wip - pcc-transport example
This commit is contained in:
Chad Bailey
316
examples/pcc-transport/server/bot.py
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316
examples/pcc-transport/server/bot.py
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#
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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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"""OpenAI Bot Implementation.
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This module implements a chatbot using OpenAI's GPT-4 model for natural language
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processing. It includes:
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- Real-time audio/video interaction through Daily
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- Animated robot avatar
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- Text-to-speech using ElevenLabs
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- Support for both English and Spanish
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The bot runs as part of a pipeline that processes audio/video frames and manages
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the conversation flow.
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"""
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import os
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import aiohttp
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from dotenv import load_dotenv
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from loguru import logger
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from PIL import Image
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from pipecatcloud.agent import DailySessionArguments
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from pipecatcloud.agent import SessionArguments as PCCSessionArguments
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from pipecat.adapters.schemas.function_schema import FunctionSchema
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from pipecat.adapters.schemas.tools_schema import ToolsSchema
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from pipecat.audio.vad.silero import SileroVADAnalyzer
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from pipecat.frames.frames import (
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BotStartedSpeakingFrame,
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BotStoppedSpeakingFrame,
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Frame,
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OutputImageRawFrame,
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SpriteFrame,
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TTSSpeakFrame,
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)
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from pipecat.pipeline.pipeline import Pipeline
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from pipecat.pipeline.runner import PipelineRunner
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from pipecat.pipeline.task import PipelineParams, PipelineTask
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from pipecat.processors.aggregators.openai_llm_context import OpenAILLMContext
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from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
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from pipecat.processors.frameworks.rtvi import RTVIConfig, RTVIObserver, RTVIProcessor
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from pipecat.services.cartesia import CartesiaTTSService
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from pipecat.services.gladia import GladiaSTTService
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from pipecat.services.openai import OpenAILLMService
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from pipecat.transports.services.daily import DailyParams, DailyTransport
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from pipecat.transports.services.pipecat_cloud import (
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PipecatCloudParams,
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PipecatCloudTransport,
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SessionArguments,
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)
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load_dotenv(override=True)
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# Check if we're in local development mode
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LOCAL_RUN = os.getenv("LOCAL_RUN")
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if LOCAL_RUN:
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import asyncio
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import webbrowser
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try:
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from local_runner import configure
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except ImportError:
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logger.error("Could not import local_runner module. Local development mode may not work.")
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# Logger for local dev
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# logger.add(sys.stderr, level="DEBUG")
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sprites = []
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script_dir = os.path.dirname(__file__)
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# Load sequential animation frames
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for i in range(1, 26):
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# Build the full path to the image file
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full_path = os.path.join(script_dir, f"assets/robot0{i}.png")
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# Get the filename without the extension to use as the dictionary key
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# Open the image and convert it to bytes
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with Image.open(full_path) as img:
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sprites.append(OutputImageRawFrame(image=img.tobytes(), size=img.size, format=img.format))
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# Create a smooth animation by adding reversed frames
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flipped = sprites[::-1]
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sprites.extend(flipped)
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# Define static and animated states
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quiet_frame = sprites[0] # Static frame for when bot is listening
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talking_frame = SpriteFrame(images=sprites) # Animation sequence for when bot is talking
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class TalkingAnimation(FrameProcessor):
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"""Manages the bot's visual animation states.
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Switches between static (listening) and animated (talking) states based on
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the bot's current speaking status.
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"""
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def __init__(self):
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super().__init__()
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self._is_talking = False
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async def process_frame(self, frame: Frame, direction: FrameDirection):
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"""Process incoming frames and update animation state.
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Args:
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frame: The incoming frame to process
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direction: The direction of frame flow in the pipeline
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"""
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await super().process_frame(frame, direction)
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# Switch to talking animation when bot starts speaking
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if isinstance(frame, BotStartedSpeakingFrame):
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if not self._is_talking:
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await self.push_frame(talking_frame)
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self._is_talking = True
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# Return to static frame when bot stops speaking
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elif isinstance(frame, BotStoppedSpeakingFrame):
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await self.push_frame(quiet_frame)
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self._is_talking = False
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await self.push_frame(frame, direction)
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async def fetch_weather_from_api(function_name, tool_call_id, args, llm, context, result_callback):
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"""Fetch weather data dummy function.
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This function simulates fetching weather data from an external API.
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It demonstrates how to call an external service from the language model.
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"""
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await llm.push_frame(TTSSpeakFrame("Let me check on that."))
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await result_callback({"conditions": "nice", "temperature": "75"})
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async def main(session_args: SessionArguments):
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"""Main bot execution function.
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Sets up and runs the bot pipeline including:
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- Daily video transport
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- Speech-to-text and text-to-speech services
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- Language model integration
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- Animation processing
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- RTVI event handling
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"""
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logger.info(f"session args: {session_args}")
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# Set up Daily transport with video/audio parameters
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transport = PipecatCloudTransport(
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session_args=session_args,
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params=PipecatCloudParams(
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audio_out_enabled=True, # Enable output audio for the bot
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camera_out_enabled=True, # Enable the camera output for the bot
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camera_out_width=1024, # Set the camera output width
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camera_out_height=576, # Set the camera output height
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transcription_enabled=True, # Enable transcription for the user
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vad_enabled=True, # Enable VAD to handle user speech
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vad_analyzer=SileroVADAnalyzer(), # Use the Silero VAD analyzer
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vad_audio_passthrough=True, # Pass audio through VAD for user speech to the rest of the pipeline
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),
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)
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# Initialize text-to-speech service
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tts = CartesiaTTSService(
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api_key=os.getenv("CARTESIA_API_KEY"),
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voice_id="c45bc5ec-dc68-4feb-8829-6e6b2748095d", # Movieman
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)
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stt = GladiaSTTService(api_key=os.getenv("GLADIA_API_KEY"))
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# Initialize LLM service
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llm = OpenAILLMService(api_key=os.getenv("OPENAI_API_KEY"), model="gpt-4o")
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# Register your function call providing the function name and callback
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llm.register_function("get_current_weather", fetch_weather_from_api)
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# Define your function call using the FunctionSchema
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# Learn more about function calling in Pipecat:
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# https://docs.pipecat.ai/guides/features/function-calling
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weather_function = FunctionSchema(
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name="get_current_weather",
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description="Get the current weather",
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properties={
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"location": {
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"type": "string",
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"description": "The city and state, e.g. San Francisco, CA",
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},
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"format": {
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"type": "string",
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"enum": ["celsius", "fahrenheit"],
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"description": "The temperature unit to use. Infer this from the user's location.",
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},
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},
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required=["location", "format"],
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)
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# Set up the tools schema with your weather function call
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tools = ToolsSchema(standard_tools=[weather_function])
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# Set up initial messages for the bot
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messages = [
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{
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"role": "system",
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"content": "You are Chatbot, a friendly, helpful robot. Your goal is to demonstrate your capabilities in a succinct way. Your output will be converted to audio so don't include special characters in your answers. Respond to what the user said in a creative and helpful way, but keep your responses brief. Start by introducing yourself.",
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},
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]
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# Set up conversation context and management
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# The context_aggregator will automatically collect conversation context
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# Pass your initial messages and tools to the context to initialize the context
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context = OpenAILLMContext(messages, tools)
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context_aggregator = llm.create_context_aggregator(context)
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ta = TalkingAnimation()
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# RTVI events for Pipecat client UI
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rtvi = RTVIProcessor(config=RTVIConfig(config=[]))
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# Add your processors to the pipeline
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pipeline = Pipeline(
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[
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transport.input(),
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stt,
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rtvi,
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context_aggregator.user(),
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llm,
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tts,
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ta,
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transport.output(),
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context_aggregator.assistant(),
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]
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)
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# Create a PipelineTask to manage the pipeline
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task = PipelineTask(
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pipeline,
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params=PipelineParams(
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allow_interruptions=True,
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enable_metrics=True,
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enable_usage_metrics=True,
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),
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observers=[RTVIObserver(rtvi)],
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)
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@rtvi.event_handler("on_client_ready")
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async def on_client_ready(rtvi):
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# Notify the client that the bot is ready
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await rtvi.set_bot_ready()
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@transport.event_handler("on_client_connected")
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async def on_client_connected(transport, participant):
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# Push a static frame to show the bot is listening
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await task.queue_frame(quiet_frame)
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# Capture the first participant's transcription
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# await transport.capture_participant_transcription(participant["id"])
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# Kick off the conversation by pushing a context frame to the pipeline
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await task.queue_frames([context_aggregator.user().get_context_frame()])
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@transport.event_handler("on_client_disconnected")
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async def on_client_disconnected(transport, participant):
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logger.debug(f"Participant left: {participant}")
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# Cancel the PipelineTask to stop processing
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await task.cancel()
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runner = PipelineRunner()
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await runner.run(task)
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async def bot(args: DailySessionArguments):
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"""Main bot entry point compatible with Pipecat Cloud.
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Args:
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room_url: The Daily room URL
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token: The Daily room token
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body: The configuration object from the request body
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session_id: The session ID for logging
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"""
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logger.info(f"Bot process initialized {args.room_url} {args.token}")
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try:
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await main(args)
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logger.info("Bot process completed")
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except Exception as e:
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logger.exception(f"Error in bot process: {str(e)}")
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raise
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# Local development
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async def local_daily():
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# TODO-CB: This becomes SmallWebRTCTransport
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"""Function for local development testing."""
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try:
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async with aiohttp.ClientSession() as session:
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(room_url, token) = await configure(session)
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logger.warning("_")
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logger.warning("_")
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logger.warning(f"Talk to your voice agent here: {room_url}")
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logger.warning("_")
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logger.warning("_")
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webbrowser.open(room_url)
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await main(room_url, token, config={})
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except Exception as e:
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logger.exception(f"Error in local development mode: {e}")
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async def local_webrtc(webrtc_connection):
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await main(SessionArguments(webrtc_connection=webrtc_connection))
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# Local development entry point
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if LOCAL_RUN and __name__ == "__main__":
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try:
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asyncio.run(local_daily())
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except Exception as e:
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logger.exception(f"Failed to run in local mode: {e}")
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