1 /*
2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <dev/sound/pcm/sound.h>
28
29 #include "feeder_if.h"
30
31 SND_DECLARE_FILE("$FreeBSD: releng/5.3/sys/dev/sound/pcm/buffer.c 128730 2004-04-29 02:51:59Z green $");
32
33 struct snd_dbuf *
34 sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel)
35 {
36 struct snd_dbuf *b;
37
38 b = malloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO);
39 snprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc);
40 b->dev = dev;
41 b->channel = channel;
42
43 return b;
44 }
45
46 void
47 sndbuf_destroy(struct snd_dbuf *b)
48 {
49 free(b, M_DEVBUF);
50 }
51
52 bus_addr_t
53 sndbuf_getbufaddr(struct snd_dbuf *buf)
54 {
55 return (buf->buf_addr);
56 }
57
58 static void
59 sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
60 {
61 struct snd_dbuf *b = (struct snd_dbuf *)arg;
62
63 if (bootverbose) {
64 device_printf(b->dev, "sndbuf_setmap %lx, %lx; ", (unsigned long)segs->ds_addr,
65 (unsigned long)segs->ds_len);
66 printf("%p -> %lx\n", b->buf, (unsigned long)vtophys(b->buf));
67 }
68 b->buf_addr = segs->ds_addr;
69 }
70
71 /*
72 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
73 * the driver can call malloc(9) and sndbuf_setup() itself.
74 */
75
76 int
77 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
78 {
79 b->dmatag = dmatag;
80 b->maxsize = size;
81 b->bufsize = b->maxsize;
82 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT, &b->dmamap))
83 return ENOSPC;
84 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize, sndbuf_setmap, b, 0))
85 return ENOSPC;
86 return sndbuf_resize(b, 2, b->maxsize / 2);
87 }
88
89 int
90 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
91 {
92 b->buf = buf;
93 b->maxsize = size;
94 b->bufsize = b->maxsize;
95 return sndbuf_resize(b, 2, b->maxsize / 2);
96 }
97
98 void
99 sndbuf_free(struct snd_dbuf *b)
100 {
101 if (b->tmpbuf)
102 free(b->tmpbuf, M_DEVBUF);
103 b->tmpbuf = NULL;
104
105 if (b->dmamap)
106 bus_dmamap_unload(b->dmatag, b->dmamap);
107
108 if (b->dmamap && b->buf)
109 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
110 b->dmamap = NULL;
111 b->buf = NULL;
112 }
113
114 int
115 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
116 {
117 u_int8_t *tmpbuf, *f2;
118
119 chn_lock(b->channel);
120 if (b->maxsize == 0)
121 goto out;
122 if (blkcnt == 0)
123 blkcnt = b->blkcnt;
124 if (blksz == 0)
125 blksz = b->blksz;
126 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) {
127 chn_unlock(b->channel);
128 return EINVAL;
129 }
130 if (blkcnt == b->blkcnt && blksz == b->blksz)
131 goto out;
132
133 chn_unlock(b->channel);
134 tmpbuf = malloc(blkcnt * blksz, M_DEVBUF, M_NOWAIT);
135 if (tmpbuf == NULL)
136 return ENOMEM;
137 chn_lock(b->channel);
138 b->blkcnt = blkcnt;
139 b->blksz = blksz;
140 b->bufsize = blkcnt * blksz;
141 f2 = b->tmpbuf;
142 b->tmpbuf = tmpbuf;
143 sndbuf_reset(b);
144 chn_unlock(b->channel);
145 free(f2, M_DEVBUF);
146 return 0;
147 out:
148 chn_unlock(b->channel);
149 return 0;
150 }
151
152 int
153 sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
154 {
155 u_int8_t *buf, *tmpbuf, *f1, *f2;
156 unsigned int bufsize;
157 int ret;
158
159 if (blkcnt < 2 || blksz < 16)
160 return EINVAL;
161
162 bufsize = blksz * blkcnt;
163
164 chn_unlock(b->channel);
165 buf = malloc(bufsize, M_DEVBUF, M_WAITOK);
166 if (buf == NULL) {
167 ret = ENOMEM;
168 goto out;
169 }
170
171 tmpbuf = malloc(bufsize, M_DEVBUF, M_WAITOK);
172 if (tmpbuf == NULL) {
173 free(buf, M_DEVBUF);
174 ret = ENOMEM;
175 goto out;
176 }
177 chn_lock(b->channel);
178
179 b->blkcnt = blkcnt;
180 b->blksz = blksz;
181 b->bufsize = bufsize;
182 b->maxsize = bufsize;
183 f1 = b->buf;
184 f2 = b->tmpbuf;
185 b->buf = buf;
186 b->tmpbuf = tmpbuf;
187
188 sndbuf_reset(b);
189
190 chn_unlock(b->channel);
191 if (f1)
192 free(f1, M_DEVBUF);
193 if (f2)
194 free(f2, M_DEVBUF);
195
196 ret = 0;
197 out:
198 chn_lock(b->channel);
199 return ret;
200 }
201
202 void
203 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
204 {
205 int i;
206 u_char data, *p;
207
208 if (length == 0)
209 return;
210 if (length > b->bufsize)
211 length = b->bufsize;
212
213 if (b->fmt & AFMT_SIGNED)
214 data = 0x00;
215 else
216 data = 0x80;
217
218 i = sndbuf_getfreeptr(b);
219 p = sndbuf_getbuf(b);
220 while (length > 0) {
221 p[i] = data;
222 length--;
223 i++;
224 if (i >= b->bufsize)
225 i = 0;
226 }
227 }
228
229 void
230 sndbuf_fillsilence(struct snd_dbuf *b)
231 {
232 int i;
233 u_char data, *p;
234
235 if (b->fmt & AFMT_SIGNED)
236 data = 0x00;
237 else
238 data = 0x80;
239
240 i = 0;
241 p = sndbuf_getbuf(b);
242 while (i < b->bufsize)
243 p[i++] = data;
244 b->rp = 0;
245 b->rl = b->bufsize;
246 }
247
248 void
249 sndbuf_reset(struct snd_dbuf *b)
250 {
251 b->hp = 0;
252 b->rp = 0;
253 b->rl = 0;
254 b->dl = 0;
255 b->prev_total = 0;
256 b->total = 0;
257 b->xrun = 0;
258 if (b->buf && b->bufsize > 0)
259 sndbuf_clear(b, b->bufsize);
260 }
261
262 u_int32_t
263 sndbuf_getfmt(struct snd_dbuf *b)
264 {
265 return b->fmt;
266 }
267
268 int
269 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
270 {
271 b->fmt = fmt;
272 b->bps = 1;
273 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
274 b->bps <<= (b->fmt & AFMT_16BIT)? 1 : 0;
275 b->bps <<= (b->fmt & AFMT_32BIT)? 2 : 0;
276 return 0;
277 }
278
279 unsigned int
280 sndbuf_getspd(struct snd_dbuf *b)
281 {
282 return b->spd;
283 }
284
285 void
286 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
287 {
288 b->spd = spd;
289 }
290
291 unsigned int
292 sndbuf_getalign(struct snd_dbuf *b)
293 {
294 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
295
296 return align[b->bps - 1];
297 }
298
299 unsigned int
300 sndbuf_getblkcnt(struct snd_dbuf *b)
301 {
302 return b->blkcnt;
303 }
304
305 void
306 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
307 {
308 b->blkcnt = blkcnt;
309 }
310
311 unsigned int
312 sndbuf_getblksz(struct snd_dbuf *b)
313 {
314 return b->blksz;
315 }
316
317 void
318 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
319 {
320 b->blksz = blksz;
321 }
322
323 unsigned int
324 sndbuf_getbps(struct snd_dbuf *b)
325 {
326 return b->bps;
327 }
328
329 void *
330 sndbuf_getbuf(struct snd_dbuf *b)
331 {
332 return b->buf;
333 }
334
335 void *
336 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
337 {
338 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
339
340 return b->buf + ofs;
341 }
342
343 unsigned int
344 sndbuf_getsize(struct snd_dbuf *b)
345 {
346 return b->bufsize;
347 }
348
349 unsigned int
350 sndbuf_getmaxsize(struct snd_dbuf *b)
351 {
352 return b->maxsize;
353 }
354
355 unsigned int
356 sndbuf_runsz(struct snd_dbuf *b)
357 {
358 return b->dl;
359 }
360
361 void
362 sndbuf_setrun(struct snd_dbuf *b, int go)
363 {
364 b->dl = go? b->blksz : 0;
365 }
366
367 struct selinfo *
368 sndbuf_getsel(struct snd_dbuf *b)
369 {
370 return &b->sel;
371 }
372
373 /************************************************************/
374 unsigned int
375 sndbuf_getxrun(struct snd_dbuf *b)
376 {
377 SNDBUF_LOCKASSERT(b);
378
379 return b->xrun;
380 }
381
382 void
383 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
384 {
385 SNDBUF_LOCKASSERT(b);
386
387 b->xrun = cnt;
388 }
389
390 unsigned int
391 sndbuf_gethwptr(struct snd_dbuf *b)
392 {
393 SNDBUF_LOCKASSERT(b);
394
395 return b->hp;
396 }
397
398 void
399 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
400 {
401 SNDBUF_LOCKASSERT(b);
402
403 b->hp = ptr;
404 }
405
406 unsigned int
407 sndbuf_getready(struct snd_dbuf *b)
408 {
409 SNDBUF_LOCKASSERT(b);
410 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
411
412 return b->rl;
413 }
414
415 unsigned int
416 sndbuf_getreadyptr(struct snd_dbuf *b)
417 {
418 SNDBUF_LOCKASSERT(b);
419 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
420
421 return b->rp;
422 }
423
424 unsigned int
425 sndbuf_getfree(struct snd_dbuf *b)
426 {
427 SNDBUF_LOCKASSERT(b);
428 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
429
430 return b->bufsize - b->rl;
431 }
432
433 unsigned int
434 sndbuf_getfreeptr(struct snd_dbuf *b)
435 {
436 SNDBUF_LOCKASSERT(b);
437 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
438 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
439
440 return (b->rp + b->rl) % b->bufsize;
441 }
442
443 unsigned int
444 sndbuf_getblocks(struct snd_dbuf *b)
445 {
446 SNDBUF_LOCKASSERT(b);
447
448 return b->total / b->blksz;
449 }
450
451 unsigned int
452 sndbuf_getprevblocks(struct snd_dbuf *b)
453 {
454 SNDBUF_LOCKASSERT(b);
455
456 return b->prev_total / b->blksz;
457 }
458
459 unsigned int
460 sndbuf_gettotal(struct snd_dbuf *b)
461 {
462 SNDBUF_LOCKASSERT(b);
463
464 return b->total;
465 }
466
467 void
468 sndbuf_updateprevtotal(struct snd_dbuf *b)
469 {
470 SNDBUF_LOCKASSERT(b);
471
472 b->prev_total = b->total;
473 }
474
475 /************************************************************/
476
477 int
478 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
479 {
480 int l;
481
482 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > free %d", __func__, count, sndbuf_getfree(b)));
483 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
484 b->total += count;
485 if (from != NULL) {
486 while (count > 0) {
487 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
488 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
489 from += l;
490 b->rl += l;
491 count -= l;
492 }
493 } else
494 b->rl += count;
495 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
496
497 return 0;
498 }
499
500 int
501 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
502 {
503 int l;
504
505 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
506 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
507 if (to != NULL) {
508 while (count > 0) {
509 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
510 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
511 to += l;
512 b->rl -= l;
513 b->rp = (b->rp + l) % b->bufsize;
514 count -= l;
515 }
516 } else {
517 b->rl -= count;
518 b->rp = (b->rp + count) % b->bufsize;
519 }
520 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
521
522 return 0;
523 }
524
525 /* count is number of bytes we want added to destination buffer */
526 int
527 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
528 {
529 KASSERT(count > 0, ("can't feed 0 bytes"));
530
531 if (sndbuf_getfree(to) < count)
532 return EINVAL;
533
534 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
535 if (count)
536 sndbuf_acquire(to, to->tmpbuf, count);
537 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
538
539 return 0;
540 }
541
542 /************************************************************/
543
544 void
545 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
546 {
547 printf("%s: [", s);
548 if (what & 0x01)
549 printf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
550 if (what & 0x02)
551 printf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
552 if (what & 0x04)
553 printf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
554 if (what & 0x08)
555 printf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
556 if (what & 0x10)
557 printf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
558 printf(" ]\n");
559 }
560
561 /************************************************************/
562 u_int32_t
563 sndbuf_getflags(struct snd_dbuf *b)
564 {
565 return b->flags;
566 }
567
568 void
569 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)
570 {
571 b->flags &= ~flags;
572 if (on)
573 b->flags |= flags;
574 }
575
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