Fix NPE in HLS deriveAudioFormat.

Issue:#5868
PiperOrigin-RevId: 247613811

RELEASENOTES.md

@@ -2,6 +2,8 @@
 
 
 ### dev-v2 (not yet released) ###
 ### dev-v2 (not yet released) ###
 
 
+* Fix NPE when using HLS chunkless preparation
+  ([#5868](https://github.com/google/ExoPlayer/issues/5868)).
 * Offline: Add option to remove all downloads.
 * Offline: Add option to remove all downloads.
 * Decoders:
 * Decoders:
   * Prefer codecs that advertise format support over ones that do not, even if
   * Prefer codecs that advertise format support over ones that do not, even if
@@ -11,7 +13,7 @@
 * Audio: fix an issue where not all audio was played out when the configuration
 * Audio: fix an issue where not all audio was played out when the configuration
   for the underlying track was changing (e.g., at some period transitions).
   for the underlying track was changing (e.g., at some period transitions).
 * UI: Change playback controls toggle from touch down to touch up events
 * UI: Change playback controls toggle from touch down to touch up events
-  ([#5784](https://github.com/google/ExoPlayer/issues/5784)).
+  ([#5784](https://github.com/google/ExoPlayer/issues/5784)). 
 
 
 ### 2.10.0 ###
 ### 2.10.0 ###
 
 

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsMediaPeriod.java

@@ -802,7 +802,7 @@ public final class HlsMediaPeriod implements MediaPeriod, HlsSampleStreamWrapper
       if (isPrimaryTrackInVariant) {
       if (isPrimaryTrackInVariant) {
         channelCount = variantFormat.channelCount;
         channelCount = variantFormat.channelCount;
         selectionFlags = variantFormat.selectionFlags;
         selectionFlags = variantFormat.selectionFlags;
-        roleFlags = mediaTagFormat.roleFlags;
+        roleFlags = variantFormat.roleFlags;
         language = variantFormat.language;
         language = variantFormat.language;
         label = variantFormat.label;
         label = variantFormat.label;
       }
       }