Manual Pages for UNIX Operating System command usage for man mlib_VideoColorRGB2JFIFYCC444_S16

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_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  com-
     ponents 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.



SunOS 5.11          Last change: 23 May 2007                    1






mediaLib Library Functions
                         mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)



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

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



     ____________________________________________________________
    |       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          Last change: 23 May 2007                    2






mediaLib Library Functions
                         mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)






















































SunOS 5.11          Last change: 23 May 2007                    3