Add the HlsMetadataEntry from the Master playlist to the Hls tracks

PiperOrigin-RevId: 243624081

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

@@ -1059,12 +1059,18 @@ public final class Format implements Parcelable {
       @Nullable String label,
       @Nullable String sampleMimeType,
       @Nullable String codecs,
+      @Nullable Metadata metadata,
       int bitrate,
       int width,
       int height,
       int channelCount,
       @C.SelectionFlags int selectionFlags,
       @Nullable String language) {
+
+    if (this.metadata != null) {
+      metadata = this.metadata.copyWithAppendedEntriesFrom(metadata);
+    }
+
     return new Format(
         id,
         label,
@@ -1127,6 +1133,12 @@ public final class Format implements Parcelable {
         codecs = codecsOfType;
       }
     }
+
+    Metadata metadata =
+        this.metadata == null
+            ? manifestFormat.metadata
+            : this.metadata.copyWithAppendedEntriesFrom(manifestFormat.metadata);
+
     float frameRate = this.frameRate;
     if (frameRate == NO_VALUE && trackType == C.TRACK_TYPE_VIDEO) {
       frameRate = manifestFormat.frameRate;

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

@@ -78,6 +78,21 @@ public final class Metadata implements Parcelable {
     return entries[index];
   }
 
+  /**
+   * Returns a copy of this metadata with the entries of the specified metadata appended. Returns
+   * this instance if {@code other} is null.
+   *
+   * @param other The metadata that holds the entries to append. If null, this methods returns this
+   *     instance.
+   * @return The metadata instance with the appended entries.
+   */
+  public Metadata copyWithAppendedEntriesFrom(@Nullable Metadata other) {
+    if (other == null) {
+      return this;
+    }
+    return copyWithAppendedEntries(other.entries);
+  }
+
   /**
    * Returns a copy of this metadata with the specified entries appended.
    *

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

@@ -1126,6 +1126,7 @@ import java.util.Map;
         playlistFormat.label,
         mimeType,
         codecs,
+        playlistFormat.metadata,
         bitrate,
         playlistFormat.width,
         playlistFormat.height,