app.py

import logging
import os
import time
import uuid
import gradio as gr
import soundfile as sf
from model import get_pretrained_model, language_to_models

title = "# Next-gen Kaldi: Text-to-speech (TTS)"

description = """
This space shows how to convert text to speech with Next-gen Kaldi.
It is running on CPU within a docker container provided by Hugging Face.
See more information by visiting the following links:
- <https://github.com/k2-fsa/sherpa-onnx>
If you want to deploy it locally, please see <https://k2-fsa.github.io/sherpa/>
If you want to use Android APKs, please see <https://k2-fsa.github.io/sherpa/onnx/tts/apk.html>
If you want to use Android text-to-speech engine APKs, please see <https://k2-fsa.github.io/sherpa/onnx/tts/apk-engine.html>
If you want to download an all-in-one exe for Windows, please see <https://github.com/k2-fsa/sherpa-onnx/releases/tag/tts-models>
"""

css = """.result {display:flex;flex-direction:column}.result_item {padding:15px;margin-bottom:8px;border-radius:15px;width:100%}.result_item_success {background-color:mediumaquamarine;color:white;align-self:start}.result_item_error {background-color:#ff7070;color:white;align-self:start}"""

examples = [["Portuguese", "csukuangfj/vits-mms-por", "Eu desejo uma versão simplificada para português.", 0, 1.0]]

language_choices = ["Portuguese"]

def update_model_dropdown(language):
    return gr.Dropdown(choices=language_to_models.get(language, []), value=language_to_models.get(language, [""])[0], interactive=True)

def build_html_output(s, style="result_item_success"):
    return f"""<div class='result'><div class='result_item {style}'>{s}</div></div>"""

def process(language, repo_id, text, sid, speed):
    logging.info(f"Input text: {text}. sid: {sid}, speed: {speed}")
    sid = int(sid)
    tts = get_pretrained_model(repo_id, speed)
    start = time.time()
    audio = tts.generate(text, sid=sid)
    end = time.time()
    if len(audio.samples) == 0:
        raise ValueError("Error in generating audios. Please read previous error messages.")
    duration = len(audio.samples) / audio.sample_rate
    elapsed_seconds = end - start
    rtf = elapsed_seconds / duration
    info = f"""Wave duration  : {duration:.3f} s <br/>Processing time: {elapsed_seconds:.3f} s <br/>RTF: {elapsed_seconds:.3f}/{duration:.3f} = {rtf:.3f} <br/>"""
    logging.info(info)
    logging.info(f"\nrepo_id: {repo_id}\ntext: {text}\nsid: {sid}\nspeed: {speed}")
    filename = str(uuid.uuid4()) + ".wav"
    sf.write(filename, audio.samples, samplerate=audio.sample_rate, subtype="PCM_16")
    return filename, build_html_output(info)

demo = gr.Blocks(css=css)

with demo:
    gr.Markdown(title)
    language_radio = gr.Radio(label="Language", choices=language_choices, value=language_choices[0])
    model_dropdown = gr.Dropdown(choices=language_to_models["Portuguese"], label="Select a model", value=language_to_models["Portuguese"][0])
    language_radio.change(update_model_dropdown, inputs=language_radio, outputs=model_dropdown)

    with gr.Tabs():
        with gr.TabItem("Please input your text"):
            input_text = gr.Textbox(label="Input text", info="Your text", lines=3, placeholder="Please input your text here")
            input_sid = gr.Textbox(label="Speaker ID", info="Speaker ID", lines=1, max_lines=1, value="0", placeholder="Speaker ID. Valid only for mult-speaker model")
            input_speed = gr.Slider(minimum=0.1, maximum=10, value=1, step=0.1, label="Speed (larger->faster; smaller->slower)")
            input_button = gr.Button("Submit")
            output_audio = gr.Audio(label="Output")
            output_info = gr.HTML(label="Info")
            gr.Examples(examples=examples, fn=process, inputs=[language_radio, model_dropdown, input_text, input_sid, input_speed], outputs=[output_audio, output_info])

        input_button.click(process, inputs=[language_radio, model_dropdown, input_text, input_sid, input_speed], outputs=[output_audio, output_info])

    gr.Markdown(description)

def download_espeak_ng_data():
    os.system("""cd /tmp; wget -qq https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/espeak-ng-data.tar.bz2; tar xf espeak-ng-data.tar.bz2""")

if __name__ == "__main__":
    download_espeak_ng_data()
    formatter = "%(asctime)s %(levelname)s [%(filename)s:%(lineno)d] %(message)s"
    logging.basicConfig(format=formatter, level=logging.INFO)
    demo.launch()