Migrate usages of deprecated Window#tag

PiperOrigin-RevId: 321169585

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

@@ -55,7 +55,8 @@ public final class SilenceMediaSource extends BaseMediaSource {
     /**
      * Sets a tag for the media source which will be published in the {@link
      * com.google.android.exoplayer2.Timeline} of the source as {@link
-     * com.google.android.exoplayer2.Timeline.Window#tag}.
+     * com.google.android.exoplayer2.MediaItem.PlaybackProperties#tag
+     * Window#mediaItem.playbackProperties.tag}.
      *
      * @param tag A tag for the media source.
      * @return This factory, for convenience.

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

@@ -80,7 +80,8 @@ public final class SingleSampleMediaSource extends BaseMediaSource {
 
     /**
      * Sets a tag for the media source which will be published in the {@link Timeline} of the source
-     * as {@link Timeline.Window#tag}.
+     * as {@link com.google.android.exoplayer2.MediaItem.PlaybackProperties#tag
+     * Window#mediaItem.playbackProperties.tag}.
      *
      * @param tag A tag for the media source.
      * @return This factory, for convenience.

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

@@ -89,6 +89,7 @@ public final class SinglePeriodTimelineTest {
   }
 
   @Test
+  @SuppressWarnings("deprecation") // Testing deprecated Window.tag is still populated correctly.
   public void setNullTag_returnsNullTag_butUsesDefaultUid() {
     SinglePeriodTimeline timeline =
         new SinglePeriodTimeline(
@@ -100,6 +101,8 @@ public final class SinglePeriodTimelineTest {
             new MediaItem.Builder().setUri(Uri.EMPTY).setTag(null).build());
 
     assertThat(timeline.getWindow(/* windowIndex= */ 0, window).tag).isNull();
+    assertThat(timeline.getWindow(/* windowIndex= */ 0, window).mediaItem.playbackProperties.tag)
+        .isNull();
     assertThat(timeline.getPeriod(/* periodIndex= */ 0, period, /* setIds= */ false).id).isNull();
     assertThat(timeline.getPeriod(/* periodIndex= */ 0, period, /* setIds= */ true).id).isNull();
     assertThat(timeline.getPeriod(/* periodIndex= */ 0, period, /* setIds= */ false).uid).isNull();
@@ -108,6 +111,7 @@ public final class SinglePeriodTimelineTest {
   }
 
   @Test
+  @SuppressWarnings("deprecation") // Testing deprecated Window.tag is still populated correctly.
   public void getWindow_setsTag() {
     Object tag = new Object();
     SinglePeriodTimeline timeline =

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

@@ -18,11 +18,13 @@ package com.google.android.exoplayer2.testutil;
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.Timeline.Period;
 import com.google.android.exoplayer2.Timeline.Window;
 import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.Util;
 import org.checkerframework.checker.nullness.compatqual.NullableType;
 
 /** Unit test for {@link Timeline}. */
@@ -57,7 +59,9 @@ public final class TimelineAsserts {
     for (int i = 0; i < timeline.getWindowCount(); i++) {
       timeline.getWindow(i, window);
       if (expectedWindowTags[i] != null) {
-        assertThat(window.tag).isEqualTo(expectedWindowTags[i]);
+        MediaItem.PlaybackProperties playbackProperties = window.mediaItem.playbackProperties;
+        assertThat(playbackProperties).isNotNull();
+        assertThat(Util.castNonNull(playbackProperties).tag).isEqualTo(expectedWindowTags[i]);
       }
     }
   }