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from __future__ import annotations
import json
import shutil
import subprocess
import threading
import time
from dataclasses import dataclass
from pathlib import Path
@dataclass
class PlayerState:
station_name: str = ""
stream_url: str = ""
media_title: str = ""
volume: int = 50
muted: bool = False
playing: bool = False
offline: bool = False
class MpvPlayer:
def __init__(self, socket_path: Path | None = None) -> None:
self.socket_path = socket_path or Path("/tmp/radio_tui_mpvsocket")
self.state = PlayerState()
self._process: subprocess.Popen[bytes] | None = None
self._poll_thread: threading.Thread | None = None
self._stop_polling = threading.Event()
self._lock = threading.Lock()
@property
def available(self) -> bool:
return shutil.which("mpv") is not None and shutil.which("socat") is not None
def _ipc(self, command: list[str]) -> dict | None:
if not self.socket_path.exists():
return None
payload = json.dumps({"command": command}) + "\n"
try:
result = subprocess.run(
["socat", "-", str(self.socket_path)],
input=payload.encode(),
capture_output=True,
timeout=2,
check=False,
)
except (OSError, subprocess.TimeoutExpired):
return None
if not result.stdout:
return None
try:
return json.loads(result.stdout.decode())
except json.JSONDecodeError:
return None
def _ensure_mpv(self, stream_url: str, volume: int) -> None:
if self._process and self._process.poll() is None:
return
self._stop_polling.set()
if self._poll_thread:
self._poll_thread.join(timeout=1)
self._stop_polling.clear()
if self.socket_path.exists():
self.socket_path.unlink(missing_ok=True)
self._process = subprocess.Popen(
[
"mpv",
f"--volume={volume}",
f"--input-ipc-server={self.socket_path}",
"--idle=yes",
"--no-terminal",
],
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
)
for _ in range(30):
if self.socket_path.exists():
break
time.sleep(0.1)
def play(self, station_name: str, stream_url: str) -> None:
with self._lock:
volume = self.state.volume
self._ensure_mpv(stream_url, volume)
if self._process and self._process.poll() is None and self.socket_path.exists():
self._ipc(["loadfile", stream_url])
self.state.station_name = station_name
self.state.stream_url = stream_url
self.state.media_title = "Connecting..."
self.state.playing = True
self.state.offline = False
self._start_poll()
def stop(self) -> None:
with self._lock:
self._stop_polling.set()
if self._poll_thread:
self._poll_thread.join(timeout=1)
if self._process and self._process.poll() is None:
self._process.terminate()
try:
self._process.wait(timeout=2)
except subprocess.TimeoutExpired:
self._process.kill()
self._process = None
self.socket_path.unlink(missing_ok=True)
self.state = PlayerState(volume=self.state.volume)
def adjust_volume(self, delta: int) -> None:
with self._lock:
self._ipc(["add", "volume", delta])
response = self._ipc(["get_property", "volume"])
if response and "data" in response:
self.state.volume = int(response["data"])
def toggle_mute(self) -> None:
with self._lock:
self._ipc(["cycle", "mute"])
response = self._ipc(["get_property", "mute"])
if response and "data" in response:
self.state.muted = bool(response["data"])
def _start_poll(self) -> None:
if self._poll_thread and self._poll_thread.is_alive():
self._stop_polling.set()
self._poll_thread.join(timeout=1)
self._stop_polling.clear()
def poll() -> None:
misses = 0
while not self._stop_polling.is_set():
response = self._ipc(["get_property", "media-title"])
title = ""
if response and response.get("data"):
title = str(response["data"])
if title:
misses = 0
with self._lock:
self.state.media_title = title
self.state.offline = title == "Station Offline"
else:
misses += 1
if misses >= 3:
with self._lock:
self.state.media_title = "Station Offline"
self.state.offline = True
self._stop_polling.wait(3)
self._poll_thread = threading.Thread(target=poll, daemon=True)
self._poll_thread.start()
def snapshot(self) -> PlayerState:
with self._lock:
return PlayerState(
station_name=self.state.station_name,
stream_url=self.state.stream_url,
media_title=self.state.media_title,
volume=self.state.volume,
muted=self.state.muted,
playing=self.state.playing,
offline=self.state.offline,
)
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