From bdd593e0d3c794ce5806f00d6b3dfbbecfd3ed3c Mon Sep 17 00:00:00 2001
From: kimvde <kimvde@google.com>
Date: Fri, 23 Jun 2023 14:15:35 +0000
Subject: [PATCH] Make FallbackListener.onTransformationRequestFinalized()
 synchronized

FallbackListener.onTransformationRequestFinalized() is called from the
AssetLoader thread for audio, and from the GL thread for video.

PiperOrigin-RevId: 542851284
---
 .../java/androidx/media3/transformer/FallbackListener.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/FallbackListener.java b/libraries/transformer/src/main/java/androidx/media3/transformer/FallbackListener.java
index 32efa07200..a917f547ea 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/FallbackListener.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/FallbackListener.java
@@ -89,7 +89,8 @@ import java.util.concurrent.atomic.AtomicInteger;
    * @throws IllegalStateException If called for more tracks than declared in {@link
    *     #setTrackCount(int)}.
    */
-  public void onTransformationRequestFinalized(TransformationRequest transformationRequest) {
+  public synchronized void onTransformationRequestFinalized(
+      TransformationRequest transformationRequest) {
     checkState(trackCount.getAndDecrement() > 0);
 
     TransformationRequest.Builder fallbackRequestBuilder =