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 logging
  23 import os
  24 import signal
  25 import sys
  26 from argparse import ArgumentParser
  27
  28 import gi
  29 gi.require_version('Gtk', '3.0')
  30 from gi.repository import Gtk
  31 from gi.repository import GObject
  32 from gi.repository import GLib
  33
  34 # temporary change Python modules lookup path to look into installation
  35 # directory ($prefix/share/jack_mixer/)
  36 old_path = sys.path
  37 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '..', 'share', 'jack_mixer'))
  38
  39 import jack_mixer_c
  40
  41 import gui
  42 import scale
  43 from channel import *
  44 from nsmclient import NSMClient
  45 from serialization_xml import XmlSerialization
  46 from serialization import SerializedObject, Serializator
  47 from preferences import PreferencesDialog
  48
  49 # restore Python modules lookup path
  50 sys.path = old_path
  51 log = logging.getLogger("jack_mixer")
  52
  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.window.set_title(client_name)
  94
  95         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  96         self.save = False
  97
  98         GLib.timeout_add(80, self.read_meters)
  99         if with_nsm:
 100             GLib.timeout_add(200, self.nsm_react)
 101         GLib.timeout_add(50, self.midi_events_check)
 102
 103     def new_menu_item(self, title, callback=None, accel=None, enabled=True):
 104         menuitem = Gtk.MenuItem.new_with_mnemonic(title)
 105         menuitem.set_sensitive(enabled)
 106         if callback:
 107             menuitem.connect("activate", callback)
 108         if accel:
 109             key, mod = Gtk.accelerator_parse(accel)
 110             menuitem.add_accelerator("activate", self.menu_accelgroup, key, mod,
 111                                      Gtk.AccelFlags.VISIBLE)
 112         return menuitem
 113
 114     def create_ui(self, with_nsm):
 115         self.channels = []
 116         self.output_channels = []
 117         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
 118         self.window.set_icon_name('jack_mixer')
 119         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
 120         self.gui_factory.connect('midi-behavior-mode-changed', self.on_midi_behavior_mode_changed)
 121         self.vbox_top = Gtk.VBox()
 122         self.window.add(self.vbox_top)
 123
 124         self.menu_accelgroup = Gtk.AccelGroup()
 125         self.window.add_accel_group(self.menu_accelgroup)
 126
 127         self.menubar = Gtk.MenuBar()
 128         self.vbox_top.pack_start(self.menubar, False, True, 0)
 129
 130         mixer_menu_item = Gtk.MenuItem.new_with_mnemonic("_Mixer")
 131         self.menubar.append(mixer_menu_item)
 132         edit_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit')
 133         self.menubar.append(edit_menu_item)
 134         help_menu_item = Gtk.MenuItem.new_with_mnemonic('_Help')
 135         self.menubar.append(help_menu_item)
 136
 137         self.window.set_default_size(420, 420)
 138
 139         self.mixer_menu = Gtk.Menu()
 140         mixer_menu_item.set_submenu(self.mixer_menu)
 141
 142         self.mixer_menu.append(self.new_menu_item('New _Input Channel',
 143                                                   self.on_add_input_channel, "<Control>N"))
 144         self.mixer_menu.append(self.new_menu_item('New Output _Channel',
 145                                                   self.on_add_output_channel, "<Shift><Control>N"))
 146
 147         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 148         if not with_nsm:
 149             self.mixer_menu.append(self.new_menu_item('_Open...', self.on_open_cb, "<Control>O"))
 150
 151         self.mixer_menu.append(self.new_menu_item('_Save', self.on_save_cb, "<Control>S"))
 152
 153         if not with_nsm:
 154             self.mixer_menu.append(self.new_menu_item('Save _As...', self.on_save_as_cb,
 155                                                       "<Shift><Control>S"))
 156
 157         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 158         self.mixer_menu.append(self.new_menu_item('_Quit', self.on_quit_cb, "<Control>Q"))
 159
 160         edit_menu = Gtk.Menu()
 161         edit_menu_item.set_submenu(edit_menu)
 162
 163         self.channel_edit_input_menu_item = self.new_menu_item('_Edit Input Channel',
 164                                                                enabled=False)
 165         edit_menu.append(self.channel_edit_input_menu_item)
 166         self.channel_edit_input_menu = Gtk.Menu()
 167         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 168
 169         self.channel_edit_output_menu_item = self.new_menu_item('E_dit Output Channel',
 170                                                                 enabled=False)
 171         edit_menu.append(self.channel_edit_output_menu_item)
 172         self.channel_edit_output_menu = Gtk.Menu()
 173         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 174
 175         self.channel_remove_input_menu_item = self.new_menu_item('_Remove Input Channel',
 176                                                                  enabled=False)
 177         edit_menu.append(self.channel_remove_input_menu_item)
 178         self.channel_remove_input_menu = Gtk.Menu()
 179         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 180
 181         self.channel_remove_output_menu_item = self.new_menu_item('Re_move Output Channel',
 182                                                                   enabled=False)
 183         edit_menu.append(self.channel_remove_output_menu_item)
 184         self.channel_remove_output_menu = Gtk.Menu()
 185         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 186
 187         edit_menu.append(self.new_menu_item('_Clear', self.on_channels_clear, "<Control>X"))
 188         edit_menu.append(Gtk.SeparatorMenuItem())
 189         edit_menu.append(self.new_menu_item('_Preferences', self.on_preferences_cb, "<Control>P"))
 190
 191         help_menu = Gtk.Menu()
 192         help_menu_item.set_submenu(help_menu)
 193
 194         help_menu.append(self.new_menu_item('_About', self.on_about, "F1"))
 195
 196         self.hbox_top = Gtk.HBox()
 197         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 198
 199         self.scrolled_window = Gtk.ScrolledWindow()
 200         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 201
 202         self.hbox_inputs = Gtk.Box()
 203         self.hbox_inputs.set_spacing(0)
 204         self.hbox_inputs.set_border_width(0)
 205         self.hbox_top.set_spacing(0)
 206         self.hbox_top.set_border_width(0)
 207         self.scrolled_window.add(self.hbox_inputs)
 208         self.hbox_outputs = Gtk.Box()
 209         self.hbox_outputs.set_spacing(0)
 210         self.hbox_outputs.set_border_width(0)
 211         self.scrolled_output = Gtk.ScrolledWindow()
 212         self.scrolled_output.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 213         self.scrolled_output.add(self.hbox_outputs)
 214         self.paned = Gtk.HPaned()
 215         self.paned.set_wide_handle(True)
 216         self.hbox_top.pack_start(self.paned, True, True, 0)
 217         self.paned.pack1(self.scrolled_window, True, False)
 218         self.paned.pack2(self.scrolled_output, True, False)
 219
 220         self.window.connect("destroy", Gtk.main_quit)
 221
 222         self.window.connect('delete-event', self.on_delete_event)
 223
 224     def nsm_react(self):
 225         self.nsm_client.reactToMessage()
 226         return True
 227
 228     def nsm_hide_cb(self):
 229         self.window.hide()
 230         self.visible = False
 231         self.nsm_client.announceGuiVisibility(False)
 232
 233     def nsm_show_cb(self):
 234         width, height = self.window.get_size()
 235         self.window.show_all()
 236         self.paned.set_position(self.paned_position/self.width*width)
 237
 238         self.visible = True
 239         self.nsm_client.announceGuiVisibility(True)
 240
 241     def nsm_open_cb(self, path, session_name, client_name):
 242         self.create_mixer(client_name, with_nsm = True)
 243         self.current_filename = path + '.xml'
 244         if os.path.isfile(self.current_filename):
 245             f = open(self.current_filename, 'r')
 246             self.load_from_xml(f)
 247             f.close()
 248         else:
 249             f = open(self.current_filename, 'w')
 250             f.close()
 251
 252     def nsm_save_cb(self, path, session_name, client_name):
 253         self.current_filename = path + '.xml'
 254         f = open(self.current_filename, 'w')
 255         self.save_to_xml(f)
 256         f.close()
 257
 258     def nsm_exit_cb(self, path, session_name, client_name):
 259         Gtk.main_quit()
 260
 261     def on_midi_behavior_mode_changed(self, gui_factory, value):
 262         self.mixer.midi_behavior_mode = value
 263
 264     def on_delete_event(self, widget, event):
 265         return False
 266
 267     def sighandler(self, signum, frame):
 268         log.debug("Signal %d received.", signum)
 269         if signum == signal.SIGUSR1:
 270             self.save = True
 271         elif signum == signal.SIGTERM:
 272             Gtk.main_quit()
 273         elif signum == signal.SIGINT:
 274             Gtk.main_quit()
 275         else:
 276             log.warning("Unknown signal %d received.", signum)
 277
 278     def cleanup(self):
 279         log.debug("Cleaning jack_mixer.")
 280         if not self.mixer:
 281             return
 282
 283         for channel in self.channels:
 284             channel.unrealize()
 285
 286         self.mixer.destroy()
 287
 288     def on_open_cb(self, *args):
 289         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 290                         action=Gtk.FileChooserAction.OPEN)
 291         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 292                         Gtk.STOCK_OPEN, Gtk.ResponseType.OK)
 293         dlg.set_default_response(Gtk.ResponseType.OK)
 294         if dlg.run() == Gtk.ResponseType.OK:
 295             filename = dlg.get_filename()
 296             try:
 297                 f = open(filename, 'r')
 298                 self.load_from_xml(f)
 299             except Exception as e:
 300                 error_dialog(self.window, "Failed loading settings (%s)", e)
 301             else:
 302                 self.current_filename = filename
 303             finally:
 304                 f.close()
 305         dlg.destroy()
 306
 307     def on_save_cb(self, *args):
 308         if not self.current_filename:
 309             return self.on_save_as_cb()
 310         f = open(self.current_filename, 'w')
 311         self.save_to_xml(f)
 312         f.close()
 313
 314     def on_save_as_cb(self, *args):
 315         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 316                         action=Gtk.FileChooserAction.SAVE)
 317         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 318                         Gtk.STOCK_SAVE, Gtk.ResponseType.OK)
 319         dlg.set_default_response(Gtk.ResponseType.OK)
 320         if dlg.run() == Gtk.ResponseType.OK:
 321             self.current_filename = dlg.get_filename()
 322             self.on_save_cb()
 323         dlg.destroy()
 324
 325     def on_quit_cb(self, *args):
 326         Gtk.main_quit()
 327
 328     preferences_dialog = None
 329     def on_preferences_cb(self, widget):
 330         if not self.preferences_dialog:
 331             self.preferences_dialog = PreferencesDialog(self)
 332         self.preferences_dialog.show()
 333         self.preferences_dialog.present()
 334
 335     def on_add_input_channel(self, widget):
 336         dialog = NewInputChannelDialog(app=self)
 337         dialog.set_transient_for(self.window)
 338         dialog.show()
 339         ret = dialog.run()
 340         dialog.hide()
 341
 342         if ret == Gtk.ResponseType.OK:
 343             result = dialog.get_result()
 344             channel = self.add_channel(**result)
 345             if self.visible:
 346                 self.window.show_all()
 347
 348     def on_add_output_channel(self, widget):
 349         dialog = NewOutputChannelDialog(app=self)
 350         dialog.set_transient_for(self.window)
 351         dialog.show()
 352         ret = dialog.run()
 353         dialog.hide()
 354
 355         if ret == Gtk.ResponseType.OK:
 356             result = dialog.get_result()
 357             channel = self.add_output_channel(**result)
 358             if self.visible:
 359                 self.window.show_all()
 360
 361     def on_edit_input_channel(self, widget, channel):
 362         log.debug('Editing input channel "%s".', channel.channel_name)
 363         channel.on_channel_properties()
 364
 365     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 366         if (widget.get_label() == label):
 367             self.channel_edit_input_menu.remove(widget)
 368
 369     def on_remove_input_channel(self, widget, channel):
 370         log.debug('Removing input channel "%s".', channel.channel_name)
 371         self.channel_remove_input_menu.remove(widget)
 372         self.channel_edit_input_menu.foreach(
 373             self.remove_channel_edit_input_menuitem_by_label,
 374             channel.channel_name);
 375         if self.monitored_channel is channel:
 376             channel.monitor_button.set_active(False)
 377         for i in range(len(self.channels)):
 378             if self.channels[i] is channel:
 379                 channel.unrealize()
 380                 del self.channels[i]
 381                 self.hbox_inputs.remove(channel.get_parent())
 382                 break
 383         if not self.channels:
 384             self.channel_edit_input_menu_item.set_sensitive(False)
 385             self.channel_remove_input_menu_item.set_sensitive(False)
 386
 387     def on_edit_output_channel(self, widget, channel):
 388         log.debug('Editing output channel "%s".', channel.channel_name)
 389         channel.on_channel_properties()
 390
 391     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 392         if (widget.get_label() == label):
 393             self.channel_edit_output_menu.remove(widget)
 394
 395     def on_remove_output_channel(self, widget, channel):
 396         log.debug('Removing output channel "%s".', channel.channel_name)
 397         self.channel_remove_output_menu.remove(widget)
 398         self.channel_edit_output_menu.foreach(
 399             self.remove_channel_edit_output_menuitem_by_label,
 400             channel.channel_name);
 401         if self.monitored_channel is channel:
 402             channel.monitor_button.set_active(False)
 403         for i in range(len(self.channels)):
 404             if self.output_channels[i] is channel:
 405                 channel.unrealize()
 406                 del self.output_channels[i]
 407                 self.hbox_outputs.remove(channel.get_parent())
 408                 break
 409         if not self.output_channels:
 410             self.channel_edit_output_menu_item.set_sensitive(False)
 411             self.channel_remove_output_menu_item.set_sensitive(False)
 412
 413     def rename_channels(self, container, parameters):
 414         if (container.get_label() == parameters['oldname']):
 415             container.set_label(parameters['newname'])
 416
 417     def on_channel_rename(self, oldname, newname):
 418         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 419         self.channel_edit_input_menu.foreach(self.rename_channels,
 420             rename_parameters)
 421         self.channel_edit_output_menu.foreach(self.rename_channels,
 422             rename_parameters)
 423         self.channel_remove_input_menu.foreach(self.rename_channels,
 424             rename_parameters)
 425         self.channel_remove_output_menu.foreach(self.rename_channels,
 426             rename_parameters)
 427         log.debug('Renaming channel from "%s" to "%s".', oldname, newname)
 428
 429     def on_channels_clear(self, widget):
 430         dlg = Gtk.MessageDialog(parent = self.window,
 431                 modal = True,
 432                 message_type = Gtk.MessageType.WARNING,
 433                 text = "Are you sure you want to clear all channels?",
 434                 buttons = Gtk.ButtonsType.OK_CANCEL)
 435         if not widget or dlg.run() == Gtk.ResponseType.OK:
 436             for channel in self.output_channels:
 437                 channel.unrealize()
 438                 self.hbox_outputs.remove(channel.get_parent())
 439             for channel in self.channels:
 440                 channel.unrealize()
 441                 self.hbox_inputs.remove(channel.get_parent())
 442             self.channels = []
 443             self.output_channels = []
 444             self.channel_edit_input_menu = Gtk.Menu()
 445             self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 446             self.channel_edit_input_menu_item.set_sensitive(False)
 447             self.channel_remove_input_menu = Gtk.Menu()
 448             self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 449             self.channel_remove_input_menu_item.set_sensitive(False)
 450             self.channel_edit_output_menu = Gtk.Menu()
 451             self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 452             self.channel_edit_output_menu_item.set_sensitive(False)
 453             self.channel_remove_output_menu = Gtk.Menu()
 454             self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 455             self.channel_remove_output_menu_item.set_sensitive(False)
 456         dlg.destroy()
 457
 458     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc, value):
 459         try:
 460             channel = InputChannel(self, name, stereo, value)
 461             self.add_channel_precreated(channel)
 462         except Exception:
 463             error_dialog(self.window, "Channel creation failed.")
 464             return
 465         if volume_cc != -1:
 466             channel.channel.volume_midi_cc = volume_cc
 467         else:
 468             channel.channel.autoset_volume_midi_cc()
 469         if balance_cc != -1:
 470             channel.channel.balance_midi_cc = balance_cc
 471         else:
 472             channel.channel.autoset_balance_midi_cc()
 473         if mute_cc != -1:
 474             channel.channel.mute_midi_cc = mute_cc
 475         else:
 476             channel.channel.autoset_mute_midi_cc()
 477         if solo_cc != -1:
 478             channel.channel.solo_midi_cc = solo_cc
 479         else:
 480             channel.channel.autoset_solo_midi_cc()
 481         return channel
 482
 483     def add_channel_precreated(self, channel):
 484         frame = Gtk.Frame()
 485         frame.add(channel)
 486         self.hbox_inputs.pack_start(frame, False, True, 0)
 487         channel.realize()
 488
 489         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 490         self.channel_edit_input_menu.append(channel_edit_menu_item)
 491         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 492         self.channel_edit_input_menu_item.set_sensitive(True)
 493
 494         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 495         self.channel_remove_input_menu.append(channel_remove_menu_item)
 496         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 497         self.channel_remove_input_menu_item.set_sensitive(True)
 498
 499         self.channels.append(channel)
 500
 501         for outputchannel in self.output_channels:
 502             channel.add_control_group(outputchannel)
 503
 504         # create post fader output channel matching the input channel
 505         channel.post_fader_output_channel = self.mixer.add_output_channel(
 506                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 507         channel.post_fader_output_channel.volume = 0
 508         channel.post_fader_output_channel.set_solo(channel.channel, True)
 509
 510     def read_meters(self):
 511         for channel in self.channels:
 512             channel.read_meter()
 513         for channel in self.output_channels:
 514             channel.read_meter()
 515         return True
 516
 517     def midi_events_check(self):
 518         for channel in self.channels + self.output_channels:
 519             channel.midi_events_check()
 520         return True
 521
 522     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc,
 523             display_solo_buttons, color, value):
 524         try:
 525             channel = OutputChannel(self, name, stereo, value)
 526             channel.display_solo_buttons = display_solo_buttons
 527             channel.color = color
 528             self.add_output_channel_precreated(channel)
 529         except Exception:
 530             error_dialog(self.window, "Channel creation failed")
 531             return
 532
 533         if volume_cc != -1:
 534             channel.channel.volume_midi_cc = volume_cc
 535         else:
 536             channel.channel.autoset_volume_midi_cc()
 537         if balance_cc != -1:
 538             channel.channel.balance_midi_cc = balance_cc
 539         else:
 540             channel.channel.autoset_balance_midi_cc()
 541         if mute_cc != -1:
 542             channel.channel.mute_midi_cc = mute_cc
 543         else:
 544             channel.channel.autoset_mute_midi_cc()
 545
 546         return channel
 547
 548     def add_output_channel_precreated(self, channel):
 549         frame = Gtk.Frame()
 550         frame.add(channel)
 551         self.hbox_outputs.pack_end(frame, False, True, 0)
 552         self.hbox_outputs.reorder_child(frame, 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, Frédéric Péters, 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([
 627             'Nedko Arnaudov <nedko@arnaudov.name>',
 628             'Christopher Arndt <chris@chrisarndt.de>',
 629             'Arnout Engelen <arnouten@bzzt.net>',
 630             'John Hedges <john@drystone.co.uk>',
 631             'Olivier Humbert <trebmuh@tuxfamily.org>',
 632             'Sarah Mischke <sarah@spooky-online.de>',
 633             'Frédéric Péters <fpeters@0d.be>',
 634             'Daniel Sheeler <dsheeler@pobox.com>',
 635             'Athanasios Silis <athanasios.silis@gmail.com>',
 636         ])
 637         about.set_logo_icon_name('jack_mixer')
 638         about.set_website('https://rdio.space/jackmixer/')
 639
 640         about.run()
 641         about.destroy()
 642
 643     def save_to_xml(self, file):
 644         log.debug("Saving to XML...")
 645         b = XmlSerialization()
 646         s = Serializator()
 647         s.serialize(self, b)
 648         b.save(file)
 649
 650     def load_from_xml(self, file, silence_errors=False):
 651         log.debug("Loading from XML...")
 652         self.unserialized_channels = []
 653         b = XmlSerialization()
 654         try:
 655             b.load(file)
 656         except:
 657             if silence_errors:
 658                 return
 659             raise
 660         self.on_channels_clear(None)
 661         s = Serializator()
 662         s.unserialize(self, b)
 663         for channel in self.unserialized_channels:
 664             if isinstance(channel, InputChannel):
 665                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 666                     channel.solo = True
 667                 self.add_channel_precreated(channel)
 668         self._init_solo_channels = None
 669         for channel in self.unserialized_channels:
 670             if isinstance(channel, OutputChannel):
 671                 self.add_output_channel_precreated(channel)
 672         del self.unserialized_channels
 673         width, height = self.window.get_size()
 674         if self.visible:
 675             self.window.show_all()
 676         self.paned.set_position(self.paned_position/self.width*width)
 677         self.window.resize(self.width, self.height)
 678
 679     def serialize(self, object_backend):
 680         width, height = self.window.get_size()
 681         object_backend.add_property('geometry',
 682                         '%sx%s' % (width, height))
 683         pos = self.paned.get_position()
 684         object_backend.add_property('paned_position', '%s' % pos)
 685         solo_channels = []
 686         for input_channel in self.channels:
 687             if input_channel.channel.solo:
 688                 solo_channels.append(input_channel)
 689         if solo_channels:
 690             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 691         object_backend.add_property('visible', '%s' % str(self.visible))
 692
 693     def unserialize_property(self, name, value):
 694         if name == 'geometry':
 695             width, height = value.split('x')
 696             self.width = int(width)
 697             self.height = int(height)
 698             return True
 699         if name == 'solo_channels':
 700             self._init_solo_channels = value.split('|')
 701             return True
 702         if name == 'visible':
 703             self.visible = value == 'True'
 704             return True
 705         if name == 'paned_position':
 706             self.paned_position = int(value)
 707             return True
 708         return False
 709
 710     def unserialize_child(self, name):
 711         if name == InputChannel.serialization_name():
 712             channel = InputChannel(self, "", True)
 713             self.unserialized_channels.append(channel)
 714             return channel
 715
 716         if name == OutputChannel.serialization_name():
 717             channel = OutputChannel(self, "", True)
 718             self.unserialized_channels.append(channel)
 719             return channel
 720
 721         if name == gui.Factory.serialization_name():
 722             return self.gui_factory
 723
 724     def serialization_get_childs(self):
 725         '''Get child objects that required and support serialization'''
 726         childs = self.channels[:] + self.output_channels[:] + [self.gui_factory]
 727         return childs
 728
 729     def serialization_name(self):
 730         return "jack_mixer"
 731
 732     def main(self):
 733         if not self.mixer:
 734             return
 735
 736         if self.visible or self.nsm_client == None:
 737             width, height = self.window.get_size()
 738             self.window.show_all()
 739             self.paned.set_position(self.paned_position/self.width*width)
 740
 741         signal.signal(signal.SIGUSR1, self.sighandler)
 742         signal.signal(signal.SIGTERM, self.sighandler)
 743         signal.signal(signal.SIGINT, self.sighandler)
 744         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 745
 746         Gtk.main()
 747
 748 def error_dialog(parent, msg, *args):
 749     log.exception(msg, *args)
 750     err = Gtk.MessageDialog(parent=parent, modal=True, destroy_with_parent=True,
 751         message_type=Gtk.MessageType.ERROR, buttons=Gtk.ButtonsType.OK, text=msg % args)
 752     err.run()
 753     err.destroy()
 754
 755 def main():
 756     parser = ArgumentParser()
 757     parser.add_argument('-c', '--config', metavar="FILE", help='load mixer project configuration from FILE')
 758     parser.add_argument('-d', '--debug', action="store_true", help='enable debug logging messages')
 759     parser.add_argument('client_name', metavar='NAME', nargs='?', default='jack_mixer',
 760                         help='set JACK client name')
 761     args = parser.parse_args()
 762
 763     logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO,
 764                         format="%(levelname)s: %(message)s")
 765
 766     try:
 767         mixer = JackMixer(args.client_name)
 768     except Exception as e:
 769         error_dialog(None, "Mixer creation failed (%s).", e)
 770         sys.exit(1)
 771
 772     if not mixer.nsm_client and args.config:
 773         f = open(args.config)
 774         mixer.current_filename = args.config
 775
 776         try:
 777             mixer.load_from_xml(f)
 778         except Exception as e:
 779             error_dialog(mixer.window, "Failed loading settings (%s).", e)
 780
 781         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 782         f.close()
 783
 784     mixer.main()
 785
 786     mixer.cleanup()
 787
 788 if __name__ == "__main__":
 789     main()