Replace manifest uri without changing the media item

We aim to have the same media item instance published in the timeline that is passed to the createMediaSource(mediaItem) method. This means when the manifest uri is manually replaced by a developer, the media item published in the next timeline update is still the same.

Note: This leads to the fact that the manifest published in that timeline is loaded from a different URI than the URI of the media item in the same timeline.
PiperOrigin-RevId: 313375421

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

@@ -16,7 +16,6 @@
 package com.google.android.exoplayer2.source.dash;
 
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
-import static com.google.android.exoplayer2.util.Util.castNonNull;
 
 import android.net.Uri;
 import android.os.Handler;
@@ -453,6 +452,8 @@ public final class DashMediaSource extends BaseMediaSource {
   private final Runnable simulateManifestRefreshRunnable;
   private final PlayerEmsgCallback playerEmsgCallback;
   private final LoaderErrorThrower manifestLoadErrorThrower;
+  private final MediaItem mediaItem;
+  private final MediaItem.PlaybackProperties playbackProperties;
 
   private DataSource dataSource;
   private Loader loader;
@@ -461,9 +462,8 @@ public final class DashMediaSource extends BaseMediaSource {
   private IOException manifestFatalError;
   private Handler handler;
 
-  private MediaItem mediaItem;
-  private MediaItem.PlaybackProperties playbackProperties;
   private Uri manifestUri;
+  private Uri initialManifestUri;
   private DashManifest manifest;
   private boolean manifestLoadPending;
   private long manifestLoadStartTimestampMs;
@@ -604,6 +604,7 @@ public final class DashMediaSource extends BaseMediaSource {
     this.mediaItem = mediaItem;
     this.playbackProperties = checkNotNull(mediaItem.playbackProperties);
     this.manifestUri = playbackProperties.uri;
+    this.initialManifestUri = playbackProperties.uri;
     this.manifest = manifest;
     this.manifestDataSourceFactory = manifestDataSourceFactory;
     this.manifestParser = manifestParser;
@@ -642,8 +643,7 @@ public final class DashMediaSource extends BaseMediaSource {
   public void replaceManifestUri(Uri manifestUri) {
     synchronized (manifestUriLock) {
       this.manifestUri = manifestUri;
-      this.mediaItem = mediaItem.buildUpon().setUri(manifestUri).build();
+      this.initialManifestUri = manifestUri;
-      this.playbackProperties = castNonNull(mediaItem.playbackProperties);
     }
   }
 
@@ -722,7 +722,7 @@ public final class DashMediaSource extends BaseMediaSource {
     manifestLoadStartTimestampMs = 0;
     manifestLoadEndTimestampMs = 0;
     manifest = sideloadedManifest ? manifest : null;
-    manifestUri = playbackProperties.uri;
+    manifestUri = initialManifestUri;
     manifestFatalError = null;
     if (handler != null) {
       handler.removeCallbacksAndMessages(null);

library/dash/src/test/java/com/google/android/exoplayer2/source/dash/DashMediaSourceTest.java

@@ -17,14 +17,14 @@ package com.google.android.exoplayer2.source.dash;
 
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.fail;
-import static org.mockito.Mockito.mock;
 
+import android.net.Uri;
 import androidx.annotation.Nullable;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.ParserException;
 import com.google.android.exoplayer2.offline.StreamKey;
-import com.google.android.exoplayer2.upstream.DataSource;
+import com.google.android.exoplayer2.upstream.FileDataSource;
 import com.google.android.exoplayer2.upstream.ParsingLoadable;
 import com.google.android.exoplayer2.util.Util;
 import com.google.common.collect.ImmutableList;
@@ -81,7 +81,7 @@ public final class DashMediaSourceTest {
     Object tag = new Object();
     MediaItem mediaItem = MediaItem.fromUri("http://www.google.com");
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class)).setTag(tag);
+        new DashMediaSource.Factory(new FileDataSource.Factory()).setTag(tag);
 
     MediaItem dashMediaItem = factory.createMediaSource(mediaItem).getMediaItem();
 
@@ -99,7 +99,7 @@ public final class DashMediaSourceTest {
     MediaItem mediaItem =
         new MediaItem.Builder().setUri("http://www.google.com").setTag(mediaItemTag).build();
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class)).setTag(factoryTag);
+        new DashMediaSource.Factory(new FileDataSource.Factory()).setTag(factoryTag);
 
     MediaItem dashMediaItem = factory.createMediaSource(mediaItem).getMediaItem();
 
@@ -115,7 +115,7 @@ public final class DashMediaSourceTest {
     Object tag = new Object();
     MediaItem mediaItem = MediaItem.fromUri("http://www.google.com");
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class)).setTag(tag);
+        new DashMediaSource.Factory(new FileDataSource.Factory()).setTag(tag);
 
     @Nullable Object mediaSourceTag = factory.createMediaSource(mediaItem).getTag();
 
@@ -130,7 +130,7 @@ public final class DashMediaSourceTest {
     MediaItem mediaItem =
         new MediaItem.Builder().setUri("http://www.google.com").setTag(tag).build();
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class)).setTag(new Object());
+        new DashMediaSource.Factory(new FileDataSource.Factory()).setTag(new Object());
 
     @Nullable Object mediaSourceTag = factory.createMediaSource(mediaItem).getTag();
 
@@ -144,7 +144,7 @@ public final class DashMediaSourceTest {
     MediaItem mediaItem = MediaItem.fromUri("http://www.google.com");
     StreamKey streamKey = new StreamKey(/* groupIndex= */ 0, /* trackIndex= */ 1);
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class))
+        new DashMediaSource.Factory(new FileDataSource.Factory())
             .setStreamKeys(ImmutableList.of(streamKey));
 
     MediaItem dashMediaItem = factory.createMediaSource(mediaItem).getMediaItem();
@@ -165,7 +165,7 @@ public final class DashMediaSourceTest {
             .setStreamKeys(ImmutableList.of(mediaItemStreamKey))
             .build();
     DashMediaSource.Factory factory =
-        new DashMediaSource.Factory(mock(DataSource.Factory.class))
+        new DashMediaSource.Factory(new FileDataSource.Factory())
             .setStreamKeys(
                 ImmutableList.of(new StreamKey(/* groupIndex= */ 1, /* trackIndex= */ 0)));
 
@@ -176,6 +176,17 @@ public final class DashMediaSourceTest {
     assertThat(dashMediaItem.playbackProperties.streamKeys).containsExactly(mediaItemStreamKey);
   }
 
+  @Test
+  public void replaceManifestUri_doesNotChangeMediaItem() {
+    DashMediaSource.Factory factory = new DashMediaSource.Factory(new FileDataSource.Factory());
+    MediaItem mediaItem = MediaItem.fromUri("http://www.google.com");
+    DashMediaSource mediaSource = factory.createMediaSource(mediaItem);
+
+    mediaSource.replaceManifestUri(Uri.EMPTY);
+
+    assertThat(mediaSource.getMediaItem()).isEqualTo(mediaItem);
+  }
+
   private static void assertParseStringToLong(
       long expected, ParsingLoadable.Parser<Long> parser, String data) throws IOException {
     long actual = parser.parse(null, new ByteArrayInputStream(Util.getUtf8Bytes(data)));