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 #include "config.h"
20
21 #include "pixelutils.h"
22 #include "cpu.h"
23
24 int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
25 const uint8_t *src2, ptrdiff_t stride2);
26
27 int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
28 const uint8_t *src2, ptrdiff_t stride2);
29 int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
30 const uint8_t *src2, ptrdiff_t stride2);
31 int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
32 const uint8_t *src2, ptrdiff_t stride2);
33
34 int ff_pixelutils_sad_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
35 const uint8_t *src2, ptrdiff_t stride2);
36 int ff_pixelutils_sad_a_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
37 const uint8_t *src2, ptrdiff_t stride2);
38 int ff_pixelutils_sad_u_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
39 const uint8_t *src2, ptrdiff_t stride2);
40
41 int ff_pixelutils_sad_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
42 const uint8_t *src2, ptrdiff_t stride2);
43 int ff_pixelutils_sad_a_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
44 const uint8_t *src2, ptrdiff_t stride2);
45 int ff_pixelutils_sad_u_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
46 const uint8_t *src2, ptrdiff_t stride2);
47
ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn * sad,int aligned)48 void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned)
49 {
50 int cpu_flags = av_get_cpu_flags();
51
52 // The best way to use SSE2 would be to do 2 SADs in parallel,
53 // but we'd have to modify the pixelutils API to return SIMD functions.
54
55 // It's probably not faster to shuffle data around
56 // to get two lines of 8 pixels into a single 16byte register,
57 // so just use the MMX 8x8 version even when SSE2 is available.
58 if (EXTERNAL_MMXEXT(cpu_flags)) {
59 sad[2] = ff_pixelutils_sad_8x8_mmxext;
60 }
61
62 if (EXTERNAL_SSE2(cpu_flags)) {
63 switch (aligned) {
64 case 0: sad[3] = ff_pixelutils_sad_16x16_sse2; break; // src1 unaligned, src2 unaligned
65 case 1: sad[3] = ff_pixelutils_sad_u_16x16_sse2; break; // src1 aligned, src2 unaligned
66 case 2: sad[3] = ff_pixelutils_sad_a_16x16_sse2; break; // src1 aligned, src2 aligned
67 }
68 }
69
70 if (EXTERNAL_SSE2(cpu_flags)) {
71 switch (aligned) {
72 case 0: sad[4] = ff_pixelutils_sad_32x32_sse2; break; // src1 unaligned, src2 unaligned
73 case 1: sad[4] = ff_pixelutils_sad_u_32x32_sse2; break; // src1 aligned, src2 unaligned
74 case 2: sad[4] = ff_pixelutils_sad_a_32x32_sse2; break; // src1 aligned, src2 aligned
75 }
76 }
77
78 if (EXTERNAL_AVX2_FAST(cpu_flags)) {
79 switch (aligned) {
80 case 0: sad[4] = ff_pixelutils_sad_32x32_avx2; break; // src1 unaligned, src2 unaligned
81 case 1: sad[4] = ff_pixelutils_sad_u_32x32_avx2; break; // src1 aligned, src2 unaligned
82 case 2: sad[4] = ff_pixelutils_sad_a_32x32_avx2; break; // src1 aligned, src2 aligned
83 }
84 }
85 }
86