From 4112a99f49fd0cef76ada2dcd31489a22ca9a0ba Mon Sep 17 00:00:00 2001
From: tonihei <tonihei@google.com>
Date: Thu, 3 Feb 2022 10:09:42 +0000
Subject: [PATCH] Ignore format changes arriving after the media has been
 removed.

PiperOrigin-RevId: 426089165
---
 .../android/exoplayer2/analytics/MediaMetricsListener.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/analytics/MediaMetricsListener.java b/library/core/src/main/java/com/google/android/exoplayer2/analytics/MediaMetricsListener.java
index cc4780b0de..29ea1322bd 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/analytics/MediaMetricsListener.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/analytics/MediaMetricsListener.java
@@ -237,6 +237,11 @@ public final class MediaMetricsListener
 
   @Override
   public void onDownstreamFormatChanged(EventTime eventTime, MediaLoadData mediaLoadData) {
+    if (eventTime.mediaPeriodId == null) {
+      // This event arrived after the media has been removed from the playlist or a custom
+      // MediaSource forgot to set the right id. Ignore the track change in these cases.
+      return;
+    }
     PendingFormatUpdate update =
         new PendingFormatUpdate(
             checkNotNull(mediaLoadData.trackFormat),