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#include "libavutil/attributes.h"
21#include "libavutil/cpu.h"
22#include "libavutil/x86/cpu.h"
23#include "libavcodec/avcodec.h"
24#include "libavcodec/idctdsp.h"
25#include "idctdsp.h"
26#include "simple_idct.h"
27
28/* Input permutation for the simple_idct_mmx */
29static const uint8_t simple_mmx_permutation[64] = {
30    0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
31    0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
32    0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
33    0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
34    0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
35    0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
36    0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
37    0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
38};
39
40static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
41
42av_cold int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,
43                                              enum idct_permutation_type perm_type)
44{
45    int i;
46
47    switch (perm_type) {
48    case FF_IDCT_PERM_SIMPLE:
49        for (i = 0; i < 64; i++)
50            idct_permutation[i] = simple_mmx_permutation[i];
51        return 1;
52    case FF_IDCT_PERM_SSE2:
53        for (i = 0; i < 64; i++)
54            idct_permutation[i] = (i & 0x38) | idct_sse2_row_perm[i & 7];
55        return 1;
56    }
57
58    return 0;
59}
60
61av_cold void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
62                                 unsigned high_bit_depth)
63{
64    int cpu_flags = av_get_cpu_flags();
65
66#if ARCH_X86_32
67    if (EXTERNAL_MMX(cpu_flags)) {
68        if (!high_bit_depth &&
69            avctx->lowres == 0 &&
70            (avctx->idct_algo == FF_IDCT_AUTO ||
71                avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
72                avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
73                c->idct      = ff_simple_idct_mmx;
74        }
75    }
76#endif
77
78    if (EXTERNAL_SSE2(cpu_flags)) {
79        c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_sse2;
80        c->put_pixels_clamped        = ff_put_pixels_clamped_sse2;
81        c->add_pixels_clamped        = ff_add_pixels_clamped_sse2;
82
83#if ARCH_X86_32
84        if (!high_bit_depth &&
85            avctx->lowres == 0 &&
86            (avctx->idct_algo == FF_IDCT_AUTO ||
87                avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
88                avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
89                c->idct_put  = ff_simple_idct_put_sse2;
90                c->idct_add  = ff_simple_idct_add_sse2;
91                c->perm_type = FF_IDCT_PERM_SIMPLE;
92        }
93#endif
94
95        if (ARCH_X86_64 &&
96            !high_bit_depth &&
97            avctx->lowres == 0 &&
98            (avctx->idct_algo == FF_IDCT_AUTO ||
99                avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
100                avctx->idct_algo == FF_IDCT_SIMPLEMMX ||
101                avctx->idct_algo == FF_IDCT_SIMPLE)) {
102                c->idct      = ff_simple_idct8_sse2;
103                c->idct_put  = ff_simple_idct8_put_sse2;
104                c->idct_add  = ff_simple_idct8_add_sse2;
105                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
106        }
107    }
108
109    if (ARCH_X86_64 && avctx->lowres == 0) {
110        if (EXTERNAL_AVX(cpu_flags) &&
111            !high_bit_depth &&
112            (avctx->idct_algo == FF_IDCT_AUTO ||
113                avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
114                avctx->idct_algo == FF_IDCT_SIMPLEMMX ||
115                avctx->idct_algo == FF_IDCT_SIMPLE)) {
116                c->idct      = ff_simple_idct8_avx;
117                c->idct_put  = ff_simple_idct8_put_avx;
118                c->idct_add  = ff_simple_idct8_add_avx;
119                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
120        }
121
122        if (avctx->bits_per_raw_sample == 10 &&
123            avctx->codec_id != AV_CODEC_ID_MPEG4 &&
124            (avctx->idct_algo == FF_IDCT_AUTO ||
125             avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
126             avctx->idct_algo == FF_IDCT_SIMPLE)) {
127            if (EXTERNAL_SSE2(cpu_flags)) {
128                c->idct_put  = ff_simple_idct10_put_sse2;
129                c->idct_add  = NULL;
130                c->idct      = ff_simple_idct10_sse2;
131                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
132
133            }
134            if (EXTERNAL_AVX(cpu_flags)) {
135                c->idct_put  = ff_simple_idct10_put_avx;
136                c->idct_add  = NULL;
137                c->idct      = ff_simple_idct10_avx;
138                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
139            }
140        }
141
142        if (avctx->bits_per_raw_sample == 12 &&
143            (avctx->idct_algo == FF_IDCT_AUTO ||
144             avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
145            if (EXTERNAL_SSE2(cpu_flags)) {
146                c->idct_put  = ff_simple_idct12_put_sse2;
147                c->idct_add  = NULL;
148                c->idct      = ff_simple_idct12_sse2;
149                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
150            }
151            if (EXTERNAL_AVX(cpu_flags)) {
152                c->idct_put  = ff_simple_idct12_put_avx;
153                c->idct_add  = NULL;
154                c->idct      = ff_simple_idct12_avx;
155                c->perm_type = FF_IDCT_PERM_TRANSPOSE;
156            }
157        }
158    }
159}
160