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feat: ASR自动字幕能力
48 lines
1.3 KiB
Python
Executable File
48 lines
1.3 KiB
Python
Executable File
"""ASR 服务工厂 — 根据环境配置创建对应 ASR 服务实例。
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支持的后端：
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- mock: MockASRService（测试/开发用）
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- 后续可扩展：whisper / aliyun / tencent 等
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"""
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from __future__ import annotations
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import os
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from functools import lru_cache
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from packages.ports.asr_service import ASRService
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@lru_cache(maxsize=1)
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def get_asr_service() -> ASRService | None:
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"""获取全局 ASR 服务实例（单例）。
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根据环境变量 ASR_PROVIDER 决定使用哪个后端：
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- mock / 空 / 未设置: 返回 None（不启用 ASR）
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- mock: 使用 MockASRService
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Returns:
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ASRService 实例，未配置或不启用时返回 None
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"""
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provider = os.environ.get("ASR_PROVIDER", "").lower().strip()
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if not provider:
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return None
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if provider == "mock":
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from packages.adapters.asr.mock_asr_service import MockASRService
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return MockASRService()
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# 未知 provider，记录日志并返回 None（不启用 ASR，不阻断主流程）
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import logging
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logger = logging.getLogger(__name__)
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logger.warning("未知的 ASR provider: %s，ASR 自动字幕功能未启用", provider)
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return None
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def reset_asr_service_cache() -> None:
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"""重置 ASR 服务缓存（测试用）。"""
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get_asr_service.cache_clear()
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