Add set_metadata to allow taginjection for shoutcast stream

mopidy/backends/spotify/playback.py

@@ -21,6 +21,7 @@ class SpotifyPlaybackProvider(BasePlaybackProvider):
                 Link.from_string(track.uri).as_track())
             self.backend.spotify.session.play(1)
             self.backend.output.play_uri('appsrc://')
+            self.backend.output.set_metadata(track)
             return True
         except SpotifyError as e:
             logger.warning('Play %s failed: %s', track.uri, e)

mopidy/outputs/base.py

@@ -89,3 +89,17 @@ class BaseOutput(object):
         :rtype: :class:`True` if successful, else :class:`False`
         """
         raise NotImplementedError
+
+    def set_metadata(self, track):
+        """
+        Set track metadata for currently playing song.
+
+        Only needs to be called by sources such as appsrc which don't already
+        inject tags in pipeline.
+
+        *MUST be implemented by subclass.*
+
+        :param track: Track containing metadata for current song.
+        :type track: :class:`mopidy.modes.Track`
+        """
+        raise NotImplementedError

mopidy/outputs/gstreamer.py

@@ -197,3 +197,12 @@ class GStreamerOutput(ThreadingActor, BaseOutput):
         """Set volume in range [0..100]"""
         self.gst_volume.set_property('volume', volume / 100.0)
         return True
+
+    def set_metadata(self, track):
+        tags = u'artist="%(artist)s",title="%(title)s",album="%(album)s"' % {
+            'artist': u', '.join([a.name for a in track.artists]),
+            'title': track.name,
+            'album': track.album.name,
+        }
+        logger.debug('Setting tags to: %s', tags)
+        self.gst_taginject.set_property('tags', tags)