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.exif.makernotes;
  
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.MetadataException;
  import com.drew.metadata.TagDescriptor;
  
  /**
   * @author Bob Johnson
   */
  public class AppleRunTimeMakernoteDescriptor extends TagDescriptor<AppleRunTimeMakernoteDirectory>
  {
      public AppleRunTimeMakernoteDescriptor(AppleRunTimeMakernoteDirectory directory)
      {
          super(directory);
      }
  
      @Override
      @Nullable
      public String getDescription(int tagType)
      {
          switch (tagType) {
              case AppleRunTimeMakernoteDirectory.CMTimeFlags:
                  return getFlagsDescription();
              case AppleRunTimeMakernoteDirectory.CMTimeValue:
                  return getValueDescription();
              default:
                  return super.getDescription(tagType);
          }
      }
  
      // flags bitmask details
      // 0000 0001 = Valid
      // 0000 0010 = Rounded
      // 0000 0100 = Positive Infinity
      // 0000 1000 = Negative Infinity
      // 0001 0000 = Indefinite
      @Nullable
      public String getFlagsDescription()
      {
          try {
              final int value = _directory.getInt(AppleRunTimeMakernoteDirectory.CMTimeFlags);
  
              StringBuilder sb = new StringBuilder();
  
              if ((value & 0x1) == 1)
                  sb.append("Valid");
              else
                  sb.append("Invalid");
  
              if ((value & 0x2) != 0)
                  sb.append(", rounded");
  
              if ((value & 0x4) != 0)
                  sb.append(", positive infinity");
  
              if ((value & 0x8) != 0)
                  sb.append(", negative infinity");
  
              if ((value & 0x10) != 0)
                  sb.append(", indefinite");
  
              return sb.toString();
          } catch (MetadataException ignored) {
              return null;
          }
      }
  
      @Nullable
      public String getValueDescription()
      {
          try {
              long value = _directory.getLong(AppleRunTimeMakernoteDirectory.CMTimeValue);
              long scale = _directory.getLong(AppleRunTimeMakernoteDirectory.CMTimeScale);
  
              return String.format("%d seconds", (value / scale));
          } catch (MetadataException ignored) {
              return null;
          }
      }
  }
  