libremetaverse/CSJ2K/j2k/codestream/reader/CBlkInfo.cs

/*
* CVS identifier:
*
* $Id: CBlkInfo.java,v 1.12 2001/09/14 08:32:15 grosbois Exp $
*
* Class:                   CBlkInfo
*
* Description:             Object containing code-block informations.
*
*
*
* COPYRIGHT:
* 
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
* 
* Copyright (c) 1999/2000 JJ2000 Partners.
* */
using System;
namespace CSJ2K.j2k.codestream.reader
{
	
	/// <summary> This class contains location of code-blocks' piece of codewords (there is
	/// one piece per layer) and some other information.
	/// 
	/// </summary>
	public class CBlkInfo
	{
		
		/// <summary>Upper-left x-coordinate of the code-block (relative to the tile) </summary>
		public int ulx;
		
		/// <summary>Upper-left y-coordinate of the code-block (relative to the tile) </summary>
		public int uly;
		
		/// <summary>Width of the code-block </summary>
		public int w;
		
		/// <summary>Height of the code-block </summary>
		public int h;
		
		/// <summary>The number of most significant bits which are skipped for this
		/// code-block (= Mb-1-bitDepth). 
		/// </summary>
		public int msbSkipped;
		
		/// <summary>Length of each piece of code-block's codewords </summary>
		public int[] len;
		
		/// <summary>Offset of each piece of code-block's codewords in the file </summary>
		public int[] off;
		
		/// <summary>The number of truncation point for each layer </summary>
		public int[] ntp;
		
		/// <summary>The cumulative number of truncation points </summary>
		public int ctp;
		
		/// <summary>The length of each segment (used with regular termination or in
		/// selective arithmetic bypass coding mode) 
		/// </summary>
		public int[][] segLen;
		
		/// <summary>Index of the packet where each layer has been found </summary>
		public int[] pktIdx;
		
		/// <summary> Constructs a new instance with specified number of layers and
		/// code-block coordinates. The number corresponds to the maximum piece of
		/// codeword for one code-block.
		/// 
		/// </summary>
		/// <param name="ulx">The uper-left x-coordinate
		/// 
		/// </param>
		/// <param name="uly">The uper-left y-coordinate
		/// 
		/// </param>
		/// <param name="w">Width of the code-block
		/// 
		/// </param>
		/// <param name="h">Height of the code-block
		/// 
		/// </param>
		/// <param name="nl">The number of layers
		/// 
		/// </param>
		public CBlkInfo(int ulx, int uly, int w, int h, int nl)
		{
			this.ulx = ulx;
			this.uly = uly;
			this.w = w;
			this.h = h;
			off = new int[nl];
			len = new int[nl];
			ntp = new int[nl];
			segLen = new int[nl][];
			pktIdx = new int[nl];
			for (int i = nl - 1; i >= 0; i--)
			{
				pktIdx[i] = - 1;
			}
		}
		
		/// <summary> Adds the number of new truncation for specified layer.
		/// 
		/// </summary>
		/// <param name="l">layer index
		/// 
		/// </param>
		/// <param name="newtp">Number of new truncation points 
		/// 
		/// </param>
		public virtual void  addNTP(int l, int newtp)
		{
			ntp[l] = newtp;
			ctp = 0;
			for (int lIdx = 0; lIdx <= l; lIdx++)
			{
				ctp += ntp[lIdx];
			}
		}
		
		/// <summary> Object information in a string.
		/// 
		/// </summary>
		/// <returns> Object information
		/// 
		/// </returns>
		public override System.String ToString()
		{
			System.String string_Renamed = "(ulx,uly,w,h)= (" + ulx + "," + uly + "," + w + "," + h;
			string_Renamed += (") " + msbSkipped + " MSB bit(s) skipped\n");
			if (len != null)
				for (int i = 0; i < len.Length; i++)
				{
					string_Renamed += ("\tl:" + i + ", start:" + off[i] + ", len:" + len[i] + ", ntp:" + ntp[i] + ", pktIdx=" + pktIdx[i]);
					if (segLen != null && segLen[i] != null)
					{
						string_Renamed += " { ";
						for (int j = 0; j < segLen[i].Length; j++)
							string_Renamed += (segLen[i][j] + " ");
						string_Renamed += "}";
					}
					string_Renamed += "\n";
				}
			string_Renamed += ("\tctp=" + ctp);
			return string_Renamed;
		}
	}
}