Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

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);

IppStatus ippiYCbCr422ToYCrCb420_8u_C2P2R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDstY, int dstYStep, Ipp8u* pDstCrCb, int dstUVStep, 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 the ROI in each plane of the destination image.

pDstY

Pointer to the destination image Y plane.

dstStep

Array of distances, in bytes, between the starting points of consecutive lines in the destination image planes.

dstYStep

Array of distances, in bytes, between the starting points of consecutive lines in the destination image Y plane.

dstUVStep

Array of distances, in bytes, between the starting points of consecutive lines in the destination image UV plane.

roiSize

Size of the source and destination ROI in pixels, height and width should be multiple of 2.

Description

This function 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.