libavcodec/motion-test.c

   1 /*
   2  * (c) 2001 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file libavcodec/motion-test.c
  23  * motion test.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <sys/time.h>
  30 #include <unistd.h>
  31
  32 #include "dsputil.h"
  33
  34 #undef exit
  35 #undef printf
  36 #undef random
  37
  38 #define WIDTH 64
  39 #define HEIGHT 64
  40
  41 uint8_t img1[WIDTH * HEIGHT];
  42 uint8_t img2[WIDTH * HEIGHT];
  43
  44 void fill_random(uint8_t *tab, int size)
  45 {
  46     int i;
  47     for(i=0;i<size;i++) {
  48 #if 1
  49         tab[i] = random() % 256;
  50 #else
  51         tab[i] = i;
  52 #endif
  53     }
  54 }
  55
  56 void help(void)
  57 {
  58     printf("motion-test [-h]\n"
  59            "test motion implementations\n");
  60     exit(1);
  61 }
  62
  63 int64_t gettime(void)
  64 {
  65     struct timeval tv;
  66     gettimeofday(&tv,NULL);
  67     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
  68 }
  69
  70 #define NB_ITS 500
  71
  72 int dummy;
  73
  74 void test_motion(const char *name,
  75                  me_cmp_func test_func, me_cmp_func ref_func)
  76 {
  77     int x, y, d1, d2, it;
  78     uint8_t *ptr;
  79     int64_t ti;
  80     printf("testing '%s'\n", name);
  81
  82     /* test correctness */
  83     for(it=0;it<20;it++) {
  84
  85         fill_random(img1, WIDTH * HEIGHT);
  86         fill_random(img2, WIDTH * HEIGHT);
  87
  88         for(y=0;y<HEIGHT-17;y++) {
  89             for(x=0;x<WIDTH-17;x++) {
  90                 ptr = img2 + y * WIDTH + x;
  91                 d1 = test_func(NULL, img1, ptr, WIDTH, 1);
  92                 d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
  93                 if (d1 != d2) {
  94                     printf("error: mmx=%d c=%d\n", d1, d2);
  95                 }
  96             }
  97         }
  98     }
  99     emms_c();
 100
 101     /* speed test */
 102     ti = gettime();
 103     d1 = 0;
 104     for(it=0;it<NB_ITS;it++) {
 105         for(y=0;y<HEIGHT-17;y++) {
 106             for(x=0;x<WIDTH-17;x++) {
 107                 ptr = img2 + y * WIDTH + x;
 108                 d1 += test_func(NULL, img1, ptr, WIDTH, 1);
 109             }
 110         }
 111     }
 112     emms_c();
 113     dummy = d1; /* avoid optimization */
 114     ti = gettime() - ti;
 115
 116     printf("  %0.0f kop/s\n",
 117            (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
 118            (double)(ti / 1000.0));
 119 }
 120
 121
 122 int main(int argc, char **argv)
 123 {
 124     AVCodecContext *ctx;
 125     int c;
 126     DSPContext cctx, mmxctx;
 127     int flags[2] = { FF_MM_MMX, FF_MM_MMXEXT };
 128
 129     for(;;) {
 130         c = getopt(argc, argv, "h");
 131         if (c == -1)
 132             break;
 133         switch(c) {
 134         case 'h':
 135             help();
 136             break;
 137         }
 138     }
 139
 140     printf("ffmpeg motion test\n");
 141
 142     ctx = avcodec_alloc_context();
 143     ctx->dsp_mask = FF_MM_FORCE;
 144     dsputil_init(&cctx, ctx);
 145     for (c = 0; c < 2; c++) {
 146         int x;
 147         ctx->dsp_mask = FF_MM_FORCE | flags[c];
 148         dsputil_init(&mmxctx, ctx);
 149
 150         for (x = 0; x < 2; x++) {
 151             printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
 152                    x ? 8 : 16, x ? 8 : 16);
 153             test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
 154             test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
 155             test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
 156             test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
 157         }
 158     }
 159     av_free(ctx);
 160
 161     return 0;
 162 }