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 1.25.2.1 2005/12/30 19:55:54 netchild Exp $
27 * $DragonFly: src/sys/dev/sound/pcm/buffer.c,v 1.8 2007/01/04 21:47:03 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 1.8 2007/01/04 21:47:03 corecode Exp $");
37 sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel)
41 b = kmalloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO);
42 ksnprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc);
50 sndbuf_destroy(struct snd_dbuf *b)
56 sndbuf_getbufaddr(struct snd_dbuf *buf)
58 return (buf->buf_addr);
62 sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
64 struct snd_dbuf *b = (struct snd_dbuf *)arg;
67 device_printf(b->dev, "sndbuf_setmap %lx, %lx; ",
68 (u_long)segs[0].ds_addr, (u_long)segs[0].ds_len);
69 kprintf("%p -> %lx\n", b->buf, (u_long)segs[0].ds_addr);
72 b->buf_addr = segs[0].ds_addr;
78 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
79 * the driver can call kmalloc(9) and sndbuf_setup() itself.
83 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
89 b->bufsize = b->maxsize;
91 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT,
94 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize,
95 sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) {
96 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
101 ret = sndbuf_resize(b, 2, b->maxsize / 2);
108 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
112 b->bufsize = b->maxsize;
113 return sndbuf_resize(b, 2, b->maxsize / 2);
117 sndbuf_free(struct snd_dbuf *b)
120 kfree(b->tmpbuf, M_DEVBUF);
124 bus_dmamap_unload(b->dmatag, b->dmamap);
126 if (b->dmamap && b->buf)
127 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
133 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
135 u_int8_t *tmpbuf, *f2;
137 chn_lock(b->channel);
144 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) {
145 chn_unlock(b->channel);
148 if (blkcnt == b->blkcnt && blksz == b->blksz)
151 chn_unlock(b->channel);
152 tmpbuf = kmalloc(blkcnt * blksz, M_DEVBUF, M_NOWAIT);
155 chn_lock(b->channel);
158 b->bufsize = blkcnt * blksz;
162 chn_unlock(b->channel);
167 chn_unlock(b->channel);
172 sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
174 u_int8_t *buf, *tmpbuf, *f1, *f2;
175 unsigned int bufsize;
178 if (blkcnt < 2 || blksz < 16)
181 bufsize = blksz * blkcnt;
183 chn_unlock(b->channel);
184 buf = kmalloc(bufsize, M_DEVBUF, M_WAITOK);
190 tmpbuf = kmalloc(bufsize, M_DEVBUF, M_WAITOK);
191 if (tmpbuf == NULL) {
192 kfree(buf, M_DEVBUF);
196 chn_lock(b->channel);
200 b->bufsize = bufsize;
201 b->maxsize = bufsize;
209 chn_unlock(b->channel);
217 chn_lock(b->channel);
222 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
229 if (length > b->bufsize)
232 if (b->fmt & AFMT_SIGNED)
237 i = sndbuf_getfreeptr(b);
238 p = sndbuf_getbuf(b);
249 sndbuf_fillsilence(struct snd_dbuf *b)
254 if (b->fmt & AFMT_SIGNED)
260 p = sndbuf_getbuf(b);
261 while (i < b->bufsize)
268 sndbuf_reset(struct snd_dbuf *b)
277 if (b->buf && b->bufsize > 0)
278 sndbuf_clear(b, b->bufsize);
282 sndbuf_getfmt(struct snd_dbuf *b)
288 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
292 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
293 if (b->fmt & AFMT_16BIT)
295 else if (b->fmt & AFMT_24BIT)
297 else if (b->fmt & AFMT_32BIT)
303 sndbuf_getspd(struct snd_dbuf *b)
309 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
315 sndbuf_getalign(struct snd_dbuf *b)
317 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
319 return align[b->bps - 1];
323 sndbuf_getblkcnt(struct snd_dbuf *b)
329 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
335 sndbuf_getblksz(struct snd_dbuf *b)
341 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
347 sndbuf_getbps(struct snd_dbuf *b)
353 sndbuf_getbuf(struct snd_dbuf *b)
359 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
361 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
367 sndbuf_getsize(struct snd_dbuf *b)
373 sndbuf_getmaxsize(struct snd_dbuf *b)
379 sndbuf_runsz(struct snd_dbuf *b)
385 sndbuf_setrun(struct snd_dbuf *b, int go)
387 b->dl = go? b->blksz : 0;
391 sndbuf_getsel(struct snd_dbuf *b)
396 /************************************************************/
398 sndbuf_getxrun(struct snd_dbuf *b)
400 SNDBUF_LOCKASSERT(b);
406 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
408 SNDBUF_LOCKASSERT(b);
414 sndbuf_gethwptr(struct snd_dbuf *b)
416 SNDBUF_LOCKASSERT(b);
422 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
424 SNDBUF_LOCKASSERT(b);
430 sndbuf_getready(struct snd_dbuf *b)
432 SNDBUF_LOCKASSERT(b);
433 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
439 sndbuf_getreadyptr(struct snd_dbuf *b)
441 SNDBUF_LOCKASSERT(b);
442 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
448 sndbuf_getfree(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));
453 return b->bufsize - b->rl;
457 sndbuf_getfreeptr(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));
461 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
463 return (b->rp + b->rl) % b->bufsize;
467 sndbuf_getblocks(struct snd_dbuf *b)
469 SNDBUF_LOCKASSERT(b);
471 return b->total / b->blksz;
475 sndbuf_getprevblocks(struct snd_dbuf *b)
477 SNDBUF_LOCKASSERT(b);
479 return b->prev_total / b->blksz;
483 sndbuf_gettotal(struct snd_dbuf *b)
485 SNDBUF_LOCKASSERT(b);
491 sndbuf_updateprevtotal(struct snd_dbuf *b)
493 SNDBUF_LOCKASSERT(b);
495 b->prev_total = b->total;
498 /************************************************************/
501 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
505 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > kfree %d", __func__, count, sndbuf_getfree(b)));
506 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
510 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
511 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
518 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
524 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
528 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
529 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
532 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
533 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
536 b->rp = (b->rp + l) % b->bufsize;
541 b->rp = (b->rp + count) % b->bufsize;
543 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
548 /* count is number of bytes we want added to destination buffer */
550 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
552 KASSERT(count > 0, ("can't feed 0 bytes"));
554 if (sndbuf_getfree(to) < count)
557 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
559 sndbuf_acquire(to, to->tmpbuf, count);
560 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
565 /************************************************************/
568 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
572 kprintf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
574 kprintf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
576 kprintf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
578 kprintf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
580 kprintf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
584 /************************************************************/
586 sndbuf_getflags(struct snd_dbuf *b)
592 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)