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 import gtk.glade
  25 import os
  26
  27 try:
  28     import lash
  29 except:
  30     print "Cannot load LASH python bindings, you want LASH unless you enjoy manual jack plumbing each time you use this app"
  31     lash = None
  32
  33 old_path = sys.path
  34 sys.path.insert(0, os.path.dirname(sys.argv[0]) + os.sep + ".." + os.sep + "share"+ os.sep + "jack_mixer")
  35 from channel import *
  36 import gui
  37 sys.path = old_path
  38
  39
  40 # no need for serialization if there is no LASH available
  41 if lash:
  42     from serialization_xml import xml_serialization
  43     from serialization import serialized_object, serializator
  44
  45 class jack_mixer(serialized_object):
  46     def __init__(self, name, lash_client):
  47         self.mixer = jack_mixer_c.create(name)
  48         if not self.mixer:
  49             return
  50
  51         if lash_client:
  52             # Send our client name to server
  53             lash_event = lash.lash_event_new_with_type(lash.LASH_Client_Name)
  54             lash.lash_event_set_string(lash_event, name)
  55             lash.lash_send_event(lash_client, lash_event)
  56
  57         lash.lash_jack_client_name(lash_client, name)
  58
  59         self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
  60         self.window.set_title(name)
  61
  62         self.gui_factory = gui.factory(glade_xml, self.window, meter_scales, slider_scales)
  63
  64         self.vbox_top = gtk.VBox()
  65         self.window.add(self.vbox_top)
  66
  67         self.menubar = gtk.MenuBar()
  68         self.vbox_top.pack_start(self.menubar, False)
  69
  70         self.channels_menu_item = gtk.MenuItem("_Channel")
  71         self.menubar.append(self.channels_menu_item)
  72
  73         self.settings_menu_item = gtk.MenuItem("_Settings")
  74         self.menubar.append(self.settings_menu_item)
  75
  76         self.window.set_size_request(120,300)
  77
  78         self.channels_menu = gtk.Menu()
  79         self.channels_menu_item.set_submenu(self.channels_menu)
  80
  81         self.channel_add_menu_item = gtk.ImageMenuItem(gtk.STOCK_ADD)
  82         self.channels_menu.append(self.channel_add_menu_item)
  83         self.channel_add_menu_item.connect("activate", self.on_add_channel)
  84
  85         self.channel_remove_menu_item = gtk.ImageMenuItem(gtk.STOCK_REMOVE)
  86         self.channels_menu.append(self.channel_remove_menu_item)
  87
  88         self.channel_remove_menu = gtk.Menu()
  89         self.channel_remove_menu_item.set_submenu(self.channel_remove_menu)
  90
  91         self.channel_remove_all_menu_item = gtk.ImageMenuItem(gtk.STOCK_CLEAR)
  92         self.channels_menu.append(self.channel_remove_all_menu_item)
  93         self.channel_remove_all_menu_item.connect("activate", self.on_channels_clear)
  94
  95         self.settings_menu = gtk.Menu()
  96         self.settings_menu_item.set_submenu(self.settings_menu)
  97
  98         self.settings_choose_meter_scale_menu_item = gtk.MenuItem("_Meter scale")
  99         self.settings_choose_meter_scale_menu_item.connect("activate", self.on_choose_meter_scale)
 100         self.settings_menu.append(self.settings_choose_meter_scale_menu_item)
 101
 102         self.settings_choose_slider_scale_menu_item = gtk.MenuItem("_Slider scale")
 103         self.settings_choose_slider_scale_menu_item.connect("activate", self.on_choose_slider_scale)
 104         self.settings_menu.append(self.settings_choose_slider_scale_menu_item)
 105
 106         self.hbox_top = gtk.HBox()
 107         self.vbox_top.pack_start(self.hbox_top, True)
 108
 109         self.scrolled_window = gtk.ScrolledWindow()
 110         self.hbox_top.pack_start(self.scrolled_window, True)
 111
 112         self.hbox_inputs = gtk.HBox()
 113         self.hbox_inputs.set_spacing(0)
 114         self.hbox_inputs.set_border_width(0)
 115         self.hbox_top.set_spacing(0)
 116         self.hbox_top.set_border_width(0)
 117         self.channels = []
 118
 119         self.scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
 120         self.scrolled_window.add_with_viewport(self.hbox_inputs)
 121
 122         self.main_mix = main_mix(self.mixer, self.gui_factory)
 123         self.main_mix.realize()
 124         frame = gtk.Frame()
 125         frame.add(self.main_mix)
 126         self.hbox_top.pack_start(frame, False)
 127
 128         self.window.connect("destroy", gtk.main_quit)
 129
 130         gobject.timeout_add(80, self.read_meters)
 131         self.lash_client = lash_client
 132
 133         if lash_client:
 134             gobject.timeout_add(1000, self.lash_check_events)
 135
 136         gobject.timeout_add(100, self.midi_change_check)
 137
 138     def cleanup(self):
 139         print "Cleaning jack_mixer"
 140         if not self.mixer:
 141             return
 142
 143         for channel in self.channels:
 144             channel.unrealize()
 145
 146         jack_mixer_c.destroy(self.mixer)
 147
 148     def on_choose_meter_scale(self, widget):
 149         self.gui_factory.run_dialog_choose_meter_scale()
 150
 151     def on_choose_slider_scale(self, widget):
 152         self.gui_factory.run_dialog_choose_slider_scale()
 153
 154     def on_add_channel(self, widget):
 155         result = self.gui_factory.run_dialog_add_channel()
 156         if result:
 157             self.add_channel(result['name'], result['stereo'])
 158             self.window.show_all()
 159
 160     def on_remove_channel(self, widget, channel, channel_remove_menu_item):
 161         print 'Removing channel "%s"' % channel.channel_name
 162         self.channel_remove_menu.remove(channel_remove_menu_item)
 163         for i in range(len(self.channels)):
 164             if self.channels[i] is channel:
 165                 channel.unrealize()
 166                 del self.channels[i]
 167                 self.hbox_inputs.remove(channel.parent)
 168                 break
 169         if len(self.channels) == 0:
 170             self.channel_remove_menu_item.set_sensitive(False)
 171
 172     def on_channels_clear(self, widget):
 173         for channel in self.channels:
 174             channel.unrealize()
 175             self.hbox_inputs.remove(channel.parent)
 176         self.channels = []
 177         self.channel_remove_menu = gtk.Menu()
 178         self.channel_remove_menu_item.set_submenu(self.channel_remove_menu)
 179         self.channel_remove_menu_item.set_sensitive(False)
 180
 181     def add_channel(self, name, stereo):
 182         channel = input_channel(self.mixer, self.gui_factory, name, stereo)
 183         self.add_channel_precreated(channel)
 184
 185     def add_channel_precreated(self, channel):
 186         self.channels.append(channel)
 187         frame = gtk.Frame()
 188         frame.add(channel)
 189         self.hbox_inputs.pack_start(frame, False)
 190         channel.realize()
 191         channel_remove_menu_item = gtk.MenuItem(channel.channel_name)
 192         self.channel_remove_menu.append(channel_remove_menu_item)
 193         channel_remove_menu_item.connect("activate", self.on_remove_channel, channel, channel_remove_menu_item)
 194         self.channel_remove_menu_item.set_sensitive(True)
 195
 196     def read_meters(self):
 197         for channel in self.channels:
 198             channel.read_meter()
 199         self.main_mix.read_meter()
 200         return True
 201
 202     def midi_change_check(self):
 203         for channel in self.channels:
 204             channel.midi_change_check()
 205         self.main_mix.midi_change_check()
 206         return True
 207
 208     def lash_check_events(self):
 209         while lash.lash_get_pending_event_count(self.lash_client):
 210             event = lash.lash_get_event(self.lash_client)
 211
 212             #print repr(event)
 213
 214             event_type = lash.lash_event_get_type(event)
 215             if event_type == lash.LASH_Quit:
 216                 print "jack_mixer: LASH ordered quit."
 217                 gtk.main_quit()
 218                 return False
 219             elif event_type == lash.LASH_Save_File:
 220                 directory = lash.lash_event_get_string(event)
 221                 print "jack_mixer: LASH ordered to save data in directory %s" % directory
 222                 filename = directory + os.sep + "jack_mixer.xml"
 223                 f = file(filename, "w")
 224                 self.save_to_xml(f)
 225                 f.close()
 226                 lash.lash_send_event(self.lash_client, event) # we crash with double free
 227             elif event_type == lash.LASH_Restore_File:
 228                 directory = lash.lash_event_get_string(event)
 229                 print "jack_mixer: LASH ordered to restore data from directory %s" % directory
 230                 filename = directory + os.sep + "jack_mixer.xml"
 231                 f = file(filename, "r")
 232                 self.load_from_xml(f)
 233                 f.close()
 234             else:
 235                 print "jack_mixer: Got unhandled LASH event, type " + str(event_type)
 236                 return True
 237
 238             #lash.lash_event_destroy(event)
 239
 240         return True
 241
 242     def save_to_xml(self, file):
 243         #print "Saving to XML..."
 244         b = xml_serialization()
 245         s = serializator()
 246         s.serialize(self, b)
 247         b.save(file)
 248
 249     def load_from_xml(self, file):
 250         #print "Loading from XML..."
 251         self.on_channels_clear(None)
 252         self.unserialized_channels = []
 253         b = xml_serialization()
 254         b.load(file)
 255         s = serializator()
 256         s.unserialize(self, b)
 257         for channel in self.unserialized_channels:
 258             self.add_channel_precreated(channel)
 259         del self.unserialized_channels
 260         self.window.show_all()
 261
 262     def serialize(self, object_backend):
 263         pass
 264
 265     def unserialize_property(self, name, value):
 266         pass
 267
 268     def unserialize_child(self, name):
 269         if name == main_mix_serialization_name():
 270             return self.main_mix
 271
 272         if name == input_channel_serialization_name():
 273             channel = input_channel(self.gui_factory, "", True)
 274             self.unserialized_channels.append(channel)
 275             return channel
 276
 277     def serialization_get_childs(self):
 278         '''Get child objects tha required and support serialization'''
 279         childs = self.channels[:]
 280         childs.append(self.main_mix)
 281         return childs
 282
 283     def serialization_name(self):
 284         return "jack_mixer"
 285
 286     def main(self):
 287         if not self.mixer:
 288             return
 289
 290         self.window.show_all()
 291
 292         gtk.main()
 293
 294         #f = file("/dev/stdout", "w")
 295         #self.save_to_xml(f)
 296         #f.close
 297
 298 def help():
 299     print "Usage: %s [mixer_name]" % sys.argv[0]
 300
 301 def main():
 302     if lash:                        # If LASH python bindings are available
 303         # sys.argv is modified by this call
 304         lash_client = lash.init(sys.argv, "jack_mixer", lash.LASH_Config_File)
 305     else:
 306         lash_client = None
 307
 308     # check arguments
 309     args = sys.argv[1:]
 310     i = len(args)
 311     for arg in reversed(args):
 312         i -= 1
 313         if len(arg) != 0 and arg[0] == '-':
 314             if arg == "--help":
 315                 help()
 316                 return
 317             else:
 318                 print 'Unknown option "%s"' % args[i]
 319                 help()
 320                 return
 321             del args[i]
 322     #    else:
 323     #        print 'Non option argument "%s"' % args[i]
 324
 325     # Yeah , this sounds stupid, we connected earlier, but we dont want to show this if we got --help option
 326     # This issue should be fixed in pylash, there is a reason for having two functions for initialization after all
 327     if lash_client:
 328         print "Successfully connected to LASH server at " +  lash.lash_get_server_name(lash_client)
 329
 330     if len(args) == 1:
 331         name = args[0]
 332     else:
 333         name = None
 334
 335     if not name:
 336         name = "jack_mixer-%u" % os.getpid()
 337
 338     mixer = jack_mixer(name, lash_client)
 339
 340     mixer.main()
 341
 342     mixer.cleanup()
 343
 344 glade_dir = os.path.dirname(sys.argv[0])
 345
 346 # since ppl tend to run "python jack_mixer.py", lets assume that it is in current directory
 347 # "python ./jack_mixer.py" and "./jack_mixer.py" will work anyway.
 348 if not glade_dir:
 349     glade_dir = "."
 350
 351 glade_file = glade_dir + os.sep + "jack_mixer.glade"
 352
 353 if not os.path.isfile(glade_file):
 354     glade_file = glade_dir + os.sep + ".." + os.sep + "share"+ os.sep + "jack_mixer" + os.sep + "jack_mixer.glade"
 355
 356 #print 'Loading glade from "%s"' % glade_file
 357
 358 glade_xml = gtk.glade.XML(glade_file)
 359
 360 # scales suitable as meter scales
 361 meter_scales = [scale.iec_268(), scale.linear_70dB(), scale.iec_268_minimalistic()]
 362
 363 # scales suitable as volume slider scales
 364 slider_scales = [scale.linear_30dB(), scale.linear_70dB()]
 365
 366 if __name__ == "__main__":
 367     main()