2 * This file is part of FFmpeg.
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.
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.
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
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"
26 #include "simple_idct.h"
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,
40 static const uint8_t idct_sse2_row_perm
[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
42 av_cold
int ff_init_scantable_permutation_x86(uint8_t *idct_permutation
,
43 enum idct_permutation_type perm_type
)
48 case FF_IDCT_PERM_SIMPLE
:
49 for (i
= 0; i
< 64; i
++)
50 idct_permutation
[i
] = simple_mmx_permutation
[i
];
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];
61 av_cold
void ff_idctdsp_init_x86(IDCTDSPContext
*c
, AVCodecContext
*avctx
,
62 unsigned high_bit_depth
)
64 int cpu_flags
= av_get_cpu_flags();
66 if (INLINE_MMX(cpu_flags
)) {
67 c
->put_pixels_clamped
= ff_put_pixels_clamped_mmx
;
68 c
->add_pixels_clamped
= ff_add_pixels_clamped_mmx
;
70 if (!high_bit_depth
&&
72 (avctx
->idct_algo
== FF_IDCT_AUTO
||
73 avctx
->idct_algo
== FF_IDCT_SIMPLEAUTO
||
74 avctx
->idct_algo
== FF_IDCT_SIMPLEMMX
)) {
75 c
->idct_put
= ff_simple_idct_put_mmx
;
76 c
->idct_add
= ff_simple_idct_add_mmx
;
77 c
->idct
= ff_simple_idct_mmx
;
78 c
->perm_type
= FF_IDCT_PERM_SIMPLE
;
81 if (EXTERNAL_MMX(cpu_flags
)) {
82 c
->put_signed_pixels_clamped
= ff_put_signed_pixels_clamped_mmx
;
84 if (EXTERNAL_SSE2(cpu_flags
)) {
85 c
->put_signed_pixels_clamped
= ff_put_signed_pixels_clamped_sse2
;