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
24int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
25                                 const uint8_t *src2, ptrdiff_t stride2);
26
27int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
28                                 const uint8_t *src2, ptrdiff_t stride2);
29int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
30                                   const uint8_t *src2, ptrdiff_t stride2);
31int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
32                                   const uint8_t *src2, ptrdiff_t stride2);
33
34int ff_pixelutils_sad_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
35                                 const uint8_t *src2, ptrdiff_t stride2);
36int ff_pixelutils_sad_a_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
37                                   const uint8_t *src2, ptrdiff_t stride2);
38int ff_pixelutils_sad_u_32x32_sse2(const uint8_t *src1, ptrdiff_t stride1,
39                                   const uint8_t *src2, ptrdiff_t stride2);
40
41int ff_pixelutils_sad_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
42                                 const uint8_t *src2, ptrdiff_t stride2);
43int ff_pixelutils_sad_a_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
44                                   const uint8_t *src2, ptrdiff_t stride2);
45int ff_pixelutils_sad_u_32x32_avx2(const uint8_t *src1, ptrdiff_t stride1,
46                                   const uint8_t *src2, ptrdiff_t stride2);
47
48void 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