654 lines
24 KiB
Python
654 lines
24 KiB
Python
#
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# Copyright (c) 2024–2025, Daily
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#
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# SPDX-License-Identifier: BSD 2-Clause License
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#
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import asyncio
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from dataclasses import dataclass
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from typing import Any, Awaitable, Callable, List, Optional
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from loguru import logger
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from pydantic import BaseModel
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from pipecat.audio.utils import create_default_resampler
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from pipecat.audio.vad.vad_analyzer import VADAnalyzer
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from pipecat.frames.frames import (
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AudioRawFrame,
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CancelFrame,
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EndFrame,
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OutputAudioRawFrame,
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StartFrame,
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TransportMessageFrame,
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TransportMessageUrgentFrame,
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UserAudioRawFrame,
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)
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from pipecat.processors.frame_processor import FrameDirection, FrameProcessorSetup
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from pipecat.transports.base_input import BaseInputTransport
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from pipecat.transports.base_output import BaseOutputTransport
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from pipecat.transports.base_transport import BaseTransport, TransportParams
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from pipecat.utils.asyncio.task_manager import BaseTaskManager
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from pipecat.utils.asyncio.watchdog_async_iterator import WatchdogAsyncIterator
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try:
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from livekit import rtc
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from tenacity import retry, stop_after_attempt, wait_exponential
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except ModuleNotFoundError as e:
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logger.error(f"Exception: {e}")
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logger.error("In order to use LiveKit, you need to `pip install pipecat-ai[livekit]`.")
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raise Exception(f"Missing module: {e}")
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@dataclass
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class LiveKitTransportMessageFrame(TransportMessageFrame):
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participant_id: Optional[str] = None
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@dataclass
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class LiveKitTransportMessageUrgentFrame(TransportMessageUrgentFrame):
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participant_id: Optional[str] = None
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class LiveKitParams(TransportParams):
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pass
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class LiveKitCallbacks(BaseModel):
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on_connected: Callable[[], Awaitable[None]]
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on_disconnected: Callable[[], Awaitable[None]]
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on_participant_connected: Callable[[str], Awaitable[None]]
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on_participant_disconnected: Callable[[str], Awaitable[None]]
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on_audio_track_subscribed: Callable[[str], Awaitable[None]]
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on_audio_track_unsubscribed: Callable[[str], Awaitable[None]]
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on_data_received: Callable[[bytes, str], Awaitable[None]]
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on_first_participant_joined: Callable[[str], Awaitable[None]]
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class LiveKitTransportClient:
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def __init__(
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self,
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url: str,
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token: str,
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room_name: str,
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params: LiveKitParams,
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callbacks: LiveKitCallbacks,
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transport_name: str,
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):
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self._url = url
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self._token = token
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self._room_name = room_name
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self._params = params
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self._callbacks = callbacks
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self._transport_name = transport_name
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self._room: Optional[rtc.Room] = None
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self._participant_id: str = ""
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self._connected = False
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self._disconnect_counter = 0
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self._audio_source: Optional[rtc.AudioSource] = None
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self._audio_track: Optional[rtc.LocalAudioTrack] = None
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self._audio_tracks = {}
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self._audio_queue = asyncio.Queue()
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self._other_participant_has_joined = False
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self._task_manager: Optional[BaseTaskManager] = None
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@property
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def participant_id(self) -> str:
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return self._participant_id
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@property
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def room(self) -> rtc.Room:
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if not self._room:
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raise Exception(f"{self}: missing room object (pipeline not started?)")
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return self._room
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async def setup(self, setup: FrameProcessorSetup):
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if self._task_manager:
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return
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self._task_manager = setup.task_manager
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self._room = rtc.Room(loop=self._task_manager.get_event_loop())
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# Set up room event handlers
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self.room.on("participant_connected")(self._on_participant_connected_wrapper)
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self.room.on("participant_disconnected")(self._on_participant_disconnected_wrapper)
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self.room.on("track_subscribed")(self._on_track_subscribed_wrapper)
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self.room.on("track_unsubscribed")(self._on_track_unsubscribed_wrapper)
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self.room.on("data_received")(self._on_data_received_wrapper)
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self.room.on("connected")(self._on_connected_wrapper)
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self.room.on("disconnected")(self._on_disconnected_wrapper)
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async def cleanup(self):
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await self.disconnect()
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async def start(self, frame: StartFrame):
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self._out_sample_rate = self._params.audio_out_sample_rate or frame.audio_out_sample_rate
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@retry(stop=stop_after_attempt(3), wait=wait_exponential(multiplier=1, min=4, max=10))
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async def connect(self):
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if self._connected:
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# Increment disconnect counter if already connected.
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self._disconnect_counter += 1
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return
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logger.info(f"Connecting to {self._room_name}")
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try:
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await self.room.connect(
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self._url,
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self._token,
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options=rtc.RoomOptions(auto_subscribe=True),
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)
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self._connected = True
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# Increment disconnect counter if we successfully connected.
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self._disconnect_counter += 1
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self._participant_id = self.room.local_participant.sid
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logger.info(f"Connected to {self._room_name}")
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# Set up audio source and track
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self._audio_source = rtc.AudioSource(
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self._out_sample_rate, self._params.audio_out_channels
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)
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self._audio_track = rtc.LocalAudioTrack.create_audio_track(
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"pipecat-audio", self._audio_source
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)
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options = rtc.TrackPublishOptions()
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options.source = rtc.TrackSource.SOURCE_MICROPHONE
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await self.room.local_participant.publish_track(self._audio_track, options)
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await self._callbacks.on_connected()
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# Check if there are already participants in the room
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participants = self.get_participants()
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if participants and not self._other_participant_has_joined:
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self._other_participant_has_joined = True
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await self._callbacks.on_first_participant_joined(participants[0])
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except Exception as e:
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logger.error(f"Error connecting to {self._room_name}: {e}")
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raise
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async def disconnect(self):
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# Decrement leave counter when leaving.
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self._disconnect_counter -= 1
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if not self._connected or self._disconnect_counter > 0:
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return
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logger.info(f"Disconnecting from {self._room_name}")
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await self.room.disconnect()
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self._connected = False
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logger.info(f"Disconnected from {self._room_name}")
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await self._callbacks.on_disconnected()
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async def send_data(self, data: bytes, participant_id: Optional[str] = None):
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if not self._connected:
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return
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try:
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if participant_id:
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await self.room.local_participant.publish_data(
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data, reliable=True, destination_identities=[participant_id]
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)
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else:
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await self.room.local_participant.publish_data(data, reliable=True)
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except Exception as e:
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logger.error(f"Error sending data: {e}")
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async def publish_audio(self, audio_frame: rtc.AudioFrame):
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if not self._connected or not self._audio_source:
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return
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try:
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await self._audio_source.capture_frame(audio_frame)
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except Exception as e:
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logger.error(f"Error publishing audio: {e}")
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def get_participants(self) -> List[str]:
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return [p.sid for p in self.room.remote_participants.values()]
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async def get_participant_metadata(self, participant_id: str) -> dict:
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participant = self.room.remote_participants.get(participant_id)
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if participant:
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return {
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"id": participant.sid,
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"name": participant.name,
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"metadata": participant.metadata,
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"is_speaking": participant.is_speaking,
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}
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return {}
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async def set_participant_metadata(self, metadata: str):
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await self.room.local_participant.set_metadata(metadata)
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async def mute_participant(self, participant_id: str):
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participant = self.room.remote_participants.get(participant_id)
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if participant:
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for track in participant.tracks.values():
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if track.kind == "audio":
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await track.set_enabled(False)
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async def unmute_participant(self, participant_id: str):
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participant = self.room.remote_participants.get(participant_id)
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if participant:
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for track in participant.tracks.values():
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if track.kind == "audio":
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await track.set_enabled(True)
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# Wrapper methods for event handlers
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def _on_participant_connected_wrapper(self, participant: rtc.RemoteParticipant):
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self._task_manager.create_task(
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self._async_on_participant_connected(participant),
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f"{self}::_async_on_participant_connected",
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)
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def _on_participant_disconnected_wrapper(self, participant: rtc.RemoteParticipant):
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self._task_manager.create_task(
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self._async_on_participant_disconnected(participant),
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f"{self}::_async_on_participant_disconnected",
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)
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def _on_track_subscribed_wrapper(
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self,
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track: rtc.Track,
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publication: rtc.RemoteTrackPublication,
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participant: rtc.RemoteParticipant,
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):
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self._task_manager.create_task(
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self._async_on_track_subscribed(track, publication, participant),
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f"{self}::_async_on_track_subscribed",
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)
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def _on_track_unsubscribed_wrapper(
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self,
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track: rtc.Track,
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publication: rtc.RemoteTrackPublication,
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participant: rtc.RemoteParticipant,
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):
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self._task_manager.create_task(
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self._async_on_track_unsubscribed(track, publication, participant),
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f"{self}::_async_on_track_unsubscribed",
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)
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def _on_data_received_wrapper(self, data: rtc.DataPacket):
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self._task_manager.create_task(
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self._async_on_data_received(data),
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f"{self}::_async_on_data_received",
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)
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def _on_connected_wrapper(self):
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self._task_manager.create_task(self._async_on_connected(), f"{self}::_async_on_connected")
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def _on_disconnected_wrapper(self):
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self._task_manager.create_task(
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self._async_on_disconnected(), f"{self}::_async_on_disconnected"
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)
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# Async methods for event handling
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async def _async_on_participant_connected(self, participant: rtc.RemoteParticipant):
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logger.info(f"Participant connected: {participant.identity}")
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await self._callbacks.on_participant_connected(participant.sid)
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if not self._other_participant_has_joined:
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self._other_participant_has_joined = True
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await self._callbacks.on_first_participant_joined(participant.sid)
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async def _async_on_participant_disconnected(self, participant: rtc.RemoteParticipant):
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logger.info(f"Participant disconnected: {participant.identity}")
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await self._callbacks.on_participant_disconnected(participant.sid)
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if len(self.get_participants()) == 0:
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self._other_participant_has_joined = False
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async def _async_on_track_subscribed(
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self,
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track: rtc.Track,
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publication: rtc.RemoteTrackPublication,
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participant: rtc.RemoteParticipant,
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):
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if track.kind == rtc.TrackKind.KIND_AUDIO:
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logger.info(f"Audio track subscribed: {track.sid} from participant {participant.sid}")
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self._audio_tracks[participant.sid] = track
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audio_stream = rtc.AudioStream(track)
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self._task_manager.create_task(
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self._process_audio_stream(audio_stream, participant.sid),
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f"{self}::_process_audio_stream",
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)
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async def _async_on_track_unsubscribed(
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self,
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track: rtc.Track,
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publication: rtc.RemoteTrackPublication,
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participant: rtc.RemoteParticipant,
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):
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logger.info(f"Track unsubscribed: {publication.sid} from {participant.identity}")
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if track.kind == rtc.TrackKind.KIND_AUDIO:
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await self._callbacks.on_audio_track_unsubscribed(participant.sid)
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async def _async_on_data_received(self, data: rtc.DataPacket):
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await self._callbacks.on_data_received(data.data, data.participant.sid)
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async def _async_on_connected(self):
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await self._callbacks.on_connected()
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async def _async_on_disconnected(self, reason=None):
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self._connected = False
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logger.info(f"Disconnected from {self._room_name}. Reason: {reason}")
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await self._callbacks.on_disconnected()
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async def _process_audio_stream(self, audio_stream: rtc.AudioStream, participant_id: str):
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logger.info(f"Started processing audio stream for participant {participant_id}")
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async for event in audio_stream:
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if isinstance(event, rtc.AudioFrameEvent):
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await self._audio_queue.put((event, participant_id))
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else:
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logger.warning(f"Received unexpected event type: {type(event)}")
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async def get_next_audio_frame(self):
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while True:
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frame, participant_id = await self._audio_queue.get()
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yield frame, participant_id
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def __str__(self):
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return f"{self._transport_name}::LiveKitTransportClient"
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class LiveKitInputTransport(BaseInputTransport):
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def __init__(
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self,
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transport: BaseTransport,
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client: LiveKitTransportClient,
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params: LiveKitParams,
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**kwargs,
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):
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super().__init__(params, **kwargs)
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self._transport = transport
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self._client = client
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self._audio_in_task = None
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self._vad_analyzer: Optional[VADAnalyzer] = params.vad_analyzer
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self._resampler = create_default_resampler()
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# Whether we have seen a StartFrame already.
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self._initialized = False
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@property
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def vad_analyzer(self) -> Optional[VADAnalyzer]:
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return self._vad_analyzer
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async def start(self, frame: StartFrame):
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await super().start(frame)
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if self._initialized:
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return
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self._initialized = True
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await self._client.start(frame)
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await self._client.connect()
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if not self._audio_in_task and self._params.audio_in_enabled:
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self._audio_in_task = self.create_task(self._audio_in_task_handler())
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await self.set_transport_ready(frame)
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logger.info("LiveKitInputTransport started")
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async def stop(self, frame: EndFrame):
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await super().stop(frame)
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await self._client.disconnect()
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if self._audio_in_task:
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await self.cancel_task(self._audio_in_task)
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logger.info("LiveKitInputTransport stopped")
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async def cancel(self, frame: CancelFrame):
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await super().cancel(frame)
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await self._client.disconnect()
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if self._audio_in_task and self._params.audio_in_enabled:
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await self.cancel_task(self._audio_in_task)
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async def setup(self, setup: FrameProcessorSetup):
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await super().setup(setup)
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await self._client.setup(setup)
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async def cleanup(self):
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await super().cleanup()
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await self._transport.cleanup()
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async def push_app_message(self, message: Any, sender: str):
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frame = LiveKitTransportMessageUrgentFrame(message=message, participant_id=sender)
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await self.push_frame(frame)
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async def _audio_in_task_handler(self):
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logger.info("Audio input task started")
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audio_iterator = self._client.get_next_audio_frame()
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async for audio_data in WatchdogAsyncIterator(audio_iterator, manager=self.task_manager):
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if audio_data:
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audio_frame_event, participant_id = audio_data
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pipecat_audio_frame = await self._convert_livekit_audio_to_pipecat(
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audio_frame_event
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)
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input_audio_frame = UserAudioRawFrame(
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user_id=participant_id,
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audio=pipecat_audio_frame.audio,
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sample_rate=pipecat_audio_frame.sample_rate,
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num_channels=pipecat_audio_frame.num_channels,
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)
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await self.push_audio_frame(input_audio_frame)
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async def _convert_livekit_audio_to_pipecat(
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self, audio_frame_event: rtc.AudioFrameEvent
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) -> AudioRawFrame:
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audio_frame = audio_frame_event.frame
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audio_data = await self._resampler.resample(
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audio_frame.data.tobytes(), audio_frame.sample_rate, self.sample_rate
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)
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return AudioRawFrame(
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audio=audio_data,
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sample_rate=self.sample_rate,
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num_channels=audio_frame.num_channels,
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)
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class LiveKitOutputTransport(BaseOutputTransport):
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def __init__(
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self,
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transport: BaseTransport,
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client: LiveKitTransportClient,
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params: LiveKitParams,
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**kwargs,
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):
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super().__init__(params, **kwargs)
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self._transport = transport
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self._client = client
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# Whether we have seen a StartFrame already.
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self._initialized = False
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async def start(self, frame: StartFrame):
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await super().start(frame)
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if self._initialized:
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return
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self._initialized = True
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await self._client.start(frame)
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await self._client.connect()
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await self.set_transport_ready(frame)
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logger.info("LiveKitOutputTransport started")
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async def stop(self, frame: EndFrame):
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await super().stop(frame)
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await self._client.disconnect()
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logger.info("LiveKitOutputTransport stopped")
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async def cancel(self, frame: CancelFrame):
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await super().cancel(frame)
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await self._client.disconnect()
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async def setup(self, setup: FrameProcessorSetup):
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await super().setup(setup)
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await self._client.setup(setup)
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async def cleanup(self):
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await super().cleanup()
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await self._transport.cleanup()
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async def send_message(self, frame: TransportMessageFrame | TransportMessageUrgentFrame):
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if isinstance(frame, (LiveKitTransportMessageFrame, LiveKitTransportMessageUrgentFrame)):
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await self._client.send_data(frame.message.encode(), frame.participant_id)
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else:
|
||
await self._client.send_data(frame.message.encode())
|
||
|
||
async def write_audio_frame(self, frame: OutputAudioRawFrame):
|
||
livekit_audio = self._convert_pipecat_audio_to_livekit(frame.audio)
|
||
await self._client.publish_audio(livekit_audio)
|
||
|
||
def _convert_pipecat_audio_to_livekit(self, pipecat_audio: bytes) -> rtc.AudioFrame:
|
||
bytes_per_sample = 2 # Assuming 16-bit audio
|
||
total_samples = len(pipecat_audio) // bytes_per_sample
|
||
samples_per_channel = total_samples // self._params.audio_out_channels
|
||
|
||
return rtc.AudioFrame(
|
||
data=pipecat_audio,
|
||
sample_rate=self.sample_rate,
|
||
num_channels=self._params.audio_out_channels,
|
||
samples_per_channel=samples_per_channel,
|
||
)
|
||
|
||
|
||
class LiveKitTransport(BaseTransport):
|
||
def __init__(
|
||
self,
|
||
url: str,
|
||
token: str,
|
||
room_name: str,
|
||
params: Optional[LiveKitParams] = None,
|
||
input_name: Optional[str] = None,
|
||
output_name: Optional[str] = None,
|
||
):
|
||
super().__init__(input_name=input_name, output_name=output_name)
|
||
|
||
callbacks = LiveKitCallbacks(
|
||
on_connected=self._on_connected,
|
||
on_disconnected=self._on_disconnected,
|
||
on_participant_connected=self._on_participant_connected,
|
||
on_participant_disconnected=self._on_participant_disconnected,
|
||
on_audio_track_subscribed=self._on_audio_track_subscribed,
|
||
on_audio_track_unsubscribed=self._on_audio_track_unsubscribed,
|
||
on_data_received=self._on_data_received,
|
||
on_first_participant_joined=self._on_first_participant_joined,
|
||
)
|
||
self._params = params or LiveKitParams()
|
||
|
||
self._client = LiveKitTransportClient(
|
||
url, token, room_name, self._params, callbacks, self.name
|
||
)
|
||
self._input: Optional[LiveKitInputTransport] = None
|
||
self._output: Optional[LiveKitOutputTransport] = None
|
||
|
||
self._register_event_handler("on_connected")
|
||
self._register_event_handler("on_disconnected")
|
||
self._register_event_handler("on_participant_connected")
|
||
self._register_event_handler("on_participant_disconnected")
|
||
self._register_event_handler("on_audio_track_subscribed")
|
||
self._register_event_handler("on_audio_track_unsubscribed")
|
||
self._register_event_handler("on_data_received")
|
||
self._register_event_handler("on_first_participant_joined")
|
||
self._register_event_handler("on_participant_left")
|
||
self._register_event_handler("on_call_state_updated")
|
||
|
||
def input(self) -> LiveKitInputTransport:
|
||
if not self._input:
|
||
self._input = LiveKitInputTransport(
|
||
self, self._client, self._params, name=self._input_name
|
||
)
|
||
return self._input
|
||
|
||
def output(self) -> LiveKitOutputTransport:
|
||
if not self._output:
|
||
self._output = LiveKitOutputTransport(
|
||
self, self._client, self._params, name=self._output_name
|
||
)
|
||
return self._output
|
||
|
||
@property
|
||
def participant_id(self) -> str:
|
||
return self._client.participant_id
|
||
|
||
async def send_audio(self, frame: OutputAudioRawFrame):
|
||
if self._output:
|
||
await self._output.queue_frame(frame, FrameDirection.DOWNSTREAM)
|
||
|
||
def get_participants(self) -> List[str]:
|
||
return self._client.get_participants()
|
||
|
||
async def get_participant_metadata(self, participant_id: str) -> dict:
|
||
return await self._client.get_participant_metadata(participant_id)
|
||
|
||
async def set_metadata(self, metadata: str):
|
||
await self._client.set_participant_metadata(metadata)
|
||
|
||
async def mute_participant(self, participant_id: str):
|
||
await self._client.mute_participant(participant_id)
|
||
|
||
async def unmute_participant(self, participant_id: str):
|
||
await self._client.unmute_participant(participant_id)
|
||
|
||
async def _on_connected(self):
|
||
await self._call_event_handler("on_connected")
|
||
|
||
async def _on_disconnected(self):
|
||
await self._call_event_handler("on_disconnected")
|
||
|
||
async def _on_participant_connected(self, participant_id: str):
|
||
await self._call_event_handler("on_participant_connected", participant_id)
|
||
|
||
async def _on_participant_disconnected(self, participant_id: str):
|
||
await self._call_event_handler("on_participant_disconnected", participant_id)
|
||
await self._call_event_handler("on_participant_left", participant_id, "disconnected")
|
||
|
||
async def _on_audio_track_subscribed(self, participant_id: str):
|
||
await self._call_event_handler("on_audio_track_subscribed", participant_id)
|
||
participant = self._client.room.remote_participants.get(participant_id)
|
||
if participant:
|
||
for publication in participant.audio_tracks.values():
|
||
self._client._on_track_subscribed_wrapper(
|
||
publication.track, publication, participant
|
||
)
|
||
|
||
async def _on_audio_track_unsubscribed(self, participant_id: str):
|
||
await self._call_event_handler("on_audio_track_unsubscribed", participant_id)
|
||
|
||
async def _on_data_received(self, data: bytes, participant_id: str):
|
||
if self._input:
|
||
await self._input.push_app_message(data.decode(), participant_id)
|
||
await self._call_event_handler("on_data_received", data, participant_id)
|
||
|
||
async def send_message(self, message: str, participant_id: Optional[str] = None):
|
||
if self._output:
|
||
frame = LiveKitTransportMessageFrame(message=message, participant_id=participant_id)
|
||
await self._output.send_message(frame)
|
||
|
||
async def send_message_urgent(self, message: str, participant_id: Optional[str] = None):
|
||
if self._output:
|
||
frame = LiveKitTransportMessageUrgentFrame(
|
||
message=message, participant_id=participant_id
|
||
)
|
||
await self._output.send_message(frame)
|
||
|
||
async def on_room_event(self, event):
|
||
# Handle room events
|
||
pass
|
||
|
||
async def on_participant_event(self, event):
|
||
# Handle participant events
|
||
pass
|
||
|
||
async def on_track_event(self, event):
|
||
# Handle track events
|
||
pass
|
||
|
||
async def _on_call_state_updated(self, state: str):
|
||
await self._call_event_handler("on_call_state_updated", self, state)
|
||
|
||
async def _on_first_participant_joined(self, participant_id: str):
|
||
await self._call_event_handler("on_first_participant_joined", participant_id)
|