ext
laslib
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integercompressor.hpp
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/*
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===============================================================================
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FILE: integercompressor.hpp
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CONTENTS:
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This compressor provides three different contexts for encoding integer
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numbers whose range may lie anywhere between 1 and 31 bits, which is
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specified with the SetPrecision function.
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The compressor encodes two things:
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(1) the number k of miss-predicted low-order bits and
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(2) the k-bit number that corrects the missprediction
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The k-bit number is usually coded broken in two chunks. The highest
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bits are compressed using an arithmetic range table. The lower bits
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are stored raw without predicive coding. How many of the higher bits
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are compressed can be specified with bits_high. The default is 8.
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PROGRAMMERS:
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martin.isenburg@gmail.com
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COPYRIGHT:
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(c) 2005-2011, Martin Isenburg, LASSO - tools to catch reality
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This is free software; you can redistribute and/or modify it under the
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terms of the GNU Lesser General Licence as published by the Free Software
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Foundation. See the COPYING file for more information.
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This software is distributed WITHOUT ANY WARRANTY and without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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CHANGE HISTORY:
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10 January 2011 -- licensing change for LGPL release and liblas integration
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10 December 2010 -- unified for all entropy coders at Baeckerei Schaefer
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31 October 2009 -- switched from the Rangecoder to the Entropycoder
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30 September 2005 -- now splitting the corrector into raw and compressed bits
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13 July 2005 -- created after returning with many mosquito bites from OBX
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===============================================================================
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*/
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#ifndef INTEGER_COMPRESSOR_HPP
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#define INTEGER_COMPRESSOR_HPP
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#include "
entropyencoder.hpp
"
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#include "
entropydecoder.hpp
"
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class
IntegerCompressor
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{
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public
:
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// Constructor & Deconstructor
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IntegerCompressor
(
EntropyEncoder
*
enc
,
U32
bits
=16,
U32
contexts
=1,
U32
bits_high
=8,
U32
range
=0);
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IntegerCompressor
(
EntropyDecoder
*
dec
,
U32
bits
=16,
U32
contexts
=1,
U32
bits_high
=8,
U32
range
=0);
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~IntegerCompressor
();
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// Manage Compressor
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void
initCompressor
();
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void
compress
(
I32
iPred,
I32
iReal,
U32
context=0);
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// Manage Decompressor
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void
initDecompressor
();
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I32
decompress
(
I32
iPred,
U32
context=0);
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// Get the k corrector bits from the last compress/decompress call
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U32
getK
()
const
{
return
k
;};
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private
:
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void
writeCorrector
(
I32
c, EntropyModel* model);
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I32
readCorrector
(EntropyModel* model);
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U32
k
;
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U32
contexts
;
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U32
bits_high
;
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U32
bits
;
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U32
range
;
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U32
corr_bits
;
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U32
corr_range
;
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I32
corr_min
;
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I32
corr_max
;
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EntropyEncoder
*
enc
;
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EntropyDecoder
*
dec
;
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EntropyModel**
mBits
;
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EntropyModel**
mCorrector
;
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int
**
corr_histogram
;
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};
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#endif
IntegerCompressor::compress
void compress(I32 iPred, I32 iReal, U32 context=0)
Definition:
integercompressor.cpp:263
IntegerCompressor::range
U32 range
Definition:
integercompressor.hpp:83
IntegerCompressor::getK
U32 getK() const
Definition:
integercompressor.hpp:71
I32
int I32
Definition:
mydefs.hpp:35
entropyencoder.hpp
IntegerCompressor::dec
EntropyDecoder * dec
Definition:
integercompressor.hpp:91
IntegerCompressor::initCompressor
void initCompressor()
Definition:
integercompressor.cpp:218
EntropyDecoder
Definition:
entropydecoder.hpp:38
IntegerCompressor::corr_max
I32 corr_max
Definition:
integercompressor.hpp:88
IntegerCompressor::corr_min
I32 corr_min
Definition:
integercompressor.hpp:87
IntegerCompressor::IntegerCompressor
IntegerCompressor(EntropyEncoder *enc, U32 bits=16, U32 contexts=1, U32 bits_high=8, U32 range=0)
Definition:
integercompressor.cpp:46
IntegerCompressor::corr_histogram
int ** corr_histogram
Definition:
integercompressor.hpp:97
IntegerCompressor::mCorrector
EntropyModel ** mCorrector
Definition:
integercompressor.hpp:95
IntegerCompressor::bits_high
U32 bits_high
Definition:
integercompressor.hpp:80
IntegerCompressor::readCorrector
I32 readCorrector(EntropyModel *model)
Definition:
integercompressor.cpp:466
IntegerCompressor::corr_bits
U32 corr_bits
Definition:
integercompressor.hpp:85
IntegerCompressor::contexts
U32 contexts
Definition:
integercompressor.hpp:79
IntegerCompressor::corr_range
U32 corr_range
Definition:
integercompressor.hpp:86
IntegerCompressor::writeCorrector
void writeCorrector(I32 c, EntropyModel *model)
Definition:
integercompressor.cpp:363
IntegerCompressor::bits
U32 bits
Definition:
integercompressor.hpp:82
U32
unsigned int U32
Definition:
mydefs.hpp:39
entropydecoder.hpp
IntegerCompressor::decompress
I32 decompress(I32 iPred, U32 context=0)
Definition:
integercompressor.cpp:319
IntegerCompressor::k
U32 k
Definition:
integercompressor.hpp:77
IntegerCompressor::initDecompressor
void initDecompressor()
Definition:
integercompressor.cpp:274
EntropyEncoder
Definition:
entropyencoder.hpp:38
IntegerCompressor::~IntegerCompressor
~IntegerCompressor()
Definition:
integercompressor.cpp:158
IntegerCompressor::enc
EntropyEncoder * enc
Definition:
integercompressor.hpp:90
IntegerCompressor
Definition:
integercompressor.hpp:53
IntegerCompressor::mBits
EntropyModel ** mBits
Definition:
integercompressor.hpp:93
lvr2
Author(s): Thomas Wiemann
, Sebastian Pütz
, Alexander Mock
, Lars Kiesow
, Lukas Kalbertodt
, Tristan Igelbrink
, Johan M. von Behren
, Dominik Feldschnieders
, Alexander Löhr
autogenerated on Wed Mar 2 2022 00:37:23