add default methods isSingleWindow and getInitialTimeline to MediaSource interface

PiperOrigin-RevId: 277695826

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

@@ -19,6 +19,7 @@ import android.util.Pair;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.source.ads.AdPlaybackState;
 import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.Util;
 
 /**
  * A flexible representation of the structure of media. A timeline is able to represent the
@@ -278,6 +279,48 @@ public abstract class Timeline {
       return positionInFirstPeriodUs;
     }
 
+    @Override
+    public boolean equals(@Nullable Object obj) {
+      if (this == obj) {
+        return true;
+      }
+      if (obj == null || !getClass().equals(obj.getClass())) {
+        return false;
+      }
+      Window that = (Window) obj;
+      return Util.areEqual(uid, that.uid)
+          && Util.areEqual(tag, that.tag)
+          && Util.areEqual(manifest, that.manifest)
+          && presentationStartTimeMs == that.presentationStartTimeMs
+          && windowStartTimeMs == that.windowStartTimeMs
+          && isSeekable == that.isSeekable
+          && isDynamic == that.isDynamic
+          && isLive == that.isLive
+          && defaultPositionUs == that.defaultPositionUs
+          && durationUs == that.durationUs
+          && firstPeriodIndex == that.firstPeriodIndex
+          && lastPeriodIndex == that.lastPeriodIndex
+          && positionInFirstPeriodUs == that.positionInFirstPeriodUs;
+    }
+
+    @Override
+    public int hashCode() {
+      int result = 7;
+      result = 31 * result + uid.hashCode();
+      result = 31 * result + (tag == null ? 0 : tag.hashCode());
+      result = 31 * result + (manifest == null ? 0 : manifest.hashCode());
+      result = 31 * result + (int) (presentationStartTimeMs ^ (presentationStartTimeMs >>> 32));
+      result = 31 * result + (int) (windowStartTimeMs ^ (windowStartTimeMs >>> 32));
+      result = 31 * result + (isSeekable ? 1 : 0);
+      result = 31 * result + (isDynamic ? 1 : 0);
+      result = 31 * result + (isLive ? 1 : 0);
+      result = 31 * result + (int) (defaultPositionUs ^ (defaultPositionUs >>> 32));
+      result = 31 * result + (int) (durationUs ^ (durationUs >>> 32));
+      result = 31 * result + firstPeriodIndex;
+      result = 31 * result + lastPeriodIndex;
+      result = 31 * result + (int) (positionInFirstPeriodUs ^ (positionInFirstPeriodUs >>> 32));
+      return result;
+    }
   }
 
   /**
@@ -534,6 +577,34 @@ public abstract class Timeline {
       return adPlaybackState.adResumePositionUs;
     }
 
+    @Override
+    public boolean equals(@Nullable Object obj) {
+      if (this == obj) {
+        return true;
+      }
+      if (obj == null || !getClass().equals(obj.getClass())) {
+        return false;
+      }
+      Period that = (Period) obj;
+      return Util.areEqual(id, that.id)
+          && Util.areEqual(uid, that.uid)
+          && windowIndex == that.windowIndex
+          && durationUs == that.durationUs
+          && positionInWindowUs == that.positionInWindowUs
+          && Util.areEqual(adPlaybackState, that.adPlaybackState);
+    }
+
+    @Override
+    public int hashCode() {
+      int result = 7;
+      result = 31 * result + (id == null ? 0 : id.hashCode());
+      result = 31 * result + (uid == null ? 0 : uid.hashCode());
+      result = 31 * result + windowIndex;
+      result = 31 * result + (int) (durationUs ^ (durationUs >>> 32));
+      result = 31 * result + (int) (positionInWindowUs ^ (positionInWindowUs >>> 32));
+      result = 31 * result + (adPlaybackState == null ? 0 : adPlaybackState.hashCode());
+      return result;
+    }
   }
 
   /** An empty timeline. */

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

@@ -139,6 +139,23 @@ public final class ConcatenatingMediaSource extends CompositeMediaSource<MediaSo
     addMediaSources(Arrays.asList(mediaSources));
   }
 
+  @Override
+  public synchronized Timeline getInitialTimeline() {
+    ShuffleOrder shuffleOrder =
+        this.shuffleOrder.getLength() != mediaSourcesPublic.size()
+            ? this.shuffleOrder
+                .cloneAndClear()
+                .cloneAndInsert(
+                    /* insertionIndex= */ 0, /* insertionCount= */ mediaSourcesPublic.size())
+            : this.shuffleOrder;
+    return new ConcatenatedTimeline(mediaSourcesPublic, shuffleOrder, isAtomic);
+  }
+
+  @Override
+  public boolean isSingleWindow() {
+    return false;
+  }
+
   /**
    * Appends a {@link MediaSource} to the playlist.
    *

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

@@ -35,7 +35,7 @@ import java.util.Map;
  */
 public final class LoopingMediaSource extends CompositeMediaSource<Void> {
 
-  private final MediaSource childSource;
+  private final MaskingMediaSource maskingMediaSource;
   private final int loopCount;
   private final Map<MediaPeriodId, MediaPeriodId> childMediaPeriodIdToMediaPeriodId;
   private final Map<MediaPeriod, MediaPeriodId> mediaPeriodToChildMediaPeriodId;
@@ -58,7 +58,7 @@ public final class LoopingMediaSource extends CompositeMediaSource<Void> {
    */
   public LoopingMediaSource(MediaSource childSource, int loopCount) {
     Assertions.checkArgument(loopCount > 0);
-    this.childSource = childSource;
+    this.maskingMediaSource = new MaskingMediaSource(childSource, /* useLazyPreparation= */ false);
     this.loopCount = loopCount;
     childMediaPeriodIdToMediaPeriodId = new HashMap<>();
     mediaPeriodToChildMediaPeriodId = new HashMap<>();
@@ -67,32 +67,45 @@ public final class LoopingMediaSource extends CompositeMediaSource<Void> {
   @Override
   @Nullable
   public Object getTag() {
-    return childSource.getTag();
+    return maskingMediaSource.getTag();
+  }
+
+  @Nullable
+  @Override
+  public Timeline getInitialTimeline() {
+    return loopCount != Integer.MAX_VALUE
+        ? new LoopingTimeline(maskingMediaSource.getTimeline(), loopCount)
+        : new InfinitelyLoopingTimeline(maskingMediaSource.getTimeline());
+  }
+
+  @Override
+  public boolean isSingleWindow() {
+    return false;
   }
 
   @Override
   protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
     super.prepareSourceInternal(mediaTransferListener);
-    prepareChildSource(/* id= */ null, childSource);
+    prepareChildSource(/* id= */ null, maskingMediaSource);
   }
 
   @Override
   public MediaPeriod createPeriod(MediaPeriodId id, Allocator allocator, long startPositionUs) {
     if (loopCount == Integer.MAX_VALUE) {
-      return childSource.createPeriod(id, allocator, startPositionUs);
+      return maskingMediaSource.createPeriod(id, allocator, startPositionUs);
     }
     Object childPeriodUid = LoopingTimeline.getChildPeriodUidFromConcatenatedUid(id.periodUid);
     MediaPeriodId childMediaPeriodId = id.copyWithPeriodUid(childPeriodUid);
     childMediaPeriodIdToMediaPeriodId.put(childMediaPeriodId, id);
     MediaPeriod mediaPeriod =
-        childSource.createPeriod(childMediaPeriodId, allocator, startPositionUs);
+        maskingMediaSource.createPeriod(childMediaPeriodId, allocator, startPositionUs);
     mediaPeriodToChildMediaPeriodId.put(mediaPeriod, childMediaPeriodId);
     return mediaPeriod;
   }
 
   @Override
   public void releasePeriod(MediaPeriod mediaPeriod) {
-    childSource.releasePeriod(mediaPeriod);
+    maskingMediaSource.releasePeriod(mediaPeriod);
     MediaPeriodId childMediaPeriodId = mediaPeriodToChildMediaPeriodId.remove(mediaPeriod);
     if (childMediaPeriodId != null) {
       childMediaPeriodIdToMediaPeriodId.remove(childMediaPeriodId);

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

@@ -43,6 +43,7 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
   @Nullable private EventDispatcher unpreparedMaskingMediaPeriodEventDispatcher;
   private boolean hasStartedPreparing;
   private boolean isPrepared;
+  private boolean hasRealTimeline;
 
   /**
    * Creates the masking media source.
@@ -54,14 +55,22 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
    */
   public MaskingMediaSource(MediaSource mediaSource, boolean useLazyPreparation) {
     this.mediaSource = mediaSource;
-    this.useLazyPreparation = useLazyPreparation;
+    this.useLazyPreparation = useLazyPreparation && mediaSource.isSingleWindow();
     window = new Timeline.Window();
     period = new Timeline.Period();
+    Timeline initialTimeline = mediaSource.getInitialTimeline();
+    if (initialTimeline != null) {
+      timeline =
+          MaskingTimeline.createWithRealTimeline(
+              initialTimeline, /* firstWindowUid= */ null, /* firstPeriodUid= */ null);
+      hasRealTimeline = true;
+    } else {
       timeline = MaskingTimeline.createWithDummyTimeline(mediaSource.getTag());
     }
+  }
 
   /** Returns the {@link Timeline}. */
-  public Timeline getTimeline() {
+  public synchronized Timeline getTimeline() {
     return timeline;
   }
 
@@ -129,13 +138,15 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
   }
 
   @Override
-  protected void onChildSourceInfoRefreshed(
+  protected synchronized void onChildSourceInfoRefreshed(
       Void id, MediaSource mediaSource, Timeline newTimeline) {
     if (isPrepared) {
       timeline = timeline.cloneWithUpdatedTimeline(newTimeline);
     } else if (newTimeline.isEmpty()) {
       timeline =
-          MaskingTimeline.createWithRealTimeline(
+          hasRealTimeline
+              ? timeline.cloneWithUpdatedTimeline(newTimeline)
+              : MaskingTimeline.createWithRealTimeline(
                   newTimeline, Window.SINGLE_WINDOW_UID, MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID);
     } else {
       // Determine first period and the start position.
@@ -164,7 +175,10 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
               window, period, /* windowIndex= */ 0, windowStartPositionUs);
       Object periodUid = periodPosition.first;
       long periodPositionUs = periodPosition.second;
-      timeline = MaskingTimeline.createWithRealTimeline(newTimeline, windowUid, periodUid);
+      timeline =
+          hasRealTimeline
+              ? timeline.cloneWithUpdatedTimeline(newTimeline)
+              : MaskingTimeline.createWithRealTimeline(newTimeline, windowUid, periodUid);
       if (unpreparedMaskingMediaPeriod != null) {
         MaskingMediaPeriod maskingPeriod = unpreparedMaskingMediaPeriod;
         maskingPeriod.overridePreparePositionUs(periodPositionUs);
@@ -173,6 +187,7 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
         maskingPeriod.createPeriod(idInSource);
       }
     }
+    hasRealTimeline = true;
     isPrepared = true;
     refreshSourceInfo(this.timeline);
   }
@@ -193,13 +208,15 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
   }
 
   private Object getInternalPeriodUid(Object externalPeriodUid) {
-    return externalPeriodUid.equals(MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID)
+    return timeline.replacedInternalPeriodUid != null
+            && externalPeriodUid.equals(MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID)
         ? timeline.replacedInternalPeriodUid
         : externalPeriodUid;
   }
 
   private Object getExternalPeriodUid(Object internalPeriodUid) {
-    return timeline.replacedInternalPeriodUid.equals(internalPeriodUid)
+    return timeline.replacedInternalPeriodUid != null
+            && timeline.replacedInternalPeriodUid.equals(internalPeriodUid)
         ? MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID
         : internalPeriodUid;
   }
@@ -212,8 +229,8 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
 
     public static final Object DUMMY_EXTERNAL_PERIOD_UID = new Object();
 
-    private final Object replacedInternalWindowUid;
+    @Nullable private final Object replacedInternalWindowUid;
-    private final Object replacedInternalPeriodUid;
+    @Nullable private final Object replacedInternalPeriodUid;
 
     /**
      * Returns an instance with a dummy timeline using the provided window tag.
@@ -236,12 +253,14 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
      *     assigned {@link #DUMMY_EXTERNAL_PERIOD_UID}.
      */
     public static MaskingTimeline createWithRealTimeline(
-        Timeline timeline, Object firstWindowUid, Object firstPeriodUid) {
+        Timeline timeline, @Nullable Object firstWindowUid, @Nullable Object firstPeriodUid) {
       return new MaskingTimeline(timeline, firstWindowUid, firstPeriodUid);
     }
 
     private MaskingTimeline(
-        Timeline timeline, Object replacedInternalWindowUid, Object replacedInternalPeriodUid) {
+        Timeline timeline,
+        @Nullable Object replacedInternalWindowUid,
+        @Nullable Object replacedInternalPeriodUid) {
       super(timeline);
       this.replacedInternalWindowUid = replacedInternalWindowUid;
       this.replacedInternalPeriodUid = replacedInternalPeriodUid;
@@ -273,7 +292,7 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
     @Override
     public Period getPeriod(int periodIndex, Period period, boolean setIds) {
       timeline.getPeriod(periodIndex, period, setIds);
-      if (Util.areEqual(period.uid, replacedInternalPeriodUid)) {
+      if (Util.areEqual(period.uid, replacedInternalPeriodUid) && setIds) {
         period.uid = DUMMY_EXTERNAL_PERIOD_UID;
       }
       return period;
@@ -282,7 +301,9 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
     @Override
     public int getIndexOfPeriod(Object uid) {
       return timeline.getIndexOfPeriod(
-          DUMMY_EXTERNAL_PERIOD_UID.equals(uid) ? replacedInternalPeriodUid : uid);
+          DUMMY_EXTERNAL_PERIOD_UID.equals(uid) && replacedInternalPeriodUid != null
+              ? replacedInternalPeriodUid
+              : uid);
     }
 
     @Override
@@ -333,8 +354,8 @@ public final class MaskingMediaSource extends CompositeMediaSource<Void> {
     @Override
     public Period getPeriod(int periodIndex, Period period, boolean setIds) {
       return period.set(
-          /* id= */ 0,
+          /* id= */ setIds ? 0 : null,
-          /* uid= */ MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID,
+          /* uid= */ setIds ? MaskingTimeline.DUMMY_EXTERNAL_PERIOD_UID : null,
           /* windowIndex= */ 0,
           /* durationUs = */ C.TIME_UNSET,
           /* positionInWindowUs= */ 0);

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

@@ -228,6 +228,33 @@ public interface MediaSource {
    */
   void removeEventListener(MediaSourceEventListener eventListener);
 
+  /**
+   * Returns the initial dummy timeline that is returned immediately when the real timeline is not
+   * yet known, or null to let the player create an initial timeline.
+   *
+   * <p>The initial timeline must use the same uids for windows and periods that the real timeline
+   * will use. It also must provide windows which are marked as dynamic to indicate that the window
+   * is expected to change when the real timeline arrives.
+   *
+   * <p>Any media source which has multiple windows should typically provide such an initial
+   * timeline to make sure the player reports the correct number of windows immediately.
+   */
+  @Nullable
+  default Timeline getInitialTimeline() {
+    return null;
+  }
+
+  /**
+   * Returns true if the media source is guaranteed to never have zero or more than one window.
+   *
+   * <p>The default implementation returns {@code true}.
+   *
+   * @return true if the source has exactly one window.
+   */
+  default boolean isSingleWindow() {
+    return true;
+  }
+
   /** Returns the tag set on the media source, or null if none was set. */
   @Nullable
   default Object getTag() {

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

@@ -15,6 +15,8 @@
  */
 package com.google.android.exoplayer2;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.testutil.FakeTimeline;
 import com.google.android.exoplayer2.testutil.FakeTimeline.TimelineWindowDefinition;
@@ -58,4 +60,148 @@ public class TimelineTest {
     TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ONE, false, 0);
     TimelineAsserts.assertNextWindowIndices(timeline, Player.REPEAT_MODE_ALL, false, 0);
   }
+
+  @Test
+  public void testWindowEquals() {
+    Timeline.Window window = new Timeline.Window();
+    assertThat(window).isEqualTo(new Timeline.Window());
+
+    Timeline.Window otherWindow = new Timeline.Window();
+    otherWindow.tag = new Object();
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.manifest = new Object();
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.presentationStartTimeMs = C.TIME_UNSET;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.windowStartTimeMs = C.TIME_UNSET;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.isSeekable = true;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.isDynamic = true;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.isLive = true;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.defaultPositionUs = C.TIME_UNSET;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.durationUs = C.TIME_UNSET;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.firstPeriodIndex = 1;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.lastPeriodIndex = 1;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    otherWindow = new Timeline.Window();
+    otherWindow.positionInFirstPeriodUs = C.TIME_UNSET;
+    assertThat(window).isNotEqualTo(otherWindow);
+
+    window.uid = new Object();
+    window.tag = new Object();
+    window.manifest = new Object();
+    window.presentationStartTimeMs = C.TIME_UNSET;
+    window.windowStartTimeMs = C.TIME_UNSET;
+    window.isSeekable = true;
+    window.isDynamic = true;
+    window.isLive = true;
+    window.defaultPositionUs = C.TIME_UNSET;
+    window.durationUs = C.TIME_UNSET;
+    window.firstPeriodIndex = 1;
+    window.lastPeriodIndex = 1;
+    window.positionInFirstPeriodUs = C.TIME_UNSET;
+    otherWindow =
+        otherWindow.set(
+            window.uid,
+            window.tag,
+            window.manifest,
+            window.presentationStartTimeMs,
+            window.windowStartTimeMs,
+            window.isSeekable,
+            window.isDynamic,
+            window.isLive,
+            window.defaultPositionUs,
+            window.durationUs,
+            window.firstPeriodIndex,
+            window.lastPeriodIndex,
+            window.positionInFirstPeriodUs);
+    assertThat(window).isEqualTo(otherWindow);
+  }
+
+  @Test
+  public void testWindowHashCode() {
+    Timeline.Window window = new Timeline.Window();
+    Timeline.Window otherWindow = new Timeline.Window();
+    assertThat(window.hashCode()).isEqualTo(otherWindow.hashCode());
+
+    window.tag = new Object();
+    assertThat(window.hashCode()).isNotEqualTo(otherWindow.hashCode());
+    otherWindow.tag = window.tag;
+    assertThat(window.hashCode()).isEqualTo(otherWindow.hashCode());
+  }
+
+  @Test
+  public void testPeriodEquals() {
+    Timeline.Period period = new Timeline.Period();
+    assertThat(period).isEqualTo(new Timeline.Period());
+
+    Timeline.Period otherPeriod = new Timeline.Period();
+    otherPeriod.id = new Object();
+    assertThat(period).isNotEqualTo(otherPeriod);
+
+    otherPeriod = new Timeline.Period();
+    otherPeriod.uid = new Object();
+    assertThat(period).isNotEqualTo(otherPeriod);
+
+    otherPeriod = new Timeline.Period();
+    otherPeriod.windowIndex = 12;
+    assertThat(period).isNotEqualTo(otherPeriod);
+
+    otherPeriod = new Timeline.Period();
+    otherPeriod.durationUs = 11L;
+    assertThat(period).isNotEqualTo(otherPeriod);
+
+    otherPeriod = new Timeline.Period();
+    period.id = new Object();
+    period.uid = new Object();
+    period.windowIndex = 1;
+    period.durationUs = 123L;
+    otherPeriod =
+        otherPeriod.set(
+            period.id,
+            period.uid,
+            period.windowIndex,
+            period.durationUs,
+            /* positionInWindowUs= */ 0);
+    assertThat(period).isEqualTo(otherPeriod);
+  }
+
+  @Test
+  public void testPeriodHashCode() {
+    Timeline.Period period = new Timeline.Period();
+    Timeline.Period otherPeriod = new Timeline.Period();
+    assertThat(period.hashCode()).isEqualTo(otherPeriod.hashCode());
+
+    period.windowIndex = 12;
+    assertThat(period.hashCode()).isNotEqualTo(otherPeriod.hashCode());
+    otherPeriod.windowIndex = period.windowIndex;
+    assertThat(period.hashCode()).isEqualTo(otherPeriod.hashCode());
+  }
 }

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

@@ -40,6 +40,7 @@ public final class FakeTimeline extends Timeline {
     public final Object id;
     public final boolean isSeekable;
     public final boolean isDynamic;
+    public final boolean isLive;
     public final long durationUs;
     public final AdPlaybackState adPlaybackState;
 
@@ -99,10 +100,41 @@ public final class FakeTimeline extends Timeline {
         boolean isDynamic,
         long durationUs,
         AdPlaybackState adPlaybackState) {
+      this(
+          periodCount,
+          id,
+          isSeekable,
+          isDynamic,
+          /* isLive= */ isDynamic,
+          durationUs,
+          adPlaybackState);
+    }
+
+    /**
+     * Creates a window definition with ad groups.
+     *
+     * @param periodCount The number of periods in the window. Each period get an equal slice of the
+     *     total window duration.
+     * @param id The UID of the window.
+     * @param isSeekable Whether the window is seekable.
+     * @param isDynamic Whether the window is dynamic.
+     * @param isLive Whether the window is live.
+     * @param durationUs The duration of the window in microseconds.
+     * @param adPlaybackState The ad playback state.
+     */
+    public TimelineWindowDefinition(
+        int periodCount,
+        Object id,
+        boolean isSeekable,
+        boolean isDynamic,
+        boolean isLive,
+        long durationUs,
+        AdPlaybackState adPlaybackState) {
       this.periodCount = periodCount;
       this.id = id;
       this.isSeekable = isSeekable;
       this.isDynamic = isDynamic;
+      this.isLive = isLive;
       this.durationUs = durationUs;
       this.adPlaybackState = adPlaybackState;
     }
@@ -189,7 +221,7 @@ public final class FakeTimeline extends Timeline {
         /* windowStartTimeMs= */ C.TIME_UNSET,
         windowDefinition.isSeekable,
         windowDefinition.isDynamic,
-        /* isLive= */ windowDefinition.isDynamic,
+        windowDefinition.isLive,
         /* defaultPositionUs= */ 0,
         windowDefinition.durationUs,
         periodOffsets[windowIndex],