Class HuffmanTreeGroup

java.lang.Object

com.itextpdf.io.codec.brotli.dec.HuffmanTreeGroup

final class HuffmanTreeGroup
extends Object

Contains a collection of huffman trees with the same alphabet size.

Field Summary

Fields

Modifier and Type	Field	Description
private int	alphabetSize	The maximal alphabet size in this group.
(package private) int[]	codes	Storage for Huffman lookup tables.
(package private) int[]	trees	Offsets of distinct lookup tables in codes storage.

Constructor Summary

Constructors

Constructor	Description
HuffmanTreeGroup()

Method Summary

Modifier and Type	Method	Description
(package private) static void	decode(HuffmanTreeGroup group, BitReader br)	Decodes Huffman trees from input stream and constructs lookup tables.
(package private) static void	init(HuffmanTreeGroup group, int alphabetSize, int n)	Initializes the Huffman tree group.

Methods inherited from class Object

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

Field Details

alphabetSize

private int alphabetSize

The maximal alphabet size in this group.

codes

int[] codes

Storage for Huffman lookup tables.

trees

int[] trees

Offsets of distinct lookup tables in codes storage.

Constructor Details

HuffmanTreeGroup

HuffmanTreeGroup()

Method Details

init

static void init(HuffmanTreeGroup group,
 int alphabetSize,
 int n)

Initializes the Huffman tree group.

Parameters:

group - POJO to be initialised

alphabetSize - the maximal alphabet size in this group

n - number of Huffman codes

decode

static void decode(HuffmanTreeGroup group,
 BitReader br)

Decodes Huffman trees from input stream and constructs lookup tables.

Parameters:

group - target POJO

br - data source