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fix a speed bug that nobody noticed

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cg 2000-05-15 02:10:27 +00:00
parent 8206be3a83
commit 85a224d838
1 changed files with 5 additions and 4 deletions
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9
sys/dev/sound/isa/ess.c
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@ -495,11 +495,12 @@ ess_calcspeed9(int *spd)
/* rate = source / (256 - divisor) */
/* divisor = 256 - (source / rate) */
speed = *spd;
t0 = 256 - (793800 / speed);
s0 = 793800 / (256 - t0);
t0 = 128 - (793800 / speed);
s0 = 793800 / (128 - t0);
t1 = 0x80 | (256 - (768000 / speed));
s1 = 768000 / (256 - t1);
t1 = 128 - (768000 / speed);
s1 = 768000 / (128 - t1);
t1 |= 0x80;
use0 = (ABS(speed - s0) < ABS(speed - s1))? 1 : 0;