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;
  
  import com.drew.lang.Rational;
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.TagDescriptor;
  
  import static com.drew.metadata.exif.PanasonicRawDistortionDirectory.*;
  
  /**
   * Provides human-readable string representations of tag values stored in a {@link PanasonicRawDistortionDirectory}.
   *
   * @author Kevin Mott https://github.com/kwhopper
   * @author Drew Noakes https://drewnoakes.com
   */
  @SuppressWarnings("WeakerAccess")
  public class PanasonicRawDistortionDescriptor extends TagDescriptor<PanasonicRawDistortionDirectory>
  {
      public PanasonicRawDistortionDescriptor(@NotNull PanasonicRawDistortionDirectory directory)
      {
          super(directory);
      }
  
      @Override
      @Nullable
      public String getDescription(int tagType)
      {
          switch (tagType) {
              case TagDistortionParam02:
                  return getDistortionParam02Description();
              case TagDistortionParam04:
                  return getDistortionParam04Description();
              case TagDistortionScale:
                  return getDistortionScaleDescription();
              case TagDistortionCorrection:
                  return getDistortionCorrectionDescription();
              case TagDistortionParam08:
                  return getDistortionParam08Description();
              case TagDistortionParam09:
                  return getDistortionParam09Description();
              case TagDistortionParam11:
                  return getDistortionParam11Description();
              default:
                  return super.getDescription(tagType);
          }
      }
  
      @Nullable
      public String getDistortionParam02Description()
      {
          Integer value = _directory.getInteger(TagDistortionParam02);
          if (value == null)
              return null;
  
          return new Rational(value, 32678).toString();
      }
  
      @Nullable
      public String getDistortionParam04Description()
      {
          Integer value = _directory.getInteger(TagDistortionParam04);
          if (value == null)
              return null;
  
          return new Rational(value, 32678).toString();
      }
  
      @Nullable
      public String getDistortionScaleDescription()
      {
          Integer value = _directory.getInteger(TagDistortionScale);
          if (value == null)
              return null;
  
          //return (1 / (1 + value / 32768)).toString();
          return Integer.toString(1 / (1 + value / 32768));
      }
  
      @Nullable
      public String getDistortionCorrectionDescription()
      {
          Integer value = _directory.getInteger(TagDistortionCorrection);
          if (value == null)
              return null;
  
          // (have seen the upper 4 bits set for GF5 and GX1, giving a value of -4095 - PH)
          int mask = 0x000f;
          switch (value & mask)
          {
              case 0:
                  return "Off";
              case 1:
                  return "On";
              default:
                  return "Unknown (" + value + ")";
          }
      }
  
      @Nullable
      public String getDistortionParam08Description()
      {
          Integer value = _directory.getInteger(TagDistortionParam08);
          if (value == null)
              return null;
  
          return new Rational(value, 32678).toString();
      }
  
      @Nullable
      public String getDistortionParam09Description()
      {
          Integer value = _directory.getInteger(TagDistortionParam09);
          if (value == null)
              return null;
  
          return new Rational(value, 32678).toString();
      }
  
      @Nullable
      public String getDistortionParam11Description()
      {
          Integer value = _directory.getInteger(TagDistortionParam11);
          if (value == null)
              return null;
  
          return new Rational(value, 32678).toString();
      }
  }
  