YCbCr422ToYCrCb420

Converts 4:2:2 YCbCr image to 4:2:0 YCrCb image.

Syntax

IppStatus ippiYCbCr422ToYCrCb420_8u_C2P3R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Array of pointers to the ROI in each plane of the destination image.
dstStep	Array of distances in bytes between starts of consecutive lines in the destination image planes.
roiSize	Size of the source and destination ROI in pixels, height and width should be multiple of 2.

Description

The function ippiYCbCr422ToYCrCb420 is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function converts the 4:2:2 two-channel image pSrc that has the following sequence of samples: Y0, Cb0, Y1, Cr0, Y2, Cb1, Y3, Cr1, ... to the 4:2:0 three-plane image pDst with the following order of pointers: Y-plane, Cr-plane, Cb-plane (see Table “Pixel-Order Image Formats” and Table “Planar Image Formats”).

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error.
ippStsNullPtrErr	Indicates an error condition if any of the specified pointers is NULL.
ippStsSizeErr	Indicates an error condition if any field of the roiSize is less than 2.