From f52bb274b8b54df2404ab485c7d277150005b679 Mon Sep 17 00:00:00 2001
From: Googler <noreply@google.com>
Date: Wed, 16 Nov 2022 18:07:00 +0000
Subject: [PATCH] Fix NPE when listener is not set

PiperOrigin-RevId: 488970696
---
 .../google/android/exoplayer2/audio/DefaultAudioSink.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java b/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
index e979060bd5f..5b997fd7791 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java
@@ -890,9 +890,11 @@ public boolean handleBuffer(
                   getSubmittedFrames() - trimmingAudioProcessor.getTrimmedFrameCount());
       if (!startMediaTimeUsNeedsSync
           && Math.abs(expectedPresentationTimeUs - presentationTimeUs) > 200000) {
-        listener.onAudioSinkError(
-            new AudioSink.UnexpectedDiscontinuityException(
-                presentationTimeUs, expectedPresentationTimeUs));
+        if (listener != null) {
+          listener.onAudioSinkError(
+              new AudioSink.UnexpectedDiscontinuityException(
+                  presentationTimeUs, expectedPresentationTimeUs));
+        }
         startMediaTimeUsNeedsSync = true;
       }
       if (startMediaTimeUsNeedsSync) {