1 /******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 /**
21 *******************************************************************************
22 * @file
23 * icv_sad.c
24 *
25 * @brief
26 * This file contains the functions to compute SAD
27 *
28 * @author
29 * Ittiam
30 *
31 * @par List of Functions:
32 * sad_8x4()
33 *
34 * @remarks
35 * None
36 *
37 *******************************************************************************
38 */
39 /*****************************************************************************/
40 /* File Includes */
41 /*****************************************************************************/
42 /* System include files */
43 #include <stdio.h>
44 #include <stdint.h>
45 #include <string.h>
46 #include <stdlib.h>
47 #include <assert.h>
48
49 /* User include files */
50 #include "icv_datatypes.h"
51 #include "icv_macros.h"
52 #include "icv_platform_macros.h"
53 #include "icv.h"
54
55 /**
56 *******************************************************************************
57 *
58 * @brief
59 * Compute 8x4 SAD
60 *
61 * @par Description
62 * Compute 8x4 sum of absolute differences between source and reference block
63 *
64 * @param[in] pu1_src
65 * Source buffer
66 *
67 * @param[in] pu1_ref
68 * Reference buffer
69 *
70 * @param[in] src_strd
71 * Source stride
72 *
73 * @param[in] ref_strd
74 * Reference stride
75 *
76 * @param[in] wd
77 * Assumed to be 8
78 *
79 * @param[in] ht
80 * Assumed to be 4
81
82 * @returns
83 * SAD
84 *
85 * @remarks
86 *
87 *******************************************************************************
88 */
icv_sad_8x4(UWORD8 * pu1_src,UWORD8 * pu1_ref,WORD32 src_strd,WORD32 ref_strd,WORD32 wd,WORD32 ht)89 WORD32 icv_sad_8x4(UWORD8 *pu1_src,
90 UWORD8 *pu1_ref,
91 WORD32 src_strd,
92 WORD32 ref_strd,
93 WORD32 wd,
94 WORD32 ht)
95 {
96 WORD32 sad;
97 WORD32 i;
98 WORD32 j;
99 UNUSED(wd);
100 UNUSED(ht);
101
102 ASSERT(wd == 8);
103 ASSERT(ht == 4);
104
105 sad = 0;
106
107 for(j = 0; j < 4; j++)
108 {
109 for(i = 0; i < 8; i++)
110 {
111 WORD32 src;
112 WORD32 ref;
113
114 src = *pu1_src++;
115 ref = *pu1_ref++;
116
117 sad += ABS_DIF(src, ref);
118 }
119 pu1_src += (src_strd - 8);
120 pu1_ref += (ref_strd - 8);
121 }
122
123 return sad;
124 }
125