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[PATCH] dvb: core: dvb_demux: remove unused cruft
[linux-2.6.git] / drivers / media / dvb / dvb-core / dvb_demux.c
blob8774a94ef01bd5299b1fc48fd5e148f8d271f2a9
1 /*
2 * dvb_demux.c - DVB kernel demux API
3 *
4 * Copyright (C) 2000-2001 Ralph Metzler <ralph@convergence.de>
5 * & Marcus Metzler <marcus@convergence.de>
6 * for convergence integrated media GmbH
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23
24 #include <linux/spinlock.h>
25 #include <linux/slab.h>
26 #include <linux/vmalloc.h>
27 #include <linux/module.h>
28 #include <linux/poll.h>
29 #include <linux/string.h>
30 #include <linux/crc32.h>
31 #include <asm/uaccess.h>
32
33 #include "dvb_demux.h"
34
35 #define NOBUFS
36 /*
37 ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog
38 */
39 // #define DVB_DEMUX_SECTION_LOSS_LOG
40
41
42 /******************************************************************************
43 * static inlined helper functions
44 ******************************************************************************/
45
46
47 static inline u16 section_length(const u8 *buf)
48 {
49 return 3+((buf[1]&0x0f)<<8)+buf[2];
50 }
51
52
53 static inline u16 ts_pid(const u8 *buf)
54 {
55 return ((buf[1]&0x1f)<<8)+buf[2];
56 }
57
58
59 static inline u8 payload(const u8 *tsp)
60 {
61 if (!(tsp[3] & 0x10)) // no payload?
62 return 0;
63 if (tsp[3] & 0x20) { // adaptation field?
64 if (tsp[4] > 183) // corrupted data?
65 return 0;
66 else
67 return 184-1-tsp[4];
68 }
69 return 184;
70 }
71
72
73 static u32 dvb_dmx_crc32 (struct dvb_demux_feed *f, const u8 *src, size_t len)
74 {
75 return (f->feed.sec.crc_val = crc32_be (f->feed.sec.crc_val, src, len));
76 }
77
78
79 static void dvb_dmx_memcopy (struct dvb_demux_feed *f, u8 *d, const u8 *s, size_t len)
80 {
81 memcpy (d, s, len);
82 }
83
84
85 /******************************************************************************
86 * Software filter functions
87 ******************************************************************************/
88
89 static inline int dvb_dmx_swfilter_payload (struct dvb_demux_feed *feed, const u8 *buf)
90 {
91 int count = payload(buf);
92 int p;
93 //int ccok;
94 //u8 cc;
95
96 if (count == 0)
97 return -1;
98
99 p = 188-count;
100
101 /*
102 cc=buf[3]&0x0f;
103 ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0;
104 dvbdmxfeed->cc=cc;
105 if (!ccok)
106 printk("missed packet!\n");
107 */
108
109 if (buf[1] & 0x40) // PUSI ?
110 feed->peslen = 0xfffa;
111
112 feed->peslen += count;
113
114 return feed->cb.ts (&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK);
115 }
116
117
118 static int dvb_dmx_swfilter_sectionfilter (struct dvb_demux_feed *feed,
119 struct dvb_demux_filter *f)
120 {
121 u8 neq = 0;
122 int i;
123
124 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
125 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
126
127 if (f->maskandmode[i] & xor)
128 return 0;
129
130 neq |= f->maskandnotmode[i] & xor;
131 }
132
133 if (f->doneq && !neq)
134 return 0;
135
136 return feed->cb.sec (feed->feed.sec.secbuf, feed->feed.sec.seclen,
137 NULL, 0, &f->filter, DMX_OK);
138 }
139
140
141 static inline int dvb_dmx_swfilter_section_feed (struct dvb_demux_feed *feed)
142 {
143 struct dvb_demux *demux = feed->demux;
144 struct dvb_demux_filter *f = feed->filter;
145 struct dmx_section_feed *sec = &feed->feed.sec;
146 int section_syntax_indicator;
147
148 if (!sec->is_filtering)
149 return 0;
150
151 if (!f)
152 return 0;
153
154 if (sec->check_crc) {
155 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
156 if (section_syntax_indicator &&
157 demux->check_crc32(feed, sec->secbuf, sec->seclen))
158 return -1;
159 }
160
161 do {
162 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
163 return -1;
164 } while ((f = f->next) && sec->is_filtering);
165
166 sec->seclen = 0;
167
168 return 0;
169 }
170
171
172 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
173 {
174 struct dmx_section_feed *sec = &feed->feed.sec;
175
176 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
177 if(sec->secbufp < sec->tsfeedp)
178 {
179 int i, n = sec->tsfeedp - sec->secbufp;
180
181 /* section padding is done with 0xff bytes entirely.
182 ** due to speed reasons, we won't check all of them
183 ** but just first and last
184 */
185 if(sec->secbuf[0] != 0xff || sec->secbuf[n-1] != 0xff)
186 {
187 printk("dvb_demux.c section ts padding loss: %d/%d\n",
188 n, sec->tsfeedp);
189 printk("dvb_demux.c pad data:");
190 for(i = 0; i < n; i++)
191 printk(" %02x", sec->secbuf[i]);
192 printk("\n");
193 }
194 }
195 #endif
196
197 sec->tsfeedp = sec->secbufp = sec->seclen = 0;
198 sec->secbuf = sec->secbuf_base;
199 }
200
201 /*
202 ** Losless Section Demux 1.4.1 by Emard
203 ** Valsecchi Patrick:
204 ** - middle of section A (no PUSI)
205 ** - end of section A and start of section B
206 ** (with PUSI pointing to the start of the second section)
207 **
208 ** In this case, without feed->pusi_seen you'll receive a garbage section
209 ** consisting of the end of section A. Basically because tsfeedp
210 ** is incemented and the use=0 condition is not raised
211 ** when the second packet arrives.
212 **
213 ** Fix:
214 ** when demux is started, let feed->pusi_seen = 0 to
215 ** prevent initial feeding of garbage from the end of
216 ** previous section. When you for the first time see PUSI=1
217 ** then set feed->pusi_seen = 1
218 */
219 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, const u8 *buf, u8 len)
220 {
221 struct dvb_demux *demux = feed->demux;
222 struct dmx_section_feed *sec = &feed->feed.sec;
223 u16 limit, seclen, n;
224
225 if(sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
226 return 0;
227
228 if(sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE)
229 {
230 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
231 printk("dvb_demux.c section buffer full loss: %d/%d\n",
232 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, DMX_MAX_SECFEED_SIZE);
233 #endif
234 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
235 }
236
237 if(len <= 0)
238 return 0;
239
240 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
241 sec->tsfeedp += len;
242
243 /* -----------------------------------------------------
244 ** Dump all the sections we can find in the data (Emard)
245 */
246
247 limit = sec->tsfeedp;
248 if(limit > DMX_MAX_SECFEED_SIZE)
249 return -1; /* internal error should never happen */
250
251 /* to be sure always set secbuf */
252 sec->secbuf = sec->secbuf_base + sec->secbufp;
253
254 for(n = 0; sec->secbufp + 2 < limit; n++)
255 {
256 seclen = section_length(sec->secbuf);
257 if(seclen <= 0 || seclen > DMX_MAX_SECFEED_SIZE
258 || seclen + sec->secbufp > limit)
259 return 0;
260 sec->seclen = seclen;
261 sec->crc_val = ~0;
262 /* dump [secbuf .. secbuf+seclen) */
263 if(feed->pusi_seen)
264 dvb_dmx_swfilter_section_feed(feed);
265 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
266 else
267 printk("dvb_demux.c pusi not seen, discarding section data\n");
268 #endif
269 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
270 sec->secbuf += seclen; /* redundand but saves pointer arithmetic */
271 }
272
273 return 0;
274 }
275
276
277 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, const u8 *buf)
278 {
279 u8 p, count;
280 int ccok, dc_i = 0;
281 u8 cc;
282
283 count = payload(buf);
284
285 if (count == 0) /* count == 0 if no payload or out of range */
286 return -1;
287
288 p = 188 - count; /* payload start */
289
290 cc = buf[3] & 0x0f;
291 ccok = ((feed->cc + 1) & 0x0f) == cc;
292 feed->cc = cc;
293
294 if (buf[3] & 0x20) {
295 /* adaption field present, check for discontinuity_indicator */
296 if ((buf[4] > 0) && (buf[5] & 0x80))
297 dc_i = 1;
298 }
299
300 if (!ccok || dc_i) {
301 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
302 printk("dvb_demux.c discontinuity detected %d bytes lost\n", count);
303 /* those bytes under sume circumstances will again be reported
304 ** in the following dvb_dmx_swfilter_section_new
305 */
306 #endif
307 /* Discontinuity detected. Reset pusi_seen = 0 to
308 ** stop feeding of suspicious data until next PUSI=1 arrives
309 */
310 feed->pusi_seen = 0;
311 dvb_dmx_swfilter_section_new(feed);
312 }
313
314 if (buf[1] & 0x40) {
315 // PUSI=1 (is set), section boundary is here
316 if (count > 1 && buf[p] < count) {
317 const u8 *before = buf+p+1;
318 u8 before_len = buf[p];
319 const u8 *after = before+before_len;
320 u8 after_len = count-1-before_len;
321
322 dvb_dmx_swfilter_section_copy_dump(feed, before, before_len);
323 /* before start of new section, set pusi_seen = 1 */
324 feed->pusi_seen = 1;
325 dvb_dmx_swfilter_section_new(feed);
326 dvb_dmx_swfilter_section_copy_dump(feed, after, after_len);
327 }
328 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
329 else
330 if (count > 0)
331 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
332 #endif
333 } else {
334 // PUSI=0 (is not set), no section boundary
335 const u8 *entire = buf+p;
336 u8 entire_len = count;
337
338 dvb_dmx_swfilter_section_copy_dump(feed, entire, entire_len);
339 }
340 return 0;
341 }
342
343
344 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, const u8 *buf)
345 {
346 switch(feed->type) {
347 case DMX_TYPE_TS:
348 if (!feed->feed.ts.is_filtering)
349 break;
350 if (feed->ts_type & TS_PACKET) {
351 if (feed->ts_type & TS_PAYLOAD_ONLY)
352 dvb_dmx_swfilter_payload(feed, buf);
353 else
354 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
355 }
356 if (feed->ts_type & TS_DECODER)
357 if (feed->demux->write_to_decoder)
358 feed->demux->write_to_decoder(feed, buf, 188);
359 break;
360
361 case DMX_TYPE_SEC:
362 if (!feed->feed.sec.is_filtering)
363 break;
364 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
365 feed->feed.sec.seclen = feed->feed.sec.secbufp=0;
366 break;
367
368 default:
369 break;
370 }
371 }
372
373 #define DVR_FEED(f) \
374 (((f)->type == DMX_TYPE_TS) && \
375 ((f)->feed.ts.is_filtering) && \
376 (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET))
377
378 static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
379 {
380 struct dvb_demux_feed *feed;
381 struct list_head *pos, *head=&demux->feed_list;
382 u16 pid = ts_pid(buf);
383 int dvr_done = 0;
384
385 list_for_each(pos, head) {
386 feed = list_entry(pos, struct dvb_demux_feed, list_head);
387
388 if ((feed->pid != pid) && (feed->pid != 0x2000))
389 continue;
390
391 /* copy each packet only once to the dvr device, even
392 * if a PID is in multiple filters (e.g. video + PCR) */
393 if ((DVR_FEED(feed)) && (dvr_done++))
394 continue;
395
396 if (feed->pid == pid) {
397 dvb_dmx_swfilter_packet_type(feed, buf);
398 if (DVR_FEED(feed))
399 continue;
400 }
401
402 if (feed->pid == 0x2000)
403 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
404 }
405 }
406
407 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, size_t count)
408 {
409 spin_lock(&demux->lock);
410
411 while (count--) {
412 if(buf[0] == 0x47) {
413 dvb_dmx_swfilter_packet(demux, buf);
414 }
415 buf += 188;
416 }
417
418 spin_unlock(&demux->lock);
419 }
420 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
421
422
423 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
424 {
425 int p = 0, i, j;
426
427 spin_lock(&demux->lock);
428
429 if ((i = demux->tsbufp)) {
430 if (count < (j=188-i)) {
431 memcpy(&demux->tsbuf[i], buf, count);
432 demux->tsbufp += count;
433 goto bailout;
434 }
435 memcpy(&demux->tsbuf[i], buf, j);
436 if (demux->tsbuf[0] == 0x47)
437 dvb_dmx_swfilter_packet(demux, demux->tsbuf);
438 demux->tsbufp = 0;
439 p += j;
440 }
441
442 while (p < count) {
443 if (buf[p] == 0x47) {
444 if (count-p >= 188) {
445 dvb_dmx_swfilter_packet(demux, buf+p);
446 p += 188;
447 } else {
448 i = count-p;
449 memcpy(demux->tsbuf, buf+p, i);
450 demux->tsbufp=i;
451 goto bailout;
452 }
453 } else
454 p++;
455 }
456
457 bailout:
458 spin_unlock(&demux->lock);
459 }
460 EXPORT_SYMBOL(dvb_dmx_swfilter);
461
462 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
463 {
464 int p = 0,i, j;
465 u8 tmppack[188];
466 spin_lock(&demux->lock);
467
468 if ((i = demux->tsbufp)) {
469 if (count < (j=204-i)) {
470 memcpy(&demux->tsbuf[i], buf, count);
471 demux->tsbufp += count;
472 goto bailout;
473 }
474 memcpy(&demux->tsbuf[i], buf, j);
475 if ((demux->tsbuf[0] == 0x47)|(demux->tsbuf[0]==0xB8)) {
476 memcpy(tmppack, demux->tsbuf, 188);
477 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
478 dvb_dmx_swfilter_packet(demux, tmppack);
479 }
480 demux->tsbufp = 0;
481 p += j;
482 }
483
484 while (p < count) {
485 if ((buf[p] == 0x47)|(buf[p] == 0xB8)) {
486 if (count-p >= 204) {
487 memcpy(tmppack, buf+p, 188);
488 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
489 dvb_dmx_swfilter_packet(demux, tmppack);
490 p += 204;
491 } else {
492 i = count-p;
493 memcpy(demux->tsbuf, buf+p, i);
494 demux->tsbufp=i;
495 goto bailout;
496 }
497 } else {
498 p++;
499 }
500 }
501
502 bailout:
503 spin_unlock(&demux->lock);
504 }
505 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
506
507
508 static struct dvb_demux_filter * dvb_dmx_filter_alloc(struct dvb_demux *demux)
509 {
510 int i;
511
512 for (i=0; i<demux->filternum; i++)
513 if (demux->filter[i].state == DMX_STATE_FREE)
514 break;
515
516 if (i == demux->filternum)
517 return NULL;
518
519 demux->filter[i].state = DMX_STATE_ALLOCATED;
520
521 return &demux->filter[i];
522 }
523
524 static struct dvb_demux_feed * dvb_dmx_feed_alloc(struct dvb_demux *demux)
525 {
526 int i;
527
528 for (i=0; i<demux->feednum; i++)
529 if (demux->feed[i].state == DMX_STATE_FREE)
530 break;
531
532 if (i == demux->feednum)
533 return NULL;
534
535 demux->feed[i].state = DMX_STATE_ALLOCATED;
536
537 return &demux->feed[i];
538 }
539
540 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
541 {
542 struct dvb_demux_feed *entry;
543
544 list_for_each_entry(entry, &feed->demux->feed_list, list_head)
545 if (entry == feed)
546 return 1;
547
548 return 0;
549 }
550
551 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
552 {
553 spin_lock_irq(&feed->demux->lock);
554 if (dvb_demux_feed_find(feed)) {
555 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
556 __FUNCTION__, feed->type, feed->state, feed->pid);
557 goto out;
558 }
559
560 list_add(&feed->list_head, &feed->demux->feed_list);
561 out:
562 spin_unlock_irq(&feed->demux->lock);
563 }
564
565 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
566 {
567 spin_lock_irq(&feed->demux->lock);
568 if (!(dvb_demux_feed_find(feed))) {
569 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
570 __FUNCTION__, feed->type, feed->state, feed->pid);
571 goto out;
572 }
573
574 list_del(&feed->list_head);
575 out:
576 spin_unlock_irq(&feed->demux->lock);
577 }
578
579 static int dmx_ts_feed_set (struct dmx_ts_feed* ts_feed, u16 pid, int ts_type,
580 enum dmx_ts_pes pes_type, size_t callback_length,
581 size_t circular_buffer_size, int descramble,
582 struct timespec timeout)
583 {
584 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
585 struct dvb_demux *demux = feed->demux;
586
587 if (pid > DMX_MAX_PID)
588 return -EINVAL;
589
590 if (down_interruptible (&demux->mutex))
591 return -ERESTARTSYS;
592
593 if (ts_type & TS_DECODER) {
594 if (pes_type >= DMX_TS_PES_OTHER) {
595 up(&demux->mutex);
596 return -EINVAL;
597 }
598
599 if (demux->pesfilter[pes_type] &&
600 demux->pesfilter[pes_type] != feed) {
601 up(&demux->mutex);
602 return -EINVAL;
603 }
604
605 demux->pesfilter[pes_type] = feed;
606 demux->pids[pes_type] = pid;
607 }
608
609 dvb_demux_feed_add(feed);
610
611 feed->pid = pid;
612 feed->buffer_size = circular_buffer_size;
613 feed->descramble = descramble;
614 feed->timeout = timeout;
615 feed->cb_length = callback_length;
616 feed->ts_type = ts_type;
617 feed->pes_type = pes_type;
618
619 if (feed->descramble) {
620 up(&demux->mutex);
621 return -ENOSYS;
622 }
623
624 if (feed->buffer_size) {
625 #ifdef NOBUFS
626 feed->buffer=NULL;
627 #else
628 feed->buffer = vmalloc(feed->buffer_size);
629 if (!feed->buffer) {
630 up(&demux->mutex);
631 return -ENOMEM;
632 }
633 #endif
634 }
635
636 feed->state = DMX_STATE_READY;
637 up(&demux->mutex);
638
639 return 0;
640 }
641
642
643 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed* ts_feed)
644 {
645 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
646 struct dvb_demux *demux = feed->demux;
647 int ret;
648
649 if (down_interruptible (&demux->mutex))
650 return -ERESTARTSYS;
651
652 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
653 up(&demux->mutex);
654 return -EINVAL;
655 }
656
657 if (!demux->start_feed) {
658 up(&demux->mutex);
659 return -ENODEV;
660 }
661
662 if ((ret = demux->start_feed(feed)) < 0) {
663 up(&demux->mutex);
664 return ret;
665 }
666
667 spin_lock_irq(&demux->lock);
668 ts_feed->is_filtering = 1;
669 feed->state = DMX_STATE_GO;
670 spin_unlock_irq(&demux->lock);
671 up(&demux->mutex);
672
673 return 0;
674 }
675
676 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed* ts_feed)
677 {
678 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
679 struct dvb_demux *demux = feed->demux;
680 int ret;
681
682 if (down_interruptible (&demux->mutex))
683 return -ERESTARTSYS;
684
685 if (feed->state < DMX_STATE_GO) {
686 up(&demux->mutex);
687 return -EINVAL;
688 }
689
690 if (!demux->stop_feed) {
691 up(&demux->mutex);
692 return -ENODEV;
693 }
694
695 ret = demux->stop_feed(feed);
696
697 spin_lock_irq(&demux->lock);
698 ts_feed->is_filtering = 0;
699 feed->state = DMX_STATE_ALLOCATED;
700 spin_unlock_irq(&demux->lock);
701 up(&demux->mutex);
702
703 return ret;
704 }
705
706 static int dvbdmx_allocate_ts_feed (struct dmx_demux *dmx, struct dmx_ts_feed **ts_feed,
707 dmx_ts_cb callback)
708 {
709 struct dvb_demux *demux = (struct dvb_demux *) dmx;
710 struct dvb_demux_feed *feed;
711
712 if (down_interruptible (&demux->mutex))
713 return -ERESTARTSYS;
714
715 if (!(feed = dvb_dmx_feed_alloc(demux))) {
716 up(&demux->mutex);
717 return -EBUSY;
718 }
719
720 feed->type = DMX_TYPE_TS;
721 feed->cb.ts = callback;
722 feed->demux = demux;
723 feed->pid = 0xffff;
724 feed->peslen = 0xfffa;
725 feed->buffer = NULL;
726
727 (*ts_feed) = &feed->feed.ts;
728 (*ts_feed)->parent = dmx;
729 (*ts_feed)->priv = NULL;
730 (*ts_feed)->is_filtering = 0;
731 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
732 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
733 (*ts_feed)->set = dmx_ts_feed_set;
734
735
736 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
737 feed->state = DMX_STATE_FREE;
738 up(&demux->mutex);
739 return -EBUSY;
740 }
741
742 feed->filter->type = DMX_TYPE_TS;
743 feed->filter->feed = feed;
744 feed->filter->state = DMX_STATE_READY;
745
746 up(&demux->mutex);
747
748 return 0;
749 }
750
751 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, struct dmx_ts_feed *ts_feed)
752 {
753 struct dvb_demux *demux = (struct dvb_demux *) dmx;
754 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
755
756 if (down_interruptible (&demux->mutex))
757 return -ERESTARTSYS;
758
759 if (feed->state == DMX_STATE_FREE) {
760 up(&demux->mutex);
761 return -EINVAL;
762 }
763
764 #ifndef NOBUFS
765 vfree(feed->buffer);
766 feed->buffer=0;
767 #endif
768
769 feed->state = DMX_STATE_FREE;
770 feed->filter->state = DMX_STATE_FREE;
771
772 dvb_demux_feed_del(feed);
773
774 feed->pid = 0xffff;
775
776 if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER)
777 demux->pesfilter[feed->pes_type] = NULL;
778
779 up(&demux->mutex);
780 return 0;
781 }
782
783
784 /******************************************************************************
785 * dmx_section_feed API calls
786 ******************************************************************************/
787
788 static int dmx_section_feed_allocate_filter(struct dmx_section_feed* feed,
789 struct dmx_section_filter** filter)
790 {
791 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
792 struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
793 struct dvb_demux_filter *dvbdmxfilter;
794
795 if (down_interruptible (&dvbdemux->mutex))
796 return -ERESTARTSYS;
797
798 dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
799 if (!dvbdmxfilter) {
800 up(&dvbdemux->mutex);
801 return -EBUSY;
802 }
803
804 spin_lock_irq(&dvbdemux->lock);
805 *filter = &dvbdmxfilter->filter;
806 (*filter)->parent = feed;
807 (*filter)->priv = NULL;
808 dvbdmxfilter->feed = dvbdmxfeed;
809 dvbdmxfilter->type = DMX_TYPE_SEC;
810 dvbdmxfilter->state = DMX_STATE_READY;
811 dvbdmxfilter->next = dvbdmxfeed->filter;
812 dvbdmxfeed->filter = dvbdmxfilter;
813 spin_unlock_irq(&dvbdemux->lock);
814
815 up(&dvbdemux->mutex);
816 return 0;
817 }
818
819
820 static int dmx_section_feed_set(struct dmx_section_feed* feed,
821 u16 pid, size_t circular_buffer_size,
822 int descramble, int check_crc)
823 {
824 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
825 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
826
827 if (pid > 0x1fff)
828 return -EINVAL;
829
830 if (down_interruptible (&dvbdmx->mutex))
831 return -ERESTARTSYS;
832
833 dvb_demux_feed_add(dvbdmxfeed);
834
835 dvbdmxfeed->pid = pid;
836 dvbdmxfeed->buffer_size = circular_buffer_size;
837 dvbdmxfeed->descramble = descramble;
838 if (dvbdmxfeed->descramble) {
839 up(&dvbdmx->mutex);
840 return -ENOSYS;
841 }
842
843 dvbdmxfeed->feed.sec.check_crc = check_crc;
844
845 #ifdef NOBUFS
846 dvbdmxfeed->buffer = NULL;
847 #else
848 dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size);
849 if (!dvbdmxfeed->buffer) {
850 up(&dvbdmx->mutex);
851 return -ENOMEM;
852 }
853 #endif
854
855 dvbdmxfeed->state = DMX_STATE_READY;
856 up(&dvbdmx->mutex);
857 return 0;
858 }
859
860
861 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
862 {
863 int i;
864 struct dvb_demux_filter *f;
865 struct dmx_section_filter *sf;
866 u8 mask, mode, doneq;
867
868 if (!(f=dvbdmxfeed->filter))
869 return;
870 do {
871 sf = &f->filter;
872 doneq = 0;
873 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
874 mode = sf->filter_mode[i];
875 mask = sf->filter_mask[i];
876 f->maskandmode[i] = mask & mode;
877 doneq |= f->maskandnotmode[i] = mask & ~mode;
878 }
879 f->doneq = doneq ? 1 : 0;
880 } while ((f = f->next));
881 }
882
883
884 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
885 {
886 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
887 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
888 int ret;
889
890 if (down_interruptible (&dvbdmx->mutex))
891 return -ERESTARTSYS;
892
893 if (feed->is_filtering) {
894 up(&dvbdmx->mutex);
895 return -EBUSY;
896 }
897
898 if (!dvbdmxfeed->filter) {
899 up(&dvbdmx->mutex);
900 return -EINVAL;
901 }
902
903 dvbdmxfeed->feed.sec.tsfeedp = 0;
904 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
905 dvbdmxfeed->feed.sec.secbufp = 0;
906 dvbdmxfeed->feed.sec.seclen = 0;
907
908 if (!dvbdmx->start_feed) {
909 up(&dvbdmx->mutex);
910 return -ENODEV;
911 }
912
913 prepare_secfilters(dvbdmxfeed);
914
915 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
916 up(&dvbdmx->mutex);
917 return ret;
918 }
919
920 spin_lock_irq(&dvbdmx->lock);
921 feed->is_filtering = 1;
922 dvbdmxfeed->state = DMX_STATE_GO;
923 spin_unlock_irq(&dvbdmx->lock);
924
925 up(&dvbdmx->mutex);
926 return 0;
927 }
928
929
930 static int dmx_section_feed_stop_filtering(struct dmx_section_feed* feed)
931 {
932 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
933 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
934 int ret;
935
936 if (down_interruptible (&dvbdmx->mutex))
937 return -ERESTARTSYS;
938
939 if (!dvbdmx->stop_feed) {
940 up(&dvbdmx->mutex);
941 return -ENODEV;
942 }
943
944 ret = dvbdmx->stop_feed(dvbdmxfeed);
945
946 spin_lock_irq(&dvbdmx->lock);
947 dvbdmxfeed->state = DMX_STATE_READY;
948 feed->is_filtering = 0;
949 spin_unlock_irq(&dvbdmx->lock);
950
951 up(&dvbdmx->mutex);
952 return ret;
953 }
954
955
956 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
957 struct dmx_section_filter* filter)
958 {
959 struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *) filter, *f;
960 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
961 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
962
963 if (down_interruptible (&dvbdmx->mutex))
964 return -ERESTARTSYS;
965
966 if (dvbdmxfilter->feed != dvbdmxfeed) {
967 up(&dvbdmx->mutex);
968 return -EINVAL;
969 }
970
971 if (feed->is_filtering)
972 feed->stop_filtering(feed);
973
974 spin_lock_irq(&dvbdmx->lock);
975 f = dvbdmxfeed->filter;
976
977 if (f == dvbdmxfilter) {
978 dvbdmxfeed->filter = dvbdmxfilter->next;
979 } else {
980 while(f->next != dvbdmxfilter)
981 f = f->next;
982 f->next = f->next->next;
983 }
984
985 dvbdmxfilter->state = DMX_STATE_FREE;
986 spin_unlock_irq(&dvbdmx->lock);
987 up(&dvbdmx->mutex);
988 return 0;
989 }
990
991 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
992 struct dmx_section_feed **feed,
993 dmx_section_cb callback)
994 {
995 struct dvb_demux *dvbdmx = (struct dvb_demux *) demux;
996 struct dvb_demux_feed *dvbdmxfeed;
997
998 if (down_interruptible (&dvbdmx->mutex))
999 return -ERESTARTSYS;
1000
1001 if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
1002 up(&dvbdmx->mutex);
1003 return -EBUSY;
1004 }
1005
1006 dvbdmxfeed->type = DMX_TYPE_SEC;
1007 dvbdmxfeed->cb.sec = callback;
1008 dvbdmxfeed->demux = dvbdmx;
1009 dvbdmxfeed->pid = 0xffff;
1010 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1011 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1012 dvbdmxfeed->feed.sec.tsfeedp = 0;
1013 dvbdmxfeed->filter = NULL;
1014 dvbdmxfeed->buffer = NULL;
1015
1016 (*feed)=&dvbdmxfeed->feed.sec;
1017 (*feed)->is_filtering = 0;
1018 (*feed)->parent = demux;
1019 (*feed)->priv = NULL;
1020
1021 (*feed)->set = dmx_section_feed_set;
1022 (*feed)->allocate_filter = dmx_section_feed_allocate_filter;
1023 (*feed)->start_filtering = dmx_section_feed_start_filtering;
1024 (*feed)->stop_filtering = dmx_section_feed_stop_filtering;
1025 (*feed)->release_filter = dmx_section_feed_release_filter;
1026
1027 up(&dvbdmx->mutex);
1028 return 0;
1029 }
1030
1031 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1032 struct dmx_section_feed *feed)
1033 {
1034 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed;
1035 struct dvb_demux *dvbdmx = (struct dvb_demux *) demux;
1036
1037 if (down_interruptible (&dvbdmx->mutex))
1038 return -ERESTARTSYS;
1039
1040 if (dvbdmxfeed->state==DMX_STATE_FREE) {
1041 up(&dvbdmx->mutex);
1042 return -EINVAL;
1043 }
1044 #ifndef NOBUFS
1045 vfree(dvbdmxfeed->buffer);
1046 dvbdmxfeed->buffer=0;
1047 #endif
1048 dvbdmxfeed->state=DMX_STATE_FREE;
1049
1050 dvb_demux_feed_del(dvbdmxfeed);
1051
1052 dvbdmxfeed->pid = 0xffff;
1053
1054 up(&dvbdmx->mutex);
1055 return 0;
1056 }
1057
1058
1059 /******************************************************************************
1060 * dvb_demux kernel data API calls
1061 ******************************************************************************/
1062
1063 static int dvbdmx_open(struct dmx_demux *demux)
1064 {
1065 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1066
1067 if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
1068 return -EUSERS;
1069
1070 dvbdemux->users++;
1071 return 0;
1072 }
1073
1074
1075 static int dvbdmx_close(struct dmx_demux *demux)
1076 {
1077 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1078
1079 if (dvbdemux->users == 0)
1080 return -ENODEV;
1081
1082 dvbdemux->users--;
1083 //FIXME: release any unneeded resources if users==0
1084 return 0;
1085 }
1086
1087
1088 static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count)
1089 {
1090 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1091
1092 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1093 return -EINVAL;
1094
1095 if (down_interruptible (&dvbdemux->mutex))
1096 return -ERESTARTSYS;
1097 dvb_dmx_swfilter(dvbdemux, buf, count);
1098 up(&dvbdemux->mutex);
1099
1100 if (signal_pending(current))
1101 return -EINTR;
1102 return count;
1103 }
1104
1105
1106 static int dvbdmx_add_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1107 {
1108 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1109 struct list_head *head = &dvbdemux->frontend_list;
1110
1111 list_add(&(frontend->connectivity_list), head);
1112
1113 return 0;
1114 }
1115
1116
1117 static int dvbdmx_remove_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1118 {
1119 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1120 struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
1121
1122 list_for_each_safe (pos, n, head) {
1123 if (DMX_FE_ENTRY(pos) == frontend) {
1124 list_del(pos);
1125 return 0;
1126 }
1127 }
1128
1129 return -ENODEV;
1130 }
1131
1132
1133 static struct list_head * dvbdmx_get_frontends(struct dmx_demux *demux)
1134 {
1135 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1136
1137 if (list_empty(&dvbdemux->frontend_list))
1138 return NULL;
1139 return &dvbdemux->frontend_list;
1140 }
1141
1142
1143 static int dvbdmx_connect_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1144 {
1145 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1146
1147 if (demux->frontend)
1148 return -EINVAL;
1149
1150 if (down_interruptible (&dvbdemux->mutex))
1151 return -ERESTARTSYS;
1152
1153 demux->frontend = frontend;
1154 up(&dvbdemux->mutex);
1155 return 0;
1156 }
1157
1158
1159 static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1160 {
1161 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1162
1163 if (down_interruptible (&dvbdemux->mutex))
1164 return -ERESTARTSYS;
1165
1166 demux->frontend = NULL;
1167 up(&dvbdemux->mutex);
1168 return 0;
1169 }
1170
1171
1172 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 *pids)
1173 {
1174 struct dvb_demux *dvbdemux = (struct dvb_demux *) demux;
1175
1176 memcpy(pids, dvbdemux->pids, 5*sizeof(u16));
1177 return 0;
1178 }
1179
1180
1181 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1182 {
1183 int i;
1184 struct dmx_demux *dmx = &dvbdemux->dmx;
1185
1186 dvbdemux->users = 0;
1187 dvbdemux->filter = vmalloc(dvbdemux->filternum*sizeof(struct dvb_demux_filter));
1188
1189 if (!dvbdemux->filter)
1190 return -ENOMEM;
1191
1192 dvbdemux->feed = vmalloc(dvbdemux->feednum*sizeof(struct dvb_demux_feed));
1193 if (!dvbdemux->feed) {
1194 vfree(dvbdemux->filter);
1195 return -ENOMEM;
1196 }
1197 for (i=0; i<dvbdemux->filternum; i++) {
1198 dvbdemux->filter[i].state = DMX_STATE_FREE;
1199 dvbdemux->filter[i].index = i;
1200 }
1201 for (i=0; i<dvbdemux->feednum; i++) {
1202 dvbdemux->feed[i].state = DMX_STATE_FREE;
1203 dvbdemux->feed[i].index = i;
1204 }
1205 dvbdemux->frontend_list.next=
1206 dvbdemux->frontend_list.prev=
1207 &dvbdemux->frontend_list;
1208 for (i=0; i<DMX_TS_PES_OTHER; i++) {
1209 dvbdemux->pesfilter[i] = NULL;
1210 dvbdemux->pids[i] = 0xffff;
1211 }
1212
1213 INIT_LIST_HEAD(&dvbdemux->feed_list);
1214
1215 dvbdemux->playing = 0;
1216 dvbdemux->recording = 0;
1217 dvbdemux->tsbufp = 0;
1218
1219 if (!dvbdemux->check_crc32)
1220 dvbdemux->check_crc32 = dvb_dmx_crc32;
1221
1222 if (!dvbdemux->memcopy)
1223 dvbdemux->memcopy = dvb_dmx_memcopy;
1224
1225 dmx->frontend = NULL;
1226 dmx->priv = (void *) dvbdemux;
1227 dmx->open = dvbdmx_open;
1228 dmx->close = dvbdmx_close;
1229 dmx->write = dvbdmx_write;
1230 dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
1231 dmx->release_ts_feed = dvbdmx_release_ts_feed;
1232 dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
1233 dmx->release_section_feed = dvbdmx_release_section_feed;
1234
1235 dmx->descramble_mac_address = NULL;
1236 dmx->descramble_section_payload = NULL;
1237
1238 dmx->add_frontend = dvbdmx_add_frontend;
1239 dmx->remove_frontend = dvbdmx_remove_frontend;
1240 dmx->get_frontends = dvbdmx_get_frontends;
1241 dmx->connect_frontend = dvbdmx_connect_frontend;
1242 dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
1243 dmx->get_pes_pids = dvbdmx_get_pes_pids;
1244
1245 sema_init(&dvbdemux->mutex, 1);
1246 spin_lock_init(&dvbdemux->lock);
1247
1248 return 0;
1249 }
1250 EXPORT_SYMBOL(dvb_dmx_init);
1251
1252
1253 void dvb_dmx_release(struct dvb_demux *dvbdemux)
1254 {
1255 vfree(dvbdemux->filter);
1256 vfree(dvbdemux->feed);
1257 }
1258 EXPORT_SYMBOL(dvb_dmx_release);
Linus' kernel tree