content: /*
   * Copyright (C) 2016 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.trackselection;
  
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.source.TrackGroup;
  import com.google.android.exoplayer2.source.chunk.MediaChunk;
  import com.google.android.exoplayer2.source.chunk.MediaChunkIterator;
  import java.util.List;
  
  /** A {@link TrackSelection} consisting of a single track. */
  public final class FixedTrackSelection extends BaseTrackSelection {
  
    private final @C.SelectionReason int reason;
    @Nullable private final Object data;
  
    /**
     * @param group The {@link TrackGroup}. Must not be null.
     * @param track The index of the selected track within the {@link TrackGroup}.
     */
    public FixedTrackSelection(TrackGroup group, int track) {
      this(group, /* track= */ track, /* type= */ TrackSelection.TYPE_UNSET);
    }
  
    /**
     * @param group The {@link TrackGroup}. Must not be null.
     * @param track The index of the selected track within the {@link TrackGroup}.
     * @param type The type that will be returned from {@link TrackSelection#getType()}.
     */
    public FixedTrackSelection(TrackGroup group, int track, @Type int type) {
      this(group, track, type, C.SELECTION_REASON_UNKNOWN, /* data= */ null);
    }
  
    /**
     * @param group The {@link TrackGroup}. Must not be null.
     * @param track The index of the selected track within the {@link TrackGroup}.
     * @param type The type that will be returned from {@link TrackSelection#getType()}.
     * @param reason A reason for the track selection.
     * @param data Optional data associated with the track selection.
     */
    public FixedTrackSelection(
        TrackGroup group,
        int track,
        @Type int type,
        @C.SelectionReason int reason,
        @Nullable Object data) {
      super(group, /* tracks= */ new int[] {track}, type);
      this.reason = reason;
      this.data = data;
    }
  
    @Override
    public void updateSelectedTrack(
        long playbackPositionUs,
        long bufferedDurationUs,
        long availableDurationUs,
        List<? extends MediaChunk> queue,
        MediaChunkIterator[] mediaChunkIterators) {
      // Do nothing.
    }
  
    @Override
    public int getSelectedIndex() {
      return 0;
    }
  
    @Override
    public @C.SelectionReason int getSelectionReason() {
      return reason;
    }
  
    @Override
    @Nullable
    public Object getSelectionData() {
      return data;
    }
  }
  