1/*
2 * Copyright (C) 2007-2008 ARM Limited
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17/**
18 *
19 * File Name:  armVCCOMM_SAD.c
20 * OpenMAX DL: v1.0.2
21 * Revision:   9641
22 * Date:       Thursday, February 7, 2008
23 *
24 *
25 *
26 * Description:
27 * This function will calculate SAD for NxM blocks
28 *
29 */
30
31#include "omxtypes.h"
32#include "armOMX.h"
33#include "omxVC.h"
34
35#include "armCOMM.h"
36
37/**
38 * Function: armVCCOMM_SAD
39 *
40 * Description:
41 * This function calculate the SAD for NxM blocks.
42 *
43 * Remarks:
44 *
45 * [in]		pSrcOrg		Pointer to the original block
46 * [in]		iStepOrg	Step of the original block buffer
47 * [in]		pSrcRef		Pointer to the reference block
48 * [in]		iStepRef	Step of the reference block buffer
49 * [in]		iHeight		Height of the block
50 * [in]		iWidth		Width of the block
51 * [out]	pDstSAD		Pointer of result SAD
52 *
53 * Return Value:
54 * Standard OMXResult value.
55 *
56 */
57OMXResult armVCCOMM_SAD(
58	const OMX_U8* 	pSrcOrg,
59	OMX_U32 	iStepOrg,
60	const OMX_U8* 	pSrcRef,
61	OMX_U32 	iStepRef,
62	OMX_S32*	pDstSAD,
63	OMX_U32		iHeight,
64	OMX_U32		iWidth
65)
66{
67    OMX_INT     x, y;
68
69    /* check for argument error */
70    armRetArgErrIf(pSrcOrg == NULL, OMX_Sts_BadArgErr)
71    armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr)
72    armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr)
73
74    *pDstSAD = 0;
75    for (y = 0; y < iHeight; y++)
76    {
77        for (x = 0; x < iWidth; x++)
78        {
79            *pDstSAD += armAbs(pSrcOrg [(y * iStepOrg) + x] -
80                       pSrcRef [(y * iStepRef) + x]);
81        }
82    }
83
84    return OMX_Sts_NoErr;
85}
86
87/*****************************************************************************
88 *                              END OF FILE
89 *****************************************************************************/
90
91