content: /*
   * Copyright (C) 2017 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.dvb;
  
  import com.google.android.exoplayer2.text.SimpleSubtitleDecoder;
  import com.google.android.exoplayer2.util.ParsableByteArray;
  import java.util.List;
  
  /** A {@link SimpleSubtitleDecoder} for DVB subtitles. */
  public final class DvbDecoder extends SimpleSubtitleDecoder {
  
    private final DvbParser parser;
  
    /**
     * @param initializationData The initialization data for the decoder. The initialization data
     *     must consist of a single byte array containing 5 bytes: flag_pes_stripped (1),
     *     composition_page (2), ancillary_page (2).
     */
    public DvbDecoder(List<byte[]> initializationData) {
      super("DvbDecoder");
      ParsableByteArray data = new ParsableByteArray(initializationData.get(0));
      int subtitleCompositionPage = data.readUnsignedShort();
      int subtitleAncillaryPage = data.readUnsignedShort();
      parser = new DvbParser(subtitleCompositionPage, subtitleAncillaryPage);
    }
  
    @Override
    protected DvbSubtitle decode(byte[] data, int length, boolean reset) {
      if (reset) {
        parser.reset();
      }
      return new DvbSubtitle(parser.decode(data, length));
    }
  
  }
  