From c283506c0937528249495478512db97e12c82809 Mon Sep 17 00:00:00 2001
From: tonihei <tonihei@google.com>
Date: Tue, 7 Mar 2023 15:05:20 +0000
Subject: [PATCH] Make DefaultDashChunkSource more robust against empty segment
 timelines

Segment timelines are technically allowed to be empty, but not all places
add the necessary checks.

Issue: google/ExoPlayer#11014
PiperOrigin-RevId: 514722205
(cherry picked from commit 0113174788eae17e47e70544d14fc97535d9558e)
---
 .../exoplayer2/source/dash/DefaultDashChunkSource.java     | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java
index 0bdc49d76d1..84860cb5253 100644
--- a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java
+++ b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java
@@ -234,9 +234,12 @@ public long getAdjustedSeekPositionUs(long positionUs, SeekParameters seekParame
     // Segments are aligned across representations, so any segment index will do.
     for (RepresentationHolder representationHolder : representationHolders) {
       if (representationHolder.segmentIndex != null) {
+        long segmentCount = representationHolder.getSegmentCount();
+        if (segmentCount == 0) {
+          continue;
+        }
         long segmentNum = representationHolder.getSegmentNum(positionUs);
         long firstSyncUs = representationHolder.getSegmentStartTimeUs(segmentNum);
-        long segmentCount = representationHolder.getSegmentCount();
         long secondSyncUs =
             firstSyncUs < positionUs
                     && (segmentCount == DashSegmentIndex.INDEX_UNBOUNDED
@@ -592,7 +595,7 @@ private ArrayList<Representation> getRepresentations() {
   }
 
   private long getAvailableLiveDurationUs(long nowUnixTimeUs, long playbackPositionUs) {
-    if (!manifest.dynamic) {
+    if (!manifest.dynamic || representationHolders[0].getSegmentCount() == 0) {
       return C.TIME_UNSET;
     }
     long lastSegmentNum = representationHolders[0].getLastAvailableSegmentNum(nowUnixTimeUs);