From 420f58376d042d11f15ba9760f51ad286889c0c1 Mon Sep 17 00:00:00 2001
From: cg <cg@FreeBSD.org>
Date: Sun, 17 Jun 2001 23:23:06 +0000
Subject: revise dsp_clone() to return the first nonbusy channel instead of
 simply cycling channel numbers.

remove unused fields from struct snddev_info.
---
 sys/dev/sound/pcm/dsp.c     | 22 +++++++++++++---------
 sys/dev/sound/pcm/sndstat.c |  2 +-
 sys/dev/sound/pcm/sound.c   |  5 ++---
 sys/dev/sound/pcm/sound.h   |  3 +--
 4 files changed, 17 insertions(+), 15 deletions(-)

(limited to 'sys/dev/sound/pcm')

diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index 4653990..81d75da 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -992,9 +992,8 @@ dsp_unregister(int unit, int channel)
 static void
 dsp_clone(void *arg, char *name, int namelen, dev_t *dev)
 {
-	struct snddev_info *d;
 	dev_t pdev;
-	int unit, devtype;
+	int i, cont, unit, devtype;
 
 	if (*dev != NODEV)
 		return;
@@ -1028,13 +1027,18 @@ gotit:
 	if (unit == -1 || unit > devclass_get_maxunit(pcm_devclass))
 		return;
 
-	d = devclass_get_softc(pcm_devclass, unit);
-
-	pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, d->defaultchan++));
-	if (d->defaultchan >= d->chancount)
-		d->defaultchan = 0;
-	if (pdev->si_flags & SI_NAMED)
-		*dev = pdev;
+	cont = 1;
+	for (i = 0; cont; i++) {
+		pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i));
+		if (pdev->si_flags & SI_NAMED) {
+			if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) {
+				*dev = pdev;
+				return;
+			}
+		} else {
+			cont = 0;
+		}
+	}
 }
 
 static void
diff --git a/sys/dev/sound/pcm/sndstat.c b/sys/dev/sound/pcm/sndstat.c
index 030b14b..25c71ed 100644
--- a/sys/dev/sound/pcm/sndstat.c
+++ b/sys/dev/sound/pcm/sndstat.c
@@ -147,7 +147,7 @@ sndstat_prepare(struct sbuf *s)
 		snd_mtxlock(d->lock);
 		dev = devclass_get_device(pcm_devclass, i);
 		sbuf_printf(s, "pcm%d: <%s> %s", i, device_get_desc(dev), d->status);
-		if (d->chancount > 0) {
+		if (!SLIST_EMPTY(&d->channels)) {
 			pc = rc = vc = 0;
 			SLIST_FOREACH(sce, &d->channels, link) {
 				c = sce->channel;
diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
index ba41858..89cd4d0 100644
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -166,7 +166,7 @@ sysctl_hw_sndunit(SYSCTL_HANDLER_ARGS)
 		if (unit < 0 || unit > devclass_get_maxunit(pcm_devclass))
 			return EINVAL;
 		d = devclass_get_softc(pcm_devclass, unit);
-		if (d == NULL || d->chancount == 0)
+		if (d == NULL || SLIST_EMPTY(&d->channels))
 			return EINVAL;
 		snd_unit = unit;
 	}
@@ -371,7 +371,6 @@ pcm_register(device_t dev, void *devinfo, int numplay, int numrec)
 	d->dev = dev;
 	d->devinfo = devinfo;
 	d->chancount = 0;
-	d->defaultchan = 0;
 	d->inprog = 0;
 
 	if (((numplay == 0) || (numrec == 0)) && (numplay != numrec))
@@ -428,7 +427,7 @@ pcm_unregister(device_t dev)
 	d->sysctl_tree_top = NULL;
 	sysctl_ctx_free(&d->sysctl_tree);
 #endif
-	while (d->chancount > 0)
+	while (!SLIST_EMPTY(&d->channels))
 		pcm_killchan(dev);
 
 	chn_kill(d->fakechan);
diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h
index 886ddb7..124c9db 100644
--- a/sys/dev/sound/pcm/sound.h
+++ b/sys/dev/sound/pcm/sound.h
@@ -108,8 +108,7 @@ struct snddev_channel {
 struct snddev_info {
 	SLIST_HEAD(, snddev_channel) channels;
 	struct pcm_channel *fakechan;
-	unsigned chancount, defaultchan;
-	/* struct snd_mixer *mixer; */
+	unsigned chancount;
 	unsigned flags;
 	int inprog;
 	void *devinfo;
-- 
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