refactor: Remove tedious singleton decorator

Author: Nativu5

configs/__init__.py

@@ -1 +1 @@
-from .config import singleton_variable, Config, CPUConfig
+from .config import Singleton, Config, CPUConfig

configs/config.py

@@ -22,18 +22,16 @@
 ]
 
 
-def singleton_variable(func):
-    def wrapper(*args, **kwargs):
-        if wrapper.instance is None:
-            wrapper.instance = func(*args, **kwargs)
-        return wrapper.instance
+class Singleton(type):
+    _instances = {}
 
-    wrapper.instance = None
-    return wrapper
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
+        return cls._instances[cls]
 
 
-@singleton_variable
-class Config:
+class Config(metaclass=Singleton):
     def __init__(self):
         self.device = "cuda:0"
         self.is_half = True
@@ -233,8 +231,7 @@ def device_config(self):
         return x_pad, x_query, x_center, x_max
 
 
-@singleton_variable
-class CPUConfig:
+class CPUConfig(metaclass=Singleton):
     def __init__(self):
         self.device = "cpu"
         self.is_half = False

i18n/i18n.py

@@ -1,7 +1,7 @@
 import json
 import locale
 import os
-from configs import singleton_variable
+from configs import Singleton
 
 
 def load_language_list(language):
@@ -10,8 +10,7 @@ def load_language_list(language):
     return language_list
 
 
-@singleton_variable
-class I18nAuto:
+class I18nAuto(metaclass=Singleton):
     def __init__(self, language=None):
         if language in ["Auto", None]:
             language = locale.getdefaultlocale(

infer/modules/vc/hash.py

@@ -2,10 +2,12 @@
 import torch
 import hashlib
 import pathlib
+
+from functools import lru_cache
 from scipy.fft import fft
 from pybase16384 import encode_to_string, decode_from_string
 
-from configs import CPUConfig, singleton_variable
+from configs import CPUConfig
 from rvc.synthesizer import get_synthesizer
 
 from .pipeline import Pipeline
@@ -29,27 +31,27 @@ def __exit__(self, type, value, traceback):
 expand_factor = 65536 * 8
 
 
-@singleton_variable
+@lru_cache(None)  # None 表示无限缓存
 def original_audio_storage():
     return np.load(pathlib.Path(__file__).parent / "lgdsng.npz")
 
 
-@singleton_variable
+@lru_cache(None)
 def original_audio():
     return original_audio_storage()["a"]
 
 
-@singleton_variable
+@lru_cache(None)
 def original_audio_time_minus():
     return original_audio_storage()["t"]
 
 
-@singleton_variable
+@lru_cache(None)
 def original_audio_freq_minus():
     return original_audio_storage()["f"]
 
 
-@singleton_variable
+@lru_cache(None)
 def original_rmvpe_f0():
     x = original_audio_storage()
     return x["pitch"], x["pitchf"]