2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #ifdef HAVE_KERNEL_OPTION_HEADERS
32 #include <dev/sound/pcm/sound.h>
34 #include "feeder_if.h"
36 SND_DECLARE_FILE("$FreeBSD: head/sys/dev/sound/pcm/feeder.c 227293 2011-11-07 06:44:47Z ed $");
38 static MALLOC_DEFINE(M_FEEDER, "feeder", "pcm feeder");
40 #define MAXFEEDERS 256
43 struct feedertab_entry {
44 SLIST_ENTRY(feedertab_entry) link;
45 struct feeder_class *feederclass;
46 struct pcm_feederdesc *desc;
50 static SLIST_HEAD(, feedertab_entry) feedertab;
52 /*****************************************************************************/
55 feeder_register(void *p)
57 static int feedercnt = 0;
59 struct feeder_class *fc = p;
60 struct feedertab_entry *fte;
64 KASSERT(fc->desc == NULL, ("first feeder not root: %s", fc->name));
66 SLIST_INIT(&feedertab);
67 fte = kmalloc(sizeof(*fte), M_FEEDER, M_WAITOK | M_ZERO);
69 kprintf("can't allocate memory for root feeder: %s\n",
74 fte->feederclass = fc;
77 SLIST_INSERT_HEAD(&feedertab, fte, link);
80 /* initialize global variables */
82 if (snd_verbose < 0 || snd_verbose > 4)
85 /* initialize unit numbering */
87 if (snd_unit < 0 || snd_unit > PCMMAXUNIT)
90 if (snd_maxautovchans < 0 ||
91 snd_maxautovchans > SND_MAXVCHANS)
92 snd_maxautovchans = 0;
94 if (chn_latency < CHN_LATENCY_MIN ||
95 chn_latency > CHN_LATENCY_MAX)
96 chn_latency = CHN_LATENCY_DEFAULT;
98 if (chn_latency_profile < CHN_LATENCY_PROFILE_MIN ||
99 chn_latency_profile > CHN_LATENCY_PROFILE_MAX)
100 chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT;
102 if (feeder_rate_min < FEEDRATE_MIN ||
103 feeder_rate_max < FEEDRATE_MIN ||
104 feeder_rate_min > FEEDRATE_MAX ||
105 feeder_rate_max > FEEDRATE_MAX ||
106 !(feeder_rate_min < feeder_rate_max)) {
107 feeder_rate_min = FEEDRATE_RATEMIN;
108 feeder_rate_max = FEEDRATE_RATEMAX;
111 if (feeder_rate_round < FEEDRATE_ROUNDHZ_MIN ||
112 feeder_rate_round > FEEDRATE_ROUNDHZ_MAX)
113 feeder_rate_round = FEEDRATE_ROUNDHZ;
116 kprintf("%s: snd_unit=%d snd_maxautovchans=%d "
118 "feeder_rate_min=%d feeder_rate_max=%d "
119 "feeder_rate_round=%d\n",
120 __func__, snd_unit, snd_maxautovchans,
122 feeder_rate_min, feeder_rate_max,
125 /* we've got our root feeder so don't veto pcm loading anymore */
131 KASSERT(fc->desc != NULL, ("feeder '%s' has no descriptor", fc->name));
133 /* beyond this point failure is non-fatal but may result in some translations being unavailable */
135 while ((feedercnt < MAXFEEDERS) && (fc->desc[i].type > 0)) {
136 /* printf("adding feeder %s, %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out); */
137 fte = kmalloc(sizeof(*fte), M_FEEDER, M_WAITOK | M_ZERO);
139 kprintf("can't allocate memory for feeder '%s', %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out);
143 fte->feederclass = fc;
144 fte->desc = &fc->desc[i];
145 fte->idx = feedercnt;
146 fte->desc->idx = feedercnt;
147 SLIST_INSERT_HEAD(&feedertab, fte, link);
151 if (feedercnt >= MAXFEEDERS)
152 kprintf("MAXFEEDERS (%d >= %d) exceeded\n", feedercnt, MAXFEEDERS);
156 feeder_unregisterall(void *p)
158 struct feedertab_entry *fte, *next;
160 next = SLIST_FIRST(&feedertab);
161 while (next != NULL) {
163 next = SLIST_NEXT(fte, link);
164 kfree(fte, M_FEEDER);
169 cmpdesc(struct pcm_feederdesc *n, struct pcm_feederdesc *m)
171 return ((n->type == m->type) &&
172 ((n->in == 0) || (n->in == m->in)) &&
173 ((n->out == 0) || (n->out == m->out)) &&
174 (n->flags == m->flags));
178 feeder_destroy(struct pcm_feeder *f)
181 kobj_delete((kobj_t)f, M_FEEDER);
184 static struct pcm_feeder *
185 feeder_create(struct feeder_class *fc, struct pcm_feederdesc *desc)
187 struct pcm_feeder *f;
190 f = (struct pcm_feeder *)kobj_create((kobj_class_t)fc, M_FEEDER, M_WAITOK | M_ZERO);
198 f->desc = &(f->desc_static);
203 f->desc->type = FEEDER_ROOT;
210 err = FEEDER_INIT(f);
212 kprintf("feeder_init(%p) on %s returned %d\n", f, fc->name, err);
221 struct feeder_class *
222 feeder_getclass(struct pcm_feederdesc *desc)
224 struct feedertab_entry *fte;
226 SLIST_FOREACH(fte, &feedertab, link) {
227 if ((desc == NULL) && (fte->desc == NULL))
228 return fte->feederclass;
229 if ((fte->desc != NULL) && (desc != NULL) && cmpdesc(desc, fte->desc))
230 return fte->feederclass;
236 chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc)
238 struct pcm_feeder *nf;
240 nf = feeder_create(fc, desc);
244 nf->source = c->feeder;
246 if (c->feeder != NULL)
247 c->feeder->parent = nf;
254 chn_removefeeder(struct pcm_channel *c)
256 struct pcm_feeder *f;
258 if (c->feeder == NULL)
261 c->feeder = c->feeder->source;
268 chn_findfeeder(struct pcm_channel *c, u_int32_t type)
270 struct pcm_feeder *f;
274 if (f->desc->type == type)
283 * 14bit format scoring
284 * --------------------
286 * 13 12 11 10 9 8 2 1 0 offset
287 * +---+---+---+---+---+---+-------------+---+---+
288 * | X | X | X | X | X | X | X X X X X X | X | X |
289 * +---+---+---+---+---+---+-------------+---+---+
291 * | | | | | | | | +--> signed?
293 * | | | | | | | +------> bigendian?
295 * | | | | | | +---------------> total channels
297 * | | | | | +------------------------> AFMT_A_LAW
299 * | | | | +----------------------------> AFMT_MU_LAW
301 * | | | +--------------------------------> AFMT_8BIT
303 * | | +------------------------------------> AFMT_16BIT
305 * | +----------------------------------------> AFMT_24BIT
307 * +--------------------------------------------> AFMT_32BIT
309 #define score_signeq(s1, s2) (((s1) & 0x1) == ((s2) & 0x1))
310 #define score_endianeq(s1, s2) (((s1) & 0x2) == ((s2) & 0x2))
311 #define score_cheq(s1, s2) (((s1) & 0xfc) == ((s2) & 0xfc))
312 #define score_chgt(s1, s2) (((s1) & 0xfc) > ((s2) & 0xfc))
313 #define score_chlt(s1, s2) (((s1) & 0xfc) < ((s2) & 0xfc))
314 #define score_val(s1) ((s1) & 0x3f00)
315 #define score_cse(s1) ((s1) & 0x7f)
318 snd_fmtscore(u_int32_t fmt)
323 if (fmt & AFMT_SIGNED)
325 if (fmt & AFMT_BIGENDIAN)
327 /*if (fmt & AFMT_STEREO)
328 ret |= (2 & 0x3f) << 2;
330 ret |= (1 & 0x3f) << 2;*/
331 ret |= (AFMT_CHANNEL(fmt) & 0x3f) << 2;
332 if (fmt & AFMT_A_LAW)
334 else if (fmt & AFMT_MU_LAW)
336 else if (fmt & AFMT_8BIT)
338 else if (fmt & AFMT_16BIT)
340 else if (fmt & AFMT_24BIT)
342 else if (fmt & AFMT_32BIT)
349 snd_fmtbestfunc(u_int32_t fmt, u_int32_t *fmts, int cheq)
351 u_int32_t best, score, score2, oldscore;
354 if (fmt == 0 || fmts == NULL || fmts[0] == 0)
357 if (snd_fmtvalid(fmt, fmts))
361 score = snd_fmtscore(fmt);
363 for (i = 0; fmts[i] != 0; i++) {
364 score2 = snd_fmtscore(fmts[i]);
365 if (cheq && !score_cheq(score, score2) &&
366 (score_chlt(score2, score) ||
367 (oldscore != 0 && score_chgt(score2, oldscore))))
370 (score_val(score2) == score_val(score)) ||
371 (score_val(score2) == score_val(oldscore)) ||
372 (score_val(score2) > score_val(oldscore) &&
373 score_val(score2) < score_val(score)) ||
374 (score_val(score2) < score_val(oldscore) &&
375 score_val(score2) > score_val(score)) ||
376 (score_val(oldscore) < score_val(score) &&
377 score_val(score2) > score_val(oldscore))) {
378 if (score_val(oldscore) != score_val(score2) ||
379 score_cse(score) == score_cse(score2) ||
380 ((score_cse(oldscore) != score_cse(score) &&
381 !score_endianeq(score, oldscore) &&
382 (score_endianeq(score, score2) ||
383 (!score_signeq(score, oldscore) &&
384 score_signeq(score, score2)))))) {
394 snd_fmtbestbit(u_int32_t fmt, u_int32_t *fmts)
396 return snd_fmtbestfunc(fmt, fmts, 0);
400 snd_fmtbestchannel(u_int32_t fmt, u_int32_t *fmts)
402 return snd_fmtbestfunc(fmt, fmts, 1);
406 snd_fmtbest(u_int32_t fmt, u_int32_t *fmts)
408 u_int32_t best1, best2;
409 u_int32_t score, score1, score2;
411 if (snd_fmtvalid(fmt, fmts))
414 best1 = snd_fmtbestchannel(fmt, fmts);
415 best2 = snd_fmtbestbit(fmt, fmts);
417 if (best1 != 0 && best2 != 0 && best1 != best2) {
418 /*if (fmt & AFMT_STEREO)*/
419 if (AFMT_CHANNEL(fmt) > 1)
422 score = score_val(snd_fmtscore(fmt));
423 score1 = score_val(snd_fmtscore(best1));
424 score2 = score_val(snd_fmtscore(best2));
425 if (score1 == score2 || score1 == score)
427 else if (score2 == score)
429 else if (score1 > score2)
433 } else if (best2 == 0)
440 feeder_printchain(struct pcm_feeder *head)
442 struct pcm_feeder *f;
444 kprintf("feeder chain (head @%p)\n", head);
447 kprintf("%s/%d @ %p\n", f->class->name, f->desc->idx, f);
450 kprintf("[end]\n\n");
453 /*****************************************************************************/
456 feed_root(struct pcm_feeder *feeder, struct pcm_channel *ch, u_int8_t *buffer, u_int32_t count, void *source)
458 struct snd_dbuf *src = source;
461 KASSERT(count > 0, ("feed_root: count == 0"));
463 if (++ch->feedcount == 0)
466 l = min(count, sndbuf_getready(src));
468 /* When recording only return as much data as available */
469 if (ch->direction == PCMDIR_REC) {
470 sndbuf_dispose(src, buffer, l);
479 kprintf("%s: (%s) %spending %d bytes "
480 "(count=%d l=%d feed=%d)\n",
482 (ch->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware",
483 (ch->feedcount == 1) ? "pre" : "ap",
484 offset, count, l, ch->feedcount);
486 if (ch->feedcount == 1) {
488 sndbuf_zerodata(sndbuf_getfmt(src)),
491 sndbuf_dispose(src, buffer + offset, l);
496 sndbuf_dispose(src, buffer, l);
498 sndbuf_zerodata(sndbuf_getfmt(src)),
500 if (!(ch->flags & CHN_F_CLOSING))
504 sndbuf_dispose(src, buffer, l);
509 static kobj_method_t feeder_root_methods[] = {
510 KOBJMETHOD(feeder_feed, feed_root),
513 static struct feeder_class feeder_root_class = {
514 .name = "feeder_root",
515 .methods = feeder_root_methods,
516 .size = sizeof(struct pcm_feeder),
520 SYSINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_register, &feeder_root_class);
521 SYSUNINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_unregisterall, NULL);