com.lizardtech.djvu
Class JB2Codec

java.lang.Object
  com.lizardtech.djvu.DjVuObject
      com.lizardtech.djvu.JB2Codec

All Implemented Interfaces:

DjVuInterface

Direct Known Subclasses:

JB2Decode

public abstract class JB2Codec
extends DjVuObject

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Version:

$Revision: 1.6 $

Author:

$author$

Field Summary

protected NumContext	abs_loc_x DOCUMENT ME!
protected NumContext	abs_loc_y DOCUMENT ME!
protected NumContext	abs_size_x DOCUMENT ME!
protected NumContext	abs_size_y DOCUMENT ME!
protected static int	BIGNEGATIVE DOCUMENT ME!
protected static int	BIGPOSITIVE DOCUMENT ME!
protected java.util.Vector	bitcells DOCUMENT ME!
protected byte[]	bitdist DOCUMENT ME!
protected byte[]	cbitdist DOCUMENT ME!
protected NumContext	dist_comment_byte DOCUMENT ME!
protected NumContext	dist_comment_length DOCUMENT ME!
protected NumContext	dist_match_index DOCUMENT ME!
protected NumContext	dist_record_type DOCUMENT ME!
protected BitContext	dist_refinement_flag DOCUMENT ME!
protected static byte	END_OF_DATA DOCUMENT ME!
protected boolean	gotstartrecordp DOCUMENT ME!
protected int	image_columns DOCUMENT ME!
protected int	image_rows DOCUMENT ME!
protected NumContext	image_size_dist DOCUMENT ME!
protected NumContext	inherited_shape_count_dist DOCUMENT ME!
protected int	last_bottom DOCUMENT ME!
protected int	last_left DOCUMENT ME!
protected int	last_right DOCUMENT ME!
protected int	last_row_bottom DOCUMENT ME!
protected int	last_row_left DOCUMENT ME!
protected java.util.Vector	leftcell DOCUMENT ME!
protected java.util.Vector	lib2shape DOCUMENT ME!
protected java.util.Vector	libinfo DOCUMENT ME!
protected static byte	MATCHED_COPY DOCUMENT ME!
protected static byte	MATCHED_REFINE DOCUMENT ME!
protected static byte	MATCHED_REFINE_IMAGE_ONLY DOCUMENT ME!
protected static byte	MATCHED_REFINE_LIBRARY_ONLY DOCUMENT ME!
protected static java.lang.Integer	MINUS_ONE_OBJECT DOCUMENT ME!
protected static byte	NEW_MARK DOCUMENT ME!
protected static byte	NEW_MARK_IMAGE_ONLY DOCUMENT ME!
protected static byte	NEW_MARK_LIBRARY_ONLY DOCUMENT ME!
protected static byte	NON_MARK_DATA DOCUMENT ME!
protected BitContext	offset_type_dist DOCUMENT ME!
protected static byte	PRESERVED_COMMENT DOCUMENT ME!
protected boolean	refinementp DOCUMENT ME!
protected NumContext	rel_loc_x_current DOCUMENT ME!
protected NumContext	rel_loc_x_last DOCUMENT ME!
protected NumContext	rel_loc_y_current DOCUMENT ME!
protected NumContext	rel_loc_y_last DOCUMENT ME!
protected NumContext	rel_size_x DOCUMENT ME!
protected NumContext	rel_size_y DOCUMENT ME!
protected static byte	REQUIRED_DICT_OR_RESET DOCUMENT ME!
protected java.util.Vector	rightcell DOCUMENT ME!
protected java.util.Vector	shape2lib DOCUMENT ME!
protected int[]	short_list DOCUMENT ME!
protected int	short_list_pos DOCUMENT ME!
protected static byte	START_OF_DATA DOCUMENT ME!

Fields inherited from class com.lizardtech.djvu.DjVuObject

hasReferences

Constructor Summary

protected

JB2Codec(boolean encoding) Creates a new JB2Codec object.

Method Summary

protected int	add_library(int shapeno, com.lizardtech.djvu.JB2Shape jshp) DOCUMENT ME!
protected abstract void	code_absolute_location(com.lizardtech.djvu.JB2Blit jblt, int rows, int columns) DOCUMENT ME!
protected void	code_absolute_mark_size(GBitmap bm) DOCUMENT ME!
protected abstract void	code_absolute_mark_size(GBitmap bm, int border) DOCUMENT ME!
protected void	code_bitmap_by_cross_coding(GBitmap bm, GBitmap cbm, int libno) DOCUMENT ME!
protected abstract void	code_bitmap_by_cross_coding(GBitmap bm, GBitmap cbm, int xd2c, int dw, int dy, int cy, int up1, int up0, int xup1, int xup0, int xdn1) DOCUMENT ME!
protected void	code_bitmap_directly(GBitmap bm) DOCUMENT ME!
protected abstract void	code_bitmap_directly(GBitmap bm, int dw, int dy, int up2, int up1, int up0) DOCUMENT ME!
protected abstract java.lang.String	code_comment(java.lang.String comment) DOCUMENT ME!
protected void	code_eventual_lossless_refinement() DOCUMENT ME!
protected void	code_image_size(JB2Dict ignored) DOCUMENT ME!
protected void	code_image_size(JB2Image ignored) DOCUMENT ME!
protected abstract void	code_inherited_shape_count(JB2Dict jim) DOCUMENT ME!
protected abstract int	code_match_index(int index, JB2Dict jim) DOCUMENT ME!
protected int	code_record_A(int rectype, JB2Dict jim, com.lizardtech.djvu.JB2Shape xjshp) DOCUMENT ME!
protected int	code_record_B(int rectype, JB2Image jim, com.lizardtech.djvu.JB2Shape xjshp, com.lizardtech.djvu.JB2Blit xjblt) DOCUMENT ME!
protected abstract int	code_record_type(int rectype) DOCUMENT ME!
protected void	code_relative_location(com.lizardtech.djvu.JB2Blit jblt, int rows, int columns) DOCUMENT ME!
protected void	code_relative_mark_size(GBitmap bm, int cw, int ch) DOCUMENT ME!
protected abstract void	code_relative_mark_size(GBitmap bm, int cw, int ch, int border) DOCUMENT ME!
protected abstract boolean	codeBit(boolean bit, BitContext ctx) DOCUMENT ME!
protected abstract int	codeBit(boolean bit, byte[] array, int offset) DOCUMENT ME!
protected int	codeNum(int low, int high, NumContext ctx, int v) DOCUMENT ME!
protected void	fill_short_list(int v) DOCUMENT ME!
protected int	get_cross_context(GBitmap bm, GBitmap cbm, int up1, int up0, int xup1, int xup0, int xdn1, int column) DOCUMENT ME!
protected abstract int	get_diff(int ignored, NumContext rel_loc) DOCUMENT ME!
protected int	get_direct_context(GBitmap bm, int up2, int up1, int up0, int column) DOCUMENT ME!
protected void	init_library(JB2Dict jim) DOCUMENT ME!
protected void	reset_numcoder() DOCUMENT ME!
protected void	shape2lib(int shapeno, java.lang.Number libno) DOCUMENT ME!
protected int	shift_cross_context(GBitmap bm, GBitmap cbm, int context, int n, int up1, int up0, int xup1, int xup0, int xdn1, int column) DOCUMENT ME!
protected int	shift_direct_context(GBitmap bm, int context, int next, int up2, int up1, int up0, int column) DOCUMENT ME!
protected int	update_short_list(int v) DOCUMENT ME!

Methods inherited from class com.lizardtech.djvu.DjVuObject

checkLockTime, create, create, createSoftReference, createWeakReference, getDjVuOptions, getFromReference, invoke, logError, printStackTrace, setDjVuOptions, verbose

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BIGPOSITIVE

protected static final int BIGPOSITIVE

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Constant Field Values

BIGNEGATIVE

protected static final int BIGNEGATIVE

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Constant Field Values

START_OF_DATA

protected static final byte START_OF_DATA

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Constant Field Values

NEW_MARK

protected static final byte NEW_MARK

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Constant Field Values

NEW_MARK_LIBRARY_ONLY

protected static final byte NEW_MARK_LIBRARY_ONLY

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Constant Field Values

NEW_MARK_IMAGE_ONLY

protected static final byte NEW_MARK_IMAGE_ONLY

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Constant Field Values

MATCHED_REFINE

protected static final byte MATCHED_REFINE

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Constant Field Values

MATCHED_REFINE_LIBRARY_ONLY

protected static final byte MATCHED_REFINE_LIBRARY_ONLY

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Constant Field Values

MATCHED_REFINE_IMAGE_ONLY

protected static final byte MATCHED_REFINE_IMAGE_ONLY

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Constant Field Values

MATCHED_COPY

protected static final byte MATCHED_COPY

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Constant Field Values

NON_MARK_DATA

protected static final byte NON_MARK_DATA

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Constant Field Values

REQUIRED_DICT_OR_RESET

protected static final byte REQUIRED_DICT_OR_RESET

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Constant Field Values

PRESERVED_COMMENT

protected static final byte PRESERVED_COMMENT

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Constant Field Values

END_OF_DATA

protected static final byte END_OF_DATA

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Constant Field Values

MINUS_ONE_OBJECT

protected static final java.lang.Integer MINUS_ONE_OBJECT

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dist_refinement_flag

protected final BitContext dist_refinement_flag

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offset_type_dist

protected final BitContext offset_type_dist

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abs_loc_x

protected final NumContext abs_loc_x

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abs_loc_y

protected final NumContext abs_loc_y

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abs_size_x

protected final NumContext abs_size_x

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abs_size_y

protected final NumContext abs_size_y

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dist_comment_byte

protected final NumContext dist_comment_byte

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dist_comment_length

protected final NumContext dist_comment_length

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dist_match_index

protected final NumContext dist_match_index

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dist_record_type

protected final NumContext dist_record_type

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image_size_dist

protected final NumContext image_size_dist

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inherited_shape_count_dist

protected final NumContext inherited_shape_count_dist

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rel_loc_x_current

protected final NumContext rel_loc_x_current

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rel_loc_x_last

protected final NumContext rel_loc_x_last

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rel_loc_y_current

protected final NumContext rel_loc_y_current

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rel_loc_y_last

protected final NumContext rel_loc_y_last

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rel_size_x

protected final NumContext rel_size_x

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rel_size_y

protected final NumContext rel_size_y

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bitcells

protected final java.util.Vector bitcells

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leftcell

protected final java.util.Vector leftcell

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lib2shape

protected final java.util.Vector lib2shape

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libinfo

protected final java.util.Vector libinfo

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rightcell

protected final java.util.Vector rightcell

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shape2lib

protected final java.util.Vector shape2lib

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short_list

protected final int[] short_list

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bitdist

protected byte[] bitdist

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cbitdist

protected byte[] cbitdist

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gotstartrecordp

protected boolean gotstartrecordp

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refinementp

protected boolean refinementp

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image_columns

protected int image_columns

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image_rows

protected int image_rows

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last_bottom

protected int last_bottom

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last_left

protected int last_left

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last_right

protected int last_right

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last_row_bottom

protected int last_row_bottom

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last_row_left

protected int last_row_left

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short_list_pos

protected int short_list_pos

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Constructor Detail

JB2Codec

protected JB2Codec(boolean encoding)

Creates a new JB2Codec object.

Parameters:

encoding - DOCUMENT ME!

Method Detail

codeNum

protected int codeNum(int low,
                      int high,
                      NumContext ctx,
                      int v)
               throws java.io.IOException

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Parameters:

low - DOCUMENT ME!

high - DOCUMENT ME!

ctx - DOCUMENT ME!

v - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException - DOCUMENT ME!

java.lang.ArrayIndexOutOfBoundsException - DOCUMENT ME!

code_absolute_location

protected abstract void code_absolute_location(com.lizardtech.djvu.JB2Blit jblt,
                                               int rows,
                                               int columns)
                                        throws java.io.IOException

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Parameters:

jblt - DOCUMENT ME!

rows - DOCUMENT ME!

columns - DOCUMENT ME!

Throws:

java.io.IOException

code_bitmap_by_cross_coding

protected abstract void code_bitmap_by_cross_coding(GBitmap bm,
                                                    GBitmap cbm,
                                                    int xd2c,
                                                    int dw,
                                                    int dy,
                                                    int cy,
                                                    int up1,
                                                    int up0,
                                                    int xup1,
                                                    int xup0,
                                                    int xdn1)
                                             throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

cbm - DOCUMENT ME!

xd2c - DOCUMENT ME!

dw - DOCUMENT ME!

dy - DOCUMENT ME!

cy - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

xup1 - DOCUMENT ME!

xup0 - DOCUMENT ME!

xdn1 - DOCUMENT ME!

Throws:

java.io.IOException

code_bitmap_directly

protected abstract void code_bitmap_directly(GBitmap bm,
                                             int dw,
                                             int dy,
                                             int up2,
                                             int up1,
                                             int up0)
                                      throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

dw - DOCUMENT ME!

dy - DOCUMENT ME!

up2 - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

Throws:

java.io.IOException

code_eventual_lossless_refinement

protected void code_eventual_lossless_refinement()
                                          throws java.io.IOException

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Throws:

java.io.IOException - DOCUMENT ME!

code_inherited_shape_count

protected abstract void code_inherited_shape_count(JB2Dict jim)
                                            throws java.io.IOException

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Parameters:

jim - DOCUMENT ME!

Throws:

java.io.IOException

code_absolute_mark_size

protected final void code_absolute_mark_size(GBitmap bm)
                                      throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

code_absolute_mark_size

protected abstract void code_absolute_mark_size(GBitmap bm,
                                                int border)
                                         throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

border - DOCUMENT ME!

Throws:

java.io.IOException

code_image_size

protected void code_image_size(JB2Dict ignored)
                        throws java.io.IOException

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Parameters:

ignored - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

code_image_size

protected void code_image_size(JB2Image ignored)
                        throws java.io.IOException

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Parameters:

ignored - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

code_record_A

protected int code_record_A(int rectype,
                            JB2Dict jim,
                            com.lizardtech.djvu.JB2Shape xjshp)
                     throws java.io.IOException

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Parameters:

rectype - DOCUMENT ME!

jim - DOCUMENT ME!

xjshp - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException - DOCUMENT ME!

java.lang.IllegalArgumentException - DOCUMENT ME!

code_record_B

protected int code_record_B(int rectype,
                            JB2Image jim,
                            com.lizardtech.djvu.JB2Shape xjshp,
                            com.lizardtech.djvu.JB2Blit xjblt)
                     throws java.io.IOException

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Parameters:

rectype - DOCUMENT ME!

jim - DOCUMENT ME!

xjshp - DOCUMENT ME!

xjblt - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException - DOCUMENT ME!

java.lang.IllegalArgumentException - DOCUMENT ME!

code_relative_mark_size

protected final void code_relative_mark_size(GBitmap bm,
                                             int cw,
                                             int ch)
                                      throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

cw - DOCUMENT ME!

ch - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

fill_short_list

protected final void fill_short_list(int v)

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Parameters:

v - DOCUMENT ME!

get_cross_context

protected final int get_cross_context(GBitmap bm,
                                      GBitmap cbm,
                                      int up1,
                                      int up0,
                                      int xup1,
                                      int xup0,
                                      int xdn1,
                                      int column)

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Parameters:

bm - DOCUMENT ME!

cbm - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

xup1 - DOCUMENT ME!

xup0 - DOCUMENT ME!

xdn1 - DOCUMENT ME!

column - DOCUMENT ME!

Returns:

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get_direct_context

protected final int get_direct_context(GBitmap bm,
                                       int up2,
                                       int up1,
                                       int up0,
                                       int column)

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Parameters:

bm - DOCUMENT ME!

up2 - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

column - DOCUMENT ME!

Returns:

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code_relative_mark_size

protected abstract void code_relative_mark_size(GBitmap bm,
                                                int cw,
                                                int ch,
                                                int border)
                                         throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

cw - DOCUMENT ME!

ch - DOCUMENT ME!

border - DOCUMENT ME!

Throws:

java.io.IOException

get_diff

protected abstract int get_diff(int ignored,
                                NumContext rel_loc)
                         throws java.io.IOException

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Parameters:

ignored - DOCUMENT ME!

rel_loc - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

add_library

protected int add_library(int shapeno,
                          com.lizardtech.djvu.JB2Shape jshp)

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Parameters:

shapeno - DOCUMENT ME!

jshp - DOCUMENT ME!

Returns:

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reset_numcoder

protected void reset_numcoder()

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shape2lib

protected final void shape2lib(int shapeno,
                               java.lang.Number libno)

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Parameters:

shapeno - DOCUMENT ME!

libno - DOCUMENT ME!

shift_cross_context

protected final int shift_cross_context(GBitmap bm,
                                        GBitmap cbm,
                                        int context,
                                        int n,
                                        int up1,
                                        int up0,
                                        int xup1,
                                        int xup0,
                                        int xdn1,
                                        int column)

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Parameters:

bm - DOCUMENT ME!

cbm - DOCUMENT ME!

context - DOCUMENT ME!

n - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

xup1 - DOCUMENT ME!

xup0 - DOCUMENT ME!

xdn1 - DOCUMENT ME!

column - DOCUMENT ME!

Returns:

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shift_direct_context

protected final int shift_direct_context(GBitmap bm,
                                         int context,
                                         int next,
                                         int up2,
                                         int up1,
                                         int up0,
                                         int column)

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Parameters:

bm - DOCUMENT ME!

context - DOCUMENT ME!

next - DOCUMENT ME!

up2 - DOCUMENT ME!

up1 - DOCUMENT ME!

up0 - DOCUMENT ME!

column - DOCUMENT ME!

Returns:

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codeBit

protected abstract boolean codeBit(boolean bit,
                                   BitContext ctx)
                            throws java.io.IOException

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Parameters:

bit - DOCUMENT ME!

ctx - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

codeBit

protected abstract int codeBit(boolean bit,
                               byte[] array,
                               int offset)
                        throws java.io.IOException

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Parameters:

bit - DOCUMENT ME!

array - DOCUMENT ME!

offset - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

code_comment

protected abstract java.lang.String code_comment(java.lang.String comment)
                                          throws java.io.IOException

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Parameters:

comment - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

code_match_index

protected abstract int code_match_index(int index,
                                        JB2Dict jim)
                                 throws java.io.IOException

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Parameters:

index - DOCUMENT ME!

jim - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

code_record_type

protected abstract int code_record_type(int rectype)
                                 throws java.io.IOException

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Parameters:

rectype - DOCUMENT ME!

Returns:

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Throws:

java.io.IOException

code_bitmap_by_cross_coding

protected void code_bitmap_by_cross_coding(GBitmap bm,
                                           GBitmap cbm,
                                           int libno)
                                    throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

cbm - DOCUMENT ME!

libno - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

code_bitmap_directly

protected void code_bitmap_directly(GBitmap bm)
                             throws java.io.IOException

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Parameters:

bm - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

code_relative_location

protected void code_relative_location(com.lizardtech.djvu.JB2Blit jblt,
                                      int rows,
                                      int columns)
                               throws java.io.IOException

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Parameters:

jblt - DOCUMENT ME!

rows - DOCUMENT ME!

columns - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

java.lang.IllegalStateException - DOCUMENT ME!

init_library

protected void init_library(JB2Dict jim)

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Parameters:

jim - DOCUMENT ME!

update_short_list

protected int update_short_list(int v)

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Parameters:

v - DOCUMENT ME!

Returns:

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