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.text;
  
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.decoder.OutputBuffer;
  import java.util.List;
  
  /**
   * Base class for {@link SubtitleDecoder} output buffers.
   */
  public abstract class SubtitleOutputBuffer extends OutputBuffer implements Subtitle {
  
    private Subtitle subtitle;
    private long subsampleOffsetUs;
  
    /**
     * Sets the content of the output buffer, consisting of a {@link Subtitle} and associated
     * metadata.
     *
     * @param timeUs The time of the start of the subtitle in microseconds.
     * @param subtitle The subtitle.
     * @param subsampleOffsetUs An offset that must be added to the subtitle's event times, or
     *     {@link Format#OFFSET_SAMPLE_RELATIVE} if {@code timeUs} should be added.
     */
    public void setContent(long timeUs, Subtitle subtitle, long subsampleOffsetUs) {
      this.timeUs = timeUs;
      this.subtitle = subtitle;
      this.subsampleOffsetUs = subsampleOffsetUs == Format.OFFSET_SAMPLE_RELATIVE ? this.timeUs
          : subsampleOffsetUs;
    }
  
    @Override
    public int getEventTimeCount() {
      return subtitle.getEventTimeCount();
    }
  
    @Override
    public long getEventTime(int index) {
      return subtitle.getEventTime(index) + subsampleOffsetUs;
    }
  
    @Override
    public int getNextEventTimeIndex(long timeUs) {
      return subtitle.getNextEventTimeIndex(timeUs - subsampleOffsetUs);
    }
  
    @Override
    public List<Cue> getCues(long timeUs) {
      return subtitle.getCues(timeUs - subsampleOffsetUs);
    }
  
    @Override
    public abstract void release();
  
    @Override
    public void clear() {
      super.clear();
      subtitle = null;
    }
  
  }
  