mirror of
https://github.com/FFmpeg/FFmpeg.git
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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/*
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* Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include "timer.h"
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#include "random_seed.h"
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uint32_t ff_random_get_seed(void)
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{
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uint32_t seed;
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int fd;
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if ((fd = open("/dev/random", O_RDONLY)) == -1)
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fd = open("/dev/urandom", O_RDONLY);
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if (fd != -1){
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int err = read(fd, &seed, 4);
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close(fd);
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if (err == 4)
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return seed;
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}
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#ifdef AV_READ_TIME
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seed = AV_READ_TIME();
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#endif
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// XXX what to do ?
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return seed;
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}
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