Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

RGBToYCbCr422

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

Syntax

Case 1: Operation on pixel-order data
IppStatus ippiRGBToYCbCr422_8u_C3C2R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
);
Case 2; Conversion from pixel-order to planar data
IppStatus ippiRGBToYCbCr422_8u_C3P3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
[3], int
dstStep
[3], IppiSize
roiSize
);
Case 2: Conversion from planar to pixel-order data
IppStatus ippiRGBToYCbCr422_8u_P3C2R(const Ipp8u*
pSrc
[3], int
srcStep
, 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 color planes for planar images.
srcStep
Distance in bytes between starts of consecutive lines in the source image.
pDst
Pointer to the destination image ROI for pixel-order image. An array of pointer to ROI in each separate planes for the planar destination image.
dstStep
Distance in bytes between starts of consecutive lines in the destination image.
roiSize
Size of the source and destination ROI in pixels.
Description
This function operates with ROI (see Regions of Interest in Intel IPP). This function converts the gamma-corrected
R'G'B'
image
pSrc
to the
Y'Cb'Cr'
image
pDst
with
4:2:2 sampling
(see Table
“Pixel-Order Image Formats”
and Table
“Planar Image Formats”
for more details). The conversion is performed according to the same formulas as the function
ippiRGBToYCbCr
does.
The converted buffer for pixel-order image has the reduced bit depth of a 16 bits per pixel, whereas the source buffer has 24 bit depth.
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.

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