| /* |
| * 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.sanselan.formats.jpeg.segments; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.sanselan.ImageReadException; |
| import org.apache.commons.sanselan.formats.jpeg.JpegImageParser; |
| |
| public class SofnSegment extends Segment |
| { |
| public final int width, height; |
| public final int numberOfComponents; |
| public final int precision; |
| public final Component[] components; |
| |
| public static class Component |
| { |
| public final int componentIdentifier; |
| public final int horizontalSamplingFactor; |
| public final int verticalSamplingFactor; |
| public final int quantTabDestSelector; |
| |
| public Component(int componentIdentifier, |
| int horizontalSamplingFactor, |
| int veritcalSamplingFactor, |
| int quantTabDestSelector) |
| { |
| this.componentIdentifier = componentIdentifier; |
| this.horizontalSamplingFactor = horizontalSamplingFactor; |
| this.verticalSamplingFactor = veritcalSamplingFactor; |
| this.quantTabDestSelector = quantTabDestSelector; |
| } |
| } |
| |
| public SofnSegment(int marker, byte segmentData[]) |
| throws ImageReadException, IOException |
| { |
| this(marker, segmentData.length, new ByteArrayInputStream(segmentData)); |
| } |
| |
| public SofnSegment(int marker, int marker_length, InputStream is) |
| throws ImageReadException, IOException |
| { |
| super(marker, marker_length); |
| |
| if (getDebug()) |
| System.out.println("SOF0Segment marker_length: " + marker_length); |
| |
| precision = readByte("Data_precision", is, "Not a Valid JPEG File"); |
| height = read2Bytes("Image_height", is, "Not a Valid JPEG File"); |
| width = read2Bytes("Image_Width", is, "Not a Valid JPEG File"); |
| numberOfComponents = readByte("Number_of_components", is, |
| "Not a Valid JPEG File"); |
| components = new Component[numberOfComponents]; |
| for (int i = 0; i < numberOfComponents; i++) |
| { |
| int componentIdentifier = readByte("ComponentIdentifier", is, |
| "Not a Valid JPEG File"); |
| |
| int hvSamplingFactors = readByte("SamplingFactors", is, |
| "Not a Valid JPEG File"); |
| int horizontalSamplingFactor = (hvSamplingFactors >> 4) & 0xf; |
| int verticalSamplingFactor = hvSamplingFactors & 0xf; |
| int quantTabDestSelector = readByte("QuantTabDestSel", is, |
| "Not a Valid JPEG File"); |
| components[i] = new Component(componentIdentifier, |
| horizontalSamplingFactor, verticalSamplingFactor, |
| quantTabDestSelector); |
| } |
| |
| if (getDebug()) |
| System.out.println(""); |
| } |
| |
| @Override |
| public String getDescription() |
| { |
| return "SOFN (SOF" + (marker - JpegImageParser.SOF0Marker) + ") (" |
| + getSegmentType() + ")"; |
| } |
| |
| } |