example for streaming audio for Gradio

test_stream_out.py

import gradio as gr
import numpy as np
import wave

def response():
    def streaming():
        f = wave.open("sound.wav", 'rb')
        buffer = f.readframes(f.getnframes())
        data = np.frombuffer(buffer, dtype=f'int{f.getsampwidth()*8}')
        chunks = []
        for idx in range(0,data.shape[0],20000):
            chunks.append( data[idx:idx+20000] )
        return chunks
    chunks = streaming()
    for i, chunk in enumerate(chunks):
        if i == 0:
            assert chunk.shape[-1] > 5000
        # print("stream chunk:",i, chunk.shape)

        wav = chunk.astype(np.float)
        wav_norm = wav * float(32767 / max(0.01, np.max(np.abs(wav))))
        wav_norm = wav_norm.astype(np.int16)
        yield (44000, wav_norm)

with gr.Blocks() as demo:
    audio_out = gr.Audio(autoplay=True,
                         show_download_button=False,
                         show_share_button=False,
                         editable=False,
                         interactive=False,
                         streaming=True,
                         label="Stream audio out")
    button = gr.Button("Test streaming audio out")
    button.click(response, [], audio_out) \

demo.launch(share=True)