libsaria: Set volume using new preferences

I somehow missed this earlier...

libsaria/audio/__init__.py

@@ -5,6 +5,7 @@ import datetime
 import threading
 import pipeline
 from libsaria import callbacks
+from libsaria import prefs
 
 timedelta    = datetime.timedelta
 audio_lock   = threading.Lock()
@@ -57,6 +58,12 @@ def seek(amount):
 	pipeline.seek(amount)
 	unlock_audio()
 
+def set_volume(prcnt):
+	lock_audio()
+	pipeline.set_volume(prcnt)
+	unlock_audio()
+	prefs.set("libsaria.audio.volume", prcnt)
+
 def position():
 	lock_audio()
 	pos = pipeline.position()

libsaria/audio/pipeline.py

@@ -55,3 +55,5 @@ def seek(amount):
 		return
 	seek_to( pos + (amount * 1000000000) )
 
+def set_volume(prcnt):
+	player.set_property("volume", prcnt)