Update stt/stt_google.py

stt/stt_google.py

@@ -65,6 +65,20 @@ class GoogleCloudSTT(STTInterface):
         self.total_audio_bytes = 0
         self.total_chunks = 0
 
+    def _get_encoding(self, encoding_str: str):
+        """Convert encoding string to Google Speech enum"""
+        if not GOOGLE_SPEECH_AVAILABLE:
+            return None
+    
+        encoding_map = {
+            "WEBM_OPUS": speech.RecognitionConfig.AudioEncoding.WEBM_OPUS,
+            "LINEAR16": speech.RecognitionConfig.AudioEncoding.LINEAR16,
+            "FLAC": speech.RecognitionConfig.AudioEncoding.FLAC,
+            "MP3": speech.RecognitionConfig.AudioEncoding.MP3,
+            "OGG_OPUS": speech.RecognitionConfig.AudioEncoding.OGG_OPUS,
+        }
+        return encoding_map.get(encoding_str, speech.RecognitionConfig.AudioEncoding.WEBM_OPUS)
+    
     async def stream_audio(self, audio_chunk: bytes) -> AsyncIterator[TranscriptionResult]:
         """Stream audio chunk and get transcription results"""
         if not self.is_streaming: