random_seed.h 1.3 KB

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  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. #ifndef AVUTIL_RANDOM_SEED_H
  21. #define AVUTIL_RANDOM_SEED_H
  22. #include <stdint.h>
  23. /**
  24. * Get a seed to use in conjunction with random functions.
  25. * This function tries to provide a good seed at a best effort bases.
  26. * Its possible to call this function multiple times if more bits are needed.
  27. * It can be quite slow, which is why it should only be used as seed for a faster
  28. * PRNG. The quality of the seed depends on the platform.
  29. */
  30. uint32_t av_get_random_seed(void);
  31. #endif /* AVUTIL_RANDOM_SEED_H */