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

fix blocksizing for playback, implement blocksizing for record

Browse Source
This commit is contained in:
cg 2001-01-24 01:22:53 +00:00
parent 7d3f51788a
commit 3f9a54eb71
1 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sys/dev/sound/pci/ds1.c
View File

@ -40,6 +40,7 @@
#define DS1_CHANS 4
#define DS1_RECPRIMARY 0
#define DS1_IRQHZ ((48000 << 8) / 256)
#define DS1_BUFFSIZE 4096
struct pbank {
volatile u_int32_t Format;
@ -487,7 +488,7 @@ ds1pchan_init(kobj_t obj, void *devinfo, snd_dbuf *b, pcm_channel *c, int dir)
ch->fmt = AFMT_U8;
ch->spd = 8000;
ch->run = 0;
if (sndbuf_alloc(ch->buffer, sc->parent_dmat, 4096) == -1)
if (sndbuf_alloc(ch->buffer, sc->parent_dmat, DS1_BUFFSIZE) == -1)
return NULL;
else {
ch->lsnum = sc->pslotfree;
@ -528,6 +529,8 @@ ds1pchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
/* irq rate is fixed at 187.5hz */
drate = ch->spd * sndbuf_getbps(ch->buffer);
blocksize = (drate << 8) / DS1_IRQHZ;
sndbuf_resize(ch->buffer, DS1_BUFFSIZE / blocksize, blocksize);
return blocksize;
}
@ -645,6 +648,14 @@ ds1rchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
static int
ds1rchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
{
struct sc_rchinfo *ch = data;
int drate;
/* irq rate is fixed at 187.5hz */
drate = ch->spd * sndbuf_getbps(ch->buffer);
blocksize = (drate << 8) / DS1_IRQHZ;
sndbuf_resize(ch->buffer, DS1_BUFFSIZE / blocksize, blocksize);
return blocksize;
}