Visible to Intel only — GUID: GUID-8E9E3994-117C-4B36-AF4C-BF357A41A8C1
Visible to Intel only — GUID: GUID-8E9E3994-117C-4B36-AF4C-BF357A41A8C1
DeflateUpdate Hash
Performs LZ77 encoding according to the specified compression level.
Syntax
IppStatus ippsDeflateUpdateHash_8u(const Ipp8u* pSrc, Ipp32u srcIdx, Ipp32u srcLen, Ipp32s* pHashHeadDst, Ipp32u hashSize, Ipp32s* pHashPrevDst, Ipp32u winSize, int comprLevel);
Include Files
ippdc.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib
Parameters
pSrc |
Pointer to the source vector. |
srcIdx |
Index of the current position in the source vector. |
srcLen |
Length of the source vector. |
pHashHeadDst |
Pointer to the table containing heads of the hash chains. |
hashSize |
Size of the pHashHeadDst table. |
pHashPrevDst |
Pointer to the table contating indexes to the previous strings with the same hash key. |
winSize |
Size of the sliding window and the pHashPrevDst table. |
comprLevel |
Compression level in range [0..9] in accordance with ZLIB. |
Description
This function updates hash tables according to the source context.
The function parameter srcIdx - index of the current position in the source vector - is used to correlate the current position in the source vector and indexes in the hash tables. After processing each 2GB of source data, this index and hash tables must be normalized (instead of 64K of source data in ZLIB).
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error if one of the specified pointers is NULL. |
ippStsSizeErr |
Indicates an error if winSize is less than or equal to 256, or greater than 32768; or if hashSize is less than or equal to 256, or greater than 65536. |