1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
// PpmdEncoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "../../../C/CpuArch.h"
#include "../Common/StreamUtils.h"
#include "PpmdEncoder.h"
namespace NCompress {
namespace NPpmd {
static const UInt32 kBufSize = (1 << 20);
static const Byte kOrders[10] = { 3, 4, 4, 5, 5, 6, 8, 16, 24, 32 };
void CEncProps::Normalize(int level)
{
if (level < 0) level = 5;
if (level > 9) level = 9;
if (MemSize == (UInt32)(Int32)-1)
MemSize = level >= 9 ? ((UInt32)192 << 20) : ((UInt32)1 << (level + 19));
const unsigned kMult = 16;
if (MemSize / kMult > ReduceSize)
{
for (unsigned i = 16; i <= 31; i++)
{
UInt32 m = (UInt32)1 << i;
if (ReduceSize <= m / kMult)
{
if (MemSize > m)
MemSize = m;
break;
}
}
}
if (Order == -1) Order = kOrders[(unsigned)level];
}
CEncoder::CEncoder():
_inBuf(NULL)
{
_props.Normalize(-1);
_rangeEnc.Stream = &_outStream.vt;
Ppmd7_Construct(&_ppmd);
}
CEncoder::~CEncoder()
{
::MidFree(_inBuf);
Ppmd7_Free(&_ppmd, &g_BigAlloc);
}
STDMETHODIMP CEncoder::SetCoderProperties(const PROPID *propIDs, const PROPVARIANT *coderProps, UInt32 numProps)
{
int level = -1;
CEncProps props;
for (UInt32 i = 0; i < numProps; i++)
{
const PROPVARIANT &prop = coderProps[i];
PROPID propID = propIDs[i];
if (propID > NCoderPropID::kReduceSize)
continue;
if (propID == NCoderPropID::kReduceSize)
{
if (prop.vt == VT_UI8 && prop.uhVal.QuadPart < (UInt32)(Int32)-1)
props.ReduceSize = (UInt32)prop.uhVal.QuadPart;
continue;
}
if (prop.vt != VT_UI4)
return E_INVALIDARG;
UInt32 v = (UInt32)prop.ulVal;
switch (propID)
{
case NCoderPropID::kUsedMemorySize:
if (v < (1 << 16) || v > PPMD7_MAX_MEM_SIZE || (v & 3) != 0)
return E_INVALIDARG;
props.MemSize = v;
break;
case NCoderPropID::kOrder:
if (v < 2 || v > 32)
return E_INVALIDARG;
props.Order = (Byte)v;
break;
case NCoderPropID::kNumThreads: break;
case NCoderPropID::kLevel: level = (int)v; break;
default: return E_INVALIDARG;
}
}
props.Normalize(level);
_props = props;
return S_OK;
}
STDMETHODIMP CEncoder::WriteCoderProperties(ISequentialOutStream *outStream)
{
const UInt32 kPropSize = 5;
Byte props[kPropSize];
props[0] = (Byte)_props.Order;
SetUi32(props + 1, _props.MemSize);
return WriteStream(outStream, props, kPropSize);
}
HRESULT CEncoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
const UInt64 * /* inSize */, const UInt64 * /* outSize */, ICompressProgressInfo *progress)
{
if (!_inBuf)
{
_inBuf = (Byte *)::MidAlloc(kBufSize);
if (!_inBuf)
return E_OUTOFMEMORY;
}
if (!_outStream.Alloc(1 << 20))
return E_OUTOFMEMORY;
if (!Ppmd7_Alloc(&_ppmd, _props.MemSize, &g_BigAlloc))
return E_OUTOFMEMORY;
_outStream.Stream = outStream;
_outStream.Init();
Ppmd7z_RangeEnc_Init(&_rangeEnc);
Ppmd7_Init(&_ppmd, _props.Order);
UInt64 processed = 0;
for (;;)
{
UInt32 size;
RINOK(inStream->Read(_inBuf, kBufSize, &size));
if (size == 0)
{
// We don't write EndMark in PPMD-7z.
// Ppmd7_EncodeSymbol(&_ppmd, &_rangeEnc, -1);
Ppmd7z_RangeEnc_FlushData(&_rangeEnc);
return _outStream.Flush();
}
for (UInt32 i = 0; i < size; i++)
{
Ppmd7_EncodeSymbol(&_ppmd, &_rangeEnc, _inBuf[i]);
RINOK(_outStream.Res);
}
processed += size;
if (progress)
{
UInt64 outSize = _outStream.GetProcessed();
RINOK(progress->SetRatioInfo(&processed, &outSize));
}
}
}
}}
|
