Enable support for pulseaudio ducking

mycroft/audio/audioservice.py

@@ -25,10 +25,6 @@
 
 from .services import RemoteAudioBackend
 
-try:
-    import pulsectl
-except ImportError:
-    pulsectl = None
 
 MAINMODULE = '__init__'
 sys.path.append(abspath(dirname(__file__)))
@@ -147,13 +143,7 @@ def __init__(self, bus):
         self.current = None
         self.play_start_time = 0
         self.volume_is_low = False
-        self.pulse = None
-        self.pulse_quiet = None
-        self.pulse_restore = None
 
-        self.muted_sinks = []
-        # Setup control of pulse audio
-        self.setup_pulseaudio_handlers(self.config.get('pulseaudio'))
         bus.once('open', self.load_services_callback)
 
     def load_services_callback(self):
@@ -282,52 +272,6 @@ def _lower_volume(self, message=None):
             LOG.debug('lowering volume')
             self.current.lower_volume()
             self.volume_is_low = True
-        try:
-            if self.pulse_quiet:
-                self.pulse_quiet()
-        except Exception as exc:
-            LOG.error(exc)
-
-    def pulse_mute(self):
-        """
-            Mute all pulse audio input sinks except for the one named
-            'mycroft-voice'.
-        """
-        for sink in self.pulse.sink_input_list():
-            if sink.name != 'mycroft-voice':
-                self.pulse.sink_input_mute(sink.index, 1)
-                self.muted_sinks.append(sink.index)
-
-    def pulse_unmute(self):
-        """
-            Unmute all pulse audio input sinks.
-        """
-        for sink in self.pulse.sink_input_list():
-            if sink.index in self.muted_sinks:
-                self.pulse.sink_input_mute(sink.index, 0)
-        self.muted_sinks = []
-
-    def pulse_lower_volume(self):
-        """
-            Lower volume of all pulse audio input sinks except the one named
-            'mycroft-voice'.
-        """
-        for sink in self.pulse.sink_input_list():
-            if sink.name != 'mycroft-voice':
-                volume = sink.volume
-                volume.value_flat *= 0.3
-                self.pulse.volume_set(sink, volume)
-
-    def pulse_restore_volume(self):
-        """
-            Restore volume of all pulse audio input sinks except the one named
-            'mycroft-voice'.
-        """
-        for sink in self.pulse.sink_input_list():
-            if sink.name != 'mycroft-voice':
-                volume = sink.volume
-                volume.value_flat /= 0.3
-                self.pulse.volume_set(sink, volume)
 
     def _restore_volume(self, message):
         """
@@ -342,8 +286,6 @@ def _restore_volume(self, message):
             time.sleep(2)
             if not self.volume_is_low:
                 self.current.restore_volume()
-        if self.pulse_restore:
-            self.pulse_restore()
 
     def play(self, tracks, prefered_service, repeat=False):
         """
@@ -465,23 +407,6 @@ def _seek_backward(self, message):
         if self.current:
             self.current.seek_backward(seconds)
 
-    def setup_pulseaudio_handlers(self, pulse_choice=None):
-        """
-            Select functions for handling lower volume/restore of
-            pulse audio input sinks.
-
-            Args:
-                pulse_choice: method selection, can be eithe 'mute' or 'lower'
-        """
-        if pulsectl and pulse_choice:
-            self.pulse = pulsectl.Pulse('Mycroft-audio-service')
-            if pulse_choice == 'mute':
-                self.pulse_quiet = self.pulse_mute
-                self.pulse_restore = self.pulse_unmute
-            elif pulse_choice == 'lower':
-                self.pulse_quiet = self.pulse_lower_volume
-                self.pulse_restore = self.pulse_restore_volume
-
     def shutdown(self):
         for s in self.service:
             try:

mycroft/configuration/mycroft.conf

@@ -277,6 +277,7 @@
   // Override: REMOTE
   "tts": {
     // Engine.  Options: "mimic", "google", "marytts", "fatts", "espeak", "spdsay", "responsive_voice"
+    "pulse_duck": false,
     "module": "mimic",
     "mimic": {
       "voice": "ap"