2 * Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/sound/pcm/vchan.c,v 1.17.2.4 2006/04/04 17:43:49 ariff Exp $
27 * $DragonFly: src/sys/dev/sound/pcm/vchan.c,v 1.5 2007/01/04 21:47:03 corecode Exp $
30 #include <dev/sound/pcm/sound.h>
31 #include <dev/sound/pcm/vchan.h>
32 #include "feeder_if.h"
34 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/vchan.c,v 1.5 2007/01/04 21:47:03 corecode Exp $");
39 #define VCHAN_DEFAULT_SPEED 48000
41 extern int feeder_rate_ratemin;
42 extern int feeder_rate_ratemax;
45 u_int32_t spd, fmt, blksz, bps, run;
46 struct pcm_channel *channel, *parent;
47 struct pcmchan_caps caps;
50 static u_int32_t vchan_fmt[] = {
51 AFMT_STEREO | AFMT_S16_LE,
56 vchan_mix_s16(int16_t *to, int16_t *tmp, unsigned int count)
59 * to is the output buffer, tmp is the input buffer
60 * count is the number of 16bit samples to mix
65 for(i = 0; i < count; i++) {
69 /* kprintf("%d + %d = %d (u)\n", to[i], tmp[i], x); */
73 /* kprintf("%d + %d = %d (o)\n", to[i], tmp[i], x); */
76 to[i] = x & 0x0000ffff;
82 feed_vchan_s16(struct pcm_feeder *f, struct pcm_channel *c, u_int8_t *b, u_int32_t count, void *source)
84 /* we're going to abuse things a bit */
85 struct snd_dbuf *src = source;
86 struct pcmchan_children *cce;
87 struct pcm_channel *ch;
90 unsigned int cnt, rcnt = 0;
93 if (sndbuf_getsize(src) < count)
94 panic("feed_vchan_s16(%s): tmp buffer size %d < count %d, flags = 0x%x",
95 c->name, sndbuf_getsize(src), count, c->flags);
97 sz = sndbuf_getsize(src);
106 * we are going to use our source as a temporary buffer since it's
107 * got no other purpose. we obtain our data by traversing the channel
108 * list of children and calling vchan_mix_* to mix count bytes from each
109 * into our destination buffer, b
112 tmp = (int16_t *)sndbuf_getbuf(src);
114 SLIST_FOREACH(cce, &c->children, link) {
117 if (ch->flags & CHN_F_TRIGGERED) {
118 if (ch->flags & CHN_F_MAPPED)
119 sndbuf_acquire(ch->bufsoft, NULL, sndbuf_getfree(ch->bufsoft));
120 cnt = FEEDER_FEED(ch->feeder, ch, (u_int8_t *)tmp, count, ch->bufsoft);
121 vchan_mix_s16(dst, tmp, cnt >> 1);
131 static struct pcm_feederdesc feeder_vchan_s16_desc[] = {
132 {FEEDER_MIXER, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
135 static kobj_method_t feeder_vchan_s16_methods[] = {
136 KOBJMETHOD(feeder_feed, feed_vchan_s16),
139 FEEDER_DECLARE(feeder_vchan_s16, 2, NULL);
141 /************************************************************/
144 vchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
147 struct pcm_channel *parent = devinfo;
149 KASSERT(dir == PCMDIR_PLAY, ("vchan_init: bad direction"));
150 ch = kmalloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
156 ch->spd = DSP_DEFAULT_SPEED;
159 c->flags |= CHN_F_VIRTUAL;
165 vchan_free(kobj_t obj, void *data)
171 vchan_setformat(kobj_t obj, void *data, u_int32_t format)
173 struct vchinfo *ch = data;
174 struct pcm_channel *parent = ch->parent;
175 struct pcm_channel *channel = ch->channel;
179 ch->bps <<= (ch->fmt & AFMT_STEREO)? 1 : 0;
180 if (ch->fmt & AFMT_16BIT)
182 else if (ch->fmt & AFMT_24BIT)
184 else if (ch->fmt & AFMT_32BIT)
187 chn_notify(parent, CHN_N_FORMAT);
189 sndbuf_setfmt(channel->bufsoft, format);
194 vchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
196 struct vchinfo *ch = data;
197 struct pcm_channel *parent = ch->parent;
198 struct pcm_channel *channel = ch->channel;
203 speed = sndbuf_getspd(parent->bufsoft);
210 vchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
212 struct vchinfo *ch = data;
213 struct pcm_channel *channel = ch->channel;
214 struct pcm_channel *parent = ch->parent;
215 /* struct pcm_channel *channel = ch->channel; */
218 ch->blksz = blocksize;
219 /* CHN_UNLOCK(channel); */
220 sndbuf_setblksz(channel->bufhard, blocksize);
221 chn_notify(parent, CHN_N_BLOCKSIZE);
223 /* CHN_LOCK(channel); */
225 crate = ch->spd * ch->bps;
226 prate = sndbuf_getspd(parent->bufsoft) * sndbuf_getbps(parent->bufsoft);
227 blocksize = sndbuf_getblksz(parent->bufsoft);
236 vchan_trigger(kobj_t obj, void *data, int go)
238 struct vchinfo *ch = data;
239 struct pcm_channel *parent = ch->parent;
240 struct pcm_channel *channel = ch->channel;
242 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
245 ch->run = (go == PCMTRIG_START)? 1 : 0;
247 chn_notify(parent, CHN_N_TRIGGER);
253 static struct pcmchan_caps *
254 vchan_getcaps(kobj_t obj, void *data)
256 struct vchinfo *ch = data;
258 ch->caps.minspeed = sndbuf_getspd(ch->parent->bufsoft);
259 ch->caps.maxspeed = ch->caps.minspeed;
260 ch->caps.fmtlist = vchan_fmt;
266 static kobj_method_t vchan_methods[] = {
267 KOBJMETHOD(channel_init, vchan_init),
268 KOBJMETHOD(channel_free, vchan_free),
269 KOBJMETHOD(channel_setformat, vchan_setformat),
270 KOBJMETHOD(channel_setspeed, vchan_setspeed),
271 KOBJMETHOD(channel_setblocksize, vchan_setblocksize),
272 KOBJMETHOD(channel_trigger, vchan_trigger),
273 KOBJMETHOD(channel_getcaps, vchan_getcaps),
276 CHANNEL_DECLARE(vchan);
280 * On the fly vchan rate settings
284 sysctl_hw_snd_vchanrate(SYSCTL_HANDLER_ARGS)
286 struct snddev_info *d;
287 struct snddev_channel *sce;
288 struct pcm_channel *c, *ch = NULL, *fake;
289 struct pcmchan_caps *caps;
294 if (!(d->flags & SD_F_AUTOVCHAN) || d->vchancount < 1)
296 if (pcm_inprog(d, 1) != 1 && req->newptr != NULL) {
300 SLIST_FOREACH(sce, &d->channels, link) {
303 if (c->direction == PCMDIR_PLAY) {
304 if (c->flags & CHN_F_VIRTUAL) {
306 if (ch != NULL && ch != c->parentchannel) {
311 if (req->newptr != NULL &&
312 (c->flags & CHN_F_BUSY)) {
317 } else if (c->flags & CHN_F_HAS_VCHAN) {
334 err = sysctl_handle_int(oidp, &newspd, sizeof(newspd), req);
335 if (err == 0 && req->newptr != NULL) {
336 if (newspd < 1 || newspd < feeder_rate_ratemin ||
337 newspd > feeder_rate_ratemax) {
342 caps = chn_getcaps(ch);
343 if (caps == NULL || newspd < caps->minspeed ||
344 newspd > caps->maxspeed) {
349 if (newspd != ch->speed) {
350 err = chn_setspeed(ch, newspd);
352 * Try to avoid FEEDER_RATE on parent channel if the
353 * requested value is not supported by the hardware.
355 if (!err && (ch->feederflags & (1 << FEEDER_RATE))) {
356 newspd = sndbuf_getspd(ch->bufhard);
357 err = chn_setspeed(ch, newspd);
361 fake = pcm_getfakechan(d);
364 fake->speed = newspd;
377 /* virtual channel interface */
380 vchan_create(struct pcm_channel *parent)
382 struct snddev_info *d = parent->parentsnddev;
383 struct pcmchan_children *pce;
384 struct pcm_channel *child, *fake;
385 struct pcmchan_caps *parent_caps;
386 int err, first, speed = 0;
388 if (!(parent->flags & CHN_F_BUSY))
394 pce = kmalloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
400 /* create a new playback channel */
401 child = pcm_chn_create(d, parent, &vchan_class, PCMDIR_VIRTUAL, parent);
403 kfree(pce, M_DEVBUF);
407 pce->channel = child;
409 /* add us to our grandparent's channel list */
411 * XXX maybe we shouldn't always add the dev_t
413 err = pcm_chn_add(d, child);
415 pcm_chn_destroy(child);
416 kfree(pce, M_DEVBUF);
422 /* add us to our parent channel's children */
423 first = SLIST_EMPTY(&parent->children);
424 SLIST_INSERT_HEAD(&parent->children, pce, link);
425 parent->flags |= CHN_F_HAS_VCHAN;
428 parent_caps = chn_getcaps(parent);
429 if (parent_caps == NULL)
433 err = chn_reset(parent, AFMT_STEREO | AFMT_S16_LE);
436 fake = pcm_getfakechan(d);
439 * Avoid querying kernel hint, use saved value
450 * This is very sad. Few soundcards advertised as being
451 * able to do (insanely) higher/lower speed, but in
452 * reality, they simply can't. At least, we give user chance
453 * to set sane value via kernel hints or sysctl.
458 r = resource_int_value(device_get_name(parent->dev),
459 device_get_unit(parent->dev),
460 "vchanrate", &speed);
464 * Workaround for sb16 running
465 * poorly at 45k / 49k.
467 switch (parent_caps->maxspeed) {
473 speed = VCHAN_DEFAULT_SPEED;
480 * Limit speed based on driver caps.
481 * This is supposed to help fixed rate, non-VRA
482 * AC97 cards, but.. (see below)
484 if (speed < parent_caps->minspeed)
485 speed = parent_caps->minspeed;
486 if (speed > parent_caps->maxspeed)
487 speed = parent_caps->maxspeed;
490 * We still need to limit the speed between
491 * feeder_rate_ratemin <-> feeder_rate_ratemax. This is
492 * just an escape goat if all of the above failed
495 if (speed < feeder_rate_ratemin)
496 speed = feeder_rate_ratemin;
497 if (speed > feeder_rate_ratemax)
498 speed = feeder_rate_ratemax;
500 err = chn_setspeed(parent, speed);
502 * Try to avoid FEEDER_RATE on parent channel if the
503 * requested value is not supported by the hardware.
505 if (!err && (parent->feederflags & (1 << FEEDER_RATE))) {
506 speed = sndbuf_getspd(parent->bufhard);
507 err = chn_setspeed(parent, speed);
510 if (!err && fake != NULL) {
512 * Save new value to fake channel.
523 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
524 parent->flags &= ~CHN_F_HAS_VCHAN;
526 kfree(pce, M_DEVBUF);
527 if (pcm_chn_remove(d, child) == 0)
528 pcm_chn_destroy(child);
538 vchan_destroy(struct pcm_channel *c)
540 struct pcm_channel *parent = c->parentchannel;
541 struct snddev_info *d = parent->parentsnddev;
542 struct pcmchan_children *pce;
543 struct snddev_channel *sce;
548 if (!(parent->flags & CHN_F_BUSY)) {
552 if (SLIST_EMPTY(&parent->children)) {
557 /* remove us from our parent's children list */
558 SLIST_FOREACH(pce, &parent->children, link) {
559 if (pce->channel == c)
565 SLIST_FOREACH(sce, &d->channels, link) {
566 if (sce->channel == c) {
568 destroy_dev(sce->dsp_devt);
569 sce->dsp_devt = NULL;
571 if (sce->dspW_devt) {
572 destroy_dev(sce->dspW_devt);
573 sce->dspW_devt = NULL;
575 if (sce->audio_devt) {
576 destroy_dev(sce->audio_devt);
577 sce->audio_devt = NULL;
579 if (sce->dspr_devt) {
580 destroy_dev(sce->dspr_devt);
581 sce->dspr_devt = NULL;
587 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
588 kfree(pce, M_DEVBUF);
590 if (SLIST_EMPTY(&parent->children)) {
591 parent->flags &= ~(CHN_F_BUSY | CHN_F_HAS_VCHAN);
593 if (chn_reset(parent, parent->format) == 0)
594 chn_setspeed(parent, spd);
597 /* remove us from our grandparent's channel list */
598 err = pcm_chn_remove(d, c);
601 /* destroy ourselves */
603 err = pcm_chn_destroy(c);
609 vchan_initsys(device_t dev)
612 struct snddev_info *d;
614 d = device_get_softc(dev);
615 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
616 OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
617 sysctl_hw_snd_vchans, "I", "");
619 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
620 OID_AUTO, "vchanrate", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
621 sysctl_hw_snd_vchanrate, "I", "");