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 $
27 * $DragonFly: src/sys/dev/sound/pcm/buffer.c,v 1.10 2008/01/05 13:34:22 corecode Exp $
30 #include <dev/sound/pcm/sound.h>
32 #include "feeder_if.h"
34 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/buffer.c,v 1.10 2008/01/05 13:34:22 corecode Exp $");
37 * sndbuf_seltask is a taskqueue callback routine, called from
38 * taskqueue_swi, which runs under the MP lock.
40 * The only purpose is to be able to selwakeup() from a sound
41 * interrupt, which is running without MP lock held and thus
42 * can't call selwakeup() directly.
45 sndbuf_seltask(void *context, int pending)
47 struct snd_dbuf *b = context;
49 selwakeup(sndbuf_getsel(b));
53 sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel)
57 b = kmalloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO);
58 ksnprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc);
61 TASK_INIT(&b->seltask, 0, sndbuf_seltask, b);
67 sndbuf_destroy(struct snd_dbuf *b)
74 sndbuf_getbufaddr(struct snd_dbuf *buf)
76 return (buf->buf_addr);
80 sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
82 struct snd_dbuf *b = (struct snd_dbuf *)arg;
85 device_printf(b->dev, "sndbuf_setmap %lx, %lx; ",
86 (u_long)segs[0].ds_addr, (u_long)segs[0].ds_len);
87 kprintf("%p -> %lx\n", b->buf, (u_long)segs[0].ds_addr);
90 b->buf_addr = segs[0].ds_addr;
96 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
97 * the driver can call kmalloc(9) and sndbuf_setup() itself.
101 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
107 b->bufsize = b->maxsize;
109 b->flags |= SNDBUF_F_MANAGED;
110 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT,
115 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize,
116 sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) {
121 ret = sndbuf_resize(b, 2, b->maxsize / 2);
129 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
131 b->flags &= ~SNDBUF_F_MANAGED;
133 b->flags |= SNDBUF_F_MANAGED;
136 b->bufsize = b->maxsize;
137 return sndbuf_resize(b, 2, b->maxsize / 2);
141 sndbuf_free(struct snd_dbuf *b)
144 kfree(b->tmpbuf, M_DEVBUF);
146 if (b->flags & SNDBUF_F_MANAGED) {
148 bus_dmamap_unload(b->dmatag, b->dmamap);
150 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
152 kfree(b->buf, M_DEVBUF);
162 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
164 u_int8_t *tmpbuf, *f2;
166 chn_lock(b->channel);
173 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) {
174 chn_unlock(b->channel);
177 if (blkcnt == b->blkcnt && blksz == b->blksz)
180 chn_unlock(b->channel);
181 tmpbuf = kmalloc(blkcnt * blksz, M_DEVBUF, M_NOWAIT);
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);
219 tmpbuf = kmalloc(bufsize, M_DEVBUF, M_WAITOK);
220 if (tmpbuf == NULL) {
221 kfree(buf, M_DEVBUF);
225 chn_lock(b->channel);
229 b->bufsize = bufsize;
230 b->maxsize = bufsize;
238 chn_unlock(b->channel);
246 chn_lock(b->channel);
251 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
258 if (length > b->bufsize)
261 if (b->fmt & AFMT_SIGNED)
266 i = sndbuf_getfreeptr(b);
267 p = sndbuf_getbuf(b);
278 sndbuf_fillsilence(struct snd_dbuf *b)
283 if (b->fmt & AFMT_SIGNED)
289 p = sndbuf_getbuf(b);
290 while (i < b->bufsize)
297 sndbuf_reset(struct snd_dbuf *b)
306 if (b->buf && b->bufsize > 0)
307 sndbuf_clear(b, b->bufsize);
311 sndbuf_getfmt(struct snd_dbuf *b)
317 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
321 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
322 if (b->fmt & AFMT_16BIT)
324 else if (b->fmt & AFMT_24BIT)
326 else if (b->fmt & AFMT_32BIT)
332 sndbuf_getspd(struct snd_dbuf *b)
338 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
344 sndbuf_getalign(struct snd_dbuf *b)
346 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
348 return align[b->bps - 1];
352 sndbuf_getblkcnt(struct snd_dbuf *b)
358 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
364 sndbuf_getblksz(struct snd_dbuf *b)
370 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
376 sndbuf_getbps(struct snd_dbuf *b)
382 sndbuf_getbuf(struct snd_dbuf *b)
388 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
390 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
396 sndbuf_getsize(struct snd_dbuf *b)
402 sndbuf_getmaxsize(struct snd_dbuf *b)
408 sndbuf_runsz(struct snd_dbuf *b)
414 sndbuf_setrun(struct snd_dbuf *b, int go)
416 b->dl = go? b->blksz : 0;
420 sndbuf_getsel(struct snd_dbuf *b)
425 /************************************************************/
427 sndbuf_getxrun(struct snd_dbuf *b)
429 SNDBUF_LOCKASSERT(b);
435 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
437 SNDBUF_LOCKASSERT(b);
443 sndbuf_gethwptr(struct snd_dbuf *b)
445 SNDBUF_LOCKASSERT(b);
451 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
453 SNDBUF_LOCKASSERT(b);
459 sndbuf_getready(struct snd_dbuf *b)
461 SNDBUF_LOCKASSERT(b);
462 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
468 sndbuf_getreadyptr(struct snd_dbuf *b)
470 SNDBUF_LOCKASSERT(b);
471 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
477 sndbuf_getfree(struct snd_dbuf *b)
479 SNDBUF_LOCKASSERT(b);
480 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
482 return b->bufsize - b->rl;
486 sndbuf_getfreeptr(struct snd_dbuf *b)
488 SNDBUF_LOCKASSERT(b);
489 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
490 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
492 return (b->rp + b->rl) % b->bufsize;
496 sndbuf_getblocks(struct snd_dbuf *b)
498 SNDBUF_LOCKASSERT(b);
500 return b->total / b->blksz;
504 sndbuf_getprevblocks(struct snd_dbuf *b)
506 SNDBUF_LOCKASSERT(b);
508 return b->prev_total / b->blksz;
512 sndbuf_gettotal(struct snd_dbuf *b)
514 SNDBUF_LOCKASSERT(b);
520 sndbuf_updateprevtotal(struct snd_dbuf *b)
522 SNDBUF_LOCKASSERT(b);
524 b->prev_total = b->total;
527 /************************************************************/
530 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
534 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > kfree %d", __func__, count, sndbuf_getfree(b)));
535 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
539 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
540 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
547 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
553 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
557 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
558 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
561 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
562 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
565 b->rp = (b->rp + l) % b->bufsize;
570 b->rp = (b->rp + count) % b->bufsize;
572 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
577 /* count is number of bytes we want added to destination buffer */
579 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
581 KASSERT(count > 0, ("can't feed 0 bytes"));
583 if (sndbuf_getfree(to) < count)
586 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
588 sndbuf_acquire(to, to->tmpbuf, count);
589 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
594 /************************************************************/
597 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
601 kprintf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
603 kprintf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
605 kprintf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
607 kprintf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
609 kprintf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
613 /************************************************************/
615 sndbuf_getflags(struct snd_dbuf *b)
621 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)