fixes silence detected but never reported by silero

pyproject.toml

@@ -61,10 +61,10 @@ packages = [
     "whisperlivekit.whisper.normalizers",
     "whisperlivekit.web",
     "whisperlivekit.local_agreement",
-    "whisperlivekit.vad_models"
+    "whisperlivekit.silero_vad_models"
 ]
 
 [tool.setuptools.package-data]
 whisperlivekit = ["web/*.html", "web/*.css", "web/*.js", "web/src/*.svg"]
 "whisperlivekit.whisper.assets" = ["*.tiktoken", "*.npz"]
-"whisperlivekit.vad_models" = ["*.jit", "*.onnx"]
+"whisperlivekit.silero_vad_models" = ["*.jit", "*.onnx"]

whisperlivekit/audio_processor.py

@@ -603,16 +603,16 @@ class AudioProcessor:
             res = self.vac(pcm_array)
 
         if res is not None:
-            silence_detected = res.get("end", 0) > res.get("start", 0)
-            if silence_detected and not self.current_silence:
+            if "start" in res and self.current_silence:
+                await self._end_silence()
+            
+            if "end" in res and not self.current_silence:
                 pre_silence_chunk = self._slice_before_silence(
                     pcm_array, chunk_sample_start, res.get("end")
                 )
                 if pre_silence_chunk is not None and pre_silence_chunk.size > 0:
                     await self._enqueue_active_audio(pre_silence_chunk)
                 await self._begin_silence()
-            elif self.current_silence:
-                await self._end_silence()
 
         if not self.current_silence:
             await self._enqueue_active_audio(pcm_array)

whisperlivekit/silero_vad_iterator.py

@@ -123,7 +123,7 @@ def load_silero_vad(model_path: str = None, onnx: bool = False, opset_version: i
         raise Exception(f'Available ONNX opset_version: {available_ops}')
     if model_path is None:
         current_dir = Path(__file__).parent
-        data_dir = current_dir / 'vad_models'
+        data_dir = current_dir / 'silero_vad_models'
         
         if onnx:
             if opset_version == 16:
@@ -138,7 +138,7 @@ def load_silero_vad(model_path: str = None, onnx: bool = False, opset_version: i
         if not model_path.exists():
             raise FileNotFoundError(
                 f"Model file not found: {model_path}\n"
-                f"Please ensure the whisperlivekit/vad_models/ directory contains the model files."
+                f"Please ensure the whisperlivekit/silero_vad_models/ directory contains the model files."
             )
     else:
         model_path = Path(model_path)
@@ -276,8 +276,10 @@ class FixedVADIterator(VADIterator):
             elif r is not None:
                 if "end" in r:
                     ret["end"] = r["end"]
-                if "start" in r and "end" in ret:
-                    del ret["end"]
+                if "start" in r:
+                    ret["start"] = r["start"]
+                    if "end" in ret:
+                        del ret["end"]
         return ret if ret != {} else None