1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/**
*
* File Name: omxVCM4P2_BlockMatch_Integer_8x8.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
*
*
*
* Description:
* Contains modules for Block matching, a full search algorithm
* is implemented
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armVC.h"
#include "armCOMM.h"
/**
* Function: omxVCM4P2_BlockMatch_Integer_8x8 (6.2.4.2.2)
*
* Description:
* Performs an 8x8 block search; estimates motion vector and associated
* minimum SAD. Both the input and output motion vectors are represented
* using half-pixel units, and therefore a shift left or right by 1 bit may be
* required, respectively, to match the input or output MVs with other
* functions that either generate output MVs or expect input MVs represented
* using integer pixel units.
*
* Input Arguments:
*
* pSrcRefBuf - pointer to the reference Y plane; points to the reference
* block that corresponds to the location of the current 8x8 block
* in the current plane.
* refWidth - width of the reference plane
* pRefRect - pointer to the valid reference plane rectangle; coordinates
* are specified relative to the image origin. Rectangle
* boundaries may extend beyond image boundaries if the image has
* been padded.
* pSrcCurrBuf - pointer to the current block in the current macroblock
* buffer extracted from the original plane (linear array, 128
* entries); must be aligned on an 8-byte boundary. The number of
* bytes between lines (step) is 16 bytes.
* pCurrPointPos - position of the current block in the current plane
* pSrcPreMV - pointer to predicted motion vector; NULL indicates no
* predicted MV
* pSrcPreSAD - pointer to SAD associated with the predicted MV (referenced
* by pSrcPreMV); may be set to NULL if unavailable.
* pMESpec - vendor-specific motion estimation specification structure;
* must have been allocated and then initialized using
* omxVCM4P2_MEInit prior to calling the block matching function.
*
* Output Arguments:
*
* pDstMV - pointer to estimated MV
* pDstSAD - pointer to minimum SAD
*
* Return Value:
*
* OMX_Sts_NoErr - no error
* OMX_Sts_BadArgErr - bad arguments. Returned if one of the following
* conditions is true:
* - at least one of the following pointers is NULL: pSrcRefBuf,
* pRefRect, pSrcCurrBuff, pCurrPointPos, pDstMV, pDstSAD or
* pMESpec, or
* - pSrcCurrBuf is not 8-byte aligned
*
*/
OMXResult omxVCM4P2_BlockMatch_Integer_8x8(
const OMX_U8 *pSrcRefBuf,
OMX_INT refWidth,
const OMXRect *pRefRect,
const OMX_U8 *pSrcCurrBuf,
const OMXVCM4P2Coordinate *pCurrPointPos,
const OMXVCMotionVector *pSrcPreMV,
const OMX_INT *pSrcPreSAD,
void *pMESpec,
OMXVCMotionVector *pDstMV,
OMX_INT *pDstSAD
)
{
OMX_U8 BlockSize = 8;
/* Argument error checks */
armRetArgErrIf(!armIs8ByteAligned(pSrcCurrBuf), OMX_Sts_BadArgErr);
return ( armVCM4P2_BlockMatch_Integer(
pSrcRefBuf,
refWidth,
pRefRect,
pSrcCurrBuf,
pCurrPointPos,
pSrcPreMV,
pSrcPreSAD,
pMESpec,
pDstMV,
pDstSAD,
BlockSize)
);
}
/* End of file */
|
