model_singleton.py

import whisper
import torch

class WhisperModelSingleton:
    _instance = None
    _model = None
    
    @staticmethod
    def get_instance(model_name="whisper-large-v3"):
        if WhisperModelSingleton._instance is None:
            WhisperModelSingleton._instance = WhisperModelSingleton()
            device = "cuda" if torch.cuda.is_available() else "cpu"
            WhisperModelSingleton._model = whisper.load_model(model_name, device=device)
        return WhisperModelSingleton._model