From 4bc392a8efbd688c5a8d98769aa4116cfc398c12 Mon Sep 17 00:00:00 2001
From: xufuji456 <xufuji456@gmail.com>
Date: Thu, 29 Oct 2020 15:12:49 +0800
Subject: [PATCH] fix the end point of span exceeds the length of
 SpannableStringBuilder

---
 .../com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/core/src/main/java/com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java b/library/core/src/main/java/com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java
index 4ce0ea8df5..9c03127803 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java
@@ -185,6 +185,9 @@ public final class Tx3gDecoder extends SimpleSubtitleDecoder {
     int fontFace = parsableByteArray.readUnsignedByte();
     parsableByteArray.skipBytes(1); // font size
     int colorRgba = parsableByteArray.readInt();
+    if (end > cueText.length()) {
+      end = cueText.length();
+    }
     attachFontFace(cueText, fontFace, defaultFontFace, start, end, SPAN_PRIORITY_HIGH);
     attachColor(cueText, colorRgba, defaultColorRgba, start, end, SPAN_PRIORITY_HIGH);
   }