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// LzmaEncoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "../Common/CWrappers.h"
#include "../Common/StreamUtils.h"
#include "LzmaEncoder.h"
namespace NCompress {
namespace NLzma {
CEncoder::CEncoder()
{
_encoder = NULL;
_encoder = LzmaEnc_Create(&g_Alloc);
if (!_encoder)
throw 1;
}
CEncoder::~CEncoder()
{
if (_encoder)
LzmaEnc_Destroy(_encoder, &g_Alloc, &g_BigAlloc);
}
static inline wchar_t GetUpperChar(wchar_t c)
{
if (c >= 'a' && c <= 'z')
c -= 0x20;
return c;
}
static int ParseMatchFinder(const wchar_t *s, int *btMode, int *numHashBytes)
{
wchar_t c = GetUpperChar(*s++);
if (c == L'H')
{
if (GetUpperChar(*s++) != L'C')
return 0;
int numHashBytesLoc = (int)(*s++ - L'0');
if (numHashBytesLoc < 4 || numHashBytesLoc > 4)
return 0;
if (*s != 0)
return 0;
*btMode = 0;
*numHashBytes = numHashBytesLoc;
return 1;
}
if (c != L'B')
return 0;
if (GetUpperChar(*s++) != L'T')
return 0;
int numHashBytesLoc = (int)(*s++ - L'0');
if (numHashBytesLoc < 2 || numHashBytesLoc > 4)
return 0;
if (*s != 0)
return 0;
*btMode = 1;
*numHashBytes = numHashBytesLoc;
return 1;
}
#define SET_PROP_32(_id_, _dest_) case NCoderPropID::_id_: ep._dest_ = v; break;
HRESULT SetLzmaProp(PROPID propID, const PROPVARIANT &prop, CLzmaEncProps &ep)
{
if (propID == NCoderPropID::kMatchFinder)
{
if (prop.vt != VT_BSTR)
return E_INVALIDARG;
return ParseMatchFinder(prop.bstrVal, &ep.btMode, &ep.numHashBytes) ? S_OK : E_INVALIDARG;
}
if (propID > NCoderPropID::kReduceSize)
return S_OK;
if (propID == NCoderPropID::kReduceSize)
{
if (prop.vt == VT_UI8)
ep.reduceSize = prop.uhVal.QuadPart;
return S_OK;
}
if (prop.vt != VT_UI4)
return E_INVALIDARG;
UInt32 v = prop.ulVal;
switch (propID)
{
case NCoderPropID::kDefaultProp: if (v > 31) return E_INVALIDARG; ep.dictSize = (UInt32)1 << (unsigned)v; break;
SET_PROP_32(kLevel, level)
SET_PROP_32(kNumFastBytes, fb)
SET_PROP_32(kMatchFinderCycles, mc)
SET_PROP_32(kAlgorithm, algo)
SET_PROP_32(kDictionarySize, dictSize)
SET_PROP_32(kPosStateBits, pb)
SET_PROP_32(kLitPosBits, lp)
SET_PROP_32(kLitContextBits, lc)
SET_PROP_32(kNumThreads, numThreads)
default: return E_INVALIDARG;
}
return S_OK;
}
STDMETHODIMP CEncoder::SetCoderProperties(const PROPID *propIDs,
const PROPVARIANT *coderProps, UInt32 numProps)
{
CLzmaEncProps props;
LzmaEncProps_Init(&props);
for (UInt32 i = 0; i < numProps; i++)
{
const PROPVARIANT &prop = coderProps[i];
PROPID propID = propIDs[i];
switch (propID)
{
case NCoderPropID::kEndMarker:
if (prop.vt != VT_BOOL) return E_INVALIDARG; props.writeEndMark = (prop.boolVal != VARIANT_FALSE); break;
default:
RINOK(SetLzmaProp(propID, prop, props));
}
}
return SResToHRESULT(LzmaEnc_SetProps(_encoder, &props));
}
STDMETHODIMP CEncoder::WriteCoderProperties(ISequentialOutStream *outStream)
{
Byte props[LZMA_PROPS_SIZE];
size_t size = LZMA_PROPS_SIZE;
RINOK(LzmaEnc_WriteProperties(_encoder, props, &size));
return WriteStream(outStream, props, size);
}
STDMETHODIMP CEncoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
const UInt64 * /* inSize */, const UInt64 * /* outSize */, ICompressProgressInfo *progress)
{
CSeqInStreamWrap inWrap(inStream);
CSeqOutStreamWrap outWrap(outStream);
CCompressProgressWrap progressWrap(progress);
SRes res = LzmaEnc_Encode(_encoder, &outWrap.p, &inWrap.p, progress ? &progressWrap.p : NULL, &g_Alloc, &g_BigAlloc);
_inputProcessed = inWrap.Processed;
if (res == SZ_ERROR_READ && inWrap.Res != S_OK)
return inWrap.Res;
if (res == SZ_ERROR_WRITE && outWrap.Res != S_OK)
return outWrap.Res;
if (res == SZ_ERROR_PROGRESS && progressWrap.Res != S_OK)
return progressWrap.Res;
return SResToHRESULT(res);
}
}}
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