app.py

import os
import torch
import time
import uuid
import gradio as gr
from openvoice import se_extractor
from openvoice.api import ToneColorConverter

# Set writable cache directory for torch
os.environ["TORCH_HOME"] = "/tmp/torch"
os.makedirs("/tmp/torch", exist_ok=True)

# Environment fixes for HF Spaces
os.environ["HF_HOME"] = "/tmp/huggingface"
os.environ["HF_HUB_CACHE"] = "/tmp/huggingface"
os.environ["TRANSFORMERS_CACHE"] = "/tmp/huggingface"
os.environ["MPLCONFIGDIR"] = "/tmp"
os.environ["XDG_CACHE_HOME"] = "/tmp"
os.environ["XDG_CONFIG_HOME"] = "/tmp"
os.environ["NUMBA_DISABLE_CACHE"] = "1"
os.makedirs("/tmp/huggingface", exist_ok=True)
os.makedirs("/tmp/flagged", exist_ok=True)

# Set model paths
ckpt_converter = "checkpoints/converter/config.json"
output_dir = "/tmp/outputs"
os.makedirs(output_dir, exist_ok=True)

# Initialize OpenVoice converter
tone_color_converter = ToneColorConverter(ckpt_converter)

# Speaker embedding cache
ref_speaker_embed = None

def clone_and_speak(text, speaker_wav):
    if not speaker_wav:
        return "Please upload a reference .wav file."

    # Generate a unique filename
    timestamp = str(int(time.time()))
    base_name = f"output_{timestamp}_{uuid.uuid4().hex[:6]}"
    output_wav = os.path.join(output_dir, f"{base_name}.wav")

    # Extract style from uploaded speaker voice
    global ref_speaker_embed
    ref_speaker_embed = se_extractor.get_se(speaker_wav, tone_color_converter, vad=False)

    # Generate speech using base model
    tone_color_converter.convert(
        text=text,
        speaker_id="openvoice",
        language="en",
        ref_speaker=speaker_wav,
        ref_embed=ref_speaker_embed,
        output_path=output_wav,
        top_k=10,
        temperature=0.3
    )

    return output_wav

# Gradio interface (exposed as global `demo` for HF Spaces)
gr.Interface(
    fn=clone_and_speak,
    inputs=[
        gr.Textbox(label="Enter Text"),
        gr.Audio(type="filepath", label="Upload a Reference Voice (.wav)")
    ],
    outputs=gr.Audio(label="Synthesized Output"),
    flagging_dir="/tmp/flagged",  # safe temporary dir
    title="Text to Voice using OpenVoice",
    description="Clone any voice (English) and generate speech using OpenVoice on CPU.",
).launch()