audio: Set a ReplayGainSink as the playbin's audio sink

And create a rplaygain property that acts as a passthrough for
controlling the element.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

audio/bass.py

@@ -9,17 +9,25 @@ from gi.repository import GLib
 from gi.repository import Gst
 Gst.init(sys.argv)
 
+from . import replaygain
+
+
 class BassPlayer(GObject.GObject):
     def __init__(self):
         GObject.GObject.__init__(self)
+        lib.settings.initialize("audio.replaygain", "disabled")
         lib.settings.initialize("audio.volume", 1.0)
 
-        self.video = Gst.ElementFactory.make("fakesink")
+        self.audio = replaygain.ReplayGainSink()
+        self.video  = Gst.ElementFactory.make("fakesink")
+
         self.playbin = Gst.ElementFactory.make("playbin")
         self.playbin.connect("about-to-finish", self.__about_to_finish__)
+        self.playbin.set_property("audio-sink", self.audio)
         self.playbin.set_property("video-sink", self.video)
         self.playbin.set_property("volume", lib.settings.get_float("audio.volume"))
         self.playbin.set_state(Gst.State.READY)
+        self.set_property("replaygain", lib.settings.get("audio.replaygain"))
 
         self.bus.add_signal_watch()
         self.bus.connect("message::eos", self.__eos__)
@@ -73,6 +81,15 @@ class BassPlayer(GObject.GObject):
                                  Gst.SeekFlags.FLUSH | Gst.SeekFlags.KEY_UNIT,
                                  pos)
 
+    @GObject.Property
+    def replaygain(self):
+        return self.audio.get_property("mode")
+
+    @replaygain.setter
+    def replaygain(self, mode):
+        lib.settings.set("audio.replaygain", mode)
+        self.audio.set_property("mode", mode)
+
     @GObject.Property
     def uri(self):
         return self.playbin.get_property("uri")

audio/test_bass.py

@@ -7,6 +7,7 @@ from gi.repository import GObject
 from gi.repository import GLib
 from gi.repository import Gst
 from . import bass
+from . import replaygain
 
 main_context = GLib.main_context_default()
 test_album = pathlib.Path("./data/Test Album/")
@@ -24,8 +25,10 @@ class TestBassPlayer(unittest.TestCase):
     def test_bass_player_init(self):
         base = bass.BassPlayer()
         self.assertIsInstance(base, GObject.GObject)
+        self.assertIsInstance(base.audio, replaygain.ReplayGainSink)
         self.assertIsInstance(base.video, Gst.Element)
         self.assertIsInstance(base.playbin, Gst.Element)
+        self.assertEqual(base.playbin.get_property("audio-sink"), base.audio)
         self.assertEqual(base.playbin.get_property("video-sink"), base.video)
         self.assertEqual(base.playbin.get_state(Gst.CLOCK_TIME_NONE)[1],
                          Gst.State.READY)
@@ -87,6 +90,27 @@ class TestBassPlayer(unittest.TestCase):
         while main_context.iteration(may_block=False): time.sleep(0.005)
         self.assertGreater(base.get_property("position"), 0)
 
+    def test_bass_player_replaygain(self):
+        lib.settings.reset()
+        base = bass.BassPlayer()
+        self.assertEqual(lib.settings.get("audio.replaygain"), "disabled")
+        self.assertEqual(base.get_property("replaygain"), "disabled")
+
+        base.set_property("replaygain", "track")
+        self.assertEqual(base.audio.get_property("mode"), "track")
+        self.assertEqual(base.get_property("replaygain"), "track")
+        self.assertEqual(lib.settings.get("audio.replaygain"), "track")
+
+        base.set_property("replaygain", "disabled")
+        self.assertEqual(base.audio.get_property("mode"), "disabled")
+        self.assertEqual(base.get_property("replaygain"), "disabled")
+        self.assertEqual(lib.settings.get("audio.replaygain"), "disabled")
+
+        base.set_property("replaygain", "album")
+        self.assertEqual(base.audio.get_property("mode"), "album")
+        self.assertEqual(base.get_property("replaygain"), "album")
+        self.assertEqual(lib.settings.get("audio.replaygain"), "album")
+
     def test_bass_player_uri(self):
         base = bass.BassPlayer()