Python3 Migrate

venv/lib/python3.7/site-packages/mopidy/softwaremixer/__init__.py

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+import os
+
+import mopidy
+from mopidy import config, ext
+
+
+class Extension(ext.Extension):
+
+    dist_name = "Mopidy-SoftwareMixer"
+    ext_name = "softwaremixer"
+    version = mopidy.__version__
+
+    def get_default_config(self):
+        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
+        return config.read(conf_file)
+
+    def get_config_schema(self):
+        schema = super().get_config_schema()
+        return schema
+
+    def setup(self, registry):
+        from .mixer import SoftwareMixer
+
+        registry.add("mixer", SoftwareMixer)

venv/lib/python3.7/site-packages/mopidy/softwaremixer/ext.conf

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+[softwaremixer]
+enabled = true

venv/lib/python3.7/site-packages/mopidy/softwaremixer/mixer.py

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+import logging
+
+import pykka
+
+from mopidy import mixer
+
+logger = logging.getLogger(__name__)
+
+
+class SoftwareMixer(pykka.ThreadingActor, mixer.Mixer):
+
+    name = "software"
+
+    def __init__(self, config):
+        super().__init__(config)
+
+        self._audio_mixer = None
+        self._initial_volume = None
+        self._initial_mute = None
+
+    def setup(self, mixer_ref):
+        self._audio_mixer = mixer_ref
+
+        # The Mopidy startup procedure will set the initial volume of a
+        # mixer, but this happens before the audio actor's mixer is injected
+        # into the software mixer actor and has no effect. Thus, we need to set
+        # the initial volume again.
+        if self._initial_volume is not None:
+            self.set_volume(self._initial_volume)
+        if self._initial_mute is not None:
+            self.set_mute(self._initial_mute)
+
+    def teardown(self):
+        self._audio_mixer = None
+
+    def get_volume(self):
+        if self._audio_mixer is None:
+            return None
+        return self._audio_mixer.get_volume().get()
+
+    def set_volume(self, volume):
+        if self._audio_mixer is None:
+            self._initial_volume = volume
+            return False
+        self._audio_mixer.set_volume(volume)
+        return True
+
+    def get_mute(self):
+        if self._audio_mixer is None:
+            return None
+        return self._audio_mixer.get_mute().get()
+
+    def set_mute(self, mute):
+        if self._audio_mixer is None:
+            self._initial_mute = mute
+            return False
+        self._audio_mixer.set_mute(mute)
+        return True