libavcodec/x86/videodsp_init.c

   1 /*
   2  * Copyright (C) 2012 Ronald S. Bultje
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * Libav is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with Libav; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "config.h"
  22 #include "libavutil/attributes.h"
  23 #include "libavutil/common.h"
  24 #include "libavutil/cpu.h"
  25 #include "libavutil/mem.h"
  26 #include "libavutil/x86/asm.h"
  27 #include "libavutil/x86/cpu.h"
  28 #include "libavcodec/videodsp.h"
  29
  30 #if HAVE_X86ASM
  31 typedef void emu_edge_vfix_func(uint8_t *dst, const uint8_t *src,
  32                                 x86_reg dst_stride, x86_reg src_stride,
  33                                 x86_reg start_y, x86_reg end_y, x86_reg bh);
  34 typedef void emu_edge_vvar_func(uint8_t *dst, const uint8_t *src,
  35                                 x86_reg dst_stride, x86_reg src_stride,
  36                                 x86_reg start_y, x86_reg end_y, x86_reg bh,
  37                                 x86_reg w);
  38
  39 extern emu_edge_vfix_func ff_emu_edge_vfix1_mmx;
  40 extern emu_edge_vfix_func ff_emu_edge_vfix2_mmx;
  41 extern emu_edge_vfix_func ff_emu_edge_vfix3_mmx;
  42 extern emu_edge_vfix_func ff_emu_edge_vfix4_mmx;
  43 extern emu_edge_vfix_func ff_emu_edge_vfix5_mmx;
  44 extern emu_edge_vfix_func ff_emu_edge_vfix6_mmx;
  45 extern emu_edge_vfix_func ff_emu_edge_vfix7_mmx;
  46 extern emu_edge_vfix_func ff_emu_edge_vfix8_mmx;
  47 extern emu_edge_vfix_func ff_emu_edge_vfix9_mmx;
  48 extern emu_edge_vfix_func ff_emu_edge_vfix10_mmx;
  49 extern emu_edge_vfix_func ff_emu_edge_vfix11_mmx;
  50 extern emu_edge_vfix_func ff_emu_edge_vfix12_mmx;
  51 extern emu_edge_vfix_func ff_emu_edge_vfix13_mmx;
  52 extern emu_edge_vfix_func ff_emu_edge_vfix14_mmx;
  53 extern emu_edge_vfix_func ff_emu_edge_vfix15_mmx;
  54 extern emu_edge_vfix_func ff_emu_edge_vfix16_mmx;
  55 extern emu_edge_vfix_func ff_emu_edge_vfix17_mmx;
  56 extern emu_edge_vfix_func ff_emu_edge_vfix18_mmx;
  57 extern emu_edge_vfix_func ff_emu_edge_vfix19_mmx;
  58 extern emu_edge_vfix_func ff_emu_edge_vfix20_mmx;
  59 extern emu_edge_vfix_func ff_emu_edge_vfix21_mmx;
  60 extern emu_edge_vfix_func ff_emu_edge_vfix22_mmx;
  61 #if ARCH_X86_32
  62 static emu_edge_vfix_func * const vfixtbl_mmx[22] = {
  63     &ff_emu_edge_vfix1_mmx,  &ff_emu_edge_vfix2_mmx,  &ff_emu_edge_vfix3_mmx,
  64     &ff_emu_edge_vfix4_mmx,  &ff_emu_edge_vfix5_mmx,  &ff_emu_edge_vfix6_mmx,
  65     &ff_emu_edge_vfix7_mmx,  &ff_emu_edge_vfix8_mmx,  &ff_emu_edge_vfix9_mmx,
  66     &ff_emu_edge_vfix10_mmx, &ff_emu_edge_vfix11_mmx, &ff_emu_edge_vfix12_mmx,
  67     &ff_emu_edge_vfix13_mmx, &ff_emu_edge_vfix14_mmx, &ff_emu_edge_vfix15_mmx,
  68     &ff_emu_edge_vfix16_mmx, &ff_emu_edge_vfix17_mmx, &ff_emu_edge_vfix18_mmx,
  69     &ff_emu_edge_vfix19_mmx, &ff_emu_edge_vfix20_mmx, &ff_emu_edge_vfix21_mmx,
  70     &ff_emu_edge_vfix22_mmx
  71 };
  72 #endif
  73 extern emu_edge_vvar_func ff_emu_edge_vvar_mmx;
  74 extern emu_edge_vfix_func ff_emu_edge_vfix16_sse;
  75 extern emu_edge_vfix_func ff_emu_edge_vfix17_sse;
  76 extern emu_edge_vfix_func ff_emu_edge_vfix18_sse;
  77 extern emu_edge_vfix_func ff_emu_edge_vfix19_sse;
  78 extern emu_edge_vfix_func ff_emu_edge_vfix20_sse;
  79 extern emu_edge_vfix_func ff_emu_edge_vfix21_sse;
  80 extern emu_edge_vfix_func ff_emu_edge_vfix22_sse;
  81 static emu_edge_vfix_func * const vfixtbl_sse[22] = {
  82     ff_emu_edge_vfix1_mmx,  ff_emu_edge_vfix2_mmx,  ff_emu_edge_vfix3_mmx,
  83     ff_emu_edge_vfix4_mmx,  ff_emu_edge_vfix5_mmx,  ff_emu_edge_vfix6_mmx,
  84     ff_emu_edge_vfix7_mmx,  ff_emu_edge_vfix8_mmx,  ff_emu_edge_vfix9_mmx,
  85     ff_emu_edge_vfix10_mmx, ff_emu_edge_vfix11_mmx, ff_emu_edge_vfix12_mmx,
  86     ff_emu_edge_vfix13_mmx, ff_emu_edge_vfix14_mmx, ff_emu_edge_vfix15_mmx,
  87     ff_emu_edge_vfix16_sse, ff_emu_edge_vfix17_sse, ff_emu_edge_vfix18_sse,
  88     ff_emu_edge_vfix19_sse, ff_emu_edge_vfix20_sse, ff_emu_edge_vfix21_sse,
  89     ff_emu_edge_vfix22_sse
  90 };
  91 extern emu_edge_vvar_func ff_emu_edge_vvar_sse;
  92
  93 typedef void emu_edge_hfix_func(uint8_t *dst, x86_reg dst_stride,
  94                                 x86_reg start_x, x86_reg bh);
  95 typedef void emu_edge_hvar_func(uint8_t *dst, x86_reg dst_stride,
  96                                 x86_reg start_x, x86_reg n_words, x86_reg bh);
  97
  98 extern emu_edge_hfix_func ff_emu_edge_hfix2_mmx;
  99 extern emu_edge_hfix_func ff_emu_edge_hfix4_mmx;
 100 extern emu_edge_hfix_func ff_emu_edge_hfix6_mmx;
 101 extern emu_edge_hfix_func ff_emu_edge_hfix8_mmx;
 102 extern emu_edge_hfix_func ff_emu_edge_hfix10_mmx;
 103 extern emu_edge_hfix_func ff_emu_edge_hfix12_mmx;
 104 extern emu_edge_hfix_func ff_emu_edge_hfix14_mmx;
 105 extern emu_edge_hfix_func ff_emu_edge_hfix16_mmx;
 106 extern emu_edge_hfix_func ff_emu_edge_hfix18_mmx;
 107 extern emu_edge_hfix_func ff_emu_edge_hfix20_mmx;
 108 extern emu_edge_hfix_func ff_emu_edge_hfix22_mmx;
 109 #if ARCH_X86_32
 110 static emu_edge_hfix_func * const hfixtbl_mmx[11] = {
 111     ff_emu_edge_hfix2_mmx,  ff_emu_edge_hfix4_mmx,  ff_emu_edge_hfix6_mmx,
 112     ff_emu_edge_hfix8_mmx,  ff_emu_edge_hfix10_mmx, ff_emu_edge_hfix12_mmx,
 113     ff_emu_edge_hfix14_mmx, ff_emu_edge_hfix16_mmx, ff_emu_edge_hfix18_mmx,
 114     ff_emu_edge_hfix20_mmx, ff_emu_edge_hfix22_mmx
 115 };
 116 #endif
 117 extern emu_edge_hvar_func ff_emu_edge_hvar_mmx;
 118 extern emu_edge_hfix_func ff_emu_edge_hfix16_sse2;
 119 extern emu_edge_hfix_func ff_emu_edge_hfix18_sse2;
 120 extern emu_edge_hfix_func ff_emu_edge_hfix20_sse2;
 121 extern emu_edge_hfix_func ff_emu_edge_hfix22_sse2;
 122 static emu_edge_hfix_func * const hfixtbl_sse2[11] = {
 123     ff_emu_edge_hfix2_mmx,  ff_emu_edge_hfix4_mmx,  ff_emu_edge_hfix6_mmx,
 124     ff_emu_edge_hfix8_mmx,  ff_emu_edge_hfix10_mmx, ff_emu_edge_hfix12_mmx,
 125     ff_emu_edge_hfix14_mmx, ff_emu_edge_hfix16_sse2, ff_emu_edge_hfix18_sse2,
 126     ff_emu_edge_hfix20_sse2, ff_emu_edge_hfix22_sse2
 127 };
 128 extern emu_edge_hvar_func ff_emu_edge_hvar_sse2;
 129
 130 static av_always_inline void emulated_edge_mc(uint8_t *dst, const uint8_t *src,
 131                                               ptrdiff_t dst_stride,
 132                                               ptrdiff_t src_stride,
 133                                               x86_reg block_w, x86_reg block_h,
 134                                               x86_reg src_x, x86_reg src_y,
 135                                               x86_reg w, x86_reg h,
 136                                               emu_edge_vfix_func * const *vfix_tbl,
 137                                               emu_edge_vvar_func *v_extend_var,
 138                                               emu_edge_hfix_func * const *hfix_tbl,
 139                                               emu_edge_hvar_func *h_extend_var)
 140 {
 141     x86_reg start_y, start_x, end_y, end_x, src_y_add = 0, p;
 142
 143     if (!w || !h)
 144          return;
 145
 146     if (src_y >= h) {
 147         src  -= src_y * src_stride;
 148         src_y = src_y_add = h - 1;
 149     } else if (src_y <= -block_h) {
 150         src  -= src_y*src_stride;
 151         src_y = src_y_add = 1 - block_h;
 152     }
 153     if (src_x >= w) {
 154         src   += w - 1 - src_x;
 155         src_x  = w - 1;
 156     } else if (src_x <= -block_w) {
 157         src   += 1 - block_w - src_x;
 158         src_x  = 1 - block_w;
 159     }
 160
 161     start_y = FFMAX(0, -src_y);
 162     start_x = FFMAX(0, -src_x);
 163     end_y   = FFMIN(block_h, h-src_y);
 164     end_x   = FFMIN(block_w, w-src_x);
 165     assert(start_x < end_x && block_w > 0);
 166     assert(start_y < end_y && block_h > 0);
 167
 168     // fill in the to-be-copied part plus all above/below
 169     src += (src_y_add + start_y) * src_stride + start_x;
 170     w = end_x - start_x;
 171     if (w <= 22) {
 172         vfix_tbl[w - 1](dst + start_x, src,
 173                         dst_stride, src_stride,
 174                         start_y, end_y, block_h);
 175     } else {
 176         v_extend_var(dst + start_x, src, dst_stride, src_stride,
 177                      start_y, end_y, block_h, w);
 178     }
 179
 180     // fill left
 181     if (start_x) {
 182         if (start_x <= 22) {
 183             hfix_tbl[(start_x - 1) >> 1](dst, dst_stride, start_x, block_h);
 184         } else {
 185             h_extend_var(dst, dst_stride,
 186                          start_x, (start_x + 1) >> 1, block_h);
 187         }
 188     }
 189
 190     // fill right
 191     p = block_w - end_x;
 192     if (p) {
 193         if (p <= 22) {
 194             hfix_tbl[(p - 1) >> 1](dst + end_x - (p & 1), dst_stride,
 195                                    -!(p & 1), block_h);
 196         } else {
 197             h_extend_var(dst + end_x - (p & 1), dst_stride,
 198                          -!(p & 1), (p + 1) >> 1, block_h);
 199         }
 200     }
 201 }
 202
 203 #if ARCH_X86_32
 204 static av_noinline void emulated_edge_mc_mmx(uint8_t *buf, const uint8_t *src,
 205                                              ptrdiff_t buf_stride,
 206                                              ptrdiff_t src_stride,
 207                                              int block_w, int block_h,
 208                                              int src_x, int src_y, int w, int h)
 209 {
 210     emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
 211                      src_x, src_y, w, h, vfixtbl_mmx, &ff_emu_edge_vvar_mmx,
 212                      hfixtbl_mmx, &ff_emu_edge_hvar_mmx);
 213 }
 214
 215 static av_noinline void emulated_edge_mc_sse(uint8_t * buf,const uint8_t *src,
 216                                              ptrdiff_t buf_stride,
 217                                              ptrdiff_t src_stride,
 218                                              int block_w, int block_h,
 219                                              int src_x, int src_y, int w, int h)
 220 {
 221     emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h,
 222                      src_x, src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
 223                      hfixtbl_mmx, &ff_emu_edge_hvar_mmx);
 224 }
 225 #endif
 226
 227 static av_noinline void emulated_edge_mc_sse2(uint8_t *buf, const uint8_t *src,
 228                                               ptrdiff_t buf_stride,
 229                                               ptrdiff_t src_stride,
 230                                               int block_w, int block_h,
 231                                               int src_x, int src_y, int w,
 232                                               int h)
 233 {
 234     emulated_edge_mc(buf, src, buf_stride, src_stride, block_w, block_h, src_x,
 235                      src_y, w, h, vfixtbl_sse, &ff_emu_edge_vvar_sse,
 236                      hfixtbl_sse2, &ff_emu_edge_hvar_sse2);
 237 }
 238 #endif /* HAVE_X86ASM */
 239
 240 void ff_prefetch_mmxext(uint8_t *buf, ptrdiff_t stride, int h);
 241 void ff_prefetch_3dnow(uint8_t *buf, ptrdiff_t stride, int h);
 242
 243 av_cold void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc)
 244 {
 245 #if HAVE_X86ASM
 246     int cpu_flags = av_get_cpu_flags();
 247
 248 #if ARCH_X86_32
 249     if (EXTERNAL_MMX(cpu_flags) && bpc <= 8) {
 250         ctx->emulated_edge_mc = emulated_edge_mc_mmx;
 251     }
 252     if (EXTERNAL_AMD3DNOW(cpu_flags)) {
 253         ctx->prefetch = ff_prefetch_3dnow;
 254     }
 255 #endif /* ARCH_X86_32 */
 256     if (EXTERNAL_MMXEXT(cpu_flags)) {
 257         ctx->prefetch = ff_prefetch_mmxext;
 258     }
 259 #if ARCH_X86_32
 260     if (EXTERNAL_SSE(cpu_flags) && bpc <= 8) {
 261         ctx->emulated_edge_mc = emulated_edge_mc_sse;
 262     }
 263 #endif /* ARCH_X86_32 */
 264     if (EXTERNAL_SSE2(cpu_flags) && bpc <= 8) {
 265         ctx->emulated_edge_mc = emulated_edge_mc_sse2;
 266     }
 267 #endif /* HAVE_X86ASM */
 268 }