Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference

ID 790148
Date 10/31/2024
Public
Document Table of Contents

RGBToYCrCb420

Converts an RGB image to the YCrCb image with 4:2:0 sampling format.

Syntax

IppStatus ippiRGBToYCrCb420_8u_AC4P3R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);

Include Files

ippcc.h

Domain Dependencies

Headers: ippcore.h, ippvm.h, ipps.h, ippi.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib

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 ROI in separate planes 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.

Description

This function operates with ROI (see Regions of Interest in Intel IPP).

This function converts a four-channel gamma-corrected R'G'B' image pSrc to the planar Y'Cr'Cb' image pDst with the 4:2:0 sampling (see Table “Planar Image Formats” for more details). The conversion is performed according to the same formulas as the function ippiRGBToYCbCr does.

roiSize.width and roiSize.height should be multiples of 2. If not the function reduces their original values to the nearest multiples of 2, performs the operation, and returns a warning message.

Return Values

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.

ippStsDoubleSize

Indicates a warning if roiSize has a field that is not a multiple of 2.