add close method to AudioSource and VideoSource

ensures we can clean up allocated resources correctly

examples/publish-wav/index.ts

@@ -63,6 +63,10 @@ while (written < dataSize) {
   written += frameSize;
 }
 await source.waitForPlayout();
+// release resources allocated for audio publishing
+source.close();
 
 await room.disconnect();
+
+// disposes all resources, only use if no more sessions are expected
 await dispose();

packages/livekit-rtc/src/audio_source.ts

@@ -134,4 +134,8 @@ export class AudioSource {
       throw new Error(cb.error);
     }
   }
+
+  close() {
+    this.ffiHandle.dispose();
+  }
 }

packages/livekit-rtc/src/video_source.ts

@@ -64,4 +64,8 @@ export class VideoSource {
       message: { case: 'captureVideoFrame', value: req },
     });
   }
+
+  close() {
+    this.ffiHandle.dispose();
+  }
 }