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