RGBToYCbCr422

Converts an RGB image to the YCbCr image with 4:2:2 sampling.

Syntax

Case 1: Operation on pixel-order data

IppStatus ippiRGBToYCbCr422_8u_C3C2R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

Case 2; Conversion from pixel-order to planar data

IppStatus, ippiRGBToYCbCr422_8u_C3P3R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);

Case 2: Conversion from planar to pixel-order data

IppStatus ippiRGBToYCbCr422_8u_P3C2R(const Ipp8u* const pSrc[3], int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

pSrc	Pointer to the source image ROI for pixel-order image. An array of pointers to ROI in each separate source color planes for planar images.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Pointer to the destination image ROI for pixel-order image. An array of pointer to ROI in each separate planes for the planar destination image.
dstStep	Distance in bytes between starts of consecutive lines in the destination image.
roiSize	Size of the source and destination ROI in pixels.

The function ippiRGBToYCbCr422 is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP). This function converts the gamma-corrected R'G'B' image pSrc to the Y'Cb'Cr' image pDst with 4:2:2 sampling (see Table “Pixel-Order Image Formats” and Table “Planar Image Formats” for more details). The conversion is performed according to the same formulas as the function ippiRGBToYCbCr does.

The converted buffer for pixel-order image has the reduced bit depth of a 16 bits per pixel, whereas the source buffer has 24 bit depth.

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pSrc or pDst is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with a zero or negative value.