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avutil/random_seed: Add the runtime in cycles of the main loop to the entropy pool 

This should theoretically improve the randomness slightly

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2540d884f3)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-09 15:18:53 +01:00
parent 21844b7efb
commit e79f2c899b
1 changed files with 6 additions and 1 deletions
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7
libavutil/random_seed.c
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@ -97,8 +97,13 @@ static uint32_t get_generic_seed(void)
last_t = t;
}
if(TEST)
if(TEST) {
buffer[0] = buffer[1] = 0;
} else {
#ifdef AV_READ_TIME
buffer[111] += AV_READ_TIME();
#endif
}
av_sha_init(sha, 160);
av_sha_update(sha, (const uint8_t *)buffer, sizeof(buffer));