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// 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.p;
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));
}
}
}
}}
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