feat(transcriber): 添加 Bcut 和 Kuaishou 转录器实现，优化转录服务提供器

backend/app/transcriber/transcriber_provider.py

@@ -1,19 +1,74 @@
 from app.transcriber.whisper import WhisperTranscriber
+from app.transcriber.bcut import BcutTranscriber
+from app.transcriber.kuaishou import KuaishouTranscriber
 from app.utils.logger import get_logger
 logger = get_logger(__name__)
 
-logger.info('实例化transcriber')
-# TODO:后面需要加入逻辑选择
-_transcriber = None
+logger.info('初始化转录服务提供器')
 
-def get_transcriber(model_size="base", device="cuda"):
-    global _transcriber
+# 维护各种转录器的单例实例
+_transcribers = {
+    'whisper': None,
+    'bcut': None,
+    'kuaishou': None
+}
 
-    if _transcriber is None:
-        logger.info('不存在 transcriber ，开始实例化transcriber。')
+def get_whisper_transcriber(model_size="base", device="cuda"):
+    """获取 Whisper 转录器实例"""
+    if _transcribers['whisper'] is None:
+        logger.info(f'创建 Whisper 转录器实例，参数：{model_size}, {device}')
         try:
-            _transcriber = WhisperTranscriber(model_size=model_size, device=device)
-            logger.info(f'实例化transcriber成功。参数：{model_size}, {device} ')
+            _transcribers['whisper'] = WhisperTranscriber(model_size=model_size, device=device)
+            logger.info('Whisper 转录器创建成功')
         except Exception as e:
-            logger.error(f"实例化transcriber失败，请检查是否安装whisper。{e}")
-    return _transcriber
+            logger.error(f"Whisper 转录器创建失败: {e}")
+            raise
+    return _transcribers['whisper']
+
+def get_bcut_transcriber():
+    """获取 Bcut 转录器实例"""
+    if _transcribers['bcut'] is None:
+        logger.info('创建 Bcut 转录器实例')
+        try:
+            _transcribers['bcut'] = BcutTranscriber()
+            logger.info('Bcut 转录器创建成功')
+        except Exception as e:
+            logger.error(f"Bcut 转录器创建失败: {e}")
+            raise
+    return _transcribers['bcut']
+
+def get_kuaishou_transcriber():
+    """获取快手转录器实例"""
+    if _transcribers['kuaishou'] is None:
+        logger.info('创建快手转录器实例')
+        try:
+            _transcribers['kuaishou'] = KuaishouTranscriber()
+            logger.info('快手转录器创建成功')
+        except Exception as e:
+            logger.error(f"快手转录器创建失败: {e}")
+            raise
+    return _transcribers['kuaishou']
+
+def get_transcriber(transcriber_type="whisper", model_size="base", device="cuda"):
+    """
+    获取指定类型的转录器实例
+    
+    参数:
+        transcriber_type: 转录器类型，支持 "whisper", "bcut", "kuaishou"
+        model_size: 模型大小，whisper 特有参数
+        device: 设备类型，whisper 特有参数
+    
+    返回:
+        对应类型的转录器实例
+    """
+    logger.info(f'获取转录器，类型: {transcriber_type}')
+    
+    if transcriber_type == "whisper":
+        return get_whisper_transcriber(model_size, device)
+    elif transcriber_type == "bcut":
+        return get_bcut_transcriber()
+    elif transcriber_type == "kuaishou":
+        return get_kuaishou_transcriber()
+    else:
+        logger.warning(f'未知转录器类型 "{transcriber_type}"，使用默认 whisper')
+        return get_whisper_transcriber(model_size, device)