Merge pull request google#8764 from uvjustin:dev-v2

PiperOrigin-RevId: 367994410

Author: marcbaechinger

RELEASENOTES.md

@@ -42,6 +42,8 @@
         codec input size
         ([#8705](https://github.com/google/ExoPlayer/issues/8705)).
 *   HLS:
+    *   Fix bug of ignoring `EXT-X-START` when setting the live target offset
+        ([#8764](https://github.com/google/ExoPlayer/pull/8764)).
     *   Fix incorrect application of byte ranges to `EXT-X-MAP` tags
         ([#8783](https://github.com/google/ExoPlayer/issues/8783)).
     *   Fix issue that could cause playback to become stuck if corresponding
@@ -105,8 +107,7 @@
 *   Update instructions and publishing configuration for releasing to Google's
     Maven repository instead of bintray/JCenter.
 *   FFmpeg extension: Fix playback failure when switching to TrueHD tracks
-    during playback
-    ([#8616](https://github.com/google/ExoPlayer/issues/8616)).
+    during playback ([#8616](https://github.com/google/ExoPlayer/issues/8616)).
 
 ### 2.13.2 (2021-02-25)
 

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

@@ -616,7 +616,9 @@ private static long getTargetLiveOffsetUs(HlsMediaPlaylist playlist, long liveEd
     HlsMediaPlaylist.ServerControl serverControl = playlist.serverControl;
     // Select part hold back only if the playlist has a part target duration.
     long offsetToEndOfPlaylistUs;
-    if (serverControl.partHoldBackUs != C.TIME_UNSET
+    if (playlist.startOffsetUs != C.TIME_UNSET) {
+      offsetToEndOfPlaylistUs = playlist.durationUs - playlist.startOffsetUs;
+    } else if (serverControl.partHoldBackUs != C.TIME_UNSET
         && playlist.partTargetDurationUs != C.TIME_UNSET) {
       offsetToEndOfPlaylistUs = serverControl.partHoldBackUs;
     } else if (serverControl.holdBackUs != C.TIME_UNSET) {

library/hls/src/test/java/com/google/android/exoplayer2/source/hls/HlsMediaSourceTest.java

@@ -292,6 +292,44 @@ public void loadPlaylist_holdBackInPlaylist_targetLiveOffsetFromHoldBack()
     assertThat(window.defaultPositionUs).isEqualTo(0);
   }
 
+  @Test
+  public void loadPlaylist_withPlaylistStartTime_targetLiveOffsetFromStartTime()
+      throws TimeoutException, ParserException {
+    String playlistUri = "fake://foo.bar/media0/playlist.m3u8";
+    // The playlist has a duration of 16 seconds, and part hold back, hold back and start time
+    // defined.
+    String playlist =
+        "#EXTM3U\n"
+            + "#EXT-X-PROGRAM-DATE-TIME:2020-01-01T00:00:00.0+00:00\n"
+            + "#EXT-X-TARGETDURATION:4\n"
+            + "#EXT-X-VERSION:3\n"
+            + "#EXT-X-START:TIME-OFFSET=-15"
+            + "#EXT-X-MEDIA-SEQUENCE:0\n"
+            + "#EXTINF:4.00000,\n"
+            + "fileSequence0.ts\n"
+            + "#EXTINF:4.00000,\n"
+            + "fileSequence1.ts\n"
+            + "#EXTINF:4.00000,\n"
+            + "fileSequence2.ts\n"
+            + "#EXTINF:4.00000,\n"
+            + "fileSequence3.ts\n"
+            + "#EXT-X-PART-INF:PART-TARGET=0.5\n"
+            + "#EXT-X-SERVER-CONTROL:HOLD-BACK=12,PART-HOLD-BACK=3";
+    // The playlist finishes 1 second before the current time.
+    SystemClock.setCurrentTimeMillis(Util.parseXsDateTime("2020-01-01T00:00:17.0+00:00"));
+    HlsMediaSource.Factory factory = createHlsMediaSourceFactory(playlistUri, playlist);
+    MediaItem mediaItem = MediaItem.fromUri(playlistUri);
+    HlsMediaSource mediaSource = factory.createMediaSource(mediaItem);
+
+    Timeline timeline = prepareAndWaitForTimeline(mediaSource);
+
+    Timeline.Window window = timeline.getWindow(0, new Timeline.Window());
+    // The target live offset is picked from start time and then expressed in relation to the live
+    // edge (+1 seconds).
+    assertThat(window.liveConfiguration.targetOffsetMs).isEqualTo(16000);
+    assertThat(window.defaultPositionUs).isEqualTo(0);
+  }
+
   @Test
   public void loadPlaylist_targetLiveOffsetInMediaItem_targetLiveOffsetPickedFromMediaItem()
       throws TimeoutException, ParserException {