You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
2.7 KiB
61 lines
2.7 KiB
3 years ago
|
/*
|
||
|
|
Copyright (C) 2002 Andrea Mazzoleni ( http://advancemame.sf.net )
|
||
|
|
Copyright (C) 2001-4 Igor Pavlov ( http://www.7-zip.org )
|
||
|
|
|
||
|
|
This library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License version 2.1 as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
This library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with this library; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __RCDEFS_H
|
||
|
|
#define __RCDEFS_H
|
||
|
|
|
||
|
|
#include "aribitcd.h"
|
||
|
|
#include "ariconst.h"
|
||
|
|
|
||
|
|
#define RC_INIT_VAR \
|
||
|
|
UINT32 aRange = aRangeDecoder->m_Range; \
|
||
|
|
UINT32 aCode = aRangeDecoder->m_Code;
|
||
|
|
|
||
|
|
#define RC_FLUSH_VAR \
|
||
|
|
aRangeDecoder->m_Range = aRange; \
|
||
|
|
aRangeDecoder->m_Code = aCode;
|
||
|
|
|
||
|
|
#define RC_NORMALIZE \
|
||
|
|
if (aRange < NCompression::NArithmetic::kTopValue) \
|
||
|
|
{ \
|
||
|
|
aCode = (aCode << 8) | aRangeDecoder->m_Stream.ReadByte(); \
|
||
|
|
aRange <<= 8; }
|
||
|
|
|
||
|
|
#define RC_GETBIT2(aNumMoveBits, aProb, aModelIndex, Action0, Action1) \
|
||
|
|
{UINT32 aNewBound = (aRange >> NCompression::NArithmetic::kNumBitModelTotalBits) * aProb; \
|
||
|
|
if (aCode < aNewBound) \
|
||
|
|
{ \
|
||
|
|
Action0; \
|
||
|
|
aRange = aNewBound; \
|
||
|
|
aProb += (NCompression::NArithmetic::kBitModelTotal - aProb) >> aNumMoveBits; \
|
||
|
|
aModelIndex <<= 1; \
|
||
|
|
} \
|
||
|
|
else \
|
||
|
|
{ \
|
||
|
|
Action1; \
|
||
|
|
aRange -= aNewBound; \
|
||
|
|
aCode -= aNewBound; \
|
||
|
|
aProb -= (aProb) >> aNumMoveBits; \
|
||
|
|
aModelIndex = (aModelIndex << 1) + 1; \
|
||
|
|
}} \
|
||
|
|
RC_NORMALIZE
|
||
|
|
|
||
|
|
#define RC_GETBIT(aNumMoveBits, aProb, aModelIndex) RC_GETBIT2(aNumMoveBits, aProb, aModelIndex, ; , ;)
|
||
|
|
|
||
|
|
#endif
|