Revision 48d58e59

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libavutil/Makefile
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       md5.o                                                            \
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       mem.o                                                            \
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       random.o                                                         \
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       random_seed.o                                                    \
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       rational.o                                                       \
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       rc4.o                                                            \
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       sha1.o                                                           \
libavutil/random_seed.c
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/*
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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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        read(fd, &seed, 4);
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        close(fd);
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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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}
libavutil/random_seed.h
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/*
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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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#ifndef AVUTIL_RANDOM_SEED_H
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#define AVUTIL_RANDOM_SEED_H
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#include <stdint.h>
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/**
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 * Get a seed to use in conjuction with random functions
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 */
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uint32_t ff_random_get_seed();
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#endif /* AVUTIL_RANDOM_SEED_H */

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