SAD8x4

Evaluates sum of absolute difference between current and reference 8X4 blocks.

Syntax

IppStatus ippiSAD8x4_8u32s_C1R(const Ipp8u* pSrcCur, int srcCurStep, const Ipp8u* pSrcRef, int srcRefStep, Ipp32s* pSAD, Ipp32s mcType);

Parameters

pSrcCur	Pointer to an 8x4 block in the source plane.
srcCurStep	Distance in bytes between starts of the consecutive lines in the source image.
pSrcRef	Pointer to an 8x4 block in the reference plane.
srcRefStep	Distance in bytes between starts of the consecutive lines in the reference image.
pDst	Pointer to the SAD value.
mcType	MC type IPPVC_MC_APX; reserved and must be 0.

Description

This function is declared in the ippvc.h header file. The function ippiSAD8x4_8u32s_C1R evaluates the sum of absolute difference of all the elements in the current 8x4 block and the corresponding elements in the reference 8x4 block. The result is stored in pSAD.

This function is used in the H.264 encoder included into Intel IPP Samples. See introduction to Motion Estimation.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when at least one input pointer is NULL.