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

Pointer align should be generic enough to handle awkward byte size

Browse Source 
especially for true 24bit format.
This commit is contained in:
Ariff Abdullah 2006-03-22 00:34:17 +00:00
parent bacb51fb67
commit c17cb0c68f
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
sys/dev/sound/pcm/channel.c
View File

@ -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 *