add example script to list audio devices

Author: chenosaurus

examples/local_audio/list_devices.py

@@ -0,0 +1,43 @@
+from livekit.rtc import MediaDevices
+
+
+def main():
+    # Create a MediaDevices instance
+    devices = MediaDevices()
+
+    # Get default devices
+    default_input_idx = devices.default_input_device()
+    default_output_idx = devices.default_output_device()
+
+    # List input devices
+    print("=== Input Devices ===")
+    input_devices = devices.list_input_devices()
+    if not input_devices:
+        print("No input devices found")
+    else:
+        for dev in input_devices:
+            default_marker = " (default)" if dev["index"] == default_input_idx else ""
+            print(
+                f"  [{dev['index']}] {dev['name']}{default_marker} - "
+                f"{dev['max_input_channels']} channels @ {dev['default_samplerate']} Hz"
+            )
+
+    print()
+
+    # List output devices
+    print("=== Output Devices ===")
+    output_devices = devices.list_output_devices()
+    if not output_devices:
+        print("No output devices found")
+    else:
+        for dev in output_devices:
+            default_marker = " (default)" if dev["index"] == default_output_idx else ""
+            print(
+                f"  [{dev['index']}] {dev['name']}{default_marker} - "
+                f"{dev['max_output_channels']} channels @ {dev['default_samplerate']} Hz"
+            )
+
+
+if __name__ == "__main__":
+    main()
+