From fc3f0968880add4a9e38444adfa12fbe10c53e7b Mon Sep 17 00:00:00 2001
From: andrewlewis <andrewlewis@google.com>
Date: Mon, 9 Dec 2024 09:58:17 -0800
Subject: [PATCH] Fix handling of 'no chunk readers' in AVI

Before this change the chunk readers array was accessed out of bounds in files
for which no chunk readers are created.

PiperOrigin-RevId: 704323919
---
 .../java/androidx/media3/extractor/avi/AviExtractor.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libraries/extractor/src/main/java/androidx/media3/extractor/avi/AviExtractor.java b/libraries/extractor/src/main/java/androidx/media3/extractor/avi/AviExtractor.java
index baf0cece6b..6b2e8358a2 100644
--- a/libraries/extractor/src/main/java/androidx/media3/extractor/avi/AviExtractor.java
+++ b/libraries/extractor/src/main/java/androidx/media3/extractor/avi/AviExtractor.java
@@ -419,7 +419,11 @@ public final class AviExtractor implements Extractor {
       chunkReader.compactIndex();
     }
     seekMapHasBeenOutput = true;
-    extractorOutput.seekMap(new AviSeekMap(durationUs));
+    if (chunkReaders.length == 0) {
+      extractorOutput.seekMap(new SeekMap.Unseekable(durationUs));
+    } else {
+      extractorOutput.seekMap(new AviSeekMap(durationUs));
+    }
   }
 
   private long peekSeekOffset(ParsableByteArray idx1Body) {