jack_mixer.py

   1 #!/usr/bin/env python
   2 #
   3 # This file is part of jack_mixer
   4 #
   5 # Copyright (C) 2006 Nedko Arnaudov <nedko@arnaudov.name>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; version 2 of the License
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20 import gtk
  21 import gobject
  22 import jack_mixer_c
  23 import sys
  24 from channel import *
  25 import gtk.glade
  26 import os
  27 import gui
  28
  29 try:
  30     import lash
  31 except:
  32     print "Cannot load LASH python bindings, you want LASH unless you enjoy manual jack plumbing each time you use this app"
  33     lash = None
  34
  35 # no need for serialization if there is no LASH available
  36 if lash:
  37     from serialization_xml import xml_serialization
  38     from serialization import serialized_object, serializator
  39
  40 class jack_mixer(serialized_object):
  41     def __init__(self, name, lash_client):
  42         self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
  43         self.window.set_title(name)
  44
  45         self.gui_factory = gui.factory(glade_xml, self.window, meter_scales, slider_scales)
  46
  47         self.vbox_top = gtk.VBox()
  48         self.window.add(self.vbox_top)
  49
  50         self.menubar = gtk.MenuBar()
  51         self.vbox_top.pack_start(self.menubar, False)
  52
  53         self.channels_menu_item = gtk.MenuItem("_Channel")
  54         self.menubar.append(self.channels_menu_item)
  55
  56         self.settings_menu_item = gtk.MenuItem("_Settings")
  57         self.menubar.append(self.settings_menu_item)
  58
  59         self.window.set_size_request(120,300)
  60
  61         self.channels_menu = gtk.Menu()
  62         self.channels_menu_item.set_submenu(self.channels_menu)
  63
  64         self.channel_add_menu_item = gtk.ImageMenuItem(gtk.STOCK_ADD)
  65         self.channels_menu.append(self.channel_add_menu_item)
  66         self.channel_add_menu_item.connect("activate", self.on_add_channel)
  67
  68         self.channel_remove_menu_item = gtk.ImageMenuItem(gtk.STOCK_REMOVE)
  69         self.channels_menu.append(self.channel_remove_menu_item)
  70
  71         self.channel_remove_menu = gtk.Menu()
  72         self.channel_remove_menu_item.set_submenu(self.channel_remove_menu)
  73
  74         self.channel_remove_all_menu_item = gtk.ImageMenuItem(gtk.STOCK_CLEAR)
  75         self.channels_menu.append(self.channel_remove_all_menu_item)
  76         self.channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
  77
  78         self.settings_menu = gtk.Menu()
  79         self.settings_menu_item.set_submenu(self.settings_menu)
  80
  81         self.settings_choose_meter_scale_menu_item = gtk.MenuItem("_Meter scale")
  82         self.settings_choose_meter_scale_menu_item.connect("activate", self.on_choose_meter_scale)
  83         self.settings_menu.append(self.settings_choose_meter_scale_menu_item)
  84
  85         self.settings_choose_slider_scale_menu_item = gtk.MenuItem("_Slider scale")
  86         self.settings_choose_slider_scale_menu_item.connect("activate", self.on_choose_slider_scale)
  87         self.settings_menu.append(self.settings_choose_slider_scale_menu_item)
  88
  89         self.hbox_top = gtk.HBox()
  90         self.vbox_top.pack_start(self.hbox_top, True)
  91
  92         self.scrolled_window = gtk.ScrolledWindow()
  93         self.hbox_top.pack_start(self.scrolled_window, True)
  94
  95         self.hbox_inputs = gtk.HBox()
  96         self.hbox_inputs.set_spacing(0)
  97         self.hbox_inputs.set_border_width(0)
  98         self.hbox_top.set_spacing(0)
  99         self.hbox_top.set_border_width(0)
 100         self.channels = []
 101
 102         self.scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
 103         self.scrolled_window.add_with_viewport(self.hbox_inputs)
 104
 105         self.main_mix = main_mix(self.gui_factory)
 106         self.main_mix.realize()
 107         frame = gtk.Frame()
 108         frame.add(self.main_mix)
 109         self.hbox_top.pack_start(frame, False)
 110
 111         self.window.connect("destroy", gtk.main_quit)
 112
 113         gobject.timeout_add(80, self.read_meters)
 114         self.lash_client = lash_client
 115
 116         if lash_client:
 117             gobject.timeout_add(1000, self.lash_check_events)
 118
 119     def cleanup(self):
 120         print "Cleaning jack_mixer"
 121         for channel in self.channels:
 122             channel.unrealize()
 123
 124     def on_choose_meter_scale(self, widget):
 125         self.gui_factory.run_dialog_choose_meter_scale()
 126
 127     def on_choose_slider_scale(self, widget):
 128         self.gui_factory.run_dialog_choose_slider_scale()
 129
 130     def on_add_channel(self, widget):
 131         result = self.gui_factory.run_dialog_add_channel()
 132         if result:
 133             self.add_channel(result['name'], result['stereo'])
 134             self.window.show_all()
 135
 136     def on_remove_channel(self, widget, channel, channel_remove_menu_item):
 137         print 'Removing channel "%s"' % channel.channel_name
 138         self.channel_remove_menu.remove(channel_remove_menu_item)
 139         for i in range(len(self.channels)):
 140             if self.channels[i] is channel:
 141                 channel.unrealize()
 142                 del self.channels[i]
 143                 self.hbox_inputs.remove(channel.parent)
 144                 break
 145         if len(self.channels) == 0:
 146             self.channel_remove_menu_item.set_sensitive(False)
 147
 148     def on_channels_clear(self, widget):
 149         for channel in self.channels:
 150             channel.unrealize()
 151             self.hbox_inputs.remove(channel.parent)
 152         self.channels = []
 153         self.channel_remove_menu = gtk.Menu()
 154         self.channel_remove_menu_item.set_submenu(self.channel_remove_menu)
 155         self.channel_remove_menu_item.set_sensitive(False)
 156
 157     def add_channel(self, name, stereo):
 158         channel = input_channel(self.gui_factory, name, stereo)
 159         self.add_channel_precreated(channel)
 160
 161     def add_channel_precreated(self, channel):
 162         self.channels.append(channel)
 163         frame = gtk.Frame()
 164         frame.add(channel)
 165         self.hbox_inputs.pack_start(frame, False)
 166         channel.realize()
 167         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 168         self.channel_remove_menu.append(channel_remove_menu_item)
 169         channel_remove_menu_item.connect("activate", self.on_remove_channel, channel, channel_remove_menu_item)
 170         self.channel_remove_menu_item.set_sensitive(True)
 171
 172     def read_meters(self):
 173         for channel in self.channels:
 174             channel.read_meter()
 175         self.main_mix.read_meter()
 176         return True
 177
 178     def lash_check_events(self):
 179         while lash.lash_get_pending_event_count(self.lash_client):
 180             event = lash.lash_get_event(self.lash_client)
 181
 182             #print repr(event)
 183
 184             event_type = lash.lash_event_get_type(event)
 185             if event_type == lash.LASH_Quit:
 186                 print "jack_mixer: LASH ordered quit."
 187                 gtk.main_quit()
 188                 return False
 189             elif event_type == lash.LASH_Save_File:
 190                 directory = lash.lash_event_get_string(event)
 191                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 192                 filename = directory + os.sep + "jack_mixer.xml"
 193                 f = file(filename, "w")
 194                 self.save_to_xml(f)
 195                 f.close()
 196                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 197             elif event_type == lash.LASH_Restore_File:
 198                 directory = lash.lash_event_get_string(event)
 199                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 200                 filename = directory + os.sep + "jack_mixer.xml"
 201                 f = file(filename, "r")
 202                 self.load_from_xml(f)
 203                 f.close()
 204             else:
 205                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 206                 return True
 207
 208             #lash.lash_event_destroy(event)
 209
 210         return True
 211
 212     def save_to_xml(self, file):
 213         #print "Saving to XML..."
 214         b = xml_serialization()
 215         s = serializator()
 216         s.serialize(self, b)
 217         b.save(file)
 218
 219     def load_from_xml(self, file):
 220         #print "Loading from XML..."
 221         self.on_channels_clear(None)
 222         self.unserialized_channels = []
 223         b = xml_serialization()
 224         b.load(file)
 225         s = serializator()
 226         s.unserialize(self, b)
 227         for channel in self.unserialized_channels:
 228             self.add_channel_precreated(channel)
 229         del self.unserialized_channels
 230         self.window.show_all()
 231
 232     def serialize(self, object_backend):
 233         pass
 234
 235     def unserialize_property(self, name, value):
 236         pass
 237
 238     def unserialize_child(self, name):
 239         if name == main_mix_serialization_name():
 240             return self.main_mix
 241
 242         if name == input_channel_serialization_name():
 243             channel = input_channel(self.gui_factory, "", True)
 244             self.unserialized_channels.append(channel)
 245             return channel
 246
 247     def serialization_get_childs(self):
 248         '''Get child objects tha required and support serialization'''
 249         childs = self.channels[:]
 250         childs.append(self.main_mix)
 251         return childs
 252
 253     def serialization_name(self):
 254         return "jack_mixer"
 255
 256     def main(self):
 257         self.window.show_all()
 258
 259         gtk.main()
 260
 261         #f = file("/dev/stdout", "w")
 262         #self.save_to_xml(f)
 263         #f.close
 264
 265 def help():
 266     print "Usage: %s [mixer_name]" % sys.argv[0]
 267
 268 def main():
 269     if lash:                        # If LASH python bindings are available
 270         # sys.argv is modified by this call
 271         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 272     else:
 273         lash_client = None
 274
 275     # check arguments
 276     args = sys.argv[1:]
 277     i = len(args)
 278     for arg in reversed(args):
 279         i -= 1
 280         if len(arg) != 0 and arg[0] == '-':
 281             if arg == "--help":
 282                 help()
 283                 return
 284             else:
 285                 print 'Unknown option "%s"' % args[i]
 286                 help()
 287                 return
 288             del args[i]
 289     #    else:
 290     #        print 'Non option argument "%s"' % args[i]
 291
 292     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 293     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 294     if lash_client:
 295         print "Successfully connected to LASH server at " +  lash.lash_get_server_name(lash_client)
 296
 297     if len(args) == 1:
 298         name = args[0]
 299     else:
 300         name = None
 301
 302     if not name:
 303         name = "jack_mixer-%u" % os.getpid()
 304
 305     if not jack_mixer_c.init(name):
 306         return
 307
 308     if lash_client:
 309         # Send our client name to server
 310         lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
 311         lash.lash_event_set_string(lash_event, name)
 312         lash.lash_send_event(lash_client, lash_event)
 313
 314         lash.lash_jack_client_name(lash_client, name)
 315
 316     mixer = jack_mixer(name, lash_client)
 317
 318     mixer.main()
 319
 320     mixer.cleanup()
 321
 322     jack_mixer_c.uninit()
 323
 324 glade_dir = os.path.dirname(sys.argv[0])
 325
 326 # since ppl tend to run "python jack_mixer.py", lets assume that it is in current directory
 327 # "python ./jack_mixer.py" and "./jack_mixer.py" will work anyway.
 328 if not glade_dir:
 329     glade_dir = "."
 330
 331 glade_file = glade_dir + os.sep + "jack_mixer.glade"
 332
 333 if not os.path.isfile(glade_file):
 334     glade_file = glade_dir + os.sep + ".." + os.sep + "share"+ os.sep + "jack_mixer" + os.sep + "jack_mixer.glade"
 335
 336 #print 'Loading glade from "%s"' % glade_file
 337
 338 glade_xml = gtk.glade.XML(glade_file)
 339
 340 # scales suitable as meter scales
 341 meter_scales = [scale.iec_268(), scale.linear_70dB(), scale.iec_268_minimalistic()]
 342
 343 # scales suitable as volume slider scales
 344 slider_scales = [scale.linear_30dB(), scale.linear_70dB()]
 345
 346 if __name__ == "__main__":
 347     main()