1/*
2 * SIMD-optimized lossless video encoding functions
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include "libavutil/attributes.h"
26#include "libavutil/cpu.h"
27#include "libavutil/x86/asm.h"
28#include "libavutil/x86/cpu.h"
29#include "libavcodec/lossless_videoencdsp.h"
30#include "libavcodec/mathops.h"
31
32void ff_diff_bytes_sse2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
33                        intptr_t w);
34void ff_diff_bytes_avx2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
35                        intptr_t w);
36
37void ff_sub_left_predict_avx(uint8_t *dst, uint8_t *src,
38                            ptrdiff_t stride, ptrdiff_t width, int height);
39
40#if HAVE_INLINE_ASM
41
42static void sub_median_pred_mmxext(uint8_t *dst, const uint8_t *src1,
43                                   const uint8_t *src2, intptr_t w,
44                                   int *left, int *left_top)
45{
46    x86_reg i = 0;
47    uint8_t l, lt;
48
49    __asm__ volatile (
50        "movq  (%1, %0), %%mm0          \n\t" // LT
51        "psllq $8, %%mm0                \n\t"
52        "1:                             \n\t"
53        "movq  (%1, %0), %%mm1          \n\t" // T
54        "movq  -1(%2, %0), %%mm2        \n\t" // L
55        "movq  (%2, %0), %%mm3          \n\t" // X
56        "movq %%mm2, %%mm4              \n\t" // L
57        "psubb %%mm0, %%mm2             \n\t"
58        "paddb %%mm1, %%mm2             \n\t" // L + T - LT
59        "movq %%mm4, %%mm5              \n\t" // L
60        "pmaxub %%mm1, %%mm4            \n\t" // max(T, L)
61        "pminub %%mm5, %%mm1            \n\t" // min(T, L)
62        "pminub %%mm2, %%mm4            \n\t"
63        "pmaxub %%mm1, %%mm4            \n\t"
64        "psubb %%mm4, %%mm3             \n\t" // dst - pred
65        "movq %%mm3, (%3, %0)           \n\t"
66        "add $8, %0                     \n\t"
67        "movq -1(%1, %0), %%mm0         \n\t" // LT
68        "cmp %4, %0                     \n\t"
69        " jb 1b                         \n\t"
70        : "+r" (i)
71        : "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w));
72
73    l  = *left;
74    lt = *left_top;
75
76    dst[0] = src2[0] - mid_pred(l, src1[0], (l + src1[0] - lt) & 0xFF);
77
78    *left_top = src1[w - 1];
79    *left     = src2[w - 1];
80}
81
82#endif /* HAVE_INLINE_ASM */
83
84av_cold void ff_llvidencdsp_init_x86(LLVidEncDSPContext *c)
85{
86    av_unused int cpu_flags = av_get_cpu_flags();
87
88#if HAVE_INLINE_ASM
89    if (INLINE_MMXEXT(cpu_flags)) {
90        c->sub_median_pred = sub_median_pred_mmxext;
91    }
92#endif /* HAVE_INLINE_ASM */
93
94    if (EXTERNAL_SSE2(cpu_flags)) {
95        c->diff_bytes = ff_diff_bytes_sse2;
96    }
97
98    if (EXTERNAL_AVX(cpu_flags)) {
99        c->sub_left_predict = ff_sub_left_predict_avx;
100    }
101
102    if (EXTERNAL_AVX2_FAST(cpu_flags)) {
103        c->diff_bytes = ff_diff_bytes_avx2;
104    }
105}
106