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idctdsp_init.c
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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 */
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 
44  int idct_permutation_type)
45 {
46  int i;
47 
48  switch (idct_permutation_type) {
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 
63  unsigned high_bit_depth)
64 {
66 
67  if (INLINE_MMX(cpu_flags)) {
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:
80  break;
81  case FF_IDCT_XVIDMMX:
85  break;
86  }
87  }
88  }
89  if (EXTERNAL_MMX(cpu_flags)) {
91  }
92 
93  if (INLINE_MMXEXT(cpu_flags)) {
94  if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
98  }
99  }
100 
101  if (INLINE_SSE2(cpu_flags)) {
102  if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
105  c->idct = ff_idct_xvid_sse2;
107  }
108  }
109  if (EXTERNAL_SSE2(cpu_flags)) {
111  }
112 }