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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 "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 
43  enum idct_permutation_type perm_type)
44 {
45  int i;
46 
47  switch (perm_type) {
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 
62  unsigned high_bit_depth)
63 {
64  int cpu_flags = av_get_cpu_flags();
65 
66  if (INLINE_MMX(cpu_flags)) {
69 
70  if (!high_bit_depth &&
71  avctx->lowres == 0 &&
72  (avctx->idct_algo == FF_IDCT_AUTO ||
73  avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
74  avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
79  }
80  }
81  if (EXTERNAL_MMX(cpu_flags)) {
83  }
84  if (EXTERNAL_SSE2(cpu_flags)) {
86  }
87 }