app.py

import time
import os
import numpy as np
import gradio as gr
import random

from fastrtc import AdditionalOutputs, WebRTC, ReplyOnPause, get_cloudflare_turn_credentials_async, get_cloudflare_turn_credentials

HF_TOKEN = os.getenv("HF_TOKEN")
async def get_credentials():
    return await get_cloudflare_turn_credentials_async(hf_token=HF_TOKEN)

possible_responses = [
    "hello",
    "hi",
    "how's it going?",
    "what's up?",
    "how's your day?",
    "how are you?",
    "what's your name?",
    "where are you from?",
    "what do you do?",
    "what's your favorite color?",
    "what's your favorite food?",
    "what's your favorite movie?",
]


def transcribe(audio: tuple[int, np.ndarray]):
    time.sleep(1)
    transformers_convo = [
        {"role": "assistant", "content": random.choice(possible_responses)}
    ]
    yield AdditionalOutputs(transformers_convo)


with gr.Blocks() as demo:
    gr.HTML(
        """
    TEST
    """
    )

    test_state = gr.State()
    with gr.Row():
        with gr.Column():
            audio = WebRTC(
                label="Stream",
                mode="send-receive",
                modality="audio",
                rtc_configuration=get_credentials,
                server_rtc_configuration=get_cloudflare_turn_credentials(ttl=360_000),
            )
        with gr.Column():
            transcript = gr.Chatbot(label="transcript", type="messages")

    audio.stream(
        ReplyOnPause(transcribe), inputs=[audio], outputs=[audio], time_limit=180
    )
    def handle_additional_outputs(outputs):
        print(f"outputs: {outputs}")
        return outputs
            
    audio.on_additional_outputs(
            fn=handle_additional_outputs,
            outputs=[test_state],
            concurrency_limit=10,
            queue=True, #False,
            show_progress="hidden",
    )

    gr.on(test_state.change, inputs=[test_state, transcript], outputs=[transcript])
    def state_change(test_state)
        return test_state + [{"role": "assistant", "content": random.choice(possible_responses)}]
        
    demo.launch(server_name="0.0.0.0", server_port=7860, share=True)