Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

YCbCr420ToBGR

Converts a YCbCr image with the 4:2:0 sampling to the BGR image.

Syntax

IppStatus ippiYCbCr420ToBGR_8u_P3C3R(const Ipp8u* pSrc[3], int srcStep[3], Ipp8u* pDst, int dstStep, IppiSize roiSize);

IppStatus ippiYCbCr420ToBGR_8u_P3C4R(const Ipp8u* pSrc[3], int srcStep[3],Ipp8u* pDst, int dstStep, IppiSize roiSize, Ipp8u aval);

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

An array of pointers to ROI in separate planes of the source image.

srcStep

An array of distances in bytes between starts of consecutive lines in the source image planes.

pDst

Pointer to the destination image ROI.

dstStep

Distance in bytes between starts of consecutive lines in the destination image.

roiSize

Size of the source and destination ROI in pixels.

aval

Constant value to create fourth channel.

Description

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

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

Fourth channel is created by setting channel values to the constant value aval.

The values of 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 operation, and returns 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.