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 "libavcodec/simple_idct.h"
26#include "idct_xvid.h"
27#include "idctdsp.h"
28
29/* Input permutation for the simple_idct_mmx */
30static 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
41static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
42
43av_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
62av_cold void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
63                                 unsigned high_bit_depth)
64{
65    int cpu_flags = av_get_cpu_flags();
66
67    if (INLINE_MMX(cpu_flags)) {
68        c->put_pixels_clamped        = ff_put_pixels_clamped_mmx;
69        c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
70
71        if (avctx->lowres == 0 && !high_bit_depth) {
72            switch (avctx->idct_algo) {
73            case FF_IDCT_AUTO:
74            case FF_IDCT_SIMPLEAUTO:
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    }
89    if (EXTERNAL_MMX(cpu_flags)) {
90        c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
91    }
92
93    if (INLINE_MMXEXT(cpu_flags)) {
94        if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
95            c->idct_put = ff_idct_xvid_mmxext_put;
96            c->idct_add = ff_idct_xvid_mmxext_add;
97            c->idct     = ff_idct_xvid_mmxext;
98        }
99    }
100
101    if (INLINE_SSE2(cpu_flags)) {
102        if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
103            c->idct_put              = ff_idct_xvid_sse2_put;
104            c->idct_add              = ff_idct_xvid_sse2_add;
105            c->idct                  = ff_idct_xvid_sse2;
106            c->idct_permutation_type = FF_SSE2_IDCT_PERM;
107        }
108    }
109    if (EXTERNAL_SSE2(cpu_flags)) {
110        c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_sse2;
111    }
112}
113