/*- * Copyright (c) 1999 Cameron Grant * (C) 1997 Luigi Rizzo (luigi@iet.unipi.it) * 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 #include #include #include #include #include "feeder_if.h" SND_DECLARE_FILE("$FreeBSD: src/sys/dev/sound/pcm/sound.c,v 1.98 2006/02/05 17:47:26 netchild Exp $"); devclass_t pcm_devclass; int pcm_veto_load = 1; #ifdef USING_DEVFS int snd_unit = 0; TUNABLE_INT("hw.snd.unit", &snd_unit); #endif int snd_maxautovchans = 0; TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans); SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver"); static int sndstat_prepare_pcm(struct sbuf *s, device_t dev, int verbose); struct sysctl_ctx_list * snd_sysctl_tree(device_t dev) { struct snddev_info *d = device_get_softc(dev); return &d->sysctl_tree; } struct sysctl_oid * snd_sysctl_tree_top(device_t dev) { struct snddev_info *d = device_get_softc(dev); return d->sysctl_tree_top; } void * snd_mtxcreate(const char *desc, const char *type) { #ifdef USING_MUTEX struct mtx *m; m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); if (m == NULL) return NULL; mtx_init(m, desc, type, MTX_DEF); return m; #else return (void *)0xcafebabe; #endif } void snd_mtxfree(void *m) { #ifdef USING_MUTEX struct mtx *mtx = m; /* mtx_assert(mtx, MA_OWNED); */ mtx_destroy(mtx); free(mtx, M_DEVBUF); #endif } void snd_mtxassert(void *m) { #ifdef USING_MUTEX #ifdef INVARIANTS struct mtx *mtx = m; mtx_assert(mtx, MA_OWNED); #endif #endif } /* void snd_mtxlock(void *m) { #ifdef USING_MUTEX struct mtx *mtx = m; mtx_lock(mtx); #endif } void snd_mtxunlock(void *m) { #ifdef USING_MUTEX struct mtx *mtx = m; mtx_unlock(mtx); #endif } */ int snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) { #ifdef USING_MUTEX flags &= INTR_MPSAFE; flags |= INTR_TYPE_AV; #else flags = INTR_TYPE_AV; #endif return bus_setup_intr(dev, res, flags, hand, param, cookiep); } #ifndef PCM_DEBUG_MTX void pcm_lock(struct snddev_info *d) { snd_mtxlock(d->lock); } void pcm_unlock(struct snddev_info *d) { snd_mtxunlock(d->lock); } #endif struct pcm_channel * pcm_getfakechan(struct snddev_info *d) { return d->fakechan; } /* return a locked channel */ struct pcm_channel * pcm_chnalloc(struct snddev_info *d, int direction, pid_t pid, int chnum) { struct pcm_channel *c; struct snddev_channel *sce; int err; /* scan for a free channel */ SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if ((c->direction == direction) && !(c->flags & CHN_F_BUSY)) { if (chnum == -1 || c->num == chnum) { c->flags |= CHN_F_BUSY; c->pid = pid; return c; } } CHN_UNLOCK(c); } /* no channel available */ if (direction == PCMDIR_PLAY) { if ((d->vchancount > 0) && (d->vchancount < snd_maxautovchans)) { /* try to create a vchan */ SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if ((c->flags & CHN_F_HAS_VCHAN) && !SLIST_EMPTY(&c->children)) { err = vchan_create(c); CHN_UNLOCK(c); if (!err) return pcm_chnalloc(d, direction, pid, -1); else device_printf(d->dev, "vchan_create(%s) == %d\n", c->name, err); } else CHN_UNLOCK(c); } } } return NULL; } /* release a locked channel and unlock it */ int pcm_chnrelease(struct pcm_channel *c) { CHN_LOCKASSERT(c); c->flags &= ~CHN_F_BUSY; c->pid = -1; CHN_UNLOCK(c); return 0; } int pcm_chnref(struct pcm_channel *c, int ref) { int r; CHN_LOCKASSERT(c); c->refcount += ref; r = c->refcount; return r; } int pcm_inprog(struct snddev_info *d, int delta) { int r; if (delta == 0) return d->inprog; /* backtrace(); */ pcm_lock(d); d->inprog += delta; r = d->inprog; pcm_unlock(d); return r; } static void pcm_setmaxautovchans(struct snddev_info *d, int num) { struct pcm_channel *c, *ch; struct snddev_channel *sce; int err, done; /* * XXX WOAH... NEED SUPER CLEANUP!!! * Robust, yet confusing. Understanding these will * cause your brain spinning like a Doki Doki Dynamo. */ if (num > 0 && d->vchancount == 0) { SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if ((c->direction == PCMDIR_PLAY) && !(c->flags & CHN_F_BUSY) && SLIST_EMPTY(&c->children)) { c->flags |= CHN_F_BUSY; err = vchan_create(c); if (err) { c->flags &= ~CHN_F_BUSY; device_printf(d->dev, "vchan_create(%s) == %d\n", c->name, err); } CHN_UNLOCK(c); return; } CHN_UNLOCK(c); } return; } if (num == 0 && d->vchancount > 0) { /* * XXX Keep retrying... */ for (done = 0; done < 1024; done++) { ch = NULL; SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if (c->direction == PCMDIR_PLAY && !(c->flags & CHN_F_BUSY) && (c->flags & CHN_F_VIRTUAL)) { ch = c; break; } CHN_UNLOCK(c); } if (ch != NULL) { CHN_UNLOCK(ch); snd_mtxlock(d->lock); err = vchan_destroy(ch); if (err) device_printf(d->dev, "vchan_destroy(%s) == %d\n", ch->name, err); snd_mtxunlock(d->lock); } else return; } return; } } #ifdef USING_DEVFS static int sysctl_hw_snd_unit(SYSCTL_HANDLER_ARGS) { struct snddev_info *d; int error, unit; unit = snd_unit; error = sysctl_handle_int(oidp, &unit, sizeof(unit), req); if (error == 0 && req->newptr != NULL) { if (unit < 0 || unit >= devclass_get_maxunit(pcm_devclass)) return EINVAL; d = devclass_get_softc(pcm_devclass, unit); if (d == NULL || SLIST_EMPTY(&d->channels)) return EINVAL; snd_unit = unit; } return (error); } SYSCTL_PROC(_hw_snd, OID_AUTO, unit, CTLTYPE_INT | CTLFLAG_RW, 0, sizeof(int), sysctl_hw_snd_unit, "I", ""); #endif static int sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) { struct snddev_info *d; int i, v, error; v = snd_maxautovchans; error = sysctl_handle_int(oidp, &v, sizeof(v), req); if (error == 0 && req->newptr != NULL) { if (v < 0 || v >= SND_MAXVCHANS || pcm_devclass == NULL) return EINVAL; if (v != snd_maxautovchans) { for (i = 0; i < devclass_get_maxunit(pcm_devclass); i++) { d = devclass_get_softc(pcm_devclass, i); if (!d) continue; if (d->flags & SD_F_AUTOVCHAN) { if (pcm_inprog(d, 1) == 1) pcm_setmaxautovchans(d, v); pcm_inprog(d, -1); } } } snd_maxautovchans = v; } return (error); } SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW, 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", ""); struct pcm_channel * pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, void *devinfo) { struct pcm_channel *ch; char *dirs; int direction, err, *pnum; switch(dir) { case PCMDIR_PLAY: dirs = "play"; direction = PCMDIR_PLAY; pnum = &d->playcount; break; case PCMDIR_REC: dirs = "record"; direction = PCMDIR_REC; pnum = &d->reccount; break; case PCMDIR_VIRTUAL: dirs = "virtual"; direction = PCMDIR_PLAY; pnum = &d->vchancount; break; default: return NULL; } ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); if (!ch) return NULL; ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK); if (!ch->methods) { free(ch, M_DEVBUF); return NULL; } snd_mtxlock(d->lock); ch->num = (*pnum)++; snd_mtxunlock(d->lock); ch->pid = -1; ch->parentsnddev = d; ch->parentchannel = parent; ch->dev = d->dev; snprintf(ch->name, 32, "%s:%s:%d", device_get_nameunit(ch->dev), dirs, ch->num); err = chn_init(ch, devinfo, dir, direction); if (err) { device_printf(d->dev, "chn_init(%s) failed: err = %d\n", ch->name, err); kobj_delete(ch->methods, M_DEVBUF); free(ch, M_DEVBUF); snd_mtxlock(d->lock); (*pnum)--; snd_mtxunlock(d->lock); return NULL; } return ch; } int pcm_chn_destroy(struct pcm_channel *ch) { struct snddev_info *d; int err; d = ch->parentsnddev; err = chn_kill(ch); if (err) { device_printf(d->dev, "chn_kill(%s) failed, err = %d\n", ch->name, err); return err; } kobj_delete(ch->methods, M_DEVBUF); free(ch, M_DEVBUF); return 0; } int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) { struct snddev_channel *sce, *tmp, *after; int device = device_get_unit(d->dev); /* * Note it's confusing nomenclature. * dev_t * device -> pcm_device * unit -> pcm_channel * channel -> snddev_channel * device_t * unit -> pcm_device */ sce = malloc(sizeof(*sce), M_DEVBUF, M_WAITOK | M_ZERO); if (!sce) { return ENOMEM; } snd_mtxlock(d->lock); sce->channel = ch; sce->chan_num= d->devcount++; if (SLIST_EMPTY(&d->channels)) { SLIST_INSERT_HEAD(&d->channels, sce, link); } else { /* * Micro optimization, channel ordering: * hw,hw,hw,vch,vch,vch,rec */ after = NULL; if (ch->flags & CHN_F_VIRTUAL) { /* virtual channel to the end */ SLIST_FOREACH(tmp, &d->channels, link) { if (tmp->channel->direction == PCMDIR_REC) break; after = tmp; } } else { if (ch->direction == PCMDIR_REC) { SLIST_FOREACH(tmp, &d->channels, link) { after = tmp; } } else { SLIST_FOREACH(tmp, &d->channels, link) { if (tmp->channel->direction == PCMDIR_REC) break; if (!(tmp->channel->flags & CHN_F_VIRTUAL)) after = tmp; } } } if (after == NULL) { SLIST_INSERT_HEAD(&d->channels, sce, link); } else { SLIST_INSERT_AFTER(after, sce, link); } } snd_mtxunlock(d->lock); sce->dsp_devt= make_dev(&dsp_cdevsw, PCMMKMINOR(device, SND_DEV_DSP, sce->chan_num), UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", device, sce->chan_num); sce->dspW_devt= make_dev(&dsp_cdevsw, PCMMKMINOR(device, SND_DEV_DSP16, sce->chan_num), UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", device, sce->chan_num); sce->audio_devt= make_dev(&dsp_cdevsw, PCMMKMINOR(device, SND_DEV_AUDIO, sce->chan_num), UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", device, sce->chan_num); if (ch->direction == PCMDIR_REC) sce->dspr_devt = make_dev(&dsp_cdevsw, PCMMKMINOR(device, SND_DEV_DSPREC, sce->chan_num), UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", device, sce->chan_num); return 0; } int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) { struct snddev_channel *sce; #if 0 int ourlock; ourlock = 0; if (!mtx_owned(d->lock)) { snd_mtxlock(d->lock); ourlock = 1; } #endif SLIST_FOREACH(sce, &d->channels, link) { if (sce->channel == ch) goto gotit; } #if 0 if (ourlock) snd_mtxunlock(d->lock); #endif return EINVAL; gotit: SLIST_REMOVE(&d->channels, sce, snddev_channel, link); if (ch->flags & CHN_F_VIRTUAL) d->vchancount--; else if (ch->direction == PCMDIR_REC) d->reccount--; else d->playcount--; #if 0 if (ourlock) snd_mtxunlock(d->lock); #endif free(sce, M_DEVBUF); return 0; } int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) { struct snddev_info *d = device_get_softc(dev); struct pcm_channel *ch; int err; ch = pcm_chn_create(d, NULL, cls, dir, devinfo); if (!ch) { device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", cls->name, dir, devinfo); return ENODEV; } err = pcm_chn_add(d, ch); if (err) { device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", ch->name, err); pcm_chn_destroy(ch); return err; } CHN_LOCK(ch); if (snd_maxautovchans > 0 && (d->flags & SD_F_AUTOVCHAN) && ch->direction == PCMDIR_PLAY && d->vchancount == 0) { ch->flags |= CHN_F_BUSY; err = vchan_create(ch); if (err) { ch->flags &= ~CHN_F_BUSY; CHN_UNLOCK(ch); device_printf(d->dev, "vchan_create(%s) == %d\n", ch->name, err); return err; } } CHN_UNLOCK(ch); return err; } static int pcm_killchan(device_t dev) { struct snddev_info *d = device_get_softc(dev); struct snddev_channel *sce; struct pcm_channel *ch; int error = 0; sce = SLIST_FIRST(&d->channels); ch = sce->channel; error = pcm_chn_remove(d, sce->channel); if (error) return (error); return (pcm_chn_destroy(ch)); } int pcm_setstatus(device_t dev, char *str) { struct snddev_info *d = device_get_softc(dev); snd_mtxlock(d->lock); strlcpy(d->status, str, SND_STATUSLEN); snd_mtxunlock(d->lock); return 0; } u_int32_t pcm_getflags(device_t dev) { struct snddev_info *d = device_get_softc(dev); return d->flags; } void pcm_setflags(device_t dev, u_int32_t val) { struct snddev_info *d = device_get_softc(dev); d->flags = val; } void * pcm_getdevinfo(device_t dev) { struct snddev_info *d = device_get_softc(dev); return d->devinfo; } unsigned int pcm_getbuffersize(device_t dev, unsigned int min, unsigned int deflt, unsigned int max) { struct snddev_info *d = device_get_softc(dev); int sz, x; sz = 0; if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { x = sz; RANGE(sz, min, max); if (x != sz) device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, min, max, sz); x = min; while (x < sz) x <<= 1; if (x > sz) x >>= 1; if (x != sz) { device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); sz = x; } } else { sz = deflt; } d->bufsz = sz; return sz; } int pcm_register(device_t dev, void *devinfo, int numplay, int numrec) { struct snddev_info *d = device_get_softc(dev); if (pcm_veto_load) { device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); return EINVAL; } d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); #if 0 /* * d->flags should be cleared by the allocator of the softc. * We cannot clear this field here because several devices set * this flag before calling pcm_register(). */ d->flags = 0; #endif d->dev = dev; d->devinfo = devinfo; d->devcount = 0; d->reccount = 0; d->playcount = 0; d->vchancount = 0; d->inprog = 0; SLIST_INIT(&d->channels); if (((numplay == 0) || (numrec == 0)) && (numplay != numrec)) d->flags |= SD_F_SIMPLEX; d->fakechan = fkchan_setup(dev); chn_init(d->fakechan, NULL, 0, 0); #ifdef SND_DYNSYSCTL sysctl_ctx_init(&d->sysctl_tree); d->sysctl_tree_top = SYSCTL_ADD_NODE(&d->sysctl_tree, SYSCTL_STATIC_CHILDREN(_hw_snd), OID_AUTO, device_get_nameunit(dev), CTLFLAG_RD, 0, ""); if (d->sysctl_tree_top == NULL) { sysctl_ctx_free(&d->sysctl_tree); goto no; } SYSCTL_ADD_INT(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)), OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, ""); #endif if (numplay > 0) { vchan_initsys(dev); d->flags |= SD_F_AUTOVCHAN; } if (d->mixer_dev != NULL && d->mixer_dev->si_drv1 != NULL) ac97_initsys(dev); sndstat_register(dev, d->status, sndstat_prepare_pcm); return 0; no: snd_mtxfree(d->lock); return ENXIO; } int pcm_unregister(device_t dev) { struct snddev_info *d = device_get_softc(dev); struct snddev_channel *sce; struct pcm_channel *ch; if (sndstat_acquire() != 0) { device_printf(dev, "unregister: sndstat busy\n"); return EBUSY; } snd_mtxlock(d->lock); if (d->inprog) { device_printf(dev, "unregister: operation in progress\n"); snd_mtxunlock(d->lock); sndstat_release(); return EBUSY; } SLIST_FOREACH(sce, &d->channels, link) { ch = sce->channel; if (ch->refcount > 0) { device_printf(dev, "unregister: channel %s busy (pid %d)\n", ch->name, ch->pid); snd_mtxunlock(d->lock); sndstat_release(); return EBUSY; } } if (mixer_uninit(dev)) { device_printf(dev, "unregister: mixer busy\n"); snd_mtxunlock(d->lock); sndstat_release(); return EBUSY; } SLIST_FOREACH(sce, &d->channels, link) { if (sce->dsp_devt) destroy_dev(sce->dsp_devt); if (sce->dspW_devt) destroy_dev(sce->dspW_devt); if (sce->audio_devt) destroy_dev(sce->audio_devt); if (sce->dspr_devt) destroy_dev(sce->dspr_devt); } #ifdef SND_DYNSYSCTL d->sysctl_tree_top = NULL; sysctl_ctx_free(&d->sysctl_tree); #endif while (!SLIST_EMPTY(&d->channels)) pcm_killchan(dev); chn_kill(d->fakechan); fkchan_kill(d->fakechan); snd_mtxunlock(d->lock); snd_mtxfree(d->lock); sndstat_unregister(dev); sndstat_release(); return 0; } /************************************************************************/ static int sndstat_prepare_pcm(struct sbuf *s, device_t dev, int verbose) { struct snddev_info *d; struct snddev_channel *sce; struct pcm_channel *c; struct pcm_feeder *f; int pc, rc, vc; if (verbose < 1) return 0; d = device_get_softc(dev); if (!d) return ENXIO; snd_mtxlock(d->lock); if (!SLIST_EMPTY(&d->channels)) { pc = rc = vc = 0; SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; if (c->direction == PCMDIR_PLAY) { if (c->flags & CHN_F_VIRTUAL) vc++; else pc++; } else rc++; } sbuf_printf(s, " (%dp/%dr/%dv channels%s%s)", d->playcount, d->reccount, d->vchancount, (d->flags & SD_F_SIMPLEX)? "" : " duplex", #ifdef USING_DEVFS (device_get_unit(dev) == snd_unit)? " default" : "" #else "" #endif ); if (verbose <= 1) { snd_mtxunlock(d->lock); return 0; } SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; KASSERT(c->bufhard != NULL && c->bufsoft != NULL, ("hosed pcm channel setup")); sbuf_printf(s, "\n\t"); /* it would be better to indent child channels */ sbuf_printf(s, "%s[%s]: ", c->parentchannel? c->parentchannel->name : "", c->name); sbuf_printf(s, "spd %d", c->speed); if (c->speed != sndbuf_getspd(c->bufhard)) sbuf_printf(s, "/%d", sndbuf_getspd(c->bufhard)); sbuf_printf(s, ", fmt 0x%08x", c->format); if (c->format != sndbuf_getfmt(c->bufhard)) sbuf_printf(s, "/0x%08x", sndbuf_getfmt(c->bufhard)); sbuf_printf(s, ", flags 0x%08x, 0x%08x", c->flags, c->feederflags); if (c->pid != -1) sbuf_printf(s, ", pid %d", c->pid); sbuf_printf(s, "\n\t"); sbuf_printf(s, "interrupts %d, ", c->interrupts); if (c->direction == PCMDIR_REC) sbuf_printf(s, "overruns %d, hfree %d, sfree %d [b:%d/%d/%d|bs:%d/%d/%d]", c->xruns, sndbuf_getfree(c->bufhard), sndbuf_getfree(c->bufsoft), sndbuf_getsize(c->bufhard), sndbuf_getblksz(c->bufhard), sndbuf_getblkcnt(c->bufhard), sndbuf_getsize(c->bufsoft), sndbuf_getblksz(c->bufsoft), sndbuf_getblkcnt(c->bufsoft)); else sbuf_printf(s, "underruns %d, ready %d [b:%d/%d/%d|bs:%d/%d/%d]", c->xruns, sndbuf_getready(c->bufsoft), sndbuf_getsize(c->bufhard), sndbuf_getblksz(c->bufhard), sndbuf_getblkcnt(c->bufhard), sndbuf_getsize(c->bufsoft), sndbuf_getblksz(c->bufsoft), sndbuf_getblkcnt(c->bufsoft)); sbuf_printf(s, "\n\t"); sbuf_printf(s, "{%s}", (c->direction == PCMDIR_REC)? "hardware" : "userland"); sbuf_printf(s, " -> "); f = c->feeder; while (f->source != NULL) f = f->source; while (f != NULL) { sbuf_printf(s, "%s", f->class->name); if (f->desc->type == FEEDER_FMT) sbuf_printf(s, "(0x%08x -> 0x%08x)", f->desc->in, f->desc->out); if (f->desc->type == FEEDER_RATE) sbuf_printf(s, "(%d -> %d)", FEEDER_GET(f, FEEDRATE_SRC), FEEDER_GET(f, FEEDRATE_DST)); if (f->desc->type == FEEDER_ROOT || f->desc->type == FEEDER_MIXER || f->desc->type == FEEDER_VOLUME) sbuf_printf(s, "(0x%08x)", f->desc->out); sbuf_printf(s, " -> "); f = f->parent; } sbuf_printf(s, "{%s}", (c->direction == PCMDIR_REC)? "userland" : "hardware"); } } else sbuf_printf(s, " (mixer only)"); snd_mtxunlock(d->lock); return 0; } /************************************************************************/ #ifdef SND_DYNSYSCTL int sysctl_hw_snd_vchans(SYSCTL_HANDLER_ARGS) { struct snddev_info *d; struct snddev_channel *sce; struct pcm_channel *c; int err, newcnt, cnt; /* * XXX WOAH... NEED SUPER CLEANUP!!! * Robust, yet confusing. Understanding these will * cause your brain spinning like a Doki Doki Dynamo. */ d = oidp->oid_arg1; if (!(d->flags & SD_F_AUTOVCHAN)) { pcm_inprog(d, -1); return EINVAL; } cnt = 0; SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if ((c->direction == PCMDIR_PLAY) && (c->flags & CHN_F_VIRTUAL)) { cnt++; if (req->newptr != NULL && c->flags & CHN_F_BUSY) { /* Better safe than sorry */ CHN_UNLOCK(c); return EBUSY; } } CHN_UNLOCK(c); } newcnt = cnt; err = sysctl_handle_int(oidp, &newcnt, sizeof(newcnt), req); if (err == 0 && req->newptr != NULL) { if (newcnt < 0 || newcnt > SND_MAXVCHANS) return E2BIG; if (pcm_inprog(d, 1) != 1) { pcm_inprog(d, -1); return EINPROGRESS; } if (newcnt > cnt) { /* add new vchans - find a parent channel first */ SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); /* not a candidate if not a play channel */ if (c->direction != PCMDIR_PLAY) goto next; /* not a candidate if a virtual channel */ if (c->flags & CHN_F_VIRTUAL) goto next; /* not a candidate if it's in use */ if (!(c->flags & CHN_F_BUSY) || !(SLIST_EMPTY(&c->children))) /* * if we get here we're a nonvirtual * play channel, and either * 1) not busy * 2) busy with children, not directly * open * * thus we can add children */ goto addok; next: CHN_UNLOCK(c); } pcm_inprog(d, -1); return EBUSY; addok: c->flags |= CHN_F_BUSY; while (err == 0 && newcnt > cnt) { err = vchan_create(c); if (err == 0) cnt++; } CHN_UNLOCK(c); } else if (newcnt < cnt) { snd_mtxlock(d->lock); while (err == 0 && newcnt < cnt) { SLIST_FOREACH(sce, &d->channels, link) { c = sce->channel; CHN_LOCK(c); if (c->direction == PCMDIR_PLAY && (c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL)) == CHN_F_VIRTUAL) goto remok; CHN_UNLOCK(c); } snd_mtxunlock(d->lock); pcm_inprog(d, -1); return EINVAL; remok: CHN_UNLOCK(c); err = vchan_destroy(c); if (err == 0) cnt--; } snd_mtxunlock(d->lock); } pcm_inprog(d, -1); } return err; } #endif /************************************************************************/ static int sound_modevent(module_t mod, int type, void *data) { #if 0 return (midi_modevent(mod, type, data)); #else return 0; #endif } DEV_MODULE(sound, sound_modevent, NULL); MODULE_VERSION(sound, SOUND_MODVER);