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 1.7 2007/06/16 19:48:05 hasso 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 1.7 2007/06/16 19:48:05 hasso 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);
169 ch->spd = DSP_DEFAULT_SPEED;
172 c->flags |= CHN_F_VIRTUAL;
178 vchan_free(kobj_t obj, void *data)
180 kfree(data, M_DEVBUF);
185 vchan_setformat(kobj_t obj, void *data, u_int32_t format)
187 struct vchinfo *ch = data;
188 struct pcm_channel *parent = ch->parent;
189 struct pcm_channel *channel = ch->channel;
193 ch->bps <<= (ch->fmt & AFMT_STEREO)? 1 : 0;
194 if (ch->fmt & AFMT_16BIT)
196 else if (ch->fmt & AFMT_24BIT)
198 else if (ch->fmt & AFMT_32BIT)
201 chn_notify(parent, CHN_N_FORMAT);
203 sndbuf_setfmt(channel->bufsoft, format);
208 vchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
210 struct vchinfo *ch = data;
211 struct pcm_channel *parent = ch->parent;
212 struct pcm_channel *channel = ch->channel;
217 speed = sndbuf_getspd(parent->bufsoft);
224 vchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
226 struct vchinfo *ch = data;
227 struct pcm_channel *channel = ch->channel;
228 struct pcm_channel *parent = ch->parent;
229 /* struct pcm_channel *channel = ch->channel; */
232 ch->blksz = blocksize;
233 /* CHN_UNLOCK(channel); */
234 sndbuf_setblksz(channel->bufhard, blocksize);
235 chn_notify(parent, CHN_N_BLOCKSIZE);
237 /* CHN_LOCK(channel); */
239 crate = ch->spd * ch->bps;
240 prate = sndbuf_getspd(parent->bufsoft) * sndbuf_getbps(parent->bufsoft);
241 blocksize = sndbuf_getblksz(parent->bufsoft);
250 vchan_trigger(kobj_t obj, void *data, int go)
252 struct vchinfo *ch = data;
253 struct pcm_channel *parent = ch->parent;
254 struct pcm_channel *channel = ch->channel;
256 if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
259 ch->run = (go == PCMTRIG_START)? 1 : 0;
261 chn_notify(parent, CHN_N_TRIGGER);
267 static struct pcmchan_caps *
268 vchan_getcaps(kobj_t obj, void *data)
270 struct vchinfo *ch = data;
272 ch->caps.minspeed = sndbuf_getspd(ch->parent->bufsoft);
273 ch->caps.maxspeed = ch->caps.minspeed;
274 ch->caps.fmtlist = vchan_fmt;
280 static kobj_method_t vchan_methods[] = {
281 KOBJMETHOD(channel_init, vchan_init),
282 KOBJMETHOD(channel_free, vchan_free),
283 KOBJMETHOD(channel_setformat, vchan_setformat),
284 KOBJMETHOD(channel_setspeed, vchan_setspeed),
285 KOBJMETHOD(channel_setblocksize, vchan_setblocksize),
286 KOBJMETHOD(channel_trigger, vchan_trigger),
287 KOBJMETHOD(channel_getcaps, vchan_getcaps),
290 CHANNEL_DECLARE(vchan);
294 * On the fly vchan rate settings
298 sysctl_hw_snd_vchanrate(SYSCTL_HANDLER_ARGS)
300 struct snddev_info *d;
301 struct snddev_channel *sce;
302 struct pcm_channel *c, *ch = NULL, *fake;
303 struct pcmchan_caps *caps;
308 if (!(d->flags & SD_F_AUTOVCHAN) || d->vchancount < 1)
310 if (pcm_inprog(d, 1) != 1 && req->newptr != NULL) {
314 SLIST_FOREACH(sce, &d->channels, link) {
317 if (c->direction == PCMDIR_PLAY) {
318 if (c->flags & CHN_F_VIRTUAL) {
320 if (ch != NULL && ch != c->parentchannel) {
325 if (req->newptr != NULL &&
326 (c->flags & CHN_F_BUSY)) {
331 } else if (c->flags & CHN_F_HAS_VCHAN) {
348 err = sysctl_handle_int(oidp, &newspd, sizeof(newspd), req);
349 if (err == 0 && req->newptr != NULL) {
350 if (newspd < 1 || newspd < feeder_rate_ratemin ||
351 newspd > feeder_rate_ratemax) {
356 caps = chn_getcaps(ch);
357 if (caps == NULL || newspd < caps->minspeed ||
358 newspd > caps->maxspeed) {
363 if (newspd != ch->speed) {
364 err = chn_setspeed(ch, newspd);
366 * Try to avoid FEEDER_RATE on parent channel if the
367 * requested value is not supported by the hardware.
369 if (!err && (ch->feederflags & (1 << FEEDER_RATE))) {
370 newspd = sndbuf_getspd(ch->bufhard);
371 err = chn_setspeed(ch, newspd);
375 fake = pcm_getfakechan(d);
378 fake->speed = newspd;
391 /* virtual channel interface */
394 vchan_create(struct pcm_channel *parent)
396 struct snddev_info *d = parent->parentsnddev;
397 struct pcmchan_children *pce;
398 struct pcm_channel *child, *fake;
399 struct pcmchan_caps *parent_caps;
400 int err, first, speed = 0;
402 if (!(parent->flags & CHN_F_BUSY))
408 pce = kmalloc(sizeof(*pce), M_DEVBUF, M_WAITOK | M_ZERO);
414 /* create a new playback channel */
415 child = pcm_chn_create(d, parent, &vchan_class, PCMDIR_VIRTUAL, parent);
417 kfree(pce, M_DEVBUF);
421 pce->channel = child;
423 /* add us to our grandparent's channel list */
425 * XXX maybe we shouldn't always add the dev_t
427 err = pcm_chn_add(d, child);
429 pcm_chn_destroy(child);
430 kfree(pce, M_DEVBUF);
436 /* add us to our parent channel's children */
437 first = SLIST_EMPTY(&parent->children);
438 SLIST_INSERT_HEAD(&parent->children, pce, link);
439 parent->flags |= CHN_F_HAS_VCHAN;
442 parent_caps = chn_getcaps(parent);
443 if (parent_caps == NULL)
447 err = chn_reset(parent, AFMT_STEREO | AFMT_S16_LE);
450 fake = pcm_getfakechan(d);
453 * Avoid querying kernel hint, use saved value
464 * This is very sad. Few soundcards advertised as being
465 * able to do (insanely) higher/lower speed, but in
466 * reality, they simply can't. At least, we give user chance
467 * to set sane value via kernel hints or sysctl.
472 r = resource_int_value(device_get_name(parent->dev),
473 device_get_unit(parent->dev),
474 "vchanrate", &speed);
478 * Workaround for sb16 running
479 * poorly at 45k / 49k.
481 switch (parent_caps->maxspeed) {
487 speed = VCHAN_DEFAULT_SPEED;
494 * Limit speed based on driver caps.
495 * This is supposed to help fixed rate, non-VRA
496 * AC97 cards, but.. (see below)
498 if (speed < parent_caps->minspeed)
499 speed = parent_caps->minspeed;
500 if (speed > parent_caps->maxspeed)
501 speed = parent_caps->maxspeed;
504 * We still need to limit the speed between
505 * feeder_rate_ratemin <-> feeder_rate_ratemax. This is
506 * just an escape goat if all of the above failed
509 if (speed < feeder_rate_ratemin)
510 speed = feeder_rate_ratemin;
511 if (speed > feeder_rate_ratemax)
512 speed = feeder_rate_ratemax;
514 err = chn_setspeed(parent, speed);
516 * Try to avoid FEEDER_RATE on parent channel if the
517 * requested value is not supported by the hardware.
519 if (!err && (parent->feederflags & (1 << FEEDER_RATE))) {
520 speed = sndbuf_getspd(parent->bufhard);
521 err = chn_setspeed(parent, speed);
524 if (!err && fake != NULL) {
526 * Save new value to fake channel.
537 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
538 parent->flags &= ~CHN_F_HAS_VCHAN;
540 kfree(pce, M_DEVBUF);
541 if (pcm_chn_remove(d, child) == 0)
542 pcm_chn_destroy(child);
552 vchan_destroy(struct pcm_channel *c)
554 struct pcm_channel *parent = c->parentchannel;
555 struct snddev_info *d = parent->parentsnddev;
556 struct pcmchan_children *pce;
557 struct snddev_channel *sce;
562 if (!(parent->flags & CHN_F_BUSY)) {
566 if (SLIST_EMPTY(&parent->children)) {
571 /* remove us from our parent's children list */
572 SLIST_FOREACH(pce, &parent->children, link) {
573 if (pce->channel == c)
579 SLIST_FOREACH(sce, &d->channels, link) {
580 if (sce->channel == c) {
582 destroy_dev(sce->dsp_devt);
583 sce->dsp_devt = NULL;
585 if (sce->dspW_devt) {
586 destroy_dev(sce->dspW_devt);
587 sce->dspW_devt = NULL;
589 if (sce->audio_devt) {
590 destroy_dev(sce->audio_devt);
591 sce->audio_devt = NULL;
593 if (sce->dspr_devt) {
594 destroy_dev(sce->dspr_devt);
595 sce->dspr_devt = NULL;
601 SLIST_REMOVE(&parent->children, pce, pcmchan_children, link);
602 kfree(pce, M_DEVBUF);
604 if (SLIST_EMPTY(&parent->children)) {
605 parent->flags &= ~(CHN_F_BUSY | CHN_F_HAS_VCHAN);
607 if (chn_reset(parent, parent->format) == 0)
608 chn_setspeed(parent, spd);
611 /* remove us from our grandparent's channel list */
612 err = pcm_chn_remove(d, c);
615 /* destroy ourselves */
617 err = pcm_chn_destroy(c);
623 vchan_initsys(device_t dev)
626 struct snddev_info *d;
628 d = device_get_softc(dev);
629 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
630 OID_AUTO, "vchans", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
631 sysctl_hw_snd_vchans, "I", "");
633 SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
634 OID_AUTO, "vchanrate", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
635 sysctl_hw_snd_vchanrate, "I", "");