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 from optparse import OptionParser
  23
  24 import gi
  25 gi.require_version('Gtk', '3.0')
  26 from gi.repository import Gtk
  27 from gi.repository import GObject
  28 from gi.repository import GLib
  29 import sys
  30 import os
  31 import signal
  32
  33 try:
  34     import lash
  35 except:
  36     lash = None
  37     print("Cannot load LASH python bindings, you want them unless you enjoy manual jack plumbing each time you use this app", file=sys.stderr)
  38
  39 # temporary change Python modules lookup path to look into installation
  40 # directory ($prefix/share/jack_mixer/)
  41 old_path = sys.path
  42 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), '..', 'share', 'jack_mixer'))
  43
  44
  45 import jack_mixer_c
  46
  47
  48 import scale
  49 from channel import *
  50
  51 import gui
  52 from preferences import PreferencesDialog
  53
  54 from serialization_xml import XmlSerialization
  55 from serialization import SerializedObject, Serializator
  56
  57 # restore Python modules lookup path
  58 sys.path = old_path
  59
  60 class JackMixer(SerializedObject):
  61
  62     # scales suitable as meter scales
  63     meter_scales = [scale.IEC268(), scale.Linear70dB(), scale.IEC268Minimalistic()]
  64
  65     # scales suitable as volume slider scales
  66     slider_scales = [scale.Linear30dB(), scale.Linear70dB()]
  67
  68     # name of settngs file that is currently open
  69     current_filename = None
  70
  71     _init_solo_channels = None
  72
  73     def __init__(self, name, lash_client):
  74         self.mixer = jack_mixer_c.Mixer(name)
  75         if not self.mixer:
  76             return
  77         self.monitor_channel = self.mixer.add_output_channel("Monitor", True, True)
  78
  79         self.save = False
  80
  81         if lash_client:
  82             # Send our client name to server
  83             lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
  84             lash.lash_event_set_string(lash_event, name)
  85             lash.lash_send_event(lash_client, lash_event)
  86
  87             lash.lash_jack_client_name(lash_client, name)
  88
  89         self.window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
  90         if name != self.mixer.client_name():
  91             self.window.set_title(name + " ("+ self.mixer.client_name()+")" )
  92         else:
  93             self.window.set_title(name)
  94
  95         self.window.set_icon_name('jack_mixer')
  96         self.gui_factory = gui.Factory(self.window, self.meter_scales, self.slider_scales)
  97
  98         self.vbox_top = Gtk.VBox()
  99         self.window.add(self.vbox_top)
 100
 101         self.menubar = Gtk.MenuBar()
 102         self.vbox_top.pack_start(self.menubar, False, True, 0)
 103
 104         mixer_menu_item = Gtk.MenuItem.new_with_mnemonic("_Mixer")
 105         self.menubar.append(mixer_menu_item)
 106         edit_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit')
 107         self.menubar.append(edit_menu_item)
 108         help_menu_item = Gtk.MenuItem.new_with_mnemonic('_Help')
 109         self.menubar.append(help_menu_item)
 110
 111         self.window.set_default_size(120, 300)
 112
 113         mixer_menu = Gtk.Menu()
 114         mixer_menu_item.set_submenu(mixer_menu)
 115
 116         add_input_channel = Gtk.MenuItem.new_with_mnemonic('New _Input Channel')
 117         mixer_menu.append(add_input_channel)
 118         add_input_channel.connect("activate", self.on_add_input_channel)
 119
 120         add_output_channel = Gtk.MenuItem.new_with_mnemonic('New _Output Channel')
 121         mixer_menu.append(add_output_channel)
 122         add_output_channel.connect("activate", self.on_add_output_channel)
 123
 124         mixer_menu.append(Gtk.SeparatorMenuItem())
 125         open = Gtk.MenuItem.new_with_mnemonic('_Open')
 126         mixer_menu.append(open)
 127         open.connect('activate', self.on_open_cb)
 128         save = Gtk.MenuItem.new_with_mnemonic('_Save')
 129         mixer_menu.append(save)
 130         save.connect('activate', self.on_save_cb)
 131         save_as = Gtk.MenuItem.new_with_mnemonic('Save_As')
 132         mixer_menu.append(save_as)
 133         save_as.connect('activate', self.on_save_as_cb)
 134
 135         mixer_menu.append(Gtk.SeparatorMenuItem())
 136
 137         quit = Gtk.MenuItem.new_with_mnemonic('_Quit')
 138         mixer_menu.append(quit)
 139         quit.connect('activate', self.on_quit_cb)
 140
 141         edit_menu = Gtk.Menu()
 142         edit_menu_item.set_submenu(edit_menu)
 143
 144         self.channel_edit_input_menu_item = Gtk.MenuItem.new_with_mnemonic('_Edit Input Channel')
 145         edit_menu.append(self.channel_edit_input_menu_item)
 146         self.channel_edit_input_menu = Gtk.Menu()
 147         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 148
 149         self.channel_edit_output_menu_item = Gtk.MenuItem.new_with_mnemonic('Edit _Output Channel')
 150         edit_menu.append(self.channel_edit_output_menu_item)
 151         self.channel_edit_output_menu = Gtk.Menu()
 152         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 153
 154         self.channel_remove_input_menu_item = Gtk.MenuItem.new_with_mnemonic('Remove _Input Channel')
 155         edit_menu.append(self.channel_remove_input_menu_item)
 156         self.channel_remove_input_menu = Gtk.Menu()
 157         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 158
 159         self.channel_remove_output_menu_item = Gtk.MenuItem.new_with_mnemonic('_Remove Output Channel')
 160         edit_menu.append(self.channel_remove_output_menu_item)
 161         self.channel_remove_output_menu = Gtk.Menu()
 162         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 163
 164         channel_remove_all_menu_item = Gtk.MenuItem.new_with_mnemonic('Clear')
 165         edit_menu.append(channel_remove_all_menu_item)
 166         channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
 167
 168         edit_menu.append(Gtk.SeparatorMenuItem())
 169
 170         preferences = Gtk.MenuItem.new_with_mnemonic('_Preferences')
 171         preferences.connect('activate', self.on_preferences_cb)
 172         edit_menu.append(preferences)
 173
 174         help_menu = Gtk.Menu()
 175         help_menu_item.set_submenu(help_menu)
 176
 177         about = Gtk.MenuItem.new_with_mnemonic('_About')
 178         help_menu.append(about)
 179         about.connect("activate", self.on_about)
 180
 181         self.hbox_top = Gtk.HBox()
 182         self.vbox_top.pack_start(self.hbox_top, True, True, 0)
 183
 184         self.scrolled_window = Gtk.ScrolledWindow()
 185         self.hbox_top.pack_start(self.scrolled_window, True, True, 0)
 186
 187         self.hbox_inputs = Gtk.HBox()
 188         self.hbox_inputs.set_spacing(0)
 189         self.hbox_inputs.set_border_width(0)
 190         self.hbox_top.set_spacing(0)
 191         self.hbox_top.set_border_width(0)
 192         self.channels = []
 193         self.output_channels = []
 194
 195         self.scrolled_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 196         self.scrolled_window.add(self.hbox_inputs)
 197
 198         self.hbox_outputs = Gtk.HBox()
 199         self.hbox_outputs.set_spacing(0)
 200         self.hbox_outputs.set_border_width(0)
 201         frame = Gtk.Frame()
 202         self.hbox_outputs.pack_start(frame, False, True, 0)
 203         self.hbox_top.pack_start(self.hbox_outputs, False, True, 0)
 204
 205         self.window.connect("destroy", Gtk.main_quit)
 206
 207         self.window.connect('delete-event', self.on_delete_event)
 208
 209         GLib.timeout_add(80, self.read_meters)
 210         self.lash_client = lash_client
 211
 212         GLib.timeout_add(200, self.lash_check_events)
 213
 214         GLib.timeout_add(50, self.midi_events_check)
 215
 216
 217     def on_delete_event(self, widget, event):
 218        if self.gui_factory.get_minimize_to_tray():
 219             self.window.hide()
 220             return True
 221        else:
 222            self.on_quit_cb()
 223            return False
 224
 225
 226     def sighandler(self, signum, frame):
 227         #print "Signal %d received" % signum
 228         if signum == signal.SIGUSR1:
 229             self.save = True
 230         elif signum == signal.SIGTERM:
 231             Gtk.main_quit()
 232         elif signum == signal.SIGINT:
 233             Gtk.main_quit()
 234         else:
 235             print("Unknown signal %d received" % signum)
 236
 237     def cleanup(self):
 238         print("Cleaning jack_mixer")
 239         if not self.mixer:
 240             return
 241
 242         for channel in self.channels:
 243             channel.unrealize()
 244
 245         self.mixer.destroy()
 246
 247     def on_open_cb(self, *args):
 248         dlg = Gtk.FileChooserDialog(title='Open', parent=self.window,
 249                         action=Gtk.FileChooserAction.OPEN,
 250                         buttons=(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 251                                  Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
 252         dlg.set_default_response(Gtk.ResponseType.OK)
 253         if dlg.run() == Gtk.ResponseType.OK:
 254             filename = dlg.get_filename()
 255             try:
 256                 f = file(filename, 'r')
 257                 self.load_from_xml(f)
 258             except:
 259                 err = Gtk.MessageDialog(self.window,
 260                             Gtk.DialogFlags.MODAL,
 261                             Gtk.MessageType.ERROR,
 262                             Gtk.ButtonsType.OK,
 263                             "Failed loading settings.")
 264                 err.run()
 265                 err.destroy()
 266             else:
 267                 self.current_filename = filename
 268             finally:
 269                 f.close()
 270         dlg.destroy()
 271
 272     def on_save_cb(self, *args):
 273         if not self.current_filename:
 274             return self.on_save_as_cb()
 275         f = file(self.current_filename, 'w')
 276         self.save_to_xml(f)
 277         f.close()
 278
 279     def on_save_as_cb(self, *args):
 280         dlg = Gtk.FileChooserDialog(title='Save', parent=self.window,
 281                         action=Gtk.FileChooserAction.SAVE,
 282                         buttons=(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
 283                                  Gtk.STOCK_SAVE, Gtk.ResponseType.OK))
 284         dlg.set_default_response(Gtk.ResponseType.OK)
 285         if dlg.run() == Gtk.ResponseType.OK:
 286             self.current_filename = dlg.get_filename()
 287             self.on_save_cb()
 288         dlg.destroy()
 289
 290     def on_quit_cb(self, *args):
 291         Gtk.main_quit()
 292
 293     preferences_dialog = None
 294     def on_preferences_cb(self, widget):
 295         if not self.preferences_dialog:
 296             self.preferences_dialog = PreferencesDialog(self)
 297         self.preferences_dialog.show()
 298         self.preferences_dialog.present()
 299
 300     def on_add_input_channel(self, widget):
 301         dialog = NewChannelDialog(app=self)
 302         dialog.set_transient_for(self.window)
 303         dialog.show()
 304         ret = dialog.run()
 305         dialog.hide()
 306
 307         if ret == Gtk.ResponseType.OK:
 308             result = dialog.get_result()
 309             channel = self.add_channel(**result)
 310             self.window.show_all()
 311
 312     def on_add_output_channel(self, widget):
 313         dialog = NewOutputChannelDialog(app=self)
 314         dialog.set_transient_for(self.window)
 315         dialog.show()
 316         ret = dialog.run()
 317         dialog.hide()
 318
 319         if ret == Gtk.ResponseType.OK:
 320             result = dialog.get_result()
 321             channel = self.add_output_channel(**result)
 322             self.window.show_all()
 323
 324     def on_edit_input_channel(self, widget, channel):
 325         print('Editing channel "%s"' % channel.channel_name)
 326         channel.on_channel_properties()
 327
 328     def remove_channel_edit_input_menuitem_by_label(self, widget, label):
 329         if (widget.get_label() == label):
 330             self.channel_edit_input_menu.remove(widget)
 331
 332     def on_remove_input_channel(self, widget, channel):
 333         print('Removing channel "%s"' % channel.channel_name)
 334         self.channel_remove_input_menu.remove(widget)
 335         self.channel_edit_input_menu.foreach(
 336             self.remove_channel_edit_input_menuitem_by_label,
 337             channel.channel_name);
 338         if self.monitored_channel is channel:
 339             channel.monitor_button.set_active(False)
 340         for i in range(len(self.channels)):
 341             if self.channels[i] is channel:
 342                 channel.unrealize()
 343                 del self.channels[i]
 344                 self.hbox_inputs.remove(channel.get_parent())
 345                 break
 346         if len(self.channels) == 0:
 347             self.channel_remove_input_menu_item.set_sensitive(False)
 348
 349     def on_edit_output_channel(self, widget, channel):
 350         print('Editing channel "%s"' % channel.channel_name)
 351         channel.on_channel_properties()
 352
 353     def remove_channel_edit_output_menuitem_by_label(self, widget, label):
 354         if (widget.get_label() == label):
 355             self.channel_edit_output_menu.remove(widget)
 356
 357     def on_remove_output_channel(self, widget, channel):
 358         print('Removing channel "%s"' % channel.channel_name)
 359         self.channel_remove_output_menu.remove(widget)
 360         self.channel_edit_output_menu.foreach(
 361             self.remove_channel_edit_output_menuitem_by_label,
 362             channel.channel_name);
 363         if self.monitored_channel is channel:
 364             channel.monitor_button.set_active(False)
 365         for i in range(len(self.channels)):
 366             if self.output_channels[i] is channel:
 367                 channel.unrealize()
 368                 del self.output_channels[i]
 369                 self.hbox_outputs.remove(channel.get_parent())
 370                 break
 371         if len(self.output_channels) == 0:
 372             self.channel_remove_output_menu_item.set_sensitive(False)
 373
 374     def rename_channels(self, container, parameters):
 375         if (container.get_label() == parameters['oldname']):
 376             container.set_label(parameters['newname'])
 377
 378     def on_channel_rename(self, oldname, newname):
 379         rename_parameters = { 'oldname' : oldname, 'newname' : newname }
 380         self.channel_edit_input_menu.foreach(self.rename_channels,
 381             rename_parameters)
 382         self.channel_edit_output_menu.foreach(self.rename_channels,
 383             rename_parameters)
 384         self.channel_remove_input_menu.foreach(self.rename_channels,
 385             rename_parameters)
 386         self.channel_remove_output_menu.foreach(self.rename_channels,
 387             rename_parameters)
 388         print("Renaming channel from %s to %s\n" % (oldname, newname))
 389
 390
 391     def on_channels_clear(self, widget):
 392         for channel in self.output_channels:
 393             channel.unrealize()
 394             self.hbox_outputs.remove(channel.get_parent())
 395         for channel in self.channels:
 396             channel.unrealize()
 397             self.hbox_inputs.remove(channel.get_parent())
 398         self.channels = []
 399         self.output_channels = []
 400         self.channel_edit_input_menu = Gtk.Menu()
 401         self.channel_edit_input_menu_item.set_submenu(self.channel_edit_input_menu)
 402         self.channel_edit_input_menu_item.set_sensitive(False)
 403         self.channel_remove_input_menu = Gtk.Menu()
 404         self.channel_remove_input_menu_item.set_submenu(self.channel_remove_input_menu)
 405         self.channel_remove_input_menu_item.set_sensitive(False)
 406         self.channel_edit_output_menu = Gtk.Menu()
 407         self.channel_edit_output_menu_item.set_submenu(self.channel_edit_output_menu)
 408         self.channel_edit_output_menu_item.set_sensitive(False)
 409         self.channel_remove_output_menu = Gtk.Menu()
 410         self.channel_remove_output_menu_item.set_submenu(self.channel_remove_output_menu)
 411         self.channel_remove_output_menu_item.set_sensitive(False)
 412
 413     def add_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, solo_cc):
 414         try:
 415             channel = InputChannel(self, name, stereo)
 416             self.add_channel_precreated(channel)
 417         except Exception:
 418             e = sys.exc_info()[0]
 419             err = Gtk.MessageDialog(self.window,
 420                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 421                             Gtk.MessageType.ERROR,
 422                             Gtk.ButtonsType.OK,
 423                             "Channel creation failed")
 424             err.run()
 425             err.destroy()
 426             return
 427         if volume_cc != '-1':
 428             channel.channel.volume_midi_cc = int(volume_cc)
 429         if balance_cc != '-1':
 430             channel.channel.balance_midi_cc = int(balance_cc)
 431         if mute_cc != '-1':
 432             channel.channel.mute_midi_cc = int(mute_cc)
 433         if solo_cc != '-1':
 434             channel.channel.solo_midi_cc = int(solo_cc)
 435         if (volume_cc == '-1' and balance_cc == '-1' and mute_cc == '-1' and solo_cc == '-1'):
 436             channel.channel.autoset_midi_cc()
 437
 438         return channel
 439
 440     def add_channel_precreated(self, channel):
 441         frame = Gtk.Frame()
 442         frame.add(channel)
 443         self.hbox_inputs.pack_start(frame, False, True, 0)
 444         channel.realize()
 445
 446         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 447         self.channel_edit_input_menu.append(channel_edit_menu_item)
 448         channel_edit_menu_item.connect("activate", self.on_edit_input_channel, channel)
 449         self.channel_edit_input_menu_item.set_sensitive(True)
 450
 451         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 452         self.channel_remove_input_menu.append(channel_remove_menu_item)
 453         channel_remove_menu_item.connect("activate", self.on_remove_input_channel, channel)
 454         self.channel_remove_input_menu_item.set_sensitive(True)
 455
 456         self.channels.append(channel)
 457
 458         for outputchannel in self.output_channels:
 459             channel.add_control_group(outputchannel)
 460
 461         # create post fader output channel matching the input channel
 462         channel.post_fader_output_channel = self.mixer.add_output_channel(
 463                         channel.channel.name + ' Out', channel.channel.is_stereo, True)
 464         channel.post_fader_output_channel.volume = 0
 465         channel.post_fader_output_channel.set_solo(channel.channel, True)
 466
 467     def read_meters(self):
 468         for channel in self.channels:
 469             channel.read_meter()
 470         for channel in self.output_channels:
 471             channel.read_meter()
 472         return True
 473
 474     def midi_events_check(self):
 475         for channel in self.channels + self.output_channels:
 476             channel.midi_events_check()
 477         return True
 478
 479     def add_output_channel(self, name, stereo, volume_cc, balance_cc, mute_cc, display_solo_buttons):
 480         try:
 481             channel = OutputChannel(self, name, stereo)
 482             channel.display_solo_buttons = display_solo_buttons
 483             self.add_output_channel_precreated(channel)
 484         except Exception:
 485             err = Gtk.MessageDialog(self.window,
 486                             Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
 487                             Gtk.MessageType.ERROR,
 488                             Gtk.ButtonsType.OK,
 489                             "Channel creation failed")
 490             err.run()
 491             err.destroy()
 492             return
 493         if volume_cc != '-1':
 494             channel.channel.volume_midi_cc = int(volume_cc)
 495         if balance_cc != '-1':
 496             channel.channel.balance_midi_cc = int(balance_cc)
 497         if mute_cc != '-1':
 498             channel.channel.mute_midi_cc = int(mute_cc)
 499         return channel
 500
 501     def add_output_channel_precreated(self, channel):
 502         frame = Gtk.Frame()
 503         frame.add(channel)
 504         self.hbox_outputs.pack_start(frame, False, True, 0)
 505         channel.realize()
 506
 507         channel_edit_menu_item = Gtk.MenuItem(label=channel.channel_name)
 508         self.channel_edit_output_menu.append(channel_edit_menu_item)
 509         channel_edit_menu_item.connect("activate", self.on_edit_output_channel, channel)
 510         self.channel_edit_output_menu_item.set_sensitive(True)
 511
 512         channel_remove_menu_item = Gtk.MenuItem(label=channel.channel_name)
 513         self.channel_remove_output_menu.append(channel_remove_menu_item)
 514         channel_remove_menu_item.connect("activate", self.on_remove_output_channel, channel)
 515         self.channel_remove_output_menu_item.set_sensitive(True)
 516
 517         self.output_channels.append(channel)
 518
 519     _monitored_channel = None
 520     def get_monitored_channel(self):
 521         return self._monitored_channel
 522
 523     def set_monitored_channel(self, channel):
 524         if self._monitored_channel:
 525             if channel.channel.name == self._monitored_channel.channel.name:
 526                 return
 527         self._monitored_channel = channel
 528         if type(channel) is InputChannel:
 529             # reset all solo/mute settings
 530             for in_channel in self.channels:
 531                 self.monitor_channel.set_solo(in_channel.channel, False)
 532                 self.monitor_channel.set_muted(in_channel.channel, False)
 533             self.monitor_channel.set_solo(channel.channel, True)
 534             self.monitor_channel.prefader = True
 535         else:
 536             self.monitor_channel.prefader = False
 537         self.update_monitor(channel)
 538     monitored_channel = property(get_monitored_channel, set_monitored_channel)
 539
 540     def update_monitor(self, channel):
 541         if self.monitored_channel is not channel:
 542             return
 543         self.monitor_channel.volume = channel.channel.volume
 544         self.monitor_channel.balance = channel.channel.balance
 545         self.monitor_channel.out_mute = channel.channel.out_mute
 546         if type(self.monitored_channel) is OutputChannel:
 547             # sync solo/muted channels
 548             for input_channel in self.channels:
 549                 self.monitor_channel.set_solo(input_channel.channel,
 550                                 channel.channel.is_solo(input_channel.channel))
 551                 self.monitor_channel.set_muted(input_channel.channel,
 552                                 channel.channel.is_muted(input_channel.channel))
 553
 554     def get_input_channel_by_name(self, name):
 555         for input_channel in self.channels:
 556             if input_channel.channel.name == name:
 557                 return input_channel
 558         return None
 559
 560     def on_about(self, *args):
 561         about = Gtk.AboutDialog()
 562         about.set_name('jack_mixer')
 563         about.set_copyright('Copyright © 2006-2020\nNedko Arnaudov, Frederic Peters, Arnout Engelen, Daniel Sheeler')
 564         about.set_license('''\
 565 jack_mixer is free software; you can redistribute it and/or modify it
 566 under the terms of the GNU General Public License as published by the
 567 Free Software Foundation; either version 2 of the License, or (at your
 568 option) any later version.
 569
 570 jack_mixer is distributed in the hope that it will be useful, but
 571 WITHOUT ANY WARRANTY; without even the implied warranty of
 572 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 573 General Public License for more details.
 574
 575 You should have received a copy of the GNU General Public License along
 576 with jack_mixer; if not, write to the Free Software Foundation, Inc., 51
 577 Franklin Street, Fifth Floor, Boston, MA 02110-130159 USA''')
 578         about.set_authors(['Nedko Arnaudov <nedko@arnaudov.name>',
 579                            'Frederic Peters <fpeters@0d.be>'])
 580         about.set_logo_icon_name('jack_mixer')
 581         about.set_website('http://home.gna.org/jackmixer/')
 582
 583         about.run()
 584         about.destroy()
 585
 586     def lash_check_events(self):
 587         if self.save:
 588             self.save = False
 589             if self.current_filename:
 590                 print("saving on SIGUSR1 request")
 591                 self.on_save_cb()
 592                 print("save done")
 593             else:
 594                 print("not saving because filename is not known")
 595             return True
 596
 597         if not self.lash_client:
 598             return True
 599
 600         while lash.lash_get_pending_event_count(self.lash_client):
 601             event = lash.lash_get_event(self.lash_client)
 602
 603             #print repr(event)
 604
 605             event_type = lash.lash_event_get_type(event)
 606             if event_type == lash.LASH_Quit:
 607                 print("jack_mixer: LASH ordered quit.")
 608                 Gtk.main_quit()
 609                 return False
 610             elif event_type == lash.LASH_Save_File:
 611                 directory = lash.lash_event_get_string(event)
 612                 print("jack_mixer: LASH ordered to save data in directory %s" % directory)
 613                 filename = directory + os.sep + "jack_mixer.xml"
 614                 f = file(filename, "w")
 615                 self.save_to_xml(f)
 616                 f.close()
 617                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 618             elif event_type == lash.LASH_Restore_File:
 619                 directory = lash.lash_event_get_string(event)
 620                 print("jack_mixer: LASH ordered to restore data from directory %s" % directory)
 621                 filename = directory + os.sep + "jack_mixer.xml"
 622                 f = file(filename, "r")
 623                 self.load_from_xml(f, silence_errors=True)
 624                 f.close()
 625                 lash.lash_send_event(self.lash_client, event)
 626             else:
 627                 print("jack_mixer: Got unhandled LASH event, type " + str(event_type))
 628                 return True
 629
 630             #lash.lash_event_destroy(event)
 631
 632         return True
 633
 634     def save_to_xml(self, file):
 635         #print "Saving to XML..."
 636         b = XmlSerialization()
 637         s = Serializator()
 638         s.serialize(self, b)
 639         b.save(file)
 640
 641     def load_from_xml(self, file, silence_errors=False):
 642         #print "Loading from XML..."
 643         self.on_channels_clear(None)
 644         self.unserialized_channels = []
 645         b = XmlSerialization()
 646         try:
 647             b.load(file)
 648         except:
 649             if silence_errors:
 650                 return
 651             raise
 652         s = Serializator()
 653         s.unserialize(self, b)
 654         for channel in self.unserialized_channels:
 655             if isinstance(channel, InputChannel):
 656                 if self._init_solo_channels and channel.channel_name in self._init_solo_channels:
 657                     channel.solo = True
 658                 self.add_channel_precreated(channel)
 659         self._init_solo_channels = None
 660         for channel in self.unserialized_channels:
 661             if isinstance(channel, OutputChannel):
 662                 self.add_output_channel_precreated(channel)
 663         del self.unserialized_channels
 664         self.window.show_all()
 665
 666     def serialize(self, object_backend):
 667         width, height = self.window.get_size()
 668         object_backend.add_property('geometry',
 669                         '%sx%s' % (width, height))
 670         solo_channels = []
 671         for input_channel in self.channels:
 672             if input_channel.channel.solo:
 673                 solo_channels.append(input_channel)
 674         if solo_channels:
 675             object_backend.add_property('solo_channels', '|'.join([x.channel.name for x in solo_channels]))
 676
 677     def unserialize_property(self, name, value):
 678         if name == 'geometry':
 679             width, height = value.split('x')
 680             self.window.resize(int(width), int(height))
 681             return True
 682         if name == 'solo_channels':
 683             self._init_solo_channels = value.split('|')
 684             return True
 685
 686     def unserialize_child(self, name):
 687         if name == InputChannel.serialization_name():
 688             channel = InputChannel(self, "", True)
 689             self.unserialized_channels.append(channel)
 690             return channel
 691
 692         if name == OutputChannel.serialization_name():
 693             channel = OutputChannel(self, "", True)
 694             self.unserialized_channels.append(channel)
 695             return channel
 696
 697     def serialization_get_childs(self):
 698         '''Get child objects tha required and support serialization'''
 699         childs = self.channels[:] + self.output_channels[:]
 700         return childs
 701
 702     def serialization_name(self):
 703         return "jack_mixer"
 704
 705     def main(self):
 706         if not self.mixer:
 707             return
 708
 709         self.window.show_all()
 710
 711         signal.signal(signal.SIGUSR1, self.sighandler)
 712         signal.signal(signal.SIGTERM, self.sighandler)
 713         signal.signal(signal.SIGINT, self.sighandler)
 714         signal.signal(signal.SIGHUP, signal.SIG_IGN)
 715
 716         Gtk.main()
 717
 718         #f = file("/dev/stdout", "w")
 719         #self.save_to_xml(f)
 720         #f.close
 721
 722 def help():
 723     print("Usage: %s [mixer_name]" % sys.argv[0])
 724
 725 def main():
 726     # Connect to LASH if Python bindings are available, and the user did not
 727     # pass --no-lash
 728     if lash and not '--no-lash' in sys.argv:
 729         # sys.argv is modified by this call
 730         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 731     else:
 732         lash_client = None
 733
 734     parser = OptionParser(usage='usage: %prog [options] [jack_client_name]')
 735     parser.add_option('-c', '--config', dest='config',
 736                       help='use a non default configuration file')
 737     # --no-lash here is not acted upon, it is specified for completeness when
 738     # --help is passed.
 739     parser.add_option('--no-lash', dest='nolash', action='store_true',
 740                       help='do not connect to LASH')
 741     options, args = parser.parse_args()
 742
 743     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 744     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 745     if lash_client:
 746         server_name = lash.lash_get_server_name(lash_client)
 747         if server_name:
 748             print("Successfully connected to LASH server at " + server_name)
 749         else:
 750             # getting the server name failed, probably not worth trying to do
 751             # further things with as a lash client.
 752             lash_client = None
 753
 754     if len(args) == 1:
 755         name = args[0]
 756     else:
 757         name = None
 758
 759     if not name:
 760         name = "jack_mixer"
 761
 762     try:
 763         mixer = JackMixer(name, lash_client)
 764     except Exception as e:
 765         err = Gtk.MessageDialog(None,
 766                             Gtk.DialogFlags.MODAL,
 767                             Gtk.MessageType.ERROR,
 768                             Gtk.ButtonsType.OK,
 769                             "Mixer creation failed (%s)" % str(e))
 770         err.run()
 771         err.destroy()
 772         sys.exit(1)
 773
 774     if options.config:
 775         f = open(options.config)
 776         mixer.current_filename = options.config
 777         try:
 778             mixer.load_from_xml(f)
 779         except:
 780             err = Gtk.MessageDialog(mixer.window,
 781                             Gtk.DialogFlags.MODAL,
 782                             Gtk.MessageType.ERROR,
 783                             Gtk.ButtonsType.OK,
 784                             "Failed loading settings.")
 785             err.run()
 786             err.destroy()
 787         mixer.window.set_default_size(60*(1+len(mixer.channels)+len(mixer.output_channels)), 300)
 788         f.close()
 789
 790     mixer.main()
 791
 792     mixer.cleanup()
 793
 794 if __name__ == "__main__":
 795     main()