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#!/usr/bin/python
# SPDX-License-Identifier: LGPL-2.1-or-later
from __future__ import print_function
import os
import sys
import dbus
import dbus.service
import dbus.mainloop.glib
try:
from gi.repository import GObject
except ImportError:
import gobject as GObject
import bluezutils
PLAYER_IFACE = 'org.mpris.MediaPlayer2.Player'
DBUS_OM_IFACE = 'org.freedesktop.DBus.ObjectManager'
DBUS_PROP_IFACE = 'org.freedesktop.DBus.Properties'
class InvalidArgsException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.freedesktop.DBus.Error.InvalidArgs'
class Player(dbus.service.Object):
def __init__(self, bus, path, obj):
self.path = path
dbus.service.Object.__init__(self, bus, self.path)
if obj != None:
mp = dbus.Interface(bus.get_object("org.bluez", obj),
"org.bluez.MediaPlayer1")
prop = dbus.Interface(bus.get_object("org.bluez", obj),
"org.freedesktop.DBus.Properties")
self.properties = prop.GetAll("org.bluez.MediaPlayer1")
bus.add_signal_receiver(self.properties_changed, path = obj,
dbus_interface = "org.freedesktop.DBus.Properties",
signal_name = "PropertiesChanged")
else:
self.track = dbus.Dictionary({"xesam:title" : "Title",
"xesam:artist" : ["Artist"],
"xesam:album" : "Album",
"xesam:genre" : ["Genre"],
"xesam:trackNumber" : dbus.Int32(1),
"mpris:length" : dbus.Int64(10000) },
signature="sv")
self.properties = dbus.Dictionary({"PlaybackStatus" : "playing",
"Identity" : "SimplePlayer",
"LoopStatus" : "None",
"Rate" : dbus.Double(1.0),
"Shuffle" : dbus.Boolean(False),
"Metadata" : self.track,
"Volume" : dbus.Double(1.0),
"Position" : dbus.Int64(0),
"MinimumRate" : dbus.Double(1.0),
"MaximumRate" : dbus.Double(1.0),
"CanGoNext" : dbus.Boolean(False),
"CanGoPrevious" : dbus.Boolean(False),
"CanPlay" : dbus.Boolean(False),
"CanSeek" : dbus.Boolean(False),
"CanControl" : dbus.Boolean(False),
},
signature="sv")
print('Register media player with:\n\tProperties: %s' \
% (self.properties))
handler = InputHandler(self)
GObject.io_add_watch(sys.stdin, GObject.IO_IN, handler.handle)
@dbus.service.method("org.freedesktop.DBus.Properties",
in_signature="ssv", out_signature="")
def Set(self, interface, key, value):
print("Set (%s, %s)" % (key, value), file=sys.stderr)
return
def get_properties(self):
return self.properties
def get_path(self):
return dbus.ObjectPath(self.path)
@dbus.service.method("org.freedesktop.DBus.Properties",
in_signature='s', out_signature='a{sv}')
def GetAll(self, interface):
if interface != PLAYER_IFACE:
raise InvalidArgsException()
return self.get_properties()
@dbus.service.signal("org.freedesktop.DBus.Properties",
signature="sa{sv}as")
def PropertiesChanged(self, interface, properties,
invalidated = dbus.Array()):
"""PropertiesChanged(interface, properties, invalidated)
Send a PropertiesChanged signal. 'properties' is a dictionary
containing string parameters as specified in doc/media-api.txt.
"""
pass
def help(self, func):
help(self.__class__.__dict__[func])
def properties_changed(self, interface, properties, invalidated):
print("properties_changed(%s, %s)" % (properties, invalidated))
self.PropertiesChanged(interface, properties, invalidated)
class InputHandler:
commands = { 'PropertiesChanged': '(interface, properties)',
'help': '(cmd)' }
def __init__(self, player):
self.player = player
print('\n\nAvailable commands:')
for cmd in self.commands:
print('\t', cmd, self.commands[cmd], sep='')
print("\nUse python syntax to pass arguments to available methods.\n" \
"E.g.: PropertiesChanged({'Metadata' : {'Title': 'My title', \
'Album': 'my album' }})")
self.prompt()
def prompt(self):
print('\n>>> ', end='')
sys.stdout.flush()
def handle(self, fd, condition):
s = os.read(fd.fileno(), 1024).strip()
try:
cmd = s[:s.find('(')]
if not cmd in self.commands:
print("Unknown command ", cmd)
except ValueError:
print("Malformed command")
return True
try:
exec "self.player.%s" % s
except Exception as e:
print(e)
pass
self.prompt()
return True
class Application(dbus.service.Object):
def __init__(self, bus, path, obj):
self.path = '/'
self.players = []
dbus.service.Object.__init__(self, bus, self.path)
self.add_player(Player(bus, path, obj))
def get_path(self):
return dbus.ObjectPath(self.path)
def add_player(self, player):
self.players.append(player)
@dbus.service.method(DBUS_OM_IFACE, out_signature='a{oa{sa{sv}}}')
def GetManagedObjects(self):
response = {}
print('GetManagedObjects')
for player in self.players:
response[player.get_path()] = { PLAYER_IFACE:
player.get_properties() }
return response
def register_app_cb():
print('Media application registered')
def register_app_error_cb(error):
print('Failed to register application: ' + str(error))
mainloop.quit()
if __name__ == '__main__':
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
if len(sys.argv) > 1:
path = bluezutils.find_adapter(sys.argv[1]).object_path
else:
path = bluezutils.find_adapter().object_path
media = dbus.Interface(bus.get_object("org.bluez", path),
"org.bluez.Media1")
path = "/test/player"
if len(sys.argv) > 2:
app = Application(bus, path, sys.argv[2])
else:
app = Application(bus, path, None)
mainloop = GObject.MainLoop()
media.RegisterApplication(app.get_path(), {},
reply_handler=register_app_cb,
error_handler=register_app_error_cb)
mainloop.run()
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