opensolaris man page for mlib_videocolorrgb2jfifycc444_s16

mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)		    mediaLib Library Functions			  mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)

NAME
       mlib_VideoColorRGB2JFIFYCC444_S16 - RGB to JFIF YCbCr color conversion

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

       mlib_status mlib_VideoColorRGB2JFIFYCC444_S16(mlib_s16 *y, mlib_s16 *cb,
	    mlib_s16 *cr, const mlib_s16 *rgb, mlib_s32 n);

DESCRIPTION
       The  mlib_VideoColorRGB2JFIFYCC444_S16()  function performs color space conversion from RGB to YCbCr when used in the JPEG File Interchange
       Format (JFIF).

       Both the input RGB components and the output YCbCr components are supposed to be in the range of [0, 4095].

       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	+ 2048
	 Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B	+ 2048

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(3MLIB), attributes(5)

SunOS 5.11							    23 May 2007 			  mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)