corrade-vassal – Rev 1
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/*
* CVS identifier:
*
* $Id: SynWTFilterSpec.java,v 1.15 2001/08/02 10:01:30 grosbois Exp $
*
* Class: SynWTFilterSpec
*
* Description: Synthesis filters specification
*
*
*
* 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;
using CSJ2K.j2k.util;
using CSJ2K.j2k;
namespace CSJ2K.j2k.wavelet.synthesis
{
/// <summary> This class extends ModuleSpec class for synthesis filters specification
/// holding purpose.
///
/// </summary>
/// <seealso cref="ModuleSpec">
///
/// </seealso>
public class SynWTFilterSpec:ModuleSpec
{
/// <summary> Constructs a new 'SynWTFilterSpec' for the specified number of
/// components and tiles.
///
/// </summary>
/// <param name="nt">The number of tiles
///
/// </param>
/// <param name="nc">The number of components
///
/// </param>
/// <param name="type">the type of the specification module i.e. tile specific,
/// component specific or both.
///
/// </param>
public SynWTFilterSpec(int nt, int nc, byte type):base(nt, nc, type)
{
}
/// <summary> Returns the data type used by the filters in this object, as defined in
/// the 'DataBlk' interface for specified tile-component.
///
/// </summary>
/// <param name="t">Tile index
///
/// </param>
/// <param name="c">Component index
///
/// </param>
/// <returns> The data type of the filters in this object
///
/// </returns>
/// <seealso cref="jj2000.j2k.image.DataBlk">
///
/// </seealso>
public virtual int getWTDataType(int t, int c)
{
SynWTFilter[][] an = (SynWTFilter[][]) getSpec(t, c);
return an[0][0].DataType;
}
/// <summary> Returns the horizontal analysis filters to be used in component 'n' and
/// tile 't'.
///
/// <p>The horizontal analysis filters are returned in an array of
/// SynWTFilter. Each element contains the horizontal filter for each
/// resolution level starting with resolution level 1 (i.e. the analysis
/// filter to go from resolution level 1 to resolution level 0). If there
/// are less elements than the maximum resolution level, then the last
/// element is assumed to be repeated.</p>
///
/// </summary>
/// <param name="t">The tile index, in raster scan order
///
/// </param>
/// <param name="c">The component index.
///
/// </param>
/// <returns> The array of horizontal analysis filters for component 'n' and
/// tile 't'.
///
/// </returns>
public virtual SynWTFilter[] getHFilters(int t, int c)
{
SynWTFilter[][] an = (SynWTFilter[][]) getSpec(t, c);
return an[0];
}
/// <summary> Returns the vertical analysis filters to be used in component 'n' and
/// tile 't'.
///
/// <p>The vertical analysis filters are returned in an array of
/// SynWTFilter. Each element contains the vertical filter for each
/// resolution level starting with resolution level 1 (i.e. the analysis
/// filter to go from resolution level 1 to resolution level 0). If there
/// are less elements than the maximum resolution level, then the last
/// element is assumed to be repeated.</p>
///
/// </summary>
/// <param name="t">The tile index, in raster scan order
///
/// </param>
/// <param name="c">The component index.
///
/// </param>
/// <returns> The array of horizontal analysis filters for component 'n' and
/// tile 't'.
///
/// </returns>
public virtual SynWTFilter[] getVFilters(int t, int c)
{
SynWTFilter[][] an = (SynWTFilter[][]) getSpec(t, c);
return an[1];
}
/// <summary>Debugging method </summary>
public override System.String ToString()
{
System.String str = "";
SynWTFilter[][] an;
str += ("nTiles=" + nTiles + "\nnComp=" + nComp + "\n\n");
for (int t = 0; t < nTiles; t++)
{
for (int c = 0; c < nComp; c++)
{
an = (SynWTFilter[][]) getSpec(t, c);
str += ("(t:" + t + ",c:" + c + ")\n");
// Horizontal filters
str += "\tH:";
for (int i = 0; i < an[0].Length; i++)
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.lang.Object.toString' may return a different value. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1043'"
str += (" " + an[0][i]);
}
// Horizontal filters
str += "\n\tV:";
for (int i = 0; i < an[1].Length; i++)
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.lang.Object.toString' may return a different value. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1043'"
str += (" " + an[1][i]);
}
str += "\n";
}
}
return str;
}
/// <summary> Check the reversibility of filters contained is the given
/// tile-component.
///
/// </summary>
/// <param name="t">The index of the tile
///
/// </param>
/// <param name="c">The index of the component
///
/// </param>
public virtual bool isReversible(int t, int c)
{
// Note: no need to buffer the result since this method is normally
// called once per tile-component.
SynWTFilter[] hfilter = getHFilters(t, c), vfilter = getVFilters(t, c);
// As soon as a filter is not reversible, false can be returned
for (int i = hfilter.Length - 1; i >= 0; i--)
if (!hfilter[i].Reversible || !vfilter[i].Reversible)
return false;
return true;
}
}
}
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