Visible to Intel only — GUID: GUID-1103DD7A-BE82-43B5-9648-AC40C4822087
Visible to Intel only — GUID: GUID-1103DD7A-BE82-43B5-9648-AC40C4822087
YCbCr420ToBGR_709HDTV
Converts a YCbCr image with 4:2:0 sampling to the BGR image for ITU-R BT.709 HDTV signal.
Syntax
IppStatus ippiYCbCr420ToBGR_709HDTV_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 a planar Y'Cb'Cr' image pSrc to the four-channel gamma-corrected B'G'R' image pDst for digital component video signals complied with the ITU-R BT.709 Recommendation [ITU709] for high-definition TV (HDTV). The values of Y' are in the range [16..235], the values of Cb', Cr' are in the range [16..240]. The conversion is performed according to the following formulas [Jack01]:
R' = Y' + 1.540*(Cr' - 128)
G' = Y' - 0.459*(Cr' - 128) - 0.183*(Cb' - 128)
B' = Y' + 1.816*(Cb' - 128)
The destination image pixel values have a nominal range [16..235]. The resulting R'G'B' values should be saturated at the 0 and 255 levels.
The source image pDst has the 4:2:0 sampling format (see Table “Planar Image Formats” for more details).
The values of roiSize.width and roiSize.height should be multiples of 2. Otherwise the function reduces their original values to the nearest multiples of 2, performs 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. |