BGR565ToYUV420, BGR555ToYUV420

Convert 16-bit BGR image to the 4:2:0 YUV image.

Syntax

IppStatus ippiBGR565ToYUV420_16u8u_C3P3R(const Ipp16u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);

IppStatus ippiBGR555ToYUV420_16u8u_C3P3R(const Ipp16u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Array of pointers to ROI in the separate color planes in the destination image.
dstStep	Array of istances in bytes between starts of consecutive lines in the destination image planes.
roiSize	Size of the source and destination ROI in pixels.

Description

The functions ippiBGR565ToYUV420, ippiBGR555ToYUV420 are declared in the ippcc.h file. They operate with ROI (see Regions of Interest in Intel IPP).

These functions convert the gamma-corrected B'G'R' image pSrc to the Y'U'V' image pDst according to the same formulas as the function ippiRGBToYUV does. The source image pSrc is a packed 16-bit BGR image with reduced bit depth; all 3 channel intensities for a pixel are packed into two consecutive bytes (16u data type). It can be in one of two possible formats (see Figure 16-bit Pixel Formats): BGR565 (5 bits for blue, 6 bits for green, 5 bits for red), and BGR555 (5 bits for blue, green, red). The destination image pDst has a 4:2:0 sampling format (see Table “Planar Image Formats” for more details).

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.width is less than 2 or roiSize.height is less than 0.