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
23
24 #if CONFIG_PIXELUTILS
25
27
29 const uint8_t *src2, ptrdiff_t stride2,
31 {
32 int x, y, sum = 0;
33
34 for (y = 0; y <
h; y++) {
35 for (x = 0; x <
w; x++)
36 sum += abs(src1[x] - src2[x]);
37 src1 += stride1;
38 src2 += stride2;
39 }
40 return sum;
41 }
42
43 #define DECLARE_BLOCK_FUNCTIONS(size) \
44 static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \
45 const uint8_t *src2, ptrdiff_t stride2) \
46 { \
47 return sad_wxh(src1, stride1, src2, stride2, size, size); \
48 }
49
50 DECLARE_BLOCK_FUNCTIONS(2)
51 DECLARE_BLOCK_FUNCTIONS(4)
52 DECLARE_BLOCK_FUNCTIONS(8)
53 DECLARE_BLOCK_FUNCTIONS(16)
54
56 block_sad_2x2_c,
57 block_sad_4x4_c,
58 block_sad_8x8_c,
59 block_sad_16x16_c,
60 };
61
62 #endif /* CONFIG_PIXELUTILS */
63
65 {
66 #if !CONFIG_PIXELUTILS
68 "but libavutil is not compiled with it\n");
70 #else
72
73 memcpy(sad, sad_c, sizeof(sad));
74
78 if (w_bits != h_bits) // only squared sad for now
80
81 #if ARCH_X86
83 #endif
84
85 return sad[w_bits - 1];
86 #endif
87 }
static int aligned(int val)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned)
int(* av_pixelutils_sad_fn)(const uint8_t *src1, ptrdiff_t stride1, const uint8_t *src2, ptrdiff_t stride2)
Sum of abs(src1[x] - src2[x])
common internal API header
#define FF_ARRAY_ELEMS(a)
av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
Get a potentially optimized pointer to a Sum-of-absolute-differences function (see the av_pixelutils_...
common internal and external API header