Update MediaMetadata from static and dynamic metadata.

PiperOrigin-RevId: 369671127

library/common/src/main/java/com/google/android/exoplayer2/MediaMetadata.java

@@ -18,6 +18,7 @@ package com.google.android.exoplayer2;
 import android.os.Bundle;
 import androidx.annotation.IntDef;
 import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.util.Util;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
@@ -29,20 +30,37 @@ public final class MediaMetadata implements Bundleable {
   /** A builder for {@link MediaMetadata} instances. */
   public static final class Builder {
 
+    @Nullable private String title;
+
     public Builder() {}
 
     private Builder(MediaMetadata mediaMetadata) {
       this.title = mediaMetadata.title;
     }
 
-    @Nullable private String title;
-
     /** Sets the optional title. */
     public Builder setTitle(@Nullable String title) {
       this.title = title;
       return this;
     }
 
+    /**
+     * Sets all fields supported by the {@link Metadata.Entry entries} within the {@link Metadata}.
+     *
+     * <p>Fields are only set if the {@link Metadata.Entry} has an implementation for {@link
+     * Metadata.Entry#populateMediaMetadata(Builder)}.
+     *
+     * <p>In the event that multiple {@link Metadata.Entry} objects within the {@link Metadata}
+     * relate to the same {@link MediaMetadata} field, then the last one will be used.
+     */
+    public Builder populateFromMetadata(Metadata metadata) {
+      for (int i = 0; i < metadata.length(); i++) {
+        Metadata.Entry entry = metadata.get(i);
+        entry.populateMediaMetadata(this);
+      }
+      return this;
+    }
+
     /** Returns a new {@link MediaMetadata} instance with the current builder values. */
     public MediaMetadata build() {
       return new MediaMetadata(/* builder= */ this);

library/common/src/main/java/com/google/android/exoplayer2/Player.java

@@ -150,6 +150,17 @@ public interface Player {
      */
     default void onStaticMetadataChanged(List<Metadata> metadataList) {}
 
+    /**
+     * Called when the combined {@link MediaMetadata} changes.
+     *
+     * <p>The provided {@link MediaMetadata} is a combination of the {@link MediaItem#mediaMetadata}
+     * and the static and dynamic metadata sourced from {@link
+     * EventListener#onStaticMetadataChanged(List)} and {@link MetadataOutput#onMetadata(Metadata)}.
+     *
+     * @param mediaMetadata The combined {@link MediaMetadata}.
+     */
+    default void onMediaMetadataChanged(MediaMetadata mediaMetadata) {}
+
     /**
      * Called when the player starts or stops loading the source.
      *

library/common/src/main/java/com/google/android/exoplayer2/metadata/Metadata.java

@@ -51,6 +51,10 @@ public final class Metadata implements Parcelable {
     /**
      * Updates the {@link MediaMetadata.Builder} with the type specific values stored in this Entry.
      *
+     * <p>The order of the {@link Entry} objects in the {@link Metadata} matters. If two {@link
+     * Entry} entries attempt to populate the same {@link MediaMetadata} field, then the last one in
+     * the list is used.
+     *
      * @param builder The builder to be updated.
      */
     default void populateMediaMetadata(MediaMetadata.Builder builder) {}

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

@@ -2067,6 +2067,14 @@ public class SimpleExoPlayer extends BasePlayer
     return keepSessionIdAudioTrack.getAudioSessionId();
   }
 
+  private void setMediaMetadata(MediaMetadata mediaMetadata) {
+    if (this.currentMediaMetadata.equals(mediaMetadata)) {
+      return;
+    }
+    this.currentMediaMetadata = mediaMetadata;
+    componentListener.onMediaMetadataChanged(this.currentMediaMetadata);
+  }
+
   private static DeviceInfo createDeviceInfo(StreamVolumeManager streamVolumeManager) {
     return new DeviceInfo(
         DeviceInfo.PLAYBACK_TYPE_LOCAL,
@@ -2242,6 +2250,7 @@ public class SimpleExoPlayer extends BasePlayer
     @Override
     public void onMetadata(Metadata metadata) {
       analyticsCollector.onMetadata(metadata);
+      setMediaMetadata(getMediaMetadata().buildUpon().populateFromMetadata(metadata).build());
       for (MetadataOutput metadataOutput : metadataOutputs) {
         metadataOutput.onMetadata(metadata);
       }
@@ -2371,6 +2380,16 @@ public class SimpleExoPlayer extends BasePlayer
       currentMediaMetadata = mediaItem == null ? MediaMetadata.EMPTY : mediaItem.mediaMetadata;
     }
 
+    @Override
+    public void onStaticMetadataChanged(List<Metadata> metadataList) {
+      MediaMetadata.Builder metadataBuilder = getMediaMetadata().buildUpon();
+      for (int i = 0; i < metadataList.size(); i++) {
+        metadataBuilder.populateFromMetadata(metadataList.get(i));
+      }
+
+      setMediaMetadata(metadataBuilder.build());
+    }
+
     @Override
     public void onPlaybackStateChanged(@State int playbackState) {
       updateWakeAndWifiLock();