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 re
  25 import signal
  26 import sys
  27 from argparse import ArgumentParser
  28
  29 import gi
  30 gi.require_version('Gtk', '3.0')
  31 from gi.repository import Gtk
  32 from gi.repository import GObject
  33 from gi.repository import GLib
  34
  35 # temporary change Python modules lookup path to look into installation
  36 # directory ($prefix/share/jack_mixer/)
  37 old_path = sys.path
  38 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '..', 'share', 'jack_mixer'))
  39
  40 import jack_mixer_c
  41
  42 import gui
  43 import scale
  44 from channel import *
  45 from nsmclient import NSMClient
  46 from serialization_xml import XmlSerialization
  47 from serialization import SerializedObject, Serializator
  48 from preferences import PreferencesDialog
  49 from version import __version__
  50
  51
  52 # restore Python modules lookup path
  53 sys.path = old_path
  54 log = logging.getLogger("jack_mixer")
  55
  56
  57 def add_number_suffix(s):
  58     def inc(match):
  59         return str(int(match.group(0)) + 1)
  60
  61     new_s = re.sub('(\d+)\s*$', inc, s)
  62     if new_s == s:
  63         new_s = s + ' 1'
  64
  65     return new_s
  66
  67
  68 class JackMixer(SerializedObject):
  69
  70     # scales suitable as meter scales
  71     meter_scales = [
  72         scale.K20(),
  73         scale.K14(),
  74         scale.IEC268(),
  75         scale.Linear70dB(),
  76         scale.IEC268Minimalistic()
  77     ]
  78
  79     # scales suitable as volume slider scales
  80     slider_scales = [
  81         scale.Linear30dB(),
  82         scale.Linear70dB()
  83     ]
  84
  85     # name of settings file that is currently open
  86     current_filename = None
  87
  88     _init_solo_channels = None
  89
  90     def __init__(self, client_name='jack_mixer'):
  91         self.visible = False
  92         self.nsm_client = None
  93
  94         if os.environ.get('NSM_URL'):
  95             self.nsm_client = NSMClient(
  96                 prettyName="jack_mixer",
  97                 saveCallback=self.nsm_save_cb,
  98                 openOrNewCallback=self.nsm_open_cb,
  99                 supportsSaveStatus=False,
 100                 hideGUICallback=self.nsm_hide_cb,
 101                 showGUICallback=self.nsm_show_cb,
 102                 exitProgramCallback=self.nsm_exit_cb,
 103                 loggingLevel="error",
 104             )
 105             self.nsm_client.announceGuiVisibility(self.visible)
 106         else:
 107             self.visible = True
 108             self.create_mixer(client_name, with_nsm=False)
 109
 110     def create_mixer(self, client_name, with_nsm=True):
 111         self.mixer = jack_mixer_c.Mixer(client_name)
 112         if not self.mixer:
 113             raise RuntimeError("Failed to create Mixer instance.")
 114
 115         self.create_ui(with_nsm)
 116         self.window.set_title(client_name)
 117
 118         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
 119         self.save = False
 120
 121         GLib.timeout_add(33, self.read_meters)
 122         GLib.timeout_add(50, self.midi_events_check)
 123
 124         if with_nsm:
 125             GLib.timeout_add(200, self.nsm_react)
 126
 127     def new_menu_item(self, title, callback=None, accel=None, enabled=True):
 128         menuitem = Gtk.MenuItem.new_with_mnemonic(title)
 129         menuitem.set_sensitive(enabled)
 130         if callback:
 131             menuitem.connect("activate", callback)
 132         if accel:
 133             key, mod = Gtk.accelerator_parse(accel)
 134             menuitem.add_accelerator("activate", self.menu_accelgroup, key, mod,
 135                                      Gtk.AccelFlags.VISIBLE)
 136         return menuitem
 137
 138     def create_ui(self, with_nsm):
 139         self.channels = []
 140         self.output_channels = []
 141         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
 142         self.window.set_icon_name('jack_mixer')
 143         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
 144         self.gui_factory.connect('midi-behavior-mode-changed', self.on_midi_behavior_mode_changed)
 145         self.gui_factory.emit_midi_behavior_mode()
 146
 147         self.vbox_top = Gtk.VBox()
 148         self.window.add(self.vbox_top)
 149
 150         self.menu_accelgroup = Gtk.AccelGroup()
 151         self.window.add_accel_group(self.menu_accelgroup)
 152
 153         self.menubar = Gtk.MenuBar()
 154         self.vbox_top.pack_start(self.menubar, False, True, 0)
 155
 156         mixer_menu_item = Gtk.MenuItem.new_with_mnemonic("_Mixer")
 157         self.menubar.append(mixer_menu_item)
 158         edit_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit')
 159         self.menubar.append(edit_menu_item)
 160         help_menu_item = Gtk.MenuItem.new_with_mnemonic('_Help')
 161         self.menubar.append(help_menu_item)
 162
 163         self.width = 420
 164         self.height = 420
 165         self.paned_position = 210
 166         self.window.set_default_size(self.width, self.height)
 167
 168         self.mixer_menu = Gtk.Menu()
 169         mixer_menu_item.set_submenu(self.mixer_menu)
 170
 171         self.mixer_menu.append(self.new_menu_item('New _Input Channel',
 172                                                   self.on_add_input_channel, "<Control>N"))
 173         self.mixer_menu.append(self.new_menu_item('New Output _Channel',
 174                                                   self.on_add_output_channel, "<Shift><Control>N"))
 175
 176         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 177         if not with_nsm:
 178             self.mixer_menu.append(self.new_menu_item('_Open...', self.on_open_cb, "<Control>O"))
 179
 180         self.mixer_menu.append(self.new_menu_item('_Save', self.on_save_cb, "<Control>S"))
 181
 182         if not with_nsm:
 183             self.mixer_menu.append(self.new_menu_item('Save _As...', self.on_save_as_cb,
 184                                                       "<Shift><Control>S"))
 185
 186         self.mixer_menu.append(Gtk.SeparatorMenuItem())
 187         if with_nsm:
 188             self.mixer_menu.append(self.new_menu_item('_Hide', self.nsm_hide_cb, "<Control>W"))
 189         else:
 190             self.mixer_menu.append(self.new_menu_item('_Quit', self.on_quit_cb, "<Control>Q"))
 191
 192         edit_menu = Gtk.Menu()
 193         edit_menu_item.set_submenu(edit_menu)
 194
 195         self.channel_edit_input_menu_item = self.new_menu_item('_Edit Input Channel',
 196                                                                enabled=False)
 197         edit_menu.append(self.channel_edit_input_menu_item)
 198         self.channel_edit_input_menu = Gtk.Menu()
 199         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 200
 201         self.channel_edit_output_menu_item = self.new_menu_item('E_dit Output Channel',
 202                                                                 enabled=False)
 203         edit_menu.append(self.channel_edit_output_menu_item)
 204         self.channel_edit_output_menu = Gtk.Menu()
 205         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 206
 207         self.channel_remove_input_menu_item = self.new_menu_item('_Remove Input Channel',
 208                                                                  enabled=False)
 209         edit_menu.append(self.channel_remove_input_menu_item)
 210         self.channel_remove_input_menu = Gtk.Menu()
 211         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 212
 213         self.channel_remove_output_menu_item = self.new_menu_item('Re_move Output Channel',
 214                                                                   enabled=False)
 215         edit_menu.append(self.channel_remove_output_menu_item)
 216         self.channel_remove_output_menu = Gtk.Menu()
 217         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 218
 219         edit_menu.append(Gtk.SeparatorMenuItem())
 220         edit_menu.append(self.new_menu_item('Shrink Input Channels', self.on_narrow_input_channels_cb, "<Control>minus"))
 221         edit_menu.append(self.new_menu_item('Expand Input Channels', self.on_widen_input_channels_cb, "<Control>plus"))
 222         edit_menu.append(Gtk.SeparatorMenuItem())
 223
 224         edit_menu.append(self.new_menu_item('_Clear', self.on_channels_clear, "<Control>X"))
 225         edit_menu.append(Gtk.SeparatorMenuItem())
 226         edit_menu.append(self.new_menu_item('_Preferences', self.on_preferences_cb, "<Control>P"))
 227
 228         help_menu = Gtk.Menu()
 229         help_menu_item.set_submenu(help_menu)
 230
 231         help_menu.append(self.new_menu_item('_About', self.on_about, "F1"))
 232
 233         self.hbox_top = Gtk.HBox()
 234         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 235
 236         self.scrolled_window = Gtk.ScrolledWindow()
 237         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 238
 239         self.hbox_inputs = Gtk.Box()
 240         self.hbox_inputs.set_spacing(0)
 241         self.hbox_inputs.set_border_width(0)
 242         self.hbox_top.set_spacing(0)
 243         self.hbox_top.set_border_width(0)
 244         self.scrolled_window.add(self.hbox_inputs)
 245         self.hbox_outputs = Gtk.Box()
 246         self.hbox_outputs.set_spacing(0)
 247         self.hbox_outputs.set_border_width(0)
 248         self.scrolled_output = Gtk.ScrolledWindow()
 249         self.scrolled_output.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 250         self.scrolled_output.add(self.hbox_outputs)
 251         self.paned = Gtk.HPaned()
 252         self.paned.set_wide_handle(True)
 253         self.hbox_top.pack_start(self.paned, True, True, 0)
 254         self.paned.pack1(self.scrolled_window, True, False)
 255         self.paned.pack2(self.scrolled_output, True, False)
 256         self.window.connect("destroy", Gtk.main_quit)
 257         self.window.connect('delete-event', self.on_delete_event)
 258
 259     def nsm_react(self):
 260         self.nsm_client.reactToMessage()
 261         return True
 262
 263     def nsm_hide_cb(self, *args):
 264         self.window.hide()
 265         self.visible = False
 266         self.nsm_client.announceGuiVisibility(False)
 267
 268     def nsm_show_cb(self):
 269         width, height = self.window.get_size()
 270         self.window.show_all()
 271         self.paned.set_position(self.paned_position/self.width*width)
 272
 273         self.visible = True
 274         self.nsm_client.announceGuiVisibility(True)
 275
 276     def nsm_open_cb(self, path, session_name, client_name):
 277         self.create_mixer(client_name, with_nsm=True)
 278         self.current_filename = path + '.xml'
 279         if os.path.isfile(self.current_filename):
 280             try:
 281                 with open(self.current_filename, 'r') as fp:
 282                     self.load_from_xml(fp, from_nsm=True)
 283             except Exception as exc:
 284                 # Re-raise with more meaningful error message
 285                 raise IOError("Error loading settings file '{}': {}".format(
 286                               self.current_filename, exc))
 287
 288     def nsm_save_cb(self, path, session_name, client_name):
 289         self.current_filename = path + '.xml'
 290         f = open(self.current_filename, 'w')
 291         self.save_to_xml(f)
 292         f.close()
 293
 294     def nsm_exit_cb(self, path, session_name, client_name):
 295         Gtk.main_quit()
 296
 297     def on_midi_behavior_mode_changed(self, gui_factory, value):
 298         self.mixer.midi_behavior_mode = value
 299
 300     def on_delete_event(self, widget, event):
 301         if self.nsm_client:
 302             self.nsm_hide_cb()
 303             return True
 304
 305         return self.on_quit_cb()
 306
 307     def sighandler(self, signum, frame):
 308         log.debug("Signal %d received.", signum)
 309         if signum == signal.SIGUSR1:
 310             self.save = True
 311         elif signum == signal.SIGTERM:
 312             self.on_quit_cb()
 313         elif signum == signal.SIGINT:
 314             self.on_quit_cb()
 315         else:
 316             log.warning("Unknown signal %d received.", signum)
 317
 318     def cleanup(self):
 319         log.debug("Cleaning jack_mixer.")
 320         if not self.mixer:
 321             return
 322
 323         for channel in self.channels:
 324             channel.unrealize()
 325
 326         self.mixer.destroy()
 327
 328     def on_open_cb(self, *args):
 329         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 330                         action=Gtk.FileChooserAction.OPEN)
 331         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 332                         Gtk.STOCK_OPEN, Gtk.ResponseType.OK)
 333         dlg.set_default_response(Gtk.ResponseType.OK)
 334         if dlg.run() == Gtk.ResponseType.OK:
 335             filename = dlg.get_filename()
 336             try:
 337                 with open(filename, 'r') as fp:
 338                     self.load_from_xml(fp)
 339             except Exception as exc:
 340                 error_dialog(self.window, "Error loading settings file '%s': %s", filename, exc)
 341             else:
 342                 self.current_filename = filename
 343         dlg.destroy()
 344
 345     def on_save_cb(self, *args):
 346         if not self.current_filename:
 347             return self.on_save_as_cb()
 348         f = open(self.current_filename, 'w')
 349         self.save_to_xml(f)
 350         f.close()
 351
 352     def on_save_as_cb(self, *args):
 353         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 354                         action=Gtk.FileChooserAction.SAVE)
 355         dlg.add_buttons(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 356                         Gtk.STOCK_SAVE, Gtk.ResponseType.OK)
 357         dlg.set_default_response(Gtk.ResponseType.OK)
 358         if dlg.run() == Gtk.ResponseType.OK:
 359             self.current_filename = dlg.get_filename()
 360             self.on_save_cb()
 361         dlg.destroy()
 362
 363     def on_quit_cb(self, *args):
 364         if not self.nsm_client and self.gui_factory.get_confirm_quit():
 365             dlg = Gtk.MessageDialog(parent=self.window,
 366                                     message_type=Gtk.MessageType.QUESTION,
 367                                     buttons=Gtk.ButtonsType.NONE)
 368             dlg.set_markup("<b>Quit application?</b>")
 369             dlg.format_secondary_markup("All jack_mixer ports will be closed and connections lost,"
 370                                         "\nstopping all sound going through jack_mixer.\n\n"
 371                                         "Are you sure?")
 372             dlg.add_buttons(
 373                 Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 374                 Gtk.STOCK_QUIT, Gtk.ResponseType.OK
 375             )
 376             response = dlg.run()
 377             dlg.destroy()
 378             if response != Gtk.ResponseType.OK:
 379                 return True
 380
 381         Gtk.main_quit()
 382
 383     def on_narrow_input_channels_cb(self, widget):
 384         for channel in self.channels:
 385             channel.narrow()
 386
 387     def on_widen_input_channels_cb(self, widget):
 388         for channel in self.channels:
 389             channel.widen()
 390
 391     preferences_dialog = None
 392     def on_preferences_cb(self, widget):
 393         if not self.preferences_dialog:
 394             self.preferences_dialog = PreferencesDialog(self)
 395         self.preferences_dialog.show()
 396         self.preferences_dialog.present()
 397
 398     def on_add_channel(self, inout="input", default_name="Input"):
 399         dialog = getattr(self, '_add_{}_dialog'.format(inout), None)
 400         values = getattr(self, '_add_{}_values'.format(inout), {})
 401
 402         if dialog == None:
 403             cls = NewInputChannelDialog if inout == 'input' else NewOutputChannelDialog
 404             dialog = cls(app=self)
 405             setattr(self, '_add_{}_dialog'.format(inout), dialog)
 406
 407         names = {ch.channel_name
 408                  for ch in (self.channels if inout == 'input' else self.output_channels)}
 409         values.setdefault('name', default_name)
 410         while True:
 411             if values['name'] in names:
 412                 values['name'] = add_number_suffix(values['name'])
 413             else:
 414                 break
 415
 416         dialog.fill_ui(**values)
 417         dialog.set_transient_for(self.window)
 418         dialog.show()
 419         ret = dialog.run()
 420         dialog.hide()
 421
 422         if ret == Gtk.ResponseType.OK:
 423             result = dialog.get_result()
 424             setattr(self, '_add_{}_values'.format(inout), result)
 425             method = getattr(self, 'add_channel' if inout == 'input' else 'add_output_channel')
 426             channel = method(**result)
 427             if self.visible or self.nsm_client == None:
 428                 self.window.show_all()
 429
 430     def on_add_input_channel(self, widget):
 431         return self.on_add_channel("input", "Input")
 432
 433     def on_add_output_channel(self, widget):
 434         return self.on_add_channel("output", "Output")
 435
 436     def on_edit_input_channel(self, widget, channel):
 437         log.debug('Editing input channel "%s".', channel.channel_name)
 438         channel.on_channel_properties()
 439
 440     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 441         if (widget.get_label() == label):
 442             self.channel_edit_input_menu.remove(widget)
 443
 444     def on_remove_input_channel(self, widget, channel):
 445         log.debug('Removing input channel "%s".', channel.channel_name)
 446         self.channel_remove_input_menu.remove(widget)
 447         self.channel_edit_input_menu.foreach(
 448             self.remove_channel_edit_input_menuitem_by_label,
 449             channel.channel_name);
 450         if self.monitored_channel is channel:
 451             channel.monitor_button.set_active(False)
 452         for i in range(len(self.channels)):
 453             if self.channels[i] is channel:
 454                 channel.unrealize()
 455                 del self.channels[i]
 456                 self.hbox_inputs.remove(channel.get_parent())
 457                 break
 458         if not self.channels:
 459             self.channel_edit_input_menu_item.set_sensitive(False)
 460             self.channel_remove_input_menu_item.set_sensitive(False)
 461
 462     def on_edit_output_channel(self, widget, channel):
 463         log.debug('Editing output channel "%s".', channel.channel_name)
 464         channel.on_channel_properties()
 465
 466     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 467         if (widget.get_label() == label):
 468             self.channel_edit_output_menu.remove(widget)
 469
 470     def on_remove_output_channel(self, widget, channel):
 471         log.debug('Removing output channel "%s".', channel.channel_name)
 472         self.channel_remove_output_menu.remove(widget)
 473         self.channel_edit_output_menu.foreach(
 474             self.remove_channel_edit_output_menuitem_by_label,
 475             channel.channel_name);
 476         if self.monitored_channel is channel:
 477             channel.monitor_button.set_active(False)
 478         for i in range(len(self.channels)):
 479             if self.output_channels[i] is channel:
 480                 channel.unrealize()
 481                 del self.output_channels[i]
 482                 self.hbox_outputs.remove(channel.get_parent())
 483                 break
 484         if not self.output_channels:
 485             self.channel_edit_output_menu_item.set_sensitive(False)
 486             self.channel_remove_output_menu_item.set_sensitive(False)
 487
 488     def rename_channels(self, container, parameters):
 489         if (container.get_label() == parameters['oldname']):
 490             container.set_label(parameters['newname'])
 491
 492     def on_channel_rename(self, oldname, newname):
 493         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 494         self.channel_edit_input_menu.foreach(self.rename_channels,
 495             rename_parameters)
 496         self.channel_edit_output_menu.foreach(self.rename_channels,
 497             rename_parameters)
 498         self.channel_remove_input_menu.foreach(self.rename_channels,
 499             rename_parameters)
 500         self.channel_remove_output_menu.foreach(self.rename_channels,
 501             rename_parameters)
 502         log.debug('Renaming channel from "%s" to "%s".', oldname, newname)
 503
 504     def on_channels_clear(self, widget):
 505         dlg = Gtk.MessageDialog(parent = self.window,
 506                 modal = True,
 507                 message_type = Gtk.MessageType.WARNING,
 508                 text = "Are you sure you want to clear all channels?",
 509                 buttons = Gtk.ButtonsType.OK_CANCEL)
 510         if not widget or dlg.run() == Gtk.ResponseType.OK:
 511             for channel in self.output_channels:
 512                 channel.unrealize()
 513                 self.hbox_outputs.remove(channel.get_parent())
 514             for channel in self.channels:
 515                 channel.unrealize()
 516                 self.hbox_inputs.remove(channel.get_parent())
 517             self.channels = []
 518             self.output_channels = []
 519             self.channel_edit_input_menu = Gtk.Menu()
 520             self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 521             self.channel_edit_input_menu_item.set_sensitive(False)
 522             self.channel_remove_input_menu = Gtk.Menu()
 523             self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 524             self.channel_remove_input_menu_item.set_sensitive(False)
 525             self.channel_edit_output_menu = Gtk.Menu()
 526             self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 527             self.channel_edit_output_menu_item.set_sensitive(False)
 528             self.channel_remove_output_menu = Gtk.Menu()
 529             self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 530             self.channel_remove_output_menu_item.set_sensitive(False)
 531         dlg.destroy()
 532
 533     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc, value):
 534         try:
 535             channel = InputChannel(self, name, stereo, value)
 536             self.add_channel_precreated(channel)
 537         except Exception:
 538             error_dialog(self.window, "Channel creation failed.")
 539             return
 540         if volume_cc != -1:
 541             channel.channel.volume_midi_cc = volume_cc
 542         else:
 543             channel.channel.autoset_volume_midi_cc()
 544         if balance_cc != -1:
 545             channel.channel.balance_midi_cc = balance_cc
 546         else:
 547             channel.channel.autoset_balance_midi_cc()
 548         if mute_cc != -1:
 549             channel.channel.mute_midi_cc = mute_cc
 550         else:
 551             channel.channel.autoset_mute_midi_cc()
 552         if solo_cc != -1:
 553             channel.channel.solo_midi_cc = solo_cc
 554         else:
 555             channel.channel.autoset_solo_midi_cc()
 556
 557         return channel
 558
 559     def add_channel_precreated(self, channel):
 560         frame = Gtk.Frame()
 561         frame.add(channel)
 562         self.hbox_inputs.pack_start(frame, False, True, 0)
 563         channel.realize()
 564
 565         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 566         self.channel_edit_input_menu.append(channel_edit_menu_item)
 567         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 568         self.channel_edit_input_menu_item.set_sensitive(True)
 569
 570         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 571         self.channel_remove_input_menu.append(channel_remove_menu_item)
 572         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 573         self.channel_remove_input_menu_item.set_sensitive(True)
 574
 575         self.channels.append(channel)
 576
 577         for outputchannel in self.output_channels:
 578             channel.add_control_group(outputchannel)
 579
 580         # create post fader output channel matching the input channel
 581         channel.post_fader_output_channel = self.mixer.add_output_channel(
 582                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 583         channel.post_fader_output_channel.volume = 0
 584         channel.post_fader_output_channel.set_solo(channel.channel, True)
 585
 586         channel.connect('input-channel-order-changed', self.on_input_channel_order_changed)
 587
 588     def on_input_channel_order_changed(self, widget, source_name, dest_name):
 589         self.channels.clear()
 590
 591         channel_box = self.hbox_inputs
 592         frames = channel_box.get_children()
 593
 594         for f in frames:
 595             c = f.get_child()
 596             if source_name == c._channel_name:
 597                 source_frame = f
 598                 break
 599
 600         for f in frames:
 601             c = f.get_child()
 602             if (dest_name == c._channel_name):
 603                 pos = frames.index(f)
 604                 channel_box.reorder_child(source_frame, pos)
 605                 break
 606
 607         for frame in self.hbox_inputs.get_children():
 608             c = frame.get_child()
 609             self.channels.append(c)
 610
 611     def read_meters(self):
 612         for channel in self.channels:
 613             channel.read_meter()
 614         for channel in self.output_channels:
 615             channel.read_meter()
 616         return True
 617
 618     def midi_events_check(self):
 619         for channel in self.channels + self.output_channels:
 620             channel.midi_events_check()
 621         return True
 622
 623     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc,
 624             display_solo_buttons, color, value):
 625         try:
 626             channel = OutputChannel(self, name, stereo, value)
 627             channel.display_solo_buttons = display_solo_buttons
 628             channel.color = color
 629             self.add_output_channel_precreated(channel)
 630         except Exception:
 631             error_dialog(self.window, "Channel creation failed")
 632             return
 633
 634         if volume_cc != -1:
 635             channel.channel.volume_midi_cc = volume_cc
 636         else:
 637             channel.channel.autoset_volume_midi_cc()
 638         if balance_cc != -1:
 639             channel.channel.balance_midi_cc = balance_cc
 640         else:
 641             channel.channel.autoset_balance_midi_cc()
 642         if mute_cc != -1:
 643             channel.channel.mute_midi_cc = mute_cc
 644         else:
 645             channel.channel.autoset_mute_midi_cc()
 646
 647         return channel
 648
 649     def add_output_channel_precreated(self, channel):
 650         frame = Gtk.Frame()
 651         frame.add(channel)
 652         self.hbox_outputs.pack_end(frame, False, True, 0)
 653         self.hbox_outputs.reorder_child(frame, 0)
 654         channel.realize()
 655
 656         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 657         self.channel_edit_output_menu.append(channel_edit_menu_item)
 658         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 659         self.channel_edit_output_menu_item.set_sensitive(True)
 660
 661         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 662         self.channel_remove_output_menu.append(channel_remove_menu_item)
 663         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 664         self.channel_remove_output_menu_item.set_sensitive(True)
 665
 666         self.output_channels.append(channel)
 667         channel.connect('output-channel-order-changed', self.on_output_channel_order_changed)
 668
 669     def on_output_channel_order_changed(self, widget, source_name, dest_name):
 670         self.output_channels.clear()
 671         channel_box = self.hbox_outputs
 672
 673         frames = channel_box.get_children()
 674
 675         for f in frames:
 676             c = f.get_child()
 677             if source_name == c._channel_name:
 678                  source_frame = f
 679                  break
 680
 681         for f in frames:
 682             c = f.get_child()
 683             if (dest_name == c._channel_name):
 684                 pos = len(frames) - 1 - frames.index(f)
 685                 channel_box.reorder_child(source_frame, pos)
 686                 break
 687
 688         for frame in self.hbox_outputs.get_children():
 689             c = frame.get_child()
 690             self.output_channels.append(c)
 691
 692     _monitored_channel = None
 693     def get_monitored_channel(self):
 694         return self._monitored_channel
 695
 696     def set_monitored_channel(self, channel):
 697         if self._monitored_channel:
 698             if channel.channel.name == self._monitored_channel.channel.name:
 699                 return
 700         self._monitored_channel = channel
 701         if type(channel) is InputChannel:
 702             # reset all solo/mute settings
 703             for in_channel in self.channels:
 704                 self.monitor_channel.set_solo(in_channel.channel, False)
 705                 self.monitor_channel.set_muted(in_channel.channel, False)
 706             self.monitor_channel.set_solo(channel.channel, True)
 707             self.monitor_channel.prefader = True
 708         else:
 709             self.monitor_channel.prefader = False
 710         self.update_monitor(channel)
 711     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 712
 713     def update_monitor(self, channel):
 714         if self._monitored_channel is not channel:
 715             return
 716         self.monitor_channel.volume = channel.channel.volume
 717         self.monitor_channel.balance = channel.channel.balance
 718         if type(self.monitored_channel) is OutputChannel:
 719             # sync solo/muted channels
 720             for input_channel in self.channels:
 721                 self.monitor_channel.set_solo(input_channel.channel,
 722                                 channel.channel.is_solo(input_channel.channel))
 723                 self.monitor_channel.set_muted(input_channel.channel,
 724                                 channel.channel.is_muted(input_channel.channel))
 725
 726     def get_input_channel_by_name(self, name):
 727         for input_channel in self.channels:
 728             if input_channel.channel.name == name:
 729                 return input_channel
 730         return None
 731
 732     def on_about(self, *args):
 733         about = Gtk.AboutDialog()
 734         about.set_name('jack_mixer')
 735         about.set_program_name('jack_mixer')
 736         about.set_copyright('Copyright © 2006-2020\nNedko Arnaudov, Frédéric Péters, Arnout Engelen, Daniel Sheeler')
 737         about.set_license("""\
 738 jack_mixer is free software; you can redistribute it and/or modify it
 739 under the terms of the GNU General Public License as published by the
 740 Free Software Foundation; either version 2 of the License, or (at your
 741 option) any later version.
 742
 743 jack_mixer is distributed in the hope that it will be useful, but
 744 WITHOUT ANY WARRANTY; without even the implied warranty of
 745 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 746 General Public License for more details.
 747
 748 You should have received a copy of the GNU General Public License along
 749 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 750 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA""")
 751         about.set_authors([
 752             'Nedko Arnaudov <nedko@arnaudov.name>',
 753             'Christopher Arndt <chris@chrisarndt.de>',
 754             'Arnout Engelen <arnouten@bzzt.net>',
 755             'John Hedges <john@drystone.co.uk>',
 756             'Olivier Humbert <trebmuh@tuxfamily.org>',
 757             'Sarah Mischke <sarah@spooky-online.de>',
 758             'Frédéric Péters <fpeters@0d.be>',
 759             'Daniel Sheeler <dsheeler@pobox.com>',
 760             'Athanasios Silis <athanasios.silis@gmail.com>',
 761         ])
 762         about.set_logo_icon_name('jack_mixer')
 763         about.set_version(__version__)
 764         about.set_website('https://rdio.space/jackmixer/')
 765
 766         about.run()
 767         about.destroy()
 768
 769     def save_to_xml(self, file):
 770         log.debug("Saving to XML...")
 771         b = XmlSerialization()
 772         s = Serializator()
 773         s.serialize(self, b)
 774         b.save(file)
 775
 776     def load_from_xml(self, file, silence_errors=False, from_nsm=False):
 777         log.debug("Loading from XML...")
 778         self.unserialized_channels = []
 779         b = XmlSerialization()
 780         try:
 781             b.load(file)
 782         except:
 783             if silence_errors:
 784                 return
 785             raise
 786         self.on_channels_clear(None)
 787         s = Serializator()
 788         s.unserialize(self, b)
 789         for channel in self.unserialized_channels:
 790             if isinstance(channel, InputChannel):
 791                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 792                     channel.solo = True
 793                 self.add_channel_precreated(channel)
 794         self._init_solo_channels = None
 795         for channel in self.unserialized_channels:
 796             if isinstance(channel, OutputChannel):
 797                 self.add_output_channel_precreated(channel)
 798         del self.unserialized_channels
 799         width, height = self.window.get_size()
 800         if self.visible or not from_nsm:
 801             self.window.show_all()
 802         self.paned.set_position(self.paned_position/self.width*width)
 803         self.window.resize(self.width, self.height)
 804
 805     def serialize(self, object_backend):
 806         width, height = self.window.get_size()
 807         object_backend.add_property('geometry',
 808                         '%sx%s' % (width, height))
 809         pos = self.paned.get_position()
 810         object_backend.add_property('paned_position', '%s' % pos)
 811         solo_channels = []
 812         for input_channel in self.channels:
 813             if input_channel.channel.solo:
 814                 solo_channels.append(input_channel)
 815         if solo_channels:
 816             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 817         object_backend.add_property('visible', '%s' % str(self.visible))
 818
 819     def unserialize_property(self, name, value):
 820         if name == 'geometry':
 821             width, height = value.split('x')
 822             self.width = int(width)
 823             self.height = int(height)
 824             return True
 825         if name == 'solo_channels':
 826             self._init_solo_channels = value.split('|')
 827             return True
 828         if name == 'visible':
 829             self.visible = value == 'True'
 830             return True
 831         if name == 'paned_position':
 832             self.paned_position = int(value)
 833             return True
 834         return False
 835
 836     def unserialize_child(self, name):
 837         if name == InputChannel.serialization_name():
 838             channel = InputChannel(self, "", True)
 839             self.unserialized_channels.append(channel)
 840             return channel
 841
 842         if name == OutputChannel.serialization_name():
 843             channel = OutputChannel(self, "", True)
 844             self.unserialized_channels.append(channel)
 845             return channel
 846
 847         if name == gui.Factory.serialization_name():
 848             return self.gui_factory
 849
 850     def serialization_get_childs(self):
 851         '''Get child objects that required and support serialization'''
 852         childs = self.channels[:] + self.output_channels[:] + [self.gui_factory]
 853         return childs
 854
 855     def serialization_name(self):
 856         return "jack_mixer"
 857
 858     def main(self):
 859         if not self.mixer:
 860             return
 861
 862         if self.visible or self.nsm_client == None:
 863             width, height = self.window.get_size()
 864             self.window.show_all()
 865             if hasattr(self, 'paned_position'):
 866                 self.paned.set_position(self.paned_position/self.width*width)
 867
 868         signal.signal(signal.SIGUSR1, self.sighandler)
 869         signal.signal(signal.SIGTERM, self.sighandler)
 870         signal.signal(signal.SIGINT, self.sighandler)
 871         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 872
 873         Gtk.main()
 874
 875 def error_dialog(parent, msg, *args):
 876     log.exception(msg, *args)
 877     err = Gtk.MessageDialog(parent=parent, modal=True, destroy_with_parent=True,
 878         message_type=Gtk.MessageType.ERROR, buttons=Gtk.ButtonsType.OK, text=msg % args)
 879     err.run()
 880     err.destroy()
 881
 882 def main():
 883     parser = ArgumentParser()
 884     parser.add_argument('-c', '--config', metavar="FILE", help='load mixer project configuration from FILE')
 885     parser.add_argument('-d', '--debug', action="store_true", help='enable debug logging messages')
 886     parser.add_argument('client_name', metavar='NAME', nargs='?', default='jack_mixer',
 887                         help='set JACK client name')
 888     args = parser.parse_args()
 889
 890     logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO,
 891                         format="%(levelname)s: %(message)s")
 892
 893     try:
 894         mixer = JackMixer(args.client_name)
 895     except Exception as e:
 896         error_dialog(None, "Mixer creation failed:\n\n%s", e)
 897         sys.exit(1)
 898
 899     if not mixer.nsm_client and args.config:
 900         try:
 901             with open(args.config) as fp:
 902                 mixer.load_from_xml(fp)
 903         except Exception as exc:
 904             error_dialog(mixer.window, "Error loading settings file '%s': %s", args.config, exc)
 905         else:
 906             mixer.current_filename = args.config
 907
 908         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 909
 910     mixer.main()
 911
 912     mixer.cleanup()
 913
 914 if __name__ == "__main__":
 915     main()