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avformat/vividas: reduce keybits to require half the space

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-06-07 23:22:13 +02:00
parent 8c6c2747bc
commit 01d8c72b95
1 changed files with 6 additions and 6 deletions
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12
libavformat/vividas.c
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@ -78,11 +78,11 @@ static int viv_probe(const AVProbeData *p)
return AVPROBE_SCORE_MAX;
}
static const unsigned short keybits[32] = {
163, 416, 893, 82, 223, 572, 1137, 430,
659, 1104, 13, 626, 695, 972, 1465, 686,
843, 1216, 317, 1122, 1383, 92, 513, 1158,
1243, 48, 573, 1306, 1495, 396, 1009, 350,
static const uint8_t keybits[32] = {
20, 52, 111, 10, 27, 71, 142, 53,
82, 138, 1, 78, 86, 121, 183, 85,
105, 152, 39, 140, 172, 11, 64, 144,
155, 6, 71, 163, 186, 49, 126, 43,
};
static uint32_t decode_key(uint8_t *buf)
@ -91,7 +91,7 @@ static uint32_t decode_key(uint8_t *buf)
for (int i = 0; i < 32; i++) {
unsigned p = keybits[i];
key |= (unsigned)!!(buf[p>>3] & (1<<(p&7))) << i;
key |= ((buf[p] >> ((i*5+3)&7)) & 1u) << i;
}
return key;