From a9d91b3387262e7fd954db6346b44048616af76c Mon Sep 17 00:00:00 2001
From: Ian Bird <IanDBird@Gmail.com>
Date: Tue, 21 Nov 2017 10:59:04 +0000
Subject: [PATCH] Fix initializationData check for SSA subtitles

---
 .../java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java b/library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java
index d2f5a67c27..12aa1e97d5 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java
@@ -59,7 +59,7 @@ public final class SsaDecoder extends SimpleSubtitleDecoder {
    */
   public SsaDecoder(List<byte[]> initializationData) {
     super("SsaDecoder");
-    if (initializationData != null) {
+    if (initializationData != null && initializationData.size() > 0) {
       haveInitializationData = true;
       String formatLine = new String(initializationData.get(0));
       Assertions.checkArgument(formatLine.startsWith(FORMAT_LINE_PREFIX));