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/5.4/sys/dev/sound/pcm/buffer.c 141016 2005-01-30 01:00:13Z imp $");
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; ",
65 (u_long)segs[0].ds_addr, (u_long)segs[0].ds_len);
66 printf("%p -> %lx\n", b->buf, (u_long)segs[0].ds_addr);
67 }
68 if (error == 0)
69 b->buf_addr = segs[0].ds_addr;
70 else
71 b->buf_addr = 0;
72 }
73
74 /*
75 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
76 * the driver can call malloc(9) and sndbuf_setup() itself.
77 */
78
79 int
80 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
81 {
82 int ret;
83
84 b->dmatag = dmatag;
85 b->maxsize = size;
86 b->bufsize = b->maxsize;
87 b->buf_addr = 0;
88 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT,
89 &b->dmamap))
90 return (ENOMEM);
91 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize,
92 sndbuf_setmap, b, 0) != 0 || b->buf_addr == 0) {
93 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
94 b->dmamap = NULL;
95 return (ENOMEM);
96 }
97
98 ret = sndbuf_resize(b, 2, b->maxsize / 2);
99 if (ret != 0)
100 sndbuf_free(b);
101 return (ret);
102 }
103
104 int
105 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
106 {
107 b->buf = buf;
108 b->maxsize = size;
109 b->bufsize = b->maxsize;
110 return sndbuf_resize(b, 2, b->maxsize / 2);
111 }
112
113 void
114 sndbuf_free(struct snd_dbuf *b)
115 {
116 if (b->tmpbuf)
117 free(b->tmpbuf, M_DEVBUF);
118 b->tmpbuf = NULL;
119
120 if (b->dmamap)
121 bus_dmamap_unload(b->dmatag, b->dmamap);
122
123 if (b->dmamap && b->buf)
124 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
125 b->dmamap = NULL;
126 b->buf = NULL;
127 }
128
129 int
130 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
131 {
132 u_int8_t *tmpbuf, *f2;
133
134 chn_lock(b->channel);
135 if (b->maxsize == 0)
136 goto out;
137 if (blkcnt == 0)
138 blkcnt = b->blkcnt;
139 if (blksz == 0)
140 blksz = b->blksz;
141 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize)) {
142 chn_unlock(b->channel);
143 return EINVAL;
144 }
145 if (blkcnt == b->blkcnt && blksz == b->blksz)
146 goto out;
147
148 chn_unlock(b->channel);
149 tmpbuf = malloc(blkcnt * blksz, M_DEVBUF, M_NOWAIT);
150 if (tmpbuf == NULL)
151 return ENOMEM;
152 chn_lock(b->channel);
153 b->blkcnt = blkcnt;
154 b->blksz = blksz;
155 b->bufsize = blkcnt * blksz;
156 f2 = b->tmpbuf;
157 b->tmpbuf = tmpbuf;
158 sndbuf_reset(b);
159 chn_unlock(b->channel);
160 free(f2, M_DEVBUF);
161 return 0;
162 out:
163 chn_unlock(b->channel);
164 return 0;
165 }
166
167 int
168 sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
169 {
170 u_int8_t *buf, *tmpbuf, *f1, *f2;
171 unsigned int bufsize;
172 int ret;
173
174 if (blkcnt < 2 || blksz < 16)
175 return EINVAL;
176
177 bufsize = blksz * blkcnt;
178
179 chn_unlock(b->channel);
180 buf = malloc(bufsize, M_DEVBUF, M_WAITOK);
181 if (buf == NULL) {
182 ret = ENOMEM;
183 goto out;
184 }
185
186 tmpbuf = malloc(bufsize, M_DEVBUF, M_WAITOK);
187 if (tmpbuf == NULL) {
188 free(buf, M_DEVBUF);
189 ret = ENOMEM;
190 goto out;
191 }
192 chn_lock(b->channel);
193
194 b->blkcnt = blkcnt;
195 b->blksz = blksz;
196 b->bufsize = bufsize;
197 b->maxsize = bufsize;
198 f1 = b->buf;
199 f2 = b->tmpbuf;
200 b->buf = buf;
201 b->tmpbuf = tmpbuf;
202
203 sndbuf_reset(b);
204
205 chn_unlock(b->channel);
206 if (f1)
207 free(f1, M_DEVBUF);
208 if (f2)
209 free(f2, M_DEVBUF);
210
211 ret = 0;
212 out:
213 chn_lock(b->channel);
214 return ret;
215 }
216
217 void
218 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
219 {
220 int i;
221 u_char data, *p;
222
223 if (length == 0)
224 return;
225 if (length > b->bufsize)
226 length = b->bufsize;
227
228 if (b->fmt & AFMT_SIGNED)
229 data = 0x00;
230 else
231 data = 0x80;
232
233 i = sndbuf_getfreeptr(b);
234 p = sndbuf_getbuf(b);
235 while (length > 0) {
236 p[i] = data;
237 length--;
238 i++;
239 if (i >= b->bufsize)
240 i = 0;
241 }
242 }
243
244 void
245 sndbuf_fillsilence(struct snd_dbuf *b)
246 {
247 int i;
248 u_char data, *p;
249
250 if (b->fmt & AFMT_SIGNED)
251 data = 0x00;
252 else
253 data = 0x80;
254
255 i = 0;
256 p = sndbuf_getbuf(b);
257 while (i < b->bufsize)
258 p[i++] = data;
259 b->rp = 0;
260 b->rl = b->bufsize;
261 }
262
263 void
264 sndbuf_reset(struct snd_dbuf *b)
265 {
266 b->hp = 0;
267 b->rp = 0;
268 b->rl = 0;
269 b->dl = 0;
270 b->prev_total = 0;
271 b->total = 0;
272 b->xrun = 0;
273 if (b->buf && b->bufsize > 0)
274 sndbuf_clear(b, b->bufsize);
275 }
276
277 u_int32_t
278 sndbuf_getfmt(struct snd_dbuf *b)
279 {
280 return b->fmt;
281 }
282
283 int
284 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
285 {
286 b->fmt = fmt;
287 b->bps = 1;
288 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
289 b->bps <<= (b->fmt & AFMT_16BIT)? 1 : 0;
290 b->bps <<= (b->fmt & AFMT_32BIT)? 2 : 0;
291 return 0;
292 }
293
294 unsigned int
295 sndbuf_getspd(struct snd_dbuf *b)
296 {
297 return b->spd;
298 }
299
300 void
301 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
302 {
303 b->spd = spd;
304 }
305
306 unsigned int
307 sndbuf_getalign(struct snd_dbuf *b)
308 {
309 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
310
311 return align[b->bps - 1];
312 }
313
314 unsigned int
315 sndbuf_getblkcnt(struct snd_dbuf *b)
316 {
317 return b->blkcnt;
318 }
319
320 void
321 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
322 {
323 b->blkcnt = blkcnt;
324 }
325
326 unsigned int
327 sndbuf_getblksz(struct snd_dbuf *b)
328 {
329 return b->blksz;
330 }
331
332 void
333 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
334 {
335 b->blksz = blksz;
336 }
337
338 unsigned int
339 sndbuf_getbps(struct snd_dbuf *b)
340 {
341 return b->bps;
342 }
343
344 void *
345 sndbuf_getbuf(struct snd_dbuf *b)
346 {
347 return b->buf;
348 }
349
350 void *
351 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
352 {
353 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
354
355 return b->buf + ofs;
356 }
357
358 unsigned int
359 sndbuf_getsize(struct snd_dbuf *b)
360 {
361 return b->bufsize;
362 }
363
364 unsigned int
365 sndbuf_getmaxsize(struct snd_dbuf *b)
366 {
367 return b->maxsize;
368 }
369
370 unsigned int
371 sndbuf_runsz(struct snd_dbuf *b)
372 {
373 return b->dl;
374 }
375
376 void
377 sndbuf_setrun(struct snd_dbuf *b, int go)
378 {
379 b->dl = go? b->blksz : 0;
380 }
381
382 struct selinfo *
383 sndbuf_getsel(struct snd_dbuf *b)
384 {
385 return &b->sel;
386 }
387
388 /************************************************************/
389 unsigned int
390 sndbuf_getxrun(struct snd_dbuf *b)
391 {
392 SNDBUF_LOCKASSERT(b);
393
394 return b->xrun;
395 }
396
397 void
398 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
399 {
400 SNDBUF_LOCKASSERT(b);
401
402 b->xrun = cnt;
403 }
404
405 unsigned int
406 sndbuf_gethwptr(struct snd_dbuf *b)
407 {
408 SNDBUF_LOCKASSERT(b);
409
410 return b->hp;
411 }
412
413 void
414 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
415 {
416 SNDBUF_LOCKASSERT(b);
417
418 b->hp = ptr;
419 }
420
421 unsigned int
422 sndbuf_getready(struct snd_dbuf *b)
423 {
424 SNDBUF_LOCKASSERT(b);
425 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
426
427 return b->rl;
428 }
429
430 unsigned int
431 sndbuf_getreadyptr(struct snd_dbuf *b)
432 {
433 SNDBUF_LOCKASSERT(b);
434 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
435
436 return b->rp;
437 }
438
439 unsigned int
440 sndbuf_getfree(struct snd_dbuf *b)
441 {
442 SNDBUF_LOCKASSERT(b);
443 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
444
445 return b->bufsize - b->rl;
446 }
447
448 unsigned int
449 sndbuf_getfreeptr(struct snd_dbuf *b)
450 {
451 SNDBUF_LOCKASSERT(b);
452 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
453 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
454
455 return (b->rp + b->rl) % b->bufsize;
456 }
457
458 unsigned int
459 sndbuf_getblocks(struct snd_dbuf *b)
460 {
461 SNDBUF_LOCKASSERT(b);
462
463 return b->total / b->blksz;
464 }
465
466 unsigned int
467 sndbuf_getprevblocks(struct snd_dbuf *b)
468 {
469 SNDBUF_LOCKASSERT(b);
470
471 return b->prev_total / b->blksz;
472 }
473
474 unsigned int
475 sndbuf_gettotal(struct snd_dbuf *b)
476 {
477 SNDBUF_LOCKASSERT(b);
478
479 return b->total;
480 }
481
482 void
483 sndbuf_updateprevtotal(struct snd_dbuf *b)
484 {
485 SNDBUF_LOCKASSERT(b);
486
487 b->prev_total = b->total;
488 }
489
490 /************************************************************/
491
492 int
493 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
494 {
495 int l;
496
497 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > free %d", __func__, count, sndbuf_getfree(b)));
498 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
499 b->total += count;
500 if (from != NULL) {
501 while (count > 0) {
502 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
503 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
504 from += l;
505 b->rl += l;
506 count -= l;
507 }
508 } else
509 b->rl += count;
510 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
511
512 return 0;
513 }
514
515 int
516 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
517 {
518 int l;
519
520 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
521 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
522 if (to != NULL) {
523 while (count > 0) {
524 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
525 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
526 to += l;
527 b->rl -= l;
528 b->rp = (b->rp + l) % b->bufsize;
529 count -= l;
530 }
531 } else {
532 b->rl -= count;
533 b->rp = (b->rp + count) % b->bufsize;
534 }
535 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
536
537 return 0;
538 }
539
540 /* count is number of bytes we want added to destination buffer */
541 int
542 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
543 {
544 KASSERT(count > 0, ("can't feed 0 bytes"));
545
546 if (sndbuf_getfree(to) < count)
547 return EINVAL;
548
549 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
550 if (count)
551 sndbuf_acquire(to, to->tmpbuf, count);
552 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
553
554 return 0;
555 }
556
557 /************************************************************/
558
559 void
560 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
561 {
562 printf("%s: [", s);
563 if (what & 0x01)
564 printf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
565 if (what & 0x02)
566 printf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
567 if (what & 0x04)
568 printf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
569 if (what & 0x08)
570 printf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
571 if (what & 0x10)
572 printf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
573 printf(" ]\n");
574 }
575
576 /************************************************************/
577 u_int32_t
578 sndbuf_getflags(struct snd_dbuf *b)
579 {
580 return b->flags;
581 }
582
583 void
584 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)
585 {
586 b->flags &= ~flags;
587 if (on)
588 b->flags |= flags;
589 }
590
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