LCOV - code coverage report
Current view: top level - libavcodec/x86 - mpegvideodsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 55 9.1 %
Date: 2017-12-17 23:02:56 Functions: 1 2 50.0 %

          Line data    Source code
       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/mpegvideodsp.h"
      24             : #include "libavcodec/videodsp.h"
      25             : 
      26             : #if HAVE_INLINE_ASM
      27             : 
      28           0 : static void gmc_mmx(uint8_t *dst, uint8_t *src,
      29             :                     int stride, int h, int ox, int oy,
      30             :                     int dxx, int dxy, int dyx, int dyy,
      31             :                     int shift, int r, int width, int height)
      32             : {
      33           0 :     const int w    = 8;
      34           0 :     const int ix   = ox  >> (16 + shift);
      35           0 :     const int iy   = oy  >> (16 + shift);
      36           0 :     const int oxs  = ox  >> 4;
      37           0 :     const int oys  = oy  >> 4;
      38           0 :     const int dxxs = dxx >> 4;
      39           0 :     const int dxys = dxy >> 4;
      40           0 :     const int dyxs = dyx >> 4;
      41           0 :     const int dyys = dyy >> 4;
      42           0 :     const uint16_t r4[4]   = { r, r, r, r };
      43           0 :     const uint16_t dxy4[4] = { dxys, dxys, dxys, dxys };
      44           0 :     const uint16_t dyy4[4] = { dyys, dyys, dyys, dyys };
      45           0 :     const uint64_t shift2  = 2 * shift;
      46             : #define MAX_STRIDE 4096U
      47             : #define MAX_H 8U
      48             :     uint8_t edge_buf[(MAX_H + 1) * MAX_STRIDE];
      49             :     int x, y;
      50             : 
      51           0 :     const int dxw = (dxx - (1 << (16 + shift))) * (w - 1);
      52           0 :     const int dyh = (dyy - (1 << (16 + shift))) * (h - 1);
      53           0 :     const int dxh = dxy * (h - 1);
      54           0 :     const int dyw = dyx * (w - 1);
      55           0 :     int need_emu  =  (unsigned) ix >= width  - w || width < w ||
      56           0 :                      (unsigned) iy >= height - h || height< h
      57             :                      ;
      58             : 
      59           0 :     if ( // non-constant fullpel offset (3% of blocks)
      60           0 :         ((ox ^ (ox + dxw)) | (ox ^ (ox + dxh)) | (ox ^ (ox + dxw + dxh)) |
      61           0 :          (oy ^ (oy + dyw)) | (oy ^ (oy + dyh)) | (oy ^ (oy + dyw + dyh))) >> (16 + shift) ||
      62             :         // uses more than 16 bits of subpel mv (only at huge resolution)
      63           0 :         (dxx | dxy | dyx | dyy) & 15 ||
      64           0 :         (need_emu && (h > MAX_H || stride > MAX_STRIDE))) {
      65             :         // FIXME could still use mmx for some of the rows
      66           0 :         ff_gmc_c(dst, src, stride, h, ox, oy, dxx, dxy, dyx, dyy,
      67             :                  shift, r, width, height);
      68           0 :         return;
      69             :     }
      70             : 
      71           0 :     src += ix + iy * stride;
      72           0 :     if (need_emu) {
      73           0 :         ff_emulated_edge_mc_8(edge_buf, src, stride, stride, w + 1, h + 1, ix, iy, width, height);
      74           0 :         src = edge_buf;
      75             :     }
      76             : 
      77           0 :     __asm__ volatile (
      78             :         "movd         %0, %%mm6         \n\t"
      79             :         "pxor      %%mm7, %%mm7         \n\t"
      80             :         "punpcklwd %%mm6, %%mm6         \n\t"
      81             :         "punpcklwd %%mm6, %%mm6         \n\t"
      82           0 :         :: "r" (1 << shift));
      83             : 
      84           0 :     for (x = 0; x < w; x += 4) {
      85           0 :         uint16_t dx4[4] = { oxs - dxys + dxxs * (x + 0),
      86           0 :                             oxs - dxys + dxxs * (x + 1),
      87           0 :                             oxs - dxys + dxxs * (x + 2),
      88           0 :                             oxs - dxys + dxxs * (x + 3) };
      89           0 :         uint16_t dy4[4] = { oys - dyys + dyxs * (x + 0),
      90           0 :                             oys - dyys + dyxs * (x + 1),
      91           0 :                             oys - dyys + dyxs * (x + 2),
      92           0 :                             oys - dyys + dyxs * (x + 3) };
      93             : 
      94           0 :         for (y = 0; y < h; y++) {
      95           0 :             __asm__ volatile (
      96             :                 "movq      %0, %%mm4    \n\t"
      97             :                 "movq      %1, %%mm5    \n\t"
      98             :                 "paddw     %2, %%mm4    \n\t"
      99             :                 "paddw     %3, %%mm5    \n\t"
     100             :                 "movq   %%mm4, %0       \n\t"
     101             :                 "movq   %%mm5, %1       \n\t"
     102             :                 "psrlw    $12, %%mm4    \n\t"
     103             :                 "psrlw    $12, %%mm5    \n\t"
     104             :                 : "+m" (*dx4), "+m" (*dy4)
     105             :                 : "m" (*dxy4), "m" (*dyy4));
     106             : 
     107           0 :             __asm__ volatile (
     108             :                 "movq      %%mm6, %%mm2 \n\t"
     109             :                 "movq      %%mm6, %%mm1 \n\t"
     110             :                 "psubw     %%mm4, %%mm2 \n\t"
     111             :                 "psubw     %%mm5, %%mm1 \n\t"
     112             :                 "movq      %%mm2, %%mm0 \n\t"
     113             :                 "movq      %%mm4, %%mm3 \n\t"
     114             :                 "pmullw    %%mm1, %%mm0 \n\t" // (s - dx) * (s - dy)
     115             :                 "pmullw    %%mm5, %%mm3 \n\t" // dx * dy
     116             :                 "pmullw    %%mm5, %%mm2 \n\t" // (s - dx) * dy
     117             :                 "pmullw    %%mm4, %%mm1 \n\t" // dx * (s - dy)
     118             : 
     119             :                 "movd         %4, %%mm5 \n\t"
     120             :                 "movd         %3, %%mm4 \n\t"
     121             :                 "punpcklbw %%mm7, %%mm5 \n\t"
     122             :                 "punpcklbw %%mm7, %%mm4 \n\t"
     123             :                 "pmullw    %%mm5, %%mm3 \n\t" // src[1, 1] * dx * dy
     124             :                 "pmullw    %%mm4, %%mm2 \n\t" // src[0, 1] * (s - dx) * dy
     125             : 
     126             :                 "movd         %2, %%mm5 \n\t"
     127             :                 "movd         %1, %%mm4 \n\t"
     128             :                 "punpcklbw %%mm7, %%mm5 \n\t"
     129             :                 "punpcklbw %%mm7, %%mm4 \n\t"
     130             :                 "pmullw    %%mm5, %%mm1 \n\t" // src[1, 0] * dx * (s - dy)
     131             :                 "pmullw    %%mm4, %%mm0 \n\t" // src[0, 0] * (s - dx) * (s - dy)
     132             :                 "paddw        %5, %%mm1 \n\t"
     133             :                 "paddw     %%mm3, %%mm2 \n\t"
     134             :                 "paddw     %%mm1, %%mm0 \n\t"
     135             :                 "paddw     %%mm2, %%mm0 \n\t"
     136             : 
     137             :                 "psrlw        %6, %%mm0 \n\t"
     138             :                 "packuswb  %%mm0, %%mm0 \n\t"
     139             :                 "movd      %%mm0, %0    \n\t"
     140             : 
     141           0 :                 : "=m" (dst[x + y * stride])
     142           0 :                 : "m" (src[0]), "m" (src[1]),
     143           0 :                   "m" (src[stride]), "m" (src[stride + 1]),
     144             :                   "m" (*r4), "m" (shift2));
     145           0 :             src += stride;
     146             :         }
     147           0 :         src += 4 - h * stride;
     148             :     }
     149             : }
     150             : 
     151             : #endif /* HAVE_INLINE_ASM */
     152             : 
     153         737 : av_cold void ff_mpegvideodsp_init_x86(MpegVideoDSPContext *c)
     154             : {
     155             : #if HAVE_INLINE_ASM
     156         737 :     int cpu_flags = av_get_cpu_flags();
     157             : 
     158         737 :     if (INLINE_MMX(cpu_flags))
     159         119 :         c->gmc = gmc_mmx;
     160             : #endif /* HAVE_INLINE_ASM */
     161         737 : }

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