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.adobe;
  
  import com.drew.lang.annotations.NotNull;
  import com.drew.metadata.Directory;
  
  import java.util.HashMap;
  
  /**
   * Contains image encoding information for DCT filters, as stored by Adobe.
   */
  @SuppressWarnings("WeakerAccess")
  public class AdobeJpegDirectory extends Directory {
  
      public static final int TAG_DCT_ENCODE_VERSION = 0;
      /**
       * The convention for TAG_APP14_FLAGS0 and TAG_APP14_FLAGS1 is that 0 bits are benign.
       * 1 bits in TAG_APP14_FLAGS0 pass information that is possibly useful but not essential for decoding.
       * <p>
       * 0x8000 bit: Encoder used Blend=1 downsampling
       */
      public static final int TAG_APP14_FLAGS0 = 1;
      /**
       * The convention for TAG_APP14_FLAGS0 and TAG_APP14_FLAGS1 is that 0 bits are benign.
       * 1 bits in TAG_APP14_FLAGS1 pass information essential for decoding. DCTDecode could reject a compressed
       * image, if there are 1 bits in TAG_APP14_FLAGS1 or color transform codes that it cannot interpret.
       */
      public static final int TAG_APP14_FLAGS1 = 2;
      public static final int TAG_COLOR_TRANSFORM = 3;
  
      private static final HashMap<Integer, String> _tagNameMap = new HashMap<Integer, String>();
  
      static {
          _tagNameMap.put(TAG_DCT_ENCODE_VERSION, "DCT Encode Version");
          _tagNameMap.put(TAG_APP14_FLAGS0, "Flags 0");
          _tagNameMap.put(TAG_APP14_FLAGS1, "Flags 1");
          _tagNameMap.put(TAG_COLOR_TRANSFORM, "Color Transform");
      }
  
      public AdobeJpegDirectory() {
          this.setDescriptor(new AdobeJpegDescriptor(this));
      }
  
      @NotNull
      @Override
      public String getName() {
          return "Adobe JPEG";
      }
  
      @NotNull
      @Override
      protected HashMap<Integer, String> getTagNameMap() {
          return _tagNameMap;
      }
  }
  