armVCM4P2_CompareMV.c revision 0c1bc742181ded4930842b46e9507372f0b1b963 
1/**
2 *
3 * File Name:  armVCM4P2_CompareMV.c
4 * OpenMAX DL: v1.0.2
5 * Revision:   9641
6 * Date:       Thursday, February 7, 2008
7 *
8 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
9 *
10 *
11 *
12 * Description:
13 * Contains module for comparing motion vectors and SAD's to decide
14 * the best MV and SAD
15 *
16 */
17
18#include "omxtypes.h"
19#include "armOMX.h"
20
21#include "armVC.h"
22#include "armCOMM.h"
23
24/**
25 * Function: armVCM4P2_CompareMV
26 *
27 * Description:
28 * Performs comparision of motion vectors and SAD's to decide the
29 * best MV and SAD
30 *
31 * Remarks:
32 *
33 * Parameters:
34 * [in]	    mvX		x coordinate of the candidate motion vector
35 * [in]	    mvY		y coordinate of the candidate motion vector
36 * [in]	    candSAD	Candidate SAD
37 * [in]	    bestMVX	x coordinate of the best motion vector
38 * [in]	    bestMVY	y coordinate of the best motion vector
39 * [in]	    bestSAD	best SAD
40 *
41 * Return Value:
42 * OMX_INT -- 1 to indicate that the current sad is the best
43 *            0 to indicate that it is NOT the best SAD
44 */
45
46OMX_INT armVCM4P2_CompareMV (
47    OMX_S16 mvX,
48    OMX_S16 mvY,
49    OMX_INT candSAD,
50    OMX_S16 bestMVX,
51    OMX_S16 bestMVY,
52    OMX_INT bestSAD
53)
54{
55    if (candSAD < bestSAD)
56    {
57        return 1;
58    }
59    if (candSAD > bestSAD)
60    {
61        return 0;
62    }
63    /* shorter motion vector */
64    if ( (mvX * mvX + mvY * mvY) < (bestMVX*bestMVX+bestMVY*bestMVY) )
65    {
66         return 1;
67    }
68    return 0;
69}
70
71/*End of File*/
72