419 lines
15 KiB
Python
419 lines
15 KiB
Python
import logging
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import os
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try:
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import dbus
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import dbus.mainloop.glib
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import dbus.service
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import gobject
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except ImportError as import_error:
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from mopidy.exceptions import OptionalDependencyError
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raise OptionalDependencyError(import_error)
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from mopidy import settings
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from mopidy.core import PlaybackState
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from mopidy.utils.process import exit_process
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logger = logging.getLogger('mopidy.frontends.mpris')
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# Must be done before dbus.SessionBus() is called
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gobject.threads_init()
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dbus.mainloop.glib.threads_init()
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BUS_NAME = 'org.mpris.MediaPlayer2.mopidy'
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OBJECT_PATH = '/org/mpris/MediaPlayer2'
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ROOT_IFACE = 'org.mpris.MediaPlayer2'
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PLAYER_IFACE = 'org.mpris.MediaPlayer2.Player'
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class MprisObject(dbus.service.Object):
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"""Implements http://www.mpris.org/2.1/spec/"""
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properties = None
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def __init__(self, core):
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self.core = core
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self.properties = {
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ROOT_IFACE: self._get_root_iface_properties(),
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PLAYER_IFACE: self._get_player_iface_properties(),
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}
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bus_name = self._connect_to_dbus()
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dbus.service.Object.__init__(self, bus_name, OBJECT_PATH)
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def _get_root_iface_properties(self):
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return {
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'CanQuit': (True, None),
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'CanRaise': (False, None),
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# NOTE Change if adding optional track list support
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'HasTrackList': (False, None),
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'Identity': ('Mopidy', None),
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'DesktopEntry': (self.get_DesktopEntry, None),
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'SupportedUriSchemes': (self.get_SupportedUriSchemes, None),
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# NOTE Return MIME types supported by local backend if support for
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# reporting supported MIME types is added
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'SupportedMimeTypes': (dbus.Array([], signature='s'), None),
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}
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def _get_player_iface_properties(self):
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return {
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'PlaybackStatus': (self.get_PlaybackStatus, None),
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'LoopStatus': (self.get_LoopStatus, self.set_LoopStatus),
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'Rate': (1.0, self.set_Rate),
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'Shuffle': (self.get_Shuffle, self.set_Shuffle),
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'Metadata': (self.get_Metadata, None),
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'Volume': (self.get_Volume, self.set_Volume),
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'Position': (self.get_Position, None),
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'MinimumRate': (1.0, None),
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'MaximumRate': (1.0, None),
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'CanGoNext': (self.get_CanGoNext, None),
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'CanGoPrevious': (self.get_CanGoPrevious, None),
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'CanPlay': (self.get_CanPlay, None),
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'CanPause': (self.get_CanPause, None),
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'CanSeek': (self.get_CanSeek, None),
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'CanControl': (self.get_CanControl, None),
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}
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def _connect_to_dbus(self):
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logger.debug(u'Connecting to D-Bus...')
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mainloop = dbus.mainloop.glib.DBusGMainLoop()
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bus_name = dbus.service.BusName(
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BUS_NAME, dbus.SessionBus(mainloop=mainloop))
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logger.info(u'Connected to D-Bus')
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return bus_name
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def _get_track_id(self, cp_track):
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return '/com/mopidy/track/%d' % cp_track.cpid
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def _get_cpid(self, track_id):
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assert track_id.startswith('/com/mopidy/track/')
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return track_id.split('/')[-1]
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### Properties interface
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@dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
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in_signature='ss', out_signature='v')
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def Get(self, interface, prop):
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logger.debug(
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u'%s.Get(%s, %s) called',
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dbus.PROPERTIES_IFACE, repr(interface), repr(prop))
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(getter, _) = self.properties[interface][prop]
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if callable(getter):
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return getter()
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else:
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return getter
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@dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
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in_signature='s', out_signature='a{sv}')
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def GetAll(self, interface):
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logger.debug(
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u'%s.GetAll(%s) called', dbus.PROPERTIES_IFACE, repr(interface))
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getters = {}
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for key, (getter, _) in self.properties[interface].iteritems():
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getters[key] = getter() if callable(getter) else getter
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return getters
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@dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
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in_signature='ssv', out_signature='')
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def Set(self, interface, prop, value):
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logger.debug(
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u'%s.Set(%s, %s, %s) called',
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dbus.PROPERTIES_IFACE, repr(interface), repr(prop), repr(value))
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_, setter = self.properties[interface][prop]
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if setter is not None:
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setter(value)
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self.PropertiesChanged(
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interface, {prop: self.Get(interface, prop)}, [])
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@dbus.service.signal(dbus_interface=dbus.PROPERTIES_IFACE,
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signature='sa{sv}as')
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def PropertiesChanged(self, interface, changed_properties,
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invalidated_properties):
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logger.debug(
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u'%s.PropertiesChanged(%s, %s, %s) signaled',
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dbus.PROPERTIES_IFACE, interface, changed_properties,
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invalidated_properties)
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### Root interface methods
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@dbus.service.method(dbus_interface=ROOT_IFACE)
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def Raise(self):
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logger.debug(u'%s.Raise called', ROOT_IFACE)
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# Do nothing, as we do not have a GUI
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@dbus.service.method(dbus_interface=ROOT_IFACE)
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def Quit(self):
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logger.debug(u'%s.Quit called', ROOT_IFACE)
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exit_process()
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### Root interface properties
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def get_DesktopEntry(self):
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return os.path.splitext(os.path.basename(settings.DESKTOP_FILE))[0]
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def get_SupportedUriSchemes(self):
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return dbus.Array(self.core.uri_schemes.get(), signature='s')
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### Player interface methods
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Next(self):
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logger.debug(u'%s.Next called', PLAYER_IFACE)
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if not self.get_CanGoNext():
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logger.debug(u'%s.Next not allowed', PLAYER_IFACE)
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return
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self.core.playback.next().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Previous(self):
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logger.debug(u'%s.Previous called', PLAYER_IFACE)
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if not self.get_CanGoPrevious():
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logger.debug(u'%s.Previous not allowed', PLAYER_IFACE)
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return
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self.core.playback.previous().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Pause(self):
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logger.debug(u'%s.Pause called', PLAYER_IFACE)
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if not self.get_CanPause():
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logger.debug(u'%s.Pause not allowed', PLAYER_IFACE)
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return
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self.core.playback.pause().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def PlayPause(self):
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logger.debug(u'%s.PlayPause called', PLAYER_IFACE)
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if not self.get_CanPause():
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logger.debug(u'%s.PlayPause not allowed', PLAYER_IFACE)
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return
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state = self.core.playback.state.get()
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if state == PlaybackState.PLAYING:
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self.core.playback.pause().get()
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elif state == PlaybackState.PAUSED:
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self.core.playback.resume().get()
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elif state == PlaybackState.STOPPED:
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self.core.playback.play().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Stop(self):
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logger.debug(u'%s.Stop called', PLAYER_IFACE)
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if not self.get_CanControl():
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logger.debug(u'%s.Stop not allowed', PLAYER_IFACE)
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return
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self.core.playback.stop().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Play(self):
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logger.debug(u'%s.Play called', PLAYER_IFACE)
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if not self.get_CanPlay():
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logger.debug(u'%s.Play not allowed', PLAYER_IFACE)
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return
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state = self.core.playback.state.get()
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if state == PlaybackState.PAUSED:
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self.core.playback.resume().get()
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else:
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self.core.playback.play().get()
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def Seek(self, offset):
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logger.debug(u'%s.Seek called', PLAYER_IFACE)
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if not self.get_CanSeek():
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logger.debug(u'%s.Seek not allowed', PLAYER_IFACE)
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return
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offset_in_milliseconds = offset // 1000
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current_position = self.core.playback.time_position.get()
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new_position = current_position + offset_in_milliseconds
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self.core.playback.seek(new_position)
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def SetPosition(self, track_id, position):
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logger.debug(u'%s.SetPosition called', PLAYER_IFACE)
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if not self.get_CanSeek():
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logger.debug(u'%s.SetPosition not allowed', PLAYER_IFACE)
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return
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position = position // 1000
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current_cp_track = self.core.playback.current_cp_track.get()
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if current_cp_track is None:
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return
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if track_id != self._get_track_id(current_cp_track):
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return
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if position < 0:
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return
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if current_cp_track.track.length < position:
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return
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self.core.playback.seek(position)
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@dbus.service.method(dbus_interface=PLAYER_IFACE)
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def OpenUri(self, uri):
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logger.debug(u'%s.OpenUri called', PLAYER_IFACE)
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if not self.get_CanPlay():
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# NOTE The spec does not explictly require this check, but guarding
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# the other methods doesn't help much if OpenUri is open for use.
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logger.debug(u'%s.Play not allowed', PLAYER_IFACE)
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return
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# NOTE Check if URI has MIME type known to the backend, if MIME support
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# is added to the backend.
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uri_schemes = self.core.uri_schemes.get()
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if not any([uri.startswith(uri_scheme) for uri_scheme in uri_schemes]):
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return
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track = self.core.library.lookup(uri).get()
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if track is not None:
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cp_track = self.core.current_playlist.add(track).get()
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self.core.playback.play(cp_track)
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else:
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logger.debug(u'Track with URI "%s" not found in library.', uri)
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### Player interface signals
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@dbus.service.signal(dbus_interface=PLAYER_IFACE, signature='x')
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def Seeked(self, position):
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logger.debug(u'%s.Seeked signaled', PLAYER_IFACE)
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# Do nothing, as just calling the method is enough to emit the signal.
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### Player interface properties
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def get_PlaybackStatus(self):
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state = self.core.playback.state.get()
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if state == PlaybackState.PLAYING:
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return 'Playing'
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elif state == PlaybackState.PAUSED:
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return 'Paused'
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elif state == PlaybackState.STOPPED:
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return 'Stopped'
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def get_LoopStatus(self):
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repeat = self.core.playback.repeat.get()
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single = self.core.playback.single.get()
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if not repeat:
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return 'None'
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else:
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if single:
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return 'Track'
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else:
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return 'Playlist'
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def set_LoopStatus(self, value):
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if not self.get_CanControl():
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logger.debug(u'Setting %s.LoopStatus not allowed', PLAYER_IFACE)
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return
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if value == 'None':
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self.core.playback.repeat = False
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self.core.playback.single = False
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elif value == 'Track':
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self.core.playback.repeat = True
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self.core.playback.single = True
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elif value == 'Playlist':
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self.core.playback.repeat = True
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self.core.playback.single = False
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def set_Rate(self, value):
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if not self.get_CanControl():
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# NOTE The spec does not explictly require this check, but it was
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# added to be consistent with all the other property setters.
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logger.debug(u'Setting %s.Rate not allowed', PLAYER_IFACE)
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return
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if value == 0:
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self.Pause()
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def get_Shuffle(self):
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return self.core.playback.random.get()
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def set_Shuffle(self, value):
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if not self.get_CanControl():
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logger.debug(u'Setting %s.Shuffle not allowed', PLAYER_IFACE)
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return
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if value:
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self.core.playback.random = True
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else:
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self.core.playback.random = False
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def get_Metadata(self):
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current_cp_track = self.core.playback.current_cp_track.get()
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if current_cp_track is None:
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return {'mpris:trackid': ''}
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else:
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(_, track) = current_cp_track
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metadata = {'mpris:trackid': self._get_track_id(current_cp_track)}
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if track.length:
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metadata['mpris:length'] = track.length * 1000
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if track.uri:
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metadata['xesam:url'] = track.uri
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if track.name:
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metadata['xesam:title'] = track.name
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if track.artists:
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artists = list(track.artists)
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artists.sort(key=lambda a: a.name)
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metadata['xesam:artist'] = dbus.Array(
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[a.name for a in artists if a.name], signature='s')
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if track.album and track.album.name:
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metadata['xesam:album'] = track.album.name
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if track.album and track.album.artists:
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artists = list(track.album.artists)
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artists.sort(key=lambda a: a.name)
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metadata['xesam:albumArtist'] = dbus.Array(
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[a.name for a in artists if a.name], signature='s')
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if track.track_no:
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metadata['xesam:trackNumber'] = track.track_no
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return dbus.Dictionary(metadata, signature='sv')
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def get_Volume(self):
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volume = self.core.playback.volume.get()
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if volume is None:
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return 0
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return volume / 100.0
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def set_Volume(self, value):
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if not self.get_CanControl():
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logger.debug(u'Setting %s.Volume not allowed', PLAYER_IFACE)
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return
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if value is None:
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return
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elif value < 0:
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self.core.playback.volume = 0
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elif value > 1:
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self.core.playback.volume = 100
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elif 0 <= value <= 1:
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self.core.playback.volume = int(value * 100)
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def get_Position(self):
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return self.core.playback.time_position.get() * 1000
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def get_CanGoNext(self):
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if not self.get_CanControl():
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return False
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return (
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self.core.playback.cp_track_at_next.get() !=
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self.core.playback.current_cp_track.get())
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def get_CanGoPrevious(self):
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if not self.get_CanControl():
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return False
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return (
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self.core.playback.cp_track_at_previous.get() !=
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self.core.playback.current_cp_track.get())
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def get_CanPlay(self):
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if not self.get_CanControl():
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return False
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return (
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self.core.playback.current_track.get() is not None or
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self.core.playback.track_at_next.get() is not None)
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def get_CanPause(self):
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if not self.get_CanControl():
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return False
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# NOTE Should be changed to vary based on capabilities of the current
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# track if Mopidy starts supporting non-seekable media, like streams.
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return True
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def get_CanSeek(self):
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if not self.get_CanControl():
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return False
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# NOTE Should be changed to vary based on capabilities of the current
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# track if Mopidy starts supporting non-seekable media, like streams.
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return True
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def get_CanControl(self):
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# NOTE This could be a setting for the end user to change.
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return True
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