
 388         for channel in self.channels:
 389             channel.unrealize()
 390             self.hbox_inputs.remove(channel.get_parent())
 391         self.channels = []
 392         self.output_channels = []
 393         self.channel_edit_input_menu = Gtk.Menu()
 394         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 395         self.channel_edit_input_menu_item.set_sensitive(False)
 396         self.channel_remove_input_menu = Gtk.Menu()
 397         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 398         self.channel_remove_input_menu_item.set_sensitive(False)
 399         self.channel_edit_output_menu = Gtk.Menu()
 400         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 401         self.channel_edit_output_menu_item.set_sensitive(False)
 402         self.channel_remove_output_menu = Gtk.Menu()
 403         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 404         self.channel_remove_output_menu_item.set_sensitive(False)
 405
 406     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc):
 407         try:
 408             channel = InputChannel(self, name, stereo)
 409             self.add_channel_precreated(channel)
 410         except Exception:
 411             e = sys.exc_info()[0]
 412             err = Gtk.MessageDialog(self.window,
 413                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 414                             Gtk.MessageType.ERROR,
 415                             Gtk.ButtonsType.OK,
 416                             "Channel creation failed")
 417             err.run()
 418             err.destroy()
 419             return
 420         if volume_cc != '-1':
 421             channel.channel.volume_midi_cc = int(volume_cc)
 422         if balance_cc != '-1':
 423             channel.channel.balance_midi_cc = int(balance_cc)
 424         if mute_cc != '-1':
 425             channel.channel.mute_midi_cc = int(mute_cc)
 426         if solo_cc != '-1':
 427             channel.channel.solo_midi_cc = int(solo_cc)
 428         if (volume_cc == '-1' and balance_cc == '-1' and mute_cc == '-1' and solo_cc == '-1'):
 429             channel.channel.autoset_midi_cc()
 430
 431         return channel
 432
 433     def add_channel_precreated(self, channel):
 434         frame = Gtk.Frame()
 435         frame.add(channel)
 436         self.hbox_inputs.pack_start(frame, False, True, 0)
 437         channel.realize()
 438
 439         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 440         self.channel_edit_input_menu.append(channel_edit_menu_item)
 441         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 442         self.channel_edit_input_menu_item.set_sensitive(True)
 443
 444         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 445         self.channel_remove_input_menu.append(channel_remove_menu_item)
 446         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 447         self.channel_remove_input_menu_item.set_sensitive(True)
 448
 449         self.channels.append(channel)
 450
 451         for outputchannel in self.output_channels:
 452             channel.add_control_group(outputchannel)
 453
 454         # create post fader output channel matching the input channel
 455         channel.post_fader_output_channel = self.mixer.add_output_channel(
 456                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 457         channel.post_fader_output_channel.volume = 0
 458         channel.post_fader_output_channel.set_solo(channel.channel, True)
 459
 460     def read_meters(self):
 461         for channel in self.channels:
 462             channel.read_meter()
 463         for channel in self.output_channels:
 464             channel.read_meter()
 465         return True
 466
 467     def midi_events_check(self):
 468         for channel in self.channels + self.output_channels:
 469             channel.midi_events_check()
 470         return True
 471
 472     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, display_solo_buttons):
 473         try:
 474             channel = OutputChannel(self, name, stereo)
 475             channel.display_solo_buttons = display_solo_buttons
 476             self.add_output_channel_precreated(channel)
 477         except Exception:
 478             err = Gtk.MessageDialog(self.window,
 479                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 480                             Gtk.MessageType.ERROR,
 481                             Gtk.ButtonsType.OK,
 482                             "Channel creation failed")
 483             err.run()
 484             err.destroy()
 485             return
 486         if volume_cc != '-1':
 487             channel.channel.volume_midi_cc = int(volume_cc)
 488         if balance_cc != '-1':
 489             channel.channel.balance_midi_cc = int(balance_cc)
 490         if mute_cc != '-1':
 491             channel.channel.mute_midi_cc = int(mute_cc)
 492         return channel
 493
 494     def add_output_channel_precreated(self, channel):
 495         frame = Gtk.Frame()
 496         frame.add(channel)
 497         self.hbox_outputs.pack_start(frame, False, True, 0)
 498         channel.realize()
 499
 500         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 501         self.channel_edit_output_menu.append(channel_edit_menu_item)
 502         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 503         self.channel_edit_output_menu_item.set_sensitive(True)
 504
 505         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 506         self.channel_remove_output_menu.append(channel_remove_menu_item)
 507         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 508         self.channel_remove_output_menu_item.set_sensitive(True)
 509
 510         self.output_channels.append(channel)
 511
 512     _monitored_channel = None
 513     def get_monitored_channel(self):
 514         return self._monitored_channel
 515
 516     def set_monitored_channel(self, channel):
 517         if self._monitored_channel:
 518             if channel.channel.name == self._monitored_channel.channel.name:
 519                 return
 520         self._monitored_channel = channel
 521         if type(channel) is InputChannel:
 522             # reset all solo/mute settings
 523             for in_channel in self.channels:
 524                 self.monitor_channel.set_solo(in_channel.channel, False)
 525                 self.monitor_channel.set_muted(in_channel.channel, False)
 526             self.monitor_channel.set_solo(channel.channel, True)
 527             self.monitor_channel.prefader = True
 528         else:
 529             self.monitor_channel.prefader = False
 530         self.update_monitor(channel)
 531     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 532
 533     def update_monitor(self, channel):
 534         if self.monitored_channel is not channel:
 535             return
 536         self.monitor_channel.volume = channel.channel.volume
 537         self.monitor_channel.balance = channel.channel.balance
 538         self.monitor_channel.out_mute = channel.channel.out_mute
 539         if type(self.monitored_channel) is OutputChannel:
 540             # sync solo/muted channels
 541             for input_channel in self.channels:
 542                 self.monitor_channel.set_solo(input_channel.channel,
 543                                 channel.channel.is_solo(input_channel.channel))
 544                 self.monitor_channel.set_muted(input_channel.channel,
 545                                 channel.channel.is_muted(input_channel.channel))
 546
 547     def get_input_channel_by_name(self, name):
 548         for input_channel in self.channels:
 549             if input_channel.channel.name == name:
 550                 return input_channel
 551         return None
 552
 553     def on_about(self, *args):
 554         about = Gtk.AboutDialog()
 555         about.set_name('jack_mixer')
 556         about.set_copyright('Copyright © 2006-2020\nNedko Arnaudov, Frederic Peters, Arnout Engelen, Daniel Sheeler')
 557         about.set_license('''\
 558 jack_mixer is free software; you can redistribute it and/or modify it
 559 under the terms of the GNU General Public License as published by the
 560 Free Software Foundation; either version 2 of the License, or (at your
 561 option) any later version.
 562
 563 jack_mixer is distributed in the hope that it will be useful, but
 564 WITHOUT ANY WARRANTY; without even the implied warranty of
 565 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 566 General Public License for more details.
 567
 568 You should have received a copy of the GNU General Public License along
 569 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 570 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 571         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 572                            'Frederic Peters <fpeters@0d.be>'])
 573         about.set_logo_icon_name('jack_mixer')
 574         about.set_website('http://home.gna.org/jackmixer/')
 575
 576         about.run()
 577         about.destroy()
 578
 579     def lash_check_events(self):
 580         if self.save:
 581             self.save = False
 582             if self.current_filename:
 583                 print("saving on SIGUSR1 request")
 584                 self.on_save_cb()
 585                 print("save done")
 586             else:
 587                 print("not saving because filename is not known")
 588             return True
 589
 590         if not self.lash_client:
 591             return True
 592
 593         while lash.lash_get_pending_event_count(self.lash_client):
 594             event = lash.lash_get_event(self.lash_client)
 595
 596             #print repr(event)
 597
 598             event_type = lash.lash_event_get_type(event)
 599             if event_type == lash.LASH_Quit:
 600                 print("jack_mixer: LASH ordered quit.")
 601                 Gtk.main_quit()
 602                 return False
 603             elif event_type == lash.LASH_Save_File:
 604                 directory = lash.lash_event_get_string(event)
 605                 print("jack_mixer: LASH ordered to save data in directory %s" % directory)
 606                 filename = directory + os.sep + "jack_mixer.xml"
 607                 f = file(filename, "w")
 608                 self.save_to_xml(f)
 609                 f.close()
 610                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 611             elif event_type == lash.LASH_Restore_File:
 612                 directory = lash.lash_event_get_string(event)
 613                 print("jack_mixer: LASH ordered to restore data from directory %s" % directory)
 614                 filename = directory + os.sep + "jack_mixer.xml"
 615                 f = file(filename, "r")
 616                 self.load_from_xml(f, silence_errors=True)
 617                 f.close()
 618                 lash.lash_send_event(self.lash_client, event)
 619             else:
 620                 print("jack_mixer: Got unhandled LASH event, type " + str(event_type))
 621                 return True
 622
 623             #lash.lash_event_destroy(event)
 624
 625         return True
 626
 627     def save_to_xml(self, file):
 628         #print "Saving to XML..."
 629         b = XmlSerialization()
 630         s = Serializator()
 631         s.serialize(self, b)
 632         b.save(file)
 633
 634     def load_from_xml(self, file, silence_errors=False):
 635         #print "Loading from XML..."
 636         self.on_channels_clear(None)
 637         self.unserialized_channels = []
 638         b = XmlSerialization()
 639         try:
 640             b.load(file)
 641         except:
 642             if silence_errors:
 643                 return
 644             raise
 645         s = Serializator()
 646         s.unserialize(self, b)
 647         for channel in self.unserialized_channels:
 648             if isinstance(channel, InputChannel):
 649                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 650                     channel.solo = True
 651                 self.add_channel_precreated(channel)
 652         self._init_solo_channels = None
 653         for channel in self.unserialized_channels:
 654             if isinstance(channel, OutputChannel):
 655                 self.add_output_channel_precreated(channel)
 656         del self.unserialized_channels
 657         self.window.show_all()
 658
 659     def serialize(self, object_backend):
 660         width, height = self.window.get_size()
 661         object_backend.add_property('geometry',
 662                         '%sx%s' % (width, height))
 663         solo_channels = []
 664         for input_channel in self.channels:
 665             if input_channel.channel.solo:
 666                 solo_channels.append(input_channel)
 667         if solo_channels:
 668             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 669
 670     def unserialize_property(self, name, value):
 671         if name == 'geometry':
 672             width, height = value.split('x')
 673             self.window.resize(int(width), int(height))
 674             return True
 675         if name == 'solo_channels':
 676             self._init_solo_channels = value.split('|')
 677             return True
 678
 679     def unserialize_child(self, name):
 680         if name == InputChannel.serialization_name():
 681             channel = InputChannel(self, "", True)
 682             self.unserialized_channels.append(channel)
 683             return channel
 684
 685         if name == OutputChannel.serialization_name():
 686             channel = OutputChannel(self, "", True)
 687             self.unserialized_channels.append(channel)
 688             return channel
 689
 690     def serialization_get_childs(self):
 691         '''Get child objects tha required and support serialization'''
 692         childs = self.channels[:] + self.output_channels[:]
 693         return childs
 694
 695     def serialization_name(self):
 696         return "jack_mixer"
 697
 698     def main(self):
 699         if not self.mixer:
 700             return
 701
 702         self.window.show_all()
 703
 704         signal.signal(signal.SIGUSR1, self.sighandler)
 705         signal.signal(signal.SIGTERM, self.sighandler)
 706         signal.signal(signal.SIGINT, self.sighandler)
 707         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 708
 709         Gtk.main()
 710
 711         #f = file("/dev/stdout", "w")
 712         #self.save_to_xml(f)
 713         #f.close
 714
 715 def help():
 716     print("Usage: %s [mixer_name]" % sys.argv[0])
 717
 718 def main():
 719     # Connect to LASH if Python bindings are available, and the user did not
 720     # pass --no-lash
 721     if lash and not '--no-lash' in sys.argv:
 722         # sys.argv is modified by this call
 723         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 724     else:
 725         lash_client = None
 726
 727     parser = OptionParser(usage='usage: %prog [options] [jack_client_name]')
 728     parser.add_option('-c', '--config', dest='config',
 729                       help='use a non default configuration file')
 730     # --no-lash here is not acted upon, it is specified for completeness when
 731     # --help is passed.
 732     parser.add_option('--no-lash', dest='nolash', action='store_true',
 733                       help='do not connect to LASH')
 734     options, args = parser.parse_args()
 735
 736     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 737     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 738     if lash_client:
 739         server_name = lash.lash_get_server_name(lash_client)
 740         if server_name:
 741             print("Successfully connected to LASH server at " + server_name)
 742         else:
 743             # getting the server name failed, probably not worth trying to do
 744             # further things with as a lash client.
 745             lash_client = None
 746
 747     if len(args) == 1:
 748         name = args[0]
 749     else:
 750         name = None
 751
 752     if not name:
 753         name = "jack_mixer"
 754
 755     try:
 756         mixer = JackMixer(name, lash_client)
 757     except Exception as e:
 758         err = Gtk.MessageDialog(None,
 759                             Gtk.DialogFlags.MODAL,
 760                             Gtk.MessageType.ERROR,
 761                             Gtk.ButtonsType.OK,
 762                             "Mixer creation failed (%s)" % str(e))
 763         err.run()
 764         err.destroy()
 765         sys.exit(1)
 766
 767     if options.config:
 768         f = open(options.config)
 769         mixer.current_filename = options.config
 770         try:
 771             mixer.load_from_xml(f)
 772         except:
 773             err = Gtk.MessageDialog(mixer.window,
 774                             Gtk.DialogFlags.MODAL,
 775                             Gtk.MessageType.ERROR,
 776                             Gtk.ButtonsType.OK,
 777                             "Failed loading settings.")
 778             err.run()
 779             err.destroy()
 780         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 781         f.close()
 782
 783     mixer.main()
 784
 785     mixer.cleanup()
 786
 787 if __name__ == "__main__":
 788     main()