libavutil/tests/random_seed.c

   1 /*
   2  * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
   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 #define TEST 1
  22 #include "libavutil/random_seed.c"
  23
  24 #define N 256
  25 #define F 2
  26 #include <stdio.h>
  27
  28 typedef uint32_t (*random_seed_ptr_t)(void);
  29
  30 int main(void)
  31 {
  32     int i, j, rsf, retry;
  33     uint32_t seeds[N];
  34     random_seed_ptr_t random_seed[F] = {av_get_random_seed, get_generic_seed};
  35
  36     for (rsf=0; rsf<F; ++rsf){
  37         for (retry=0; retry<3; retry++){
  38             for (i=0; i<N; i++){
  39                 seeds[i] = random_seed[rsf]();
  40                 for (j=0; j<i; j++)
  41                     if (seeds[j] == seeds[i])
  42                         goto retry;
  43             }
  44             printf("seeds OK\n");
  45             break;
  46             retry:;
  47         }
  48         if (retry >= 3) {
  49             printf("rsf %d: FAIL at %d with %"PRIX32"\n", rsf, j, seeds[j]);
  50             return 1;
  51         }
  52     }
  53     return 0;
  54 }