Add Timeline.Window.isLive

This flag is currently merged into Window.isDynamic, which isn't always true
because
1. A window can be dynamic for other reasons (e.g. when the duration is still
missing).
2. A live stream can be become non-dynamic when it ends.

Issue:#2668
Issue:#5973
PiperOrigin-RevId: 271999378

RELEASENOTES.md

@@ -80,6 +80,9 @@
     and move it to the core library.
   * Move `LibvpxVideoRenderer.MSG_SET_OUTPUT_BUFFER_RENDERER` to
     `C.MSG_SET_OUTPUT_BUFFER_RENDERER`.
+* Add `Timeline.Window.isLive` to indicate that a window is a live stream
+  ([#2668](https://github.com/google/ExoPlayer/issues/2668) and
+  [#5973](https://github.com/google/ExoPlayer/issues/5973)).
 
 ### 2.10.5 (2019-09-20) ###
 

extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastTimeline.java

@@ -121,6 +121,7 @@ import java.util.Arrays;
         /* windowStartTimeMs= */ C.TIME_UNSET,
         /* isSeekable= */ !isDynamic,
         isDynamic,
+        /* isLive= */ isDynamic,
         defaultPositionsUs[windowIndex],
         durationUs,
         /* firstPeriodIndex= */ windowIndex,

extensions/ima/src/test/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoaderTest.java

@@ -63,7 +63,8 @@ public class ImaAdsLoaderTest {
 
   private static final long CONTENT_DURATION_US = 10 * C.MICROS_PER_SECOND;
   private static final Timeline CONTENT_TIMELINE =
-      new SinglePeriodTimeline(CONTENT_DURATION_US, /* isSeekable= */ true, /* isDynamic= */ false);
+      new SinglePeriodTimeline(
+          CONTENT_DURATION_US, /* isSeekable= */ true, /* isDynamic= */ false, /* isLive= */ false);
   private static final Uri TEST_URI = Uri.EMPTY;
   private static final long TEST_AD_DURATION_US = 5 * C.MICROS_PER_SECOND;
   private static final long[][] PREROLL_ADS_DURATIONS_US = new long[][] {{TEST_AD_DURATION_US}};

library/core/src/main/java/com/google/android/exoplayer2/Timeline.java

@@ -66,8 +66,9 @@ import com.google.android.exoplayer2.util.Assertions;
  * duration is unknown, since it's continually extending as more content is broadcast. If content
  * only remains available for a limited period of time then the window may start at a non-zero
  * position, defining the region of content that can still be played. The window will have {@link
- * Window#isDynamic} set to true if the stream is still live. Its default position is typically near
+ * Window#isLive} set to true to indicate it's a live stream and {@link Window#isDynamic} set to
- * to the live edge (indicated by the black dot in the figure above).
+ * true as long as we expect changes to the live window. Its default position is typically near to
+ * the live edge (indicated by the black dot in the figure above).
  *
  * <h3>Live stream with indefinite availability</h3>
  *
@@ -158,8 +159,13 @@ public abstract class Timeline {
     public boolean isDynamic;
 
     /**
-     * The index of the first period that belongs to this window.
+     * Whether the media in this window is live. For informational purposes only.
+     *
+     * <p>Check {@link #isDynamic} to know whether this window may still change.
      */
+    public boolean isLive;
+
+    /** The index of the first period that belongs to this window. */
     public int firstPeriodIndex;
 
     /**
@@ -200,6 +206,7 @@ public abstract class Timeline {
         long windowStartTimeMs,
         boolean isSeekable,
         boolean isDynamic,
+        boolean isLive,
         long defaultPositionUs,
         long durationUs,
         int firstPeriodIndex,
@@ -212,6 +219,7 @@ public abstract class Timeline {
       this.windowStartTimeMs = windowStartTimeMs;
       this.isSeekable = isSeekable;
       this.isDynamic = isDynamic;
+      this.isLive = isLive;
       this.defaultPositionUs = defaultPositionUs;
       this.durationUs = durationUs;
       this.firstPeriodIndex = firstPeriodIndex;

library/core/src/main/java/com/google/android/exoplayer2/source/MaskingMediaSource.java

@@ -317,6 +317,7 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
           /* isSeekable= */ false,
           // Dynamic window to indicate pending timeline updates.
           /* isDynamic= */ true,
+          /* isLive= */ false,
           /* defaultPositionUs= */ 0,
           /* durationUs= */ C.TIME_UNSET,
           /* firstPeriodIndex= */ 0,

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaPeriod.java

@@ -74,13 +74,14 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
   interface Listener {
 
     /**
-     * Called when the duration or ability to seek within the period changes.
+     * Called when the duration, the ability to seek within the period, or the categorization as
+     * live stream changes.
      *
      * @param durationUs The duration of the period, or {@link C#TIME_UNSET}.
      * @param isSeekable Whether the period is seekable.
+     * @param isLive Whether the period is live.
      */
-    void onSourceInfoRefreshed(long durationUs, boolean isSeekable);
+    void onSourceInfoRefreshed(long durationUs, boolean isSeekable, boolean isLive);
-
   }
 
   /**
@@ -129,6 +130,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
   private int enabledTrackCount;
   private long durationUs;
   private long length;
+  private boolean isLive;
 
   private long lastSeekPositionUs;
   private long pendingResetPositionUs;
@@ -551,7 +553,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
       long largestQueuedTimestampUs = getLargestQueuedTimestampUs();
       durationUs = largestQueuedTimestampUs == Long.MIN_VALUE ? 0
           : largestQueuedTimestampUs + DEFAULT_LAST_SAMPLE_DURATION_US;
-      listener.onSourceInfoRefreshed(durationUs, isSeekable);
+      listener.onSourceInfoRefreshed(durationUs, isSeekable, isLive);
     }
     eventDispatcher.loadCompleted(
         loadable.dataSpec,
@@ -740,14 +742,12 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
       }
       trackArray[i] = new TrackGroup(trackFormat);
     }
-    dataType =
+    isLive = length == C.LENGTH_UNSET && seekMap.getDurationUs() == C.TIME_UNSET;
-        length == C.LENGTH_UNSET && seekMap.getDurationUs() == C.TIME_UNSET
+    dataType = isLive ? C.DATA_TYPE_MEDIA_PROGRESSIVE_LIVE : C.DATA_TYPE_MEDIA;
-            ? C.DATA_TYPE_MEDIA_PROGRESSIVE_LIVE
-            : C.DATA_TYPE_MEDIA;
     preparedState =
         new PreparedState(seekMap, new TrackGroupArray(trackArray), trackIsAudioVideoFlags);
     prepared = true;
-    listener.onSourceInfoRefreshed(durationUs, seekMap.isSeekable());
+    listener.onSourceInfoRefreshed(durationUs, seekMap.isSeekable(), isLive);
     Assertions.checkNotNull(callback).onPrepared(this);
   }
 

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaSource.java

@@ -220,6 +220,7 @@ public final class ProgressiveMediaSource extends BaseMediaSource
 
   private long timelineDurationUs;
   private boolean timelineIsSeekable;
+  private boolean timelineIsLive;
   @Nullable private TransferListener transferListener;
 
   // TODO: Make private when ExtractorMediaSource is deleted.
@@ -253,7 +254,7 @@ public final class ProgressiveMediaSource extends BaseMediaSource
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     transferListener = mediaTransferListener;
     drmSessionManager.prepare();
-    notifySourceInfoRefreshed(timelineDurationUs, timelineIsSeekable);
+    notifySourceInfoRefreshed(timelineDurationUs, timelineIsSeekable, timelineIsLive);
   }
 
   @Override
@@ -293,27 +294,32 @@ public final class ProgressiveMediaSource extends BaseMediaSource
   // ProgressiveMediaPeriod.Listener implementation.
 
   @Override
-  public void onSourceInfoRefreshed(long durationUs, boolean isSeekable) {
+  public void onSourceInfoRefreshed(long durationUs, boolean isSeekable, boolean isLive) {
     // If we already have the duration from a previous source info refresh, use it.
     durationUs = durationUs == C.TIME_UNSET ? timelineDurationUs : durationUs;
-    if (timelineDurationUs == durationUs && timelineIsSeekable == isSeekable) {
+    if (timelineDurationUs == durationUs
+        && timelineIsSeekable == isSeekable
+        && timelineIsLive == isLive) {
       // Suppress no-op source info changes.
       return;
     }
-    notifySourceInfoRefreshed(durationUs, isSeekable);
+    notifySourceInfoRefreshed(durationUs, isSeekable, isLive);
   }
 
   // Internal methods.
 
-  private void notifySourceInfoRefreshed(long durationUs, boolean isSeekable) {
+  private void notifySourceInfoRefreshed(long durationUs, boolean isSeekable, boolean isLive) {
     timelineDurationUs = durationUs;
     timelineIsSeekable = isSeekable;
-    // TODO: Make timeline dynamic until its duration is known. This is non-trivial. See b/69703223.
+    timelineIsLive = isLive;
+    // TODO: Split up isDynamic into multiple fields to indicate which values may change. Then
+    // indicate that the duration may change until it's known. See [internal: b/69703223].
     refreshSourceInfo(
         new SinglePeriodTimeline(
             timelineDurationUs,
             timelineIsSeekable,
             /* isDynamic= */ false,
+            /* isLive= */ timelineIsLive,
             /* manifest= */ null,
             tag));
   }

library/core/src/main/java/com/google/android/exoplayer2/source/SilenceMediaSource.java

@@ -68,7 +68,8 @@ public final class SilenceMediaSource extends BaseMediaSource {
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     refreshSourceInfo(
-        new SinglePeriodTimeline(durationUs, /* isSeekable= */ true, /* isDynamic= */ false));
+        new SinglePeriodTimeline(
+            durationUs, /* isSeekable= */ true, /* isDynamic= */ false, /* isLive= */ false));
   }
 
   @Override

library/core/src/main/java/com/google/android/exoplayer2/source/SinglePeriodTimeline.java

@@ -35,6 +35,7 @@ public final class SinglePeriodTimeline extends Timeline {
   private final long windowDefaultStartPositionUs;
   private final boolean isSeekable;
   private final boolean isDynamic;
+  private final boolean isLive;
   @Nullable private final Object tag;
   @Nullable private final Object manifest;
 
@@ -44,9 +45,11 @@ public final class SinglePeriodTimeline extends Timeline {
    * @param durationUs The duration of the period, in microseconds.
    * @param isSeekable Whether seeking is supported within the period.
    * @param isDynamic Whether the window may change when the timeline is updated.
+   * @param isLive Whether the window is live.
    */
-  public SinglePeriodTimeline(long durationUs, boolean isSeekable, boolean isDynamic) {
+  public SinglePeriodTimeline(
-    this(durationUs, isSeekable, isDynamic, /* manifest= */ null, /* tag= */ null);
+      long durationUs, boolean isSeekable, boolean isDynamic, boolean isLive) {
+    this(durationUs, isSeekable, isDynamic, isLive, /* manifest= */ null, /* tag= */ null);
   }
 
   /**
@@ -55,6 +58,7 @@ public final class SinglePeriodTimeline extends Timeline {
    * @param durationUs The duration of the period, in microseconds.
    * @param isSeekable Whether seeking is supported within the period.
    * @param isDynamic Whether the window may change when the timeline is updated.
+   * @param isLive Whether the window is live.
    * @param manifest The manifest. May be {@code null}.
    * @param tag A tag used for {@link Window#tag}.
    */
@@ -62,6 +66,7 @@ public final class SinglePeriodTimeline extends Timeline {
       long durationUs,
       boolean isSeekable,
       boolean isDynamic,
+      boolean isLive,
       @Nullable Object manifest,
       @Nullable Object tag) {
     this(
@@ -71,6 +76,7 @@ public final class SinglePeriodTimeline extends Timeline {
         /* windowDefaultStartPositionUs= */ 0,
         isSeekable,
         isDynamic,
+        isLive,
         manifest,
         tag);
   }
@@ -87,6 +93,7 @@ public final class SinglePeriodTimeline extends Timeline {
    *     which to begin playback, in microseconds.
    * @param isSeekable Whether seeking is supported within the window.
    * @param isDynamic Whether the window may change when the timeline is updated.
+   * @param isLive Whether the window is live.
    * @param manifest The manifest. May be (@code null}.
    * @param tag A tag used for {@link Timeline.Window#tag}.
    */
@@ -97,6 +104,7 @@ public final class SinglePeriodTimeline extends Timeline {
       long windowDefaultStartPositionUs,
       boolean isSeekable,
       boolean isDynamic,
+      boolean isLive,
       @Nullable Object manifest,
       @Nullable Object tag) {
     this(
@@ -108,6 +116,7 @@ public final class SinglePeriodTimeline extends Timeline {
         windowDefaultStartPositionUs,
         isSeekable,
         isDynamic,
+        isLive,
         manifest,
         tag);
   }
@@ -127,6 +136,7 @@ public final class SinglePeriodTimeline extends Timeline {
    *     which to begin playback, in microseconds.
    * @param isSeekable Whether seeking is supported within the window.
    * @param isDynamic Whether the window may change when the timeline is updated.
+   * @param isLive Whether the window is live.
    * @param manifest The manifest. May be {@code null}.
    * @param tag A tag used for {@link Timeline.Window#tag}.
    */
@@ -139,6 +149,7 @@ public final class SinglePeriodTimeline extends Timeline {
       long windowDefaultStartPositionUs,
       boolean isSeekable,
       boolean isDynamic,
+      boolean isLive,
       @Nullable Object manifest,
       @Nullable Object tag) {
     this.presentationStartTimeMs = presentationStartTimeMs;
@@ -149,6 +160,7 @@ public final class SinglePeriodTimeline extends Timeline {
     this.windowDefaultStartPositionUs = windowDefaultStartPositionUs;
     this.isSeekable = isSeekable;
     this.isDynamic = isDynamic;
+    this.isLive = isLive;
     this.manifest = manifest;
     this.tag = tag;
   }
@@ -182,6 +194,7 @@ public final class SinglePeriodTimeline extends Timeline {
         windowStartTimeMs,
         isSeekable,
         isDynamic,
+        isLive,
         windowDefaultStartPositionUs,
         windowDurationUs,
         0,

library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaSource.java

@@ -291,7 +291,12 @@ public final class SingleSampleMediaSource extends BaseMediaSource {
     dataSpec = new DataSpec(uri, DataSpec.FLAG_ALLOW_GZIP);
     timeline =
         new SinglePeriodTimeline(
-            durationUs, /* isSeekable= */ true, /* isDynamic= */ false, /* manifest= */ null, tag);
+            durationUs,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false,
+            /* manifest= */ null,
+            tag);
   }
 
   // MediaSource implementation.

library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java

@@ -44,7 +44,8 @@ public final class MediaPeriodQueueTest {
   private static final long SECOND_AD_START_TIME_US = 20 * C.MICROS_PER_SECOND;
 
   private static final Timeline CONTENT_TIMELINE =
-      new SinglePeriodTimeline(CONTENT_DURATION_US, /* isSeekable= */ true, /* isDynamic= */ false);
+      new SinglePeriodTimeline(
+          CONTENT_DURATION_US, /* isSeekable= */ true, /* isDynamic= */ false, /* isLive= */ false);
   private static final Uri AD_URI = Uri.EMPTY;
 
   private MediaPeriodQueue mediaPeriodQueue;

library/core/src/test/java/com/google/android/exoplayer2/source/ClippingMediaSourceTest.java

@@ -64,7 +64,12 @@ public final class ClippingMediaSourceTest {
 
   @Test
   public void testNoClipping() throws IOException {
-    Timeline timeline = new SinglePeriodTimeline(TEST_PERIOD_DURATION_US, true, false);
+    Timeline timeline =
+        new SinglePeriodTimeline(
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     Timeline clippedTimeline = getClippedTimeline(timeline, 0, TEST_PERIOD_DURATION_US);
 
@@ -78,7 +83,12 @@ public final class ClippingMediaSourceTest {
 
   @Test
   public void testClippingUnseekableWindowThrows() throws IOException {
-    Timeline timeline = new SinglePeriodTimeline(TEST_PERIOD_DURATION_US, false, false);
+    Timeline timeline =
+        new SinglePeriodTimeline(
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ false,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     // If the unseekable window isn't clipped, clipping succeeds.
     getClippedTimeline(timeline, 0, TEST_PERIOD_DURATION_US);
@@ -93,7 +103,12 @@ public final class ClippingMediaSourceTest {
 
   @Test
   public void testClippingStart() throws IOException {
-    Timeline timeline = new SinglePeriodTimeline(TEST_PERIOD_DURATION_US, true, false);
+    Timeline timeline =
+        new SinglePeriodTimeline(
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     Timeline clippedTimeline =
         getClippedTimeline(timeline, TEST_CLIP_AMOUNT_US, TEST_PERIOD_DURATION_US);
@@ -105,7 +120,12 @@ public final class ClippingMediaSourceTest {
 
   @Test
   public void testClippingEnd() throws IOException {
-    Timeline timeline = new SinglePeriodTimeline(TEST_PERIOD_DURATION_US, true, false);
+    Timeline timeline =
+        new SinglePeriodTimeline(
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     Timeline clippedTimeline =
         getClippedTimeline(timeline, 0, TEST_PERIOD_DURATION_US - TEST_CLIP_AMOUNT_US);
@@ -121,7 +141,8 @@ public final class ClippingMediaSourceTest {
     // to it having loaded sufficient data to establish its duration and seekability. Such timelines
     // should not result in clipping failure.
     Timeline timeline =
-        new SinglePeriodTimeline(C.TIME_UNSET, /* isSeekable= */ false, /* isDynamic= */ true);
+        new SinglePeriodTimeline(
+            C.TIME_UNSET, /* isSeekable= */ false, /* isDynamic= */ true, /* isLive= */ true);
 
     Timeline clippedTimeline =
         getClippedTimeline(
@@ -139,7 +160,8 @@ public final class ClippingMediaSourceTest {
         new SinglePeriodTimeline(
             /* durationUs= */ TEST_PERIOD_DURATION_US,
             /* isSeekable= */ true,
-            /* isDynamic= */ false);
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     // When clipping to the end, the clipped timeline should also have a duration.
     Timeline clippedTimeline =
@@ -153,7 +175,10 @@ public final class ClippingMediaSourceTest {
     // Create a child timeline that has an unknown duration.
     Timeline timeline =
         new SinglePeriodTimeline(
-            /* durationUs= */ C.TIME_UNSET, /* isSeekable= */ true, /* isDynamic= */ false);
+            /* durationUs= */ C.TIME_UNSET,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     // When clipping to the end, the clipped timeline should also have an unset duration.
     Timeline clippedTimeline =
@@ -164,7 +189,12 @@ public final class ClippingMediaSourceTest {
 
   @Test
   public void testClippingStartAndEnd() throws IOException {
-    Timeline timeline = new SinglePeriodTimeline(TEST_PERIOD_DURATION_US, true, false);
+    Timeline timeline =
+        new SinglePeriodTimeline(
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
 
     Timeline clippedTimeline =
         getClippedTimeline(
@@ -185,6 +215,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -207,6 +238,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
     Timeline timeline2 =
@@ -217,6 +249,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -256,6 +289,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
     Timeline timeline2 =
@@ -266,6 +300,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -305,6 +340,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
     Timeline timeline2 =
@@ -315,6 +351,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -355,6 +392,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
     Timeline timeline2 =
@@ -365,6 +403,7 @@ public final class ClippingMediaSourceTest {
             /* windowDefaultStartPositionUs= */ TEST_CLIP_AMOUNT_US,
             /* isSeekable= */ true,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -480,7 +519,10 @@ public final class ClippingMediaSourceTest {
       throws IOException {
     Timeline timeline =
         new SinglePeriodTimeline(
-            TEST_PERIOD_DURATION_US, /* isSeekable= */ true, /* isDynamic= */ false);
+            TEST_PERIOD_DURATION_US,
+            /* isSeekable= */ true,
+            /* isDynamic= */ false,
+            /* isLive= */ false);
     FakeMediaSource fakeMediaSource =
         new FakeMediaSource(timeline) {
           @Override

library/core/src/test/java/com/google/android/exoplayer2/source/SinglePeriodTimelineTest.java

@@ -41,7 +41,9 @@ public final class SinglePeriodTimelineTest {
 
   @Test
   public void testGetPeriodPositionDynamicWindowUnknownDuration() {
-    SinglePeriodTimeline timeline = new SinglePeriodTimeline(C.TIME_UNSET, false, true);
+    SinglePeriodTimeline timeline =
+        new SinglePeriodTimeline(
+            C.TIME_UNSET, /* isSeekable= */ false, /* isDynamic= */ true, /* isLive= */ true);
     // Should return null with any positive position projection.
     Pair<Object, Long> position = timeline.getPeriodPosition(window, period, 0, C.TIME_UNSET, 1);
     assertThat(position).isNull();
@@ -62,6 +64,7 @@ public final class SinglePeriodTimelineTest {
             /* windowDefaultStartPositionUs= */ 0,
             /* isSeekable= */ false,
             /* isDynamic= */ true,
+            /* isLive= */ true,
             /* manifest= */ null,
             /* tag= */ null);
     // Should return null with a positive position projection beyond window duration.
@@ -85,6 +88,7 @@ public final class SinglePeriodTimelineTest {
             /* durationUs= */ C.TIME_UNSET,
             /* isSeekable= */ false,
             /* isDynamic= */ false,
+            /* isLive= */ false,
             /* manifest= */ null,
             /* tag= */ null);
 
@@ -104,6 +108,7 @@ public final class SinglePeriodTimelineTest {
             /* durationUs= */ C.TIME_UNSET,
             /* isSeekable= */ false,
             /* isDynamic= */ false,
+            /* isLive= */ false,
             /* manifest= */ null,
             tag);
 
@@ -117,6 +122,7 @@ public final class SinglePeriodTimelineTest {
             /* durationUs= */ C.TIME_UNSET,
             /* isSeekable= */ false,
             /* isDynamic= */ false,
+            /* isLive= */ false,
             /* manifest= */ null,
             /* tag= */ null);
     Object uid = timeline.getPeriod(/* periodIndex= */ 0, period, /* setIds= */ true).uid;

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java

@@ -1216,10 +1216,6 @@ public final class DashMediaSource extends BaseMediaSource {
       Assertions.checkIndex(windowIndex, 0, 1);
       long windowDefaultStartPositionUs = getAdjustedWindowDefaultStartPositionUs(
           defaultPositionProjectionUs);
-      boolean isDynamic =
-          manifest.dynamic
-              && manifest.minUpdatePeriodMs != C.TIME_UNSET
-              && manifest.durationMs == C.TIME_UNSET;
       return window.set(
           Window.SINGLE_WINDOW_UID,
           windowTag,
@@ -1227,7 +1223,8 @@ public final class DashMediaSource extends BaseMediaSource {
           presentationStartTimeMs,
           windowStartTimeMs,
           /* isSeekable= */ true,
-          isDynamic,
+          /* isDynamic= */ isMovingLiveWindow(manifest),
+          /* isLive= */ manifest.dynamic,
           windowDefaultStartPositionUs,
           windowDurationUs,
           /* firstPeriodIndex= */ 0,
@@ -1247,7 +1244,7 @@ public final class DashMediaSource extends BaseMediaSource {
 
     private long getAdjustedWindowDefaultStartPositionUs(long defaultPositionProjectionUs) {
       long windowDefaultStartPositionUs = this.windowDefaultStartPositionUs;
-      if (!manifest.dynamic) {
+      if (!isMovingLiveWindow(manifest)) {
         return windowDefaultStartPositionUs;
       }
       if (defaultPositionProjectionUs > 0) {
@@ -1292,6 +1289,12 @@ public final class DashMediaSource extends BaseMediaSource {
       Assertions.checkIndex(periodIndex, 0, getPeriodCount());
       return firstPeriodId + periodIndex;
     }
+
+    private static boolean isMovingLiveWindow(DashManifest manifest) {
+      return manifest.dynamic
+          && manifest.minUpdatePeriodMs != C.TIME_UNSET
+          && manifest.durationMs == C.TIME_UNSET;
+    }
   }
 
   private final class DefaultPlayerEmsgCallback implements PlayerEmsgCallback {

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

@@ -439,6 +439,7 @@ public final class HlsMediaSource extends BaseMediaSource
               windowDefaultStartPositionUs,
               /* isSeekable= */ true,
               /* isDynamic= */ !playlist.hasEndTag,
+              /* isLive= */ true,
               manifest,
               tag);
     } else /* not live */ {
@@ -455,6 +456,7 @@ public final class HlsMediaSource extends BaseMediaSource
               windowDefaultStartPositionUs,
               /* isSeekable= */ true,
               /* isDynamic= */ false,
+              /* isLive= */ false,
               manifest,
               tag);
     }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -696,7 +696,8 @@ public final class SsMediaSource extends BaseMediaSource
               /* windowPositionInPeriodUs= */ 0,
               /* windowDefaultStartPositionUs= */ 0,
               /* isSeekable= */ true,
-              manifest.isLive,
+              /* isDynamic= */ manifest.isLive,
+              /* isLive= */ manifest.isLive,
               manifest,
               tag);
     } else if (manifest.isLive) {
@@ -719,6 +720,7 @@ public final class SsMediaSource extends BaseMediaSource
               defaultStartPositionUs,
               /* isSeekable= */ true,
               /* isDynamic= */ true,
+              /* isLive= */ true,
               manifest,
               tag);
     } else {
@@ -732,6 +734,7 @@ public final class SsMediaSource extends BaseMediaSource
               /* windowDefaultStartPositionUs= */ 0,
               /* isSeekable= */ true,
               /* isDynamic= */ false,
+              /* isLive= */ false,
               manifest,
               tag);
     }

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeTimeline.java

@@ -189,6 +189,7 @@ public final class FakeTimeline extends Timeline {
         /* windowStartTimeMs= */ C.TIME_UNSET,
         windowDefinition.isSeekable,
         windowDefinition.isDynamic,
+        /* isLive= */ windowDefinition.isDynamic,
         /* defaultPositionUs= */ 0,
         windowDefinition.durationUs,
         periodOffsets[windowIndex],