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/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* 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;
}
}
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