JPEGData.java :  » Graphic-Library » LaTeXDraw-2.0.8 » net » sourceforge » jiu » codecs » jpeg » Java Open Source

/*
 * JPEGData
 *
 * Copyright (c) 2005, 2006 Marco Schmidt.
 * All rights reserved.
 */
package net.sourceforge.jiu.codecs.jpeg;

import java.util.Vector;

/**
 * Data for decoding or encoding images from or to 
 * JPEG File Interchange Format (JFIF) files.
 * @author Marco Schmidt
 * @since 0.13.0
 */
public class JPEGData
{
  private JPEGFrame frame;
  private Vector huffmanTables = new Vector();
  private Vector quantTables = new Vector();
  private Vector scans = new Vector();

  public void addQuantizationTable(JPEGQuantizationTable table)
  {
    quantTables.add(table);
  }

  public void addHuffmanTable(JPEGHuffmanTable table)
  {
    huffmanTables.add(table);
  }

  public void addScan(JPEGScan scan)
  {
    scans.add(scan);
  }

  public JPEGFrame getFrame()
  {
    return frame;
  }

  /**
   * Return a quantization table with a given id or
   * null on failure to find it.
   * @param id integer id value of table
   * @return actual table or null on failure
   */
  public JPEGQuantizationTable getQuantizationTable(int id)
  {
    JPEGQuantizationTable table = null;
    int index = 0;
    while (index < quantTables.size())
    {
      table = (JPEGQuantizationTable)quantTables.elementAt(index++);
      if (table.getId() == id)
      {
        return table;
      }
    }
    return null;
  }

  public void setFrame(JPEGFrame newFrame)
  {
    frame = newFrame;
  }
}