Adding the possibility to mute at app level mopidy

mopidy/audio/actor.py

@@ -537,6 +537,12 @@ class Audio(pykka.ThreadingActor):
 
         return self._mixer.get_volume(self._mixer_track) == volumes
 
+    def get_mute(self):
+        return self._playbin.get_property('mute')
+
+    def set_mute(self, status):
+        self._playbin.set_property('mute', bool(status))
+
     def _rescale(self, value, old=None, new=None):
         """Convert value between scales."""
         new_min, new_max = new

mopidy/core/playback.py

@@ -24,6 +24,7 @@ class PlaybackController(object):
         self._shuffled = []
         self._first_shuffle = True
         self._volume = None
+        self._mute = None
 
     def _get_backend(self):
         if self.current_tl_track is None:
@@ -288,6 +289,22 @@ class PlaybackController(object):
     volume = property(get_volume, set_volume)
     """Volume as int in range [0..100] or :class:`None`"""
 
+    def get_mute(self):
+        if self.audio:
+            return self.audio.get_mute().get()
+        else:
+            return self._mute
+
+    def set_mute(self, value):
+        value = bool(value)
+        if self.audio:
+            self.audio.set_mute(value)
+        else:
+            self._mute = value
+
+    mute = property(get_mute, set_mute)
+    """Let the audio get muted, maintaining previous volume"""
+
     ### Methods
 
     def change_track(self, tl_track, on_error_step=1):