org.apache.commons.imaging.formats.jpeg.segments.App14Segment Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.commons.imaging.formats.jpeg.segments;
import static org.apache.commons.imaging.common.BinaryFunctions.startsWith;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
/**
* http://www.aiim.org/documents/standards/PDF-Ref/References/Adobe/5116.DCT_Filter.pdf
*/
public class App14Segment extends AppnSegment {
private static final byte[] ADOBE_PREFIX;
public static final int ADOBE_COLOR_TRANSFORM_UNKNOWN = 0;
public static final int ADOBE_COLOR_TRANSFORM_YCbCr = 1;
public static final int ADOBE_COLOR_TRANSFORM_YCCK = 2;
static {
ADOBE_PREFIX = "Adobe".getBytes(StandardCharsets.US_ASCII);
}
public App14Segment(final int marker, final byte[] segmentData) throws IOException {
this(marker, segmentData.length, new ByteArrayInputStream(segmentData));
}
public App14Segment(final int marker, final int markerLength, final InputStream is) throws IOException {
super(marker, markerLength, is);
}
public boolean isAdobeJpegSegment() {
return startsWith(getSegmentData(), ADOBE_PREFIX);
}
public int getAdobeColorTransform() {
return 0xff & getSegmentData(11);
}
}