PCM音频模式

main/xiaozhi-server/core/providers/asr/base.py

@@ -1,6 +1,6 @@
 from abc import ABC, abstractmethod
 from typing import Optional, Tuple, List
-
+import opuslib_next
 from config.logger import setup_logging
 
 TAG = __name__
@@ -17,3 +17,23 @@ class ASRProviderBase(ABC):
     async def speech_to_text(self, opus_data: List[bytes], session_id: str) -> Tuple[Optional[str], Optional[str]]:
         """将语音数据转换为文本"""
         pass
+    
+    def set_audio_format(self, format: str) -> None:
+        """设置音频格式"""
+        self.audio_format = format
+
+    @staticmethod
+    def decode_opus(opus_data: List[bytes]) -> bytes:
+        """将Opus音频数据解码为PCM数据"""
+
+        decoder = opuslib_next.Decoder(16000, 1)  # 16kHz, 单声道
+        pcm_data = []
+
+        for opus_packet in opus_data:
+            try:
+                pcm_frame = decoder.decode(opus_packet, 960)  # 960 samples = 60ms
+                pcm_data.append(pcm_frame)
+            except opuslib_next.OpusError as e:
+                logger.bind(tag=TAG).error(f"Opus解码错误: {e}", exc_info=True)
+
+        return pcm_data