avcodec/x86: add an 8-bit simple IDCT function based on the x86-64 high depth functions
[ffmpeg.git] / libavcodec / x86 / idctdsp_init.c
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 */
29 static 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
40 static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
41
42 av_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
61 av_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 (EXTERNAL_MMX(cpu_flags)) {
67         c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
68         c->put_pixels_clamped        = ff_put_pixels_clamped_mmx;
69         c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
70
71         if (!high_bit_depth &&
72             avctx->lowres == 0 &&
73             (avctx->idct_algo == FF_IDCT_AUTO ||
74                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
75                 avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
76                 c->idct_put  = ff_simple_idct_put_mmx;
77                 c->idct_add  = ff_simple_idct_add_mmx;
78                 c->idct      = ff_simple_idct_mmx;
79                 c->perm_type = FF_IDCT_PERM_SIMPLE;
80         }
81     }
82
83     if (EXTERNAL_SSE2(cpu_flags)) {
84         c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_sse2;
85         c->put_pixels_clamped        = ff_put_pixels_clamped_sse2;
86         c->add_pixels_clamped        = ff_add_pixels_clamped_sse2;
87
88         if (!high_bit_depth &&
89             avctx->lowres == 0 &&
90             (avctx->idct_algo == FF_IDCT_AUTO ||
91                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
92                 avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
93                 c->idct_put  = ff_simple_idct_put_sse2;
94                 c->idct_add  = ff_simple_idct_add_sse2;
95                 c->perm_type = FF_IDCT_PERM_SIMPLE;
96         }
97
98         if (ARCH_X86_64 &&
99             !high_bit_depth &&
100             avctx->lowres == 0 &&
101             (avctx->idct_algo == FF_IDCT_AUTO ||
102                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
103                 avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
104                 c->idct      = ff_simple_idct8_sse2;
105                 c->idct_put  = ff_simple_idct8_put_sse2;
106                 c->idct_add  = ff_simple_idct8_add_sse2;
107                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
108         }
109     }
110
111     if (ARCH_X86_64 && avctx->lowres == 0) {
112         if (EXTERNAL_AVX(cpu_flags) &&
113             !high_bit_depth &&
114             (avctx->idct_algo == FF_IDCT_AUTO ||
115                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
116                 avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
117                 c->idct      = ff_simple_idct8_avx;
118                 c->idct_put  = ff_simple_idct8_put_avx;
119                 c->idct_add  = ff_simple_idct8_add_avx;
120                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
121         }
122
123         if (avctx->bits_per_raw_sample == 10 &&
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 }