From fdfb7b395a5d59d8386fdb60a8b067925ee102e6 Mon Sep 17 00:00:00 2001
From: lukasIO <mail@lukasseiler.de>
Date: Mon, 6 May 2024 09:47:19 +0200
Subject: [PATCH] Add timestamp to exp timeSyncUpdate (#1126)

* Add timestamp to exp timeSyncUpdate

* Create loud-fireants-hammer.md
---
 .changeset/loud-fireants-hammer.md |  5 +++++
 src/room/track/RemoteTrack.ts      | 11 +++++++----
 src/room/track/Track.ts            |  2 +-
 3 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/loud-fireants-hammer.md

diff --git a/.changeset/loud-fireants-hammer.md b/.changeset/loud-fireants-hammer.md
new file mode 100644
index 000000000..f5bebb59f
--- /dev/null
+++ b/.changeset/loud-fireants-hammer.md
@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+Add timestamp to exp timeSyncUpdate
diff --git a/src/room/track/RemoteTrack.ts b/src/room/track/RemoteTrack.ts
index c5720148f..d307e6850 100644
--- a/src/room/track/RemoteTrack.ts
+++ b/src/room/track/RemoteTrack.ts
@@ -85,10 +85,13 @@ export default abstract class RemoteTrack<
   registerTimeSyncUpdate() {
     const loop = () => {
       this.timeSyncHandle = requestAnimationFrame(() => loop());
-      const newTime = this.receiver?.getSynchronizationSources()[0]?.rtpTimestamp;
-      if (newTime && this.rtpTimestamp !== newTime) {
-        this.emit(TrackEvent.TimeSyncUpdate, newTime);
-        this.rtpTimestamp = newTime;
+      const sources = this.receiver?.getSynchronizationSources()[0];
+      if (sources) {
+        const { timestamp, rtpTimestamp } = sources;
+        if (rtpTimestamp && this.rtpTimestamp !== rtpTimestamp) {
+          this.emit(TrackEvent.TimeSyncUpdate, { timestamp, rtpTimestamp });
+          this.rtpTimestamp = rtpTimestamp;
+        }
       }
     };
     loop();
diff --git a/src/room/track/Track.ts b/src/room/track/Track.ts
index 62ff9782b..881ac9faf 100644
--- a/src/room/track/Track.ts
+++ b/src/room/track/Track.ts
@@ -525,5 +525,5 @@ export type TrackEventCallbacks = {
   upstreamResumed: (track: any) => void;
   trackProcessorUpdate: (processor?: TrackProcessor<Track.Kind, any>) => void;
   audioTrackFeatureUpdate: (track: any, feature: AudioTrackFeature, enabled: boolean) => void;
-  timeSyncUpdate: (timestamp: number) => void;
+  timeSyncUpdate: (update: { timestamp: number; rtpTimestamp: number }) => void;
 };