Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

YCbCr422ToRGB

Converts an YCbCr image with the 4:2:2 sampling to the RGB image.

Syntax

Case 1: Operation on pixel-order data
IppStatus ippiYCbCr422ToRGB_8u_C2C3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
);
IppStatus ippiYCbCr422ToRGB_8u_C2C4R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
, Ipp8u
aval
);
Case 2: Conversion from pixel-order to planar data
IppStatus ippiYCbCr422ToRGB_8u_C2P3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
[3], int
dstStep
, IppiSize
roiSize
);
Case 3: Conversion from planar to pixel-order data
IppStatus ippiYCbCr422ToRGB_8u_P3C3R(const Ipp8u*
pSrc
[3], int
srcStep
[3], Ipp8u*
pDst
, int
dstStep
, 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 for pixel-order image. An array of pointers to ROI in each separate source planes for planar images.
srcStep
Distance, in bytes, between the starting points of consecutive lines in the source image.
pDst
Pointer to the ROI in the destination pixel-order image. An array of pointers to ROI in each planes of the destination planar image.
dstStep
Distance, in bytes, between the starting points of consecutive lines in the destination image.
roiSize
Size of the source and destination ROI in pixels.
aval
Constant value to create the 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
4:2:2 sampling
(see Table
“Pixel-Order Image Formats”
and Table
“Planar Image Formats”
for more details) to the gamma-corrected
R'G'B'
image
pDst
according to the same formulas as the function
ippiYCbCrToRGB
does. The output
R'G'B'
values are saturated to the range [0..255].
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.

Example

The code example below demonstrates how to use the
ippiYCbCr422ToRGB_8u_C2C4R
function.
const int WIDTH = 2; const int HEIGHT = 2; Ipp8u pSrc[WIDTH * HEIGHT * 2] = { 236,50,236,80, 236,50,236,80, }; Ipp8u pDstRGB[(WIDTH * HEIGHT) * 4]; int srcStep = WIDTH * 2, dstStep = WIDTH * 4; IppiSize roiSize = {WIDTH, HEIGHT}; Ipp8u alphaValue = 0xFF; IppStatus status = ippiYCbCr422ToRGB_8u_C2C4R(pSrc, srcStep, pDstRGB, dstStep, roiSize, alphaValue); if ( status == ippStsNoErr) printf("\n ************* passed ****************\n"); else printf("\n ************* failed ****************\n");

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804