git.sesse.net Git - ffmpeg/blob - libavcodec/x86/idctdsp_init.c

   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
  42 av_cold int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,
  43                                               enum idct_permutation_type perm_type)
  44 {
  45     int i;
  46
  47     switch (perm_type) {
  48     case FF_IDCT_PERM_SIMPLE:
  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
  61 av_cold void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
  62                                  unsigned high_bit_depth)
  63 {
  64     int cpu_flags = av_get_cpu_flags();
  65
  66     if (EXTERNAL_MMX(cpu_flags)) {
  67         c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
  68         c->put_pixels_clamped        = ff_put_pixels_clamped_mmx;
  69         c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
  70
  71         if (!high_bit_depth &&
  72             avctx->lowres == 0 &&
  73             (avctx->idct_algo == FF_IDCT_AUTO ||
  74                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
  75                 avctx->idct_algo == 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->perm_type = FF_IDCT_PERM_SIMPLE;
  80         }
  81     }
  82
  83     if (EXTERNAL_SSE2(cpu_flags)) {
  84         c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_sse2;
  85         c->put_pixels_clamped        = ff_put_pixels_clamped_sse2;
  86         c->add_pixels_clamped        = ff_add_pixels_clamped_sse2;
  87
  88         if (!high_bit_depth &&
  89             avctx->lowres == 0 &&
  90             (avctx->idct_algo == FF_IDCT_AUTO ||
  91                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
  92                 avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
  93                 c->idct_put  = ff_simple_idct_put_sse2;
  94                 c->idct_add  = ff_simple_idct_add_sse2;
  95                 c->perm_type = FF_IDCT_PERM_SIMPLE;
  96         }
  97
  98         if (ARCH_X86_64 &&
  99             !high_bit_depth &&
 100             avctx->lowres == 0 &&
 101             (avctx->idct_algo == FF_IDCT_AUTO ||
 102                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
 103                 avctx->idct_algo == FF_IDCT_SIMPLEMMX ||
 104                 avctx->idct_algo == FF_IDCT_SIMPLE)) {
 105                 c->idct      = ff_simple_idct8_sse2;
 106                 c->idct_put  = ff_simple_idct8_put_sse2;
 107                 c->idct_add  = ff_simple_idct8_add_sse2;
 108                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 109         }
 110     }
 111
 112     if (ARCH_X86_64 && avctx->lowres == 0) {
 113         if (EXTERNAL_AVX(cpu_flags) &&
 114             !high_bit_depth &&
 115             (avctx->idct_algo == FF_IDCT_AUTO ||
 116                 avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
 117                 avctx->idct_algo == FF_IDCT_SIMPLEMMX ||
 118                 avctx->idct_algo == FF_IDCT_SIMPLE)) {
 119                 c->idct      = ff_simple_idct8_avx;
 120                 c->idct_put  = ff_simple_idct8_put_avx;
 121                 c->idct_add  = ff_simple_idct8_add_avx;
 122                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 123         }
 124
 125         if (avctx->bits_per_raw_sample == 10 &&
 126             avctx->codec_id != AV_CODEC_ID_MPEG4 &&
 127             (avctx->idct_algo == FF_IDCT_AUTO ||
 128              avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
 129              avctx->idct_algo == FF_IDCT_SIMPLE)) {
 130             if (EXTERNAL_SSE2(cpu_flags)) {
 131                 c->idct_put  = ff_simple_idct10_put_sse2;
 132                 c->idct_add  = NULL;
 133                 c->idct      = ff_simple_idct10_sse2;
 134                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 135
 136             }
 137             if (EXTERNAL_AVX(cpu_flags)) {
 138                 c->idct_put  = ff_simple_idct10_put_avx;
 139                 c->idct_add  = NULL;
 140                 c->idct      = ff_simple_idct10_avx;
 141                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 142             }
 143         }
 144
 145         if (avctx->bits_per_raw_sample == 12 &&
 146             (avctx->idct_algo == FF_IDCT_AUTO ||
 147              avctx->idct_algo == FF_IDCT_SIMPLEMMX)) {
 148             if (EXTERNAL_SSE2(cpu_flags)) {
 149                 c->idct_put  = ff_simple_idct12_put_sse2;
 150                 c->idct_add  = NULL;
 151                 c->idct      = ff_simple_idct12_sse2;
 152                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 153             }
 154             if (EXTERNAL_AVX(cpu_flags)) {
 155                 c->idct_put  = ff_simple_idct12_put_avx;
 156                 c->idct_add  = NULL;
 157                 c->idct      = ff_simple_idct12_avx;
 158                 c->perm_type = FF_IDCT_PERM_TRANSPOSE;
 159             }
 160         }
 161     }
 162 }