From a5a4d3e47c14f2b52c3d43dd21640a5992d20641 Mon Sep 17 00:00:00 2001
From: Ashwin Bhat <me@ashwinbhat.com>
Date: Fri, 10 Mar 2023 21:31:18 -0800
Subject: [PATCH] fix(HLS): preserve discontinuitySequence in SegmentIndex#fit
 (#5066)

The `discontinuitySequence` field of the last `SegmentReference` was getting reset to `0` in this function, even if it was originally set to something other than 0. This was causing unnecessary resyncs for the final segment of the video in sequence mode.
---
 lib/media/segment_index.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/media/segment_index.js b/lib/media/segment_index.js
index bad96a0343..544d9bd7b9 100644
--- a/lib/media/segment_index.js
+++ b/lib/media/segment_index.js
@@ -363,6 +363,8 @@ shaka.media.SegmentIndex = class {
             lastReference.status,
             lastReference.hlsAes128Key,
         );
+    this.references[this.references.length - 1].discontinuitySequence =
+        lastReference.discontinuitySequence;
   }