mediaLib Library Functions mlib_VideoSumAbsDiff(3MLIB)
NAME
mlib_VideoSumAbsDiff - motion estimation
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include
mlib_s32 mlib_VideoSumAbsDiff(mlib_u8 *curr_block,
const mlib_u8 *ref_block, mlib_s32 width, mlib_s32 height,
mlib_s32 stride);
DESCRIPTION
The mlib_VideoSumAbsDiff() 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:curr_block Pointer to the current block. curr_block must
be 8-byte aligned.
ref_block 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 mlib_s32.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:SunOS 5.11 Last change: 2 Mar 2007 1
mediaLib Library Functions mlib_VideoSumAbsDiff(3MLIB)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Interface Stability | Committed ||_____________________________|_____________________________|
| MT-Level | MT-Safe |
|_____________________________|_____________________________|
SEE ALSO
attributes(5)SunOS 5.11 Last change: 2 Mar 2007 2