Visible to Intel only — GUID: GUID-6CB55253-370C-4C01-B10A-B7C5BB4E1CD1
Visible to Intel only — GUID: GUID-6CB55253-370C-4C01-B10A-B7C5BB4E1CD1
YCbCr422To420_Interlace
Converts interlaced YCbCr image from 4:2:2 sampling format to 4:2:0 format.
Syntax
IppStatus ippiYCbCr422To420_Interlace_8u_P3R(const Ipp8u* pSrc[3], int srcStep[3], 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 |
Array of pointers to the ROI in each plane for source image. |
srcStep |
Array of distances in bytes between starts of consecutive lines in each plane for the source image. |
pDst |
Array of pointers to the ROI in each plane for destination image. |
dstStep |
Array of distances in bytes between starts of consecutive lines in each plane fore destination image. |
roiSize |
Size of the source and destination ROI in pixels, its width must be multiple of 2, and height must be multiple of 4. |
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function converts the interlaced 4:2:2 image pSrc to the 4:2:0 image pDst (see Table “Planar Image Formats”).
The conversion is performed in accordance with the following formulas:
Y1dest = Y1src;
Cb0(Cr0)dest = (3*Cb0(Cr0)src + Cb2(Cr2)src + 2)/4;
Cb1(Cr1)dest = (Cb1(Cr1)src + 3*Cb3(Cr3)src + 2)/4;
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 roiSize.width is less than 2, or roiSize.height is less than 4. |
ippStsDoubleSize |
Indicates a warning if roiSize.width is not multiple of 2, or roiSize.height is not multiple of 4. |