Add MprisFrontend that connects to D-Bus' SystemBus

mopidy/frontends/mpris.py

@@ -0,0 +1,67 @@
+import logging
+import multiprocessing
+import socket
+import time
+
+try:
+    import dbus
+except ImportError as import_error:
+    from mopidy import OptionalDependencyError
+    raise OptionalDependencyError(import_error)
+
+from mopidy import get_version, settings, SettingsError
+from mopidy.frontends.base import BaseFrontend
+from mopidy.utils.process import BaseThread
+
+logger = logging.getLogger('mopidy.frontends.mpris')
+
+BUS_NAME = u'org.mpris.MediaPlayer2.mopidy'
+
+class MprisFrontend(BaseFrontend):
+    """
+    Frontend which lets you control Mopidy through the Media Player Remote
+    Interfacing Specification (MPRIS) D-Bus interface.
+
+    An example of an MPRIS client is Ubuntu's audio indicator applet.
+
+    **Dependencies:**
+
+    - ``dbus`` Python bindings. The package is named ``python-dbus`` in
+      Ubuntu/Debian.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super(MprisFrontend, self).__init__(*args, **kwargs)
+        (self.connection, other_end) = multiprocessing.Pipe()
+        self.thread = MprisFrontendThread(self.core_queue, other_end)
+
+    def start(self):
+        self.thread.start()
+
+    def destroy(self):
+        self.thread.destroy()
+
+    def process_message(self, message):
+        self.connection.send(message)
+
+
+class MprisFrontendThread(BaseThread):
+    def __init__(self, core_queue, connection):
+        super(MprisFrontendThread, self).__init__(core_queue)
+        self.name = u'MprisFrontendThread'
+        self.connection = connection
+        self.bus = None
+
+    def run_inside_try(self):
+        self.setup()
+        while True:
+            self.connection.poll(None)
+            message = self.connection.recv()
+            self.process_message(message)
+
+    def setup(self):
+        self.bus = dbus.SystemBus()
+        logger.info(u'Connected to D-Bus/MPRIS')
+
+    def process_message(self, message):
+        pass # Ignore commands for other frontends

mopidy/settings.py

@@ -52,6 +52,7 @@ DEBUG_LOG_FILENAME = u'mopidy.log'
 FRONTENDS = (
     u'mopidy.frontends.mpd.MpdFrontend',
     u'mopidy.frontends.lastfm.LastfmFrontend',
+    u'mopidy.frontends.mpris.MprisFrontend',
 )
 
 #: Which GStreamer audio sink to use in :mod:`mopidy.outputs.gstreamer`.