xref: /aosp_15_r20/external/libmpeg2/common/icv_sad.c (revision a97c2a1f0a796dc32bed80d3353c69c5fc07c750)
1*a97c2a1fSXin Li /******************************************************************************
2*a97c2a1fSXin Li  *
3*a97c2a1fSXin Li  * Copyright (C) 2015 The Android Open Source Project
4*a97c2a1fSXin Li  *
5*a97c2a1fSXin Li  * Licensed under the Apache License, Version 2.0 (the "License");
6*a97c2a1fSXin Li  * you may not use this file except in compliance with the License.
7*a97c2a1fSXin Li  * You may obtain a copy of the License at:
8*a97c2a1fSXin Li  *
9*a97c2a1fSXin Li  * http://www.apache.org/licenses/LICENSE-2.0
10*a97c2a1fSXin Li  *
11*a97c2a1fSXin Li  * Unless required by applicable law or agreed to in writing, software
12*a97c2a1fSXin Li  * distributed under the License is distributed on an "AS IS" BASIS,
13*a97c2a1fSXin Li  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14*a97c2a1fSXin Li  * See the License for the specific language governing permissions and
15*a97c2a1fSXin Li  * limitations under the License.
16*a97c2a1fSXin Li  *
17*a97c2a1fSXin Li  *****************************************************************************
18*a97c2a1fSXin Li  * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19*a97c2a1fSXin Li */
20*a97c2a1fSXin Li /**
21*a97c2a1fSXin Li *******************************************************************************
22*a97c2a1fSXin Li * @file
23*a97c2a1fSXin Li *  icv_sad.c
24*a97c2a1fSXin Li *
25*a97c2a1fSXin Li * @brief
26*a97c2a1fSXin Li *  This file contains the functions to compute SAD
27*a97c2a1fSXin Li *
28*a97c2a1fSXin Li * @author
29*a97c2a1fSXin Li *  Ittiam
30*a97c2a1fSXin Li *
31*a97c2a1fSXin Li * @par List of Functions:
32*a97c2a1fSXin Li *  sad_8x4()
33*a97c2a1fSXin Li *
34*a97c2a1fSXin Li * @remarks
35*a97c2a1fSXin Li *  None
36*a97c2a1fSXin Li *
37*a97c2a1fSXin Li *******************************************************************************
38*a97c2a1fSXin Li */
39*a97c2a1fSXin Li /*****************************************************************************/
40*a97c2a1fSXin Li /* File Includes                                                             */
41*a97c2a1fSXin Li /*****************************************************************************/
42*a97c2a1fSXin Li /* System include files */
43*a97c2a1fSXin Li #include <stdio.h>
44*a97c2a1fSXin Li #include <stdint.h>
45*a97c2a1fSXin Li #include <string.h>
46*a97c2a1fSXin Li #include <stdlib.h>
47*a97c2a1fSXin Li #include <assert.h>
48*a97c2a1fSXin Li 
49*a97c2a1fSXin Li /* User include files */
50*a97c2a1fSXin Li #include "icv_datatypes.h"
51*a97c2a1fSXin Li #include "icv_macros.h"
52*a97c2a1fSXin Li #include "icv_platform_macros.h"
53*a97c2a1fSXin Li #include "icv.h"
54*a97c2a1fSXin Li 
55*a97c2a1fSXin Li /**
56*a97c2a1fSXin Li *******************************************************************************
57*a97c2a1fSXin Li *
58*a97c2a1fSXin Li * @brief
59*a97c2a1fSXin Li *  Compute 8x4 SAD
60*a97c2a1fSXin Li *
61*a97c2a1fSXin Li * @par   Description
62*a97c2a1fSXin Li *  Compute 8x4 sum of absolute differences between source and reference block
63*a97c2a1fSXin Li *
64*a97c2a1fSXin Li * @param[in] pu1_src
65*a97c2a1fSXin Li *  Source buffer
66*a97c2a1fSXin Li *
67*a97c2a1fSXin Li * @param[in] pu1_ref
68*a97c2a1fSXin Li *  Reference buffer
69*a97c2a1fSXin Li *
70*a97c2a1fSXin Li * @param[in] src_strd
71*a97c2a1fSXin Li *  Source stride
72*a97c2a1fSXin Li *
73*a97c2a1fSXin Li * @param[in] ref_strd
74*a97c2a1fSXin Li *  Reference stride
75*a97c2a1fSXin Li *
76*a97c2a1fSXin Li * @param[in] wd
77*a97c2a1fSXin Li *  Assumed to be 8
78*a97c2a1fSXin Li *
79*a97c2a1fSXin Li * @param[in] ht
80*a97c2a1fSXin Li *  Assumed to be 4
81*a97c2a1fSXin Li 
82*a97c2a1fSXin Li * @returns
83*a97c2a1fSXin Li *  SAD
84*a97c2a1fSXin Li *
85*a97c2a1fSXin Li * @remarks
86*a97c2a1fSXin Li *
87*a97c2a1fSXin Li *******************************************************************************
88*a97c2a1fSXin Li */
icv_sad_8x4(UWORD8 * pu1_src,UWORD8 * pu1_ref,WORD32 src_strd,WORD32 ref_strd,WORD32 wd,WORD32 ht)89*a97c2a1fSXin Li WORD32 icv_sad_8x4(UWORD8 *pu1_src,
90*a97c2a1fSXin Li                    UWORD8 *pu1_ref,
91*a97c2a1fSXin Li                    WORD32 src_strd,
92*a97c2a1fSXin Li                    WORD32 ref_strd,
93*a97c2a1fSXin Li                    WORD32 wd,
94*a97c2a1fSXin Li                    WORD32 ht)
95*a97c2a1fSXin Li {
96*a97c2a1fSXin Li     WORD32 sad;
97*a97c2a1fSXin Li     WORD32 i;
98*a97c2a1fSXin Li     WORD32 j;
99*a97c2a1fSXin Li     UNUSED(wd);
100*a97c2a1fSXin Li     UNUSED(ht);
101*a97c2a1fSXin Li 
102*a97c2a1fSXin Li     ASSERT(wd == 8);
103*a97c2a1fSXin Li     ASSERT(ht == 4);
104*a97c2a1fSXin Li 
105*a97c2a1fSXin Li     sad = 0;
106*a97c2a1fSXin Li 
107*a97c2a1fSXin Li     for(j = 0; j < 4; j++)
108*a97c2a1fSXin Li     {
109*a97c2a1fSXin Li         for(i = 0; i < 8; i++)
110*a97c2a1fSXin Li         {
111*a97c2a1fSXin Li             WORD32 src;
112*a97c2a1fSXin Li             WORD32 ref;
113*a97c2a1fSXin Li 
114*a97c2a1fSXin Li             src = *pu1_src++;
115*a97c2a1fSXin Li             ref = *pu1_ref++;
116*a97c2a1fSXin Li 
117*a97c2a1fSXin Li             sad += ABS_DIF(src, ref);
118*a97c2a1fSXin Li         }
119*a97c2a1fSXin Li         pu1_src += (src_strd - 8);
120*a97c2a1fSXin Li         pu1_ref += (ref_strd - 8);
121*a97c2a1fSXin Li     }
122*a97c2a1fSXin Li 
123*a97c2a1fSXin Li     return sad;
124*a97c2a1fSXin Li }
125