add LiveKit audio transport
This commit is contained in:
joachimchauvet
committed by
joachimchauvet
joachimchauvet
parent
c262b272fa
commit
a9390d96a1
556
src/pipecat/transports/services/livekit.py
Normal file
556
src/pipecat/transports/services/livekit.py
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@@ -0,0 +1,556 @@
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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
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import numpy as np
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from loguru import logger
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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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Frame,
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MetricsFrame,
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StartFrame,
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TransportMessageFrame,
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)
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from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
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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.vad.vad_analyzer import VADAnalyzer
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from pydantic import BaseModel
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from scipy import signal
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from tenacity import retry, stop_after_attempt, wait_exponential
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try:
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from livekit import rtc
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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: str | None = None
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class LiveKitParams(TransportParams):
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audio_out_sample_rate: int = 48000
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audio_out_channels: int = 1
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vad_enabled: bool = True
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vad_analyzer: VADAnalyzer | None = None
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audio_in_sample_rate: int = 16000
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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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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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loop: asyncio.AbstractEventLoop,
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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._loop = loop
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self._room = rtc.Room(loop=loop)
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self._participant_id: str = ""
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self._connected = False
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self._audio_source: rtc.AudioSource | None = None
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self._audio_track: rtc.LocalAudioTrack | None = None
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self._audio_tracks = {}
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self._audio_queue = asyncio.Queue()
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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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@property
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def participant_id(self) -> str:
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return self._participant_id
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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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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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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(self._params.audio_out_sample_rate, self._params.audio_out_channels)
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self._audio_track = rtc.LocalAudioTrack.create_audio_track("pipecat-audio", self._audio_source)
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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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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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if not self._connected:
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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: str | None = 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(data, reliable=True, destination_identities=[participant_id])
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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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asyncio.create_task(self._async_on_participant_connected(participant))
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def _on_participant_disconnected_wrapper(self, participant: rtc.RemoteParticipant):
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asyncio.create_task(self._async_on_participant_disconnected(participant))
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def _on_track_subscribed_wrapper(
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self, track: rtc.Track, publication: rtc.RemoteTrackPublication, participant: rtc.RemoteParticipant
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):
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asyncio.create_task(self._async_on_track_subscribed(track, publication, participant))
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def _on_track_unsubscribed_wrapper(
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self, track: rtc.Track, publication: rtc.RemoteTrackPublication, participant: rtc.RemoteParticipant
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):
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asyncio.create_task(self._async_on_track_unsubscribed(track, publication, participant))
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def _on_data_received_wrapper(self, data: rtc.DataPacket):
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asyncio.create_task(self._async_on_data_received(data))
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def _on_connected_wrapper(self):
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asyncio.create_task(self._async_on_connected())
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def _on_disconnected_wrapper(self):
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asyncio.create_task(self._async_on_disconnected())
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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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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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async def _async_on_track_subscribed(
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self, track: rtc.Track, publication: rtc.RemoteTrackPublication, 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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asyncio.create_task(self._process_audio_stream(audio_stream, participant.sid))
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async def _async_on_track_unsubscribed(
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self, track: rtc.Track, publication: rtc.RemoteTrackPublication, 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):
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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 _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 cleanup(self):
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await self.disconnect()
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async def get_next_audio_frame(self):
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frame, participant_id = await self._audio_queue.get()
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return frame, participant_id
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class LiveKitInputTransport(BaseInputTransport):
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def __init__(self, client: LiveKitTransportClient, params: LiveKitParams, **kwargs):
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super().__init__(params, **kwargs)
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self._client = client
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self._audio_in_task = None
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self._vad_analyzer: VADAnalyzer | None = params.vad_analyzer
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self._current_sample_rate: int = params.audio_in_sample_rate
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if params.vad_enabled and not params.vad_analyzer:
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self._vad_analyzer = VADAnalyzer(sample_rate=self._current_sample_rate, num_channels=self._params.audio_in_channels)
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async def start(self, frame: StartFrame):
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await super().start(frame)
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await self._client.connect()
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if self._params.audio_in_enabled or self._params.vad_enabled:
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self._audio_in_task = asyncio.create_task(self._audio_in_task_handler())
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logger.info("LiveKitInputTransport started")
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async def stop(self, frame: EndFrame):
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if self._audio_in_task:
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self._audio_in_task.cancel()
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try:
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await self._audio_in_task
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except asyncio.CancelledError:
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pass
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await super().stop(frame)
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await self._client.disconnect()
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logger.info("LiveKitInputTransport stopped")
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async def process_frame(self, frame: Frame, direction: FrameDirection):
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if isinstance(frame, EndFrame):
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await self.stop(frame)
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else:
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await super().process_frame(frame, direction)
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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 or self._params.vad_enabled):
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self._audio_in_task.cancel()
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await self._audio_in_task
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def vad_analyzer(self) -> VADAnalyzer | None:
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return self._vad_analyzer
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async def push_app_message(self, message: Any, sender: str):
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frame = LiveKitTransportMessageFrame(message=message, participant_id=sender)
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await self._internal_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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while True:
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try:
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audio_data = await self._client.get_next_audio_frame()
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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 = self._convert_livekit_audio_to_pipecat(audio_frame_event)
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await self.push_audio_frame(pipecat_audio_frame)
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await self._internal_push_frame(
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pipecat_audio_frame
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) # TODO: ensure audio frames are pushed with the default BaseInputTransport.push_audio_frame()
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except asyncio.CancelledError:
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logger.info("Audio input task cancelled")
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break
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except Exception as e:
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logger.error(f"Error in audio input task: {e}")
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def _convert_livekit_audio_to_pipecat(self, audio_frame_event: rtc.AudioFrameEvent) -> AudioRawFrame:
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audio_frame = audio_frame_event.frame
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audio_data = np.frombuffer(audio_frame.data, dtype=np.int16)
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original_sample_rate = audio_frame.sample_rate
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# Allow 8kHz and 16kHz, convert anything else to 16kHz
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if original_sample_rate not in [8000, 16000]:
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audio_data = self._resample_audio(audio_data, original_sample_rate, 16000)
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sample_rate = 16000
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else:
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sample_rate = original_sample_rate
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if sample_rate != self._current_sample_rate:
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self._current_sample_rate = sample_rate
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self._vad_analyzer = VADAnalyzer(sample_rate=self._current_sample_rate, num_channels=self._params.audio_in_channels)
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return AudioRawFrame(audio=audio_data.tobytes(), sample_rate=sample_rate, num_channels=audio_frame.num_channels)
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def _resample_audio(self, audio_data: np.ndarray, original_rate: int, target_rate: int) -> np.ndarray:
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num_samples = int(len(audio_data) * target_rate / original_rate)
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resampled_audio = signal.resample(audio_data, num_samples)
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return resampled_audio.astype(np.int16)
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class LiveKitOutputTransport(BaseOutputTransport):
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def __init__(self, client: LiveKitTransportClient, params: LiveKitParams, **kwargs):
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super().__init__(params, **kwargs)
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self._client = client
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async def start(self, frame: StartFrame):
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await super().start(frame)
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await self._client.connect()
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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 process_frame(self, frame: Frame, direction: FrameDirection):
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if isinstance(frame, EndFrame):
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await self.stop(frame)
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else:
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await super().process_frame(frame, direction)
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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 send_message(self, frame: TransportMessageFrame):
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if isinstance(frame, LiveKitTransportMessageFrame):
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await self._client.send_data(frame.message.encode(), frame.participant_id)
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else:
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await self._client.send_data(frame.message.encode())
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async def send_metrics(self, frame: MetricsFrame):
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metrics = {}
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if frame.ttfb:
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metrics["ttfb"] = frame.ttfb
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if frame.processing:
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metrics["processing"] = frame.processing
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if hasattr(frame, "tokens"):
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metrics["tokens"] = frame.tokens
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if hasattr(frame, "characters"):
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metrics["characters"] = frame.characters
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message = LiveKitTransportMessageFrame(message={"type": "pipecat-metrics", "metrics": metrics})
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await self._client.send_data(str(message.message).encode())
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async def write_raw_audio_frames(self, frames: bytes):
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livekit_audio = self._convert_pipecat_audio_to_livekit(frames)
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await self._client.publish_audio(livekit_audio)
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def _convert_pipecat_audio_to_livekit(self, pipecat_audio: bytes) -> rtc.AudioFrame:
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bytes_per_sample = 2 # Assuming 16-bit audio
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total_samples = len(pipecat_audio) // bytes_per_sample
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samples_per_channel = total_samples // self._params.audio_out_channels
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return rtc.AudioFrame(
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data=pipecat_audio,
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sample_rate=self._params.audio_out_sample_rate,
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num_channels=self._params.audio_out_channels,
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samples_per_channel=samples_per_channel,
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)
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class LiveKitTransport(BaseTransport):
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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 = LiveKitParams(),
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input_name: str | None = None,
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output_name: str | None = None,
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loop: asyncio.AbstractEventLoop | None = None,
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):
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super().__init__(input_name=input_name, output_name=output_name, loop=loop)
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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._client = LiveKitTransportClient(url, token, room_name, self._params, self._create_callbacks(), self._loop)
|
||||
self._input: LiveKitInputTransport | None = None
|
||||
self._output: LiveKitOutputTransport | None = 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 _create_callbacks(self) -> LiveKitCallbacks:
|
||||
return 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,
|
||||
)
|
||||
|
||||
def input(self) -> FrameProcessor:
|
||||
if not self._input:
|
||||
self._input = LiveKitInputTransport(self._client, self._params, name=self._input_name)
|
||||
return self._input
|
||||
|
||||
def output(self) -> FrameProcessor:
|
||||
if not self._output:
|
||||
self._output = LiveKitOutputTransport(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: AudioRawFrame):
|
||||
if self._output:
|
||||
await self._output.process_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")
|
||||
# Attempt to reconnect
|
||||
try:
|
||||
await self._client.connect()
|
||||
await self._call_event_handler("on_connected")
|
||||
except Exception as e:
|
||||
logger.error(f"Failed to reconnect: {e}")
|
||||
|
||||
async def _on_participant_connected(self, participant_id: str):
|
||||
await self._call_event_handler("on_participant_connected", participant_id)
|
||||
if len(self.get_participants()) == 1:
|
||||
await self._call_event_handler("on_first_participant_joined", 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")
|
||||
if self._input:
|
||||
await self._input.process_frame(EndFrame(), FrameDirection.DOWNSTREAM)
|
||||
if self._output:
|
||||
await self._output.process_frame(EndFrame(), FrameDirection.DOWNSTREAM)
|
||||
|
||||
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: str | None = None):
|
||||
if self._output:
|
||||
frame = LiveKitTransportMessageFrame(message=message, participant_id=participant_id)
|
||||
await self._output.send_message(frame)
|
||||
|
||||
async def cleanup(self):
|
||||
if self._input:
|
||||
await self._input.cleanup()
|
||||
if self._output:
|
||||
await self._output.cleanup()
|
||||
await self._client.disconnect()
|
||||
|
||||
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)
|
||||
Reference in New Issue
Block a user