Converts interlaced YCbCr image from 4:2:0 sampling format to 4:2:2 format.
IppStatus ippiYCbCr420To422_Interlace_8u_P3R(const Ipp8u* pSrc[3], int srcStep[3], Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);
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 for the 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. |
The function ippiYCbCr420To422_Interlace is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP).
This function converts the interlaced planar 4:2:0 source image pSrc to the 4:2:2 image pDst. Three-plane image has the following order of pointers: Y-plane, Cb-plane, Cr-plane.
The conversion is performed in accordance with the following formulas:
Yndest = Ynsrc;
Cb0(Cr0)dest = (5*Cb0(Cr0)src + 3*Cb2(Cr2)src + 4)/8;
Cb1(Cr1)dest = (7*Cb1(Cr1)src + Cb3(Cr3)src + 4)/8;
Cb2(Cr2)dest = (Cb0(Cr0)src + 7*Cb2(Cr2)src + 4)/8;
Cb3(Cr3)dest = (3*Cb1(Cr1)src + 5*Cb3(Cr3)src + 4)/8;
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. |
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