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This commit is contained in:
Igor Pavlov
2017-04-30 00:00:00 +00:00
committed by Kornel
parent 603abd5528
commit 2efa10565a
442 changed files with 15479 additions and 8525 deletions
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34
C/Ppmd7Dec.c
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@@ -1,5 +1,5 @@
/* Ppmd7Dec.c -- PPMdH Decoder
2010-03-12 : Igor Pavlov : Public domain
2017-04-03 : Igor Pavlov : Public domain
This code is based on PPMd var.H (2001): Dmitry Shkarin : Public domain */
#include "Precomp.h"
@@ -13,44 +13,46 @@ Bool Ppmd7z_RangeDec_Init(CPpmd7z_RangeDec *p)
unsigned i;
p->Code = 0;
p->Range = 0xFFFFFFFF;
if (p->Stream->Read((void *)p->Stream) != 0)
if (IByteIn_Read(p->Stream) != 0)
return False;
for (i = 0; i < 4; i++)
p->Code = (p->Code << 8) | p->Stream->Read((void *)p->Stream);
p->Code = (p->Code << 8) | IByteIn_Read(p->Stream);
return (p->Code < 0xFFFFFFFF);
}
static UInt32 Range_GetThreshold(void *pp, UInt32 total)
#define GET_Ppmd7z_RangeDec CPpmd7z_RangeDec *p = CONTAINER_FROM_VTBL(pp, CPpmd7z_RangeDec, vt);
static UInt32 Range_GetThreshold(const IPpmd7_RangeDec *pp, UInt32 total)
{
CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp;
return (p->Code) / (p->Range /= total);
GET_Ppmd7z_RangeDec
return p->Code / (p->Range /= total);
}
static void Range_Normalize(CPpmd7z_RangeDec *p)
{
if (p->Range < kTopValue)
{
p->Code = (p->Code << 8) | p->Stream->Read((void *)p->Stream);
p->Code = (p->Code << 8) | IByteIn_Read(p->Stream);
p->Range <<= 8;
if (p->Range < kTopValue)
{
p->Code = (p->Code << 8) | p->Stream->Read((void *)p->Stream);
p->Code = (p->Code << 8) | IByteIn_Read(p->Stream);
p->Range <<= 8;
}
}
}
static void Range_Decode(void *pp, UInt32 start, UInt32 size)
static void Range_Decode(const IPpmd7_RangeDec *pp, UInt32 start, UInt32 size)
{
CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp;
GET_Ppmd7z_RangeDec
p->Code -= start * p->Range;
p->Range *= size;
Range_Normalize(p);
}
static UInt32 Range_DecodeBit(void *pp, UInt32 size0)
static UInt32 Range_DecodeBit(const IPpmd7_RangeDec *pp, UInt32 size0)
{
CPpmd7z_RangeDec *p = (CPpmd7z_RangeDec *)pp;
GET_Ppmd7z_RangeDec
UInt32 newBound = (p->Range >> 14) * size0;
UInt32 symbol;
if (p->Code < newBound)
@@ -70,15 +72,15 @@ static UInt32 Range_DecodeBit(void *pp, UInt32 size0)
void Ppmd7z_RangeDec_CreateVTable(CPpmd7z_RangeDec *p)
{
p->p.GetThreshold = Range_GetThreshold;
p->p.Decode = Range_Decode;
p->p.DecodeBit = Range_DecodeBit;
p->vt.GetThreshold = Range_GetThreshold;
p->vt.Decode = Range_Decode;
p->vt.DecodeBit = Range_DecodeBit;
}
#define MASK(sym) ((signed char *)charMask)[sym]
int Ppmd7_DecodeSymbol(CPpmd7 *p, IPpmd7_RangeDec *rc)
int Ppmd7_DecodeSymbol(CPpmd7 *p, const IPpmd7_RangeDec *rc)
{
size_t charMask[256 / sizeof(size_t)];
if (p->MinContext->NumStats != 1)