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Pointer align should be generic enough to handle awkward byte size

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especially for true 24bit format.
This commit is contained in:
ariff 2006-03-22 00:34:17 +00:00
parent 48983531da
commit 58fb8ecbe6
1 changed files with 7 additions and 4 deletions
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11
sys/dev/sound/pcm/channel.c
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@ -38,7 +38,6 @@ SND_DECLARE_FILE("$FreeBSD$");
#define DMA_ALIGN_THRESHOLD 4
#define DMA_ALIGN_MASK (~(DMA_ALIGN_THRESHOLD - 1))
#endif
#define DMA_ALIGN_MASK(bps) (~((bps) - 1))
#define CANCHANGE(c) (!(c->flags & CHN_F_TRIGGERED))
@ -1247,6 +1246,7 @@ chn_trigger(struct pcm_channel *c, int go)
int
chn_getptr(struct pcm_channel *c)
{
#if 0
int hwptr;
int a = (1 << c->align) - 1;
@ -1256,11 +1256,14 @@ chn_getptr(struct pcm_channel *c)
#if 1
hwptr &= ~a ; /* Apply channel align mask */
#endif
#if 0
hwptr &= DMA_ALIGN_MASK; /* Apply DMA align mask */
#endif
hwptr &= DMA_ALIGN_MASK(sndbuf_getbps(c->bufhard));
return hwptr;
#endif
int hwptr;
CHN_LOCKASSERT(c);
hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
return (hwptr - (hwptr % sndbuf_getbps(c->bufhard)));
}
struct pcmchan_caps *