Lines Matching +full:pcm +full:- +full:sync +full:- +full:mode
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
7 * Portions Copyright (c) Luigi Rizzo <luigi@FreeBSD.org> - 1997-99
36 #include <dev/sound/pcm/sound.h>
37 #include <dev/sound/pcm/vchan.h>
43 &report_soft_formats, 0, "report software-emulated formats");
47 &report_soft_matrix, 0, "report software-emulated channel matrixing");
58 if (err != 0 || req->newptr == NULL)
81 if (err != 0 || req->newptr == NULL)
104 if (err != 0 || req->newptr == NULL)
116 "interrupt timeout (1 - 10) seconds");
139 CHN_FOREACH(c, d, channels.pcm) {
158 if (err != 0 || req->newptr == NULL)
180 if (err != 0 || req->newptr == NULL || val == 0)
194 static int chn_syncdelay = -1;
200 "append (0-1000) millisecond trailing buffer delay on each sync");
203 * @brief Channel sync group lock
209 MTX_SYSINIT(pcm_syncgroup, &snd_pcm_syncgroups_mtx, "PCM channel sync group lock", MTX_DEF);
225 c->lock = snd_mtxcreate(c->name, "pcm play channel");
226 cv_init(&c->intr_cv, "pcmwr");
229 c->lock = snd_mtxcreate(c->name, "pcm virtual play channel");
230 cv_init(&c->intr_cv, "pcmwrv");
233 c->lock = snd_mtxcreate(c->name, "pcm record channel");
234 cv_init(&c->intr_cv, "pcmrd");
237 c->lock = snd_mtxcreate(c->name, "pcm virtual record channel");
238 cv_init(&c->intr_cv, "pcmrdv");
245 cv_init(&c->cv, "pcmchn");
253 CHN_BROADCAST(&c->cv);
254 CHN_BROADCAST(&c->intr_cv);
256 cv_destroy(&c->cv);
257 cv_destroy(&c->intr_cv);
259 snd_mtxfree(c->lock);
271 struct snd_dbuf *bs = c->bufsoft;
276 if (c->flags & CHN_F_MMAP) {
277 if (sndbuf_getprevtotal(bs) < c->lw)
278 delta = c->lw;
280 delta = sndbuf_gettotal(bs) - sndbuf_getprevtotal(bs);
282 if (c->direction == PCMDIR_PLAY)
288 return ((delta < c->lw) ? 0 : 1);
296 sndbuf_updateprevtotal(c->bufsoft);
307 bs = c->bufsoft;
312 CHN_BROADCAST(&c->intr_cv);
329 if (c->flags & CHN_F_DEAD)
332 c->sleeping++;
333 ret = cv_timedwait_sig(&c->intr_cv, c->lock, timeout);
334 c->sleeping--;
336 return ((c->flags & CHN_F_DEAD) ? EINVAL : ret);
347 struct snd_dbuf *b = c->bufhard;
355 delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b);
358 if (c->direction == PCMDIR_PLAY) {
360 amt -= amt % sndbuf_getalign(b);
365 amt -= amt % sndbuf_getalign(b);
370 device_printf(c->dev, "WARNING: %s DMA completion "
383 struct snd_dbuf *b = c->bufhard;
384 struct snd_dbuf *bs = c->bufsoft;
389 if ((c->flags & CHN_F_MMAP) && !(c->flags & CHN_F_CLOSING))
394 imax(0, sndbuf_xbytes(sndbuf_getsize(bs), bs, b) -
398 sndbuf_feed(bs, b, c, c->feeder, amt);
404 c->xruns++;
424 * user write routine - uiomove data into secondary buffer, trigger if necessary
433 struct snd_dbuf *bs = c->bufsoft;
442 while (ret == 0 && buf->uio_resid > 0) {
443 sz = min(buf->uio_resid, sndbuf_getfree(bs));
448 * unlock-uiomove-lock sequence.
452 t = min(sz, sndbuf_getsize(bs) - p);
457 sz -= t;
461 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
464 c->flags |= CHN_F_DEAD;
466 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER)) {
482 c->flags |= CHN_F_DEAD;
483 device_printf(c->dev, "%s(): %s: "
485 __func__, c->name);
487 c->flags |= CHN_F_ABORTING;
500 struct snd_dbuf *b = c->bufhard;
501 struct snd_dbuf *bs = c->bufsoft;
506 if (c->flags & CHN_F_MMAP)
511 sndbuf_feed(b, bs, c, c->feeder, amt);
515 c->xruns++;
529 /* tell the driver to update the primary buffer if non-dma */
538 * user read routine - trigger if necessary, uiomove data from secondary buffer
547 struct snd_dbuf *bs = c->bufsoft;
553 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
556 c->flags |= CHN_F_DEAD;
564 while (ret == 0 && buf->uio_resid > 0) {
565 sz = min(buf->uio_resid, sndbuf_getready(bs));
570 * unlock-uiomove-lock sequence.
574 t = min(sz, sndbuf_getsize(bs) - p);
579 sz -= t;
583 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER))
589 c->flags |= CHN_F_DEAD;
590 device_printf(c->dev, "%s(): %s: "
592 __func__, c->name);
594 c->flags |= CHN_F_ABORTING;
607 c->interrupts++;
609 if (c->direction == PCMDIR_PLAY)
633 struct snd_dbuf *b = c->bufhard;
634 struct snd_dbuf *bs = c->bufsoft;
639 if (CHN_STARTED(c) || ((c->flags & CHN_F_NOTRIGGER) && !force))
648 if (c->direction == PCMDIR_REC) {
664 device_printf(c->dev, "%s(): %s (%s) threshold "
666 (c->flags & CHN_F_VIRTUAL) ? "virtual" :
671 c->flags |= CHN_F_TRIGGERED;
673 if (c->flags & CHN_F_CLOSING)
674 c->feedcount = 2;
676 c->feedcount = 0;
677 c->interrupts = 0;
678 c->xruns = 0;
680 if (c->parentchannel == NULL) {
681 if (c->direction == PCMDIR_PLAY)
685 device_printf(c->dev,
690 (c->flags & CHN_F_HAS_VCHAN) ?
692 (c->flags & CHN_F_CLOSING) ? "closing" :
695 force, i, j, c->timeout,
708 struct snd_dbuf *b = c->bufhard;
709 struct snd_dbuf *bs = c->bufsoft;
711 c->blocks = 0;
730 if (c->direction != PCMDIR_PLAY)
733 bs = c->bufsoft;
735 if ((c->flags & (CHN_F_DEAD | CHN_F_ABORTING)) ||
749 b = CHN_BUF_PARENT(c, c->bufhard);
759 * Append (0-1000) millisecond trailing buffer (if needed)
767 minflush -= minflush % sndbuf_getalign(bs);
773 minflush -= threshold;
780 device_printf(c->dev,
794 device_printf(c->dev, "%s(): [begin] timeout=%d count=%d "
795 "minflush=%d resid=%d\n", __func__, c->timeout, count,
798 cflag = c->flags & CHN_F_CLOSING;
799 c->flags |= CHN_F_CLOSING;
801 ret = chn_sleep(c, c->timeout);
803 c->flags |= CHN_F_ABORTING;
808 --count;
810 device_printf(c->dev,
814 __func__, c->timeout, count,
819 device_printf(c->dev,
823 __func__, c->timeout, count,
832 minflush -= threshold;
838 c->flags &= ~CHN_F_CLOSING;
839 c->flags |= cflag;
842 device_printf(c->dev,
845 __func__, c->timeout, count, hcount, resid, residp,
855 struct snd_dbuf *bs = c->bufsoft;
860 if (!(c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED))) {
886 struct snd_dbuf *b = c->bufhard;
887 struct snd_dbuf *bs = c->bufsoft;
892 c->flags |= CHN_F_ABORTING;
894 c->flags &= ~CHN_F_TRIGGERED;
898 if (!(c->flags & CHN_F_VIRTUAL))
902 c->flags &= ~CHN_F_ABORTING;
920 struct snd_dbuf *b = c->bufhard;
923 KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
924 DEB(printf("chn_flush: c->flags 0x%08x\n", c->flags));
926 c->flags |= CHN_F_CLOSING;
928 c->flags &= ~CHN_F_TRIGGERED;
933 c->flags &= ~CHN_F_CLOSING;
1078 afmt_tab[i].name, ch - ext, ext);
1090 c->feedcount = 0;
1091 c->flags &= CHN_F_RESET;
1092 c->interrupts = 0;
1093 c->timeout = 1;
1094 c->xruns = 0;
1096 c->flags |= (pcm_getflags(c->dev) & SD_F_BITPERFECT) ?
1099 r = CHANNEL_RESET(c->methods, c->devinfo);
1113 r = CHANNEL_RESETDONE(c->methods, c->devinfo);
1123 return (d->p_unr);
1125 return (d->vp_unr);
1127 return (d->r_unr);
1129 return (d->vr_unr);
1144 switch (c->type) {
1162 device_get_unit(c->dev), str, c->unit);
1190 device_printf(d->dev,
1201 c->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO);
1205 c->direction = direction;
1206 c->type = dir;
1207 c->unit = alloc_unr(chn_getunr(d, c->type));
1208 c->format = SND_FORMAT(AFMT_U8, 1, 0);
1209 c->speed = DSP_DEFAULT_SPEED;
1210 c->pid = -1;
1211 c->latency = -1;
1212 c->timeout = 1;
1213 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
1214 c->parentsnddev = d;
1215 c->parentchannel = parent;
1216 c->dev = d->dev;
1217 c->trigger = PCMTRIG_STOP;
1218 strlcpy(c->name, chn_mkname(buf, sizeof(buf), c), sizeof(c->name));
1220 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0);
1221 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
1224 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER;
1226 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER;
1227 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm;
1235 device_printf(d->dev, "%s(): failed to get feeder class\n",
1240 device_printf(d->dev, "%s(): failed to add feeder\n", __func__);
1244 b = sndbuf_create(c->dev, c->name, "primary", c);
1245 bs = sndbuf_create(c->dev, c->name, "secondary", c);
1247 device_printf(d->dev, "%s(): failed to create %s buffer\n",
1251 c->bufhard = b;
1252 c->bufsoft = bs;
1254 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction);
1255 if (c->devinfo == NULL) {
1256 device_printf(d->dev, "%s(): CHANNEL_INIT() failed\n", __func__);
1260 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0)) {
1261 device_printf(d->dev, "%s(): hardware buffer's size is 0\n",
1266 sndbuf_setfmt(b, c->format);
1267 sndbuf_setspd(b, c->speed);
1268 sndbuf_setfmt(bs, c->format);
1269 sndbuf_setspd(bs, c->speed);
1277 if (c->direction == PCMDIR_PLAY) {
1278 bs->sl = sndbuf_getmaxsize(bs);
1279 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_WAITOK);
1283 CHN_INSERT_SORT_ASCEND(d, c, channels.pcm);
1285 switch (c->type) {
1287 d->playcount++;
1290 d->pvchancount++;
1293 d->reccount++;
1296 d->rvchancount++;
1305 free_unr(chn_getunr(d, c->type), c->unit);
1307 if (c->devinfo && CHANNEL_FREE(c->methods, c->devinfo))
1316 kobj_delete(c->methods, M_DEVBUF);
1327 struct snddev_info *d = c->parentsnddev;
1328 struct snd_dbuf *b = c->bufhard;
1329 struct snd_dbuf *bs = c->bufsoft;
1331 PCM_BUSYASSERT(c->parentsnddev);
1334 CHN_REMOVE(d, c, channels.pcm);
1336 switch (c->type) {
1338 d->playcount--;
1341 d->pvchancount--;
1344 d->reccount--;
1347 d->rvchancount--;
1359 free_unr(chn_getunr(c->parentsnddev, c->type), c->unit);
1361 if (CHANNEL_FREE(c->methods, c->devinfo))
1366 c->flags |= CHN_F_DEAD;
1368 kobj_delete(c->methods, M_DEVBUF);
1378 c->flags |= CHN_F_DEAD;
1385 PCM_BUSYASSERT(c->parentsnddev);
1388 c->flags &= ~CHN_F_BUSY;
1389 c->pid = -1;
1390 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
1435 c->volume[vc][vt] = val;
1444 c->volume[SND_VOL_C_VAL(vc)][vt] =
1445 SND_VOL_CALC_VAL(c->volume, vc, vt);
1450 c->volume[SND_VOL_C_VAL(vc)][i] =
1451 SND_VOL_CALC_VAL(c->volume, vc, i);
1454 c->volume[SND_VOL_C_VAL(vc)][vt] =
1455 SND_VOL_CALC_VAL(c->volume, vc, vt);
1471 return (c->volume[vc][vt]);
1507 c->muted[vc][vt] = mute;
1516 c->muted[SND_VOL_C_VAL(vc)][vt] = mute;
1521 c->muted[SND_VOL_C_VAL(vc)][i] = mute;
1524 c->muted[SND_VOL_C_VAL(vc)][vt] = mute;
1540 return (c->muted[vc][vt]);
1550 if (!(c->format & AFMT_CONVERTIBLE))
1553 return (&c->matrix);
1564 if (!(c->format & AFMT_CONVERTIBLE))
1567 c->matrix = *m;
1568 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
1570 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext)));
1584 if (!(c->format & AFMT_CONVERTIBLE))
1587 return (feeder_matrix_oss_get_channel_order(&c->matrix, map));
1600 if (!(c->format & AFMT_CONVERTIBLE))
1603 m = c->matrix;
1628 if (caps == NULL || caps->fmtlist == NULL)
1631 for (i = 0; caps->fmtlist[i] != 0; i++) {
1632 format = caps->fmtlist[i];
1637 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format);
1640 if (m->mask & SND_CHN_OSS_FRONT)
1642 if (m->mask & SND_CHN_OSS_SURR)
1644 if (m->mask & SND_CHN_OSS_CENTER_LFE)
1646 if (m->mask & SND_CHN_OSS_REAR)
1650 /* report software-supported binding mask */
1671 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]);
1684 ret = 1 << (ret - 1);
1703 tmp = ret - (ret % round);
1706 tmp = ret - (ret % round);
1719 * +---------+------------+-----------+------------+
1721 * +---------+------------+-----------+------------+
1723 * +---------+------------+-----------+------------+
1725 * +---------+------------+-----------+------------+
1727 * +---------+------------+-----------+------------+
1729 * +---------+------------+-----------+------------+
1731 * +---------+------------+-----------+------------+
1733 * +---------+------------+-----------+------------+
1735 * +---------+------------+-----------+------------+
1737 * +---------+------------+-----------+------------+
1739 * +---------+------------+-----------+------------+
1741 * +---------+------------+-----------+------------+
1743 * +---------+------------+-----------+------------+
1750 * +---------+------------+-----------+------------+
1752 * +---------+------------+-----------+------------+
1754 * +---------+------------+-----------+------------+
1756 * +---------+------------+-----------+------------+
1758 * +---------+------------+-----------+------------+
1760 * +---------+------------+-----------+------------+
1762 * +---------+------------+-----------+------------+
1764 * +---------+------------+-----------+------------+
1766 * +---------+------------+-----------+------------+
1768 * +---------+------------+-----------+------------+
1770 * +---------+------------+-----------+------------+
1772 * +---------+------------+-----------+------------+
1774 * +---------+------------+-----------+------------+
1862 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) ||
1863 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC))
1866 if (latency == -1) {
1867 c->latency = -1;
1869 } else if (latency == -2) {
1870 latency = c->latency;
1876 c->latency = latency;
1879 bs = c->bufsoft;
1880 b = c->bufhard;
1882 if (!(blksz == 0 || blkcnt == -1) &&
1887 chn_calclatency(c->direction, latency, sndbuf_getalign(bs),
1891 if (blksz == 0 || blkcnt == -1) {
1892 if (blkcnt == -1)
1893 c->flags &= ~CHN_F_HAS_SIZE;
1894 if (c->flags & CHN_F_HAS_SIZE) {
1899 c->flags |= CHN_F_HAS_SIZE;
1901 if (c->flags & CHN_F_HAS_SIZE) {
1913 if (c->parentchannel != NULL) {
1914 pb = c->parentchannel->bufsoft;
1916 CHN_LOCK(c->parentchannel);
1917 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE);
1918 CHN_UNLOCK(c->parentchannel);
1920 if (c->direction == PCMDIR_PLAY) {
1929 if (c->flags & CHN_F_HAS_SIZE) {
1934 chn_calclatency(c->direction, latency,
1950 hblksz -= hblksz % sndbuf_getalign(b);
1954 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo,
1956 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods,
1957 c->devinfo, hblksz));
1965 if (c->direction == PCMDIR_PLAY) {
1967 nsblkcnt--;
1992 sblksz -= sblksz % sndbuf_getalign(bs);
1998 device_printf(c->dev, "%s(): Failed: %d %d\n",
2007 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) /
2009 if (c->parentchannel != NULL)
2010 c->timeout = min(c->timeout, c->parentchannel->timeout);
2011 if (c->timeout < 1)
2012 c->timeout = 1;
2018 c->lw = sndbuf_getblksz(bs);
2022 device_printf(c->dev, "%s(): %s (%s) timeout=%u "
2025 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware",
2026 c->timeout,
2040 return chn_resizebuf(c, latency, -1, 0);
2048 return chn_resizebuf(c, -1, blkcnt, blksz);
2063 c->format = format;
2064 c->speed = speed;
2069 RANGE(hwspeed, caps->minspeed, caps->maxspeed);
2071 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo,
2073 hwspeed = sndbuf_getspd(c->bufhard);
2075 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed);
2078 c->speed = hwspeed;
2083 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo,
2084 sndbuf_getfmt(c->bufhard));
2087 ret = chn_resizebuf(c, -2, 0, 0);
2098 oldformat = c->format;
2099 oldspeed = c->speed;
2105 device_printf(c->dev,
2109 chn_setparam(c, c->format, oldspeed);
2127 oldformat = c->format;
2128 oldspeed = c->speed;
2134 device_printf(c->dev,
2150 d = (c != NULL) ? c->parentsnddev : NULL;
2151 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 :
2159 if (c->feederflags & (1 << FEEDER_VOLUME)) {
2163 if (c->direction == PCMDIR_PLAY &&
2164 (d->flags & SD_F_SOFTPCMVOL)) {
2178 if (vol == -1) {
2179 device_printf(c->dev,
2180 "Soft PCM Volume: Failed to read pcm "
2185 if (pvol == -1) {
2186 device_printf(c->dev,
2187 "Soft PCM Volume: Failed to read parent "
2199 if (c->feederflags & (1 << FEEDER_EQ)) {
2208 if (treble == -1)
2214 if (bass == -1)
2222 device_printf(c->dev,
2223 "EQ: Failed to set treble -- %d\n",
2226 device_printf(c->dev,
2227 "EQ: Failed to set bass -- %d\n",
2229 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0)
2230 device_printf(c->dev,
2231 "EQ: Failed to set preamp -- %d\n",
2232 d->eqpreamp);
2233 if (d->flags & SD_F_EQ_BYPASSED)
2235 else if (d->flags & SD_F_EQ_ENABLED)
2240 device_printf(c->dev,
2241 "EQ: Failed to set state -- %d\n", state);
2249 struct snddev_info *d = c->parentsnddev;
2254 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go));
2256 if (go == c->trigger)
2260 device_printf(c->dev, "%s() %s: calling go=0x%08x , "
2261 "prev=0x%08x\n", __func__, c->name, go, c->trigger);
2264 c->trigger = go;
2265 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
2277 if (go != c->trigger) {
2288 CHN_INSERT_HEAD_SAFE(d, c, channels.pcm.busy);
2294 CHN_REMOVE(d, c, channels.pcm.busy);
2306 * @brief Queries sound driver for sample-aligned hardware buffer pointer index
2309 * the current bytes-per-sample value before returning. (E.g., a channel
2310 * running in 16 bit stereo mode would require 4 bytes per sample, so a
2311 * hwptr value ranging from 32-35 would be returned as 32.)
2313 * @param c PCM channel context
2314 * @returns sample-aligned hardware buffer pointer index
2322 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
2323 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard)));
2330 return CHANNEL_GETCAPS(c->methods, c->devinfo);
2339 fmtlist = chn_getcaps(c)->fmtlist;
2344 /* report software-supported formats */
2406 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) {
2416 if (c->direction == PCMDIR_PLAY) {
2417 vchanformat = &c->parentsnddev->pvchanformat;
2418 vchanrate = &c->parentsnddev->pvchanrate;
2420 vchanformat = &c->parentsnddev->rvchanformat;
2421 vchanrate = &c->parentsnddev->rvchanrate;
2425 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) {
2441 if ((ch->format & AFMT_PASSTHROUGH) &&
2442 snd_fmtvalid(ch->format, caps->fmtlist)) {
2443 bestformat = ch->format;
2444 bestspeed = ch->speed;
2450 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) {
2451 if (c->flags & CHN_F_VCHAN_ADAPTIVE) {
2452 bestspeed = ch->speed;
2453 RANGE(bestspeed, caps->minspeed,
2454 caps->maxspeed);
2455 besthwformat = snd_fmtbest(ch->format,
2456 caps->fmtlist);
2465 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) ||
2471 if (ch->speed > bestspeed) {
2472 bestspeed = ch->speed;
2473 RANGE(bestspeed, caps->minspeed,
2474 caps->maxspeed);
2476 besthwformat = snd_fmtbest(ch->format, caps->fmtlist);
2494 bestformat = c->format;
2496 bestspeed = c->speed;
2498 if (bestformat != c->format || bestspeed != c->speed)
2501 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
2502 c->flags |= vpflags;
2506 bestspeed = CHANNEL_SETSPEED(c->methods,
2507 c->devinfo, bestspeed);
2520 c->flags |= CHN_F_DIRTY;
2527 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo,
2539 c->flags |= CHN_F_DIRTY;
2551 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
2555 if (c->format != bestformat || c->speed != bestspeed)
2571 * should examine rates @b only if this function returns non-zero.
2573 * @param c pcm channel to examine
2583 return CHANNEL_GETRATES(c->methods, c->devinfo, rates);
2587 * @brief Remove channel from a sync group, if there is one.
2590 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl)
2591 * - Closing a device. (A channel can't be destroyed if it's still in use.)
2614 if (c->sm != NULL) {
2615 sm = c->sm;
2616 sg = sm->parent;
2617 c->sm = NULL;
2621 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link);
2624 if (SLIST_EMPTY(&sg->members)) {
2626 sg_id = sg->id;
2639 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak);