Add SEF based test to MetadataRetrieverTest

PiperOrigin-RevId: 339885432

library/core/src/test/java/com/google/android/exoplayer2/MetadataRetrieverTest.java

@@ -26,9 +26,12 @@ import android.os.SystemClock;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.metadata.mp4.MotionPhotoMetadata;
+import com.google.android.exoplayer2.metadata.mp4.SlowMotionData;
 import com.google.android.exoplayer2.source.TrackGroupArray;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.common.util.concurrent.ListenableFuture;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.ExecutionException;
 import org.junit.Before;
 import org.junit.Test;
@@ -125,6 +128,34 @@ public class MetadataRetrieverTest {
   }
 
   @Test
+  public void retrieveMetadata_sefSlowMotion_outputsExpectedMetadata() throws Exception {
+    MediaItem mediaItem =
+        MediaItem.fromUri(Uri.parse("asset://android_asset/media/mp4/sample_sef_slow_motion.mp4"));
+    List<SlowMotionData.Segment> segments = new ArrayList<>();
+    segments.add(
+        new SlowMotionData.Segment(
+            /* startTimeMs= */ 88, /* endTimeMs= */ 879, /* speedDivisor= */ 2));
+    segments.add(
+        new SlowMotionData.Segment(
+            /* startTimeMs= */ 1255, /* endTimeMs= */ 1970, /* speedDivisor= */ 8));
+    SlowMotionData expectedSlowMotionData = new SlowMotionData(segments);
+
+    ListenableFuture<TrackGroupArray> trackGroupsFuture = retrieveMetadata(context, mediaItem);
+    TrackGroupArray trackGroups = waitAndGetTrackGroups(trackGroupsFuture);
+
+    assertThat(trackGroups.length).isEqualTo(2); // Video and audio
+
+    // Audio
+    assertThat(trackGroups.get(0).getFormat(0).metadata.length()).isEqualTo(1);
+    assertThat(trackGroups.get(0).getFormat(0).metadata.get(0)).isEqualTo(expectedSlowMotionData);
+
+    // Video
+    assertThat(trackGroups.get(1).getFormat(0).metadata.length())
+        .isEqualTo(3); // 2 Mdta entries and 1 slow motion entry.
+    assertThat(trackGroups.get(1).getFormat(0).metadata.get(2)).isEqualTo(expectedSlowMotionData);
+  }
+
+  @Test
   public void retrieveMetadata_invalidMediaItem_throwsError() {
     MediaItem mediaItem =
         MediaItem.fromUri(Uri.parse("asset://android_asset/media/does_not_exist"));