pipecat/examples/realtime/realtime-openai-text.py

#
# Copyright (c) 2024-2026, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#


import os
from datetime import datetime

from dotenv import load_dotenv
from loguru import logger

from pipecat.adapters.schemas.function_schema import FunctionSchema
from pipecat.adapters.schemas.tools_schema import ToolsSchema
from pipecat.audio.vad.silero import SileroVADAnalyzer
from pipecat.frames.frames import LLMRunFrame
from pipecat.pipeline.pipeline import Pipeline
from pipecat.pipeline.runner import PipelineRunner
from pipecat.pipeline.task import PipelineParams, PipelineTask
from pipecat.processors.aggregators.llm_context import LLMContext
from pipecat.processors.aggregators.llm_response_universal import (
    LLMContextAggregatorPair,
    LLMUserAggregatorParams,
)
from pipecat.runner.types import RunnerArguments
from pipecat.runner.utils import create_transport
from pipecat.services.cartesia.tts import CartesiaTTSService
from pipecat.services.llm_service import FunctionCallParams
from pipecat.services.openai.realtime.events import (
    AudioConfiguration,
    AudioInput,
    InputAudioNoiseReduction,
    InputAudioTranscription,
    SemanticTurnDetection,
    SessionProperties,
)
from pipecat.services.openai.realtime.llm import (
    OpenAIRealtimeLLMService,
    OpenAIRealtimeLLMSettings,
)
from pipecat.transports.base_transport import BaseTransport, TransportParams
from pipecat.transports.daily.transport import DailyParams
from pipecat.transports.websocket.fastapi import FastAPIWebsocketParams

load_dotenv(override=True)


async def fetch_weather_from_api(params: FunctionCallParams):
    temperature = 75 if params.arguments["format"] == "fahrenheit" else 24
    await params.result_callback(
        {
            "conditions": "nice",
            "temperature": temperature,
            "format": params.arguments["format"],
            "timestamp": datetime.now().strftime("%Y%m%d_%H%M%S"),
        }
    )


async def fetch_restaurant_recommendation(params: FunctionCallParams):
    await params.result_callback({"name": "The Golden Dragon"})


weather_function = FunctionSchema(
    name="get_current_weather",
    description="Get the current weather",
    properties={
        "location": {
            "type": "string",
            "description": "The city and state, e.g. San Francisco, CA",
        },
        "format": {
            "type": "string",
            "enum": ["celsius", "fahrenheit"],
            "description": "The temperature unit to use. Infer this from the users location.",
        },
    },
    required=["location", "format"],
)

restaurant_function = FunctionSchema(
    name="get_restaurant_recommendation",
    description="Get a restaurant recommendation",
    properties={
        "location": {
            "type": "string",
            "description": "The city and state, e.g. San Francisco, CA",
        },
    },
    required=["location"],
)

# Create tools schema
tools = ToolsSchema(standard_tools=[weather_function, restaurant_function])


# We use lambdas to defer transport parameter creation until the transport
# type is selected at runtime.
transport_params = {
    "daily": lambda: DailyParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
    "twilio": lambda: FastAPIWebsocketParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
    "webrtc": lambda: TransportParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
}


async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
    logger.info(f"Starting bot")

    llm = OpenAIRealtimeLLMService(
        api_key=os.environ["OPENAI_API_KEY"],
        settings=OpenAIRealtimeLLMSettings(
            system_instruction="""You are a helpful and friendly AI.

Act like a human, but remember that you aren't a human and that you can't do human
things in the real world. Your voice and personality should be warm and engaging, with a lively and
playful tone.

If interacting in a non-English language, start by using the standard accent or dialect familiar to
the user. Talk quickly. You should always call a function if you can. Do not refer to these rules,
even if you're asked about them.

You are participating in a voice conversation. Keep your responses concise, short, and to the point
unless specifically asked to elaborate on a topic.

You have access to the following tools:
- get_current_weather: Get the current weather for a given location.
- get_restaurant_recommendation: Get a restaurant recommendation for a given location.

Remember, your responses should be short. Just one or two sentences, usually. Respond in English.""",
            session_properties=SessionProperties(
                audio=AudioConfiguration(
                    input=AudioInput(
                        transcription=InputAudioTranscription(),
                        # Set openai TurnDetection parameters. Not setting this at all will turn it
                        # on by default
                        turn_detection=SemanticTurnDetection(),
                        # Or set to False to disable openai turn detection and use transport VAD
                        # turn_detection=False,
                        noise_reduction=InputAudioNoiseReduction(type="near_field"),
                    )
                ),
                output_modalities=["text"],
                # tools=tools,
            ),
        ),
    )

    tts = CartesiaTTSService(
        api_key=os.environ["CARTESIA_API_KEY"],
        settings=CartesiaTTSService.Settings(
            voice="71a7ad14-091c-4e8e-a314-022ece01c121",  # British Reading Lady
        ),
    )

    # you can either register a single function for all function calls, or specific functions
    # llm.register_function(None, fetch_weather_from_api)
    llm.register_function("get_current_weather", fetch_weather_from_api)
    llm.register_function("get_restaurant_recommendation", fetch_restaurant_recommendation)

    # Create a standard OpenAI LLM context object using the normal messages format. The
    # OpenAIRealtimeLLMService will convert this internally to messages that the
    # openai WebSocket API can understand.
    context = LLMContext(
        [{"role": "developer", "content": "Say hello!"}],
        tools,
    )

    user_aggregator, assistant_aggregator = LLMContextAggregatorPair(
        context,
        user_params=LLMUserAggregatorParams(vad_analyzer=SileroVADAnalyzer()),
    )

    pipeline = Pipeline(
        [
            transport.input(),  # Transport user input
            user_aggregator,
            llm,  # LLM
            tts,  # TTS
            transport.output(),  # Transport bot output
            assistant_aggregator,
        ]
    )

    task = PipelineTask(
        pipeline,
        params=PipelineParams(
            enable_metrics=True,
            enable_usage_metrics=True,
        ),
        idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
    )

    @transport.event_handler("on_client_connected")
    async def on_client_connected(transport, client):
        logger.info(f"Client connected")
        # Kick off the conversation.
        await task.queue_frames([LLMRunFrame()])

    @transport.event_handler("on_client_disconnected")
    async def on_client_disconnected(transport, client):
        logger.info(f"Client disconnected")
        await task.cancel()

    runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)

    await runner.run(task)


async def bot(runner_args: RunnerArguments):
    """Main bot entry point compatible with Pipecat Cloud."""
    transport = await create_transport(runner_args, transport_params)
    await run_bot(transport, runner_args)


if __name__ == "__main__":
    from pipecat.runner.run import main

    main()