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 import os
  23 import signal
  24 import sys
  25 from argparse import ArgumentParser
  26
  27 import gi
  28 gi.require_version('Gtk', '3.0')
  29 from gi.repository import Gtk
  30 from gi.repository import GObject
  31 from gi.repository import GLib
  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 import jack_mixer_c
  39
  40 import scale
  41 from channel import *
  42
  43 import gui
  44 from preferences import PreferencesDialog
  45
  46 from serialization_xml import XmlSerialization
  47 from serialization import SerializedObject, Serializator
  48
  49 from nsmclient import NSMClient
  50
  51 # restore Python modules lookup path
  52 sys.path = old_path
  53
  54 class JackMixer(SerializedObject):
  55
  56     # scales suitable as meter scales
  57     meter_scales = [scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  58
  59     # scales suitable as volume slider scales
  60     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
  61
  62     # name of settngs file that is currently open
  63     current_filename = None
  64
  65     _init_solo_channels = None
  66
  67     def __init__(self, client_name='jack_mixer'):
  68         self.visible = False
  69         self.nsm_client = None
  70
  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
  84             self.visible = True
  85             self.create_mixer(client_name, with_nsm = False)
  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
  93         #self.mixer.midi_behavior_mode = self.gui_factory.midi_behavior_modes[self.gui_factory.get_midi_behavior_mode()]
  94
  95         self.window.set_title(client_name)
  96
  97         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  98         self.save = False
  99
 100         GLib.timeout_add(80, self.read_meters)
 101         if with_nsm:
 102             GLib.timeout_add(200, self.nsm_react)
 103         GLib.timeout_add(50, self.midi_events_check)
 104
 105     def new_menu_item(self, title, callback=None, accel=None, enabled=True):
 106         menuitem = Gtk.MenuItem.new_with_mnemonic(title)
 107         menuitem.set_sensitive(enabled)
 108         if callback:
 109             menuitem.connect("activate", callback)
 110         if accel:
 111             key, mod = Gtk.accelerator_parse(accel)
 112             menuitem.add_accelerator("activate", self.menu_accelgroup, key, mod,
 113                                      Gtk.AccelFlags.VISIBLE)
 114         return menuitem
 115
 116     def create_ui(self, with_nsm):
 117         self.channels = []
 118         self.output_channels = []
 119         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
 120         self.window.set_icon_name('jack_mixer')
 121         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
 122         self.gui_factory.connect('midi-behavior-mode-changed', self.on_midi_behavior_mode_changed)
 123         self.vbox_top = Gtk.VBox()
 124         self.window.add(self.vbox_top)
 125
 126         self.menu_accelgroup = Gtk.AccelGroup()
 127         self.window.add_accel_group(self.menu_accelgroup)
 128
 129         self.menubar = Gtk.MenuBar()
 130         self.vbox_top.pack_start(self.menubar, False, True, 0)
 131
 132         mixer_menu_item = Gtk.MenuItem.new_with_mnemonic("_Mixer")
 133         self.menubar.append(mixer_menu_item)
 134         edit_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit')
 135         self.menubar.append(edit_menu_item)
 136         help_menu_item = Gtk.MenuItem.new_with_mnemonic('_Help')
 137         self.menubar.append(help_menu_item)
 138
 139         self.window.set_default_size(120, 300)
 140
 141         self.mixer_menu = Gtk.Menu()
 142         mixer_menu_item.set_submenu(self.mixer_menu)
 143
 144         self.mixer_menu.append(self.new_menu_item('New _Input Channel',
 145                                                   self.on_add_input_channel, "<Control>N"))
 146         self.mixer_menu.append(self.new_menu_item('New Output _Channel',
 147                                                   self.on_add_output_channel, "<Shift><Control>N"))
 148
 149         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 150         if not with_nsm:
 151             self.mixer_menu.append(self.new_menu_item('_Open...', self.on_open_cb, "<Control>O"))
 152
 153         self.mixer_menu.append(self.new_menu_item('_Save', self.on_save_cb, "<Control>S"))
 154
 155         if not with_nsm:
 156             self.mixer_menu.append(self.new_menu_item('Save _As...', self.on_save_as_cb,
 157                                                       "<Shift><Control>S"))
 158
 159         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 160         self.mixer_menu.append(self.new_menu_item('_Quit', self.on_quit_cb, "<Control>Q"))
 161
 162         edit_menu = Gtk.Menu()
 163         edit_menu_item.set_submenu(edit_menu)
 164
 165         self.channel_edit_input_menu_item = self.new_menu_item('_Edit Input Channel',
 166                                                                enabled=False)
 167         edit_menu.append(self.channel_edit_input_menu_item)
 168         self.channel_edit_input_menu = Gtk.Menu()
 169         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 170
 171         self.channel_edit_output_menu_item = self.new_menu_item('E_dit Output Channel',
 172                                                                 enabled=False)
 173         edit_menu.append(self.channel_edit_output_menu_item)
 174         self.channel_edit_output_menu = Gtk.Menu()
 175         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 176
 177         self.channel_remove_input_menu_item = self.new_menu_item('_Remove Input Channel',
 178                                                                  enabled=False)
 179         edit_menu.append(self.channel_remove_input_menu_item)
 180         self.channel_remove_input_menu = Gtk.Menu()
 181         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 182
 183         self.channel_remove_output_menu_item = self.new_menu_item('Re_move Output Channel',
 184                                                                   enabled=False)
 185         edit_menu.append(self.channel_remove_output_menu_item)
 186         self.channel_remove_output_menu = Gtk.Menu()
 187         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 188
 189         edit_menu.append(self.new_menu_item('_Clear', self.on_channels_clear, "<Control>X"))
 190         edit_menu.append(Gtk.SeparatorMenuItem())
 191         edit_menu.append(self.new_menu_item('_Preferences', self.on_preferences_cb, "<Control>P"))
 192
 193         help_menu = Gtk.Menu()
 194         help_menu_item.set_submenu(help_menu)
 195
 196         help_menu.append(self.new_menu_item('_About', self.on_about, "F1"))
 197
 198         self.hbox_top = Gtk.HBox()
 199         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 200
 201         self.scrolled_window = Gtk.ScrolledWindow()
 202         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 203
 204         self.hbox_inputs = Gtk.Box()
 205         self.hbox_inputs.set_spacing(0)
 206         self.hbox_inputs.set_border_width(0)
 207         self.hbox_top.set_spacing(0)
 208         self.hbox_top.set_border_width(0)
 209         self.scrolled_window.add(self.hbox_inputs)
 210         self.hbox_outputs = Gtk.Box()
 211         self.hbox_outputs.set_spacing(0)
 212         self.hbox_outputs.set_border_width(0)
 213         self.scrolled_output = Gtk.ScrolledWindow()
 214         self.scrolled_output.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 215         self.scrolled_output.add(self.hbox_outputs)
 216         paned = Gtk.HPaned()
 217         self.hbox_top.pack_start(paned, True, True, 0)
 218         paned.pack1(self.scrolled_window, True, False)
 219         paned.pack2(self.scrolled_output, True, False)
 220
 221         self.window.connect("destroy", Gtk.main_quit)
 222
 223         self.window.connect('delete-event', self.on_delete_event)
 224
 225     def nsm_react(self):
 226         self.nsm_client.reactToMessage()
 227         return True
 228
 229     def nsm_hide_cb(self):
 230         self.window.hide()
 231         self.visible = False
 232         self.nsm_client.announceGuiVisibility(False)
 233
 234     def nsm_show_cb(self):
 235         self.window.show_all()
 236         self.visible = True
 237         self.nsm_client.announceGuiVisibility(True)
 238
 239     def nsm_open_cb(self, path, session_name, client_name):
 240         self.create_mixer(client_name, with_nsm = True)
 241         self.current_filename = path + '.xml'
 242         if os.path.isfile(self.current_filename):
 243             f = open(self.current_filename, 'r')
 244             self.load_from_xml(f)
 245             f.close()
 246         else:
 247             f = open(self.current_filename, 'w')
 248             f.close()
 249
 250     def nsm_save_cb(self, path, session_name, client_name):
 251         self.current_filename = path + '.xml'
 252         f = open(self.current_filename, 'w')
 253         self.save_to_xml(f)
 254         f.close()
 255
 256     def nsm_exit_cb(self, path, session_name, client_name):
 257         Gtk.main_quit()
 258
 259     def on_midi_behavior_mode_changed(self, gui_factory, value):
 260         self.mixer.midi_behavior_mode = value
 261
 262     def on_delete_event(self, widget, event):
 263         return False
 264
 265     def sighandler(self, signum, frame):
 266         #print "Signal %d received" % signum
 267         if signum == signal.SIGUSR1:
 268             self.save = True
 269         elif signum == signal.SIGTERM:
 270             Gtk.main_quit()
 271         elif signum == signal.SIGINT:
 272             Gtk.main_quit()
 273         else:
 274             print("Unknown signal %d received" % signum)
 275
 276     def cleanup(self):
 277         print("Cleaning jack_mixer")
 278         if not self.mixer:
 279             return
 280
 281         for channel in self.channels:
 282             channel.unrealize()
 283
 284         self.mixer.destroy()
 285
 286     def on_open_cb(self, *args):
 287         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 288                         action=Gtk.FileChooserAction.OPEN)
 289         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 290                         Gtk.STOCK_OPEN, Gtk.ResponseType.OK)
 291         dlg.set_default_response(Gtk.ResponseType.OK)
 292         if dlg.run() == Gtk.ResponseType.OK:
 293             filename = dlg.get_filename()
 294             try:
 295                 f = open(filename, 'r')
 296                 self.load_from_xml(f)
 297             except Exception as e:
 298                 err = Gtk.MessageDialog(parent = self.window,
 299                             modal = True,
 300                             message_type = Gtk.MessageType.ERROR,
 301                             buttons = Gtk.ButtonsType.OK,
 302                             text = "Failed loading settings (%s)." % str(e))
 303                 err.run()
 304                 err.destroy()
 305             else:
 306                 self.current_filename = filename
 307             finally:
 308                 f.close()
 309         dlg.destroy()
 310
 311     def on_save_cb(self, *args):
 312         if not self.current_filename:
 313             return self.on_save_as_cb()
 314         f = open(self.current_filename, 'w')
 315         self.save_to_xml(f)
 316         f.close()
 317
 318     def on_save_as_cb(self, *args):
 319         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 320                         action=Gtk.FileChooserAction.SAVE)
 321         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 322                         Gtk.STOCK_SAVE, Gtk.ResponseType.OK)
 323         dlg.set_default_response(Gtk.ResponseType.OK)
 324         if dlg.run() == Gtk.ResponseType.OK:
 325             self.current_filename = dlg.get_filename()
 326             self.on_save_cb()
 327         dlg.destroy()
 328
 329     def on_quit_cb(self, *args):
 330         Gtk.main_quit()
 331
 332     preferences_dialog = None
 333     def on_preferences_cb(self, widget):
 334         if not self.preferences_dialog:
 335             self.preferences_dialog = PreferencesDialog(self)
 336         self.preferences_dialog.show()
 337         self.preferences_dialog.present()
 338
 339     def on_add_input_channel(self, widget):
 340         dialog = NewChannelDialog(app=self)
 341         dialog.set_transient_for(self.window)
 342         dialog.show()
 343         ret = dialog.run()
 344         dialog.hide()
 345
 346         if ret == Gtk.ResponseType.OK:
 347             result = dialog.get_result()
 348             channel = self.add_channel(**result)
 349             if self.visible:
 350                 self.window.show_all()
 351
 352     def on_add_output_channel(self, widget):
 353         dialog = NewOutputChannelDialog(app=self)
 354         dialog.set_transient_for(self.window)
 355         dialog.show()
 356         ret = dialog.run()
 357         dialog.hide()
 358
 359         if ret == Gtk.ResponseType.OK:
 360             result = dialog.get_result()
 361             channel = self.add_output_channel(**result)
 362             if self.visible:
 363                 self.window.show_all()
 364
 365     def on_edit_input_channel(self, widget, channel):
 366         print('Editing channel "%s"' % channel.channel_name)
 367         channel.on_channel_properties()
 368
 369     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 370         if (widget.get_label() == label):
 371             self.channel_edit_input_menu.remove(widget)
 372
 373     def on_remove_input_channel(self, widget, channel):
 374         print('Removing channel "%s"' % channel.channel_name)
 375         self.channel_remove_input_menu.remove(widget)
 376         self.channel_edit_input_menu.foreach(
 377             self.remove_channel_edit_input_menuitem_by_label,
 378             channel.channel_name);
 379         if self.monitored_channel is channel:
 380             channel.monitor_button.set_active(False)
 381         for i in range(len(self.channels)):
 382             if self.channels[i] is channel:
 383                 channel.unrealize()
 384                 del self.channels[i]
 385                 self.hbox_inputs.remove(channel.get_parent())
 386                 break
 387         if not self.channels:
 388             self.channel_edit_input_menu_item.set_sensitive(False)
 389             self.channel_remove_input_menu_item.set_sensitive(False)
 390
 391     def on_edit_output_channel(self, widget, channel):
 392         print('Editing channel "%s"' % channel.channel_name)
 393         channel.on_channel_properties()
 394
 395     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 396         if (widget.get_label() == label):
 397             self.channel_edit_output_menu.remove(widget)
 398
 399     def on_remove_output_channel(self, widget, channel):
 400         print('Removing channel "%s"' % channel.channel_name)
 401         self.channel_remove_output_menu.remove(widget)
 402         self.channel_edit_output_menu.foreach(
 403             self.remove_channel_edit_output_menuitem_by_label,
 404             channel.channel_name);
 405         if self.monitored_channel is channel:
 406             channel.monitor_button.set_active(False)
 407         for i in range(len(self.channels)):
 408             if self.output_channels[i] is channel:
 409                 channel.unrealize()
 410                 del self.output_channels[i]
 411                 self.hbox_outputs.remove(channel.get_parent())
 412                 break
 413         if not self.output_channels:
 414             self.channel_edit_output_menu_item.set_sensitive(False)
 415             self.channel_remove_output_menu_item.set_sensitive(False)
 416
 417     def rename_channels(self, container, parameters):
 418         if (container.get_label() == parameters['oldname']):
 419             container.set_label(parameters['newname'])
 420
 421     def on_channel_rename(self, oldname, newname):
 422         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 423         self.channel_edit_input_menu.foreach(self.rename_channels,
 424             rename_parameters)
 425         self.channel_edit_output_menu.foreach(self.rename_channels,
 426             rename_parameters)
 427         self.channel_remove_input_menu.foreach(self.rename_channels,
 428             rename_parameters)
 429         self.channel_remove_output_menu.foreach(self.rename_channels,
 430             rename_parameters)
 431         #print("Renaming channel from %s to %s\n" % (oldname, newname))
 432
 433
 434     def on_channels_clear(self, widget):
 435         dlg = Gtk.MessageDialog(parent = self.window,
 436                 modal = True,
 437                 message_type = Gtk.MessageType.WARNING,
 438                 text = "Are you sure you want to clear all channels?",
 439                 buttons = Gtk.ButtonsType.OK_CANCEL)
 440         if not widget or dlg.run() == Gtk.ResponseType.OK:
 441             for channel in self.output_channels:
 442                 channel.unrealize()
 443                 self.hbox_outputs.remove(channel.get_parent())
 444             for channel in self.channels:
 445                 channel.unrealize()
 446                 self.hbox_inputs.remove(channel.get_parent())
 447             self.channels = []
 448             self.output_channels = []
 449             self.channel_edit_input_menu = Gtk.Menu()
 450             self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 451             self.channel_edit_input_menu_item.set_sensitive(False)
 452             self.channel_remove_input_menu = Gtk.Menu()
 453             self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 454             self.channel_remove_input_menu_item.set_sensitive(False)
 455             self.channel_edit_output_menu = Gtk.Menu()
 456             self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 457             self.channel_edit_output_menu_item.set_sensitive(False)
 458             self.channel_remove_output_menu = Gtk.Menu()
 459             self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 460             self.channel_remove_output_menu_item.set_sensitive(False)
 461         dlg.destroy()
 462
 463     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc):
 464         try:
 465             channel = InputChannel(self, name, stereo)
 466             self.add_channel_precreated(channel)
 467         except Exception:
 468             e = sys.exc_info()[0]
 469             err = Gtk.MessageDialog(self.window,
 470                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 471                             Gtk.MessageType.ERROR,
 472                             Gtk.ButtonsType.OK,
 473                             "Channel creation failed")
 474             err.run()
 475             err.destroy()
 476             return
 477         if volume_cc != -1:
 478             channel.channel.volume_midi_cc = volume_cc
 479         else:
 480             channel.channel.autoset_volume_midi_cc()
 481         if balance_cc != -1:
 482             channel.channel.balance_midi_cc = balance_cc
 483         else:
 484             channel.channel.autoset_balance_midi_cc()
 485         if mute_cc != -1:
 486             channel.channel.mute_midi_cc = mute_cc
 487         else:
 488             channel.channel.autoset_mute_midi_cc()
 489         if solo_cc != -1:
 490             channel.channel.solo_midi_cc = solo_cc
 491         else:
 492             channel.channel.autoset_solo_midi_cc()
 493         return channel
 494
 495     def add_channel_precreated(self, channel):
 496         frame = Gtk.Frame()
 497         frame.add(channel)
 498         self.hbox_inputs.pack_start(frame, False, True, 0)
 499         channel.realize()
 500
 501         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 502         self.channel_edit_input_menu.append(channel_edit_menu_item)
 503         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 504         self.channel_edit_input_menu_item.set_sensitive(True)
 505
 506         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 507         self.channel_remove_input_menu.append(channel_remove_menu_item)
 508         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 509         self.channel_remove_input_menu_item.set_sensitive(True)
 510
 511         self.channels.append(channel)
 512
 513         for outputchannel in self.output_channels:
 514             channel.add_control_group(outputchannel)
 515
 516         # create post fader output channel matching the input channel
 517         channel.post_fader_output_channel = self.mixer.add_output_channel(
 518                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 519         channel.post_fader_output_channel.volume = 0
 520         channel.post_fader_output_channel.set_solo(channel.channel, True)
 521
 522     def read_meters(self):
 523         for channel in self.channels:
 524             channel.read_meter()
 525         for channel in self.output_channels:
 526             channel.read_meter()
 527         return True
 528
 529     def midi_events_check(self):
 530         for channel in self.channels + self.output_channels:
 531             channel.midi_events_check()
 532         return True
 533
 534     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc,
 535             display_solo_buttons, color):
 536         try:
 537             channel = OutputChannel(self, name, stereo)
 538             channel.display_solo_buttons = display_solo_buttons
 539             channel.color = color
 540             self.add_output_channel_precreated(channel)
 541         except Exception:
 542             err = Gtk.MessageDialog(self.window,
 543                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 544                             Gtk.MessageType.ERROR,
 545                             Gtk.ButtonsType.OK,
 546                             "Channel creation failed")
 547             err.run()
 548             err.destroy()
 549             return
 550
 551         if volume_cc != -1:
 552             channel.channel.volume_midi_cc = volume_cc
 553         else:
 554             channel.channel.autoset_volume_midi_cc()
 555         if balance_cc != -1:
 556             channel.channel.balance_midi_cc = balance_cc
 557         else:
 558             channel.channel.autoset_balance_midi_cc()
 559         if mute_cc != -1:
 560             channel.channel.mute_midi_cc = mute_cc
 561         else:
 562             channel.channel.autoset_mute_midi_cc()
 563
 564         return channel
 565
 566     def add_output_channel_precreated(self, channel):
 567         frame = Gtk.Frame()
 568         frame.add(channel)
 569         self.hbox_outputs.pack_end(frame, False, True, 0)
 570         self.hbox_outputs.reorder_child(frame, 0)
 571         channel.realize()
 572
 573         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 574         self.channel_edit_output_menu.append(channel_edit_menu_item)
 575         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 576         self.channel_edit_output_menu_item.set_sensitive(True)
 577
 578         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 579         self.channel_remove_output_menu.append(channel_remove_menu_item)
 580         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 581         self.channel_remove_output_menu_item.set_sensitive(True)
 582
 583         self.output_channels.append(channel)
 584
 585     _monitored_channel = None
 586     def get_monitored_channel(self):
 587         return self._monitored_channel
 588
 589     def set_monitored_channel(self, channel):
 590         if self._monitored_channel:
 591             if channel.channel.name == self._monitored_channel.channel.name:
 592                 return
 593         self._monitored_channel = channel
 594         if type(channel) is InputChannel:
 595             # reset all solo/mute settings
 596             for in_channel in self.channels:
 597                 self.monitor_channel.set_solo(in_channel.channel, False)
 598                 self.monitor_channel.set_muted(in_channel.channel, False)
 599             self.monitor_channel.set_solo(channel.channel, True)
 600             self.monitor_channel.prefader = True
 601         else:
 602             self.monitor_channel.prefader = False
 603         self.update_monitor(channel)
 604     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 605
 606     def update_monitor(self, channel):
 607         if self.monitored_channel is not channel:
 608             return
 609         self.monitor_channel.volume = channel.channel.volume
 610         self.monitor_channel.balance = channel.channel.balance
 611         self.monitor_channel.out_mute = channel.channel.out_mute
 612         if type(self.monitored_channel) is OutputChannel:
 613             # sync solo/muted channels
 614             for input_channel in self.channels:
 615                 self.monitor_channel.set_solo(input_channel.channel,
 616                                 channel.channel.is_solo(input_channel.channel))
 617                 self.monitor_channel.set_muted(input_channel.channel,
 618                                 channel.channel.is_muted(input_channel.channel))
 619
 620     def get_input_channel_by_name(self, name):
 621         for input_channel in self.channels:
 622             if input_channel.channel.name == name:
 623                 return input_channel
 624         return None
 625
 626     def on_about(self, *args):
 627         about = Gtk.AboutDialog()
 628         about.set_name('jack_mixer')
 629         about.set_copyright('Copyright © 2006-2020\nNedko Arnaudov, Frédéric Péters, Arnout Engelen, Daniel Sheeler')
 630         about.set_license('''\
 631 jack_mixer is free software; you can redistribute it and/or modify it
 632 under the terms of the GNU General Public License as published by the
 633 Free Software Foundation; either version 2 of the License, or (at your
 634 option) any later version.
 635
 636 jack_mixer is distributed in the hope that it will be useful, but
 637 WITHOUT ANY WARRANTY; without even the implied warranty of
 638 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 639 General Public License for more details.
 640
 641 You should have received a copy of the GNU General Public License along
 642 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 643 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 644         about.set_authors([
 645             'Nedko Arnaudov <nedko@arnaudov.name>',
 646             'Christopher Arndt <chris@chrisarndt.de>',
 647             'Arnout Engelen <arnouten@bzzt.net>',
 648             'John Hedges <john@drystone.co.uk>',
 649             'Olivier Humbert <trebmuh@tuxfamily.org>',
 650             'Sarah Mischke <sarah@spooky-online.de>',
 651             'Frédéric Péters <fpeters@0d.be>',
 652             'Daniel Sheeler <dsheeler@pobox.com>',
 653             'Athanasios Silis <athanasios.silis@gmail.com>',
 654         ])
 655         about.set_logo_icon_name('jack_mixer')
 656         about.set_website('https://rdio.space/jackmixer/')
 657
 658         about.run()
 659         about.destroy()
 660
 661     def save_to_xml(self, file):
 662         #print "Saving to XML..."
 663         b = XmlSerialization()
 664         s = Serializator()
 665         s.serialize(self, b)
 666         b.save(file)
 667
 668     def load_from_xml(self, file, silence_errors=False):
 669         #print "Loading from XML..."
 670         self.unserialized_channels = []
 671         b = XmlSerialization()
 672         try:
 673             b.load(file)
 674         except:
 675             if silence_errors:
 676                 return
 677             raise
 678         self.on_channels_clear(None)
 679         s = Serializator()
 680         s.unserialize(self, b)
 681         for channel in self.unserialized_channels:
 682             if isinstance(channel, InputChannel):
 683                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 684                     channel.solo = True
 685                 self.add_channel_precreated(channel)
 686         self._init_solo_channels = None
 687         for channel in self.unserialized_channels:
 688             if isinstance(channel, OutputChannel):
 689                 self.add_output_channel_precreated(channel)
 690         del self.unserialized_channels
 691         if self.visible:
 692             self.window.show_all()
 693
 694     def serialize(self, object_backend):
 695         width, height = self.window.get_size()
 696         object_backend.add_property('geometry',
 697                         '%sx%s' % (width, height))
 698         solo_channels = []
 699         for input_channel in self.channels:
 700             if input_channel.channel.solo:
 701                 solo_channels.append(input_channel)
 702         if solo_channels:
 703             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 704         object_backend.add_property('visible', '%s' % str(self.visible))
 705
 706     def unserialize_property(self, name, value):
 707         if name == 'geometry':
 708             width, height = value.split('x')
 709             self.window.resize(int(width), int(height))
 710             return True
 711         if name == 'solo_channels':
 712             self._init_solo_channels = value.split('|')
 713             return True
 714         if name == 'visible':
 715             self.visible = value == 'True'
 716             return True
 717
 718     def unserialize_child(self, name):
 719         if name == InputChannel.serialization_name():
 720             channel = InputChannel(self, "", True)
 721             self.unserialized_channels.append(channel)
 722             return channel
 723
 724         if name == OutputChannel.serialization_name():
 725             channel = OutputChannel(self, "", True)
 726             self.unserialized_channels.append(channel)
 727             return channel
 728
 729         if name == gui.Factory.serialization_name():
 730             return self.gui_factory
 731
 732     def serialization_get_childs(self):
 733         '''Get child objects that required and support serialization'''
 734         childs = self.channels[:] + self.output_channels[:] + [self.gui_factory]
 735         return childs
 736
 737     def serialization_name(self):
 738         return "jack_mixer"
 739
 740     def main(self):
 741         if not self.mixer:
 742             return
 743
 744         if self.visible:
 745             self.window.show_all()
 746
 747         signal.signal(signal.SIGUSR1, self.sighandler)
 748         signal.signal(signal.SIGTERM, self.sighandler)
 749         signal.signal(signal.SIGINT, self.sighandler)
 750         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 751
 752         Gtk.main()
 753
 754         #f = file("/dev/stdout", "w")
 755         #self.save_to_xml(f)
 756         #f.close
 757
 758 def main():
 759     parser = ArgumentParser()
 760     parser.add_argument('-c', '--config', help='use a non default configuration file')
 761     parser.add_argument('client_name', metavar='NAME', nargs='?', default='jack_mixer',
 762                         help='set JACK client name')
 763     args = parser.parse_args()
 764
 765     try:
 766         mixer = JackMixer(args.client_name)
 767     except Exception as e:
 768         err = Gtk.MessageDialog(parent = None,
 769                                 modal = True,
 770                                 message_type = Gtk.MessageType.ERROR,
 771                                 buttons = Gtk.ButtonsType.OK,
 772                                 text = "Mixer creation failed (%s)" % str(e))
 773         err.run()
 774         err.destroy()
 775         sys.exit(1)
 776
 777     if not mixer.nsm_client and args.config:
 778         f = open(args.config)
 779         mixer.current_filename = args.config
 780
 781         try:
 782             mixer.load_from_xml(f)
 783         except Exception as e:
 784             err = Gtk.MessageDialog(parent = mixer.window,
 785                             modal =  True,
 786                             message_type = Gtk.MessageType.ERROR,
 787                             buttons = Gtk.ButtonsType.OK,
 788                             text = "Failed loading settings (%s)." % str(e))
 789             err.run()
 790             err.destroy()
 791         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 792         f.close()
 793
 794     mixer.main()
 795
 796     mixer.cleanup()
 797
 798 if __name__ == "__main__":
 799     main()