From c3d7eecd1f64ae6cdb120cb543d4994a10c2d02c Mon Sep 17 00:00:00 2001
From: eguven <eguven@google.com>
Date: Fri, 17 Feb 2017 07:57:49 -0800
Subject: [PATCH] Fix ChunkExtractorWrapper.init(TrackOutput) calls with null
 TrackOutput after extractor initialized

InitializationChunk calls init(null). When the initialization and index data is separate they need to
be loaded separately which results to two init(null) calls.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=147837985
---
 .../android/exoplayer2/source/chunk/ChunkExtractorWrapper.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkExtractorWrapper.java b/library/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkExtractorWrapper.java
index 489f63be2b..2a641b80a6 100644
--- a/library/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkExtractorWrapper.java
+++ b/library/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkExtractorWrapper.java
@@ -88,7 +88,7 @@ public final class ChunkExtractorWrapper implements ExtractorOutput, TrackOutput
       extractorInitialized = true;
     } else {
       extractor.seek(0, 0);
-      if (sampleFormat != null) {
+      if (sampleFormat != null && trackOutput != null) {
         trackOutput.format(sampleFormat);
       }
     }