Fixes for new react-native-webrtc (#478)

* Fixes for new react-native-webrtc

* Add changeset

* formatting

.changeset/fresh-ears-report.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Fixes for latest transceiver APIs in react-native-webrtc

src/room/RTCEngine.ts

@@ -36,13 +36,7 @@ import type LocalVideoTrack from './track/LocalVideoTrack';
 import type { SimulcastTrackInfo } from './track/LocalVideoTrack';
 import type { TrackPublishOptions, VideoCodec } from './track/options';
 import { Track } from './track/Track';
-import {
-  isWeb,
-  sleep,
-  supportsAddTrack,
-  supportsSetCodecPreferences,
-  supportsTransceiver,
-} from './utils';
+import { sleep, supportsAddTrack, supportsSetCodecPreferences, supportsTransceiver } from './utils';
 
 const lossyDataChannel = '_lossy';
 const reliableDataChannel = '_reliable';
@@ -352,18 +346,9 @@ export default class RTCEngine extends (EventEmitter as new () => TypedEventEmit
       }
     };
 
-    if (isWeb()) {
-      this.subscriber.pc.ontrack = (ev: RTCTrackEvent) => {
-        this.emit(EngineEvent.MediaTrackAdded, ev.track, ev.streams[0], ev.receiver);
-      };
-    } else {
-      // TODO: react-native-webrtc doesn't have ontrack yet, replace when ready.
-      // @ts-ignore
-      this.subscriber.pc.onaddstream = (ev: { stream: MediaStream }) => {
-        const track = ev.stream.getTracks()[0];
-        this.emit(EngineEvent.MediaTrackAdded, track, ev.stream);
-      };
-    }
+    this.subscriber.pc.ontrack = (ev: RTCTrackEvent) => {
+      this.emit(EngineEvent.MediaTrackAdded, ev.track, ev.streams[0], ev.receiver);
+    };
 
     this.createDataChannels();
 

src/room/track/RemoteAudioTrack.ts

@@ -220,7 +220,7 @@ export default class RemoteAudioTrack extends RemoteTrack {
   };
 
   protected async getReceiverStats(): Promise<AudioReceiverStats | undefined> {
-    if (!this.receiver) {
+    if (!this.receiver || !this.receiver.getStats) {
       return;
     }
 

src/room/track/RemoteVideoTrack.ts

@@ -163,7 +163,7 @@ export default class RemoteVideoTrack extends RemoteTrack {
   };
 
   private async getReceiverStats(): Promise<VideoReceiverStats | undefined> {
-    if (!this.receiver) {
+    if (!this.receiver || !this.receiver.getStats) {
       return;
     }