mirror of
https://github.com/MacPaw/XADMaster.git
synced 2025-08-29 19:43:47 +02:00
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
|
|
* RangeCoder.h
|
|
*
|
|
* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA
|
|
*/
|
|
#ifndef __PPMD_RANGE_CODER_H__
|
|
#define __PPMD_RANGE_CODER_H__
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
typedef int PPMdReadFunction(void *context);
|
|
|
|
typedef struct PPMdRangeCoder
|
|
{
|
|
PPMdReadFunction *readfunc;
|
|
void *inputcontext;
|
|
|
|
uint32_t low,code,range,bottom;
|
|
bool uselow;
|
|
} PPMdRangeCoder;
|
|
|
|
void InitializePPMdRangeCoder(PPMdRangeCoder *self,
|
|
PPMdReadFunction *readfunc,void *inputcontext,
|
|
bool uselow,int bottom);
|
|
|
|
uint32_t PPMdRangeCoderCurrentCount(PPMdRangeCoder *self,uint32_t scale);
|
|
void RemovePPMdRangeCoderSubRange(PPMdRangeCoder *self,uint32_t lowcount,uint32_t highcount);
|
|
|
|
int NextWeightedBitFromPPMdRangeCoder(PPMdRangeCoder *self,int weight,int size);
|
|
|
|
int NextWeightedBitFromPPMdRangeCoder2(PPMdRangeCoder *self,int weight,int shift);
|
|
|
|
void NormalizePPMdRangeCoder(PPMdRangeCoder *self);
|
|
|
|
#endif
|