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 class JackMixer(SerializedObject):
  54
  55     # scales suitable as meter scales
  56     meter_scales = [scale.K20(), scale.K14(), scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  57
  58     # scales suitable as volume slider scales
  59     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
  60
  61     # name of settngs file that is currently open
  62     current_filename = None
  63
  64     _init_solo_channels = None
  65
  66     def __init__(self, client_name='jack_mixer'):
  67         self.visible = False
  68         self.nsm_client = None
  69
  70         if os.environ.get('NSM_URL'):
  71             self.nsm_client = NSMClient(prettyName = "jack_mixer",
  72                                         saveCallback = self.nsm_save_cb,
  73                                         openOrNewCallback = self.nsm_open_cb,
  74                                         supportsSaveStatus = False,
  75                                         hideGUICallback = self.nsm_hide_cb,
  76                                         showGUICallback = self.nsm_show_cb,
  77                                         exitProgramCallback = self.nsm_exit_cb,
  78                                         loggingLevel = "error",
  79                                        )
  80             self.nsm_client.announceGuiVisibility(self.visible)
  81         else:
  82             self.visible = True
  83             self.create_mixer(client_name, with_nsm = False)
  84
  85     def create_mixer(self, client_name, with_nsm = True):
  86         self.mixer = jack_mixer_c.Mixer(client_name)
  87         self.create_ui(with_nsm)
  88         if not self.mixer:
  89             sys.exit(1)
  90
  91         self.window.set_title(client_name)
  92
  93         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  94         self.save = False
  95
  96         GLib.timeout_add(33, self.read_meters)
  97         if with_nsm:
  98             GLib.timeout_add(200, self.nsm_react)
  99         GLib.timeout_add(50, self.midi_events_check)
 100
 101     def new_menu_item(self, title, callback=None, accel=None, enabled=True):
 102         menuitem = Gtk.MenuItem.new_with_mnemonic(title)
 103         menuitem.set_sensitive(enabled)
 104         if callback:
 105             menuitem.connect("activate", callback)
 106         if accel:
 107             key, mod = Gtk.accelerator_parse(accel)
 108             menuitem.add_accelerator("activate", self.menu_accelgroup, key, mod,
 109                                      Gtk.AccelFlags.VISIBLE)
 110         return menuitem
 111
 112     def create_ui(self, with_nsm):
 113         self.channels = []
 114         self.output_channels = []
 115         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
 116         self.window.set_icon_name('jack_mixer')
 117         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
 118         self.gui_factory.connect('midi-behavior-mode-changed', self.on_midi_behavior_mode_changed)
 119         self.gui_factory.emit_midi_behavior_mode()
 120
 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.width = 420
 138         self.height = 420
 139         self.paned_position = 210
 140         self.window.set_default_size(self.width, self.height)
 141
 142         self.mixer_menu = Gtk.Menu()
 143         mixer_menu_item.set_submenu(self.mixer_menu)
 144
 145         self.mixer_menu.append(self.new_menu_item('New _Input Channel',
 146                                                   self.on_add_input_channel, "<Control>N"))
 147         self.mixer_menu.append(self.new_menu_item('New Output _Channel',
 148                                                   self.on_add_output_channel, "<Shift><Control>N"))
 149
 150         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 151         if not with_nsm:
 152             self.mixer_menu.append(self.new_menu_item('_Open...', self.on_open_cb, "<Control>O"))
 153
 154         self.mixer_menu.append(self.new_menu_item('_Save', self.on_save_cb, "<Control>S"))
 155
 156         if not with_nsm:
 157             self.mixer_menu.append(self.new_menu_item('Save _As...', self.on_save_as_cb,
 158                                                       "<Shift><Control>S"))
 159
 160         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 161         if with_nsm:
 162             self.mixer_menu.append(self.new_menu_item('_Hide', self.nsm_hide_cb, "<Control>W"))
 163         else:
 164             self.mixer_menu.append(self.new_menu_item('_Quit', self.on_quit_cb, "<Control>Q"))
 165
 166         edit_menu = Gtk.Menu()
 167         edit_menu_item.set_submenu(edit_menu)
 168
 169         self.channel_edit_input_menu_item = self.new_menu_item('_Edit Input Channel',
 170                                                                enabled=False)
 171         edit_menu.append(self.channel_edit_input_menu_item)
 172         self.channel_edit_input_menu = Gtk.Menu()
 173         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 174
 175         self.channel_edit_output_menu_item = self.new_menu_item('E_dit Output Channel',
 176                                                                 enabled=False)
 177         edit_menu.append(self.channel_edit_output_menu_item)
 178         self.channel_edit_output_menu = Gtk.Menu()
 179         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 180
 181         self.channel_remove_input_menu_item = self.new_menu_item('_Remove Input Channel',
 182                                                                  enabled=False)
 183         edit_menu.append(self.channel_remove_input_menu_item)
 184         self.channel_remove_input_menu = Gtk.Menu()
 185         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 186
 187         self.channel_remove_output_menu_item = self.new_menu_item('Re_move Output Channel',
 188                                                                   enabled=False)
 189         edit_menu.append(self.channel_remove_output_menu_item)
 190         self.channel_remove_output_menu = Gtk.Menu()
 191         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 192
 193         edit_menu.append(Gtk.SeparatorMenuItem())
 194         edit_menu.append(self.new_menu_item('Shrink Input Channels', self.on_narrow_input_channels_cb, "<Control>minus"))
 195         edit_menu.append(self.new_menu_item('Expand Input Channels', self.on_widen_input_channels_cb, "<Control>plus"))
 196         edit_menu.append(Gtk.SeparatorMenuItem())
 197
 198         edit_menu.append(self.new_menu_item('_Clear', self.on_channels_clear, "<Control>X"))
 199         edit_menu.append(Gtk.SeparatorMenuItem())
 200         edit_menu.append(self.new_menu_item('_Preferences', self.on_preferences_cb, "<Control>P"))
 201
 202         help_menu = Gtk.Menu()
 203         help_menu_item.set_submenu(help_menu)
 204
 205         help_menu.append(self.new_menu_item('_About', self.on_about, "F1"))
 206
 207         self.hbox_top = Gtk.HBox()
 208         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 209
 210         self.scrolled_window = Gtk.ScrolledWindow()
 211         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 212
 213         self.hbox_inputs = Gtk.Box()
 214         self.hbox_inputs.set_spacing(0)
 215         self.hbox_inputs.set_border_width(0)
 216         self.hbox_top.set_spacing(0)
 217         self.hbox_top.set_border_width(0)
 218         self.scrolled_window.add(self.hbox_inputs)
 219         self.hbox_outputs = Gtk.Box()
 220         self.hbox_outputs.set_spacing(0)
 221         self.hbox_outputs.set_border_width(0)
 222         self.scrolled_output = Gtk.ScrolledWindow()
 223         self.scrolled_output.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 224         self.scrolled_output.add(self.hbox_outputs)
 225         self.paned = Gtk.HPaned()
 226         self.paned.set_wide_handle(True)
 227         self.hbox_top.pack_start(self.paned, True, True, 0)
 228         self.paned.pack1(self.scrolled_window, True, False)
 229         self.paned.pack2(self.scrolled_output, True, False)
 230         self.window.connect("destroy", Gtk.main_quit)
 231         self.window.connect('delete-event', self.on_delete_event)
 232
 233     def nsm_react(self):
 234         self.nsm_client.reactToMessage()
 235         return True
 236
 237     def nsm_hide_cb(self, *args):
 238         self.window.hide()
 239         self.visible = False
 240         self.nsm_client.announceGuiVisibility(False)
 241
 242     def nsm_show_cb(self):
 243         width, height = self.window.get_size()
 244         self.window.show_all()
 245         self.paned.set_position(self.paned_position/self.width*width)
 246
 247         self.visible = True
 248         self.nsm_client.announceGuiVisibility(True)
 249
 250     def nsm_open_cb(self, path, session_name, client_name):
 251         self.create_mixer(client_name, with_nsm = True)
 252         self.current_filename = path + '.xml'
 253         if os.path.isfile(self.current_filename):
 254             f = open(self.current_filename, 'r')
 255             self.load_from_xml(f, from_nsm=True)
 256             f.close()
 257         else:
 258             f = open(self.current_filename, 'w')
 259             f.close()
 260
 261     def nsm_save_cb(self, path, session_name, client_name):
 262         self.current_filename = path + '.xml'
 263         f = open(self.current_filename, 'w')
 264         self.save_to_xml(f)
 265         f.close()
 266
 267     def nsm_exit_cb(self, path, session_name, client_name):
 268         Gtk.main_quit()
 269
 270     def on_midi_behavior_mode_changed(self, gui_factory, value):
 271         self.mixer.midi_behavior_mode = value
 272
 273     def on_delete_event(self, widget, event):
 274         if self.nsm_client:
 275             self.nsm_hide_cb()
 276             return True
 277
 278         return False
 279
 280     def sighandler(self, signum, frame):
 281         log.debug("Signal %d received.", signum)
 282         if signum == signal.SIGUSR1:
 283             self.save = True
 284         elif signum == signal.SIGTERM:
 285             Gtk.main_quit()
 286         elif signum == signal.SIGINT:
 287             Gtk.main_quit()
 288         else:
 289             log.warning("Unknown signal %d received.", signum)
 290
 291     def cleanup(self):
 292         log.debug("Cleaning jack_mixer.")
 293         if not self.mixer:
 294             return
 295
 296         for channel in self.channels:
 297             channel.unrealize()
 298
 299         self.mixer.destroy()
 300
 301     def on_open_cb(self, *args):
 302         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 303                         action=Gtk.FileChooserAction.OPEN)
 304         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 305                         Gtk.STOCK_OPEN, Gtk.ResponseType.OK)
 306         dlg.set_default_response(Gtk.ResponseType.OK)
 307         if dlg.run() == Gtk.ResponseType.OK:
 308             filename = dlg.get_filename()
 309             try:
 310                 f = open(filename, 'r')
 311                 self.load_from_xml(f)
 312             except Exception as e:
 313                 error_dialog(self.window, "Failed loading settings (%s)", e)
 314             else:
 315                 self.current_filename = filename
 316             finally:
 317                 f.close()
 318         dlg.destroy()
 319
 320     def on_save_cb(self, *args):
 321         if not self.current_filename:
 322             return self.on_save_as_cb()
 323         f = open(self.current_filename, 'w')
 324         self.save_to_xml(f)
 325         f.close()
 326
 327     def on_save_as_cb(self, *args):
 328         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 329                         action=Gtk.FileChooserAction.SAVE)
 330         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 331                         Gtk.STOCK_SAVE, Gtk.ResponseType.OK)
 332         dlg.set_default_response(Gtk.ResponseType.OK)
 333         if dlg.run() == Gtk.ResponseType.OK:
 334             self.current_filename = dlg.get_filename()
 335             self.on_save_cb()
 336         dlg.destroy()
 337
 338     def on_quit_cb(self, *args):
 339         Gtk.main_quit()
 340
 341     def on_narrow_input_channels_cb(self, widget):
 342         for channel in self.channels:
 343             channel.narrow()
 344
 345     def on_widen_input_channels_cb(self, widget):
 346         for channel in self.channels:
 347             channel.widen()
 348
 349     preferences_dialog = None
 350     def on_preferences_cb(self, widget):
 351         if not self.preferences_dialog:
 352             self.preferences_dialog = PreferencesDialog(self)
 353         self.preferences_dialog.show()
 354         self.preferences_dialog.present()
 355
 356     def on_add_input_channel(self, widget):
 357         dialog = NewInputChannelDialog(app=self)
 358         dialog.set_transient_for(self.window)
 359         dialog.show()
 360         ret = dialog.run()
 361         dialog.hide()
 362
 363         if ret == Gtk.ResponseType.OK:
 364             result = dialog.get_result()
 365             channel = self.add_channel(**result)
 366             if self.visible or self.nsm_client == None:
 367                 self.window.show_all()
 368
 369     def on_add_output_channel(self, widget):
 370         dialog = NewOutputChannelDialog(app=self)
 371         dialog.set_transient_for(self.window)
 372         dialog.show()
 373         ret = dialog.run()
 374         dialog.hide()
 375
 376         if ret == Gtk.ResponseType.OK:
 377             result = dialog.get_result()
 378             channel = self.add_output_channel(**result)
 379             if self.visible or self.nsm_client == None:
 380                 self.window.show_all()
 381
 382     def on_edit_input_channel(self, widget, channel):
 383         log.debug('Editing input channel "%s".', channel.channel_name)
 384         channel.on_channel_properties()
 385
 386     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 387         if (widget.get_label() == label):
 388             self.channel_edit_input_menu.remove(widget)
 389
 390     def on_remove_input_channel(self, widget, channel):
 391         log.debug('Removing input channel "%s".', channel.channel_name)
 392         self.channel_remove_input_menu.remove(widget)
 393         self.channel_edit_input_menu.foreach(
 394             self.remove_channel_edit_input_menuitem_by_label,
 395             channel.channel_name);
 396         if self.monitored_channel is channel:
 397             channel.monitor_button.set_active(False)
 398         for i in range(len(self.channels)):
 399             if self.channels[i] is channel:
 400                 channel.unrealize()
 401                 del self.channels[i]
 402                 self.hbox_inputs.remove(channel.get_parent())
 403                 break
 404         if not self.channels:
 405             self.channel_edit_input_menu_item.set_sensitive(False)
 406             self.channel_remove_input_menu_item.set_sensitive(False)
 407
 408     def on_edit_output_channel(self, widget, channel):
 409         log.debug('Editing output channel "%s".', channel.channel_name)
 410         channel.on_channel_properties()
 411
 412     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 413         if (widget.get_label() == label):
 414             self.channel_edit_output_menu.remove(widget)
 415
 416     def on_remove_output_channel(self, widget, channel):
 417         log.debug('Removing output channel "%s".', channel.channel_name)
 418         self.channel_remove_output_menu.remove(widget)
 419         self.channel_edit_output_menu.foreach(
 420             self.remove_channel_edit_output_menuitem_by_label,
 421             channel.channel_name);
 422         if self.monitored_channel is channel:
 423             channel.monitor_button.set_active(False)
 424         for i in range(len(self.channels)):
 425             if self.output_channels[i] is channel:
 426                 channel.unrealize()
 427                 del self.output_channels[i]
 428                 self.hbox_outputs.remove(channel.get_parent())
 429                 break
 430         if not self.output_channels:
 431             self.channel_edit_output_menu_item.set_sensitive(False)
 432             self.channel_remove_output_menu_item.set_sensitive(False)
 433
 434     def rename_channels(self, container, parameters):
 435         if (container.get_label() == parameters['oldname']):
 436             container.set_label(parameters['newname'])
 437
 438     def on_channel_rename(self, oldname, newname):
 439         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 440         self.channel_edit_input_menu.foreach(self.rename_channels,
 441             rename_parameters)
 442         self.channel_edit_output_menu.foreach(self.rename_channels,
 443             rename_parameters)
 444         self.channel_remove_input_menu.foreach(self.rename_channels,
 445             rename_parameters)
 446         self.channel_remove_output_menu.foreach(self.rename_channels,
 447             rename_parameters)
 448         log.debug('Renaming channel from "%s" to "%s".', oldname, newname)
 449
 450     def on_channels_clear(self, widget):
 451         dlg = Gtk.MessageDialog(parent = self.window,
 452                 modal = True,
 453                 message_type = Gtk.MessageType.WARNING,
 454                 text = "Are you sure you want to clear all channels?",
 455                 buttons = Gtk.ButtonsType.OK_CANCEL)
 456         if not widget or dlg.run() == Gtk.ResponseType.OK:
 457             for channel in self.output_channels:
 458                 channel.unrealize()
 459                 self.hbox_outputs.remove(channel.get_parent())
 460             for channel in self.channels:
 461                 channel.unrealize()
 462                 self.hbox_inputs.remove(channel.get_parent())
 463             self.channels = []
 464             self.output_channels = []
 465             self.channel_edit_input_menu = Gtk.Menu()
 466             self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 467             self.channel_edit_input_menu_item.set_sensitive(False)
 468             self.channel_remove_input_menu = Gtk.Menu()
 469             self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 470             self.channel_remove_input_menu_item.set_sensitive(False)
 471             self.channel_edit_output_menu = Gtk.Menu()
 472             self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 473             self.channel_edit_output_menu_item.set_sensitive(False)
 474             self.channel_remove_output_menu = Gtk.Menu()
 475             self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 476             self.channel_remove_output_menu_item.set_sensitive(False)
 477         dlg.destroy()
 478
 479     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc, value):
 480         try:
 481             channel = InputChannel(self, name, stereo, value)
 482             self.add_channel_precreated(channel)
 483         except Exception:
 484             error_dialog(self.window, "Channel creation failed.")
 485             return
 486         if volume_cc != -1:
 487             channel.channel.volume_midi_cc = volume_cc
 488         else:
 489             channel.channel.autoset_volume_midi_cc()
 490         if balance_cc != -1:
 491             channel.channel.balance_midi_cc = balance_cc
 492         else:
 493             channel.channel.autoset_balance_midi_cc()
 494         if mute_cc != -1:
 495             channel.channel.mute_midi_cc = mute_cc
 496         else:
 497             channel.channel.autoset_mute_midi_cc()
 498         if solo_cc != -1:
 499             channel.channel.solo_midi_cc = solo_cc
 500         else:
 501             channel.channel.autoset_solo_midi_cc()
 502
 503         return channel
 504
 505     def add_channel_precreated(self, channel):
 506         frame = Gtk.Frame()
 507         frame.add(channel)
 508         self.hbox_inputs.pack_start(frame, False, True, 0)
 509         channel.realize()
 510
 511         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 512         self.channel_edit_input_menu.append(channel_edit_menu_item)
 513         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 514         self.channel_edit_input_menu_item.set_sensitive(True)
 515
 516         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 517         self.channel_remove_input_menu.append(channel_remove_menu_item)
 518         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 519         self.channel_remove_input_menu_item.set_sensitive(True)
 520
 521         self.channels.append(channel)
 522
 523         for outputchannel in self.output_channels:
 524             channel.add_control_group(outputchannel)
 525
 526         # create post fader output channel matching the input channel
 527         channel.post_fader_output_channel = self.mixer.add_output_channel(
 528                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 529         channel.post_fader_output_channel.volume = 0
 530         channel.post_fader_output_channel.set_solo(channel.channel, True)
 531
 532         channel.connect('input-channel-order-changed', self.on_input_channel_order_changed)
 533
 534     def on_input_channel_order_changed(self, widget, source_name, dest_name):
 535         self.channels.clear()
 536
 537         channel_box = self.hbox_inputs
 538         frames = channel_box.get_children()
 539
 540         for f in frames:
 541             c = f.get_child()
 542             if source_name == c._channel_name:
 543                 source_frame = f
 544                 break
 545
 546         for f in frames:
 547             c = f.get_child()
 548             if (dest_name == c._channel_name):
 549                 pos = frames.index(f)
 550                 channel_box.reorder_child(source_frame, pos)
 551                 break
 552
 553         for frame in self.hbox_inputs.get_children():
 554             c = frame.get_child()
 555             self.channels.append(c)
 556
 557     def read_meters(self):
 558         for channel in self.channels:
 559             channel.read_meter()
 560         for channel in self.output_channels:
 561             channel.read_meter()
 562         return True
 563
 564     def midi_events_check(self):
 565         for channel in self.channels + self.output_channels:
 566             channel.midi_events_check()
 567         return True
 568
 569     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc,
 570             display_solo_buttons, color, value):
 571         try:
 572             channel = OutputChannel(self, name, stereo, value)
 573             channel.display_solo_buttons = display_solo_buttons
 574             channel.color = color
 575             self.add_output_channel_precreated(channel)
 576         except Exception:
 577             error_dialog(self.window, "Channel creation failed")
 578             return
 579
 580         if volume_cc != -1:
 581             channel.channel.volume_midi_cc = volume_cc
 582         else:
 583             channel.channel.autoset_volume_midi_cc()
 584         if balance_cc != -1:
 585             channel.channel.balance_midi_cc = balance_cc
 586         else:
 587             channel.channel.autoset_balance_midi_cc()
 588         if mute_cc != -1:
 589             channel.channel.mute_midi_cc = mute_cc
 590         else:
 591             channel.channel.autoset_mute_midi_cc()
 592
 593         return channel
 594
 595     def add_output_channel_precreated(self, channel):
 596         frame = Gtk.Frame()
 597         frame.add(channel)
 598         self.hbox_outputs.pack_end(frame, False, True, 0)
 599         self.hbox_outputs.reorder_child(frame, 0)
 600         channel.realize()
 601
 602         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 603         self.channel_edit_output_menu.append(channel_edit_menu_item)
 604         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 605         self.channel_edit_output_menu_item.set_sensitive(True)
 606
 607         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 608         self.channel_remove_output_menu.append(channel_remove_menu_item)
 609         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 610         self.channel_remove_output_menu_item.set_sensitive(True)
 611
 612         self.output_channels.append(channel)
 613         channel.connect('output-channel-order-changed', self.on_output_channel_order_changed)
 614
 615     def on_output_channel_order_changed(self, widget, source_name, dest_name):
 616         self.output_channels.clear()
 617         channel_box = self.hbox_outputs
 618
 619         frames = channel_box.get_children()
 620
 621         for f in frames:
 622             c = f.get_child()
 623             if source_name == c._channel_name:
 624                  source_frame = f
 625                  break
 626
 627         for f in frames:
 628             c = f.get_child()
 629             if (dest_name == c._channel_name):
 630                 pos = len(frames) - 1 - frames.index(f)
 631                 channel_box.reorder_child(source_frame, pos)
 632                 break
 633
 634         for frame in self.hbox_outputs.get_children():
 635             c = frame.get_child()
 636             self.output_channels.append(c)
 637
 638     _monitored_channel = None
 639     def get_monitored_channel(self):
 640         return self._monitored_channel
 641
 642     def set_monitored_channel(self, channel):
 643         if self._monitored_channel:
 644             if channel.channel.name == self._monitored_channel.channel.name:
 645                 return
 646         self._monitored_channel = channel
 647         if type(channel) is InputChannel:
 648             # reset all solo/mute settings
 649             for in_channel in self.channels:
 650                 self.monitor_channel.set_solo(in_channel.channel, False)
 651                 self.monitor_channel.set_muted(in_channel.channel, False)
 652             self.monitor_channel.set_solo(channel.channel, True)
 653             self.monitor_channel.prefader = True
 654         else:
 655             self.monitor_channel.prefader = False
 656         self.update_monitor(channel)
 657     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 658
 659     def update_monitor(self, channel):
 660         if self._monitored_channel is not channel:
 661             return
 662         self.monitor_channel.volume = channel.channel.volume
 663         self.monitor_channel.balance = channel.channel.balance
 664         if type(self.monitored_channel) is OutputChannel:
 665             # sync solo/muted channels
 666             for input_channel in self.channels:
 667                 self.monitor_channel.set_solo(input_channel.channel,
 668                                 channel.channel.is_solo(input_channel.channel))
 669                 self.monitor_channel.set_muted(input_channel.channel,
 670                                 channel.channel.is_muted(input_channel.channel))
 671
 672     def get_input_channel_by_name(self, name):
 673         for input_channel in self.channels:
 674             if input_channel.channel.name == name:
 675                 return input_channel
 676         return None
 677
 678     def on_about(self, *args):
 679         about = Gtk.AboutDialog()
 680         about.set_name('jack_mixer')
 681         about.set_copyright('Copyright © 2006-2020\nNedko Arnaudov, Frédéric Péters, Arnout Engelen, Daniel Sheeler')
 682         about.set_license('''\
 683 jack_mixer is free software; you can redistribute it and/or modify it
 684 under the terms of the GNU General Public License as published by the
 685 Free Software Foundation; either version 2 of the License, or (at your
 686 option) any later version.
 687
 688 jack_mixer is distributed in the hope that it will be useful, but
 689 WITHOUT ANY WARRANTY; without even the implied warranty of
 690 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 691 General Public License for more details.
 692
 693 You should have received a copy of the GNU General Public License along
 694 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 695 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 696         about.set_authors([
 697             'Nedko Arnaudov <nedko@arnaudov.name>',
 698             'Christopher Arndt <chris@chrisarndt.de>',
 699             'Arnout Engelen <arnouten@bzzt.net>',
 700             'John Hedges <john@drystone.co.uk>',
 701             'Olivier Humbert <trebmuh@tuxfamily.org>',
 702             'Sarah Mischke <sarah@spooky-online.de>',
 703             'Frédéric Péters <fpeters@0d.be>',
 704             'Daniel Sheeler <dsheeler@pobox.com>',
 705             'Athanasios Silis <athanasios.silis@gmail.com>',
 706         ])
 707         about.set_logo_icon_name('jack_mixer')
 708         about.set_website('https://rdio.space/jackmixer/')
 709
 710         about.run()
 711         about.destroy()
 712
 713     def save_to_xml(self, file):
 714         log.debug("Saving to XML...")
 715         b = XmlSerialization()
 716         s = Serializator()
 717         s.serialize(self, b)
 718         b.save(file)
 719
 720     def load_from_xml(self, file, silence_errors=False, from_nsm=False):
 721         log.debug("Loading from XML...")
 722         self.unserialized_channels = []
 723         b = XmlSerialization()
 724         try:
 725             b.load(file)
 726         except:
 727             if silence_errors:
 728                 return
 729             raise
 730         self.on_channels_clear(None)
 731         s = Serializator()
 732         s.unserialize(self, b)
 733         for channel in self.unserialized_channels:
 734             if isinstance(channel, InputChannel):
 735                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 736                     channel.solo = True
 737                 self.add_channel_precreated(channel)
 738         self._init_solo_channels = None
 739         for channel in self.unserialized_channels:
 740             if isinstance(channel, OutputChannel):
 741                 self.add_output_channel_precreated(channel)
 742         del self.unserialized_channels
 743         width, height = self.window.get_size()
 744         if self.visible or not from_nsm:
 745             self.window.show_all()
 746         self.paned.set_position(self.paned_position/self.width*width)
 747         self.window.resize(self.width, self.height)
 748
 749     def serialize(self, object_backend):
 750         width, height = self.window.get_size()
 751         object_backend.add_property('geometry',
 752                         '%sx%s' % (width, height))
 753         pos = self.paned.get_position()
 754         object_backend.add_property('paned_position', '%s' % pos)
 755         solo_channels = []
 756         for input_channel in self.channels:
 757             if input_channel.channel.solo:
 758                 solo_channels.append(input_channel)
 759         if solo_channels:
 760             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 761         object_backend.add_property('visible', '%s' % str(self.visible))
 762
 763     def unserialize_property(self, name, value):
 764         if name == 'geometry':
 765             width, height = value.split('x')
 766             self.width = int(width)
 767             self.height = int(height)
 768             return True
 769         if name == 'solo_channels':
 770             self._init_solo_channels = value.split('|')
 771             return True
 772         if name == 'visible':
 773             self.visible = value == 'True'
 774             return True
 775         if name == 'paned_position':
 776             self.paned_position = int(value)
 777             return True
 778         return False
 779
 780     def unserialize_child(self, name):
 781         if name == InputChannel.serialization_name():
 782             channel = InputChannel(self, "", True)
 783             self.unserialized_channels.append(channel)
 784             return channel
 785
 786         if name == OutputChannel.serialization_name():
 787             channel = OutputChannel(self, "", True)
 788             self.unserialized_channels.append(channel)
 789             return channel
 790
 791         if name == gui.Factory.serialization_name():
 792             return self.gui_factory
 793
 794     def serialization_get_childs(self):
 795         '''Get child objects that required and support serialization'''
 796         childs = self.channels[:] + self.output_channels[:] + [self.gui_factory]
 797         return childs
 798
 799     def serialization_name(self):
 800         return "jack_mixer"
 801
 802     def main(self):
 803         if not self.mixer:
 804             return
 805
 806         if self.visible or self.nsm_client == None:
 807             width, height = self.window.get_size()
 808             self.window.show_all()
 809             if hasattr(self, 'paned_position'):
 810                 self.paned.set_position(self.paned_position/self.width*width)
 811
 812         signal.signal(signal.SIGUSR1, self.sighandler)
 813         signal.signal(signal.SIGTERM, self.sighandler)
 814         signal.signal(signal.SIGINT, self.sighandler)
 815         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 816
 817         Gtk.main()
 818
 819 def error_dialog(parent, msg, *args):
 820     log.exception(msg, *args)
 821     err = Gtk.MessageDialog(parent=parent, modal=True, destroy_with_parent=True,
 822         message_type=Gtk.MessageType.ERROR, buttons=Gtk.ButtonsType.OK, text=msg % args)
 823     err.run()
 824     err.destroy()
 825
 826 def main():
 827     parser = ArgumentParser()
 828     parser.add_argument('-c', '--config', metavar="FILE", help='load mixer project configuration from FILE')
 829     parser.add_argument('-d', '--debug', action="store_true", help='enable debug logging messages')
 830     parser.add_argument('client_name', metavar='NAME', nargs='?', default='jack_mixer',
 831                         help='set JACK client name')
 832     args = parser.parse_args()
 833
 834     logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO,
 835                         format="%(levelname)s: %(message)s")
 836
 837     try:
 838         mixer = JackMixer(args.client_name)
 839     except Exception as e:
 840         error_dialog(None, "Mixer creation failed (%s).", e)
 841         sys.exit(1)
 842
 843     if not mixer.nsm_client and args.config:
 844         f = open(args.config)
 845         mixer.current_filename = args.config
 846
 847         try:
 848             mixer.load_from_xml(f)
 849         except Exception as e:
 850             error_dialog(mixer.window, "Failed loading settings (%s).", e)
 851
 852         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 853         f.close()
 854
 855     mixer.main()
 856
 857     mixer.cleanup()
 858
 859 if __name__ == "__main__":
 860     main()