675 lines
26 KiB
Python
675 lines
26 KiB
Python
#!/usr/bin/env python3
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import asyncio
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import gc
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import random
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import logging
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import os
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import re
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import weakref
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from typing import Optional, Dict, List, Any, Callable
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from dataclasses import dataclass, field
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from enum import Enum
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from fractions import Fraction
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logger = logging.getLogger(__name__)
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AIORTC_AVAILABLE = False
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try:
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from aiortc import RTCPeerConnection, RTCSessionDescription, RTCConfiguration, RTCIceServer
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from aiortc import MediaStreamTrack, RTCIceCandidate
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from aiortc.contrib.media import MediaPlayer
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import av
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AIORTC_AVAILABLE = True
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except ImportError as e:
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logger.error(f"aiortc import failed: {e}")
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class CallState(Enum):
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IDLE = "idle"
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ACTIVE = "active"
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ENDED = "ended"
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@dataclass(slots=True)
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class JingleSession:
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sid: str
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peer_jid: str
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pc: Any = None
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audio_track: Any = None
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state: CallState = CallState.IDLE
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pending_candidates: List[Any] = field(default_factory=list)
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local_candidates: List[Dict] = field(default_factory=list)
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ice_gathering_complete: asyncio.Event = field(default_factory=asyncio.Event)
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def cleanup(self):
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self.pending_candidates.clear()
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self.local_candidates.clear()
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self.pc = None
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self.audio_track = None
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class SynchronizedRadioBroadcaster:
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MAX_SUBSCRIBERS = 10
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SAMPLES_PER_FRAME = 960
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CLEANUP_INTERVAL = 200
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def __init__(self, on_track_end_callback: Optional[Callable] = None):
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self._player: Optional[MediaPlayer] = None
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self._current_source: Optional[str] = None
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self._lock = asyncio.Lock()
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self._subscribers: List[weakref.ref] = []
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self._broadcast_task: Optional[asyncio.Task] = None
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self._pts = 0
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self._time_base = Fraction(1, 48000)
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self.on_track_end = on_track_end_callback
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self._shutdown = False
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self._track_end_fired = False
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self._stopped = False
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self._frame_counter = 0
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self._resampler = None
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def _get_silence_frame(self) -> 'av.AudioFrame':
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frame = av.AudioFrame(format='s16', layout='stereo', samples=self.SAMPLES_PER_FRAME)
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frame.sample_rate = 48000
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frame.time_base = self._time_base
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for plane in frame.planes:
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plane.update(bytes(plane.buffer_size))
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frame.pts = self._pts
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self._pts += self.SAMPLES_PER_FRAME
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return frame
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async def set_source(self, source: str, force_restart: bool = False):
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async with self._lock:
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normalized_source = source
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if source and not source.startswith(('http:', 'https:', 'rtmp:', 'rtsp:')):
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normalized_source = os.path.abspath(source)
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broadcast_is_running = (
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self._broadcast_task and
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not self._broadcast_task.done()
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)
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if (normalized_source == self._current_source and
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self._player and
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broadcast_is_running and
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not force_restart):
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return
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logger.info(f"🔄 Changing broadcast: {os.path.basename(normalized_source) if normalized_source else 'None'}")
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await self._stop_broadcast_task()
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await self._close_player()
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self._current_source = normalized_source
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self._pts = 0
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self._track_end_fired = False
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self._stopped = False
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self._frame_counter = 0
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self._resampler = None
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if not source:
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return
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try:
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logger.info(f"🎵 Starting broadcast: {source}")
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options = {'rtbufsize': '8M'} if source.startswith(('http', 'rtmp', 'rtsp')) else {}
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self._player = MediaPlayer(source, options=options)
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self._broadcast_task = asyncio.create_task(self._broadcast_loop())
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except Exception as e:
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logger.error(f"MediaPlayer Error: {e}")
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self._player = None
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async def _stop_broadcast_task(self):
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if self._broadcast_task:
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self._broadcast_task.cancel()
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try:
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await asyncio.wait_for(self._broadcast_task, timeout=2.0)
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except (asyncio.CancelledError, asyncio.TimeoutError):
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pass
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self._broadcast_task = None
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async def _close_player(self):
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self._resampler = None
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if self._player:
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try:
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old_player = self._player
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self._player = None
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if hasattr(old_player, 'audio') and old_player.audio:
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try: old_player.audio.stop()
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except: pass
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if hasattr(old_player, '_container') and old_player._container:
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try: old_player._container.close()
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except: pass
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del old_player
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except Exception as e:
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logger.debug(f"Error closing player: {e}")
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gc.collect()
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async def stop_playback(self):
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async with self._lock:
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self._stopped = True
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await self._stop_broadcast_task()
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await self._close_player()
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self._current_source = None
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logger.info("⏹️ Playback stopped")
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async def _broadcast_loop(self):
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last_error_time = 0
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error_count_window = 0
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try:
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while self._player and not self._shutdown and not self._stopped:
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self._frame_counter += 1
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if self._frame_counter % self.CLEANUP_INTERVAL == 0:
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self._cleanup_subscribers()
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if not self._get_active_subscribers():
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await asyncio.sleep(0.1)
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continue
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frame = None
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try:
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if not self._player or not self._player.audio:
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break
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frame = await asyncio.wait_for(
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self._player.audio.recv(),
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timeout=0.5
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)
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current_time = asyncio.get_event_loop().time()
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if current_time - last_error_time > 5.0:
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error_count_window = 0
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if frame.format.name != 's16' or frame.sample_rate != 48000:
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if self._resampler is None:
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self._resampler = av.AudioResampler(format='s16', layout='stereo', rate=48000)
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resampled_frames = self._resampler.resample(frame)
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del frame
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if resampled_frames:
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frame = resampled_frames[0]
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else:
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continue
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frame.pts = self._pts
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frame.time_base = self._time_base
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self._pts += frame.samples
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await self._distribute_frame(frame)
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except asyncio.TimeoutError:
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s_frame = self._get_silence_frame()
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await self._distribute_frame(s_frame)
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del s_frame
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except (av.error.EOFError, StopIteration, StopAsyncIteration):
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logger.info("📻 Track ended (EOF)")
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break
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except Exception as e:
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error_msg = str(e)
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if "MediaStreamError" in str(type(e).__name__):
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break
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logger.debug(f"Broadcast frame warning: {e}")
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error_count_window += 1
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if error_count_window >= 20:
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logger.error("Too many errors, stopping broadcast")
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break
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await asyncio.sleep(0.1)
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finally:
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if frame is not None:
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del frame
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if self.on_track_end and not self._shutdown and not self._track_end_fired and not self._stopped:
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self._track_end_fired = True
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try:
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result = self.on_track_end()
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if asyncio.iscoroutine(result):
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asyncio.create_task(result)
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except Exception as e:
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logger.error(f"Track end callback error: {e}")
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.error(f"Broadcast loop error: {e}")
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finally:
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self._resampler = None
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gc.collect()
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def _cleanup_subscribers(self):
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self._subscribers = [ref for ref in self._subscribers if ref() is not None]
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def _get_active_subscribers(self) -> List['SynchronizedAudioTrack']:
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active = []
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for ref in self._subscribers:
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track = ref()
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if track is not None and track._active:
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active.append(track)
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return active
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async def _distribute_frame(self, frame: 'av.AudioFrame'):
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subscribers = self._get_active_subscribers()
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if not subscribers:
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return
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tasks = [sub._receive_frame(frame) for sub in subscribers]
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if tasks:
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await asyncio.gather(*tasks, return_exceptions=True)
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def subscribe(self, track: 'SynchronizedAudioTrack'):
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self._cleanup_subscribers()
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if len(self._subscribers) >= self.MAX_SUBSCRIBERS:
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return
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self._subscribers.append(weakref.ref(track))
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def unsubscribe(self, track: 'SynchronizedAudioTrack'):
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self._subscribers = [ref for ref in self._subscribers
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if ref() is not None and ref() is not track]
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def shutdown(self):
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self._shutdown = True
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self._resampler = None
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gc.collect()
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class SynchronizedAudioTrack(MediaStreamTrack):
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kind = "audio"
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MAX_QUEUE_SIZE = 3
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def __init__(self, broadcaster: SynchronizedRadioBroadcaster):
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super().__init__()
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self._broadcaster = broadcaster
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self._frame_queue: asyncio.Queue = asyncio.Queue(maxsize=self.MAX_QUEUE_SIZE)
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self._active = True
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self._silence_frame: Optional[av.AudioFrame] = None
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self._silence_pts = 0
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self._broadcaster.subscribe(self)
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def _get_silence_frame(self) -> 'av.AudioFrame':
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if self._silence_frame is None:
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self._silence_frame = av.AudioFrame(format='s16', layout='stereo', samples=960)
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self._silence_frame.sample_rate = 48000
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self._silence_frame.time_base = Fraction(1, 48000)
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for plane in self._silence_frame.planes:
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plane.update(bytes(plane.buffer_size))
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self._silence_frame.pts = self._silence_pts
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self._silence_pts += 960
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return self._silence_frame
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async def _receive_frame(self, frame: 'av.AudioFrame'):
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if not self._active:
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return
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try:
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if self._frame_queue.full():
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try:
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old_frame = self._frame_queue.get_nowait()
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del old_frame
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except asyncio.QueueEmpty:
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pass
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self._frame_queue.put_nowait(frame)
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except Exception:
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pass
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async def recv(self):
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if not self._active:
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raise Exception("Track stopped")
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try:
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frame = await asyncio.wait_for(
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self._frame_queue.get(),
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timeout=0.05
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)
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return frame
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except asyncio.TimeoutError:
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return self._get_silence_frame()
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def stop(self):
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self._active = False
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self._broadcaster.unsubscribe(self)
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while not self._frame_queue.empty():
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try:
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frame = self._frame_queue.get_nowait()
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del frame
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except asyncio.QueueEmpty:
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break
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if self._silence_frame is not None:
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del self._silence_frame
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self._silence_frame = None
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super().stop()
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class JingleWebRTCHandler:
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NS_JINGLE = "urn:xmpp:jingle:1"
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NS_JINGLE_ICE = "urn:xmpp:jingle:transports:ice-udp:1"
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MAX_SESSIONS = 20
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SESSION_CLEANUP_INTERVAL = 60
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def __init__(self, stun_server: str, send_transport_info_callback: Optional[Callable] = None, on_track_end: Optional[Callable] = None):
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if stun_server and not stun_server.startswith(('stun:', 'turn:', 'stuns:')):
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self.stun_server = f"stun:{stun_server}"
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else:
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self.stun_server = stun_server
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self.sessions: Dict[str, JingleSession] = {}
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self._proposed_sessions: Dict[str, str] = {}
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self._broadcaster = SynchronizedRadioBroadcaster(on_track_end_callback=on_track_end)
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self.send_transport_info = send_transport_info_callback
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self._cleanup_task: Optional[asyncio.Task] = None
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self._shutdown = False
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async def start_cleanup_task(self):
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self._cleanup_task = asyncio.create_task(self._periodic_cleanup())
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async def _periodic_cleanup(self):
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while not self._shutdown:
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await asyncio.sleep(self.SESSION_CLEANUP_INTERVAL)
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try:
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await self._cleanup_dead_sessions()
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gc.collect()
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except Exception as e:
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logger.error(f"Cleanup error: {e}")
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async def _cleanup_dead_sessions(self):
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dead_sessions = [
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sid for sid, session in self.sessions.items()
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if session.state == CallState.ENDED
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]
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for sid in dead_sessions:
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await self.stop_session(sid)
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def register_proposed_session(self, sid: str, peer_jid: str):
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if len(self._proposed_sessions) > 50:
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oldest = list(self._proposed_sessions.keys())[:25]
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for key in oldest:
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del self._proposed_sessions[key]
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self._proposed_sessions[sid] = peer_jid
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def clear_proposed_session(self, sid: str):
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self._proposed_sessions.pop(sid, None)
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def set_audio_source(self, source: str, force_restart: bool = False):
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asyncio.create_task(self._broadcaster.set_source(source, force_restart))
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async def stop_playback(self):
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await self._broadcaster.stop_playback()
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def get_session(self, sid: str):
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return self.sessions.get(sid)
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async def create_session(self, sid, peer_jid) -> JingleSession:
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if len(self.sessions) >= self.MAX_SESSIONS:
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await self._cleanup_dead_sessions()
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if len(self.sessions) >= self.MAX_SESSIONS:
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oldest = list(self.sessions.keys())[0]
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await self.stop_session(oldest)
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servers = []
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if self.stun_server:
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servers.append(RTCIceServer(urls=self.stun_server))
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config = RTCConfiguration(iceServers=servers)
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pc = RTCPeerConnection(configuration=config)
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session = JingleSession(sid=sid, peer_jid=peer_jid, pc=pc)
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self.sessions[sid] = session
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@pc.on("icegatheringstatechange")
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async def on_gathering_state():
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if pc.iceGatheringState == "complete":
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session.ice_gathering_complete.set()
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@pc.on("connectionstatechange")
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async def on_state():
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if pc.connectionState == "connected":
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session.state = CallState.ACTIVE
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elif pc.connectionState in ["failed", "closed", "disconnected"]:
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session.state = CallState.ENDED
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asyncio.create_task(self._cleanup_session(sid))
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return session
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async def _cleanup_session(self, sid: str):
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await asyncio.sleep(1)
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if sid in self.sessions:
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session = self.sessions[sid]
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if session.state == CallState.ENDED:
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await self.stop_session(sid)
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def _extract_candidates_from_sdp(self, sdp: str) -> List[Dict]:
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candidates = []
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for line in sdp.splitlines():
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if line.startswith('a=candidate:'):
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parts = line[12:].split()
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if len(parts) < 8:
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continue
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cand = {
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'foundation': parts[0],
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'component': parts[1],
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'protocol': parts[2].lower(),
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'priority': parts[3],
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'ip': parts[4],
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'port': parts[5],
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'type': parts[7],
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'generation': '0',
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'id': f"cand-{random.randint(1000, 9999)}"
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}
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for i in range(8, len(parts), 2):
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if i + 1 < len(parts):
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key = parts[i]
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val = parts[i+1]
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if key == 'raddr':
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cand['rel-addr'] = val
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elif key == 'rport':
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cand['rel-port'] = val
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elif key == 'generation':
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cand['generation'] = val
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elif key == 'network':
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cand['network'] = val
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candidates.append(cand)
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return candidates
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async def handle_session_initiate(self, jingle_xml, peer_jid, our_jid):
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sid = jingle_xml.get('sid')
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session = await self.create_session(sid, peer_jid)
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content = jingle_xml.find(f"{{{self.NS_JINGLE}}}content")
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if content is None:
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for child in jingle_xml:
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if child.tag.endswith('content'):
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content = child
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break
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content_name = content.get('name', '0') if content is not None else '0'
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sdp = self._jingle_to_sdp(jingle_xml)
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offer = RTCSessionDescription(sdp=sdp, type="offer")
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track = SynchronizedAudioTrack(self._broadcaster)
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session.audio_track = track
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session.pc.addTrack(track)
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await session.pc.setRemoteDescription(offer)
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if session.pending_candidates:
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for cand in session.pending_candidates:
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try: await session.pc.addIceCandidate(cand)
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except: pass
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session.pending_candidates.clear()
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answer = await session.pc.createAnswer()
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answer_sdp = answer.sdp.replace('a=setup:active', 'a=setup:passive')
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answer = RTCSessionDescription(sdp=answer_sdp, type="answer")
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await session.pc.setLocalDescription(answer)
|
|
|
|
try:
|
|
await asyncio.wait_for(session.ice_gathering_complete.wait(), timeout=5.0)
|
|
except asyncio.TimeoutError:
|
|
pass
|
|
|
|
if session.pc.localDescription:
|
|
session.local_candidates = self._extract_candidates_from_sdp(
|
|
session.pc.localDescription.sdp
|
|
)
|
|
|
|
jingle_xml = self._build_session_accept(session, sid, our_jid, content_name)
|
|
return session, jingle_xml
|
|
|
|
def _build_session_accept(self, session: JingleSession, sid: str, responder: str, content_name: str) -> str:
|
|
import xml.etree.ElementTree as ET
|
|
root = ET.Element('jingle', {'xmlns': self.NS_JINGLE, 'action': 'session-accept', 'sid': sid, 'responder': responder})
|
|
content = ET.SubElement(root, 'content', {'creator': 'initiator', 'name': content_name, 'senders': 'both'})
|
|
desc = ET.SubElement(content, 'description', {'xmlns': 'urn:xmpp:jingle:apps:rtp:1', 'media': 'audio'})
|
|
|
|
sdp = session.pc.localDescription.sdp
|
|
codecs = {}
|
|
for line in sdp.splitlines():
|
|
if line.startswith("a=rtpmap:"):
|
|
match = re.match(r'a=rtpmap:(\d+)\s+([^/]+)/(\d+)(?:/(\d+))?', line)
|
|
if match:
|
|
codec_id = match.group(1)
|
|
codecs[codec_id] = {'name': match.group(2), 'clockrate': match.group(3), 'channels': match.group(4) or '1', 'fmtp': {}}
|
|
elif line.startswith("a=fmtp:"):
|
|
match = re.match(r'a=fmtp:(\d+)\s+(.+)', line)
|
|
if match:
|
|
codec_id = match.group(1)
|
|
fmtp_params = {}
|
|
for param in match.group(2).split(';'):
|
|
if '=' in param:
|
|
key, val = param.strip().split('=', 1)
|
|
fmtp_params[key.strip()] = val.strip()
|
|
if codec_id in codecs:
|
|
codecs[codec_id]['fmtp'] = fmtp_params
|
|
|
|
for codec_id, codec_info in codecs.items():
|
|
pt_attrs = {'id': codec_id, 'name': codec_info['name'], 'clockrate': codec_info['clockrate']}
|
|
if codec_info['channels'] != '1': pt_attrs['channels'] = codec_info['channels']
|
|
pt = ET.SubElement(desc, 'payload-type', pt_attrs)
|
|
for param_name, param_value in codec_info['fmtp'].items():
|
|
ET.SubElement(pt, 'parameter', {'name': param_name, 'value': param_value})
|
|
|
|
ET.SubElement(desc, 'rtcp-mux')
|
|
trans = ET.SubElement(content, 'transport', {'xmlns': self.NS_JINGLE_ICE})
|
|
|
|
for line in sdp.splitlines():
|
|
if line.startswith("a=ice-ufrag:"): trans.set('ufrag', line.split(':')[1].strip())
|
|
if line.startswith("a=ice-pwd:"): trans.set('pwd', line.split(':')[1].strip())
|
|
if line.startswith("a=fingerprint:"):
|
|
parts = line.split(':', 1)[1].strip().split(None, 1)
|
|
if len(parts) == 2:
|
|
fp = ET.SubElement(trans, 'fingerprint', {'xmlns': 'urn:xmpp:jingle:apps:dtls:0', 'hash': parts[0], 'setup': 'passive'})
|
|
fp.text = parts[1]
|
|
|
|
for cand in session.local_candidates:
|
|
cand_elem = ET.SubElement(trans, 'candidate', {
|
|
'component': str(cand.get('component', '1')), 'foundation': str(cand.get('foundation', '1')),
|
|
'generation': str(cand.get('generation', '0')), 'id': cand.get('id', 'cand-0'),
|
|
'ip': cand.get('ip', ''), 'port': str(cand.get('port', '0')),
|
|
'priority': str(cand.get('priority', '1')), 'protocol': cand.get('protocol', 'udp'),
|
|
'type': cand.get('type', 'host')
|
|
})
|
|
if 'rel-addr' in cand: cand_elem.set('rel-addr', cand['rel-addr'])
|
|
if 'rel-port' in cand: cand_elem.set('rel-port', str(cand['rel-port']))
|
|
|
|
return ET.tostring(root, encoding='unicode')
|
|
|
|
async def add_ice_candidate(self, session: JingleSession, xml_cand):
|
|
try:
|
|
cand = RTCIceCandidate(
|
|
foundation=xml_cand.get('foundation', '1'), component=int(xml_cand.get('component', '1')),
|
|
protocol=xml_cand.get('protocol', 'udp'), priority=int(xml_cand.get('priority', '1')),
|
|
ip=xml_cand.get('ip'), port=int(xml_cand.get('port')), type=xml_cand.get('type', 'host'),
|
|
sdpMid="0", sdpMLineIndex=0
|
|
)
|
|
if session.pc.remoteDescription: await session.pc.addIceCandidate(cand)
|
|
else: session.pending_candidates.append(cand)
|
|
except Exception as e:
|
|
logger.debug(f"Candidate error: {e}")
|
|
|
|
async def stop_session(self, sid):
|
|
if sid in self.sessions:
|
|
s = self.sessions.pop(sid)
|
|
if s.audio_track:
|
|
try: s.audio_track.stop()
|
|
except: pass
|
|
s.audio_track = None
|
|
if s.pc:
|
|
try: await s.pc.close()
|
|
except: pass
|
|
s.pc = None
|
|
s.cleanup()
|
|
del s
|
|
logger.info(f"🔴 Stopped session {sid}")
|
|
self.clear_proposed_session(sid)
|
|
gc.collect()
|
|
|
|
async def end_all_sessions(self):
|
|
self._shutdown = True
|
|
self._broadcaster.shutdown()
|
|
if self._cleanup_task:
|
|
self._cleanup_task.cancel()
|
|
try: await self._cleanup_task
|
|
except asyncio.CancelledError: pass
|
|
self._cleanup_task = None
|
|
for sid in list(self.sessions.keys()):
|
|
await self.stop_session(sid)
|
|
self._proposed_sessions.clear()
|
|
gc.collect()
|
|
|
|
def get_active_sessions(self):
|
|
return [s for s in self.sessions.values() if s.state == CallState.ACTIVE]
|
|
|
|
def _jingle_to_sdp(self, xml):
|
|
lines = ["v=0", "o=- 0 0 IN IP4 0.0.0.0", "s=-", "t=0 0", "a=group:BUNDLE 0", "a=msid-semantic: WMS *"]
|
|
content = xml.find(f"{{urn:xmpp:jingle:1}}content")
|
|
desc = content.find(f"{{urn:xmpp:jingle:apps:rtp:1}}description")
|
|
trans = content.find(f"{{urn:xmpp:jingle:transports:ice-udp:1}}transport")
|
|
|
|
payloads = [pt.get('id') for pt in desc.findall(f"{{urn:xmpp:jingle:apps:rtp:1}}payload-type")]
|
|
lines.append(f"m=audio 9 UDP/TLS/RTP/SAVPF {' '.join(payloads)}")
|
|
lines.append("c=IN IP4 0.0.0.0")
|
|
lines.append("a=rtcp:9 IN IP4 0.0.0.0")
|
|
lines.append(f"a=ice-ufrag:{trans.get('ufrag')}")
|
|
lines.append(f"a=ice-pwd:{trans.get('pwd')}")
|
|
|
|
fp = trans.find(f"{{urn:xmpp:jingle:apps:dtls:0}}fingerprint")
|
|
if fp is not None:
|
|
lines.append(f"a=fingerprint:{fp.get('hash')} {fp.text}")
|
|
setup = fp.get('setup', 'actpass')
|
|
if setup == 'actpass': setup = 'active'
|
|
lines.append(f"a=setup:{setup}")
|
|
|
|
lines.append("a=mid:0")
|
|
lines.append("a=sendrecv")
|
|
lines.append("a=rtcp-mux")
|
|
|
|
for pt in desc.findall(f"{{urn:xmpp:jingle:apps:rtp:1}}payload-type"):
|
|
lines.append(f"a=rtpmap:{pt.get('id')} {pt.get('name')}/{pt.get('clockrate')}/{pt.get('channels', '1')}")
|
|
|
|
return "\r\n".join(lines) |