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print warnings if a pcm*.buffersize hint is out of range or a non-power-of-2

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This commit is contained in:
Cameron Grant 2002-01-23 05:49:41 +00:00
parent 23bc171b29
commit 4e60be3473
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=89690
1 changed files with 17 additions and 3 deletions
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20
sys/dev/sound/pcm/sound.c
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@ -567,13 +567,27 @@ unsigned int
pcm_getbuffersize(device_t dev, unsigned int min, unsigned int deflt, unsigned int max)
{
struct snddev_info *d = device_get_softc(dev);
int sz;
int sz, x;
sz = 0;
if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0)
if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) {
x = sz;
RANGE(sz, min, max);
else
if (x != sz)
device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, min, max, sz);
x = min;
while (x < sz)
x <<= 1;
if (x > sz)
x >>= 1;
if (x != sz) {
device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x);
sz = x;
}
} else {
sz = deflt;
}
d->bufsz = sz;
return sz;