75 lines
2.1 KiB
Java
75 lines
2.1 KiB
Java
//******************************************************************************
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//
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// File: acTLChunk.java
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// Package: edu.rit.image.png
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// Unit: Class edu.rit.image.png.acTLChunk
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//
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// This Java source file is copyright (C) 2013 by Alan Kaminsky. All rights
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// reserved. For further information, contact the author, Alan Kaminsky, at
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// ark@cs.rit.edu.
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//
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// This Java source file is part of the Parallel Java 2 Library ("PJ2"). PJ2 is
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// free software; you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation;
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// either version 3 of the License, or (at your option) any later version.
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//
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// PJ2 is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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//
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// A copy of the GNU General Public License is provided in the file gpl.txt. You
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// may also obtain a copy of the GNU General Public License on the World Wide
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// Web at http://www.gnu.org/licenses/gpl.html.
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//
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//******************************************************************************
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package edu.rit.image.png;
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import edu.rit.util.Packing;
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/**
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* Class acTLChunk provides an animation control chunk stored in an APNG file.
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*
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* @author Alan Kaminsky
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* @version 28-Jun-2013
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*/
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public class acTLChunk
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extends Chunk
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{
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// Exported constructors.
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/**
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* Construct a new uninitialized acTL chunk. This constructor is for use
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* only by object deserialization.
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*/
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public acTLChunk()
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{
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super();
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}
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/**
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* Construct a new acTL chunk.
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*
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* @param numFrames Number of frames.
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* @param numPlays Number of plays. 0 = infinite looping.
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*/
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public acTLChunk
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(int numFrames,
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int numPlays)
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{
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super (0x6163544c, getData (numFrames, numPlays));
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}
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private static byte[] getData
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(int numFrames,
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int numPlays)
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{
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byte[] data = new byte [8];
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Packing.unpackIntBigEndian (numFrames, data, 0);
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Packing.unpackIntBigEndian (numPlays, data, 4);
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return data;
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}
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}
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