Remove concurrent heartbeat pings on the same MPD client

- idle() and periodic ping() on one connection can cause churn/wakeups

- Normalized mixrampdb == "nan" to 0

src/mpd_now_playable/mpd/convert/to_playback.py

@@ -17,10 +17,13 @@ def to_queue(mpd: MpdState) -> Queue:
 
 def to_mixramp(mpd: MpdState) -> MixRamp:
 	delay = mpd.status.get("mixrampdelay", 0)
+	db = mpd.status.get("mixrampdb", 0)
 	if delay == "nan":
 		delay = 0
+	if db == "nan":
+		db = 0
 	return MixRamp(
-		db=float(mpd.status.get("mixrampdb", 0)),
+		db=float(db),
 		delay=float(delay),
 	)
 

src/mpd_now_playable/mpd/listener.py

@@ -11,7 +11,6 @@ from ..playback import Playback
 from ..playback.state import PlaybackState
 from ..player import Player
 from ..song_receiver import Receiver
-from ..tools.asyncio import run_background_task
 from .artwork_cache import MpdArtworkCache
 from .convert.to_playback import to_playback
 from .types import MpdState
@@ -42,12 +41,6 @@ class MpdStateListener(Player):
 			print("Authorising to MPD with your password...")
 			await self.client.password(conf.password.get_secret_value())
 		print(f"Connected to MPD v{self.client.mpd_version}")
-		run_background_task(self.heartbeat())
-
-	async def heartbeat(self) -> None:
-		while True:
-			await self.client.ping()
-			await asyncio.sleep(10)
 
 	async def refresh(self) -> None:
 		await self.update_receivers()