mediaLib Library Functions   mlibVideoColorRGB2JFIFYC444(3MLIB)



NAME
     mlibVideoColorRGB2JFIFYC444 -  RGB  to  JFIF  YCbCr  color
     conversion

SYNOPSIS
     cc [ flag... ] file... -lmlib [ library... ]
     #include 

     mlibstatus mlibVideoColorRGB2JFIFYC444(mlibu8 *y, mlibu8 *cb,
          mlibu8 *cr, const mlibu8 *rgb, mlibs32 n);


DESCRIPTION
     The mlibVideoColorRGB2JFIFYC444() function performs  color
     space  conversion  from  RGB  to YCbCr when used in the JPEG
     File Interchange Format (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 MLIBSUCES if  successful.  Otherwise
     it returns MLIBFAILURE.



SunOS 5.11          Last change: 23 May 2007                    1






mediaLib Library Functions   mlibVideoColorRGB2JFIFYC444(3MLIB)



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



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     mlibVideoColorABGR2JFIFYC444(3MLIB),
     mlibVideoColorARGB2JFIFYC444(3MLIB),
     mlibVideoColorRGB2JFIFYC444S16(3MLIB), attributes(5)




































SunOS 5.11          Last change: 23 May 2007                    2