Evaluates difference between current and reference 4X4 blocks and calculates sums of 4X4 residual blocks elements for 16X16 blocks.
Syntax
IppStatus ippiSumsDiff16x16Blocks4x4_8u16s_C1(const Ipp8u* pSrc, Ipp32s srcStep, const Ipp8u* pPred, Ipp32s predStep, Ipp16s* pSums, Ipp16s* pDiff);
Parameters
pSrc |
Pointer to a 16x16 block in the current plane. |
srcStep |
Distance in bytes between starts of the consecutive lines in the source image. |
pPred |
Pointer to a 16x16 block in the reference plane. |
predStep |
Distance in bytes between starts of the consecutive lines in the reference image. |
pSums |
Pointer to an array of size 16 that contains sums of 4x4 difference blocks coefficients. The array is filled by function. |
pDiff |
If not NULL, pointer to an array of size 256 that contains a sequence of 4x4 residual blocks. The array is filled by function. |
Description
This function is declared in the ippvc.h header file. The function ippiSumsDiff16x16Blocks4x4_8u16s_C1 evaluates difference between current and reference 4x4 blocks and calculates sums of 4x4 residual blocks elements in same order as shown in Figure the figure below.
.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when at least one input pointer is NULL. |