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/*-
* Copyright (c) 2006-2009 Ariff Abdullah <ariff@FreeBSD.org>
* Copyright (c) 2001 Cameron Grant <cg@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* Almost entirely rewritten to add multi-format/channels mixing support. */
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/vchan.h>
SND_DECLARE_FILE("$FreeBSD: release/9.1.0/sys/dev/sound/pcm/vchan.c 193640 2009-06-07 19:12:08Z ariff $");
/*
* [ac3 , dts , linear , 0, linear, 0]
*/
#define FMTLIST_MAX 6
#define FMTLIST_OFFSET 4
#define DIGFMTS_MAX 2
#ifdef SND_DEBUG
static int snd_passthrough_verbose = 0;
SYSCTL_INT(_hw_snd, OID_AUTO, passthrough_verbose, CTLFLAG_RW,
&snd_passthrough_verbose, 0, "passthrough verbosity");
#endif
struct vchan_info {
struct pcm_channel *channel;
struct pcmchan_caps caps;
uint32_t fmtlist[FMTLIST_MAX];
int trigger;
};
static void *
vchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b,
struct pcm_channel *c, int dir)
{
struct vchan_info *info;
struct pcm_channel *p;
uint32_t i, j, *fmtlist;
KASSERT(dir == PCMDIR_PLAY || dir == PCMDIR_REC,
("vchan_init: bad direction"));
KASSERT(c != NULL && c->parentchannel != NULL,
("vchan_init: bad channels"));
info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK | M_ZERO);
info->channel = c;
info->trigger = PCMTRIG_STOP;
p = c->parentchannel;
CHN_LOCK(p);
fmtlist = chn_getcaps(p)->fmtlist;
for (i = 0, j = 0; fmtlist[i] != 0 && j < DIGFMTS_MAX; i++) {
if (fmtlist[i] & AFMT_PASSTHROUGH)
info->fmtlist[j++] = fmtlist[i];
}
if (p->format & AFMT_VCHAN)
info->fmtlist[j] = p->format;
else
info->fmtlist[j] = VCHAN_DEFAULT_FORMAT;
info->caps.fmtlist = info->fmtlist +
((p->flags & CHN_F_VCHAN_DYNAMIC) ? 0 : FMTLIST_OFFSET);
CHN_UNLOCK(p);
c->flags |= CHN_F_VIRTUAL;
return (info);
}
static int
vchan_free(kobj_t obj, void *data)
{
free(data, M_DEVBUF);
return (0);
}
static int
vchan_setformat(kobj_t obj, void *data, uint32_t format)
{
struct vchan_info *info;
info = data;
CHN_LOCKASSERT(info->channel);
if (!snd_fmtvalid(format, info->caps.fmtlist))
return (-1);
return (0);
}
static uint32_t
vchan_setspeed(kobj_t obj, void *data, uint32_t speed)
{
struct vchan_info *info;
info = data;
CHN_LOCKASSERT(info->channel);
return (info->caps.maxspeed);
}
static int
vchan_trigger(kobj_t obj, void *data, int go)
{
struct vchan_info *info;
struct pcm_channel *c, *p;
int ret, otrigger;
info = data;
if (!PCMTRIG_COMMON(go) || go == info->trigger)
return (0);
c = info->channel;
p = c->parentchannel;
otrigger = info->trigger;
info->trigger = go;
CHN_LOCKASSERT(c);
CHN_UNLOCK(c);
CHN_LOCK(p);
switch (go) {
case PCMTRIG_START:
if (otrigger != PCMTRIG_START)
CHN_INSERT_HEAD(p, c, children.busy);
break;
case PCMTRIG_STOP:
case PCMTRIG_ABORT:
if (otrigger == PCMTRIG_START)
CHN_REMOVE(p, c, children.busy);
break;
default:
break;
}
ret = chn_notify(p, CHN_N_TRIGGER);
CHN_LOCK(c);
if (ret == 0 && go == PCMTRIG_START && VCHAN_SYNC_REQUIRED(c))
ret = vchan_sync(c);
CHN_UNLOCK(c);
CHN_UNLOCK(p);
CHN_LOCK(c);
return (ret);
}
static struct pcmchan_caps *
vchan_getcaps(kobj_t obj, void *data)
{
struct vchan_info *info;
struct pcm_channel *c;
uint32_t pformat, pspeed, pflags, i;
info = data;
c = info->channel;
pformat = c->parentchannel->format;
pspeed = c->parentchannel->speed;
pflags = c->parentchannel->flags;
CHN_LOCKASSERT(c);
if (pflags & CHN_F_VCHAN_DYNAMIC) {
info->caps.fmtlist = info->fmtlist;
if (pformat & AFMT_VCHAN) {
for (i = 0; info->caps.fmtlist[i] != 0; i++) {
if (info->caps.fmtlist[i] & AFMT_PASSTHROUGH)
continue;
break;
}
info->caps.fmtlist[i] = pformat;
}
if (c->format & AFMT_PASSTHROUGH)
info->caps.minspeed = c->speed;
else
info->caps.minspeed = pspeed;
info->caps.maxspeed = info->caps.minspeed;
} else {
info->caps.fmtlist = info->fmtlist + FMTLIST_OFFSET;
if (pformat & AFMT_VCHAN)
info->caps.fmtlist[0] = pformat;
else {
device_printf(c->dev,
"%s(): invalid vchan format 0x%08x",
__func__, pformat);
info->caps.fmtlist[0] = VCHAN_DEFAULT_FORMAT;
}
info->caps.minspeed = pspeed;
info->caps.maxspeed = info->caps.minspeed;
}
return (&info->caps);
}
static struct pcmchan_matrix *
vchan_getmatrix(kobj_t obj, void *data, uint32_t format)
{
return (feeder_matrix_format_map(format));
}
static kobj_method_t vchan_methods[] = {
KOBJMETHOD(channel_init, vchan_init),
KOBJMETHOD(channel_free, vchan_free),
KOBJMETHOD(channel_setformat, vchan_setformat),
KOBJMETHOD(channel_setspeed, vchan_setspeed),
KOBJMETHOD(channel_trigger, vchan_trigger),
KOBJMETHOD(channel_getcaps, vchan_getcaps),
KOBJMETHOD(channel_getmatrix, vchan_getmatrix),
KOBJMETHOD_END
};
CHANNEL_DECLARE(vchan);
static void
pcm_getparentchannel(struct snddev_info *d,
struct pcm_channel **wrch, struct pcm_channel **rdch)
{
struct pcm_channel **ch, *wch, *rch, *c;
KASSERT(d != NULL, ("%s(): NULL snddev_info", __func__));
PCM_BUSYASSERT(d);
PCM_UNLOCKASSERT(d);
wch = NULL;
rch = NULL;
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
ch = (c->direction == PCMDIR_PLAY) ? &wch : &rch;
if (c->flags & CHN_F_VIRTUAL) {
/* Sanity check */
if (*ch != NULL && *ch != c->parentchannel) {
CHN_UNLOCK(c);
*ch = NULL;
break;
}
} else if (c->flags & CHN_F_HAS_VCHAN) {
/* No way!! */
if (*ch != NULL) {
CHN_UNLOCK(c);
*ch = NULL;
break;
}
*ch = c;
}
CHN_UNLOCK(c);
}
if (wrch != NULL)
*wrch = wch;
if (rdch != NULL)
*rdch = rch;
}
static int
sysctl_dev_pcm_vchans(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int direction, vchancount;
int err, cnt;
d = devclass_get_softc(pcm_devclass, VCHAN_SYSCTL_UNIT(oidp->oid_arg1));
if (!PCM_REGISTERED(d) || !(d->flags & SD_F_AUTOVCHAN))
return (EINVAL);
PCM_LOCK(d);
PCM_WAIT(d);
switch (VCHAN_SYSCTL_DIR(oidp->oid_arg1)) {
case VCHAN_PLAY:
direction = PCMDIR_PLAY;
vchancount = d->pvchancount;
cnt = d->playcount;
break;
case VCHAN_REC:
direction = PCMDIR_REC;
vchancount = d->rvchancount;
cnt = d->reccount;
break;
default:
PCM_UNLOCK(d);
return (EINVAL);
break;
}
if (cnt < 1) {
PCM_UNLOCK(d);
return (ENODEV);
}
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
cnt = vchancount;
err = sysctl_handle_int(oidp, &cnt, 0, req);
if (err == 0 && req->newptr != NULL && vchancount != cnt) {
if (cnt < 0)
cnt = 0;
if (cnt > SND_MAXVCHANS)
cnt = SND_MAXVCHANS;
err = pcm_setvchans(d, direction, cnt, -1);
}
PCM_RELEASE_QUICK(d);
return err;
}
static int
sysctl_dev_pcm_vchanmode(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
struct pcm_channel *c;
uint32_t dflags;
int direction, ret;
char dtype[16];
d = devclass_get_softc(pcm_devclass, VCHAN_SYSCTL_UNIT(oidp->oid_arg1));
if (!PCM_REGISTERED(d) || !(d->flags & SD_F_AUTOVCHAN))
return (EINVAL);
PCM_LOCK(d);
PCM_WAIT(d);
switch (VCHAN_SYSCTL_DIR(oidp->oid_arg1)) {
case VCHAN_PLAY:
direction = PCMDIR_PLAY;
break;
case VCHAN_REC:
direction = PCMDIR_REC;
break;
default:
PCM_UNLOCK(d);
return (EINVAL);
break;
}
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
if (direction == PCMDIR_PLAY)
pcm_getparentchannel(d, &c, NULL);
else
pcm_getparentchannel(d, NULL, &c);
if (c == NULL) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
KASSERT(direction == c->direction, ("%s(): invalid direction %d/%d",
__func__, direction, c->direction));
CHN_LOCK(c);
if (c->flags & CHN_F_VCHAN_PASSTHROUGH)
strlcpy(dtype, "passthrough", sizeof(dtype));
else if (c->flags & CHN_F_VCHAN_ADAPTIVE)
strlcpy(dtype, "adaptive", sizeof(dtype));
else
strlcpy(dtype, "fixed", sizeof(dtype));
CHN_UNLOCK(c);
ret = sysctl_handle_string(oidp, dtype, sizeof(dtype), req);
if (ret == 0 && req->newptr != NULL) {
if (strcasecmp(dtype, "passthrough") == 0 ||
strcmp(dtype, "1") == 0)
dflags = CHN_F_VCHAN_PASSTHROUGH;
else if (strcasecmp(dtype, "adaptive") == 0 ||
strcmp(dtype, "2") == 0)
dflags = CHN_F_VCHAN_ADAPTIVE;
else if (strcasecmp(dtype, "fixed") == 0 ||
strcmp(dtype, "0") == 0)
dflags = 0;
else {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
CHN_LOCK(c);
if (dflags == (c->flags & CHN_F_VCHAN_DYNAMIC) ||
(c->flags & CHN_F_PASSTHROUGH)) {
CHN_UNLOCK(c);
PCM_RELEASE_QUICK(d);
return (0);
}
c->flags &= ~CHN_F_VCHAN_DYNAMIC;
c->flags |= dflags;
CHN_UNLOCK(c);
}
PCM_RELEASE_QUICK(d);
return (ret);
}
/*
* On the fly vchan rate/format settings
*/
#define VCHAN_ACCESSIBLE(c) (!((c)->flags & (CHN_F_PASSTHROUGH | \
CHN_F_EXCLUSIVE)) && \
(((c)->flags & CHN_F_VCHAN_DYNAMIC) || \
CHN_STOPPED(c)))
static int
sysctl_dev_pcm_vchanrate(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
struct pcm_channel *c, *ch;
struct pcmchan_caps *caps;
int *vchanrate, vchancount, direction, ret, newspd, restart;
d = devclass_get_softc(pcm_devclass, VCHAN_SYSCTL_UNIT(oidp->oid_arg1));
if (!PCM_REGISTERED(d) || !(d->flags & SD_F_AUTOVCHAN))
return (EINVAL);
PCM_LOCK(d);
PCM_WAIT(d);
switch (VCHAN_SYSCTL_DIR(oidp->oid_arg1)) {
case VCHAN_PLAY:
direction = PCMDIR_PLAY;
vchancount = d->pvchancount;
vchanrate = &d->pvchanrate;
break;
case VCHAN_REC:
direction = PCMDIR_REC;
vchancount = d->rvchancount;
vchanrate = &d->rvchanrate;
break;
default:
PCM_UNLOCK(d);
return (EINVAL);
break;
}
if (vchancount < 1) {
PCM_UNLOCK(d);
return (EINVAL);
}
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
if (direction == PCMDIR_PLAY)
pcm_getparentchannel(d, &c, NULL);
else
pcm_getparentchannel(d, NULL, &c);
if (c == NULL) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
KASSERT(direction == c->direction, ("%s(): invalid direction %d/%d",
__func__, direction, c->direction));
CHN_LOCK(c);
newspd = c->speed;
CHN_UNLOCK(c);
ret = sysctl_handle_int(oidp, &newspd, 0, req);
if (ret != 0 || req->newptr == NULL) {
PCM_RELEASE_QUICK(d);
return (ret);
}
if (newspd < 1 || newspd < feeder_rate_min ||
newspd > feeder_rate_max) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
CHN_LOCK(c);
if (newspd != c->speed && VCHAN_ACCESSIBLE(c)) {
if (CHN_STARTED(c)) {
chn_abort(c);
restart = 1;
} else
restart = 0;
if (feeder_rate_round) {
caps = chn_getcaps(c);
RANGE(newspd, caps->minspeed, caps->maxspeed);
newspd = CHANNEL_SETSPEED(c->methods,
c->devinfo, newspd);
}
ret = chn_reset(c, c->format, newspd);
if (ret == 0) {
*vchanrate = c->speed;
if (restart != 0) {
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
if (VCHAN_SYNC_REQUIRED(ch))
vchan_sync(ch);
CHN_UNLOCK(ch);
}
c->flags |= CHN_F_DIRTY;
ret = chn_start(c, 1);
}
}
}
CHN_UNLOCK(c);
PCM_RELEASE_QUICK(d);
return (ret);
}
static int
sysctl_dev_pcm_vchanformat(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
struct pcm_channel *c, *ch;
uint32_t newfmt;
int *vchanformat, vchancount, direction, ret, restart;
char fmtstr[AFMTSTR_LEN];
d = devclass_get_softc(pcm_devclass, VCHAN_SYSCTL_UNIT(oidp->oid_arg1));
if (!PCM_REGISTERED(d) || !(d->flags & SD_F_AUTOVCHAN))
return (EINVAL);
PCM_LOCK(d);
PCM_WAIT(d);
switch (VCHAN_SYSCTL_DIR(oidp->oid_arg1)) {
case VCHAN_PLAY:
direction = PCMDIR_PLAY;
vchancount = d->pvchancount;
vchanformat = &d->pvchanformat;
break;
case VCHAN_REC:
direction = PCMDIR_REC;
vchancount = d->rvchancount;
vchanformat = &d->rvchanformat;
break;
default:
PCM_UNLOCK(d);
return (EINVAL);
break;
}
if (vchancount < 1) {
PCM_UNLOCK(d);
return (EINVAL);
}
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
if (direction == PCMDIR_PLAY)
pcm_getparentchannel(d, &c, NULL);
else
pcm_getparentchannel(d, NULL, &c);
if (c == NULL) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
KASSERT(direction == c->direction, ("%s(): invalid direction %d/%d",
__func__, direction, c->direction));
CHN_LOCK(c);
bzero(fmtstr, sizeof(fmtstr));
if (snd_afmt2str(c->format, fmtstr, sizeof(fmtstr)) != c->format)
strlcpy(fmtstr, "<ERROR>", sizeof(fmtstr));
CHN_UNLOCK(c);
ret = sysctl_handle_string(oidp, fmtstr, sizeof(fmtstr), req);
if (ret != 0 || req->newptr == NULL) {
PCM_RELEASE_QUICK(d);
return (ret);
}
newfmt = snd_str2afmt(fmtstr);
if (newfmt == 0 || !(newfmt & AFMT_VCHAN)) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
CHN_LOCK(c);
if (newfmt != c->format && VCHAN_ACCESSIBLE(c)) {
if (CHN_STARTED(c)) {
chn_abort(c);
restart = 1;
} else
restart = 0;
ret = chn_reset(c, newfmt, c->speed);
if (ret == 0) {
*vchanformat = c->format;
if (restart != 0) {
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
if (VCHAN_SYNC_REQUIRED(ch))
vchan_sync(ch);
CHN_UNLOCK(ch);
}
c->flags |= CHN_F_DIRTY;
ret = chn_start(c, 1);
}
}
}
CHN_UNLOCK(c);
PCM_RELEASE_QUICK(d);
return (ret);
}
/* virtual channel interface */
#define VCHAN_FMT_HINT(x) ((x) == PCMDIR_PLAY_VIRTUAL) ? \
"play.vchanformat" : "rec.vchanformat"
#define VCHAN_SPD_HINT(x) ((x) == PCMDIR_PLAY_VIRTUAL) ? \
"play.vchanrate" : "rec.vchanrate"
int
vchan_create(struct pcm_channel *parent, int num)
{
struct snddev_info *d;
struct pcm_channel *ch;
struct pcmchan_caps *parent_caps;
uint32_t vchanfmt, vchanspd;
int ret, direction, r, save;
d = parent->parentsnddev;
PCM_BUSYASSERT(d);
CHN_LOCKASSERT(parent);
if (!(parent->flags & CHN_F_BUSY))
return (EBUSY);
if (!(parent->direction == PCMDIR_PLAY ||
parent->direction == PCMDIR_REC))
return (EINVAL);
d = parent->parentsnddev;
CHN_UNLOCK(parent);
PCM_LOCK(d);
if (parent->direction == PCMDIR_PLAY) {
direction = PCMDIR_PLAY_VIRTUAL;
vchanfmt = d->pvchanformat;
vchanspd = d->pvchanrate;
} else {
direction = PCMDIR_REC_VIRTUAL;
vchanfmt = d->rvchanformat;
vchanspd = d->rvchanrate;
}
/* create a new playback channel */
ch = pcm_chn_create(d, parent, &vchan_class, direction, num, parent);
if (ch == NULL) {
PCM_UNLOCK(d);
CHN_LOCK(parent);
return (ENODEV);
}
/* add us to our grandparent's channel list */
ret = pcm_chn_add(d, ch);
PCM_UNLOCK(d);
if (ret != 0) {
pcm_chn_destroy(ch);
CHN_LOCK(parent);
return (ret);
}
CHN_LOCK(parent);
/*
* Add us to our parent channel's children in reverse order
* so future destruction will pick the last (biggest number)
* channel.
*/
CHN_INSERT_SORT_DESCEND(parent, ch, children);
if (parent->flags & CHN_F_HAS_VCHAN)
return (0);
parent->flags |= CHN_F_HAS_VCHAN;
parent_caps = chn_getcaps(parent);
if (parent_caps == NULL)
ret = EINVAL;
save = 0;
if (ret == 0 && vchanfmt == 0) {
const char *vfmt;
CHN_UNLOCK(parent);
r = resource_string_value(device_get_name(parent->dev),
device_get_unit(parent->dev), VCHAN_FMT_HINT(direction),
&vfmt);
CHN_LOCK(parent);
if (r != 0)
vfmt = NULL;
if (vfmt != NULL) {
vchanfmt = snd_str2afmt(vfmt);
if (vchanfmt != 0 && !(vchanfmt & AFMT_VCHAN))
vchanfmt = 0;
}
if (vchanfmt == 0)
vchanfmt = VCHAN_DEFAULT_FORMAT;
save = 1;
}
if (ret == 0 && vchanspd == 0) {
/*
* This is very sad. Few soundcards advertised as being
* able to do (insanely) higher/lower speed, but in
* reality, they simply can't. At least, we give user chance
* to set sane value via kernel hints or sysctl.
*/
CHN_UNLOCK(parent);
r = resource_int_value(device_get_name(parent->dev),
device_get_unit(parent->dev), VCHAN_SPD_HINT(direction),
&vchanspd);
CHN_LOCK(parent);
if (r != 0) {
/*
* No saved value, no hint, NOTHING.
*
* Workaround for sb16 running
* poorly at 45k / 49k.
*/
switch (parent_caps->maxspeed) {
case 45000:
case 49000:
vchanspd = 44100;
break;
default:
vchanspd = VCHAN_DEFAULT_RATE;
if (vchanspd > parent_caps->maxspeed)
vchanspd = parent_caps->maxspeed;
break;
}
if (vchanspd < parent_caps->minspeed)
vchanspd = parent_caps->minspeed;
}
save = 1;
}
if (ret == 0) {
/*
* Limit the speed between feeder_rate_min <-> feeder_rate_max.
*/
if (vchanspd < feeder_rate_min)
vchanspd = feeder_rate_min;
if (vchanspd > feeder_rate_max)
vchanspd = feeder_rate_max;
if (feeder_rate_round) {
RANGE(vchanspd, parent_caps->minspeed,
parent_caps->maxspeed);
vchanspd = CHANNEL_SETSPEED(parent->methods,
parent->devinfo, vchanspd);
}
ret = chn_reset(parent, vchanfmt, vchanspd);
}
if (ret == 0 && save) {
/*
* Save new value.
*/
if (direction == PCMDIR_PLAY_VIRTUAL) {
d->pvchanformat = parent->format;
d->pvchanrate = parent->speed;
} else {
d->rvchanformat = parent->format;
d->rvchanrate = parent->speed;
}
}
/*
* If the parent channel supports digital format,
* enable passthrough mode.
*/
if (ret == 0 && snd_fmtvalid(AFMT_PASSTHROUGH, parent_caps->fmtlist)) {
parent->flags &= ~CHN_F_VCHAN_DYNAMIC;
parent->flags |= CHN_F_VCHAN_PASSTHROUGH;
}
if (ret != 0) {
CHN_REMOVE(parent, ch, children);
parent->flags &= ~CHN_F_HAS_VCHAN;
CHN_UNLOCK(parent);
PCM_LOCK(d);
if (pcm_chn_remove(d, ch) == 0) {
PCM_UNLOCK(d);
pcm_chn_destroy(ch);
} else
PCM_UNLOCK(d);
CHN_LOCK(parent);
}
return (ret);
}
int
vchan_destroy(struct pcm_channel *c)
{
struct pcm_channel *parent;
struct snddev_info *d;
int ret;
KASSERT(c != NULL && c->parentchannel != NULL &&
c->parentsnddev != NULL, ("%s(): invalid channel=%p",
__func__, c));
CHN_LOCKASSERT(c);
d = c->parentsnddev;
parent = c->parentchannel;
PCM_BUSYASSERT(d);
CHN_LOCKASSERT(parent);
CHN_UNLOCK(c);
if (!(parent->flags & CHN_F_BUSY))
return (EBUSY);
if (CHN_EMPTY(parent, children))
return (EINVAL);
/* remove us from our parent's children list */
CHN_REMOVE(parent, c, children);
if (CHN_EMPTY(parent, children)) {
parent->flags &= ~(CHN_F_BUSY | CHN_F_HAS_VCHAN);
chn_reset(parent, parent->format, parent->speed);
}
CHN_UNLOCK(parent);
/* remove us from our grandparent's channel list */
PCM_LOCK(d);
ret = pcm_chn_remove(d, c);
PCM_UNLOCK(d);
/* destroy ourselves */
if (ret == 0)
ret = pcm_chn_destroy(c);
CHN_LOCK(parent);
return (ret);
}
int
#ifdef SND_DEBUG
vchan_passthrough(struct pcm_channel *c, const char *caller)
#else
vchan_sync(struct pcm_channel *c)
#endif
{
int ret;
KASSERT(c != NULL && c->parentchannel != NULL &&
(c->flags & CHN_F_VIRTUAL),
("%s(): invalid passthrough", __func__));
CHN_LOCKASSERT(c);
CHN_LOCKASSERT(c->parentchannel);
sndbuf_setspd(c->bufhard, c->parentchannel->speed);
c->flags |= CHN_F_PASSTHROUGH;
ret = feeder_chain(c);
c->flags &= ~(CHN_F_DIRTY | CHN_F_PASSTHROUGH);
if (ret != 0)
c->flags |= CHN_F_DIRTY;
#ifdef SND_DEBUG
if (snd_passthrough_verbose != 0) {
char *devname, buf[CHN_NAMELEN];
devname = dsp_unit2name(buf, sizeof(buf), c->unit);
device_printf(c->dev,
"%s(%s/%s) %s() -> re-sync err=%d\n",
__func__, (devname != NULL) ? devname : "dspX", c->comm,
caller, ret);
}
#endif
return (ret);
}
void
vchan_initsys(device_t dev)
{
struct snddev_info *d;
int unit;
unit = device_get_unit(dev);
d = device_get_softc(dev);
/* Play */
SYSCTL_ADD_PROC(&d->play_sysctl_ctx,
SYSCTL_CHILDREN(d->play_sysctl_tree),
OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, PLAY), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchans, "I", "total allocated virtual channel");
SYSCTL_ADD_PROC(&d->play_sysctl_ctx,
SYSCTL_CHILDREN(d->play_sysctl_tree),
OID_AUTO, "vchanmode", CTLTYPE_STRING | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, PLAY), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanmode, "A",
"vchan format/rate selection: 0=fixed, 1=passthrough, 2=adaptive");
SYSCTL_ADD_PROC(&d->play_sysctl_ctx,
SYSCTL_CHILDREN(d->play_sysctl_tree),
OID_AUTO, "vchanrate", CTLTYPE_INT | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, PLAY), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanrate, "I", "virtual channel mixing speed/rate");
SYSCTL_ADD_PROC(&d->play_sysctl_ctx,
SYSCTL_CHILDREN(d->play_sysctl_tree),
OID_AUTO, "vchanformat", CTLTYPE_STRING | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, PLAY), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanformat, "A", "virtual channel mixing format");
/* Rec */
SYSCTL_ADD_PROC(&d->rec_sysctl_ctx,
SYSCTL_CHILDREN(d->rec_sysctl_tree),
OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, REC), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchans, "I", "total allocated virtual channel");
SYSCTL_ADD_PROC(&d->rec_sysctl_ctx,
SYSCTL_CHILDREN(d->rec_sysctl_tree),
OID_AUTO, "vchanmode", CTLTYPE_STRING | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, REC), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanmode, "A",
"vchan format/rate selection: 0=fixed, 1=passthrough, 2=adaptive");
SYSCTL_ADD_PROC(&d->rec_sysctl_ctx,
SYSCTL_CHILDREN(d->rec_sysctl_tree),
OID_AUTO, "vchanrate", CTLTYPE_INT | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, REC), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanrate, "I", "virtual channel mixing speed/rate");
SYSCTL_ADD_PROC(&d->rec_sysctl_ctx,
SYSCTL_CHILDREN(d->rec_sysctl_tree),
OID_AUTO, "vchanformat", CTLTYPE_STRING | CTLFLAG_RW,
VCHAN_SYSCTL_DATA(unit, REC), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanformat, "A", "virtual channel mixing format");
}