feat: add rtc.AudioResampler using soxr (#264)

Author: theomonnom

livekit-rtc/livekit/rtc/__init__.py

@@ -69,6 +69,7 @@
 )
 from .video_source import VideoSource
 from .video_stream import VideoFrameEvent, VideoStream
+from .audio_resampler import AudioResampler, AudioResamplerQuality
 
 __all__ = [
     "ConnectionQuality",
@@ -127,5 +128,7 @@
     "VideoStream",
     "ChatManager",
     "ChatMessage",
+    "AudioResampler",
+    "AudioResamplerQuality",
     "__version__",
 ]

livekit-rtc/livekit/rtc/_ffi_client.py

@@ -192,10 +192,10 @@ class FfiClient:
     _instance: Optional["FfiClient"] = None
 
     @classproperty
-    def instance(self):
-        if self._instance is None:
-            self._instance = FfiClient()
-        return self._instance
+    def instance(cls) -> "FfiClient":
+        if cls._instance is None:
+            cls._instance = FfiClient()
+        return cls._instance
 
     def __init__(self) -> None:
         self._lock = threading.RLock()