app/main.py

from fastapi import FastAPI, Response
import asyncio
import hashlib
import os
from tts_with_rvc import TTS_RVC


app = FastAPI()
CACHE_DIR = "cache"
os.makedirs(CACHE_DIR, exist_ok=True)


@app.get("/")
def read_root():
    return {"message": "Hello from FastAPI on Hugging Face Spaces 🚀"}


@app.get("/speak")
async def speak(text: str):
    text_hash = hashlib.sha256(text.encode("utf-8")).hexdigest()
    cache_path = os.path.join(CACHE_DIR, f"{text_hash}.wav")

    if os.path.exists(cache_path):
        with open(cache_path, "rb") as f:
            return Response(content=f.read(), media_type="audio/wav")
    
    tts = TTS_RVC(
        model_path="app/models/chu2.pth",
        voice="ja-JP-NanamiNeural",
        device="cpu",
        index_path="app/models/chu2.index",
        f0_method="pm"
    )

    path = tts(
        text=text,
        pitch=6,
        tts_rate=30
    )

    os.rename(path, cache_path)

    with open(cache_path, "rb") as f:
        audio_bytes = f.read()

    return Response(content=audio_bytes, media_type="audio/wav")