FFmpeg
scene_sad.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * Scene SAD functions
22  */
23 
24 #include "scene_sad.h"
25 
27 {
28  uint64_t sad = 0;
29  const uint16_t *src1w = (const uint16_t *)src1;
30  const uint16_t *src2w = (const uint16_t *)src2;
31  int x, y;
32 
33  stride1 /= 2;
34  stride2 /= 2;
35 
36  for (y = 0; y < height; y++) {
37  for (x = 0; x < width; x++)
38  sad += FFABS(src1w[x] - src2w[x]);
39  src1w += stride1;
40  src2w += stride2;
41  }
42  *sum = sad;
43 }
44 
46 {
47  uint64_t sad = 0;
48  int x, y;
49 
50  for (y = 0; y < height; y++) {
51  for (x = 0; x < width; x++)
52  sad += FFABS(src1[x] - src2[x]);
53  src1 += stride1;
54  src2 += stride2;
55  }
56  *sum = sad;
57 }
58 
60 {
61  ff_scene_sad_fn sad = NULL;
62  if (ARCH_X86)
63  sad = ff_scene_sad_get_fn_x86(depth);
64  if (!sad) {
65  if (depth == 8)
66  sad = ff_scene_sad_c;
67  if (depth == 16)
68  sad = ff_scene_sad16_c;
69  }
70  return sad;
71 }
72 
void ff_scene_sad_c(SCENE_SAD_PARAMS)
Definition: scene_sad.c:45
#define NULL
Definition: coverity.c:32
void(* ff_scene_sad_fn)(SCENE_SAD_PARAMS)
Definition: scene_sad.h:34
ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
Definition: scene_sad.c:59
#define height
#define SCENE_SAD_PARAMS
Definition: scene_sad.h:29
Scene SAD functions.
#define width
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
ff_scene_sad_fn ff_scene_sad_get_fn_x86(int depth)
#define src1
Definition: h264pred.c:139
void ff_scene_sad16_c(SCENE_SAD_PARAMS)
Definition: scene_sad.c:26