2 * This file is part of FFmpeg.
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.
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.
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
21 #include "pixelutils.h"
26 #include "x86/pixelutils.h"
28 static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
29 const uint8_t *src2, ptrdiff_t stride2,
34 for (y = 0; y < h; y++) {
35 for (x = 0; x < w; x++)
36 sum += abs(src1[x] - src2[x]);
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) \
47 return sad_wxh(src1, stride1, src2, stride2, size, size); \
50 DECLARE_BLOCK_FUNCTIONS(2)
51 DECLARE_BLOCK_FUNCTIONS(4)
52 DECLARE_BLOCK_FUNCTIONS(8)
53 DECLARE_BLOCK_FUNCTIONS(16)
55 static const av_pixelutils_sad_fn sad_c[] = {
62 #endif /* CONFIG_PIXELUTILS */
64 av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
66 #if !CONFIG_PIXELUTILS
67 av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
68 "but libavutil is not compiled with it\n");
71 av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
73 memcpy(sad, sad_c, sizeof(sad));
75 if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
76 h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
78 if (w_bits != h_bits) // only squared sad for now
82 ff_pixelutils_sad_init_x86(sad, aligned);
85 return sad[w_bits - 1];