2 * Copyright (c) 1999 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/buffer.c,v 1.25.2.3 2007/04/26 08:21:43 ariff Exp $
29 #include <dev/sound/pcm/sound.h>
31 #include "feeder_if.h"
33 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/buffer.c,v 1.11 2008/01/06 16:55:51 swildner Exp $");
38 * sndbuf_kqtask is a taskqueue callback routine, called from
39 * taskqueue_swi, which runs under the MP lock.
41 * The only purpose is to be able to KNOTE() from a sound
42 * interrupt, which is running without MP lock held and thus
43 * can't call KNOTE() directly.
46 sndbuf_kqtask(void *context, int pending)
48 struct snd_dbuf *b = context;
49 struct kqinfo *ki = sndbuf_getkq(b);
51 KNOTE(&ki->ki_note, 0);
55 sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel)
59 b = kmalloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO);
60 ksnprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc);
63 TASK_INIT(&b->kqtask, 0, sndbuf_kqtask, b);
69 sndbuf_destroy(struct snd_dbuf *b)
76 sndbuf_getbufaddr(struct snd_dbuf *buf)
78 return (buf->buf_addr);
82 sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
84 struct snd_dbuf *b = (struct snd_dbuf *)arg;
87 device_printf(b->dev, "sndbuf_setmap %lx, %lx; ",
88 (u_long)segs[0].ds_addr, (u_long)segs[0].ds_len);
89 kprintf("%p -> %lx\n", b->buf, (u_long)segs[0].ds_addr);
92 b->buf_addr = segs[0].ds_addr;
98 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
99 * the driver can call kmalloc(9) and sndbuf_setup() itself.
103 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
109 b->bufsize = b->maxsize;
111 b->flags |= SNDBUF_F_MANAGED;
112 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT,
117 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize,
118 sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) {
123 ret = sndbuf_resize(b, 2, b->maxsize / 2);
131 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
133 b->flags &= ~SNDBUF_F_MANAGED;
135 b->flags |= SNDBUF_F_MANAGED;
138 b->bufsize = b->maxsize;
139 return sndbuf_resize(b, 2, b->maxsize / 2);
143 sndbuf_free(struct snd_dbuf *b)
146 kfree(b->tmpbuf, M_DEVBUF);
148 if (b->flags & SNDBUF_F_MANAGED) {
150 bus_dmamap_unload(b->dmatag, b->dmamap);
152 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
154 kfree(b->buf, M_DEVBUF);
164 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
166 u_int8_t *tmpbuf, *f2;
168 chn_lock(b->channel);
175 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) {
176 chn_unlock(b->channel);
179 if (blkcnt == b->blkcnt && blksz == b->blksz)
182 chn_unlock(b->channel);
183 tmpbuf = kmalloc(blkcnt * blksz, M_DEVBUF, M_WAITOK);
184 chn_lock(b->channel);
187 b->bufsize = blkcnt * blksz;
191 chn_unlock(b->channel);
196 chn_unlock(b->channel);
201 sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
203 u_int8_t *buf, *tmpbuf, *f1, *f2;
204 unsigned int bufsize;
207 if (blkcnt < 2 || blksz < 16)
210 bufsize = blksz * blkcnt;
212 chn_unlock(b->channel);
213 buf = kmalloc(bufsize, M_DEVBUF, M_WAITOK);
214 tmpbuf = kmalloc(bufsize, M_DEVBUF, M_WAITOK);
215 chn_lock(b->channel);
219 b->bufsize = bufsize;
220 b->maxsize = bufsize;
228 chn_unlock(b->channel);
235 chn_lock(b->channel);
240 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
247 if (length > b->bufsize)
250 if (b->fmt & AFMT_SIGNED)
255 i = sndbuf_getfreeptr(b);
256 p = sndbuf_getbuf(b);
267 sndbuf_fillsilence(struct snd_dbuf *b)
272 if (b->fmt & AFMT_SIGNED)
278 p = sndbuf_getbuf(b);
279 while (i < b->bufsize)
286 sndbuf_reset(struct snd_dbuf *b)
295 if (b->buf && b->bufsize > 0)
296 sndbuf_clear(b, b->bufsize);
300 sndbuf_getfmt(struct snd_dbuf *b)
306 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
310 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
311 if (b->fmt & AFMT_16BIT)
313 else if (b->fmt & AFMT_24BIT)
315 else if (b->fmt & AFMT_32BIT)
321 sndbuf_getspd(struct snd_dbuf *b)
327 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
333 sndbuf_getalign(struct snd_dbuf *b)
335 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
337 return align[b->bps - 1];
341 sndbuf_getblkcnt(struct snd_dbuf *b)
347 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
353 sndbuf_getblksz(struct snd_dbuf *b)
359 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
365 sndbuf_getbps(struct snd_dbuf *b)
371 sndbuf_getbuf(struct snd_dbuf *b)
377 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
379 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
385 sndbuf_getsize(struct snd_dbuf *b)
391 sndbuf_getmaxsize(struct snd_dbuf *b)
397 sndbuf_runsz(struct snd_dbuf *b)
403 sndbuf_setrun(struct snd_dbuf *b, int go)
405 b->dl = go? b->blksz : 0;
409 sndbuf_getkq(struct snd_dbuf *b)
414 /************************************************************/
416 sndbuf_getxrun(struct snd_dbuf *b)
418 SNDBUF_LOCKASSERT(b);
424 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
426 SNDBUF_LOCKASSERT(b);
432 sndbuf_gethwptr(struct snd_dbuf *b)
434 SNDBUF_LOCKASSERT(b);
440 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
442 SNDBUF_LOCKASSERT(b);
448 sndbuf_getready(struct snd_dbuf *b)
450 SNDBUF_LOCKASSERT(b);
451 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
457 sndbuf_getreadyptr(struct snd_dbuf *b)
459 SNDBUF_LOCKASSERT(b);
460 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
466 sndbuf_getfree(struct snd_dbuf *b)
468 SNDBUF_LOCKASSERT(b);
469 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
471 return b->bufsize - b->rl;
475 sndbuf_getfreeptr(struct snd_dbuf *b)
477 SNDBUF_LOCKASSERT(b);
478 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
479 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
481 return (b->rp + b->rl) % b->bufsize;
485 sndbuf_getblocks(struct snd_dbuf *b)
487 SNDBUF_LOCKASSERT(b);
489 return b->total / b->blksz;
493 sndbuf_getprevblocks(struct snd_dbuf *b)
495 SNDBUF_LOCKASSERT(b);
497 return b->prev_total / b->blksz;
501 sndbuf_gettotal(struct snd_dbuf *b)
503 SNDBUF_LOCKASSERT(b);
509 sndbuf_updateprevtotal(struct snd_dbuf *b)
511 SNDBUF_LOCKASSERT(b);
513 b->prev_total = b->total;
516 /************************************************************/
519 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
523 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > kfree %d", __func__, count, sndbuf_getfree(b)));
524 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
528 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
529 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
536 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
542 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
546 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
547 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
550 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
551 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
554 b->rp = (b->rp + l) % b->bufsize;
559 b->rp = (b->rp + count) % b->bufsize;
561 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
566 /* count is number of bytes we want added to destination buffer */
568 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
570 KASSERT(count > 0, ("can't feed 0 bytes"));
572 if (sndbuf_getfree(to) < count)
575 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
577 sndbuf_acquire(to, to->tmpbuf, count);
578 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
583 /************************************************************/
586 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
590 kprintf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
592 kprintf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
594 kprintf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
596 kprintf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
598 kprintf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
602 /************************************************************/
604 sndbuf_getflags(struct snd_dbuf *b)
610 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)