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