Allow the app to specify extra ad markers

Issue: #3184

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=165895259

library/ui/src/main/java/com/google/android/exoplayer2/ui/PlaybackControlView.java

@@ -22,6 +22,7 @@ import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.os.SystemClock;
+import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
@@ -312,6 +313,8 @@ public class PlaybackControlView extends FrameLayout {
   private long hideAtMs;
   private long[] adGroupTimesMs;
   private boolean[] playedAdGroups;
+  private long[] extraAdGroupTimesMs;
+  private boolean[] extraPlayedAdGroups;
 
   private final Runnable updateProgressAction = new Runnable() {
     @Override
@@ -364,6 +367,8 @@ public class PlaybackControlView extends FrameLayout {
     formatter = new Formatter(formatBuilder, Locale.getDefault());
     adGroupTimesMs = new long[0];
     playedAdGroups = new boolean[0];
+    extraAdGroupTimesMs = new long[0];
+    extraPlayedAdGroups = new boolean[0];
     componentListener = new ComponentListener();
     controlDispatcher = DEFAULT_CONTROL_DISPATCHER;
 
@@ -463,6 +468,29 @@ public class PlaybackControlView extends FrameLayout {
   }
 
   /**
+   * Sets the millisecond positions of extra ad markers relative to the start of the window (or
+   * timeline, if in multi-window mode) and whether each extra ad has been played or not. The
+   * markers are shown in addition to any ad markers for ads in the player's timeline.
+   *
+   * @param extraAdGroupTimesMs The millisecond timestamps of the extra ad markers to show, or
+   *     {@code null} to show no extra ad markers.
+   * @param extraPlayedAdGroups Whether each ad has been played, or {@code null} to show no extra ad
+   *     markers.
+   */
+  public void setExtraAdGroupMarkers(@Nullable long[] extraAdGroupTimesMs,
+      @Nullable boolean[] extraPlayedAdGroups) {
+    if (extraAdGroupTimesMs == null) {
+      this.extraAdGroupTimesMs = new long[0];
+      this.extraPlayedAdGroups = new boolean[0];
+    } else {
+      Assertions.checkArgument(extraAdGroupTimesMs.length == extraPlayedAdGroups.length);
+      this.extraAdGroupTimesMs = extraAdGroupTimesMs;
+      this.extraPlayedAdGroups = extraPlayedAdGroups;
+    }
+    updateProgress();
+  }
+
+  /**
    * Sets the {@link VisibilityListener}.
    *
    * @param listener The listener to be notified about visibility changes.
@@ -768,7 +796,15 @@ public class PlaybackControlView extends FrameLayout {
         bufferedPosition += player.getBufferedPosition();
       }
       if (timeBar != null) {
-        timeBar.setAdGroupTimesMs(adGroupTimesMs, playedAdGroups, adGroupCount);
+        int extraAdGroupCount = extraAdGroupTimesMs.length;
+        int totalAdGroupCount = adGroupCount + extraAdGroupCount;
+        if (totalAdGroupCount > adGroupTimesMs.length) {
+          adGroupTimesMs = Arrays.copyOf(adGroupTimesMs, totalAdGroupCount);
+          playedAdGroups = Arrays.copyOf(playedAdGroups, totalAdGroupCount);
+        }
+        System.arraycopy(extraAdGroupTimesMs, 0, adGroupTimesMs, adGroupCount, extraAdGroupCount);
+        System.arraycopy(extraPlayedAdGroups, 0, playedAdGroups, adGroupCount, extraAdGroupCount);
+        timeBar.setAdGroupTimesMs(adGroupTimesMs, playedAdGroups, totalAdGroupCount);
       }
     }
     if (durationView != null) {