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 "config.h"
  33 #include "dsputil.h"
  34 #include "libavutil/lfg.h"
  35
  36 #undef exit
  37 #undef printf
  38
  39 #define WIDTH 64
  40 #define HEIGHT 64
  41
  42 uint8_t img1[WIDTH * HEIGHT];
  43 uint8_t img2[WIDTH * HEIGHT];
  44
  45 static void fill_random(uint8_t *tab, int size)
  46 {
  47     int i;
  48     AVLFG prng;
  49
  50     av_lfg_init(&prng, 1);
  51     for(i=0;i<size;i++) {
  52 #if 1
  53         tab[i] = av_lfg_get(&prng) % 256;
  54 #else
  55         tab[i] = i;
  56 #endif
  57     }
  58 }
  59
  60 static void help(void)
  61 {
  62     printf("motion-test [-h]\n"
  63            "test motion implementations\n");
  64     exit(1);
  65 }
  66
  67 static int64_t gettime(void)
  68 {
  69     struct timeval tv;
  70     gettimeofday(&tv,NULL);
  71     return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
  72 }
  73
  74 #define NB_ITS 500
  75
  76 int dummy;
  77
  78 static void test_motion(const char *name,
  79                  me_cmp_func test_func, me_cmp_func ref_func)
  80 {
  81     int x, y, d1, d2, it;
  82     uint8_t *ptr;
  83     int64_t ti;
  84     printf("testing '%s'\n", name);
  85
  86     /* test correctness */
  87     for(it=0;it<20;it++) {
  88
  89         fill_random(img1, WIDTH * HEIGHT);
  90         fill_random(img2, WIDTH * HEIGHT);
  91
  92         for(y=0;y<HEIGHT-17;y++) {
  93             for(x=0;x<WIDTH-17;x++) {
  94                 ptr = img2 + y * WIDTH + x;
  95                 d1 = test_func(NULL, img1, ptr, WIDTH, 1);
  96                 d2 = ref_func(NULL, img1, ptr, WIDTH, 1);
  97                 if (d1 != d2) {
  98                     printf("error: mmx=%d c=%d\n", d1, d2);
  99                 }
 100             }
 101         }
 102     }
 103     emms_c();
 104
 105     /* speed test */
 106     ti = gettime();
 107     d1 = 0;
 108     for(it=0;it<NB_ITS;it++) {
 109         for(y=0;y<HEIGHT-17;y++) {
 110             for(x=0;x<WIDTH-17;x++) {
 111                 ptr = img2 + y * WIDTH + x;
 112                 d1 += test_func(NULL, img1, ptr, WIDTH, 1);
 113             }
 114         }
 115     }
 116     emms_c();
 117     dummy = d1; /* avoid optimization */
 118     ti = gettime() - ti;
 119
 120     printf("  %0.0f kop/s\n",
 121            (double)NB_ITS * (WIDTH - 16) * (HEIGHT - 16) /
 122            (double)(ti / 1000.0));
 123 }
 124
 125
 126 int main(int argc, char **argv)
 127 {
 128     AVCodecContext *ctx;
 129     int c;
 130     DSPContext cctx, mmxctx;
 131     int flags[2] = { FF_MM_MMX, FF_MM_MMX2 };
 132     int flags_size = HAVE_MMX2 ? 2 : 1;
 133
 134     for(;;) {
 135         c = getopt(argc, argv, "h");
 136         if (c == -1)
 137             break;
 138         switch(c) {
 139         case 'h':
 140             help();
 141             break;
 142         }
 143     }
 144
 145     printf("ffmpeg motion test\n");
 146
 147     ctx = avcodec_alloc_context();
 148     ctx->dsp_mask = FF_MM_FORCE;
 149     dsputil_init(&cctx, ctx);
 150     for (c = 0; c < flags_size; c++) {
 151         int x;
 152         ctx->dsp_mask = FF_MM_FORCE | flags[c];
 153         dsputil_init(&mmxctx, ctx);
 154
 155         for (x = 0; x < 2; x++) {
 156             printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
 157                    x ? 8 : 16, x ? 8 : 16);
 158             test_motion("mmx",     mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
 159             test_motion("mmx_x2",  mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
 160             test_motion("mmx_y2",  mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
 161             test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
 162         }
 163     }
 164     av_free(ctx);
 165
 166     return 0;
 167 }