mediaLib Library Functions            mlibVideoSumAbsDiff(3MLIB)



NAME
     mlibVideoSumAbsDiff - motion estimation

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

     mlibs32 mlibVideoSumAbsDiff(mlibu8 *currblock,
          const mlibu8 *refblock, mlibs32 width, mlibs32 height,
          mlibs32 stride);


DESCRIPTION
     The mlibVideoSumAbsDiff()  function  computes  the  sum  of
     absolute differences between the pixels in the current block
     and the corresponding pixels in the reference block.


     Both the current block and the  reference  block  belong  to
     frames with the same dimension. (The stride is applicable to
     both.) Motion estimation computes the sum  of  the  absolute
     differences  between  the current block and reference blocks
     at different locations in the reference frame, choosing  the
     best fit (least sum of absolute difference) to calculate the
     motion vector.

PARAMETERS
     The function takes the following arguments:

     currblock    Pointer to the current block. currblock  must
                   be 8-byte aligned.


     refblock     Pointer to the reference block.


     width         Width of the block.


     height        Height of the block.


     stride        Stride, in bytes, between adjacent rows  in  a
                   block. stride must be a multiple of eight.


RETURN VALUES
     The function returns a value of type mlibs32.

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



SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions            mlibVideoSumAbsDiff(3MLIB)



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


SEE ALSO
     attributes(5)












































SunOS 5.11           Last change: 2 Mar 2007                    2