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65 lines
2 KiB
Python
65 lines
2 KiB
Python
"""Twilio transport factory."""
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from fastapi import WebSocket
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from api.services.pipecat.audio_config import AudioConfig
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from api.services.pipecat.audio_mixer import build_audio_out_mixer
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from api.services.telephony.factory import load_credentials_for_transport
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from pipecat.transports.websocket.fastapi import (
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FastAPIWebsocketParams,
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FastAPIWebsocketTransport,
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)
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from .serializers import TwilioFrameSerializer
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from .strategies import TwilioConferenceStrategy, TwilioHangupStrategy
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async def create_transport(
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websocket: WebSocket,
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workflow_run_id: int,
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audio_config: AudioConfig,
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organization_id: int,
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*,
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vad_config: dict | None = None,
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ambient_noise_config: dict | None = None,
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telephony_configuration_id: int | None = None,
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stream_sid: str,
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call_sid: str,
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):
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"""Create a transport for Twilio connections."""
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config = await load_credentials_for_transport(
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organization_id, telephony_configuration_id, expected_provider="twilio"
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)
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account_sid = config.get("account_sid")
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auth_token = config.get("auth_token")
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if not account_sid or not auth_token:
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raise ValueError(
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f"Incomplete Twilio configuration for organization {organization_id}"
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)
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serializer = TwilioFrameSerializer(
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stream_sid=stream_sid,
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call_sid=call_sid,
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account_sid=account_sid,
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auth_token=auth_token,
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transfer_strategy=TwilioConferenceStrategy(),
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hangup_strategy=TwilioHangupStrategy(),
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)
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mixer = await build_audio_out_mixer(
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audio_config.transport_out_sample_rate, ambient_noise_config
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)
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return FastAPIWebsocketTransport(
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websocket=websocket,
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params=FastAPIWebsocketParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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audio_in_sample_rate=audio_config.transport_in_sample_rate,
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audio_out_sample_rate=audio_config.transport_out_sample_rate,
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audio_out_mixer=mixer,
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serializer=serializer,
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),
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)
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