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freebsd-skq/sys/dev/sound/pcm/channel.c
mav 68b6eb44b6 Make sound(4) more flexible in setting soft buffer and block sizes when 
hardware imposes strict limitations on hard buffer and block sizes.

Previous code set soft buffer to be no smaller then hard buffer. On some
cards with fixed 64K physical buffer that caused up to 800ms play latency.
New code allows to set soft buffer size down to just two blocks of the hard
buffer and to not write more then that size ahead to the hardware buffer.
As result of that change I was able to reduce full practically measured
record-playback loop delay in those conditions down to only about 115ms
with theoretical playback latency of only about 50ms.

New code works fine for both vchans and direct cases. In both cases sound(4)
tries to follow hw.snd.latency_profile and hw.snd.latency values and
application-requested buffer and block sizes as much as limitation of two
hardware blocks allows.

Reviewed by:	silence on multimedia@
2012-01-31 21:46:28 +00:00

2546 lines
62 KiB
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/*-
* Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
* Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
* Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
* Portions Copyright (c) Luigi Rizzo <luigi@FreeBSD.org> - 1997-99
* 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.
*/
#include "opt_isa.h"
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/vchan.h>
#include "feeder_if.h"
SND_DECLARE_FILE("$FreeBSD$");
int report_soft_formats = 1;
SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_formats, CTLFLAG_RW,
&report_soft_formats, 1, "report software-emulated formats");
int report_soft_matrix = 1;
SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_matrix, CTLFLAG_RW,
&report_soft_matrix, 1, "report software-emulated channel matrixing");
int chn_latency = CHN_LATENCY_DEFAULT;
TUNABLE_INT("hw.snd.latency", &chn_latency);
static int
sysctl_hw_snd_latency(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = chn_latency;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err != 0 || req->newptr == NULL)
return err;
if (val < CHN_LATENCY_MIN || val > CHN_LATENCY_MAX)
err = EINVAL;
else
chn_latency = val;
return err;
}
SYSCTL_PROC(_hw_snd, OID_AUTO, latency, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_latency, "I",
"buffering latency (0=low ... 10=high)");
int chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT;
TUNABLE_INT("hw.snd.latency_profile", &chn_latency_profile);
static int
sysctl_hw_snd_latency_profile(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = chn_latency_profile;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err != 0 || req->newptr == NULL)
return err;
if (val < CHN_LATENCY_PROFILE_MIN || val > CHN_LATENCY_PROFILE_MAX)
err = EINVAL;
else
chn_latency_profile = val;
return err;
}
SYSCTL_PROC(_hw_snd, OID_AUTO, latency_profile, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_latency_profile, "I",
"buffering latency profile (0=aggresive 1=safe)");
static int chn_timeout = CHN_TIMEOUT;
TUNABLE_INT("hw.snd.timeout", &chn_timeout);
#ifdef SND_DEBUG
static int
sysctl_hw_snd_timeout(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = chn_timeout;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err != 0 || req->newptr == NULL)
return err;
if (val < CHN_TIMEOUT_MIN || val > CHN_TIMEOUT_MAX)
err = EINVAL;
else
chn_timeout = val;
return err;
}
SYSCTL_PROC(_hw_snd, OID_AUTO, timeout, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_timeout, "I",
"interrupt timeout (1 - 10) seconds");
#endif
static int chn_vpc_autoreset = 1;
TUNABLE_INT("hw.snd.vpc_autoreset", &chn_vpc_autoreset);
SYSCTL_INT(_hw_snd, OID_AUTO, vpc_autoreset, CTLFLAG_RW,
&chn_vpc_autoreset, 0, "automatically reset channels volume to 0db");
static int chn_vol_0db_pcm = SND_VOL_0DB_PCM;
TUNABLE_INT("hw.snd.vpc_0db", &chn_vol_0db_pcm);
static void
chn_vpc_proc(int reset, int db)
{
struct snddev_info *d;
struct pcm_channel *c;
int i;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!PCM_REGISTERED(d))
continue;
PCM_LOCK(d);
PCM_WAIT(d);
PCM_ACQUIRE(d);
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
CHN_SETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_VOL_0DB, db);
if (reset != 0)
chn_vpc_reset(c, SND_VOL_C_PCM, 1);
CHN_UNLOCK(c);
}
PCM_RELEASE(d);
PCM_UNLOCK(d);
}
}
static int
sysctl_hw_snd_vpc_0db(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = chn_vol_0db_pcm;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err != 0 || req->newptr == NULL)
return (err);
if (val < SND_VOL_0DB_MIN || val > SND_VOL_0DB_MAX)
return (EINVAL);
chn_vol_0db_pcm = val;
chn_vpc_proc(0, val);
return (0);
}
SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_0db, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_vpc_0db, "I",
"0db relative level");
static int
sysctl_hw_snd_vpc_reset(SYSCTL_HANDLER_ARGS)
{
int err, val;
val = 0;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err != 0 || req->newptr == NULL || val == 0)
return (err);
chn_vol_0db_pcm = SND_VOL_0DB_PCM;
chn_vpc_proc(1, SND_VOL_0DB_PCM);
return (0);
}
SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_reset, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_vpc_reset, "I",
"reset volume on all channels");
static int chn_usefrags = 0;
TUNABLE_INT("hw.snd.usefrags", &chn_usefrags);
static int chn_syncdelay = -1;
TUNABLE_INT("hw.snd.syncdelay", &chn_syncdelay);
#ifdef SND_DEBUG
SYSCTL_INT(_hw_snd, OID_AUTO, usefrags, CTLFLAG_RW,
&chn_usefrags, 1, "prefer setfragments() over setblocksize()");
SYSCTL_INT(_hw_snd, OID_AUTO, syncdelay, CTLFLAG_RW,
&chn_syncdelay, 1,
"append (0-1000) millisecond trailing buffer delay on each sync");
#endif
/**
* @brief Channel sync group lock
*
* Clients should acquire this lock @b without holding any channel locks
* before touching syncgroups or the main syncgroup list.
*/
struct mtx snd_pcm_syncgroups_mtx;
MTX_SYSINIT(pcm_syncgroup, &snd_pcm_syncgroups_mtx, "PCM channel sync group lock", MTX_DEF);
/**
* @brief syncgroups' master list
*
* Each time a channel syncgroup is created, it's added to this list. This
* list should only be accessed with @sa snd_pcm_syncgroups_mtx held.
*
* See SNDCTL_DSP_SYNCGROUP for more information.
*/
struct pcm_synclist snd_pcm_syncgroups = SLIST_HEAD_INITIALIZER(snd_pcm_syncgroups);
static void
chn_lockinit(struct pcm_channel *c, int dir)
{
switch (dir) {
case PCMDIR_PLAY:
c->lock = snd_mtxcreate(c->name, "pcm play channel");
cv_init(&c->intr_cv, "pcmwr");
break;
case PCMDIR_PLAY_VIRTUAL:
c->lock = snd_mtxcreate(c->name, "pcm virtual play channel");
cv_init(&c->intr_cv, "pcmwrv");
break;
case PCMDIR_REC:
c->lock = snd_mtxcreate(c->name, "pcm record channel");
cv_init(&c->intr_cv, "pcmrd");
break;
case PCMDIR_REC_VIRTUAL:
c->lock = snd_mtxcreate(c->name, "pcm virtual record channel");
cv_init(&c->intr_cv, "pcmrdv");
break;
default:
panic("%s(): Invalid direction=%d", __func__, dir);
break;
}
cv_init(&c->cv, "pcmchn");
}
static void
chn_lockdestroy(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
CHN_BROADCAST(&c->cv);
CHN_BROADCAST(&c->intr_cv);
cv_destroy(&c->cv);
cv_destroy(&c->intr_cv);
snd_mtxfree(c->lock);
}
/**
* @brief Determine channel is ready for I/O
*
* @retval 1 = ready for I/O
* @retval 0 = not ready for I/O
*/
static int
chn_polltrigger(struct pcm_channel *c)
{
struct snd_dbuf *bs = c->bufsoft;
u_int delta;
CHN_LOCKASSERT(c);
if (c->flags & CHN_F_MMAP) {
if (sndbuf_getprevtotal(bs) < c->lw)
delta = c->lw;
else
delta = sndbuf_gettotal(bs) - sndbuf_getprevtotal(bs);
} else {
if (c->direction == PCMDIR_PLAY)
delta = sndbuf_getfree(bs);
else
delta = sndbuf_getready(bs);
}
return ((delta < c->lw) ? 0 : 1);
}
static void
chn_pollreset(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
sndbuf_updateprevtotal(c->bufsoft);
}
static void
chn_wakeup(struct pcm_channel *c)
{
struct snd_dbuf *bs;
struct pcm_channel *ch;
CHN_LOCKASSERT(c);
bs = c->bufsoft;
if (CHN_EMPTY(c, children.busy)) {
if (SEL_WAITING(sndbuf_getsel(bs)) && chn_polltrigger(c))
selwakeuppri(sndbuf_getsel(bs), PRIBIO);
if (c->flags & CHN_F_SLEEPING) {
/*
* Ok, I can just panic it right here since it is
* quite obvious that we never allow multiple waiters
* from userland. I'm too generous...
*/
CHN_BROADCAST(&c->intr_cv);
}
} else {
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
chn_wakeup(ch);
CHN_UNLOCK(ch);
}
}
}
static int
chn_sleep(struct pcm_channel *c, int timeout)
{
int ret;
CHN_LOCKASSERT(c);
if (c->flags & CHN_F_DEAD)
return (EINVAL);
c->flags |= CHN_F_SLEEPING;
ret = cv_timedwait_sig(&c->intr_cv, c->lock, timeout);
c->flags &= ~CHN_F_SLEEPING;
return ((c->flags & CHN_F_DEAD) ? EINVAL : ret);
}
/*
* chn_dmaupdate() tracks the status of a dma transfer,
* updating pointers.
*/
static unsigned int
chn_dmaupdate(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
unsigned int delta, old, hwptr, amt;
KASSERT(sndbuf_getsize(b) > 0, ("bufsize == 0"));
CHN_LOCKASSERT(c);
old = sndbuf_gethwptr(b);
hwptr = chn_getptr(c);
delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b);
sndbuf_sethwptr(b, hwptr);
if (c->direction == PCMDIR_PLAY) {
amt = min(delta, sndbuf_getready(b));
amt -= amt % sndbuf_getalign(b);
if (amt > 0)
sndbuf_dispose(b, NULL, amt);
} else {
amt = min(delta, sndbuf_getfree(b));
amt -= amt % sndbuf_getalign(b);
if (amt > 0)
sndbuf_acquire(b, NULL, amt);
}
if (snd_verbose > 3 && CHN_STARTED(c) && delta == 0) {
device_printf(c->dev, "WARNING: %s DMA completion "
"too fast/slow ! hwptr=%u, old=%u "
"delta=%u amt=%u ready=%u free=%u\n",
CHN_DIRSTR(c), hwptr, old, delta, amt,
sndbuf_getready(b), sndbuf_getfree(b));
}
return delta;
}
static void
chn_wrfeed(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
unsigned int amt, want, wasfree;
CHN_LOCKASSERT(c);
if ((c->flags & CHN_F_MMAP) && !(c->flags & CHN_F_CLOSING))
sndbuf_acquire(bs, NULL, sndbuf_getfree(bs));
wasfree = sndbuf_getfree(b);
want = min(sndbuf_getsize(b),
imax(0, sndbuf_xbytes(sndbuf_getsize(bs), bs, b) -
sndbuf_getready(b)));
amt = min(wasfree, want);
if (amt > 0)
sndbuf_feed(bs, b, c, c->feeder, amt);
/*
* Possible xruns. There should be no empty space left in buffer.
*/
if (sndbuf_getready(b) < want)
c->xruns++;
if (sndbuf_getfree(b) < wasfree)
chn_wakeup(c);
}
#if 0
static void
chn_wrupdate(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_PLAY, ("%s(): bad channel", __func__));
if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c))
return;
chn_dmaupdate(c);
chn_wrfeed(c);
/* tell the driver we've updated the primary buffer */
chn_trigger(c, PCMTRIG_EMLDMAWR);
}
#endif
static void
chn_wrintr(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
/* update pointers in primary buffer */
chn_dmaupdate(c);
/* ...and feed from secondary to primary */
chn_wrfeed(c);
/* tell the driver we've updated the primary buffer */
chn_trigger(c, PCMTRIG_EMLDMAWR);
}
/*
* user write routine - uiomove data into secondary buffer, trigger if necessary
* if blocking, sleep, rinse and repeat.
*
* called externally, so must handle locking
*/
int
chn_write(struct pcm_channel *c, struct uio *buf)
{
struct snd_dbuf *bs = c->bufsoft;
void *off;
int ret, timeout, sz, t, p;
CHN_LOCKASSERT(c);
ret = 0;
timeout = chn_timeout * hz;
while (ret == 0 && buf->uio_resid > 0) {
sz = min(buf->uio_resid, sndbuf_getfree(bs));
if (sz > 0) {
/*
* The following assumes that the free space in
* the buffer can never be less around the
* unlock-uiomove-lock sequence.
*/
while (ret == 0 && sz > 0) {
p = sndbuf_getfreeptr(bs);
t = min(sz, sndbuf_getsize(bs) - p);
off = sndbuf_getbufofs(bs, p);
CHN_UNLOCK(c);
ret = uiomove(off, t, buf);
CHN_LOCK(c);
sz -= t;
sndbuf_acquire(bs, NULL, t);
}
ret = 0;
if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
ret = chn_start(c, 0);
if (ret != 0)
c->flags |= CHN_F_DEAD;
}
} else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER)) {
/**
* @todo Evaluate whether EAGAIN is truly desirable.
* 4Front drivers behave like this, but I'm
* not sure if it at all violates the "write
* should be allowed to block" model.
*
* The idea is that, while set with CHN_F_NOTRIGGER,
* a channel isn't playing, *but* without this we
* end up with "interrupt timeout / channel dead".
*/
ret = EAGAIN;
} else {
ret = chn_sleep(c, timeout);
if (ret == EAGAIN) {
ret = EINVAL;
c->flags |= CHN_F_DEAD;
device_printf(c->dev, "%s(): %s: "
"play interrupt timeout, channel dead\n",
__func__, c->name);
} else if (ret == ERESTART || ret == EINTR)
c->flags |= CHN_F_ABORTING;
}
}
return (ret);
}
/*
* Feed new data from the read buffer. Can be called in the bottom half.
*/
static void
chn_rdfeed(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
unsigned int amt;
CHN_LOCKASSERT(c);
if (c->flags & CHN_F_MMAP)
sndbuf_dispose(bs, NULL, sndbuf_getready(bs));
amt = sndbuf_getfree(bs);
if (amt > 0)
sndbuf_feed(b, bs, c, c->feeder, amt);
amt = sndbuf_getready(b);
if (amt > 0) {
c->xruns++;
sndbuf_dispose(b, NULL, amt);
}
if (sndbuf_getready(bs) > 0)
chn_wakeup(c);
}
#if 0
static void
chn_rdupdate(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel"));
if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c))
return;
chn_trigger(c, PCMTRIG_EMLDMARD);
chn_dmaupdate(c);
chn_rdfeed(c);
}
#endif
/* read interrupt routine. Must be called with interrupts blocked. */
static void
chn_rdintr(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
/* tell the driver to update the primary buffer if non-dma */
chn_trigger(c, PCMTRIG_EMLDMARD);
/* update pointers in primary buffer */
chn_dmaupdate(c);
/* ...and feed from primary to secondary */
chn_rdfeed(c);
}
/*
* user read routine - trigger if necessary, uiomove data from secondary buffer
* if blocking, sleep, rinse and repeat.
*
* called externally, so must handle locking
*/
int
chn_read(struct pcm_channel *c, struct uio *buf)
{
struct snd_dbuf *bs = c->bufsoft;
void *off;
int ret, timeout, sz, t, p;
CHN_LOCKASSERT(c);
if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
ret = chn_start(c, 0);
if (ret != 0) {
c->flags |= CHN_F_DEAD;
return (ret);
}
}
ret = 0;
timeout = chn_timeout * hz;
while (ret == 0 && buf->uio_resid > 0) {
sz = min(buf->uio_resid, sndbuf_getready(bs));
if (sz > 0) {
/*
* The following assumes that the free space in
* the buffer can never be less around the
* unlock-uiomove-lock sequence.
*/
while (ret == 0 && sz > 0) {
p = sndbuf_getreadyptr(bs);
t = min(sz, sndbuf_getsize(bs) - p);
off = sndbuf_getbufofs(bs, p);
CHN_UNLOCK(c);
ret = uiomove(off, t, buf);
CHN_LOCK(c);
sz -= t;
sndbuf_dispose(bs, NULL, t);
}
ret = 0;
} else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER))
ret = EAGAIN;
else {
ret = chn_sleep(c, timeout);
if (ret == EAGAIN) {
ret = EINVAL;
c->flags |= CHN_F_DEAD;
device_printf(c->dev, "%s(): %s: "
"record interrupt timeout, channel dead\n",
__func__, c->name);
} else if (ret == ERESTART || ret == EINTR)
c->flags |= CHN_F_ABORTING;
}
}
return (ret);
}
void
chn_intr_locked(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
c->interrupts++;
if (c->direction == PCMDIR_PLAY)
chn_wrintr(c);
else
chn_rdintr(c);
}
void
chn_intr(struct pcm_channel *c)
{
if (CHN_LOCKOWNED(c)) {
chn_intr_locked(c);
return;
}
CHN_LOCK(c);
chn_intr_locked(c);
CHN_UNLOCK(c);
}
u_int32_t
chn_start(struct pcm_channel *c, int force)
{
u_int32_t i, j;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
int err;
CHN_LOCKASSERT(c);
/* if we're running, or if we're prevented from triggering, bail */
if (CHN_STARTED(c) || ((c->flags & CHN_F_NOTRIGGER) && !force))
return (EINVAL);
err = 0;
if (force) {
i = 1;
j = 0;
} else {
if (c->direction == PCMDIR_REC) {
i = sndbuf_getfree(bs);
j = (i > 0) ? 1 : sndbuf_getready(b);
} else {
if (sndbuf_getfree(bs) == 0) {
i = 1;
j = 0;
} else {
struct snd_dbuf *pb;
pb = CHN_BUF_PARENT(c, b);
i = sndbuf_xbytes(sndbuf_getready(bs), bs, pb);
j = sndbuf_getalign(pb);
}
}
if (snd_verbose > 3 && CHN_EMPTY(c, children))
device_printf(c->dev, "%s(): %s (%s) threshold "
"i=%d j=%d\n", __func__, CHN_DIRSTR(c),
(c->flags & CHN_F_VIRTUAL) ? "virtual" :
"hardware", i, j);
}
if (i >= j) {
c->flags |= CHN_F_TRIGGERED;
sndbuf_setrun(b, 1);
if (c->flags & CHN_F_CLOSING)
c->feedcount = 2;
else {
c->feedcount = 0;
c->interrupts = 0;
c->xruns = 0;
}
if (c->parentchannel == NULL) {
if (c->direction == PCMDIR_PLAY)
sndbuf_fillsilence_rl(b,
sndbuf_xbytes(sndbuf_getsize(bs), bs, b));
if (snd_verbose > 3)
device_printf(c->dev,
"%s(): %s starting! (%s/%s) "
"(ready=%d force=%d i=%d j=%d "
"intrtimeout=%u latency=%dms)\n",
__func__,
(c->flags & CHN_F_HAS_VCHAN) ?
"VCHAN PARENT" : "HW", CHN_DIRSTR(c),
(c->flags & CHN_F_CLOSING) ? "closing" :
"running",
sndbuf_getready(b),
force, i, j, c->timeout,
(sndbuf_getsize(b) * 1000) /
(sndbuf_getalign(b) * sndbuf_getspd(b)));
}
err = chn_trigger(c, PCMTRIG_START);
}
return (err);
}
void
chn_resetbuf(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
c->blocks = 0;
sndbuf_reset(b);
sndbuf_reset(bs);
}
/*
* chn_sync waits until the space in the given channel goes above
* a threshold. The threshold is checked against fl or rl respectively.
* Assume that the condition can become true, do not check here...
*/
int
chn_sync(struct pcm_channel *c, int threshold)
{
struct snd_dbuf *b, *bs;
int ret, count, hcount, minflush, resid, residp, syncdelay, blksz;
u_int32_t cflag;
CHN_LOCKASSERT(c);
if (c->direction != PCMDIR_PLAY)
return (EINVAL);
bs = c->bufsoft;
if ((c->flags & (CHN_F_DEAD | CHN_F_ABORTING)) ||
(threshold < 1 && sndbuf_getready(bs) < 1))
return (0);
/* if we haven't yet started and nothing is buffered, else start*/
if (CHN_STOPPED(c)) {
if (threshold > 0 || sndbuf_getready(bs) > 0) {
ret = chn_start(c, 1);
if (ret != 0)
return (ret);
} else
return (0);
}
b = CHN_BUF_PARENT(c, c->bufhard);
minflush = threshold + sndbuf_xbytes(sndbuf_getready(b), b, bs);
syncdelay = chn_syncdelay;
if (syncdelay < 0 && (threshold > 0 || sndbuf_getready(bs) > 0))
minflush += sndbuf_xbytes(sndbuf_getsize(b), b, bs);
/*
* Append (0-1000) millisecond trailing buffer (if needed)
* for slower / high latency hardwares (notably USB audio)
* to avoid audible truncation.
*/
if (syncdelay > 0)
minflush += (sndbuf_getalign(bs) * sndbuf_getspd(bs) *
((syncdelay > 1000) ? 1000 : syncdelay)) / 1000;
minflush -= minflush % sndbuf_getalign(bs);
if (minflush > 0) {
threshold = min(minflush, sndbuf_getfree(bs));
sndbuf_clear(bs, threshold);
sndbuf_acquire(bs, NULL, threshold);
minflush -= threshold;
}
resid = sndbuf_getready(bs);
residp = resid;
blksz = sndbuf_getblksz(b);
if (blksz < 1) {
device_printf(c->dev,
"%s(): WARNING: blksz < 1 ! maxsize=%d [%d/%d/%d]\n",
__func__, sndbuf_getmaxsize(b), sndbuf_getsize(b),
sndbuf_getblksz(b), sndbuf_getblkcnt(b));
if (sndbuf_getblkcnt(b) > 0)
blksz = sndbuf_getsize(b) / sndbuf_getblkcnt(b);
if (blksz < 1)
blksz = 1;
}
count = sndbuf_xbytes(minflush + resid, bs, b) / blksz;
hcount = count;
ret = 0;
if (snd_verbose > 3)
device_printf(c->dev, "%s(): [begin] timeout=%d count=%d "
"minflush=%d resid=%d\n", __func__, c->timeout, count,
minflush, resid);
cflag = c->flags & CHN_F_CLOSING;
c->flags |= CHN_F_CLOSING;
while (count > 0 && (resid > 0 || minflush > 0)) {
ret = chn_sleep(c, c->timeout);
if (ret == ERESTART || ret == EINTR) {
c->flags |= CHN_F_ABORTING;
break;
} else if (ret == 0 || ret == EAGAIN) {
resid = sndbuf_getready(bs);
if (resid == residp) {
--count;
if (snd_verbose > 3)
device_printf(c->dev,
"%s(): [stalled] timeout=%d "
"count=%d hcount=%d "
"resid=%d minflush=%d\n",
__func__, c->timeout, count,
hcount, resid, minflush);
} else if (resid < residp && count < hcount) {
++count;
if (snd_verbose > 3)
device_printf(c->dev,
"%s((): [resume] timeout=%d "
"count=%d hcount=%d "
"resid=%d minflush=%d\n",
__func__, c->timeout, count,
hcount, resid, minflush);
}
if (minflush > 0 && sndbuf_getfree(bs) > 0) {
threshold = min(minflush,
sndbuf_getfree(bs));
sndbuf_clear(bs, threshold);
sndbuf_acquire(bs, NULL, threshold);
resid = sndbuf_getready(bs);
minflush -= threshold;
}
residp = resid;
} else
break;
}
c->flags &= ~CHN_F_CLOSING;
c->flags |= cflag;
if (snd_verbose > 3)
device_printf(c->dev,
"%s(): timeout=%d count=%d hcount=%d resid=%d residp=%d "
"minflush=%d ret=%d\n",
__func__, c->timeout, count, hcount, resid, residp,
minflush, ret);
return (0);
}
/* called externally, handle locking */
int
chn_poll(struct pcm_channel *c, int ev, struct thread *td)
{
struct snd_dbuf *bs = c->bufsoft;
int ret;
CHN_LOCKASSERT(c);
if (!(c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED))) {
ret = chn_start(c, 1);
if (ret != 0)
return (0);
}
ret = 0;
if (chn_polltrigger(c)) {
chn_pollreset(c);
ret = ev;
} else
selrecord(td, sndbuf_getsel(bs));
return (ret);
}
/*
* chn_abort terminates a running dma transfer. it may sleep up to 200ms.
* it returns the number of bytes that have not been transferred.
*
* called from: dsp_close, dsp_ioctl, with channel locked
*/
int
chn_abort(struct pcm_channel *c)
{
int missing = 0;
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
CHN_LOCKASSERT(c);
if (CHN_STOPPED(c))
return 0;
c->flags |= CHN_F_ABORTING;
c->flags &= ~CHN_F_TRIGGERED;
/* kill the channel */
chn_trigger(c, PCMTRIG_ABORT);
sndbuf_setrun(b, 0);
if (!(c->flags & CHN_F_VIRTUAL))
chn_dmaupdate(c);
missing = sndbuf_getready(bs);
c->flags &= ~CHN_F_ABORTING;
return missing;
}
/*
* this routine tries to flush the dma transfer. It is called
* on a close of a playback channel.
* first, if there is data in the buffer, but the dma has not yet
* begun, we need to start it.
* next, we wait for the play buffer to drain
* finally, we stop the dma.
*
* called from: dsp_close, not valid for record channels.
*/
int
chn_flush(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
CHN_LOCKASSERT(c);
KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
DEB(printf("chn_flush: c->flags 0x%08x\n", c->flags));
c->flags |= CHN_F_CLOSING;
chn_sync(c, 0);
c->flags &= ~CHN_F_TRIGGERED;
/* kill the channel */
chn_trigger(c, PCMTRIG_ABORT);
sndbuf_setrun(b, 0);
c->flags &= ~CHN_F_CLOSING;
return 0;
}
int
snd_fmtvalid(uint32_t fmt, uint32_t *fmtlist)
{
int i;
for (i = 0; fmtlist[i] != 0; i++) {
if (fmt == fmtlist[i] ||
((fmt & AFMT_PASSTHROUGH) &&
(AFMT_ENCODING(fmt) & fmtlist[i])))
return (1);
}
return (0);
}
static const struct {
char *name, *alias1, *alias2;
uint32_t afmt;
} afmt_tab[] = {
{ "alaw", NULL, NULL, AFMT_A_LAW },
{ "mulaw", NULL, NULL, AFMT_MU_LAW },
{ "u8", "8", NULL, AFMT_U8 },
{ "s8", NULL, NULL, AFMT_S8 },
#if BYTE_ORDER == LITTLE_ENDIAN
{ "s16le", "s16", "16", AFMT_S16_LE },
{ "s16be", NULL, NULL, AFMT_S16_BE },
#else
{ "s16le", NULL, NULL, AFMT_S16_LE },
{ "s16be", "s16", "16", AFMT_S16_BE },
#endif
{ "u16le", NULL, NULL, AFMT_U16_LE },
{ "u16be", NULL, NULL, AFMT_U16_BE },
{ "s24le", NULL, NULL, AFMT_S24_LE },
{ "s24be", NULL, NULL, AFMT_S24_BE },
{ "u24le", NULL, NULL, AFMT_U24_LE },
{ "u24be", NULL, NULL, AFMT_U24_BE },
#if BYTE_ORDER == LITTLE_ENDIAN
{ "s32le", "s32", "32", AFMT_S32_LE },
{ "s32be", NULL, NULL, AFMT_S32_BE },
#else
{ "s32le", NULL, NULL, AFMT_S32_LE },
{ "s32be", "s32", "32", AFMT_S32_BE },
#endif
{ "u32le", NULL, NULL, AFMT_U32_LE },
{ "u32be", NULL, NULL, AFMT_U32_BE },
{ "ac3", NULL, NULL, AFMT_AC3 },
{ NULL, NULL, NULL, 0 }
};
static const struct {
char *name, *alias1, *alias2;
int matrix_id;
} matrix_id_tab[] = {
{ "1.0", "1", "mono", SND_CHN_MATRIX_1_0 },
{ "2.0", "2", "stereo", SND_CHN_MATRIX_2_0 },
{ "2.1", NULL, NULL, SND_CHN_MATRIX_2_1 },
{ "3.0", "3", NULL, SND_CHN_MATRIX_3_0 },
{ "4.0", "4", "quad", SND_CHN_MATRIX_4_0 },
{ "4.1", NULL, NULL, SND_CHN_MATRIX_4_1 },
{ "5.0", "5", NULL, SND_CHN_MATRIX_5_0 },
{ "5.1", "6", NULL, SND_CHN_MATRIX_5_1 },
{ "6.0", NULL, NULL, SND_CHN_MATRIX_6_0 },
{ "6.1", "7", NULL, SND_CHN_MATRIX_6_1 },
{ "7.1", "8", NULL, SND_CHN_MATRIX_7_1 },
{ NULL, NULL, NULL, SND_CHN_MATRIX_UNKNOWN }
};
uint32_t
snd_str2afmt(const char *req)
{
uint32_t i, afmt;
int matrix_id;
char b1[8], b2[8];
i = sscanf(req, "%5[^:]:%6s", b1, b2);
if (i == 1) {
if (strlen(req) != strlen(b1))
return (0);
strlcpy(b2, "2.0", sizeof(b2));
} else if (i == 2) {
if (strlen(req) != (strlen(b1) + 1 + strlen(b2)))
return (0);
} else
return (0);
afmt = 0;
matrix_id = SND_CHN_MATRIX_UNKNOWN;
for (i = 0; afmt == 0 && afmt_tab[i].name != NULL; i++) {
if (strcasecmp(afmt_tab[i].name, b1) == 0 ||
(afmt_tab[i].alias1 != NULL &&
strcasecmp(afmt_tab[i].alias1, b1) == 0) ||
(afmt_tab[i].alias2 != NULL &&
strcasecmp(afmt_tab[i].alias2, b1) == 0)) {
afmt = afmt_tab[i].afmt;
strlcpy(b1, afmt_tab[i].name, sizeof(b1));
}
}
if (afmt == 0)
return (0);
for (i = 0; matrix_id == SND_CHN_MATRIX_UNKNOWN &&
matrix_id_tab[i].name != NULL; i++) {
if (strcmp(matrix_id_tab[i].name, b2) == 0 ||
(matrix_id_tab[i].alias1 != NULL &&
strcmp(matrix_id_tab[i].alias1, b2) == 0) ||
(matrix_id_tab[i].alias2 != NULL &&
strcasecmp(matrix_id_tab[i].alias2, b2) == 0)) {
matrix_id = matrix_id_tab[i].matrix_id;
strlcpy(b2, matrix_id_tab[i].name, sizeof(b2));
}
}
if (matrix_id == SND_CHN_MATRIX_UNKNOWN)
return (0);
#ifndef _KERNEL
printf("Parse OK: '%s' -> '%s:%s' %d\n", req, b1, b2,
(int)(b2[0]) - '0' + (int)(b2[2]) - '0');
#endif
return (SND_FORMAT(afmt, b2[0] - '0' + b2[2] - '0', b2[2] - '0'));
}
uint32_t
snd_afmt2str(uint32_t afmt, char *buf, size_t len)
{
uint32_t i, enc, ch, ext;
char tmp[AFMTSTR_LEN];
if (buf == NULL || len < AFMTSTR_LEN)
return (0);
bzero(tmp, sizeof(tmp));
enc = AFMT_ENCODING(afmt);
ch = AFMT_CHANNEL(afmt);
ext = AFMT_EXTCHANNEL(afmt);
for (i = 0; afmt_tab[i].name != NULL; i++) {
if (enc == afmt_tab[i].afmt) {
strlcpy(tmp, afmt_tab[i].name, sizeof(tmp));
strlcat(tmp, ":", sizeof(tmp));
break;
}
}
if (strlen(tmp) == 0)
return (0);
for (i = 0; matrix_id_tab[i].name != NULL; i++) {
if (ch == (matrix_id_tab[i].name[0] - '0' +
matrix_id_tab[i].name[2] - '0') &&
ext == (matrix_id_tab[i].name[2] - '0')) {
strlcat(tmp, matrix_id_tab[i].name, sizeof(tmp));
break;
}
}
if (strlen(tmp) == 0)
return (0);
strlcpy(buf, tmp, len);
return (snd_str2afmt(buf));
}
int
chn_reset(struct pcm_channel *c, uint32_t fmt, uint32_t spd)
{
int r;
CHN_LOCKASSERT(c);
c->feedcount = 0;
c->flags &= CHN_F_RESET;
c->interrupts = 0;
c->timeout = 1;
c->xruns = 0;
c->flags |= (pcm_getflags(c->dev) & SD_F_BITPERFECT) ?
CHN_F_BITPERFECT : 0;
r = CHANNEL_RESET(c->methods, c->devinfo);
if (r == 0 && fmt != 0 && spd != 0) {
r = chn_setparam(c, fmt, spd);
fmt = 0;
spd = 0;
}
if (r == 0 && fmt != 0)
r = chn_setformat(c, fmt);
if (r == 0 && spd != 0)
r = chn_setspeed(c, spd);
if (r == 0)
r = chn_setlatency(c, chn_latency);
if (r == 0) {
chn_resetbuf(c);
r = CHANNEL_RESETDONE(c->methods, c->devinfo);
}
return r;
}
int
chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction)
{
struct feeder_class *fc;
struct snd_dbuf *b, *bs;
int i, ret;
if (chn_timeout < CHN_TIMEOUT_MIN || chn_timeout > CHN_TIMEOUT_MAX)
chn_timeout = CHN_TIMEOUT;
chn_lockinit(c, dir);
b = NULL;
bs = NULL;
CHN_INIT(c, children);
CHN_INIT(c, children.busy);
c->devinfo = NULL;
c->feeder = NULL;
c->latency = -1;
c->timeout = 1;
ret = ENOMEM;
b = sndbuf_create(c->dev, c->name, "primary", c);
if (b == NULL)
goto out;
bs = sndbuf_create(c->dev, c->name, "secondary", c);
if (bs == NULL)
goto out;
CHN_LOCK(c);
ret = EINVAL;
fc = feeder_getclass(NULL);
if (fc == NULL)
goto out;
if (chn_addfeeder(c, fc, NULL))
goto out;
/*
* XXX - sndbuf_setup() & sndbuf_resize() expect to be called
* with the channel unlocked because they are also called
* from driver methods that don't know about locking
*/
CHN_UNLOCK(c);
sndbuf_setup(bs, NULL, 0);
CHN_LOCK(c);
c->bufhard = b;
c->bufsoft = bs;
c->flags = 0;
c->feederflags = 0;
c->sm = NULL;
c->format = SND_FORMAT(AFMT_U8, 1, 0);
c->speed = DSP_DEFAULT_SPEED;
c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0);
c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
for (i = 0; i < SND_CHN_T_MAX; i++) {
c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER;
}
c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER;
c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm;
chn_vpc_reset(c, SND_VOL_C_PCM, 1);
ret = ENODEV;
CHN_UNLOCK(c); /* XXX - Unlock for CHANNEL_INIT() malloc() call */
c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction);
CHN_LOCK(c);
if (c->devinfo == NULL)
goto out;
ret = ENOMEM;
if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0))
goto out;
ret = 0;
c->direction = direction;
sndbuf_setfmt(b, c->format);
sndbuf_setspd(b, c->speed);
sndbuf_setfmt(bs, c->format);
sndbuf_setspd(bs, c->speed);
/**
* @todo Should this be moved somewhere else? The primary buffer
* is allocated by the driver or via DMA map setup, and tmpbuf
* seems to only come into existence in sndbuf_resize().
*/
if (c->direction == PCMDIR_PLAY) {
bs->sl = sndbuf_getmaxsize(bs);
bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_NOWAIT);
if (bs->shadbuf == NULL) {
ret = ENOMEM;
goto out;
}
}
out:
CHN_UNLOCK(c);
if (ret) {
if (c->devinfo) {
if (CHANNEL_FREE(c->methods, c->devinfo))
sndbuf_free(b);
}
if (bs)
sndbuf_destroy(bs);
if (b)
sndbuf_destroy(b);
CHN_LOCK(c);
c->flags |= CHN_F_DEAD;
chn_lockdestroy(c);
return ret;
}
return 0;
}
int
chn_kill(struct pcm_channel *c)
{
struct snd_dbuf *b = c->bufhard;
struct snd_dbuf *bs = c->bufsoft;
if (CHN_STARTED(c)) {
CHN_LOCK(c);
chn_trigger(c, PCMTRIG_ABORT);
CHN_UNLOCK(c);
}
while (chn_removefeeder(c) == 0)
;
if (CHANNEL_FREE(c->methods, c->devinfo))
sndbuf_free(b);
sndbuf_destroy(bs);
sndbuf_destroy(b);
CHN_LOCK(c);
c->flags |= CHN_F_DEAD;
chn_lockdestroy(c);
return (0);
}
/* XXX Obsolete. Use *_matrix() variant instead. */
int
chn_setvolume(struct pcm_channel *c, int left, int right)
{
int ret;
ret = chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FL, left);
ret |= chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FR,
right) << 8;
return (ret);
}
int
chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right,
int center)
{
int i, ret;
ret = 0;
for (i = 0; i < SND_CHN_T_MAX; i++) {
if ((1 << i) & SND_CHN_LEFT_MASK)
ret |= chn_setvolume_matrix(c, vc, i, left);
else if ((1 << i) & SND_CHN_RIGHT_MASK)
ret |= chn_setvolume_matrix(c, vc, i, right) << 8;
else
ret |= chn_setvolume_matrix(c, vc, i, center) << 16;
}
return (ret);
}
int
chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val)
{
int i;
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
(vc == SND_VOL_C_MASTER || (vc & 1)) &&
(vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN &&
vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB ||
(val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)),
("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d",
__func__, c, vc, vt, val));
CHN_LOCKASSERT(c);
if (val < 0)
val = 0;
if (val > 100)
val = 100;
c->volume[vc][vt] = val;
/*
* Do relative calculation here and store it into class + 1
* to ease the job of feeder_volume.
*/
if (vc == SND_VOL_C_MASTER) {
for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END;
vc += SND_VOL_C_STEP)
c->volume[SND_VOL_C_VAL(vc)][vt] =
SND_VOL_CALC_VAL(c->volume, vc, vt);
} else if (vc & 1) {
if (vt == SND_CHN_T_VOL_0DB)
for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END;
i += SND_CHN_T_STEP) {
c->volume[SND_VOL_C_VAL(vc)][i] =
SND_VOL_CALC_VAL(c->volume, vc, i);
}
else
c->volume[SND_VOL_C_VAL(vc)][vt] =
SND_VOL_CALC_VAL(c->volume, vc, vt);
}
return (val);
}
int
chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt)
{
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
(vt == SND_CHN_T_VOL_0DB ||
(vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)),
("%s(): invalid volume matrix c=%p vc=%d vt=%d",
__func__, c, vc, vt));
CHN_LOCKASSERT(c);
return (c->volume[vc][vt]);
}
struct pcmchan_matrix *
chn_getmatrix(struct pcm_channel *c)
{
KASSERT(c != NULL, ("%s(): NULL channel", __func__));
CHN_LOCKASSERT(c);
if (!(c->format & AFMT_CONVERTIBLE))
return (NULL);
return (&c->matrix);
}
int
chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m)
{
KASSERT(c != NULL && m != NULL,
("%s(): NULL channel or matrix", __func__));
CHN_LOCKASSERT(c);
if (!(c->format & AFMT_CONVERTIBLE))
return (EINVAL);
c->matrix = *m;
c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext)));
}
/*
* XXX chn_oss_* exists for the sake of compatibility.
*/
int
chn_oss_getorder(struct pcm_channel *c, unsigned long long *map)
{
KASSERT(c != NULL && map != NULL,
("%s(): NULL channel or map", __func__));
CHN_LOCKASSERT(c);
if (!(c->format & AFMT_CONVERTIBLE))
return (EINVAL);
return (feeder_matrix_oss_get_channel_order(&c->matrix, map));
}
int
chn_oss_setorder(struct pcm_channel *c, unsigned long long *map)
{
struct pcmchan_matrix m;
int ret;
KASSERT(c != NULL && map != NULL,
("%s(): NULL channel or map", __func__));
CHN_LOCKASSERT(c);
if (!(c->format & AFMT_CONVERTIBLE))
return (EINVAL);
m = c->matrix;
ret = feeder_matrix_oss_set_channel_order(&m, map);
if (ret != 0)
return (ret);
return (chn_setmatrix(c, &m));
}
#define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR)
#define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR)
#define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF)
#define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR)
int
chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask)
{
struct pcmchan_matrix *m;
struct pcmchan_caps *caps;
uint32_t i, format;
KASSERT(c != NULL && retmask != NULL,
("%s(): NULL channel or retmask", __func__));
CHN_LOCKASSERT(c);
caps = chn_getcaps(c);
if (caps == NULL || caps->fmtlist == NULL)
return (ENODEV);
for (i = 0; caps->fmtlist[i] != 0; i++) {
format = caps->fmtlist[i];
if (!(format & AFMT_CONVERTIBLE)) {
*retmask |= DSP_BIND_SPDIF;
continue;
}
m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format);
if (m == NULL)
continue;
if (m->mask & SND_CHN_OSS_FRONT)
*retmask |= DSP_BIND_FRONT;
if (m->mask & SND_CHN_OSS_SURR)
*retmask |= DSP_BIND_SURR;
if (m->mask & SND_CHN_OSS_CENTER_LFE)
*retmask |= DSP_BIND_CENTER_LFE;
if (m->mask & SND_CHN_OSS_REAR)
*retmask |= DSP_BIND_REAR;
}
/* report software-supported binding mask */
if (!CHN_BITPERFECT(c) && report_soft_matrix)
*retmask |= DSP_BIND_FRONT | DSP_BIND_SURR |
DSP_BIND_CENTER_LFE | DSP_BIND_REAR;
return (0);
}
void
chn_vpc_reset(struct pcm_channel *c, int vc, int force)
{
int i;
KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END,
("%s(): invalid reset c=%p vc=%d", __func__, c, vc));
CHN_LOCKASSERT(c);
if (force == 0 && chn_vpc_autoreset == 0)
return;
for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP)
CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]);
}
static u_int32_t
round_pow2(u_int32_t v)
{
u_int32_t ret;
if (v < 2)
v = 2;
ret = 0;
while (v >> ret)
ret++;
ret = 1 << (ret - 1);
while (ret < v)
ret <<= 1;
return ret;
}
static u_int32_t
round_blksz(u_int32_t v, int round)
{
u_int32_t ret, tmp;
if (round < 1)
round = 1;
ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1);
if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2))
ret >>= 1;
tmp = ret - (ret % round);
while (tmp < 16 || tmp < round) {
ret <<= 1;
tmp = ret - (ret % round);
}
return ret;
}
/*
* 4Front call it DSP Policy, while we call it "Latency Profile". The idea
* is to keep 2nd buffer short so that it doesn't cause long queue during
* buffer transfer.
*
* Latency reference table for 48khz stereo 16bit: (PLAY)
*
* +---------+------------+-----------+------------+
* | Latency | Blockcount | Blocksize | Buffersize |
* +---------+------------+-----------+------------+
* | 0 | 2 | 64 | 128 |
* +---------+------------+-----------+------------+
* | 1 | 4 | 128 | 512 |
* +---------+------------+-----------+------------+
* | 2 | 8 | 512 | 4096 |
* +---------+------------+-----------+------------+
* | 3 | 16 | 512 | 8192 |
* +---------+------------+-----------+------------+
* | 4 | 32 | 512 | 16384 |
* +---------+------------+-----------+------------+
* | 5 | 32 | 1024 | 32768 |
* +---------+------------+-----------+------------+
* | 6 | 16 | 2048 | 32768 |
* +---------+------------+-----------+------------+
* | 7 | 8 | 4096 | 32768 |
* +---------+------------+-----------+------------+
* | 8 | 4 | 8192 | 32768 |
* +---------+------------+-----------+------------+
* | 9 | 2 | 16384 | 32768 |
* +---------+------------+-----------+------------+
* | 10 | 2 | 32768 | 65536 |
* +---------+------------+-----------+------------+
*
* Recording need a different reference table. All we care is
* gobbling up everything within reasonable buffering threshold.
*
* Latency reference table for 48khz stereo 16bit: (REC)
*
* +---------+------------+-----------+------------+
* | Latency | Blockcount | Blocksize | Buffersize |
* +---------+------------+-----------+------------+
* | 0 | 512 | 32 | 16384 |
* +---------+------------+-----------+------------+
* | 1 | 256 | 64 | 16384 |
* +---------+------------+-----------+------------+
* | 2 | 128 | 128 | 16384 |
* +---------+------------+-----------+------------+
* | 3 | 64 | 256 | 16384 |
* +---------+------------+-----------+------------+
* | 4 | 32 | 512 | 16384 |
* +---------+------------+-----------+------------+
* | 5 | 32 | 1024 | 32768 |
* +---------+------------+-----------+------------+
* | 6 | 16 | 2048 | 32768 |
* +---------+------------+-----------+------------+
* | 7 | 8 | 4096 | 32768 |
* +---------+------------+-----------+------------+
* | 8 | 4 | 8192 | 32768 |
* +---------+------------+-----------+------------+
* | 9 | 2 | 16384 | 32768 |
* +---------+------------+-----------+------------+
* | 10 | 2 | 32768 | 65536 |
* +---------+------------+-----------+------------+
*
* Calculations for other data rate are entirely based on these reference
* tables. For normal operation, Latency 5 seems give the best, well
* balanced performance for typical workload. Anything below 5 will
* eat up CPU to keep up with increasing context switches because of
* shorter buffer space and usually require the application to handle it
* aggresively through possibly real time programming technique.
*
*/
#define CHN_LATENCY_PBLKCNT_REF \
{{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \
{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}}
#define CHN_LATENCY_PBUFSZ_REF \
{{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \
{11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}}
#define CHN_LATENCY_RBLKCNT_REF \
{{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \
{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}}
#define CHN_LATENCY_RBUFSZ_REF \
{{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \
{15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}}
#define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */
static int
chn_calclatency(int dir, int latency, int bps, u_int32_t datarate,
u_int32_t max, int *rblksz, int *rblkcnt)
{
static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
CHN_LATENCY_PBLKCNT_REF;
static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
CHN_LATENCY_PBUFSZ_REF;
static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
CHN_LATENCY_RBLKCNT_REF;
static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
CHN_LATENCY_RBUFSZ_REF;
u_int32_t bufsz;
int lprofile, blksz, blkcnt;
if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX ||
bps < 1 || datarate < 1 ||
!(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) {
if (rblksz != NULL)
*rblksz = CHN_2NDBUFMAXSIZE >> 1;
if (rblkcnt != NULL)
*rblkcnt = 2;
printf("%s(): FAILED dir=%d latency=%d bps=%d "
"datarate=%u max=%u\n",
__func__, dir, latency, bps, datarate, max);
return CHN_2NDBUFMAXSIZE;
}
lprofile = chn_latency_profile;
if (dir == PCMDIR_PLAY) {
blkcnt = pblkcnts[lprofile][latency];
bufsz = pbufszs[lprofile][latency];
} else {
blkcnt = rblkcnts[lprofile][latency];
bufsz = rbufszs[lprofile][latency];
}
bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF,
datarate));
if (bufsz > max)
bufsz = max;
blksz = round_blksz(bufsz >> blkcnt, bps);
if (rblksz != NULL)
*rblksz = blksz;
if (rblkcnt != NULL)
*rblkcnt = 1 << blkcnt;
return blksz << blkcnt;
}
static int
chn_resizebuf(struct pcm_channel *c, int latency,
int blkcnt, int blksz)
{
struct snd_dbuf *b, *bs, *pb;
int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt;
int ret;
CHN_LOCKASSERT(c);
if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) ||
!(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC))
return EINVAL;
if (latency == -1) {
c->latency = -1;
latency = chn_latency;
} else if (latency == -2) {
latency = c->latency;
if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX)
latency = chn_latency;
} else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX)
return EINVAL;
else {
c->latency = latency;
}
bs = c->bufsoft;
b = c->bufhard;
if (!(blksz == 0 || blkcnt == -1) &&
(blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 ||
(blksz * blkcnt) > CHN_2NDBUFMAXSIZE))
return EINVAL;
chn_calclatency(c->direction, latency, sndbuf_getalign(bs),
sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE,
&sblksz, &sblkcnt);
if (blksz == 0 || blkcnt == -1) {
if (blkcnt == -1)
c->flags &= ~CHN_F_HAS_SIZE;
if (c->flags & CHN_F_HAS_SIZE) {
blksz = sndbuf_getblksz(bs);
blkcnt = sndbuf_getblkcnt(bs);
}
} else
c->flags |= CHN_F_HAS_SIZE;
if (c->flags & CHN_F_HAS_SIZE) {
/*
* The application has requested their own blksz/blkcnt.
* Just obey with it, and let them toast alone. We can
* clamp it to the nearest latency profile, but that would
* defeat the purpose of having custom control. The least
* we can do is round it to the nearest ^2 and align it.
*/
sblksz = round_blksz(blksz, sndbuf_getalign(bs));
sblkcnt = round_pow2(blkcnt);
}
if (c->parentchannel != NULL) {
pb = c->parentchannel->bufsoft;
CHN_UNLOCK(c);
CHN_LOCK(c->parentchannel);
chn_notify(c->parentchannel, CHN_N_BLOCKSIZE);
CHN_UNLOCK(c->parentchannel);
CHN_LOCK(c);
if (c->direction == PCMDIR_PLAY) {
limit = (pb != NULL) ?
sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0;
} else {
limit = (pb != NULL) ?
sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0;
}
} else {
hblkcnt = 2;
if (c->flags & CHN_F_HAS_SIZE) {
hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b),
sndbuf_getalign(b));
hblkcnt = round_pow2(sndbuf_getblkcnt(bs));
} else
chn_calclatency(c->direction, latency,
sndbuf_getalign(b),
sndbuf_getalign(b) * sndbuf_getspd(b),
CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt);
if ((hblksz << 1) > sndbuf_getmaxsize(b))
hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1,
sndbuf_getalign(b));
while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) {
if (hblkcnt < 4)
hblksz >>= 1;
else
hblkcnt >>= 1;
}
hblksz -= hblksz % sndbuf_getalign(b);
#if 0
hblksz = sndbuf_getmaxsize(b) >> 1;
hblksz -= hblksz % sndbuf_getalign(b);
hblkcnt = 2;
#endif
CHN_UNLOCK(c);
if (chn_usefrags == 0 ||
CHANNEL_SETFRAGMENTS(c->methods, c->devinfo,
hblksz, hblkcnt) != 0)
sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods,
c->devinfo, hblksz));
CHN_LOCK(c);
if (!CHN_EMPTY(c, children)) {
nsblksz = round_blksz(
sndbuf_xbytes(sndbuf_getblksz(b), b, bs),
sndbuf_getalign(bs));
nsblkcnt = sndbuf_getblkcnt(b);
if (c->direction == PCMDIR_PLAY) {
do {
nsblkcnt--;
} while (nsblkcnt >= 2 &&
nsblksz * nsblkcnt >= sblksz * sblkcnt);
nsblkcnt++;
}
sblksz = nsblksz;
sblkcnt = nsblkcnt;
limit = 0;
} else
limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2;
}
if (limit > CHN_2NDBUFMAXSIZE)
limit = CHN_2NDBUFMAXSIZE;
#if 0
while (limit > 0 && (sblksz * sblkcnt) > limit) {
if (sblkcnt < 4)
break;
sblkcnt >>= 1;
}
#endif
while ((sblksz * sblkcnt) < limit)
sblkcnt <<= 1;
while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) {
if (sblkcnt < 4)
sblksz >>= 1;
else
sblkcnt >>= 1;
}
sblksz -= sblksz % sndbuf_getalign(bs);
if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz ||
sndbuf_getsize(bs) != (sblkcnt * sblksz)) {
ret = sndbuf_remalloc(bs, sblkcnt, sblksz);
if (ret != 0) {
device_printf(c->dev, "%s(): Failed: %d %d\n",
__func__, sblkcnt, sblksz);
return ret;
}
}
/*
* Interrupt timeout
*/
c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) /
((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs));
if (c->parentchannel != NULL)
c->timeout = min(c->timeout, c->parentchannel->timeout);
if (c->timeout < 1)
c->timeout = 1;
/*
* OSSv4 docs: "By default OSS will set the low water level equal
* to the fragment size which is optimal in most cases."
*/
c->lw = sndbuf_getblksz(bs);
chn_resetbuf(c);
if (snd_verbose > 3)
device_printf(c->dev, "%s(): %s (%s) timeout=%u "
"b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n",
__func__, CHN_DIRSTR(c),
(c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware",
c->timeout,
sndbuf_getsize(b), sndbuf_getblksz(b),
sndbuf_getblkcnt(b),
sndbuf_getsize(bs), sndbuf_getblksz(bs),
sndbuf_getblkcnt(bs), limit);
return 0;
}
int
chn_setlatency(struct pcm_channel *c, int latency)
{
CHN_LOCKASSERT(c);
/* Destroy blksz/blkcnt, enforce latency profile. */
return chn_resizebuf(c, latency, -1, 0);
}
int
chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz)
{
CHN_LOCKASSERT(c);
/* Destroy latency profile, enforce blksz/blkcnt */
return chn_resizebuf(c, -1, blkcnt, blksz);
}
int
chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed)
{
struct pcmchan_caps *caps;
uint32_t hwspeed, delta;
int ret;
CHN_LOCKASSERT(c);
if (speed < 1 || format == 0 || CHN_STARTED(c))
return (EINVAL);
c->format = format;
c->speed = speed;
caps = chn_getcaps(c);
hwspeed = speed;
RANGE(hwspeed, caps->minspeed, caps->maxspeed);
sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo,
hwspeed));
hwspeed = sndbuf_getspd(c->bufhard);
delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed);
if (delta <= feeder_rate_round)
c->speed = hwspeed;
ret = feeder_chain(c);
if (ret == 0)
ret = CHANNEL_SETFORMAT(c->methods, c->devinfo,
sndbuf_getfmt(c->bufhard));
if (ret == 0)
ret = chn_resizebuf(c, -2, 0, 0);
return (ret);
}
int
chn_setspeed(struct pcm_channel *c, uint32_t speed)
{
uint32_t oldformat, oldspeed, format;
int ret;
#if 0
/* XXX force 48k */
if (c->format & AFMT_PASSTHROUGH)
speed = AFMT_PASSTHROUGH_RATE;
#endif
oldformat = c->format;
oldspeed = c->speed;
format = oldformat;
ret = chn_setparam(c, format, speed);
if (ret != 0) {
if (snd_verbose > 3)
device_printf(c->dev,
"%s(): Setting speed %d failed, "
"falling back to %d\n",
__func__, speed, oldspeed);
chn_setparam(c, c->format, oldspeed);
}
return (ret);
}
int
chn_setformat(struct pcm_channel *c, uint32_t format)
{
uint32_t oldformat, oldspeed, speed;
int ret;
/* XXX force stereo */
if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) {
format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL,
AFMT_PASSTHROUGH_EXTCHANNEL);
}
oldformat = c->format;
oldspeed = c->speed;
speed = oldspeed;
ret = chn_setparam(c, format, speed);
if (ret != 0) {
if (snd_verbose > 3)
device_printf(c->dev,
"%s(): Format change 0x%08x failed, "
"falling back to 0x%08x\n",
__func__, format, oldformat);
chn_setparam(c, oldformat, oldspeed);
}
return (ret);
}
void
chn_syncstate(struct pcm_channel *c)
{
struct snddev_info *d;
struct snd_mixer *m;
d = (c != NULL) ? c->parentsnddev : NULL;
m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 :
NULL;
if (d == NULL || m == NULL)
return;
CHN_LOCKASSERT(c);
if (c->feederflags & (1 << FEEDER_VOLUME)) {
uint32_t parent;
int vol, pvol, left, right, center;
if (c->direction == PCMDIR_PLAY &&
(d->flags & SD_F_SOFTPCMVOL)) {
/* CHN_UNLOCK(c); */
vol = mix_get(m, SOUND_MIXER_PCM);
parent = mix_getparent(m, SOUND_MIXER_PCM);
if (parent != SOUND_MIXER_NONE)
pvol = mix_get(m, parent);
else
pvol = 100 | (100 << 8);
/* CHN_LOCK(c); */
} else {
vol = 100 | (100 << 8);
pvol = vol;
}
if (vol == -1) {
device_printf(c->dev,
"Soft PCM Volume: Failed to read pcm "
"default value\n");
vol = 100 | (100 << 8);
}
if (pvol == -1) {
device_printf(c->dev,
"Soft PCM Volume: Failed to read parent "
"default value\n");
pvol = 100 | (100 << 8);
}
left = ((vol & 0x7f) * (pvol & 0x7f)) / 100;
right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100;
center = (left + right) >> 1;
chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center);
}
if (c->feederflags & (1 << FEEDER_EQ)) {
struct pcm_feeder *f;
int treble, bass, state;
/* CHN_UNLOCK(c); */
treble = mix_get(m, SOUND_MIXER_TREBLE);
bass = mix_get(m, SOUND_MIXER_BASS);
/* CHN_LOCK(c); */
if (treble == -1)
treble = 50;
else
treble = ((treble & 0x7f) +
((treble >> 8) & 0x7f)) >> 1;
if (bass == -1)
bass = 50;
else
bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1;
f = chn_findfeeder(c, FEEDER_EQ);
if (f != NULL) {
if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0)
device_printf(c->dev,
"EQ: Failed to set treble -- %d\n",
treble);
if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0)
device_printf(c->dev,
"EQ: Failed to set bass -- %d\n",
bass);
if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0)
device_printf(c->dev,
"EQ: Failed to set preamp -- %d\n",
d->eqpreamp);
if (d->flags & SD_F_EQ_BYPASSED)
state = FEEDEQ_BYPASS;
else if (d->flags & SD_F_EQ_ENABLED)
state = FEEDEQ_ENABLE;
else
state = FEEDEQ_DISABLE;
if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0)
device_printf(c->dev,
"EQ: Failed to set state -- %d\n", state);
}
}
}
int
chn_trigger(struct pcm_channel *c, int go)
{
#ifdef DEV_ISA
struct snd_dbuf *b = c->bufhard;
#endif
struct snddev_info *d = c->parentsnddev;
int ret;
CHN_LOCKASSERT(c);
#ifdef DEV_ISA
if (SND_DMA(b) && (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD))
sndbuf_dmabounce(b);
#endif
if (!PCMTRIG_COMMON(go))
return (CHANNEL_TRIGGER(c->methods, c->devinfo, go));
if (go == c->trigger)
return (0);
ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
if (ret != 0)
return (ret);
switch (go) {
case PCMTRIG_START:
if (snd_verbose > 3)
device_printf(c->dev,
"%s() %s: calling go=0x%08x , "
"prev=0x%08x\n", __func__, c->name, go,
c->trigger);
if (c->trigger != PCMTRIG_START) {
c->trigger = go;
CHN_UNLOCK(c);
PCM_LOCK(d);
CHN_INSERT_HEAD(d, c, channels.pcm.busy);
PCM_UNLOCK(d);
CHN_LOCK(c);
chn_syncstate(c);
}
break;
case PCMTRIG_STOP:
case PCMTRIG_ABORT:
if (snd_verbose > 3)
device_printf(c->dev,
"%s() %s: calling go=0x%08x , "
"prev=0x%08x\n", __func__, c->name, go,
c->trigger);
if (c->trigger == PCMTRIG_START) {
c->trigger = go;
CHN_UNLOCK(c);
PCM_LOCK(d);
CHN_REMOVE(d, c, channels.pcm.busy);
PCM_UNLOCK(d);
CHN_LOCK(c);
}
break;
default:
break;
}
return (0);
}
/**
* @brief Queries sound driver for sample-aligned hardware buffer pointer index
*
* This function obtains the hardware pointer location, then aligns it to
* the current bytes-per-sample value before returning. (E.g., a channel
* running in 16 bit stereo mode would require 4 bytes per sample, so a
* hwptr value ranging from 32-35 would be returned as 32.)
*
* @param c PCM channel context
* @returns sample-aligned hardware buffer pointer index
*/
int
chn_getptr(struct pcm_channel *c)
{
int hwptr;
CHN_LOCKASSERT(c);
hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
return (hwptr - (hwptr % sndbuf_getalign(c->bufhard)));
}
struct pcmchan_caps *
chn_getcaps(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
return CHANNEL_GETCAPS(c->methods, c->devinfo);
}
u_int32_t
chn_getformats(struct pcm_channel *c)
{
u_int32_t *fmtlist, fmts;
int i;
fmtlist = chn_getcaps(c)->fmtlist;
fmts = 0;
for (i = 0; fmtlist[i]; i++)
fmts |= fmtlist[i];
/* report software-supported formats */
if (!CHN_BITPERFECT(c) && report_soft_formats)
fmts |= AFMT_CONVERTIBLE;
return (AFMT_ENCODING(fmts));
}
int
chn_notify(struct pcm_channel *c, u_int32_t flags)
{
struct pcm_channel *ch;
struct pcmchan_caps *caps;
uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate;
uint32_t vpflags;
int dirty, err, run, nrun;
CHN_LOCKASSERT(c);
if (CHN_EMPTY(c, children))
return (ENODEV);
err = 0;
/*
* If the hwchan is running, we can't change its rate, format or
* blocksize
*/
run = (CHN_STARTED(c)) ? 1 : 0;
if (run)
flags &= CHN_N_VOLUME | CHN_N_TRIGGER;
if (flags & CHN_N_RATE) {
/*
* XXX I'll make good use of this someday.
* However this is currently being superseded by
* the availability of CHN_F_VCHAN_DYNAMIC.
*/
}
if (flags & CHN_N_FORMAT) {
/*
* XXX I'll make good use of this someday.
* However this is currently being superseded by
* the availability of CHN_F_VCHAN_DYNAMIC.
*/
}
if (flags & CHN_N_VOLUME) {
/*
* XXX I'll make good use of this someday, though
* soft volume control is currently pretty much
* integrated.
*/
}
if (flags & CHN_N_BLOCKSIZE) {
/*
* Set to default latency profile
*/
chn_setlatency(c, chn_latency);
}
if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) {
nrun = CHN_EMPTY(c, children.busy) ? 0 : 1;
if (nrun && !run)
err = chn_start(c, 1);
if (!nrun && run)
chn_abort(c);
flags &= ~CHN_N_TRIGGER;
}
if (flags & CHN_N_TRIGGER) {
if (c->direction == PCMDIR_PLAY) {
vchanformat = &c->parentsnddev->pvchanformat;
vchanrate = &c->parentsnddev->pvchanrate;
} else {
vchanformat = &c->parentsnddev->rvchanformat;
vchanrate = &c->parentsnddev->rvchanrate;
}
/* Dynamic Virtual Channel */
if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) {
bestformat = *vchanformat;
bestspeed = *vchanrate;
} else {
bestformat = 0;
bestspeed = 0;
}
besthwformat = 0;
nrun = 0;
caps = chn_getcaps(c);
dirty = 0;
vpflags = 0;
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
if ((ch->format & AFMT_PASSTHROUGH) &&
snd_fmtvalid(ch->format, caps->fmtlist)) {
bestformat = ch->format;
bestspeed = ch->speed;
CHN_UNLOCK(ch);
vpflags = CHN_F_PASSTHROUGH;
nrun++;
break;
}
if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) {
if (c->flags & CHN_F_VCHAN_ADAPTIVE) {
bestspeed = ch->speed;
RANGE(bestspeed, caps->minspeed,
caps->maxspeed);
besthwformat = snd_fmtbest(ch->format,
caps->fmtlist);
if (besthwformat != 0)
bestformat = besthwformat;
}
CHN_UNLOCK(ch);
vpflags = CHN_F_EXCLUSIVE;
nrun++;
continue;
}
if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) ||
vpflags != 0) {
CHN_UNLOCK(ch);
nrun++;
continue;
}
if (ch->speed > bestspeed) {
bestspeed = ch->speed;
RANGE(bestspeed, caps->minspeed,
caps->maxspeed);
}
besthwformat = snd_fmtbest(ch->format, caps->fmtlist);
if (!(besthwformat & AFMT_VCHAN)) {
CHN_UNLOCK(ch);
nrun++;
continue;
}
if (AFMT_CHANNEL(besthwformat) >
AFMT_CHANNEL(bestformat))
bestformat = besthwformat;
else if (AFMT_CHANNEL(besthwformat) ==
AFMT_CHANNEL(bestformat) &&
AFMT_BIT(besthwformat) > AFMT_BIT(bestformat))
bestformat = besthwformat;
CHN_UNLOCK(ch);
nrun++;
}
if (bestformat == 0)
bestformat = c->format;
if (bestspeed == 0)
bestspeed = c->speed;
if (bestformat != c->format || bestspeed != c->speed)
dirty = 1;
c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
c->flags |= vpflags;
if (nrun && !run) {
if (dirty) {
bestspeed = CHANNEL_SETSPEED(c->methods,
c->devinfo, bestspeed);
err = chn_reset(c, bestformat, bestspeed);
}
if (err == 0 && dirty) {
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
if (VCHAN_SYNC_REQUIRED(ch))
vchan_sync(ch);
CHN_UNLOCK(ch);
}
}
if (err == 0) {
if (dirty)
c->flags |= CHN_F_DIRTY;
err = chn_start(c, 1);
}
}
if (nrun && run && dirty) {
chn_abort(c);
bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo,
bestspeed);
err = chn_reset(c, bestformat, bestspeed);
if (err == 0) {
CHN_FOREACH(ch, c, children.busy) {
CHN_LOCK(ch);
if (VCHAN_SYNC_REQUIRED(ch))
vchan_sync(ch);
CHN_UNLOCK(ch);
}
}
if (err == 0) {
c->flags |= CHN_F_DIRTY;
err = chn_start(c, 1);
}
}
if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) &&
(bestformat & AFMT_VCHAN)) {
*vchanformat = bestformat;
*vchanrate = bestspeed;
}
if (!nrun && run) {
c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
bestformat = *vchanformat;
bestspeed = *vchanrate;
chn_abort(c);
if (c->format != bestformat || c->speed != bestspeed)
chn_reset(c, bestformat, bestspeed);
}
}
return (err);
}
/**
* @brief Fetch array of supported discrete sample rates
*
* Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for
* detailed information.
*
* @note If the operation isn't supported, this function will just return 0
* (no rates in the array), and *rates will be set to NULL. Callers
* should examine rates @b only if this function returns non-zero.
*
* @param c pcm channel to examine
* @param rates pointer to array of integers; rate table will be recorded here
*
* @return number of rates in the array pointed to be @c rates
*/
int
chn_getrates(struct pcm_channel *c, int **rates)
{
KASSERT(rates != NULL, ("rates is null"));
CHN_LOCKASSERT(c);
return CHANNEL_GETRATES(c->methods, c->devinfo, rates);
}
/**
* @brief Remove channel from a sync group, if there is one.
*
* This function is initially intended for the following conditions:
* - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl)
* - Closing a device. (A channel can't be destroyed if it's still in use.)
*
* @note Before calling this function, the syncgroup list mutex must be
* held. (Consider pcm_channel::sm protected by the SG list mutex
* whether @c c is locked or not.)
*
* @param c channel device to be started or closed
* @returns If this channel was the only member of a group, the group ID
* is returned to the caller so that the caller can release it
* via free_unr() after giving up the syncgroup lock. Else it
* returns 0.
*/
int
chn_syncdestroy(struct pcm_channel *c)
{
struct pcmchan_syncmember *sm;
struct pcmchan_syncgroup *sg;
int sg_id;
sg_id = 0;
PCM_SG_LOCKASSERT(MA_OWNED);
if (c->sm != NULL) {
sm = c->sm;
sg = sm->parent;
c->sm = NULL;
KASSERT(sg != NULL, ("syncmember has null parent"));
SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link);
free(sm, M_DEVBUF);
if (SLIST_EMPTY(&sg->members)) {
SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
sg_id = sg->id;
free(sg, M_DEVBUF);
}
}
return sg_id;
}
#ifdef OSSV4_EXPERIMENT
int
chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak)
{
CHN_LOCKASSERT(c);
return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak);
}
#endif
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