freebsd-dev/sys/dev/sound/pcm/vchan.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

993 lines
22 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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("$FreeBSD$");
/*
* [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_RWTUN,
&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_RWTUN,
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_RWTUN,
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_RWTUN,
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_RWTUN,
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_RWTUN,
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_RWTUN,
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_RWTUN,
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_RWTUN,
VCHAN_SYSCTL_DATA(unit, REC), VCHAN_SYSCTL_DATA_SIZE,
sysctl_dev_pcm_vchanformat, "A", "virtual channel mixing format");
}