opensolaris man page for mlib_videocolorrgb2jfifycc444

mlib_VideoColorRGB2JFIFYCC444(3MLIB)			    mediaLib Library Functions			      mlib_VideoColorRGB2JFIFYCC444(3MLIB)

NAME
       mlib_VideoColorRGB2JFIFYCC444 - RGB to JFIF YCbCr color conversion

SYNOPSIS
       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_VideoColorRGB2JFIFYCC444(mlib_u8 *y, mlib_u8 *cb,
	    mlib_u8 *cr, const mlib_u8 *rgb, mlib_s32 n);

DESCRIPTION
       The  mlib_VideoColorRGB2JFIFYCC444() function performs color space conversion from RGB to YCbCr when used in the JPEG File Interchange For-
       mat (JFIF).

       The following equation is used:

	 Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
	 Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B	+ 128
	 Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B	+ 128

PARAMETERS
       The function takes the following arguments:

       y      Pointer to destination Y component row. y must be 8-byte aligned.

       cb     Pointer to destination Cb component row. cb must be 8-byte aligned.

       cr     Pointer to destination Cr component row. cr must be 8-byte aligned.

       rgb    Pointer to source RGB multi-component row. rgb must be 8-byte aligned.

       n      Length of Y component row. The length of Cb and Cr component rows must be n. The length of the RGB multi-component row must be 3*n.

RETURN VALUES
       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       mlib_VideoColorABGR2JFIFYCC444(3MLIB), mlib_VideoColorARGB2JFIFYCC444(3MLIB), mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB), attributes(5)

SunOS 5.11							    23 May 2007 			      mlib_VideoColorRGB2JFIFYCC444(3MLIB)