content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    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
   *
   *        https://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.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  package com.drew.metadata.mp4;
  
  import com.drew.lang.Rational;
  import com.drew.lang.annotations.NotNull;
  import com.drew.metadata.TagDescriptor;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  
  import static com.drew.metadata.mp4.Mp4Directory.*;
  
  public class Mp4Descriptor extends TagDescriptor<Mp4Directory> {
  
      public Mp4Descriptor(@NotNull Mp4Directory directory)
      {
          super(directory);
      }
  
      @Override
      public String getDescription(int tagType)
      {
          switch (tagType) {
              case TAG_MAJOR_BRAND:
                  return getMajorBrandDescription();
              case TAG_COMPATIBLE_BRANDS:
                  return getCompatibleBrandsDescription();
              case TAG_DURATION_SECONDS:
                  return getDurationDescription();
              default:
                  return _directory.getString(tagType);
          }
      }
  
      private String getMajorBrandDescription()
      {
          byte[] value = _directory.getByteArray(Mp4Directory.TAG_MAJOR_BRAND);
          if (value == null)
              return null;
          return Mp4Dictionary.lookup(TAG_MAJOR_BRAND, new String(value));
      }
  
      private String getCompatibleBrandsDescription()
      {
          String[] values = _directory.getStringArray(Mp4Directory.TAG_COMPATIBLE_BRANDS);
          if (values == null)
              return null;
  
          ArrayList<String> compatibleBrandsValues = new ArrayList<String>();
          for (String value : values) {
              String compatibleBrandsValue = Mp4Dictionary.lookup(TAG_MAJOR_BRAND, value);
              compatibleBrandsValues.add(compatibleBrandsValue == null ? value : compatibleBrandsValue);
          }
          return Arrays.toString(compatibleBrandsValues.toArray());
      }
  
      private String getDurationDescription()
      {
          Rational duration = _directory.getRational(TAG_DURATION_SECONDS);
          if (duration == null)
              return null;
  
          double value = duration.doubleValue();
          Integer hours = (int)(value / (Math.pow(60, 2)));
          Integer minutes = (int)((value / (Math.pow(60, 1))) - (hours * 60));
          Integer seconds = (int)Math.ceil((value / (Math.pow(60, 0))) - (minutes * 60));
          return String.format("%1$02d:%2$02d:%3$02d", hours, minutes, seconds);
      }
  }
  