d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

improve recording

Browse Source
This commit is contained in:
cg 2000-06-06 22:30:22 +00:00
parent abb00fd380
commit d22fc7d403
1 changed files with 27 additions and 17 deletions

44
sys/dev/sound/pcm/channel.c

@ -233,7 +233,7 @@ chn_checkunderflow(pcm_channel *c)
b->fl = b->bufsize - b->rl;
b->underflow = 0;
} else {
chn_dmaupdate(c);
/* chn_dmaupdate(c); */
}
}
@ -540,6 +540,7 @@ chn_rddump(pcm_channel *c, int cnt)
{
snd_dbuf *b = &c->buffer;
printf("overrun, dumping %d bytes\n", cnt);
b->rl -= cnt;
b->fl += cnt;
b->rp = (b->rp + cnt) % b->bufsize;
@ -557,6 +558,10 @@ chn_rdfeed(pcm_channel *c)
snd_dbuf *bs = &c->buffer2nd;
int l, lacc;
/*
printf("b: [rl: %d, rp %d, fl %d, fp %d]; bs: [rl: %d, rp %d, fl %d, fp %d]\n",
b->rl, b->rp, b->fl, b->fp, bs->rl, bs->rp, bs->fl, bs->fp);
*/
/* ensure we always have a whole number of samples */
lacc = 0;
while (bs->fl >= DMA_ALIGN_THRESHOLD && b->rl >= DMA_ALIGN_THRESHOLD) {
@ -587,12 +592,11 @@ chn_rdfeed2nd(pcm_channel *c, struct uio *buf)
snd_dbuf *bs = &c->buffer2nd;
int l, w, wacc;
/* The DMA buffer may have pcm data. */
while(chn_rdfeed(c) > 0);
/* ensure we always have a whole number of samples */
wacc = 0;
while (buf->uio_resid > 0 && bs->rl > 0) {
while ((buf->uio_resid > 0) && (bs->rl > 0)) {
/* The DMA buffer may have pcm data. */
/* while (chn_rdfeed(c) > 0); */
/*
* The size of the data to move here does not have to be
* aligned. We take care of it upon moving the data to a
@ -601,7 +605,8 @@ chn_rdfeed2nd(pcm_channel *c, struct uio *buf)
l = min(bs->rl, bs->bufsize - bs->rp);
/* Move the samples, update the markers and pointers. */
w = c->feeder->feed(c->feeder, c, bs->buf + bs->rp, l, buf);
if (w == 0) panic("no feed");
if (w == 0)
panic("no feed");
bs->fl += w;
bs->rl -= w;
bs->rp = (bs->rp + w) % bs->bufsize;
@ -610,10 +615,6 @@ chn_rdfeed2nd(pcm_channel *c, struct uio *buf)
/* Accumulate the total bytes of the moved samples. */
bs->total += w;
wacc += w;
/* If any pcm data gets moved, suck up the DMA buffer. */
if (w > 0)
while (chn_rdfeed(c) > 0);
}
return wacc;
@ -709,14 +710,17 @@ chn_read(pcm_channel *c, struct uio *buf)
c->flags |= CHN_F_READING;
c->flags &= ~CHN_F_ABORTING;
limit = buf->uio_resid - b->blksz;
/* suck up the DMA and secondary buffers. */
while (chn_rdfeed2nd(c, buf) > 0);
if (buf->uio_resid == 0)
goto skip;
limit = res - b->blksz;
if (limit < 0)
limit = 0;
/* Update the pointers and suck up the DMA and secondary buffers. */
chn_dmaupdate(c);
while (chn_rdfeed2nd(c, buf) > 0);
/* Start capturing if not yet. */
if ((!bs->rl || !b->rl) && !b->dl)
chn_start(c);
@ -726,6 +730,7 @@ chn_read(pcm_channel *c, struct uio *buf)
while (buf->uio_resid > 0) {
/* Suck up the DMA and secondary buffers. */
chn_dmaupdate(c);
while (chn_rdfeed(c) > 0);
while (chn_rdfeed2nd(c, buf) > 0);
/* Have we finished to feed the uio? */
@ -735,7 +740,7 @@ chn_read(pcm_channel *c, struct uio *buf)
/* Wait for new pcm samples. */
/* splx(s); */
timeout = (buf->uio_resid - limit >= b->dl)? hz / 20 : 1;
ret = tsleep(b, PRIBIO | PCATCH, "pcmrd", timeout);
ret = tsleep(b, PRIBIO | PCATCH, "pcmrd", 1);
/* s = spltty(); */
/* if (ret == EINTR) chn_abort(c); */
if (ret == EINTR || ret == ERESTART)
@ -746,6 +751,8 @@ chn_read(pcm_channel *c, struct uio *buf)
if (buf->uio_resid == res)
ret = EAGAIN;
}
skip:
c->flags &= ~CHN_F_READING;
splx(s);
return ret;
@ -1186,6 +1193,10 @@ chn_setblocksize(pcm_channel *c, int blkcnt, int blksz)
/* default to blksz = ~0.25s */
if (blksz < 16)
blksz = (ss * c->speed) >> 2;
if (blksz > CHN_2NDBUFMAXSIZE / 2)
blksz = CHN_2NDBUFMAXSIZE / 2;
if (blkcnt < 2)
blkcnt = 2;
if (blkcnt * blksz > CHN_2NDBUFMAXSIZE)
blkcnt = CHN_2NDBUFMAXSIZE / blksz;
@ -1206,7 +1217,6 @@ chn_setblocksize(pcm_channel *c, int blkcnt, int blksz)
buf_clear(bs, bs->fmt, bs->bufsize);
bs->blkcnt = blkcnt;
bs->blksz = blksz;
RANGE(blksz, 16, b->bufsize / 2);
b->blksz = c->setblocksize(c->devinfo, blksz);
splx(s);