FilterDeblockingChroma_HorEdge_AVS

Performs deblocking filtering on the horizontal edges of 8X8 chroma macroblock.

Syntax

IppStatus ippiFilterDeblockingChroma_HorEdge_AVS_8u_C1IR(IppiFilterDeblock_8u* pDeblockInfo);

Parameters

pDeblockInfo

Pointer to the deblocking parameters

Description

The function ippiFilterDeblockingChroma_HorEdge_AVS_8u_C1IR is declared in the ippvc.h file. This function performs Deblocking Filtering on the horizontal edge of the 8x8 chroma macroblock in accordance with 9.11 of [AVS].

IppiFilterDeblock_8u structure contains the following fields:

pSrcDstPlane

Pointer to the initial and resultant coefficients.

srcDstStep

Distance between starts of the consecutive lines in the array.

pAlpha

Array of size 1 of Alpha Thresholds.

pBeta

Array of size 1 of Beta Thresholds.

pThresholds

Array of size 1 of Thresholds (filter reduction parameter C).

pBs

Array of size 2 of BS parameters (values for the upper edge of each 4x8 block).

The function uses arrays pAlpha, pBeta, pBs, pThresholds as input arguments. pAlpha, pBeta, and pBs are the same arrays as in FilterDeblockingLuma_HorEdge_AVS function. See the figure below for the arrangement of pBs array elements.

Arrangement of pBs Array Elements into an 8x8 Chroma Block



Values of the arrays are calculated as follows:

pBs values are calculated as per 9.11.1 of [AVS] and may take the following values: 0 - if no edge is filtered; 1 - if filtering is weak; 2 - if filtering is strong. pAlpha values are derived from Table 9-9 of [AVS]. pBeta values are derived from Table 9-9 of [AVS]. pThresholds[i] values are derived from Table 9-10 of [AVS].

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error condition if at least one of the specified pointers is NULL.


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