BWTInv_SmallBlock

Performs the inverse BWT transform for small data block.

Syntax

IppStatus ippsBWTInv_SmallBlock_8u(const Ipp8u* pSrc, Ipp8u* pDst, int len, int index, Ipp8u* pBWTBuff);

Parameters

pSrc	Pointer to the source vector.
pDst	Pointer to the destination vector.
len	Number of elements in the source and destination vectors.
index	Index of first position for the inverse BWT transform.
pBWTBuff	Pointer to the additional buffer.

Description

The function ippsBWTInv_SmallBlock is declared in the ippdc.h file. This function performs the inverse BWT transform od small block of data, that the number of elements must be in the range (0, 32768]. The function processes len elements starting from index element of the source vector pSrc and stores result in the vector pDst. The function uses the external buffer pBWTBuff. The size of this buffer must be computed by calling the function ippsBWTGetSize_SmallBlock beforehand.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error if one of the specified pointers is NULL.
ippStsSizeErr	Indicates an error if len is less than or equal to 0, or is greater than 32768; or if index is greater than or equal to len.