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improve recording behaviour

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This commit is contained in:
Cameron Grant 2001-10-24 12:33:21 +00:00
parent 0ef0318866
commit 8309fd9aef
1 changed files with 10 additions and 5 deletions
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15
sys/dev/sound/pcm/channel.c
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@ -334,8 +334,10 @@ chn_rdfeed(struct pcm_channel *c)
})
amt = sndbuf_getready(b);
if (sndbuf_getfree(bs) < amt)
if (sndbuf_getfree(bs) < amt) {
c->xruns++;
amt = sndbuf_getfree(bs);
}
ret = (amt > 0)? sndbuf_feed(b, bs, c, c->feeder, amt) : 0;
amt = sndbuf_getready(b);
@ -400,14 +402,14 @@ chn_read(struct pcm_channel *c, struct uio *buf)
ret = 0;
count = hz;
while (!ret && (buf->uio_resid > 0) && (count > 0)) {
sz = MIN(buf->uio_resid, sndbuf_getblksz(bs));
sz = MIN(buf->uio_resid, sndbuf_getready(bs));
if (sz <= sndbuf_getready(bs)) {
if (sz > 0) {
ret = sndbuf_uiomove(bs, buf, sz);
} else {
if (c->flags & CHN_F_NBIO)
if (c->flags & CHN_F_NBIO) {
ret = EWOULDBLOCK;
else {
} else {
timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
if (timeout < 1)
timeout = 1;
@ -415,7 +417,10 @@ chn_read(struct pcm_channel *c, struct uio *buf)
if (ret == EWOULDBLOCK) {
count -= timeout;
ret = 0;
} else {
count = hz;
}
}
}
}