77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
"""Linux-MPRIS-Implementierung via dbus-next."""
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import asyncio
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import logging
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from typing import Any
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logger = logging.getLogger(__name__)
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MPRIS_PREFIX = "org.mpris.MediaPlayer2."
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MPRIS_PATH = "/org/mpris/MediaPlayer2"
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PLAYER_IFACE = "org.mpris.MediaPlayer2.Player"
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DBUS_SERVICE = "org.freedesktop.DBus"
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DBUS_PATH = "/org/freedesktop/DBus"
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DBUS_IFACE = "org.freedesktop.DBus"
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class MprisController:
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def __init__(self) -> None:
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self._paused: list[str] = []
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self._bus: Any = None
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async def _ensure_bus(self) -> Any:
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if self._bus is None:
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from dbus_next.aio import MessageBus
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self._bus = await MessageBus().connect()
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return self._bus
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async def _list_player_names(self) -> list[str]:
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bus = await self._ensure_bus()
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intro = await bus.introspect(DBUS_SERVICE, DBUS_PATH)
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obj = bus.get_proxy_object(DBUS_SERVICE, DBUS_PATH, intro)
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iface = obj.get_interface(DBUS_IFACE)
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names = await iface.call_list_names()
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return [n for n in names if n.startswith(MPRIS_PREFIX)]
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async def _get_player_interface(self, bus_name: str) -> Any:
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bus = await self._ensure_bus()
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intro = await bus.introspect(bus_name, MPRIS_PATH)
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obj = bus.get_proxy_object(bus_name, MPRIS_PATH, intro)
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return obj.get_interface(PLAYER_IFACE)
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async def _pause_player(self, bus_name: str) -> str | None:
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"""Pausiert einen Player, wenn er im Status 'Playing' ist.
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Gibt den Bus-Namen zurück, wenn pausiert wurde, sonst None.
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"""
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player = await self._get_player_interface(bus_name)
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status = await player.get_playback_status()
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if status != "Playing":
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return None
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await player.call_pause()
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return bus_name
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async def pause(self) -> None:
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names = await self._list_player_names()
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results = await asyncio.gather(
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*(self._pause_player(n) for n in names),
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return_exceptions=True,
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)
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self._paused = [
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name for name in results
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if isinstance(name, str)
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]
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async def _resume_player(self, bus_name: str) -> None:
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player = await self._get_player_interface(bus_name)
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await player.call_play()
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async def resume(self) -> None:
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if not self._paused:
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return
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to_resume = self._paused
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self._paused = []
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await asyncio.gather(
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*(self._resume_player(n) for n in to_resume),
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return_exceptions=True,
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)
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