dsputil: Move MMX/SSE2-optimized IDCT bits to the x86 subdirectory
[ffmpeg.git] / libavcodec / x86 / dsputil_init.c
1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; 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/dsputil.h"
25 #include "libavcodec/simple_idct.h"
26 #include "dsputil_x86.h"
27 #include "idct_xvid.h"
28
29 /* Input permutation for the simple_idct_mmx */
30 static const uint8_t simple_mmx_permutation[64] = {
31     0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
32     0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
33     0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
34     0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
35     0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
36     0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
37     0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
38     0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
39 };
40
41 static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
42
43 av_cold int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,
44                                               int idct_permutation_type)
45 {
46     int i;
47
48     switch (idct_permutation_type) {
49     case FF_SIMPLE_IDCT_PERM:
50         for (i = 0; i < 64; i++)
51             idct_permutation[i] = simple_mmx_permutation[i];
52         return 1;
53     case FF_SSE2_IDCT_PERM:
54         for (i = 0; i < 64; i++)
55             idct_permutation[i] = (i & 0x38) | idct_sse2_row_perm[i & 7];
56         return 1;
57     }
58
59     return 0;
60 }
61
62 static av_cold void dsputil_init_mmx(DSPContext *c, AVCodecContext *avctx,
63                                      int cpu_flags, unsigned high_bit_depth)
64 {
65 #if HAVE_MMX_INLINE
66     c->put_pixels_clamped        = ff_put_pixels_clamped_mmx;
67     c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
68     c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
69
70     if (!high_bit_depth) {
71         c->draw_edges   = ff_draw_edges_mmx;
72
73         switch (avctx->idct_algo) {
74         case FF_IDCT_AUTO:
75         case 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->idct_permutation_type = FF_SIMPLE_IDCT_PERM;
80             break;
81         case FF_IDCT_XVIDMMX:
82             c->idct_put              = ff_idct_xvid_mmx_put;
83             c->idct_add              = ff_idct_xvid_mmx_add;
84             c->idct                  = ff_idct_xvid_mmx;
85             break;
86         }
87     }
88 #endif /* HAVE_MMX_INLINE */
89 }
90
91 static av_cold void dsputil_init_mmxext(DSPContext *c, AVCodecContext *avctx,
92                                         int cpu_flags, unsigned high_bit_depth)
93 {
94 #if HAVE_MMXEXT_INLINE
95     if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX) {
96         c->idct_put = ff_idct_xvid_mmxext_put;
97         c->idct_add = ff_idct_xvid_mmxext_add;
98         c->idct     = ff_idct_xvid_mmxext;
99     }
100 #endif /* HAVE_MMXEXT_INLINE */
101 }
102
103 static av_cold void dsputil_init_sse2(DSPContext *c, AVCodecContext *avctx,
104                                       int cpu_flags, unsigned high_bit_depth)
105 {
106 #if HAVE_SSE2_INLINE
107     if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX) {
108         c->idct_put              = ff_idct_xvid_sse2_put;
109         c->idct_add              = ff_idct_xvid_sse2_add;
110         c->idct                  = ff_idct_xvid_sse2;
111         c->idct_permutation_type = FF_SSE2_IDCT_PERM;
112     }
113 #endif /* HAVE_SSE2_INLINE */
114 }
115
116 av_cold void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx,
117                                  unsigned high_bit_depth)
118 {
119     int cpu_flags = av_get_cpu_flags();
120
121     if (X86_MMX(cpu_flags))
122         dsputil_init_mmx(c, avctx, cpu_flags, high_bit_depth);
123
124     if (X86_MMXEXT(cpu_flags))
125         dsputil_init_mmxext(c, avctx, cpu_flags, high_bit_depth);
126
127     if (X86_SSE2(cpu_flags))
128         dsputil_init_sse2(c, avctx, cpu_flags, high_bit_depth);
129
130     if (CONFIG_ENCODERS)
131         ff_dsputilenc_init_mmx(c, avctx, high_bit_depth);
132 }