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

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav 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  * Libav 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 Libav; 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
  43 av_cold int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,
  44                                               enum idct_permutation_type perm_type)
  45 {
  46     int i;
  47
  48     switch (perm_type) {
  49     case FF_IDCT_PERM_SIMPLE:
  50         for (i = 0; i < 64; i++)
  51             idct_permutation[i] = simple_mmx_permutation[i];
  52         return 1;
  53     case FF_IDCT_PERM_SSE2:
  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
  62 av_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->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
  70         c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
  71
  72         if (!high_bit_depth) {
  73             switch (avctx->idct_algo) {
  74             case FF_IDCT_AUTO:
  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->perm_type             = FF_IDCT_PERM_SIMPLE;
  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
  90     if (INLINE_MMXEXT(cpu_flags)) {
  91         if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX) {
  92             c->idct_put = ff_idct_xvid_mmxext_put;
  93             c->idct_add = ff_idct_xvid_mmxext_add;
  94             c->idct     = ff_idct_xvid_mmxext;
  95         }
  96     }
  97
  98     if (INLINE_SSE2(cpu_flags)) {
  99         if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX) {
 100             c->idct_put              = ff_idct_xvid_sse2_put;
 101             c->idct_add              = ff_idct_xvid_sse2_add;
 102             c->idct                  = ff_idct_xvid_sse2;
 103             c->perm_type             = FF_IDCT_PERM_SSE2;
 104         }
 105     }
 106 }