Expose RTPReceiver for getting track statistics. (#162)

lib/src/core/room.dart

@@ -289,6 +289,7 @@ class Room extends DisposableChangeNotifier with EventsEmittable<RoomEvent> {
           event.track,
           event.stream,
           trackSid,
+          receiver: event.receiver,
         );
       } on TrackSubscriptionExceptionEvent catch (event) {
         logger.severe('addSubscribedMediaTrack() throwed ${event}');

lib/src/participant/remote.dart

@@ -74,8 +74,9 @@ class RemoteParticipant extends Participant<RemoteTrackPublication> {
   Future<void> addSubscribedMediaTrack(
     rtc.MediaStreamTrack mediaTrack,
     rtc.MediaStream stream,
-    String trackSid,
+    String trackSid, {
-  ) async {
+    rtc.RTCRtpReceiver? receiver,
+  }) async {
     logger.fine('addSubscribedMediaTrack()');
 
     // If publication doesn't exist yet...
@@ -112,10 +113,12 @@ class RemoteParticipant extends Participant<RemoteTrackPublication> {
     final RemoteTrack track;
     if (pub.kind == lk_models.TrackType.VIDEO) {
       // video track
-      track = RemoteVideoTrack(pub.name, pub.source, stream, mediaTrack);
+      track = RemoteVideoTrack(pub.name, pub.source, stream, mediaTrack,
+          receiver: receiver);
     } else if (pub.kind == lk_models.TrackType.AUDIO) {
       // audio track
-      track = RemoteAudioTrack(pub.name, pub.source, stream, mediaTrack);
+      track = RemoteAudioTrack(pub.name, pub.source, stream, mediaTrack,
+          receiver: receiver);
     } else {
       throw UnexpectedStateException('Unknown track type');
     }

lib/src/track/remote/audio.dart

@@ -12,17 +12,16 @@ import '../web/_audio_api.dart' if (dart.library.html) '../web/_audio_html.dart'
 class RemoteAudioTrack extends RemoteTrack
     with AudioTrack, RemoteAudioManagementMixin {
   //
-  RemoteAudioTrack(
+  RemoteAudioTrack(String name, TrackSource source, rtc.MediaStream stream,
-    String name,
+      rtc.MediaStreamTrack track,
-    TrackSource source,
+      {rtc.RTCRtpReceiver? receiver})
-    rtc.MediaStream stream,
+      : super(
-    rtc.MediaStreamTrack track,
-  ) : super(
           name,
           lk_models.TrackType.AUDIO,
           source,
           stream,
           track,
+          receiver: receiver,
         );
 
   @override

lib/src/track/remote/remote.dart

@@ -5,18 +5,16 @@ import '../../types/other.dart';
 import '../track.dart';
 
 abstract class RemoteTrack extends Track {
-  RemoteTrack(
+  RemoteTrack(String name, lk_models.TrackType kind, TrackSource source,
-    String name,
+      rtc.MediaStream stream, rtc.MediaStreamTrack track,
-    lk_models.TrackType kind,
+      {rtc.RTCRtpReceiver? receiver})
-    TrackSource source,
+      : super(
-    rtc.MediaStream stream,
-    rtc.MediaStreamTrack track,
-  ) : super(
           name,
           kind,
           source,
           stream,
           track,
+          receiver: receiver,
         );
 
   @override

lib/src/track/remote/video.dart

@@ -7,16 +7,15 @@ import 'remote.dart';
 
 class RemoteVideoTrack extends RemoteTrack with VideoTrack {
   //
-  RemoteVideoTrack(
+  RemoteVideoTrack(String name, TrackSource source, rtc.MediaStream stream,
-    String name,
+      rtc.MediaStreamTrack track,
-    TrackSource source,
+      {rtc.RTCRtpReceiver? receiver})
-    rtc.MediaStream stream,
+      : super(
-    rtc.MediaStreamTrack track,
-  ) : super(
           name,
           lk_models.TrackType.VIDEO,
           source,
           stream,
           track,
+          receiver: receiver,
         );
 }

lib/src/track/track.dart

@@ -45,13 +45,11 @@ abstract class Track extends DisposableChangeNotifier
 
   rtc.RTCRtpSender? get sender => transceiver?.sender;
 
-  Track(
+  rtc.RTCRtpReceiver? receiver;
-    this.name,
+
-    this.kind,
+  Track(this.name, this.kind, this.source, this._mediaStream,
-    this.source,
+      this._mediaStreamTrack,
-    this._mediaStream,
+      {this.receiver}) {
-    this._mediaStreamTrack,
-  ) {
     // Any event emitted will trigger ChangeNotifier
     events.listen((event) {
       logger.fine('[TrackEvent] $event, will notifyListeners()');