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freebsd-skq/sys/dev/sound/pcm/dsp.c
ariff e3faadaafe Sound Mega-commit. Expect further cleanup until code freeze. 
For a slightly thorough explaination, please refer to
	[1] http://people.freebsd.org/~ariff/SOUND_4.TXT.html .

Summary of changes includes:

1 Volume Per-Channel (vpc).  Provides private / standalone volume control
  unique per-stream pcm channel without touching master volume / pcm.
  Applications can directly use SNDCTL_DSP_[GET|SET][PLAY|REC]VOL, or for
  backwards compatibility, SOUND_MIXER_PCM through the opened dsp device
  instead of /dev/mixer.  Special "bypass" mode is enabled through
  /dev/mixer which will automatically detect if the adjustment is made
  through /dev/mixer and forward its request to this private volume
  controller.  Changes to this volume object will not interfere with
  other channels.

  Requirements:
    - SNDCTL_DSP_[GET|SET][PLAY|REC]_VOL are newer ioctls (OSSv4) which
      require specific application modifications (preferred).
    - No modifications required for using bypass mode, so applications
      like mplayer or xmms should work out of the box.

  Kernel hints:
    - hint.pcm.%d.vpc (0 = disable vpc).

  Kernel sysctls:
    - hw.snd.vpc_mixer_bypass (default: 1).  Enable or disable /dev/mixer
      bypass mode.
    - hw.snd.vpc_autoreset (default: 1).  By default, closing/opening
      /dev/dsp will reset the volume back to 0 db gain/attenuation.
      Setting this to 0 will preserve its settings across device
      closing/opening.
    - hw.snd.vpc_reset (default: 0).  Panic/reset button to reset all
      volume settings back to 0 db.
    - hw.snd.vpc_0db (default: 45).  0 db relative to linear mixer value.

2 High quality fixed-point Bandlimited SINC sampling rate converter,
  based on Julius O'Smith's Digital Audio Resampling -
  http://ccrma.stanford.edu/~jos/resample/.  It includes a filter design
  script written in awk (the clumsiest joke I've ever written)
    - 100% 32bit fixed-point, 64bit accumulator.
    - Possibly among the fastest (if not fastest) of its kind.
    - Resampling quality is tunable, either runtime or during kernel
      compilation (FEEDER_RATE_PRESETS).
    - Quality can be further customized during kernel compilation by
      defining FEEDER_RATE_PRESETS in /etc/make.conf.

  Kernel sysctls:
    - hw.snd.feeder_rate_quality.
      0 - Zero-order Hold (ZOH).  Fastest, bad quality.
      1 - Linear Interpolation (LINEAR).  Slightly slower than ZOH,
          better quality but still does not eliminate aliasing.
      2 - (and above) - Sinc Interpolation(SINC).  Best quality.  SINC
          quality always start from 2 and above.

  Rough quality comparisons:
    - http://people.freebsd.org/~ariff/z_comparison/

3 Bit-perfect mode.  Bypasses all feeder/dsp effects.  Pure sound will be
  directly fed into the hardware.

4 Parametric (compile time) Software Equalizer (Bass/Treble mixer). Can
  be customized by defining FEEDER_EQ_PRESETS in /etc/make.conf.

5 Transparent/Adaptive Virtual Channel. Now you don't have to disable
  vchans in order to make digital format pass through.  It also makes
  vchans more dynamic by choosing a better format/rate among all the
  concurrent streams, which means that dev.pcm.X.play.vchanformat/rate
  becomes sort of optional.

6 Exclusive Stream, with special open() mode O_EXCL.  This will "mute"
  other concurrent vchan streams and only allow a single channel with
  O_EXCL set to keep producing sound.

Other Changes:
    * most feeder_* stuffs are compilable in userland. Let's not
      speculate whether we should go all out for it (save that for
      FreeBSD 16.0-RELEASE).
    * kobj signature fixups, thanks to Andriy Gapon <avg@freebsd.org>
    * pull out channel mixing logic out of vchan.c and create its own
      feeder_mixer for world justice.
    * various refactoring here and there, for good or bad.
    * activation of few more OSSv4 ioctls() (see [1] above).
    * opt_snd.h for possible compile time configuration:
      (mostly for debugging purposes, don't try these at home)
        SND_DEBUG
        SND_DIAGNOSTIC
        SND_FEEDER_MULTIFORMAT
        SND_FEEDER_FULL_MULTIFORMAT
        SND_FEEDER_RATE_HP
        SND_PCM_64
        SND_OLDSTEREO

Manual page updates are on the way.

Tested by:	joel, Olivier SMEDTS <olivier at gid0 d org>, too many
          	unsung / unnamed heroes.
2009-06-07 19:12:08 +00:00

3341 lines
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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>
* 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.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <sys/ctype.h>
#include <sys/sysent.h>
SND_DECLARE_FILE("$FreeBSD$");
static int dsp_mmap_allow_prot_exec = 0;
SYSCTL_INT(_hw_snd, OID_AUTO, compat_linux_mmap, CTLFLAG_RW,
&dsp_mmap_allow_prot_exec, 0,
"linux mmap compatibility (-1=force disable 0=auto 1=force enable)");
struct dsp_cdevinfo {
struct pcm_channel *rdch, *wrch;
struct pcm_channel *volch;
int busy, simplex;
TAILQ_ENTRY(dsp_cdevinfo) link;
};
#define PCM_RDCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->rdch)
#define PCM_WRCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->wrch)
#define PCM_VOLCH(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->volch)
#define PCM_SIMPLEX(x) (((struct dsp_cdevinfo *)(x)->si_drv1)->simplex)
#define DSP_CDEVINFO_CACHESIZE 8
#define DSP_REGISTERED(x, y) (PCM_REGISTERED(x) && \
(y) != NULL && (y)->si_drv1 != NULL)
#define OLDPCM_IOCTL
static d_open_t dsp_open;
static d_close_t dsp_close;
static d_read_t dsp_read;
static d_write_t dsp_write;
static d_ioctl_t dsp_ioctl;
static d_poll_t dsp_poll;
static d_mmap_t dsp_mmap;
struct cdevsw dsp_cdevsw = {
.d_version = D_VERSION,
.d_open = dsp_open,
.d_close = dsp_close,
.d_read = dsp_read,
.d_write = dsp_write,
.d_ioctl = dsp_ioctl,
.d_poll = dsp_poll,
.d_mmap = dsp_mmap,
.d_name = "dsp",
};
static eventhandler_tag dsp_ehtag = NULL;
static int dsp_umax = -1;
static int dsp_cmax = -1;
static int dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group);
static int dsp_oss_syncstart(int sg_id);
static int dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy);
static int dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled);
static int dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
static int dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map);
static int dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch, int *mask);
#ifdef OSSV4_EXPERIMENT
static int dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
static int dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label);
static int dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
static int dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song);
static int dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name);
#endif
static struct snddev_info *
dsp_get_info(struct cdev *dev)
{
return (devclass_get_softc(pcm_devclass, PCMUNIT(dev)));
}
static uint32_t
dsp_get_flags(struct cdev *dev)
{
device_t bdev;
bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
return ((bdev != NULL) ? pcm_getflags(bdev) : 0xffffffff);
}
static void
dsp_set_flags(struct cdev *dev, uint32_t flags)
{
device_t bdev;
bdev = devclass_get_device(pcm_devclass, PCMUNIT(dev));
if (bdev != NULL)
pcm_setflags(bdev, flags);
}
/*
* return the channels associated with an open device instance.
* lock channels specified.
*/
static int
getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch,
uint32_t prio)
{
struct snddev_info *d;
struct pcm_channel *ch;
uint32_t flags;
if (PCM_SIMPLEX(dev) != 0) {
d = dsp_get_info(dev);
if (!PCM_REGISTERED(d))
return (ENXIO);
PCM_LOCK(d);
PCM_WAIT(d);
PCM_ACQUIRE(d);
/*
* Note: order is important -
* pcm flags -> prio query flags -> wild guess
*/
ch = NULL;
flags = dsp_get_flags(dev);
if (flags & SD_F_PRIO_WR) {
ch = PCM_RDCH(dev);
PCM_RDCH(dev) = NULL;
} else if (flags & SD_F_PRIO_RD) {
ch = PCM_WRCH(dev);
PCM_WRCH(dev) = NULL;
} else if (prio & SD_F_PRIO_WR) {
ch = PCM_RDCH(dev);
PCM_RDCH(dev) = NULL;
flags |= SD_F_PRIO_WR;
} else if (prio & SD_F_PRIO_RD) {
ch = PCM_WRCH(dev);
PCM_WRCH(dev) = NULL;
flags |= SD_F_PRIO_RD;
} else if (PCM_WRCH(dev) != NULL) {
ch = PCM_RDCH(dev);
PCM_RDCH(dev) = NULL;
flags |= SD_F_PRIO_WR;
} else if (PCM_RDCH(dev) != NULL) {
ch = PCM_WRCH(dev);
PCM_WRCH(dev) = NULL;
flags |= SD_F_PRIO_RD;
}
PCM_SIMPLEX(dev) = 0;
dsp_set_flags(dev, flags);
if (ch != NULL) {
CHN_LOCK(ch);
pcm_chnref(ch, -1);
pcm_chnrelease(ch);
}
PCM_RELEASE(d);
PCM_UNLOCK(d);
}
*rdch = PCM_RDCH(dev);
*wrch = PCM_WRCH(dev);
if (*rdch != NULL && (prio & SD_F_PRIO_RD))
CHN_LOCK(*rdch);
if (*wrch != NULL && (prio & SD_F_PRIO_WR))
CHN_LOCK(*wrch);
return (0);
}
/* unlock specified channels */
static void
relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch,
uint32_t prio)
{
if (wrch != NULL && (prio & SD_F_PRIO_WR))
CHN_UNLOCK(wrch);
if (rdch != NULL && (prio & SD_F_PRIO_RD))
CHN_UNLOCK(rdch);
}
static void
dsp_cdevinfo_alloc(struct cdev *dev,
struct pcm_channel *rdch, struct pcm_channel *wrch,
struct pcm_channel *volch)
{
struct snddev_info *d;
struct dsp_cdevinfo *cdi;
int simplex;
d = dsp_get_info(dev);
KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 == NULL &&
((rdch == NULL && wrch == NULL) || rdch != wrch),
("bogus %s(), what are you trying to accomplish here?", __func__));
PCM_BUSYASSERT(d);
PCM_LOCKASSERT(d);
simplex = (dsp_get_flags(dev) & SD_F_SIMPLEX) ? 1 : 0;
/*
* Scan for free instance entry and put it into the end of list.
* Create new one if necessary.
*/
TAILQ_FOREACH(cdi, &d->dsp_cdevinfo_pool, link) {
if (cdi->busy != 0)
break;
cdi->rdch = rdch;
cdi->wrch = wrch;
cdi->volch = volch;
cdi->simplex = simplex;
cdi->busy = 1;
TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
dev->si_drv1 = cdi;
return;
}
PCM_UNLOCK(d);
cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
PCM_LOCK(d);
cdi->rdch = rdch;
cdi->wrch = wrch;
cdi->volch = volch;
cdi->simplex = simplex;
cdi->busy = 1;
TAILQ_INSERT_TAIL(&d->dsp_cdevinfo_pool, cdi, link);
dev->si_drv1 = cdi;
}
static void
dsp_cdevinfo_free(struct cdev *dev)
{
struct snddev_info *d;
struct dsp_cdevinfo *cdi, *tmp;
uint32_t flags;
int i;
d = dsp_get_info(dev);
KASSERT(PCM_REGISTERED(d) && dev != NULL && dev->si_drv1 != NULL &&
PCM_RDCH(dev) == NULL && PCM_WRCH(dev) == NULL &&
PCM_VOLCH(dev) == NULL,
("bogus %s(), what are you trying to accomplish here?", __func__));
PCM_BUSYASSERT(d);
PCM_LOCKASSERT(d);
cdi = dev->si_drv1;
dev->si_drv1 = NULL;
cdi->rdch = NULL;
cdi->wrch = NULL;
cdi->volch = NULL;
cdi->simplex = 0;
cdi->busy = 0;
/*
* Once it is free, move it back to the beginning of list for
* faster new entry allocation.
*/
TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
/*
* Scan the list, cache free entries up to DSP_CDEVINFO_CACHESIZE.
* Reset simplex flags.
*/
flags = dsp_get_flags(dev) & ~SD_F_PRIO_SET;
i = DSP_CDEVINFO_CACHESIZE;
TAILQ_FOREACH_SAFE(cdi, &d->dsp_cdevinfo_pool, link, tmp) {
if (cdi->busy != 0) {
if (cdi->simplex == 0) {
if (cdi->rdch != NULL)
flags |= SD_F_PRIO_RD;
if (cdi->wrch != NULL)
flags |= SD_F_PRIO_WR;
}
} else {
if (i == 0) {
TAILQ_REMOVE(&d->dsp_cdevinfo_pool, cdi, link);
free(cdi, M_DEVBUF);
} else
i--;
}
}
dsp_set_flags(dev, flags);
}
void
dsp_cdevinfo_init(struct snddev_info *d)
{
struct dsp_cdevinfo *cdi;
int i;
KASSERT(d != NULL, ("NULL snddev_info"));
PCM_BUSYASSERT(d);
PCM_UNLOCKASSERT(d);
TAILQ_INIT(&d->dsp_cdevinfo_pool);
for (i = 0; i < DSP_CDEVINFO_CACHESIZE; i++) {
cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
TAILQ_INSERT_HEAD(&d->dsp_cdevinfo_pool, cdi, link);
}
}
void
dsp_cdevinfo_flush(struct snddev_info *d)
{
struct dsp_cdevinfo *cdi, *tmp;
KASSERT(d != NULL, ("NULL snddev_info"));
PCM_BUSYASSERT(d);
PCM_UNLOCKASSERT(d);
cdi = TAILQ_FIRST(&d->dsp_cdevinfo_pool);
while (cdi != NULL) {
tmp = TAILQ_NEXT(cdi, link);
free(cdi, M_DEVBUF);
cdi = tmp;
}
TAILQ_INIT(&d->dsp_cdevinfo_pool);
}
/* duplex / simplex cdev type */
enum {
DSP_CDEV_TYPE_RDONLY, /* simplex read-only (record) */
DSP_CDEV_TYPE_WRONLY, /* simplex write-only (play) */
DSP_CDEV_TYPE_RDWR /* duplex read, write, or both */
};
enum {
DSP_CDEV_VOLCTL_NONE,
DSP_CDEV_VOLCTL_READ,
DSP_CDEV_VOLCTL_WRITE
};
#define DSP_F_VALID(x) ((x) & (FREAD | FWRITE))
#define DSP_F_DUPLEX(x) (((x) & (FREAD | FWRITE)) == (FREAD | FWRITE))
#define DSP_F_SIMPLEX(x) (!DSP_F_DUPLEX(x))
#define DSP_F_READ(x) ((x) & FREAD)
#define DSP_F_WRITE(x) ((x) & FWRITE)
static const struct {
int type;
char *name;
char *sep;
char *alias;
int use_sep;
int hw;
int max;
int volctl;
uint32_t fmt, spd;
int query;
} dsp_cdevs[] = {
{ SND_DEV_DSP, "dsp", ".", NULL, 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_AUDIO, "audio", ".", NULL, 0, 0, 0, 0,
SND_FORMAT(AFMT_MU_LAW, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSP16, "dspW", ".", NULL, 0, 0, 0, 0,
SND_FORMAT(AFMT_S16_LE, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSPHW_PLAY, "dsp", ".p", NULL, 1, 1, SND_MAXHWCHAN, 1,
SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
{ SND_DEV_DSPHW_VPLAY, "dsp", ".vp", NULL, 1, 1, SND_MAXVCHANS, 1,
SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_WRONLY },
{ SND_DEV_DSPHW_REC, "dsp", ".r", NULL, 1, 1, SND_MAXHWCHAN, 1,
SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
{ SND_DEV_DSPHW_VREC, "dsp", ".vr", NULL, 1, 1, SND_MAXVCHANS, 1,
SND_FORMAT(AFMT_S16_LE, 2, 0), 48000, DSP_CDEV_TYPE_RDONLY },
{ SND_DEV_DSPHW_CD, "dspcd", ".", NULL, 0, 0, 0, 0,
SND_FORMAT(AFMT_S16_LE, 2, 0), 44100, DSP_CDEV_TYPE_RDWR },
/* Low priority, OSSv4 aliases. */
{ SND_DEV_DSP, "dsp_ac3", ".", "dsp", 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSP, "dsp_mmap", ".", "dsp", 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSP, "dsp_multich", ".", "dsp", 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSP, "dsp_spdifout", ".", "dsp", 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
{ SND_DEV_DSP, "dsp_spdifin", ".", "dsp", 0, 0, 0, 0,
SND_FORMAT(AFMT_U8, 1, 0), DSP_DEFAULT_SPEED,
DSP_CDEV_TYPE_RDWR },
};
#define DSP_FIXUP_ERROR() do { \
prio = dsp_get_flags(i_dev); \
if (!DSP_F_VALID(flags)) \
error = EINVAL; \
if (!DSP_F_DUPLEX(flags) && \
((DSP_F_READ(flags) && d->reccount == 0) || \
(DSP_F_WRITE(flags) && d->playcount == 0))) \
error = ENOTSUP; \
else if (!DSP_F_DUPLEX(flags) && (prio & SD_F_SIMPLEX) && \
((DSP_F_READ(flags) && (prio & SD_F_PRIO_WR)) || \
(DSP_F_WRITE(flags) && (prio & SD_F_PRIO_RD)))) \
error = EBUSY; \
else if (DSP_REGISTERED(d, i_dev)) \
error = EBUSY; \
} while (0)
static int
dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
{
struct pcm_channel *rdch, *wrch;
struct snddev_info *d;
uint32_t fmt, spd, prio, volctl;
int i, error, rderror, wrerror, devtype, wdevunit, rdevunit;
/* Kind of impossible.. */
if (i_dev == NULL || td == NULL)
return (ENODEV);
d = dsp_get_info(i_dev);
if (!PCM_REGISTERED(d))
return (EBADF);
PCM_GIANT_ENTER(d);
/* Lock snddev so nobody else can monkey with it. */
PCM_LOCK(d);
PCM_WAIT(d);
/*
* Try to acquire cloned device before someone else pick it.
* ENODEV means this is not a cloned droids.
*/
error = snd_clone_acquire(i_dev);
if (!(error == 0 || error == ENODEV)) {
DSP_FIXUP_ERROR();
PCM_UNLOCK(d);
PCM_GIANT_EXIT(d);
return (error);
}
error = 0;
DSP_FIXUP_ERROR();
if (error != 0) {
(void)snd_clone_release(i_dev);
PCM_UNLOCK(d);
PCM_GIANT_EXIT(d);
return (error);
}
/*
* That is just enough. Acquire and unlock pcm lock so
* the other will just have to wait until we finish doing
* everything.
*/
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
devtype = PCMDEV(i_dev);
wdevunit = -1;
rdevunit = -1;
fmt = 0;
spd = 0;
volctl = DSP_CDEV_VOLCTL_NONE;
for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
if (devtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
continue;
/*
* Volume control only valid for DSPHW devices,
* and it must be opened in opposite direction be it
* simplex or duplex. Anything else will be handled
* as usual.
*/
if (dsp_cdevs[i].query == DSP_CDEV_TYPE_WRONLY) {
if (dsp_cdevs[i].volctl != 0 &&
DSP_F_READ(flags)) {
volctl = DSP_CDEV_VOLCTL_WRITE;
flags &= ~FREAD;
flags |= FWRITE;
}
if (DSP_F_READ(flags)) {
(void)snd_clone_release(i_dev);
PCM_RELEASE_QUICK(d);
PCM_GIANT_EXIT(d);
return (ENOTSUP);
}
wdevunit = dev2unit(i_dev);
} else if (dsp_cdevs[i].query == DSP_CDEV_TYPE_RDONLY) {
if (dsp_cdevs[i].volctl != 0 &&
DSP_F_WRITE(flags)) {
volctl = DSP_CDEV_VOLCTL_READ;
flags &= ~FWRITE;
flags |= FREAD;
}
if (DSP_F_WRITE(flags)) {
(void)snd_clone_release(i_dev);
PCM_RELEASE_QUICK(d);
PCM_GIANT_EXIT(d);
return (ENOTSUP);
}
rdevunit = dev2unit(i_dev);
}
fmt = dsp_cdevs[i].fmt;
spd = dsp_cdevs[i].spd;
break;
}
/* No matching devtype? */
if (fmt == 0 || spd == 0)
panic("impossible devtype %d", devtype);
rdch = NULL;
wrch = NULL;
rderror = 0;
wrerror = 0;
/*
* if we get here, the open request is valid- either:
* * we were previously not open
* * we were open for play xor record and the opener wants
* the non-open direction
*/
if (DSP_F_READ(flags)) {
/* open for read */
rderror = pcm_chnalloc(d, &rdch, PCMDIR_REC,
td->td_proc->p_pid, td->td_proc->p_comm, rdevunit);
if (rderror == 0 && chn_reset(rdch, fmt, spd) != 0)
rderror = ENXIO;
if (volctl == DSP_CDEV_VOLCTL_READ)
rderror = 0;
if (rderror != 0) {
if (rdch != NULL)
pcm_chnrelease(rdch);
if (!DSP_F_DUPLEX(flags)) {
(void)snd_clone_release(i_dev);
PCM_RELEASE_QUICK(d);
PCM_GIANT_EXIT(d);
return (rderror);
}
rdch = NULL;
} else if (volctl == DSP_CDEV_VOLCTL_READ) {
if (rdch != NULL) {
pcm_chnref(rdch, 1);
pcm_chnrelease(rdch);
}
} else {
if (flags & O_NONBLOCK)
rdch->flags |= CHN_F_NBIO;
if (flags & O_EXCL)
rdch->flags |= CHN_F_EXCLUSIVE;
pcm_chnref(rdch, 1);
if (volctl == DSP_CDEV_VOLCTL_NONE)
chn_vpc_reset(rdch, SND_VOL_C_PCM, 0);
CHN_UNLOCK(rdch);
}
}
if (DSP_F_WRITE(flags)) {
/* open for write */
wrerror = pcm_chnalloc(d, &wrch, PCMDIR_PLAY,
td->td_proc->p_pid, td->td_proc->p_comm, wdevunit);
if (wrerror == 0 && chn_reset(wrch, fmt, spd) != 0)
wrerror = ENXIO;
if (volctl == DSP_CDEV_VOLCTL_WRITE)
wrerror = 0;
if (wrerror != 0) {
if (wrch != NULL)
pcm_chnrelease(wrch);
if (!DSP_F_DUPLEX(flags)) {
if (rdch != NULL) {
/*
* Lock, deref and release previously
* created record channel
*/
CHN_LOCK(rdch);
pcm_chnref(rdch, -1);
pcm_chnrelease(rdch);
}
(void)snd_clone_release(i_dev);
PCM_RELEASE_QUICK(d);
PCM_GIANT_EXIT(d);
return (wrerror);
}
wrch = NULL;
} else if (volctl == DSP_CDEV_VOLCTL_WRITE) {
if (wrch != NULL) {
pcm_chnref(wrch, 1);
pcm_chnrelease(wrch);
}
} else {
if (flags & O_NONBLOCK)
wrch->flags |= CHN_F_NBIO;
if (flags & O_EXCL)
wrch->flags |= CHN_F_EXCLUSIVE;
pcm_chnref(wrch, 1);
if (volctl == DSP_CDEV_VOLCTL_NONE)
chn_vpc_reset(wrch, SND_VOL_C_PCM, 0);
CHN_UNLOCK(wrch);
}
}
PCM_LOCK(d);
/*
* We're done. Allocate channels information for this cdev.
*/
switch (volctl) {
case DSP_CDEV_VOLCTL_READ:
KASSERT(wrch == NULL, ("wrch=%p not null!", wrch));
dsp_cdevinfo_alloc(i_dev, NULL, NULL, rdch);
break;
case DSP_CDEV_VOLCTL_WRITE:
KASSERT(rdch == NULL, ("rdch=%p not null!", rdch));
dsp_cdevinfo_alloc(i_dev, NULL, NULL, wrch);
break;
case DSP_CDEV_VOLCTL_NONE:
default:
if (wrch == NULL && rdch == NULL) {
(void)snd_clone_release(i_dev);
PCM_RELEASE(d);
PCM_UNLOCK(d);
PCM_GIANT_EXIT(d);
if (wrerror != 0)
return (wrerror);
if (rderror != 0)
return (rderror);
return (EINVAL);
}
dsp_cdevinfo_alloc(i_dev, rdch, wrch, NULL);
if (rdch != NULL)
CHN_INSERT_HEAD(d, rdch, channels.pcm.opened);
if (wrch != NULL)
CHN_INSERT_HEAD(d, wrch, channels.pcm.opened);
break;
}
/*
* Increase clone refcount for its automatic garbage collector.
*/
(void)snd_clone_ref(i_dev);
PCM_RELEASE(d);
PCM_UNLOCK(d);
PCM_GIANT_LEAVE(d);
return (0);
}
static int
dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
{
struct pcm_channel *rdch, *wrch, *volch;
struct snddev_info *d;
int sg_ids, rdref, wdref;
d = dsp_get_info(i_dev);
if (!DSP_REGISTERED(d, i_dev))
return (EBADF);
PCM_GIANT_ENTER(d);
PCM_LOCK(d);
PCM_WAIT(d);
PCM_ACQUIRE(d);
rdch = PCM_RDCH(i_dev);
wrch = PCM_WRCH(i_dev);
volch = PCM_VOLCH(i_dev);
PCM_RDCH(i_dev) = NULL;
PCM_WRCH(i_dev) = NULL;
PCM_VOLCH(i_dev) = NULL;
rdref = -1;
wdref = -1;
if (volch != NULL) {
if (volch == rdch)
rdref--;
else if (volch == wrch)
wdref--;
else {
CHN_LOCK(volch);
pcm_chnref(volch, -1);
CHN_UNLOCK(volch);
}
}
if (rdch != NULL)
CHN_REMOVE(d, rdch, channels.pcm.opened);
if (wrch != NULL)
CHN_REMOVE(d, wrch, channels.pcm.opened);
if (rdch != NULL || wrch != NULL) {
PCM_UNLOCK(d);
if (rdch != NULL) {
/*
* The channel itself need not be locked because:
* a) Adding a channel to a syncgroup happens only
* in dsp_ioctl(), which cannot run concurrently
* to dsp_close().
* b) The syncmember pointer (sm) is protected by
* the global syncgroup list lock.
* c) A channel can't just disappear, invalidating
* pointers, unless it's closed/dereferenced
* first.
*/
PCM_SG_LOCK();
sg_ids = chn_syncdestroy(rdch);
PCM_SG_UNLOCK();
if (sg_ids != 0)
free_unr(pcmsg_unrhdr, sg_ids);
CHN_LOCK(rdch);
pcm_chnref(rdch, rdref);
chn_abort(rdch); /* won't sleep */
rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
CHN_F_DEAD | CHN_F_EXCLUSIVE);
chn_reset(rdch, 0, 0);
pcm_chnrelease(rdch);
}
if (wrch != NULL) {
/*
* Please see block above.
*/
PCM_SG_LOCK();
sg_ids = chn_syncdestroy(wrch);
PCM_SG_UNLOCK();
if (sg_ids != 0)
free_unr(pcmsg_unrhdr, sg_ids);
CHN_LOCK(wrch);
pcm_chnref(wrch, wdref);
chn_flush(wrch); /* may sleep */
wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
CHN_F_DEAD | CHN_F_EXCLUSIVE);
chn_reset(wrch, 0, 0);
pcm_chnrelease(wrch);
}
PCM_LOCK(d);
}
dsp_cdevinfo_free(i_dev);
/*
* Release clone busy state and unref it so the automatic
* garbage collector will get the hint and do the remaining
* cleanup process.
*/
(void)snd_clone_release(i_dev);
/*
* destroy_dev() might sleep, so release pcm lock
* here and rely on pcm cv serialization.
*/
PCM_UNLOCK(d);
(void)snd_clone_unref(i_dev);
PCM_LOCK(d);
PCM_RELEASE(d);
PCM_UNLOCK(d);
PCM_GIANT_LEAVE(d);
return (0);
}
static __inline int
dsp_io_ops(struct cdev *i_dev, struct uio *buf)
{
struct snddev_info *d;
struct pcm_channel **ch, *rdch, *wrch;
int (*chn_io)(struct pcm_channel *, struct uio *);
int prio, ret;
pid_t runpid;
KASSERT(i_dev != NULL && buf != NULL &&
(buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
("%s(): io train wreck!", __func__));
d = dsp_get_info(i_dev);
if (!DSP_REGISTERED(d, i_dev))
return (EBADF);
PCM_GIANT_ENTER(d);
switch (buf->uio_rw) {
case UIO_READ:
prio = SD_F_PRIO_RD;
ch = &rdch;
chn_io = chn_read;
break;
case UIO_WRITE:
prio = SD_F_PRIO_WR;
ch = &wrch;
chn_io = chn_write;
break;
default:
panic("invalid/corrupted uio direction: %d", buf->uio_rw);
break;
}
rdch = NULL;
wrch = NULL;
runpid = buf->uio_td->td_proc->p_pid;
getchns(i_dev, &rdch, &wrch, prio);
if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
PCM_GIANT_EXIT(d);
return (EBADF);
}
if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
(((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
relchns(i_dev, rdch, wrch, prio);
PCM_GIANT_EXIT(d);
return (EINVAL);
} else if (!((*ch)->flags & CHN_F_RUNNING)) {
(*ch)->flags |= CHN_F_RUNNING;
(*ch)->pid = runpid;
}
/*
* chn_read/write must give up channel lock in order to copy bytes
* from/to userland, so up the "in progress" counter to make sure
* someone else doesn't come along and muss up the buffer.
*/
++(*ch)->inprog;
ret = chn_io(*ch, buf);
--(*ch)->inprog;
CHN_BROADCAST(&(*ch)->cv);
relchns(i_dev, rdch, wrch, prio);
PCM_GIANT_LEAVE(d);
return (ret);
}
static int
dsp_read(struct cdev *i_dev, struct uio *buf, int flag)
{
return (dsp_io_ops(i_dev, buf));
}
static int
dsp_write(struct cdev *i_dev, struct uio *buf, int flag)
{
return (dsp_io_ops(i_dev, buf));
}
static int
dsp_get_volume_channel(struct cdev *dev, struct pcm_channel **volch)
{
struct snddev_info *d;
struct pcm_channel *c;
int unit;
KASSERT(dev != NULL && volch != NULL,
("%s(): NULL query dev=%p volch=%p", __func__, dev, volch));
d = dsp_get_info(dev);
if (!PCM_REGISTERED(d)) {
*volch = NULL;
return (EINVAL);
}
PCM_UNLOCKASSERT(d);
*volch = NULL;
c = PCM_VOLCH(dev);
if (c != NULL) {
if (!(c->feederflags & (1 << FEEDER_VOLUME)))
return (-1);
*volch = c;
return (0);
}
PCM_LOCK(d);
PCM_WAIT(d);
PCM_ACQUIRE(d);
unit = dev2unit(dev);
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->unit != unit) {
CHN_UNLOCK(c);
continue;
}
*volch = c;
pcm_chnref(c, 1);
PCM_VOLCH(dev) = c;
CHN_UNLOCK(c);
PCM_RELEASE(d);
PCM_UNLOCK(d);
return ((c->feederflags & (1 << FEEDER_VOLUME)) ? 0 : -1);
}
PCM_RELEASE(d);
PCM_UNLOCK(d);
return (EINVAL);
}
static int
dsp_ioctl_channel(struct cdev *dev, struct pcm_channel *volch, u_long cmd,
caddr_t arg)
{
struct snddev_info *d;
struct pcm_channel *rdch, *wrch;
int j, devtype, ret;
d = dsp_get_info(dev);
if (!PCM_REGISTERED(d) || !(dsp_get_flags(dev) & SD_F_VPC))
return (-1);
PCM_UNLOCKASSERT(d);
j = cmd & 0xff;
rdch = PCM_RDCH(dev);
wrch = PCM_WRCH(dev);
/* No specific channel, look into cache */
if (volch == NULL)
volch = PCM_VOLCH(dev);
/* Look harder */
if (volch == NULL) {
if (j == SOUND_MIXER_RECLEV && rdch != NULL)
volch = rdch;
else if (j == SOUND_MIXER_PCM && wrch != NULL)
volch = wrch;
}
devtype = PCMDEV(dev);
/* Look super harder */
if (volch == NULL &&
(devtype == SND_DEV_DSPHW_PLAY || devtype == SND_DEV_DSPHW_VPLAY ||
devtype == SND_DEV_DSPHW_REC || devtype == SND_DEV_DSPHW_VREC)) {
ret = dsp_get_volume_channel(dev, &volch);
if (ret != 0)
return (ret);
if (volch == NULL)
return (EINVAL);
}
/* Final validation */
if (volch != NULL) {
CHN_LOCK(volch);
if (!(volch->feederflags & (1 << FEEDER_VOLUME))) {
CHN_UNLOCK(volch);
return (-1);
}
if (volch->direction == PCMDIR_PLAY)
wrch = volch;
else
rdch = volch;
}
ret = EINVAL;
if (volch != NULL &&
((j == SOUND_MIXER_PCM && volch->direction == PCMDIR_PLAY) ||
(j == SOUND_MIXER_RECLEV && volch->direction == PCMDIR_REC))) {
if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
int left, right, center;
left = *(int *)arg & 0x7f;
right = ((*(int *)arg) >> 8) & 0x7f;
center = (left + right) >> 1;
chn_setvolume_multi(volch, SND_VOL_C_PCM, left, right,
center);
} else if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
*(int *)arg = CHN_GETVOLUME(volch,
SND_VOL_C_PCM, SND_CHN_T_FL);
*(int *)arg |= CHN_GETVOLUME(volch,
SND_VOL_C_PCM, SND_CHN_T_FR) << 8;
}
ret = 0;
} else if (rdch != NULL || wrch != NULL) {
switch (j) {
case SOUND_MIXER_DEVMASK:
case SOUND_MIXER_CAPS:
case SOUND_MIXER_STEREODEVS:
if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
*(int *)arg = 0;
if (rdch != NULL)
*(int *)arg |= SOUND_MASK_RECLEV;
if (wrch != NULL)
*(int *)arg |= SOUND_MASK_PCM;
}
ret = 0;
break;
case SOUND_MIXER_RECMASK:
case SOUND_MIXER_RECSRC:
if ((cmd & MIXER_READ(0)) == MIXER_READ(0))
*(int *)arg = 0;
ret = 0;
break;
default:
break;
}
}
if (volch != NULL)
CHN_UNLOCK(volch);
return (ret);
}
static int
dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct thread *td)
{
struct pcm_channel *chn, *rdch, *wrch;
struct snddev_info *d;
int *arg_i, ret, tmp, xcmd;
d = dsp_get_info(i_dev);
if (!DSP_REGISTERED(d, i_dev))
return (EBADF);
PCM_GIANT_ENTER(d);
arg_i = (int *)arg;
ret = 0;
xcmd = 0;
chn = NULL;
if (IOCGROUP(cmd) == 'M') {
ret = dsp_ioctl_channel(i_dev, PCM_VOLCH(i_dev), cmd, arg);
if (ret != -1) {
PCM_GIANT_EXIT(d);
return (ret);
}
if (d->mixer_dev != NULL) {
PCM_ACQUIRE_QUICK(d);
ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
MIXER_CMD_DIRECT);
PCM_RELEASE_QUICK(d);
} else
ret = EBADF;
PCM_GIANT_EXIT(d);
return (ret);
}
/*
* Certain ioctls may be made on any type of device (audio, mixer,
* and MIDI). Handle those special cases here.
*/
if (IOCGROUP(cmd) == 'X') {
PCM_ACQUIRE_QUICK(d);
switch(cmd) {
case SNDCTL_SYSINFO:
sound_oss_sysinfo((oss_sysinfo *)arg);
break;
case SNDCTL_CARDINFO:
ret = sound_oss_card_info((oss_card_info *)arg);
break;
case SNDCTL_AUDIOINFO:
case SNDCTL_AUDIOINFO_EX:
case SNDCTL_ENGINEINFO:
ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
break;
case SNDCTL_MIXERINFO:
ret = mixer_oss_mixerinfo(i_dev, (oss_mixerinfo *)arg);
break;
default:
ret = EINVAL;
}
PCM_RELEASE_QUICK(d);
PCM_GIANT_EXIT(d);
return (ret);
}
getchns(i_dev, &rdch, &wrch, 0);
if (wrch != NULL && (wrch->flags & CHN_F_DEAD))
wrch = NULL;
if (rdch != NULL && (rdch->flags & CHN_F_DEAD))
rdch = NULL;
if (wrch == NULL && rdch == NULL) {
PCM_GIANT_EXIT(d);
return (EINVAL);
}
switch(cmd) {
#ifdef OLDPCM_IOCTL
/*
* we start with the new ioctl interface.
*/
case AIONWRITE: /* how many bytes can write ? */
if (wrch) {
CHN_LOCK(wrch);
/*
if (wrch && wrch->bufhard.dl)
while (chn_wrfeed(wrch) == 0);
*/
*arg_i = sndbuf_getfree(wrch->bufsoft);
CHN_UNLOCK(wrch);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case AIOSSIZE: /* set the current blocksize */
{
struct snd_size *p = (struct snd_size *)arg;
p->play_size = 0;
p->rec_size = 0;
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
chn_setblocksize(wrch, 2, p->play_size);
p->play_size = sndbuf_getblksz(wrch->bufsoft);
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
chn_setblocksize(rdch, 2, p->rec_size);
p->rec_size = sndbuf_getblksz(rdch->bufsoft);
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
}
break;
case AIOGSIZE: /* get the current blocksize */
{
struct snd_size *p = (struct snd_size *)arg;
if (wrch) {
CHN_LOCK(wrch);
p->play_size = sndbuf_getblksz(wrch->bufsoft);
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
p->rec_size = sndbuf_getblksz(rdch->bufsoft);
CHN_UNLOCK(rdch);
}
}
break;
case AIOSFMT:
case AIOGFMT:
{
snd_chan_param *p = (snd_chan_param *)arg;
if (cmd == AIOSFMT &&
((p->play_format != 0 && p->play_rate == 0) ||
(p->rec_format != 0 && p->rec_rate == 0))) {
ret = EINVAL;
break;
}
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
if (cmd == AIOSFMT && p->play_format != 0) {
chn_setformat(wrch,
SND_FORMAT(p->play_format,
AFMT_CHANNEL(wrch->format),
AFMT_EXTCHANNEL(wrch->format)));
chn_setspeed(wrch, p->play_rate);
}
p->play_rate = wrch->speed;
p->play_format = AFMT_ENCODING(wrch->format);
CHN_UNLOCK(wrch);
} else {
p->play_rate = 0;
p->play_format = 0;
}
if (rdch) {
CHN_LOCK(rdch);
if (cmd == AIOSFMT && p->rec_format != 0) {
chn_setformat(rdch,
SND_FORMAT(p->rec_format,
AFMT_CHANNEL(rdch->format),
AFMT_EXTCHANNEL(rdch->format)));
chn_setspeed(rdch, p->rec_rate);
}
p->rec_rate = rdch->speed;
p->rec_format = AFMT_ENCODING(rdch->format);
CHN_UNLOCK(rdch);
} else {
p->rec_rate = 0;
p->rec_format = 0;
}
PCM_RELEASE_QUICK(d);
}
break;
case AIOGCAP: /* get capabilities */
{
snd_capabilities *p = (snd_capabilities *)arg;
struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
struct cdev *pdev;
PCM_LOCK(d);
if (rdch) {
CHN_LOCK(rdch);
rcaps = chn_getcaps(rdch);
}
if (wrch) {
CHN_LOCK(wrch);
pcaps = chn_getcaps(wrch);
}
p->rate_min = max(rcaps? rcaps->minspeed : 0,
pcaps? pcaps->minspeed : 0);
p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
pcaps? pcaps->maxspeed : 1000000);
p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
/* XXX bad on sb16 */
p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
(wrch? chn_getformats(wrch) : 0xffffffff);
if (rdch && wrch)
p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
pdev = d->mixer_dev;
p->mixers = 1; /* default: one mixer */
p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0;
p->left = p->right = 100;
if (wrch)
CHN_UNLOCK(wrch);
if (rdch)
CHN_UNLOCK(rdch);
PCM_UNLOCK(d);
}
break;
case AIOSTOP:
if (*arg_i == AIOSYNC_PLAY && wrch) {
CHN_LOCK(wrch);
*arg_i = chn_abort(wrch);
CHN_UNLOCK(wrch);
} else if (*arg_i == AIOSYNC_CAPTURE && rdch) {
CHN_LOCK(rdch);
*arg_i = chn_abort(rdch);
CHN_UNLOCK(rdch);
} else {
printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
*arg_i = 0;
}
break;
case AIOSYNC:
printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
break;
#endif
/*
* here follow the standard ioctls (filio.h etc.)
*/
case FIONREAD: /* get # bytes to read */
if (rdch) {
CHN_LOCK(rdch);
/* if (rdch && rdch->bufhard.dl)
while (chn_rdfeed(rdch) == 0);
*/
*arg_i = sndbuf_getready(rdch->bufsoft);
CHN_UNLOCK(rdch);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case FIOASYNC: /*set/clear async i/o */
DEB( printf("FIOASYNC\n") ; )
break;
case SNDCTL_DSP_NONBLOCK: /* set non-blocking i/o */
case FIONBIO: /* set/clear non-blocking i/o */
if (rdch) {
CHN_LOCK(rdch);
if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
rdch->flags |= CHN_F_NBIO;
else
rdch->flags &= ~CHN_F_NBIO;
CHN_UNLOCK(rdch);
}
if (wrch) {
CHN_LOCK(wrch);
if (cmd == SNDCTL_DSP_NONBLOCK || *arg_i)
wrch->flags |= CHN_F_NBIO;
else
wrch->flags &= ~CHN_F_NBIO;
CHN_UNLOCK(wrch);
}
break;
/*
* Finally, here is the linux-compatible ioctl interface
*/
#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
case SNDCTL_DSP_GETBLKSIZE:
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
*arg_i = sndbuf_getblksz(chn->bufsoft);
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case SNDCTL_DSP_SETBLKSIZE:
RANGE(*arg_i, 16, 65536);
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
chn_setblocksize(wrch, 2, *arg_i);
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
chn_setblocksize(rdch, 2, *arg_i);
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_RESET:
DEB(printf("dsp reset\n"));
if (wrch) {
CHN_LOCK(wrch);
chn_abort(wrch);
chn_resetbuf(wrch);
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
chn_abort(rdch);
chn_resetbuf(rdch);
CHN_UNLOCK(rdch);
}
break;
case SNDCTL_DSP_SYNC:
DEB(printf("dsp sync\n"));
/* chn_sync may sleep */
if (wrch) {
CHN_LOCK(wrch);
chn_sync(wrch, 0);
CHN_UNLOCK(wrch);
}
break;
case SNDCTL_DSP_SPEED:
/* chn_setspeed may sleep */
tmp = 0;
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
ret = chn_setspeed(wrch, *arg_i);
tmp = wrch->speed;
CHN_UNLOCK(wrch);
}
if (rdch && ret == 0) {
CHN_LOCK(rdch);
ret = chn_setspeed(rdch, *arg_i);
if (tmp == 0)
tmp = rdch->speed;
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
*arg_i = tmp;
break;
case SOUND_PCM_READ_RATE:
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
*arg_i = chn->speed;
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case SNDCTL_DSP_STEREO:
tmp = -1;
*arg_i = (*arg_i)? 2 : 1;
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
ret = chn_setformat(wrch,
SND_FORMAT(wrch->format, *arg_i, 0));
tmp = (AFMT_CHANNEL(wrch->format) > 1)? 1 : 0;
CHN_UNLOCK(wrch);
}
if (rdch && ret == 0) {
CHN_LOCK(rdch);
ret = chn_setformat(rdch,
SND_FORMAT(rdch->format, *arg_i, 0));
if (tmp == -1)
tmp = (AFMT_CHANNEL(rdch->format) > 1)? 1 : 0;
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
*arg_i = tmp;
break;
case SOUND_PCM_WRITE_CHANNELS:
/* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
if (*arg_i < 0) {
*arg_i = 0;
ret = EINVAL;
break;
}
if (*arg_i != 0) {
struct pcmchan_matrix *m;
uint32_t ext;
tmp = 0;
if (*arg_i > SND_CHN_MAX)
*arg_i = SND_CHN_MAX;
m = feeder_matrix_default_channel_map(*arg_i);
if (m != NULL)
ext = m->ext;
else
ext = 0;
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
ret = chn_setformat(wrch,
SND_FORMAT(wrch->format, *arg_i, ext));
tmp = AFMT_CHANNEL(wrch->format);
CHN_UNLOCK(wrch);
}
if (rdch && ret == 0) {
CHN_LOCK(rdch);
ret = chn_setformat(rdch,
SND_FORMAT(rdch->format, *arg_i, ext));
if (tmp == 0)
tmp = AFMT_CHANNEL(rdch->format);
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
*arg_i = tmp;
} else {
chn = wrch ? wrch : rdch;
CHN_LOCK(chn);
*arg_i = AFMT_CHANNEL(chn->format);
CHN_UNLOCK(chn);
}
break;
case SOUND_PCM_READ_CHANNELS:
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
*arg_i = AFMT_CHANNEL(chn->format);
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
*arg_i = chn_getformats(chn);
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case SNDCTL_DSP_SETFMT: /* sets _one_ format */
if (*arg_i != AFMT_QUERY) {
tmp = 0;
PCM_ACQUIRE_QUICK(d);
if (wrch) {
CHN_LOCK(wrch);
ret = chn_setformat(wrch, SND_FORMAT(*arg_i,
AFMT_CHANNEL(wrch->format),
AFMT_EXTCHANNEL(wrch->format)));
tmp = wrch->format;
CHN_UNLOCK(wrch);
}
if (rdch && ret == 0) {
CHN_LOCK(rdch);
ret = chn_setformat(rdch, SND_FORMAT(*arg_i,
AFMT_CHANNEL(rdch->format),
AFMT_EXTCHANNEL(rdch->format)));
if (tmp == 0)
tmp = rdch->format;
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
*arg_i = AFMT_ENCODING(tmp);
} else {
chn = wrch ? wrch : rdch;
CHN_LOCK(chn);
*arg_i = AFMT_ENCODING(chn->format);
CHN_UNLOCK(chn);
}
break;
case SNDCTL_DSP_SETFRAGMENT:
DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
{
uint32_t fragln = (*arg_i) & 0x0000ffff;
uint32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
uint32_t fragsz;
uint32_t r_maxfrags, r_fragsz;
RANGE(fragln, 4, 16);
fragsz = 1 << fragln;
if (maxfrags == 0)
maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
if (maxfrags < 2)
maxfrags = 2;
if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
PCM_ACQUIRE_QUICK(d);
if (rdch) {
CHN_LOCK(rdch);
ret = chn_setblocksize(rdch, maxfrags, fragsz);
r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
r_fragsz = sndbuf_getblksz(rdch->bufsoft);
CHN_UNLOCK(rdch);
} else {
r_maxfrags = maxfrags;
r_fragsz = fragsz;
}
if (wrch && ret == 0) {
CHN_LOCK(wrch);
ret = chn_setblocksize(wrch, maxfrags, fragsz);
maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
fragsz = sndbuf_getblksz(wrch->bufsoft);
CHN_UNLOCK(wrch);
} else { /* use whatever came from the read channel */
maxfrags = r_maxfrags;
fragsz = r_fragsz;
}
PCM_RELEASE_QUICK(d);
fragln = 0;
while (fragsz > 1) {
fragln++;
fragsz >>= 1;
}
*arg_i = (maxfrags << 16) | fragln;
}
break;
case SNDCTL_DSP_GETISPACE:
/* return the size of data available in the input queue */
{
audio_buf_info *a = (audio_buf_info *)arg;
if (rdch) {
struct snd_dbuf *bs = rdch->bufsoft;
CHN_LOCK(rdch);
a->bytes = sndbuf_getready(bs);
a->fragments = a->bytes / sndbuf_getblksz(bs);
a->fragstotal = sndbuf_getblkcnt(bs);
a->fragsize = sndbuf_getblksz(bs);
CHN_UNLOCK(rdch);
} else
ret = EINVAL;
}
break;
case SNDCTL_DSP_GETOSPACE:
/* return space available in the output queue */
{
audio_buf_info *a = (audio_buf_info *)arg;
if (wrch) {
struct snd_dbuf *bs = wrch->bufsoft;
CHN_LOCK(wrch);
/* XXX abusive DMA update: chn_wrupdate(wrch); */
a->bytes = sndbuf_getfree(bs);
a->fragments = a->bytes / sndbuf_getblksz(bs);
a->fragstotal = sndbuf_getblkcnt(bs);
a->fragsize = sndbuf_getblksz(bs);
CHN_UNLOCK(wrch);
} else
ret = EINVAL;
}
break;
case SNDCTL_DSP_GETIPTR:
{
count_info *a = (count_info *)arg;
if (rdch) {
struct snd_dbuf *bs = rdch->bufsoft;
CHN_LOCK(rdch);
/* XXX abusive DMA update: chn_rdupdate(rdch); */
a->bytes = sndbuf_gettotal(bs);
a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
a->ptr = sndbuf_getreadyptr(bs);
rdch->blocks = sndbuf_getblocks(bs);
CHN_UNLOCK(rdch);
} else
ret = EINVAL;
}
break;
case SNDCTL_DSP_GETOPTR:
{
count_info *a = (count_info *)arg;
if (wrch) {
struct snd_dbuf *bs = wrch->bufsoft;
CHN_LOCK(wrch);
/* XXX abusive DMA update: chn_wrupdate(wrch); */
a->bytes = sndbuf_gettotal(bs);
a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
a->ptr = sndbuf_getreadyptr(bs);
wrch->blocks = sndbuf_getblocks(bs);
CHN_UNLOCK(wrch);
} else
ret = EINVAL;
}
break;
case SNDCTL_DSP_GETCAPS:
PCM_LOCK(d);
*arg_i = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER;
if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX))
*arg_i |= PCM_CAP_DUPLEX;
PCM_UNLOCK(d);
break;
case SOUND_PCM_READ_BITS:
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
if (chn->format & AFMT_8BIT)
*arg_i = 8;
else if (chn->format & AFMT_16BIT)
*arg_i = 16;
else if (chn->format & AFMT_24BIT)
*arg_i = 24;
else if (chn->format & AFMT_32BIT)
*arg_i = 32;
else
ret = EINVAL;
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
ret = EINVAL;
}
break;
case SNDCTL_DSP_SETTRIGGER:
if (rdch) {
CHN_LOCK(rdch);
rdch->flags &= ~CHN_F_NOTRIGGER;
if (*arg_i & PCM_ENABLE_INPUT)
chn_start(rdch, 1);
else {
chn_abort(rdch);
chn_resetbuf(rdch);
rdch->flags |= CHN_F_NOTRIGGER;
}
CHN_UNLOCK(rdch);
}
if (wrch) {
CHN_LOCK(wrch);
wrch->flags &= ~CHN_F_NOTRIGGER;
if (*arg_i & PCM_ENABLE_OUTPUT)
chn_start(wrch, 1);
else {
chn_abort(wrch);
chn_resetbuf(wrch);
wrch->flags |= CHN_F_NOTRIGGER;
}
CHN_UNLOCK(wrch);
}
break;
case SNDCTL_DSP_GETTRIGGER:
*arg_i = 0;
if (wrch) {
CHN_LOCK(wrch);
if (wrch->flags & CHN_F_TRIGGERED)
*arg_i |= PCM_ENABLE_OUTPUT;
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
if (rdch->flags & CHN_F_TRIGGERED)
*arg_i |= PCM_ENABLE_INPUT;
CHN_UNLOCK(rdch);
}
break;
case SNDCTL_DSP_GETODELAY:
if (wrch) {
struct snd_dbuf *bs = wrch->bufsoft;
CHN_LOCK(wrch);
/* XXX abusive DMA update: chn_wrupdate(wrch); */
*arg_i = sndbuf_getready(bs);
CHN_UNLOCK(wrch);
} else
ret = EINVAL;
break;
case SNDCTL_DSP_POST:
if (wrch) {
CHN_LOCK(wrch);
wrch->flags &= ~CHN_F_NOTRIGGER;
chn_start(wrch, 1);
CHN_UNLOCK(wrch);
}
break;
case SNDCTL_DSP_SETDUPLEX:
/*
* switch to full-duplex mode if card is in half-duplex
* mode and is able to work in full-duplex mode
*/
PCM_LOCK(d);
if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
PCM_UNLOCK(d);
break;
/*
* The following four ioctls are simple wrappers around mixer_ioctl
* with no further processing. xcmd is short for "translated
* command".
*/
case SNDCTL_DSP_GETRECVOL:
if (xcmd == 0) {
xcmd = SOUND_MIXER_READ_RECLEV;
chn = rdch;
}
/* FALLTHROUGH */
case SNDCTL_DSP_SETRECVOL:
if (xcmd == 0) {
xcmd = SOUND_MIXER_WRITE_RECLEV;
chn = rdch;
}
/* FALLTHROUGH */
case SNDCTL_DSP_GETPLAYVOL:
if (xcmd == 0) {
xcmd = SOUND_MIXER_READ_PCM;
chn = wrch;
}
/* FALLTHROUGH */
case SNDCTL_DSP_SETPLAYVOL:
if (xcmd == 0) {
xcmd = SOUND_MIXER_WRITE_PCM;
chn = wrch;
}
ret = dsp_ioctl_channel(i_dev, chn, xcmd, arg);
if (ret != -1) {
PCM_GIANT_EXIT(d);
return (ret);
}
if (d->mixer_dev != NULL) {
PCM_ACQUIRE_QUICK(d);
ret = mixer_ioctl_cmd(d->mixer_dev, xcmd, arg, -1, td,
MIXER_CMD_DIRECT);
PCM_RELEASE_QUICK(d);
} else
ret = ENOTSUP;
break;
case SNDCTL_DSP_GET_RECSRC_NAMES:
case SNDCTL_DSP_GET_RECSRC:
case SNDCTL_DSP_SET_RECSRC:
if (d->mixer_dev != NULL) {
PCM_ACQUIRE_QUICK(d);
ret = mixer_ioctl_cmd(d->mixer_dev, cmd, arg, -1, td,
MIXER_CMD_DIRECT);
PCM_RELEASE_QUICK(d);
} else
ret = ENOTSUP;
break;
/*
* The following 3 ioctls aren't very useful at the moment. For
* now, only a single channel is associated with a cdev (/dev/dspN
* instance), so there's only a single output routing to use (i.e.,
* the wrch bound to this cdev).
*/
case SNDCTL_DSP_GET_PLAYTGT_NAMES:
{
oss_mixer_enuminfo *ei;
ei = (oss_mixer_enuminfo *)arg;
ei->dev = 0;
ei->ctrl = 0;
ei->version = 0; /* static for now */
ei->strindex[0] = 0;
if (wrch != NULL) {
ei->nvalues = 1;
strlcpy(ei->strings, wrch->name,
sizeof(ei->strings));
} else {
ei->nvalues = 0;
ei->strings[0] = '\0';
}
}
break;
case SNDCTL_DSP_GET_PLAYTGT:
case SNDCTL_DSP_SET_PLAYTGT: /* yes, they are the same for now */
/*
* Re: SET_PLAYTGT
* OSSv4: "The value that was accepted by the device will
* be returned back in the variable pointed by the
* argument."
*/
if (wrch != NULL)
*arg_i = 0;
else
ret = EINVAL;
break;
case SNDCTL_DSP_SILENCE:
/*
* Flush the software (pre-feed) buffer, but try to minimize playback
* interruption. (I.e., record unplayed samples with intent to
* restore by SNDCTL_DSP_SKIP.) Intended for application "pause"
* functionality.
*/
if (wrch == NULL)
ret = EINVAL;
else {
struct snd_dbuf *bs;
CHN_LOCK(wrch);
while (wrch->inprog != 0)
cv_wait(&wrch->cv, wrch->lock);
bs = wrch->bufsoft;
if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
bs->sl = sndbuf_getready(bs);
sndbuf_dispose(bs, bs->shadbuf, sndbuf_getready(bs));
sndbuf_fillsilence(bs);
chn_start(wrch, 0);
}
CHN_UNLOCK(wrch);
}
break;
case SNDCTL_DSP_SKIP:
/*
* OSSv4 docs: "This ioctl call discards all unplayed samples in the
* playback buffer by moving the current write position immediately
* before the point where the device is currently reading the samples."
*/
if (wrch == NULL)
ret = EINVAL;
else {
struct snd_dbuf *bs;
CHN_LOCK(wrch);
while (wrch->inprog != 0)
cv_wait(&wrch->cv, wrch->lock);
bs = wrch->bufsoft;
if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
sndbuf_softreset(bs);
sndbuf_acquire(bs, bs->shadbuf, bs->sl);
bs->sl = 0;
chn_start(wrch, 0);
}
CHN_UNLOCK(wrch);
}
break;
case SNDCTL_DSP_CURRENT_OPTR:
case SNDCTL_DSP_CURRENT_IPTR:
/**
* @note Changing formats resets the buffer counters, which differs
* from the 4Front drivers. However, I don't expect this to be
* much of a problem.
*
* @note In a test where @c CURRENT_OPTR is called immediately after write
* returns, this driver is about 32K samples behind whereas
* 4Front's is about 8K samples behind. Should determine source
* of discrepancy, even if only out of curiosity.
*
* @todo Actually test SNDCTL_DSP_CURRENT_IPTR.
*/
chn = (cmd == SNDCTL_DSP_CURRENT_OPTR) ? wrch : rdch;
if (chn == NULL)
ret = EINVAL;
else {
struct snd_dbuf *bs;
/* int tmp; */
oss_count_t *oc = (oss_count_t *)arg;
CHN_LOCK(chn);
bs = chn->bufsoft;
#if 0
tmp = (sndbuf_getsize(b) + chn_getptr(chn) - sndbuf_gethwptr(b)) % sndbuf_getsize(b);
oc->samples = (sndbuf_gettotal(b) + tmp) / sndbuf_getalign(b);
oc->fifo_samples = (sndbuf_getready(b) - tmp) / sndbuf_getalign(b);
#else
oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
#endif
CHN_UNLOCK(chn);
}
break;
case SNDCTL_DSP_HALT_OUTPUT:
case SNDCTL_DSP_HALT_INPUT:
chn = (cmd == SNDCTL_DSP_HALT_OUTPUT) ? wrch : rdch;
if (chn == NULL)
ret = EINVAL;
else {
CHN_LOCK(chn);
chn_abort(chn);
CHN_UNLOCK(chn);
}
break;
case SNDCTL_DSP_LOW_WATER:
/*
* Set the number of bytes required to attract attention by
* select/poll.
*/
if (wrch != NULL) {
CHN_LOCK(wrch);
wrch->lw = (*arg_i > 1) ? *arg_i : 1;
CHN_UNLOCK(wrch);
}
if (rdch != NULL) {
CHN_LOCK(rdch);
rdch->lw = (*arg_i > 1) ? *arg_i : 1;
CHN_UNLOCK(rdch);
}
break;
case SNDCTL_DSP_GETERROR:
/*
* OSSv4 docs: "All errors and counters will automatically be
* cleared to zeroes after the call so each call will return only
* the errors that occurred after the previous invocation. ... The
* play_underruns and rec_overrun fields are the only usefull fields
* returned by OSS 4.0."
*/
{
audio_errinfo *ei = (audio_errinfo *)arg;
bzero((void *)ei, sizeof(*ei));
if (wrch != NULL) {
CHN_LOCK(wrch);
ei->play_underruns = wrch->xruns;
wrch->xruns = 0;
CHN_UNLOCK(wrch);
}
if (rdch != NULL) {
CHN_LOCK(rdch);
ei->rec_overruns = rdch->xruns;
rdch->xruns = 0;
CHN_UNLOCK(rdch);
}
}
break;
case SNDCTL_DSP_SYNCGROUP:
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_syncgroup(wrch, rdch, (oss_syncgroup *)arg);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_SYNCSTART:
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_syncstart(*arg_i);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_POLICY:
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_policy(wrch, rdch, *arg_i);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_COOKEDMODE:
PCM_ACQUIRE_QUICK(d);
if (!(dsp_get_flags(i_dev) & SD_F_BITPERFECT))
ret = dsp_oss_cookedmode(wrch, rdch, *arg_i);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_GET_CHNORDER:
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_getchnorder(wrch, rdch, (unsigned long long *)arg);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_SET_CHNORDER:
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_setchnorder(wrch, rdch, (unsigned long long *)arg);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_GETCHANNELMASK: /* XXX vlc */
PCM_ACQUIRE_QUICK(d);
ret = dsp_oss_getchannelmask(wrch, rdch, (int *)arg);
PCM_RELEASE_QUICK(d);
break;
case SNDCTL_DSP_BIND_CHANNEL: /* XXX what?!? */
ret = EINVAL;
break;
#ifdef OSSV4_EXPERIMENT
/*
* XXX The following ioctls are not yet supported and just return
* EINVAL.
*/
case SNDCTL_DSP_GETOPEAKS:
case SNDCTL_DSP_GETIPEAKS:
chn = (cmd == SNDCTL_DSP_GETOPEAKS) ? wrch : rdch;
if (chn == NULL)
ret = EINVAL;
else {
oss_peaks_t *op = (oss_peaks_t *)arg;
int lpeak, rpeak;
CHN_LOCK(chn);
ret = chn_getpeaks(chn, &lpeak, &rpeak);
if (ret == -1)
ret = EINVAL;
else {
(*op)[0] = lpeak;
(*op)[1] = rpeak;
}
CHN_UNLOCK(chn);
}
break;
/*
* XXX Once implemented, revisit this for proper cv protection
* (if necessary).
*/
case SNDCTL_GETLABEL:
ret = dsp_oss_getlabel(wrch, rdch, (oss_label_t *)arg);
break;
case SNDCTL_SETLABEL:
ret = dsp_oss_setlabel(wrch, rdch, (oss_label_t *)arg);
break;
case SNDCTL_GETSONG:
ret = dsp_oss_getsong(wrch, rdch, (oss_longname_t *)arg);
break;
case SNDCTL_SETSONG:
ret = dsp_oss_setsong(wrch, rdch, (oss_longname_t *)arg);
break;
case SNDCTL_SETNAME:
ret = dsp_oss_setname(wrch, rdch, (oss_longname_t *)arg);
break;
#if 0
/**
* @note The S/PDIF interface ioctls, @c SNDCTL_DSP_READCTL and
* @c SNDCTL_DSP_WRITECTL have been omitted at the suggestion of
* 4Front Technologies.
*/
case SNDCTL_DSP_READCTL:
case SNDCTL_DSP_WRITECTL:
ret = EINVAL;
break;
#endif /* !0 (explicitly omitted ioctls) */
#endif /* !OSSV4_EXPERIMENT */
case SNDCTL_DSP_MAPINBUF:
case SNDCTL_DSP_MAPOUTBUF:
case SNDCTL_DSP_SETSYNCRO:
/* undocumented */
case SNDCTL_DSP_SUBDIVIDE:
case SOUND_PCM_WRITE_FILTER:
case SOUND_PCM_READ_FILTER:
/* dunno what these do, don't sound important */
default:
DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
ret = EINVAL;
break;
}
PCM_GIANT_LEAVE(d);
return (ret);
}
static int
dsp_poll(struct cdev *i_dev, int events, struct thread *td)
{
struct snddev_info *d;
struct pcm_channel *wrch, *rdch;
int ret, e;
d = dsp_get_info(i_dev);
if (!DSP_REGISTERED(d, i_dev))
return (EBADF);
PCM_GIANT_ENTER(d);
wrch = NULL;
rdch = NULL;
ret = 0;
getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
if (wrch != NULL && !(wrch->flags & CHN_F_DEAD)) {
e = (events & (POLLOUT | POLLWRNORM));
if (e)
ret |= chn_poll(wrch, e, td);
}
if (rdch != NULL && !(rdch->flags & CHN_F_DEAD)) {
e = (events & (POLLIN | POLLRDNORM));
if (e)
ret |= chn_poll(rdch, e, td);
}
relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
PCM_GIANT_LEAVE(d);
return (ret);
}
static int
dsp_mmap(struct cdev *i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
{
struct snddev_info *d;
struct pcm_channel *wrch, *rdch, *c;
/*
* Reject PROT_EXEC by default. It just doesn't makes sense.
* Unfortunately, we have to give up this one due to linux_mmap
* changes.
*
* http://lists.freebsd.org/pipermail/freebsd-emulation/2007-June/003698.html
*
*/
#ifdef SV_ABI_LINUX
if ((nprot & PROT_EXEC) && (dsp_mmap_allow_prot_exec < 0 ||
(dsp_mmap_allow_prot_exec == 0 &&
SV_CURPROC_ABI() != SV_ABI_LINUX)))
#else
if ((nprot & PROT_EXEC) && dsp_mmap_allow_prot_exec < 1)
#endif
return (-1);
d = dsp_get_info(i_dev);
if (!DSP_REGISTERED(d, i_dev))
return (-1);
PCM_GIANT_ENTER(d);
getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
/*
* XXX The linux api uses the nprot to select read/write buffer
* our vm system doesn't allow this, so force write buffer.
*
* This is just a quack to fool full-duplex mmap, so that at
* least playback _or_ recording works. If you really got the
* urge to make _both_ work at the same time, avoid O_RDWR.
* Just open each direction separately and mmap() it.
*
* Failure is not an option due to INVARIANTS check within
* device_pager.c, which means, we have to give up one over
* another.
*/
c = (wrch != NULL) ? wrch : rdch;
if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
offset >= sndbuf_getsize(c->bufsoft) ||
(wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
(rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
PCM_GIANT_EXIT(d);
return (-1);
}
/* XXX full-duplex quack. */
if (wrch != NULL)
wrch->flags |= CHN_F_MMAP;
if (rdch != NULL)
rdch->flags |= CHN_F_MMAP;
*paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset));
relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR);
PCM_GIANT_LEAVE(d);
return (0);
}
/* So much for dev_stdclone() */
static int
dsp_stdclone(char *name, char *namep, char *sep, int use_sep, int *u, int *c)
{
size_t len;
len = strlen(namep);
if (bcmp(name, namep, len) != 0)
return (ENODEV);
name += len;
if (isdigit(*name) == 0)
return (ENODEV);
len = strlen(sep);
if (*name == '0' && !(name[1] == '\0' || bcmp(name + 1, sep, len) == 0))
return (ENODEV);
for (*u = 0; isdigit(*name) != 0; name++) {
*u *= 10;
*u += *name - '0';
if (*u > dsp_umax)
return (ENODEV);
}
if (*name == '\0')
return ((use_sep == 0) ? 0 : ENODEV);
if (bcmp(name, sep, len) != 0 || isdigit(name[len]) == 0)
return (ENODEV);
name += len;
if (*name == '0' && name[1] != '\0')
return (ENODEV);
for (*c = 0; isdigit(*name) != 0; name++) {
*c *= 10;
*c += *name - '0';
if (*c > dsp_cmax)
return (ENODEV);
}
if (*name != '\0')
return (ENODEV);
return (0);
}
static void
dsp_clone(void *arg,
#if __FreeBSD_version >= 600034
struct ucred *cred,
#endif
char *name, int namelen, struct cdev **dev)
{
struct snddev_info *d;
struct snd_clone_entry *ce;
struct pcm_channel *c;
int i, unit, udcmask, cunit, devtype, devhw, devcmax, tumax;
char *devname, *devcmp, *devsep;
KASSERT(dsp_umax >= 0 && dsp_cmax >= 0, ("Uninitialized unit!"));
if (*dev != NULL)
return;
unit = -1;
cunit = -1;
devtype = -1;
devhw = 0;
devcmax = -1;
tumax = -1;
devname = NULL;
devsep = NULL;
for (i = 0; unit == -1 &&
i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
devtype = dsp_cdevs[i].type;
devcmp = dsp_cdevs[i].name;
devsep = dsp_cdevs[i].sep;
devname = dsp_cdevs[i].alias;
if (devname == NULL)
devname = devcmp;
devhw = dsp_cdevs[i].hw;
devcmax = dsp_cdevs[i].max - 1;
if (strcmp(name, devcmp) == 0)
unit = snd_unit;
else if (dsp_stdclone(name, devcmp, devsep,
dsp_cdevs[i].use_sep, &unit, &cunit) != 0) {
unit = -1;
cunit = -1;
}
}
d = devclass_get_softc(pcm_devclass, unit);
if (!PCM_REGISTERED(d) || d->clones == NULL)
return;
/* XXX Need Giant magic entry ??? */
PCM_LOCK(d);
if (snd_clone_disabled(d->clones)) {
PCM_UNLOCK(d);
return;
}
PCM_WAIT(d);
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
udcmask = snd_u2unit(unit) | snd_d2unit(devtype);
if (devhw != 0) {
KASSERT(devcmax <= dsp_cmax,
("overflow: devcmax=%d, dsp_cmax=%d", devcmax, dsp_cmax));
if (cunit > devcmax) {
PCM_RELEASE_QUICK(d);
return;
}
udcmask |= snd_c2unit(cunit);
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->unit != udcmask) {
CHN_UNLOCK(c);
continue;
}
CHN_UNLOCK(c);
udcmask &= ~snd_c2unit(cunit);
/*
* Temporarily increase clone maxunit to overcome
* vchan flexibility.
*
* # sysctl dev.pcm.0.play.vchans=256
* dev.pcm.0.play.vchans: 1 -> 256
* # cat /dev/zero > /dev/dsp0.vp255 &
* [1] 17296
* # sysctl dev.pcm.0.play.vchans=0
* dev.pcm.0.play.vchans: 256 -> 1
* # fg
* [1] + running cat /dev/zero > /dev/dsp0.vp255
* ^C
* # cat /dev/zero > /dev/dsp0.vp255
* zsh: operation not supported: /dev/dsp0.vp255
*/
tumax = snd_clone_getmaxunit(d->clones);
if (cunit > tumax)
snd_clone_setmaxunit(d->clones, cunit);
else
tumax = -1;
goto dsp_clone_alloc;
}
/*
* Ok, so we're requesting unallocated vchan, but still
* within maximum vchan limit.
*/
if (((devtype == SND_DEV_DSPHW_VPLAY && d->pvchancount > 0) ||
(devtype == SND_DEV_DSPHW_VREC && d->rvchancount > 0)) &&
cunit < snd_maxautovchans) {
udcmask &= ~snd_c2unit(cunit);
tumax = snd_clone_getmaxunit(d->clones);
if (cunit > tumax)
snd_clone_setmaxunit(d->clones, cunit);
else
tumax = -1;
goto dsp_clone_alloc;
}
PCM_RELEASE_QUICK(d);
return;
}
dsp_clone_alloc:
ce = snd_clone_alloc(d->clones, dev, &cunit, udcmask);
if (tumax != -1)
snd_clone_setmaxunit(d->clones, tumax);
if (ce != NULL) {
udcmask |= snd_c2unit(cunit);
*dev = make_dev(&dsp_cdevsw, PCMMINOR(udcmask),
UID_ROOT, GID_WHEEL, 0666, "%s%d%s%d",
devname, unit, devsep, cunit);
snd_clone_register(ce, *dev);
}
PCM_RELEASE_QUICK(d);
if (*dev != NULL)
dev_ref(*dev);
}
static void
dsp_sysinit(void *p)
{
if (dsp_ehtag != NULL)
return;
/* initialize unit numbering */
snd_unit_init();
dsp_umax = PCMMAXUNIT;
dsp_cmax = PCMMAXCHAN;
dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000);
}
static void
dsp_sysuninit(void *p)
{
if (dsp_ehtag == NULL)
return;
EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag);
dsp_ehtag = NULL;
}
SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
char *
dsp_unit2name(char *buf, size_t len, int unit)
{
int i, dtype;
KASSERT(buf != NULL && len != 0,
("bogus buf=%p len=%ju", buf, (uintmax_t)len));
dtype = snd_unit2d(unit);
for (i = 0; i < (sizeof(dsp_cdevs) / sizeof(dsp_cdevs[0])); i++) {
if (dtype != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
continue;
snprintf(buf, len, "%s%d%s%d", dsp_cdevs[i].name,
snd_unit2u(unit), dsp_cdevs[i].sep, snd_unit2c(unit));
return (buf);
}
return (NULL);
}
/**
* @brief Handler for SNDCTL_AUDIOINFO.
*
* Gathers information about the audio device specified in ai->dev. If
* ai->dev == -1, then this function gathers information about the current
* device. If the call comes in on a non-audio device and ai->dev == -1,
* return EINVAL.
*
* This routine is supposed to go practically straight to the hardware,
* getting capabilities directly from the sound card driver, side-stepping
* the intermediate channel interface.
*
* Note, however, that the usefulness of this command is significantly
* decreased when requesting info about any device other than the one serving
* the request. While each snddev_channel refers to a specific device node,
* the converse is *not* true. Currently, when a sound device node is opened,
* the sound subsystem scans for an available audio channel (or channels, if
* opened in read+write) and then assigns them to the si_drv[12] private
* data fields. As a result, any information returned linking a channel to
* a specific character device isn't necessarily accurate.
*
* @note
* Calling threads must not hold any snddev_info or pcm_channel locks.
*
* @param dev device on which the ioctl was issued
* @param ai ioctl request data container
*
* @retval 0 success
* @retval EINVAL ai->dev specifies an invalid device
*
* @todo Verify correctness of Doxygen tags. ;)
*/
int
dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
{
struct pcmchan_caps *caps;
struct pcm_channel *ch;
struct snddev_info *d;
uint32_t fmts;
int i, nchan, *rates, minch, maxch;
char *devname, buf[CHN_NAMELEN];
/*
* If probing the device that received the ioctl, make sure it's a
* DSP device. (Users may use this ioctl with /dev/mixer and
* /dev/midi.)
*/
if (ai->dev == -1 && i_dev->si_devsw != &dsp_cdevsw)
return (EINVAL);
ch = NULL;
devname = NULL;
nchan = 0;
bzero(buf, sizeof(buf));
/*
* Search for the requested audio device (channel). Start by
* iterating over pcm devices.
*/
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;
/* XXX Need Giant magic entry ??? */
/* See the note in function docblock */
PCM_UNLOCKASSERT(d);
PCM_LOCK(d);
CHN_FOREACH(ch, d, channels.pcm) {
CHN_UNLOCKASSERT(ch);
CHN_LOCK(ch);
if (ai->dev == -1) {
if (DSP_REGISTERED(d, i_dev) &&
(ch == PCM_RDCH(i_dev) || /* record ch */
ch == PCM_WRCH(i_dev))) { /* playback ch */
devname = dsp_unit2name(buf,
sizeof(buf), ch->unit);
}
} else if (ai->dev == nchan) {
devname = dsp_unit2name(buf, sizeof(buf),
ch->unit);
}
if (devname != NULL)
break;
CHN_UNLOCK(ch);
++nchan;
}
if (devname != NULL) {
/*
* At this point, the following synchronization stuff
* has happened:
* - a specific PCM device is locked.
* - a specific audio channel has been locked, so be
* sure to unlock when exiting;
*/
caps = chn_getcaps(ch);
/*
* With all handles collected, zero out the user's
* container and begin filling in its fields.
*/
bzero((void *)ai, sizeof(oss_audioinfo));
ai->dev = nchan;
strlcpy(ai->name, ch->name, sizeof(ai->name));
if ((ch->flags & CHN_F_BUSY) == 0)
ai->busy = 0;
else
ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
/**
* @note
* @c cmd - OSSv4 docs: "Only supported under Linux at
* this moment." Cop-out, I know, but I'll save
* running around in the process table for later.
* Is there a risk of leaking information?
*/
ai->pid = ch->pid;
/*
* These flags stolen from SNDCTL_DSP_GETCAPS handler.
* Note, however, that a single channel operates in
* only one direction, so PCM_CAP_DUPLEX is out.
*/
/**
* @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
* these in pcmchan::caps?
*/
ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
/*
* Collect formats supported @b natively by the
* device. Also determine min/max channels. (I.e.,
* mono, stereo, or both?)
*
* If any channel is stereo, maxch = 2;
* if all channels are stereo, minch = 2, too;
* if any channel is mono, minch = 1;
* and if all channels are mono, maxch = 1.
*/
minch = 0;
maxch = 0;
fmts = 0;
for (i = 0; caps->fmtlist[i]; i++) {
fmts |= caps->fmtlist[i];
if (AFMT_CHANNEL(caps->fmtlist[i]) > 1) {
minch = (minch == 0) ? 2 : minch;
maxch = 2;
} else {
minch = 1;
maxch = (maxch == 0) ? 1 : maxch;
}
}
if (ch->direction == PCMDIR_PLAY)
ai->oformats = fmts;
else
ai->iformats = fmts;
/**
* @note
* @c magic - OSSv4 docs: "Reserved for internal use
* by OSS."
*
* @par
* @c card_number - OSSv4 docs: "Number of the sound
* card where this device belongs or -1 if this
* information is not available. Applications
* should normally not use this field for any
* purpose."
*/
ai->card_number = -1;
/**
* @todo @c song_name - depends first on
* SNDCTL_[GS]ETSONG @todo @c label - depends
* on SNDCTL_[GS]ETLABEL
* @todo @c port_number - routing information?
*/
ai->port_number = -1;
ai->mixer_dev = (d->mixer_dev != NULL) ? PCMUNIT(d->mixer_dev) : -1;
/**
* @note
* @c real_device - OSSv4 docs: "Obsolete."
*/
ai->real_device = -1;
strlcpy(ai->devnode, "/dev/", sizeof(ai->devnode));
strlcat(ai->devnode, devname, sizeof(ai->devnode));
ai->enabled = device_is_attached(d->dev) ? 1 : 0;
/**
* @note
* @c flags - OSSv4 docs: "Reserved for future use."
*
* @note
* @c binding - OSSv4 docs: "Reserved for future use."
*
* @todo @c handle - haven't decided how to generate
* this yet; bus, vendor, device IDs?
*/
ai->min_rate = caps->minspeed;
ai->max_rate = caps->maxspeed;
ai->min_channels = minch;
ai->max_channels = maxch;
ai->nrates = chn_getrates(ch, &rates);
if (ai->nrates > OSS_MAX_SAMPLE_RATES)
ai->nrates = OSS_MAX_SAMPLE_RATES;
for (i = 0; i < ai->nrates; i++)
ai->rates[i] = rates[i];
ai->next_play_engine = 0;
ai->next_rec_engine = 0;
CHN_UNLOCK(ch);
}
PCM_UNLOCK(d);
if (devname != NULL)
return (0);
}
/* Exhausted the search -- nothing is locked, so return. */
return (EINVAL);
}
/**
* @brief Assigns a PCM channel to a sync group.
*
* Sync groups are used to enable audio operations on multiple devices
* simultaneously. They may be used with any number of devices and may
* span across applications. Devices are added to groups with
* the SNDCTL_DSP_SYNCGROUP ioctl, and operations are triggered with the
* SNDCTL_DSP_SYNCSTART ioctl.
*
* If the @c id field of the @c group parameter is set to zero, then a new
* sync group is created. Otherwise, wrch and rdch (if set) are added to
* the group specified.
*
* @todo As far as memory allocation, should we assume that things are
* okay and allocate with M_WAITOK before acquiring channel locks,
* freeing later if not?
*
* @param wrch output channel associated w/ device (if any)
* @param rdch input channel associated w/ device (if any)
* @param group Sync group parameters
*
* @retval 0 success
* @retval non-zero error to be propagated upstream
*/
static int
dsp_oss_syncgroup(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_syncgroup *group)
{
struct pcmchan_syncmember *smrd, *smwr;
struct pcmchan_syncgroup *sg;
int ret, sg_ids[3];
smrd = NULL;
smwr = NULL;
sg = NULL;
ret = 0;
/*
* Free_unr() may sleep, so store released syncgroup IDs until after
* all locks are released.
*/
sg_ids[0] = sg_ids[1] = sg_ids[2] = 0;
PCM_SG_LOCK();
/*
* - Insert channel(s) into group's member list.
* - Set CHN_F_NOTRIGGER on channel(s).
* - Stop channel(s).
*/
/*
* If device's channels are already mapped to a group, unmap them.
*/
if (wrch) {
CHN_LOCK(wrch);
sg_ids[0] = chn_syncdestroy(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
sg_ids[1] = chn_syncdestroy(rdch);
}
/*
* Verify that mode matches character device properites.
* - Bail if PCM_ENABLE_OUTPUT && wrch == NULL.
* - Bail if PCM_ENABLE_INPUT && rdch == NULL.
*/
if (((wrch == NULL) && (group->mode & PCM_ENABLE_OUTPUT)) ||
((rdch == NULL) && (group->mode & PCM_ENABLE_INPUT))) {
ret = EINVAL;
goto out;
}
/*
* An id of zero indicates the user wants to create a new
* syncgroup.
*/
if (group->id == 0) {
sg = (struct pcmchan_syncgroup *)malloc(sizeof(*sg), M_DEVBUF, M_NOWAIT);
if (sg != NULL) {
SLIST_INIT(&sg->members);
sg->id = alloc_unr(pcmsg_unrhdr);
group->id = sg->id;
SLIST_INSERT_HEAD(&snd_pcm_syncgroups, sg, link);
} else
ret = ENOMEM;
} else {
SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
if (sg->id == group->id)
break;
}
if (sg == NULL)
ret = EINVAL;
}
/* Couldn't create or find a syncgroup. Fail. */
if (sg == NULL)
goto out;
/*
* Allocate a syncmember, assign it and a channel together, and
* insert into syncgroup.
*/
if (group->mode & PCM_ENABLE_INPUT) {
smrd = (struct pcmchan_syncmember *)malloc(sizeof(*smrd), M_DEVBUF, M_NOWAIT);
if (smrd == NULL) {
ret = ENOMEM;
goto out;
}
SLIST_INSERT_HEAD(&sg->members, smrd, link);
smrd->parent = sg;
smrd->ch = rdch;
chn_abort(rdch);
rdch->flags |= CHN_F_NOTRIGGER;
rdch->sm = smrd;
}
if (group->mode & PCM_ENABLE_OUTPUT) {
smwr = (struct pcmchan_syncmember *)malloc(sizeof(*smwr), M_DEVBUF, M_NOWAIT);
if (smwr == NULL) {
ret = ENOMEM;
goto out;
}
SLIST_INSERT_HEAD(&sg->members, smwr, link);
smwr->parent = sg;
smwr->ch = wrch;
chn_abort(wrch);
wrch->flags |= CHN_F_NOTRIGGER;
wrch->sm = smwr;
}
out:
if (ret != 0) {
if (smrd != NULL)
free(smrd, M_DEVBUF);
if ((sg != NULL) && SLIST_EMPTY(&sg->members)) {
sg_ids[2] = sg->id;
SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
free(sg, M_DEVBUF);
}
if (wrch)
wrch->sm = NULL;
if (rdch)
rdch->sm = NULL;
}
if (wrch)
CHN_UNLOCK(wrch);
if (rdch)
CHN_UNLOCK(rdch);
PCM_SG_UNLOCK();
if (sg_ids[0])
free_unr(pcmsg_unrhdr, sg_ids[0]);
if (sg_ids[1])
free_unr(pcmsg_unrhdr, sg_ids[1]);
if (sg_ids[2])
free_unr(pcmsg_unrhdr, sg_ids[2]);
return (ret);
}
/**
* @brief Launch a sync group into action
*
* Sync groups are established via SNDCTL_DSP_SYNCGROUP. This function
* iterates over all members, triggering them along the way.
*
* @note Caller must not hold any channel locks.
*
* @param sg_id sync group identifier
*
* @retval 0 success
* @retval non-zero error worthy of propagating upstream to user
*/
static int
dsp_oss_syncstart(int sg_id)
{
struct pcmchan_syncmember *sm, *sm_tmp;
struct pcmchan_syncgroup *sg;
struct pcm_channel *c;
int ret, needlocks;
/* Get the synclists lock */
PCM_SG_LOCK();
do {
ret = 0;
needlocks = 0;
/* Search for syncgroup by ID */
SLIST_FOREACH(sg, &snd_pcm_syncgroups, link) {
if (sg->id == sg_id)
break;
}
/* Return EINVAL if not found */
if (sg == NULL) {
ret = EINVAL;
break;
}
/* Any removals resulting in an empty group should've handled this */
KASSERT(!SLIST_EMPTY(&sg->members), ("found empty syncgroup"));
/*
* Attempt to lock all member channels - if any are already
* locked, unlock those acquired, sleep for a bit, and try
* again.
*/
SLIST_FOREACH(sm, &sg->members, link) {
if (CHN_TRYLOCK(sm->ch) == 0) {
int timo = hz * 5/1000;
if (timo < 1)
timo = 1;
/* Release all locked channels so far, retry */
SLIST_FOREACH(sm_tmp, &sg->members, link) {
/* sm is the member already locked */
if (sm == sm_tmp)
break;
CHN_UNLOCK(sm_tmp->ch);
}
/** @todo Is PRIBIO correct/ */
ret = msleep(sm, &snd_pcm_syncgroups_mtx,
PRIBIO | PCATCH, "pcmsg", timo);
if (ret == EINTR || ret == ERESTART)
break;
needlocks = 1;
ret = 0; /* Assumes ret == EAGAIN... */
}
}
} while (needlocks && ret == 0);
/* Proceed only if no errors encountered. */
if (ret == 0) {
/* Launch channels */
while ((sm = SLIST_FIRST(&sg->members)) != NULL) {
SLIST_REMOVE_HEAD(&sg->members, link);
c = sm->ch;
c->sm = NULL;
chn_start(c, 1);
c->flags &= ~CHN_F_NOTRIGGER;
CHN_UNLOCK(c);
free(sm, M_DEVBUF);
}
SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
free(sg, M_DEVBUF);
}
PCM_SG_UNLOCK();
/*
* Free_unr() may sleep, so be sure to give up the syncgroup lock
* first.
*/
if (ret == 0)
free_unr(pcmsg_unrhdr, sg_id);
return (ret);
}
/**
* @brief Handler for SNDCTL_DSP_POLICY
*
* The SNDCTL_DSP_POLICY ioctl is a simpler interface to control fragment
* size and count like with SNDCTL_DSP_SETFRAGMENT. Instead of the user
* specifying those two parameters, s/he simply selects a number from 0..10
* which corresponds to a buffer size. Smaller numbers request smaller
* buffers with lower latencies (at greater overhead from more frequent
* interrupts), while greater numbers behave in the opposite manner.
*
* The 4Front spec states that a value of 5 should be the default. However,
* this implementation deviates slightly by using a linear scale without
* consulting drivers. I.e., even though drivers may have different default
* buffer sizes, a policy argument of 5 will have the same result across
* all drivers.
*
* See http://manuals.opensound.com/developer/SNDCTL_DSP_POLICY.html for
* more information.
*
* @todo When SNDCTL_DSP_COOKEDMODE is supported, it'll be necessary to
* work with hardware drivers directly.
*
* @note PCM channel arguments must not be locked by caller.
*
* @param wrch Pointer to opened playback channel (optional; may be NULL)
* @param rdch " recording channel (optional; may be NULL)
* @param policy Integer from [0:10]
*
* @retval 0 constant (for now)
*/
static int
dsp_oss_policy(struct pcm_channel *wrch, struct pcm_channel *rdch, int policy)
{
int ret;
if (policy < CHN_POLICY_MIN || policy > CHN_POLICY_MAX)
return (EIO);
/* Default: success */
ret = 0;
if (rdch) {
CHN_LOCK(rdch);
ret = chn_setlatency(rdch, policy);
CHN_UNLOCK(rdch);
}
if (wrch && ret == 0) {
CHN_LOCK(wrch);
ret = chn_setlatency(wrch, policy);
CHN_UNLOCK(wrch);
}
if (ret)
ret = EIO;
return (ret);
}
/**
* @brief Enable or disable "cooked" mode
*
* This is a handler for @c SNDCTL_DSP_COOKEDMODE. When in cooked mode, which
* is the default, the sound system handles rate and format conversions
* automatically (ex: user writing 11025Hz/8 bit/unsigned but card only
* operates with 44100Hz/16bit/signed samples).
*
* Disabling cooked mode is intended for applications wanting to mmap()
* a sound card's buffer space directly, bypassing the FreeBSD 2-stage
* feeder architecture, presumably to gain as much control over audio
* hardware as possible.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_DSP_COOKEDMODE.html
* for more details.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param enabled 0 = raw mode, 1 = cooked mode
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_cookedmode(struct pcm_channel *wrch, struct pcm_channel *rdch, int enabled)
{
/*
* XXX I just don't get it. Why don't they call it
* "BITPERFECT" ~ SNDCTL_DSP_BITPERFECT !?!?.
* This is just plain so confusing, incoherent,
* <insert any non-printable characters here>.
*/
if (!(enabled == 1 || enabled == 0))
return (EINVAL);
/*
* I won't give in. I'm inverting its logic here and now.
* Brag all you want, but "BITPERFECT" should be the better
* term here.
*/
enabled ^= 0x00000001;
if (wrch != NULL) {
CHN_LOCK(wrch);
wrch->flags &= ~CHN_F_BITPERFECT;
wrch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
CHN_UNLOCK(wrch);
}
if (rdch != NULL) {
CHN_LOCK(rdch);
rdch->flags &= ~CHN_F_BITPERFECT;
rdch->flags |= (enabled != 0) ? CHN_F_BITPERFECT : 0x00000000;
CHN_UNLOCK(rdch);
}
return (0);
}
/**
* @brief Retrieve channel interleaving order
*
* This is the handler for @c SNDCTL_DSP_GET_CHNORDER.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_DSP_GET_CHNORDER.html
* for more details.
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support SNDCTL_DSP_GET_CHNORDER.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param map channel map (result will be stored there)
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_getchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
{
struct pcm_channel *ch;
int ret;
ch = (wrch != NULL) ? wrch : rdch;
if (ch != NULL) {
CHN_LOCK(ch);
ret = chn_oss_getorder(ch, map);
CHN_UNLOCK(ch);
} else
ret = EINVAL;
return (ret);
}
/**
* @brief Specify channel interleaving order
*
* This is the handler for @c SNDCTL_DSP_SET_CHNORDER.
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support @c SNDCTL_DSP_SET_CHNORDER.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param map channel map
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_setchnorder(struct pcm_channel *wrch, struct pcm_channel *rdch, unsigned long long *map)
{
int ret;
ret = 0;
if (wrch != NULL) {
CHN_LOCK(wrch);
ret = chn_oss_setorder(wrch, map);
CHN_UNLOCK(wrch);
}
if (ret == 0 && rdch != NULL) {
CHN_LOCK(rdch);
ret = chn_oss_setorder(rdch, map);
CHN_UNLOCK(rdch);
}
return (ret);
}
static int
dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
int *mask)
{
struct pcm_channel *ch;
uint32_t chnmask;
int ret;
chnmask = 0;
ch = (wrch != NULL) ? wrch : rdch;
if (ch != NULL) {
CHN_LOCK(ch);
ret = chn_oss_getmask(ch, &chnmask);
CHN_UNLOCK(ch);
} else
ret = EINVAL;
if (ret == 0)
*mask = chnmask;
return (ret);
}
#ifdef OSSV4_EXPERIMENT
/**
* @brief Retrieve an audio device's label
*
* This is a handler for the @c SNDCTL_GETLABEL ioctl.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
* for more details.
*
* From Hannu@4Front: "For example ossxmix (just like some HW mixer
* consoles) can show variable "labels" for certain controls. By default
* the application name (say quake) is shown as the label but
* applications may change the labels themselves."
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support @c SNDCTL_GETLABEL.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param label label gets copied here
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_getlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
{
return (EINVAL);
}
/**
* @brief Specify an audio device's label
*
* This is a handler for the @c SNDCTL_SETLABEL ioctl. Please see the
* comments for @c dsp_oss_getlabel immediately above.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_GETLABEL.html
* for more details.
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support SNDCTL_SETLABEL.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param label label gets copied from here
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_setlabel(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_label_t *label)
{
return (EINVAL);
}
/**
* @brief Retrieve name of currently played song
*
* This is a handler for the @c SNDCTL_GETSONG ioctl. Audio players could
* tell the system the name of the currently playing song, which would be
* visible in @c /dev/sndstat.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_GETSONG.html
* for more details.
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support SNDCTL_GETSONG.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param song song name gets copied here
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_getsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
{
return (EINVAL);
}
/**
* @brief Retrieve name of currently played song
*
* This is a handler for the @c SNDCTL_SETSONG ioctl. Audio players could
* tell the system the name of the currently playing song, which would be
* visible in @c /dev/sndstat.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_SETSONG.html
* for more details.
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support SNDCTL_SETSONG.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param song song name gets copied from here
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_setsong(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *song)
{
return (EINVAL);
}
/**
* @brief Rename a device
*
* This is a handler for the @c SNDCTL_SETNAME ioctl.
*
* See @c http://manuals.opensound.com/developer/SNDCTL_SETNAME.html for
* more details.
*
* From Hannu@4Front: "This call is used to change the device name
* reported in /dev/sndstat and ossinfo. So instead of using some generic
* 'OSS loopback audio (MIDI) driver' the device may be given a meaningfull
* name depending on the current context (for example 'OSS virtual wave table
* synth' or 'VoIP link to London')."
*
* @note As the ioctl definition is still under construction, FreeBSD
* does not currently support SNDCTL_SETNAME.
*
* @param wrch playback channel (optional; may be NULL)
* @param rdch recording channel (optional; may be NULL)
* @param name new device name gets copied from here
*
* @retval EINVAL Operation not yet supported.
*/
static int
dsp_oss_setname(struct pcm_channel *wrch, struct pcm_channel *rdch, oss_longname_t *name)
{
return (EINVAL);
}
#endif /* !OSSV4_EXPERIMENT */
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