CEncoder::CEncoder()
{
_encoder = 0;
_encoder = Lzma2Enc_Create(&g_Alloc, &g_BigAlloc);
if (_encoder == 0)
throw 1;
}
static SRes Lzma2WithFilters_Create(CLzma2WithFilters *p)
{
p->lzma2 = Lzma2Enc_Create(p->alloc, p->bigAlloc);
if (p->lzma2 == 0)
return SZ_ERROR_MEM;
return SZ_OK;
}
void CompressWithLZMA2(std::vector<unsigned char> &outBuf, const std::vector<unsigned char> &inBuf, Byte* ptrProperties)
{
VectorInStream inStream = { &VectorInStream_Read, &inBuf, 0 };
VectorOutStream outStream = { &VectorOutStream_Write, &outBuf };
CLzma2EncHandle enc;
enc = Lzma2Enc_Create(&g_Alloc, &g_BigAlloc);
assert(enc);
CLzma2EncProps props;
Lzma2EncProps_Init(&props); //Ivan need change the parameters later
//props.lzmaProps.writeEndMark = 1; // 0 or 1
//props.lzmaProps.level = 6;
//props.lzmaProps.dictSize = 1 << 14;
//props.lzmaProps.numThreads = 8;
//props.numTotalThreads = 8;
SRes res = Lzma2Enc_SetProps(enc, &props);
assert(res == SZ_OK);
outBuf.resize(1); // no need
outBuf[0] = Lzma2Enc_WriteProperties(enc);
*ptrProperties = outBuf[0]; //no need this parameter.
UInt64 resLen = inBuf.size();
Byte header[8];
for (int i = 0; i < 8; i++)
header[i] = (Byte)(resLen >> (8 * i));
res = Lzma2Enc_Encode(enc, &outStream.SeqOutStream, &inStream.SeqInStream, 0); //res = Lzma2Enc_Encode(enc, (ISeqOutStream*)&outStream, (ISeqInStream*)&inStream, 0);
assert(res == SZ_OK);
Lzma2Enc_Destroy(enc);
FILE *fout = fopen("data.dc.dat", "wb+"); //change the file name.
fwrite(&outBuf[0], 1, 1, fout);
fwrite(&header[0], 1, 8, fout);
fwrite(&outBuf[1], 1, outBuf.size() - 1, fout);
fclose(fout);
}
