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.source.hls;
  
  import android.util.SparseArray;
  import com.google.android.exoplayer2.util.TimestampAdjuster;
  
  /**
   * Provides {@link TimestampAdjuster} instances for use during HLS playbacks.
   */
  public final class TimestampAdjusterProvider {
  
    // TODO: Prevent this array from growing indefinitely large by removing adjusters that are no
    // longer required.
    private final SparseArray<TimestampAdjuster> timestampAdjusters;
  
    public TimestampAdjusterProvider() {
      timestampAdjusters = new SparseArray<>();
    }
  
    /**
     * Returns a {@link TimestampAdjuster} suitable for adjusting the pts timestamps contained in
     * a chunk with a given discontinuity sequence.
     *
     * @param discontinuitySequence The chunk's discontinuity sequence.
     * @return A {@link TimestampAdjuster}.
     */
    public TimestampAdjuster getAdjuster(int discontinuitySequence) {
      TimestampAdjuster adjuster = timestampAdjusters.get(discontinuitySequence);
      if (adjuster == null) {
        adjuster = new TimestampAdjuster(TimestampAdjuster.DO_NOT_OFFSET);
        timestampAdjusters.put(discontinuitySequence, adjuster);
      }
      return adjuster;
    }
  
    /**
     * Resets the provider.
     */
    public void reset() {
      timestampAdjusters.clear();
    }
  
  }
  