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 1.17.2.5 2007/02/04 06:17:14 ariff Exp $
27 * $DragonFly: src/sys/dev/sound/pcm/vchan.c,v 1.8 2008/01/06 16:55:51 swildner 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 1.8 2008/01/06 16:55:51 swildner 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, int volume)
59 * to is the output buffer, tmp is the input buffer
60 * count is the number of 16bit samples to mix
61 * volume is in range 0-100
68 scale = (volume << 16) / 100;
69 doscale = volume != 100;
71 for(i = 0; i < count; i++) {
74 x += ((int)tmp[i] * scale) >> 16;
78 /* kprintf("%d + %d = %d (u)\n", to[i], tmp[i], x); */
82 /* kprintf("%d + %d = %d (o)\n", to[i], tmp[i], x); */
85 to[i] = x & 0x0000ffff;
91 feed_vchan_s16(struct pcm_feeder *f, struct pcm_channel *c, u_int8_t *b, u_int32_t count, void *source)
93 /* we're going to abuse things a bit */
94 struct snd_dbuf *src = source;
95 struct pcmchan_children *cce;
96 struct pcm_channel *ch;
99 unsigned int cnt, rcnt = 0;
103 if (sndbuf_getsize(src) < count)
104 panic("feed_vchan_s16(%s): tmp buffer size %d < count %d, flags = 0x%x",
105 c->name, sndbuf_getsize(src), count, c->flags);
107 sz = sndbuf_getsize(src);
116 * we are going to use our source as a temporary buffer since it's
117 * got no other purpose. we obtain our data by traversing the channel
118 * list of children and calling vchan_mix_* to mix count bytes from each
119 * into our destination buffer, b
122 tmp = (int16_t *)sndbuf_getbuf(src);
124 SLIST_FOREACH(cce, &c->children, link) {
127 if (ch->flags & CHN_F_TRIGGERED) {
128 if (ch->flags & CHN_F_MAPPED)
129 sndbuf_acquire(ch->bufsoft, NULL, sndbuf_getfree(ch->bufsoft));
130 cnt = FEEDER_FEED(ch->feeder, ch, (u_int8_t *)tmp, count, ch->bufsoft);
131 volume = ch->volume & 0xff; /* XXX do special stereo processing? */
132 volume += (ch->volume >> 8) & 0xff;
134 vchan_mix_s16(dst, tmp, cnt >> 1, volume);
144 static struct pcm_feederdesc feeder_vchan_s16_desc[] = {
145 {FEEDER_MIXER, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
148 static kobj_method_t feeder_vchan_s16_methods[] = {
149 KOBJMETHOD(feeder_feed, feed_vchan_s16),
152 FEEDER_DECLARE(feeder_vchan_s16, 2, NULL);
154 /************************************************************/
157 vchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
160 struct pcm_channel *parent = devinfo;
162 KASSERT(dir == PCMDIR_PLAY, ("vchan_init: bad direction"));
163 ch = kmalloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
167 ch->spd = DSP_DEFAULT_SPEED;
170 c->flags |= CHN_F_VIRTUAL;
176 vchan_free(kobj_t obj, void *data)
178 kfree(data, M_DEVBUF);
183 vchan_setformat(kobj_t obj, void *data, u_int32_t format)
185 struct vchinfo *ch = data;
186 struct pcm_channel *parent = ch->parent;
187 struct pcm_channel *channel = ch->channel;
191 ch->bps <<= (ch->fmt & AFMT_STEREO)? 1 : 0;
192 if (ch->fmt & AFMT_16BIT)
194 else if (ch->fmt & AFMT_24BIT)
196 else if (ch->fmt & AFMT_32BIT)
199 chn_notify(parent, CHN_N_FORMAT);
201 sndbuf_setfmt(channel->bufsoft, format);
206 vchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
208 struct vchinfo *ch = data;
209 struct pcm_channel *parent = ch->parent;
210 struct pcm_channel *channel = ch->channel;
215 speed = sndbuf_getspd(parent->bufsoft);
222 vchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
224 struct vchinfo *ch = data;
225 struct pcm_channel *channel = ch->channel;
226 struct pcm_channel *parent = ch->parent;
227 /* struct pcm_channel *channel = ch->channel; */
230 ch->blksz = blocksize;
231 /* CHN_UNLOCK(channel); */
232 sndbuf_setblksz(channel->bufhard, blocksize);
233 chn_notify(parent, CHN_N_BLOCKSIZE);
235 /* CHN_LOCK(channel); */
237 crate = ch->spd * ch->bps;
238 prate = sndbuf_getspd(parent->bufsoft) * sndbuf_getbps(parent->bufsoft);
239 blocksize = sndbuf_getblksz(parent->bufsoft);
248 vchan_trigger(kobj_t obj, void *data, int go)
250 struct vchinfo *ch = data;
251 struct pcm_channel *parent = ch->parent;
252 struct pcm_channel *channel = ch->channel;
254 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
257 ch->run = (go == PCMTRIG_START)? 1 : 0;
259 chn_notify(parent, CHN_N_TRIGGER);
265 static struct pcmchan_caps *
266 vchan_getcaps(kobj_t obj, void *data)
268 struct vchinfo *ch = data;
270 ch->caps.minspeed = sndbuf_getspd(ch->parent->bufsoft);
271 ch->caps.maxspeed = ch->caps.minspeed;
272 ch->caps.fmtlist = vchan_fmt;
278 static kobj_method_t vchan_methods[] = {
279 KOBJMETHOD(channel_init, vchan_init),
280 KOBJMETHOD(channel_free, vchan_free),
281 KOBJMETHOD(channel_setformat, vchan_setformat),
282 KOBJMETHOD(channel_setspeed, vchan_setspeed),
283 KOBJMETHOD(channel_setblocksize, vchan_setblocksize),
284 KOBJMETHOD(channel_trigger, vchan_trigger),
285 KOBJMETHOD(channel_getcaps, vchan_getcaps),
288 CHANNEL_DECLARE(vchan);
292 * On the fly vchan rate settings
296 sysctl_hw_snd_vchanrate(SYSCTL_HANDLER_ARGS)
298 struct snddev_info *d;
299 struct snddev_channel *sce;
300 struct pcm_channel *c, *ch = NULL, *fake;
301 struct pcmchan_caps *caps;
306 if (!(d->flags & SD_F_AUTOVCHAN) || d->vchancount < 1)
308 if (pcm_inprog(d, 1) != 1 && req->newptr != NULL) {
312 SLIST_FOREACH(sce, &d->channels, link) {
315 if (c->direction == PCMDIR_PLAY) {
316 if (c->flags & CHN_F_VIRTUAL) {
318 if (ch != NULL && ch != c->parentchannel) {
323 if (req->newptr != NULL &&
324 (c->flags & CHN_F_BUSY)) {
329 } else if (c->flags & CHN_F_HAS_VCHAN) {
346 err = sysctl_handle_int(oidp, &newspd, sizeof(newspd), req);
347 if (err == 0 && req->newptr != NULL) {
348 if (newspd < 1 || newspd < feeder_rate_ratemin ||
349 newspd > feeder_rate_ratemax) {
354 caps = chn_getcaps(ch);
355 if (caps == NULL || newspd < caps->minspeed ||
356 newspd > caps->maxspeed) {
361 if (newspd != ch->speed) {
362 err = chn_setspeed(ch, newspd);
364 * Try to avoid FEEDER_RATE on parent channel if the
365 * requested value is not supported by the hardware.
367 if (!err && (ch->feederflags & (1 << FEEDER_RATE))) {
368 newspd = sndbuf_getspd(ch->bufhard);
369 err = chn_setspeed(ch, newspd);
373 fake = pcm_getfakechan(d);
376 fake->speed = newspd;
389 /* virtual channel interface */
392 vchan_create(struct pcm_channel *parent)
394 struct snddev_info *d = parent->parentsnddev;
395 struct pcmchan_children *pce;
396 struct pcm_channel *child, *fake;
397 struct pcmchan_caps *parent_caps;
398 int err, first, speed = 0;
400 if (!(parent->flags & CHN_F_BUSY))
406 pce = kmalloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
408 /* create a new playback channel */
409 child = pcm_chn_create(d, parent, &vchan_class, PCMDIR_VIRTUAL, parent);
411 kfree(pce, M_DEVBUF);
415 pce->channel = child;
417 /* add us to our grandparent's channel list */
419 * XXX maybe we shouldn't always add the dev_t
421 err = pcm_chn_add(d, child);
423 pcm_chn_destroy(child);
424 kfree(pce, M_DEVBUF);
430 /* add us to our parent channel's children */
431 first = SLIST_EMPTY(&parent->children);
432 SLIST_INSERT_HEAD(&parent->children, pce, link);
433 parent->flags |= CHN_F_HAS_VCHAN;
436 parent_caps = chn_getcaps(parent);
437 if (parent_caps == NULL)
441 err = chn_reset(parent, AFMT_STEREO | AFMT_S16_LE);
444 fake = pcm_getfakechan(d);
447 * Avoid querying kernel hint, use saved value
458 * This is very sad. Few soundcards advertised as being
459 * able to do (insanely) higher/lower speed, but in
460 * reality, they simply can't. At least, we give user chance
461 * to set sane value via kernel hints or sysctl.
466 r = resource_int_value(device_get_name(parent->dev),
467 device_get_unit(parent->dev),
468 "vchanrate", &speed);
472 * Workaround for sb16 running
473 * poorly at 45k / 49k.
475 switch (parent_caps->maxspeed) {
481 speed = VCHAN_DEFAULT_SPEED;
488 * Limit speed based on driver caps.
489 * This is supposed to help fixed rate, non-VRA
490 * AC97 cards, but.. (see below)
492 if (speed < parent_caps->minspeed)
493 speed = parent_caps->minspeed;
494 if (speed > parent_caps->maxspeed)
495 speed = parent_caps->maxspeed;
498 * We still need to limit the speed between
499 * feeder_rate_ratemin <-> feeder_rate_ratemax. This is
500 * just an escape goat if all of the above failed
503 if (speed < feeder_rate_ratemin)
504 speed = feeder_rate_ratemin;
505 if (speed > feeder_rate_ratemax)
506 speed = feeder_rate_ratemax;
508 err = chn_setspeed(parent, speed);
510 * Try to avoid FEEDER_RATE on parent channel if the
511 * requested value is not supported by the hardware.
513 if (!err && (parent->feederflags & (1 << FEEDER_RATE))) {
514 speed = sndbuf_getspd(parent->bufhard);
515 err = chn_setspeed(parent, speed);
518 if (!err && fake != NULL) {
520 * Save new value to fake channel.
531 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
532 parent->flags &= ~CHN_F_HAS_VCHAN;
534 kfree(pce, M_DEVBUF);
535 if (pcm_chn_remove(d, child) == 0)
536 pcm_chn_destroy(child);
546 vchan_destroy(struct pcm_channel *c)
548 struct pcm_channel *parent = c->parentchannel;
549 struct snddev_info *d = parent->parentsnddev;
550 struct pcmchan_children *pce;
551 struct snddev_channel *sce;
556 if (!(parent->flags & CHN_F_BUSY)) {
560 if (SLIST_EMPTY(&parent->children)) {
565 /* remove us from our parent's children list */
566 SLIST_FOREACH(pce, &parent->children, link) {
567 if (pce->channel == c)
573 SLIST_FOREACH(sce, &d->channels, link) {
574 if (sce->channel == c) {
576 destroy_dev(sce->dsp_devt);
577 sce->dsp_devt = NULL;
579 if (sce->dspW_devt) {
580 destroy_dev(sce->dspW_devt);
581 sce->dspW_devt = NULL;
583 if (sce->audio_devt) {
584 destroy_dev(sce->audio_devt);
585 sce->audio_devt = NULL;
587 if (sce->dspr_devt) {
588 destroy_dev(sce->dspr_devt);
589 sce->dspr_devt = NULL;
595 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
596 kfree(pce, M_DEVBUF);
598 if (SLIST_EMPTY(&parent->children)) {
599 parent->flags &= ~(CHN_F_BUSY | CHN_F_HAS_VCHAN);
601 if (chn_reset(parent, parent->format) == 0)
602 chn_setspeed(parent, spd);
605 /* remove us from our grandparent's channel list */
606 err = pcm_chn_remove(d, c);
609 /* destroy ourselves */
611 err = pcm_chn_destroy(c);
617 vchan_initsys(device_t dev)
620 struct snddev_info *d;
622 d = device_get_softc(dev);
623 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
624 OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
625 sysctl_hw_snd_vchans, "I", "");
627 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
628 OID_AUTO, "vchanrate", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
629 sysctl_hw_snd_vchanrate, "I", "");