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

   1 /*
   2  * Copyright (c) 2000, 2001 Fabrice Bellard
   3  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23 #include "libavutil/attributes.h"
  24 #include "libavutil/cpu.h"
  25 #include "libavutil/x86/cpu.h"
  26 #include "libavcodec/avcodec.h"
  27 #include "libavcodec/dsputil.h"
  28 #include "libavcodec/simple_idct.h"
  29 #include "dsputil_x86.h"
  30 #include "idct_xvid.h"
  31
  32 /* Input permutation for the simple_idct_mmx */
  33 static const uint8_t simple_mmx_permutation[64] = {
  34     0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
  35     0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
  36     0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
  37     0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
  38     0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
  39     0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
  40     0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
  41     0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
  42 };
  43
  44 static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
  45
  46 av_cold int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,
  47                                               int idct_permutation_type)
  48 {
  49     int i;
  50
  51     switch (idct_permutation_type) {
  52     case FF_SIMPLE_IDCT_PERM:
  53         for (i = 0; i < 64; i++)
  54             idct_permutation[i] = simple_mmx_permutation[i];
  55         return 1;
  56     case FF_SSE2_IDCT_PERM:
  57         for (i = 0; i < 64; i++)
  58             idct_permutation[i] = (i & 0x38) | idct_sse2_row_perm[i & 7];
  59         return 1;
  60     }
  61
  62     return 0;
  63 }
  64
  65 static av_cold void dsputil_init_mmx(DSPContext *c, AVCodecContext *avctx,
  66                                      int cpu_flags, unsigned high_bit_depth)
  67 {
  68 #if HAVE_MMX_INLINE
  69     c->put_pixels_clamped        = ff_put_pixels_clamped_mmx;
  70     c->add_pixels_clamped        = ff_add_pixels_clamped_mmx;
  71
  72     if (!high_bit_depth) {
  73         c->draw_edges   = ff_draw_edges_mmx;
  74     }
  75
  76     if (avctx->lowres == 0 && !high_bit_depth) {
  77         switch (avctx->idct_algo) {
  78         case FF_IDCT_AUTO:
  79         case FF_IDCT_SIMPLEAUTO:
  80         case FF_IDCT_SIMPLEMMX:
  81             c->idct_put              = ff_simple_idct_put_mmx;
  82             c->idct_add              = ff_simple_idct_add_mmx;
  83             c->idct                  = ff_simple_idct_mmx;
  84             c->idct_permutation_type = FF_SIMPLE_IDCT_PERM;
  85             break;
  86         case FF_IDCT_XVIDMMX:
  87             c->idct_put              = ff_idct_xvid_mmx_put;
  88             c->idct_add              = ff_idct_xvid_mmx_add;
  89             c->idct                  = ff_idct_xvid_mmx;
  90             break;
  91         }
  92     }
  93
  94 #endif /* HAVE_MMX_INLINE */
  95
  96 #if HAVE_MMX_EXTERNAL
  97     c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_mmx;
  98 #endif /* HAVE_MMX_EXTERNAL */
  99 }
 100
 101 static av_cold void dsputil_init_mmxext(DSPContext *c, AVCodecContext *avctx,
 102                                         int cpu_flags, unsigned high_bit_depth)
 103 {
 104 #if HAVE_MMXEXT_INLINE
 105     if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
 106         c->idct_put = ff_idct_xvid_mmxext_put;
 107         c->idct_add = ff_idct_xvid_mmxext_add;
 108         c->idct     = ff_idct_xvid_mmxext;
 109     }
 110 #endif /* HAVE_MMXEXT_INLINE */
 111 }
 112
 113 static av_cold void dsputil_init_sse2(DSPContext *c, AVCodecContext *avctx,
 114                                       int cpu_flags, unsigned high_bit_depth)
 115 {
 116 #if HAVE_SSE2_INLINE
 117     if (!high_bit_depth && avctx->idct_algo == FF_IDCT_XVIDMMX && avctx->lowres == 0) {
 118         c->idct_put              = ff_idct_xvid_sse2_put;
 119         c->idct_add              = ff_idct_xvid_sse2_add;
 120         c->idct                  = ff_idct_xvid_sse2;
 121         c->idct_permutation_type = FF_SSE2_IDCT_PERM;
 122     }
 123 #endif /* HAVE_SSE2_INLINE */
 124
 125 #if HAVE_SSE2_EXTERNAL
 126     c->put_signed_pixels_clamped = ff_put_signed_pixels_clamped_sse2;
 127 #endif /* HAVE_SSE2_EXTERNAL */
 128 }
 129
 130 av_cold void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx,
 131                                  unsigned high_bit_depth)
 132 {
 133     int cpu_flags = av_get_cpu_flags();
 134
 135     if (X86_MMX(cpu_flags))
 136         dsputil_init_mmx(c, avctx, cpu_flags, high_bit_depth);
 137
 138     if (X86_MMXEXT(cpu_flags))
 139         dsputil_init_mmxext(c, avctx, cpu_flags, high_bit_depth);
 140
 141     if (X86_SSE2(cpu_flags))
 142         dsputil_init_sse2(c, avctx, cpu_flags, high_bit_depth);
 143
 144     if (CONFIG_ENCODERS)
 145         ff_dsputilenc_init_mmx(c, avctx, high_bit_depth);
 146 }