RGB565ToYUV420

Syntax

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 distances in bytes between starts of consecutive lines in the destination image planes.
roiSize	Size of the source and destination ROI in pixels.

Description

The function ippiRGB565ToYUV420 is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function converts the gamma-corrected R'G'B' 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 RGB565 image with reduced bit depth; all 3 channel intensities for a pixel are packed into two consecutive bytes (16u data type) in the following order: 5 bits for red, 6 bits for green, 5 bits for blue (see Figure 16-bit Pixel Formats).

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.
ippStsDoubleSize	Indicates a warning if roiSize has a field that is not a multiple of 2.