Add support for adding XMP data via transformer

PiperOrigin-RevId: 534801202
(cherry picked from commit be6f5e437828ba92d1046c375a977c3a1d58a3ad)

library/container/src/main/java/com/google/android/exoplayer2/container/XmpData.java

+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer2.container;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.metadata.Metadata;
+import com.google.android.exoplayer2.util.Util;
+import java.util.Arrays;
+
+/** Stores XMP data. */
+public final class XmpData implements Metadata.Entry {
+  public final byte[] data;
+
+  /** Creates an instance. */
+  public XmpData(byte[] data) {
+    this.data = data;
+  }
+
+  private XmpData(Parcel in) {
+    this.data = Util.castNonNull(in.createByteArray());
+  }
+
+  @Override
+  public boolean equals(@Nullable Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+
+    return Arrays.equals(data, ((XmpData) obj).data);
+  }
+
+  @Override
+  public int hashCode() {
+    return Arrays.hashCode(data);
+  }
+
+  @Override
+  public String toString() {
+    return "XMP: " + Util.toHexString(data);
+  }
+
+  // Parcelable implementation.
+
+  @Override
+  public int describeContents() {
+    return 0;
+  }
+
+  @Override
+  public void writeToParcel(Parcel dest, int flags) {
+    dest.writeByteArray(data);
+  }
+
+  public static final Parcelable.Creator<XmpData> CREATOR =
+      new Parcelable.Creator<XmpData>() {
+
+        @Override
+        public XmpData createFromParcel(Parcel in) {
+          return new XmpData(in);
+        }
+
+        @Override
+        public XmpData[] newArray(int size) {
+          return new XmpData[size];
+        }
+      };
+}

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/InAppMuxer.java

@@ -22,6 +22,7 @@ import android.media.MediaCodec.BufferInfo;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.container.Mp4LocationData;
+import com.google.android.exoplayer2.container.XmpData;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.muxer.Mp4Muxer;
 import com.google.android.exoplayer2.muxer.Mp4Muxer.TrackToken;
@@ -44,15 +45,16 @@ public final class InAppMuxer implements Muxer {
   public interface MetadataProvider {
 
     /**
-     * Updates the list of {@link Metadata.Entry metadata entries}.
+     * Updates the list of {@linkplain Metadata.Entry metadata entries}.
      *
      * <p>A {@link Metadata.Entry} can be added or removed. To modify an existing {@link
      * Metadata.Entry}, first remove it and then add a new one.
      *
-     * <p>List of supported {@link Metadata.Entry}:
+     * <p>List of supported {@linkplain Metadata.Entry metadata entries}:
      *
      * <ul>
      *   <li>{@link Mp4LocationData}
+     *   <li>{@link XmpData}
      * </ul>
      */
     void updateMetadataEntries(Set<Metadata.Entry> metadataEntries);
@@ -175,7 +177,7 @@ public final class InAppMuxer implements Muxer {
       Metadata.Entry entry = metadata.get(i);
       // Keep only supported metadata.
       // LINT.IfChange(added_metadata)
-      if (entry instanceof Mp4LocationData) {
+      if (entry instanceof Mp4LocationData || entry instanceof XmpData) {
         metadataEntries.add(entry);
       }
     }
@@ -183,13 +185,6 @@ public final class InAppMuxer implements Muxer {
 
   @Override
   public void release(boolean forCancellation) throws MuxerException {
-    if (metadataProvider != null) {
-      Set<Metadata.Entry> metadataEntriesCopy = new LinkedHashSet<>(metadataEntries);
-      metadataProvider.updateMetadataEntries(metadataEntriesCopy);
-      metadataEntries.clear();
-      metadataEntries.addAll(metadataEntriesCopy);
-    }
-
     writeMetadata();
 
     try {
@@ -205,11 +200,22 @@ public final class InAppMuxer implements Muxer {
   }
 
   private void writeMetadata() {
+    if (metadataProvider != null) {
+      Set<Metadata.Entry> metadataEntriesCopy = new LinkedHashSet<>(metadataEntries);
+      metadataProvider.updateMetadataEntries(metadataEntriesCopy);
+      metadataEntries.clear();
+      metadataEntries.addAll(metadataEntriesCopy);
+    }
+
     for (Metadata.Entry entry : metadataEntries) {
       // LINT.IfChange(written_metadata)
       if (entry instanceof Mp4LocationData) {
         mp4Muxer.setLocation(
             ((Mp4LocationData) entry).latitude, ((Mp4LocationData) entry).longitude);
+      } else if (entry instanceof XmpData) {
+        mp4Muxer.addXmp(ByteBuffer.wrap(((XmpData) entry).data));
+      } else {
+        throw new IllegalStateException("Unsupported Metadata.Entry " + entry.getClass().getName());
       }
     }
   }

library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerWithInAppMuxerEndToEndTest.java

@@ -16,6 +16,7 @@
 package com.google.android.exoplayer2.transformer;
 
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
+import static com.google.common.truth.Truth.assertThat;
 
 import android.content.Context;
 import android.net.Uri;
@@ -23,13 +24,13 @@ import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.container.Mp4LocationData;
+import com.google.android.exoplayer2.container.XmpData;
 import com.google.android.exoplayer2.extractor.mp4.Mp4Extractor;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.testutil.DumpFileAsserts;
 import com.google.android.exoplayer2.testutil.FakeClock;
 import com.google.android.exoplayer2.testutil.FakeExtractorOutput;
 import com.google.android.exoplayer2.util.Util;
-import com.google.common.collect.ImmutableList;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import org.junit.After;
@@ -42,6 +43,7 @@ import org.junit.runner.RunWith;
 public class TransformerWithInAppMuxerEndToEndTest {
   private static final String MP4_FILE_ASSET_DIRECTORY = "asset:///media/";
   private static final String H264_MP4 = "mp4/sample.mp4";
+  private static final String XMP_SAMPLE_DATA = "media/xmp/sample_datetime_xmp.xmp";
   private Context context;
   private String outputPath;
 
@@ -58,7 +60,6 @@ public class TransformerWithInAppMuxerEndToEndTest {
 
   @Test
   public void transmux_withLocationMetadata_outputMatchedExpected() throws Exception {
-    String outputPath = Util.createTempFile(context, "TransformerTest").getPath();
     Muxer.Factory inAppMuxerFactory =
         new InAppMuxer.Factory(
             DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS,
@@ -72,15 +73,8 @@ public class TransformerWithInAppMuxerEndToEndTest {
             .setMuxerFactory(inAppMuxerFactory)
             .build();
     MediaItem mediaItem = MediaItem.fromUri(Uri.parse(MP4_FILE_ASSET_DIRECTORY + H264_MP4));
-    EditedMediaItem editedMediaItem =
-        new EditedMediaItem.Builder(mediaItem)
-            .setEffects(
-                new Effects(
-                    /* audioProcessors= */ ImmutableList.of(),
-                    /* videoEffects= */ ImmutableList.of()))
-            .build();
 
-    transformer.start(editedMediaItem, outputPath);
+    transformer.start(mediaItem, outputPath);
     TransformerTestRunner.runLooper(transformer);
 
     FakeExtractorOutput fakeExtractorOutput =
@@ -92,4 +86,26 @@ public class TransformerWithInAppMuxerEndToEndTest {
         fakeExtractorOutput,
         TestUtil.getDumpFileName(H264_MP4 + ".with_location_metadata"));
   }
+
+  @Test
+  public void transmux_withXmpData_completesSuccessfully() throws Exception {
+    byte[] xmpData =
+        com.google.android.exoplayer2.testutil.TestUtil.getByteArray(context, XMP_SAMPLE_DATA);
+    Muxer.Factory inAppMuxerFactory =
+        new InAppMuxer.Factory(
+            DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS,
+            metadataEntries -> metadataEntries.add(new XmpData(xmpData)));
+    Transformer transformer =
+        new Transformer.Builder(context)
+            .setClock(new FakeClock(/* isAutoAdvancing= */ true))
+            .setMuxerFactory(inAppMuxerFactory)
+            .build();
+    MediaItem mediaItem = MediaItem.fromUri(Uri.parse(MP4_FILE_ASSET_DIRECTORY + H264_MP4));
+
+    transformer.start(mediaItem, outputPath);
+    ExportResult exportResult = TransformerTestRunner.runLooper(transformer);
+
+    // TODO(b/270956881): Use FakeExtractorOutput once it starts dumping uuid box.
+    assertThat(exportResult.exportException).isNull();
+  }
 }