diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 6158ea9e07..989d67a49a 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -22,6 +22,7 @@
     ([#3314](https://github.com/google/ExoPlayer/issues/3314)).
   * Update `TrackSelection.Factory` interface to support creating all track
     selections together.
+  * Allow to specify a selection reason for a `SelectionOverride`.
 * Do not retry failed loads whose error is `FileNotFoundException`.
 * Support Dolby Vision extraction in MP4 and fMP4.
 * Offline:
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
index 32e6a499cd..ba4dd6e8a9 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
@@ -242,7 +242,9 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
               createAdaptiveTrackSelection(definition.group, bandwidthMeter, definition.tracks);
           selections[i] = adaptiveSelection;
         } else {
-          selections[i] = new FixedTrackSelection(definition.group, definition.tracks[0]);
+          selections[i] =
+              new FixedTrackSelection(
+                  definition.group, definition.tracks[0], definition.reason, definition.data);
           int trackBitrate = definition.group.getFormat(definition.tracks[0]).bitrate;
           if (trackBitrate != Format.NO_VALUE) {
             totalFixedBandwidth += trackBitrate;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
index 0b510ea496..9852736e4d 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
@@ -1173,15 +1173,29 @@ public class DefaultTrackSelector extends MappingTrackSelector {
     public final int groupIndex;
     public final int[] tracks;
     public final int length;
+    public final int reason;
+    public final int data;
 
     /**
      * @param groupIndex The overriding track group index.
      * @param tracks The overriding track indices within the track group.
      */
     public SelectionOverride(int groupIndex, int... tracks) {
+      this(groupIndex, tracks, C.SELECTION_REASON_MANUAL, /* data= */ 0);
+    }
+
+    /**
+     * @param groupIndex The overriding track group index.
+     * @param tracks The overriding track indices within the track group.
+     * @param reason The reason for the override. One of the {@link C} SELECTION_REASON_ constants.
+     * @param data Optional data associated with this override.
+     */
+    public SelectionOverride(int groupIndex, int[] tracks, int reason, int data) {
       this.groupIndex = groupIndex;
       this.tracks = Arrays.copyOf(tracks, tracks.length);
       this.length = tracks.length;
+      this.reason = reason;
+      this.data = data;
       Arrays.sort(this.tracks);
     }
 
@@ -1190,6 +1204,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
       length = in.readByte();
       tracks = new int[length];
       in.readIntArray(tracks);
+      reason = in.readInt();
+      data = in.readInt();
     }
 
     /** Returns whether this override contains the specified track index. */
@@ -1204,7 +1220,9 @@ public class DefaultTrackSelector extends MappingTrackSelector {
 
     @Override
     public int hashCode() {
-      return 31 * groupIndex + Arrays.hashCode(tracks);
+      int hash = 31 * groupIndex + Arrays.hashCode(tracks);
+      hash = 31 * hash + reason;
+      return 31 * hash + data;
     }
 
     @Override
@@ -1216,7 +1234,10 @@ public class DefaultTrackSelector extends MappingTrackSelector {
         return false;
       }
       SelectionOverride other = (SelectionOverride) obj;
-      return groupIndex == other.groupIndex && Arrays.equals(tracks, other.tracks);
+      return groupIndex == other.groupIndex
+          && Arrays.equals(tracks, other.tracks)
+          && reason == other.reason
+          && data == other.data;
     }
 
     // Parcelable implementation.
@@ -1231,6 +1252,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
       dest.writeInt(groupIndex);
       dest.writeInt(tracks.length);
       dest.writeIntArray(tracks);
+      dest.writeInt(reason);
+      dest.writeInt(data);
     }
 
     public static final Parcelable.Creator<SelectionOverride> CREATOR =
@@ -1405,7 +1428,10 @@ public class DefaultTrackSelector extends MappingTrackSelector {
             override == null
                 ? null
                 : new TrackSelection.Definition(
-                    rendererTrackGroups.get(override.groupIndex), override.tracks);
+                    rendererTrackGroups.get(override.groupIndex),
+                    override.tracks,
+                    override.reason,
+                    override.data);
       }
     }
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelection.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelection.java
index e244bf4a8c..bd99403b07 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelection.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelection.java
@@ -43,6 +43,10 @@ public interface TrackSelection {
     public final TrackGroup group;
     /** The indices of the selected tracks in {@link #group}. */
     public final int[] tracks;
+    /** The track selection reason. One of the {@link C} SELECTION_REASON_ constants. */
+    public final int reason;
+    /** Optional data associated with this selection of tracks. */
+    @Nullable public final Object data;
 
     /**
      * @param group The {@link TrackGroup}. Must not be null.
@@ -50,8 +54,20 @@ public interface TrackSelection {
      *     null or empty. May be in any order.
      */
     public Definition(TrackGroup group, int... tracks) {
+      this(group, tracks, C.SELECTION_REASON_UNKNOWN, /* data= */ null);
+    }
+
+    /**
+     * @param group The {@link TrackGroup}. Must not be null.
+     * @param tracks The indices of the selected tracks within the {@link TrackGroup}. Must not be
+     * @param reason The track selection reason. One of the {@link C} SELECTION_REASON_ constants.
+     * @param data Optional data associated with this selection of tracks.
+     */
+    public Definition(TrackGroup group, int[] tracks, int reason, @Nullable Object data) {
       this.group = group;
       this.tracks = tracks;
+      this.reason = reason;
+      this.data = data;
     }
   }
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionUtil.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionUtil.java
index 3fd763157e..71afd87b0f 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionUtil.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionUtil.java
@@ -71,7 +71,9 @@ public final class TrackSelectionUtil {
         createdAdaptiveTrackSelection = true;
         selections[i] = adaptiveTrackSelectionFactory.createAdaptiveTrackSelection(definition);
       } else {
-        selections[i] = new FixedTrackSelection(definition.group, definition.tracks[0]);
+        selections[i] =
+            new FixedTrackSelection(
+                definition.group, definition.tracks[0], definition.reason, definition.data);
       }
     }
     return selections;