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sys/dev/sound/pcm/vchan.c
| Show First 20 Lines • Show All 922 Lines • ▼ Show 20 Lines | vchan_setnew(struct snddev_info *d, int direction, int newcnt) | ||||
| if (newcnt > vcnt) { | if (newcnt > vcnt) { | ||||
| /* add new vchans - find a parent channel first */ | /* add new vchans - find a parent channel first */ | ||||
| ch = NULL; | ch = NULL; | ||||
| CHN_FOREACH(c, d, channels.pcm) { | CHN_FOREACH(c, d, channels.pcm) { | ||||
| CHN_LOCK(c); | CHN_LOCK(c); | ||||
| if (c->direction == direction && | if (c->direction == direction && | ||||
| ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && | ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && | ||||
| c->refcount < 1 && | |||||
| !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { | !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { | ||||
| /* | /* | ||||
| * Reuse hw channel with vchans already | * Reuse hw channel with vchans already | ||||
| * created. | * created. | ||||
| */ | */ | ||||
| if (c->flags & CHN_F_HAS_VCHAN) { | if (c->flags & CHN_F_HAS_VCHAN) { | ||||
| ch = c; | ch = c; | ||||
| break; | break; | ||||
| ▲ Show 20 Lines • Show All 42 Lines • ▼ Show 20 Lines | CHN_FOREACH(c, d, channels.pcm) { | ||||
| if (c->direction != direction || | if (c->direction != direction || | ||||
| CHN_EMPTY(c, children) || | CHN_EMPTY(c, children) || | ||||
| !(c->flags & CHN_F_HAS_VCHAN)) { | !(c->flags & CHN_F_HAS_VCHAN)) { | ||||
| CHN_UNLOCK(c); | CHN_UNLOCK(c); | ||||
| continue; | continue; | ||||
| } | } | ||||
| CHN_FOREACH_SAFE(ch, c, nch, children) { | CHN_FOREACH_SAFE(ch, c, nch, children) { | ||||
| CHN_LOCK(ch); | CHN_LOCK(ch); | ||||
| if (vcnt == 1 && c->refcount > 0) { | if (vcnt == 1 && ch->flags & CHN_F_BUSY) { | ||||
| CHN_UNLOCK(ch); | CHN_UNLOCK(ch); | ||||
| break; | break; | ||||
| } | } | ||||
| if (!(ch->flags & CHN_F_BUSY) && | if (!(ch->flags & CHN_F_BUSY)) { | ||||
| ch->refcount < 1) { | |||||
| err = vchan_destroy(ch); | err = vchan_destroy(ch); | ||||
| if (err == 0) | if (err == 0) | ||||
| vcnt--; | vcnt--; | ||||
| } else | } else | ||||
| CHN_UNLOCK(ch); | CHN_UNLOCK(ch); | ||||
| if (vcnt == newcnt) | if (vcnt == newcnt) | ||||
| break; | break; | ||||
| } | } | ||||
| ▲ Show 20 Lines • Show All 118 Lines • Show Last 20 Lines | |||||