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1da177e4 LT |
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 | static LIST_HEAD(dmx_muxs); | |
43 | ||
44 | ||
45 | static int dmx_register_demux(struct dmx_demux *demux) | |
46 | { | |
47 | demux->users = 0; | |
48 | list_add(&demux->reg_list, &dmx_muxs); | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int dmx_unregister_demux(struct dmx_demux* demux) | |
53 | { | |
54 | struct list_head *pos, *n, *head=&dmx_muxs; | |
55 | ||
56 | list_for_each_safe (pos, n, head) { | |
57 | if (DMX_DIR_ENTRY(pos) == demux) { | |
58 | if (demux->users>0) | |
59 | return -EINVAL; | |
60 | list_del(pos); | |
61 | return 0; | |
62 | } | |
63 | } | |
64 | ||
65 | return -ENODEV; | |
66 | } | |
67 | ||
68 | ||
69 | /****************************************************************************** | |
70 | * static inlined helper functions | |
71 | ******************************************************************************/ | |
72 | ||
73 | ||
74 | static inline u16 section_length(const u8 *buf) | |
75 | { | |
76 | return 3+((buf[1]&0x0f)<<8)+buf[2]; | |
77 | } | |
78 | ||
79 | ||
80 | static inline u16 ts_pid(const u8 *buf) | |
81 | { | |
82 | return ((buf[1]&0x1f)<<8)+buf[2]; | |
83 | } | |
84 | ||
85 | ||
86 | static inline u8 payload(const u8 *tsp) | |
87 | { | |
88 | if (!(tsp[3] & 0x10)) // no payload? | |
89 | return 0; | |
90 | if (tsp[3] & 0x20) { // adaptation field? | |
91 | if (tsp[4] > 183) // corrupted data? | |
92 | return 0; | |
93 | else | |
94 | return 184-1-tsp[4]; | |
95 | } | |
96 | return 184; | |
97 | } | |
98 | ||
99 | ||
100 | static u32 dvb_dmx_crc32 (struct dvb_demux_feed *f, const u8 *src, size_t len) | |
101 | { | |
102 | return (f->feed.sec.crc_val = crc32_be (f->feed.sec.crc_val, src, len)); | |
103 | } | |
104 | ||
105 | ||
106 | static void dvb_dmx_memcopy (struct dvb_demux_feed *f, u8 *d, const u8 *s, size_t len) | |
107 | { | |
108 | memcpy (d, s, len); | |
109 | } | |
110 | ||
111 | ||
112 | /****************************************************************************** | |
113 | * Software filter functions | |
114 | ******************************************************************************/ | |
115 | ||
116 | static inline int dvb_dmx_swfilter_payload (struct dvb_demux_feed *feed, const u8 *buf) | |
117 | { | |
118 | int count = payload(buf); | |
119 | int p; | |
120 | //int ccok; | |
121 | //u8 cc; | |
122 | ||
123 | if (count == 0) | |
124 | return -1; | |
125 | ||
126 | p = 188-count; | |
127 | ||
128 | /* | |
129 | cc=buf[3]&0x0f; | |
130 | ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0; | |
131 | dvbdmxfeed->cc=cc; | |
132 | if (!ccok) | |
133 | printk("missed packet!\n"); | |
134 | */ | |
135 | ||
136 | if (buf[1] & 0x40) // PUSI ? | |
137 | feed->peslen = 0xfffa; | |
138 | ||
139 | feed->peslen += count; | |
140 | ||
141 | return feed->cb.ts (&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); | |
142 | } | |
143 | ||
144 | ||
145 | static int dvb_dmx_swfilter_sectionfilter (struct dvb_demux_feed *feed, | |
146 | struct dvb_demux_filter *f) | |
147 | { | |
148 | u8 neq = 0; | |
149 | int i; | |
150 | ||
151 | for (i=0; i<DVB_DEMUX_MASK_MAX; i++) { | |
152 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; | |
153 | ||
154 | if (f->maskandmode[i] & xor) | |
155 | return 0; | |
156 | ||
157 | neq |= f->maskandnotmode[i] & xor; | |
158 | } | |
159 | ||
160 | if (f->doneq && !neq) | |
161 | return 0; | |
162 | ||
163 | return feed->cb.sec (feed->feed.sec.secbuf, feed->feed.sec.seclen, | |
164 | NULL, 0, &f->filter, DMX_OK); | |
165 | } | |
166 | ||
167 | ||
168 | static inline int dvb_dmx_swfilter_section_feed (struct dvb_demux_feed *feed) | |
169 | { | |
170 | struct dvb_demux *demux = feed->demux; | |
171 | struct dvb_demux_filter *f = feed->filter; | |
172 | struct dmx_section_feed *sec = &feed->feed.sec; | |
173 | int section_syntax_indicator; | |
174 | ||
175 | if (!sec->is_filtering) | |
176 | return 0; | |
177 | ||
178 | if (!f) | |
179 | return 0; | |
180 | ||
181 | if (sec->check_crc) { | |
182 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
183 | if (section_syntax_indicator && | |
184 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
185 | return -1; | |
186 | } | |
187 | ||
188 | do { | |
189 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
190 | return -1; | |
191 | } while ((f = f->next) && sec->is_filtering); | |
192 | ||
193 | sec->seclen = 0; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | ||
199 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) | |
200 | { | |
201 | struct dmx_section_feed *sec = &feed->feed.sec; | |
202 | ||
203 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
204 | if(sec->secbufp < sec->tsfeedp) | |
205 | { | |
206 | int i, n = sec->tsfeedp - sec->secbufp; | |
207 | ||
208 | /* section padding is done with 0xff bytes entirely. | |
209 | ** due to speed reasons, we won't check all of them | |
210 | ** but just first and last | |
211 | */ | |
212 | if(sec->secbuf[0] != 0xff || sec->secbuf[n-1] != 0xff) | |
213 | { | |
214 | printk("dvb_demux.c section ts padding loss: %d/%d\n", | |
215 | n, sec->tsfeedp); | |
216 | printk("dvb_demux.c pad data:"); | |
217 | for(i = 0; i < n; i++) | |
218 | printk(" %02x", sec->secbuf[i]); | |
219 | printk("\n"); | |
220 | } | |
221 | } | |
222 | #endif | |
223 | ||
224 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
225 | sec->secbuf = sec->secbuf_base; | |
226 | } | |
227 | ||
228 | /* | |
229 | ** Losless Section Demux 1.4.1 by Emard | |
230 | ** Valsecchi Patrick: | |
231 | ** - middle of section A (no PUSI) | |
232 | ** - end of section A and start of section B | |
233 | ** (with PUSI pointing to the start of the second section) | |
234 | ** | |
235 | ** In this case, without feed->pusi_seen you'll receive a garbage section | |
236 | ** consisting of the end of section A. Basically because tsfeedp | |
237 | ** is incemented and the use=0 condition is not raised | |
238 | ** when the second packet arrives. | |
239 | ** | |
240 | ** Fix: | |
241 | ** when demux is started, let feed->pusi_seen = 0 to | |
242 | ** prevent initial feeding of garbage from the end of | |
243 | ** previous section. When you for the first time see PUSI=1 | |
244 | ** then set feed->pusi_seen = 1 | |
245 | */ | |
246 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, const u8 *buf, u8 len) | |
247 | { | |
248 | struct dvb_demux *demux = feed->demux; | |
249 | struct dmx_section_feed *sec = &feed->feed.sec; | |
250 | u16 limit, seclen, n; | |
251 | ||
252 | if(sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) | |
253 | return 0; | |
254 | ||
255 | if(sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) | |
256 | { | |
257 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
258 | printk("dvb_demux.c section buffer full loss: %d/%d\n", | |
259 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, DMX_MAX_SECFEED_SIZE); | |
260 | #endif | |
261 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
262 | } | |
263 | ||
264 | if(len <= 0) | |
265 | return 0; | |
266 | ||
267 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
268 | sec->tsfeedp += len; | |
269 | ||
270 | /* ----------------------------------------------------- | |
271 | ** Dump all the sections we can find in the data (Emard) | |
272 | */ | |
273 | ||
274 | limit = sec->tsfeedp; | |
275 | if(limit > DMX_MAX_SECFEED_SIZE) | |
276 | return -1; /* internal error should never happen */ | |
277 | ||
278 | /* to be sure always set secbuf */ | |
279 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
280 | ||
281 | for(n = 0; sec->secbufp + 2 < limit; n++) | |
282 | { | |
283 | seclen = section_length(sec->secbuf); | |
284 | if(seclen <= 0 || seclen > DMX_MAX_SECFEED_SIZE | |
285 | || seclen + sec->secbufp > limit) | |
286 | return 0; | |
287 | sec->seclen = seclen; | |
288 | sec->crc_val = ~0; | |
289 | /* dump [secbuf .. secbuf+seclen) */ | |
290 | if(feed->pusi_seen) | |
291 | dvb_dmx_swfilter_section_feed(feed); | |
292 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
293 | else | |
294 | printk("dvb_demux.c pusi not seen, discarding section data\n"); | |
295 | #endif | |
296 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ | |
297 | sec->secbuf += seclen; /* redundand but saves pointer arithmetic */ | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | ||
304 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, const u8 *buf) | |
305 | { | |
306 | u8 p, count; | |
307 | int ccok, dc_i = 0; | |
308 | u8 cc; | |
309 | ||
310 | count = payload(buf); | |
311 | ||
312 | if (count == 0) /* count == 0 if no payload or out of range */ | |
313 | return -1; | |
314 | ||
315 | p = 188 - count; /* payload start */ | |
316 | ||
317 | cc = buf[3] & 0x0f; | |
318 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
319 | feed->cc = cc; | |
320 | ||
321 | if (buf[3] & 0x20) { | |
322 | /* adaption field present, check for discontinuity_indicator */ | |
323 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
324 | dc_i = 1; | |
325 | } | |
326 | ||
327 | if (!ccok || dc_i) { | |
328 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
329 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", count); | |
330 | /* those bytes under sume circumstances will again be reported | |
331 | ** in the following dvb_dmx_swfilter_section_new | |
332 | */ | |
333 | #endif | |
334 | /* Discontinuity detected. Reset pusi_seen = 0 to | |
335 | ** stop feeding of suspicious data until next PUSI=1 arrives | |
336 | */ | |
337 | feed->pusi_seen = 0; | |
338 | dvb_dmx_swfilter_section_new(feed); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | if (buf[1] & 0x40) { | |
343 | // PUSI=1 (is set), section boundary is here | |
344 | if (count > 1 && buf[p] < count) { | |
345 | const u8 *before = buf+p+1; | |
346 | u8 before_len = buf[p]; | |
347 | const u8 *after = before+before_len; | |
348 | u8 after_len = count-1-before_len; | |
349 | ||
350 | dvb_dmx_swfilter_section_copy_dump(feed, before, before_len); | |
351 | /* before start of new section, set pusi_seen = 1 */ | |
352 | feed->pusi_seen = 1; | |
353 | dvb_dmx_swfilter_section_new(feed); | |
354 | dvb_dmx_swfilter_section_copy_dump(feed, after, after_len); | |
355 | } | |
356 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
357 | else | |
358 | if (count > 0) | |
359 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); | |
360 | #endif | |
361 | } else { | |
362 | // PUSI=0 (is not set), no section boundary | |
363 | const u8 *entire = buf+p; | |
364 | u8 entire_len = count; | |
365 | ||
366 | dvb_dmx_swfilter_section_copy_dump(feed, entire, entire_len); | |
367 | } | |
368 | return 0; | |
369 | } | |
370 | ||
371 | ||
372 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, const u8 *buf) | |
373 | { | |
374 | switch(feed->type) { | |
375 | case DMX_TYPE_TS: | |
376 | if (!feed->feed.ts.is_filtering) | |
377 | break; | |
378 | if (feed->ts_type & TS_PACKET) { | |
379 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
380 | dvb_dmx_swfilter_payload(feed, buf); | |
381 | else | |
382 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); | |
383 | } | |
384 | if (feed->ts_type & TS_DECODER) | |
385 | if (feed->demux->write_to_decoder) | |
386 | feed->demux->write_to_decoder(feed, buf, 188); | |
387 | break; | |
388 | ||
389 | case DMX_TYPE_SEC: | |
390 | if (!feed->feed.sec.is_filtering) | |
391 | break; | |
392 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
393 | feed->feed.sec.seclen = feed->feed.sec.secbufp=0; | |
394 | break; | |
395 | ||
396 | default: | |
397 | break; | |
398 | } | |
399 | } | |
400 | ||
401 | #define DVR_FEED(f) \ | |
402 | (((f)->type == DMX_TYPE_TS) && \ | |
403 | ((f)->feed.ts.is_filtering) && \ | |
404 | (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET)) | |
405 | ||
406 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
407 | { | |
408 | struct dvb_demux_feed *feed; | |
409 | struct list_head *pos, *head=&demux->feed_list; | |
410 | u16 pid = ts_pid(buf); | |
411 | int dvr_done = 0; | |
412 | ||
413 | list_for_each(pos, head) { | |
414 | feed = list_entry(pos, struct dvb_demux_feed, list_head); | |
415 | ||
416 | if ((feed->pid != pid) && (feed->pid != 0x2000)) | |
417 | continue; | |
418 | ||
419 | /* copy each packet only once to the dvr device, even | |
420 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
421 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
422 | continue; | |
423 | ||
424 | if (feed->pid == pid) { | |
425 | dvb_dmx_swfilter_packet_type(feed, buf); | |
426 | if (DVR_FEED(feed)) | |
427 | continue; | |
428 | } | |
429 | ||
430 | if (feed->pid == 0x2000) | |
431 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); | |
432 | } | |
433 | } | |
434 | ||
435 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, size_t count) | |
436 | { | |
437 | spin_lock(&demux->lock); | |
438 | ||
439 | while (count--) { | |
440 | if(buf[0] == 0x47) { | |
441 | dvb_dmx_swfilter_packet(demux, buf); | |
442 | } | |
443 | buf += 188; | |
444 | } | |
445 | ||
446 | spin_unlock(&demux->lock); | |
447 | } | |
448 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); | |
449 | ||
450 | ||
451 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) | |
452 | { | |
453 | int p = 0, i, j; | |
454 | ||
455 | spin_lock(&demux->lock); | |
456 | ||
457 | if ((i = demux->tsbufp)) { | |
458 | if (count < (j=188-i)) { | |
459 | memcpy(&demux->tsbuf[i], buf, count); | |
460 | demux->tsbufp += count; | |
461 | goto bailout; | |
462 | } | |
463 | memcpy(&demux->tsbuf[i], buf, j); | |
464 | if (demux->tsbuf[0] == 0x47) | |
465 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
466 | demux->tsbufp = 0; | |
467 | p += j; | |
468 | } | |
469 | ||
470 | while (p < count) { | |
471 | if (buf[p] == 0x47) { | |
472 | if (count-p >= 188) { | |
473 | dvb_dmx_swfilter_packet(demux, buf+p); | |
474 | p += 188; | |
475 | } else { | |
476 | i = count-p; | |
477 | memcpy(demux->tsbuf, buf+p, i); | |
478 | demux->tsbufp=i; | |
479 | goto bailout; | |
480 | } | |
481 | } else | |
482 | p++; | |
483 | } | |
484 | ||
485 | bailout: | |
486 | spin_unlock(&demux->lock); | |
487 | } | |
488 | EXPORT_SYMBOL(dvb_dmx_swfilter); | |
489 | ||
490 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
491 | { | |
492 | int p = 0,i, j; | |
493 | u8 tmppack[188]; | |
494 | spin_lock(&demux->lock); | |
495 | ||
496 | if ((i = demux->tsbufp)) { | |
497 | if (count < (j=204-i)) { | |
498 | memcpy(&demux->tsbuf[i], buf, count); | |
499 | demux->tsbufp += count; | |
500 | goto bailout; | |
501 | } | |
502 | memcpy(&demux->tsbuf[i], buf, j); | |
503 | if ((demux->tsbuf[0] == 0x47)|(demux->tsbuf[0]==0xB8)) { | |
504 | memcpy(tmppack, demux->tsbuf, 188); | |
505 | if (tmppack[0] == 0xB8) tmppack[0] = 0x47; | |
506 | dvb_dmx_swfilter_packet(demux, tmppack); | |
507 | } | |
508 | demux->tsbufp = 0; | |
509 | p += j; | |
510 | } | |
511 | ||
512 | while (p < count) { | |
513 | if ((buf[p] == 0x47)|(buf[p] == 0xB8)) { | |
514 | if (count-p >= 204) { | |
515 | memcpy(tmppack, buf+p, 188); | |
516 | if (tmppack[0] == 0xB8) tmppack[0] = 0x47; | |
517 | dvb_dmx_swfilter_packet(demux, tmppack); | |
518 | p += 204; | |
519 | } else { | |
520 | i = count-p; | |
521 | memcpy(demux->tsbuf, buf+p, i); | |
522 | demux->tsbufp=i; | |
523 | goto bailout; | |
524 | } | |
525 | } else { | |
526 | p++; | |
527 | } | |
528 | } | |
529 | ||
530 | bailout: | |
531 | spin_unlock(&demux->lock); | |
532 | } | |
533 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); | |
534 | ||
535 | ||
536 | static struct dvb_demux_filter * dvb_dmx_filter_alloc(struct dvb_demux *demux) | |
537 | { | |
538 | int i; | |
539 | ||
540 | for (i=0; i<demux->filternum; i++) | |
541 | if (demux->filter[i].state == DMX_STATE_FREE) | |
542 | break; | |
543 | ||
544 | if (i == demux->filternum) | |
545 | return NULL; | |
546 | ||
547 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
548 | ||
549 | return &demux->filter[i]; | |
550 | } | |
551 | ||
552 | static struct dvb_demux_feed * dvb_dmx_feed_alloc(struct dvb_demux *demux) | |
553 | { | |
554 | int i; | |
555 | ||
556 | for (i=0; i<demux->feednum; i++) | |
557 | if (demux->feed[i].state == DMX_STATE_FREE) | |
558 | break; | |
559 | ||
560 | if (i == demux->feednum) | |
561 | return NULL; | |
562 | ||
563 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
564 | ||
565 | return &demux->feed[i]; | |
566 | } | |
567 | ||
568 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
569 | { | |
570 | struct dvb_demux_feed *entry; | |
571 | ||
572 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
573 | if (entry == feed) | |
574 | return 1; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
580 | { | |
581 | spin_lock_irq(&feed->demux->lock); | |
582 | if (dvb_demux_feed_find(feed)) { | |
583 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", | |
584 | __FUNCTION__, feed->type, feed->state, feed->pid); | |
585 | goto out; | |
586 | } | |
587 | ||
588 | list_add(&feed->list_head, &feed->demux->feed_list); | |
589 | out: | |
590 | spin_unlock_irq(&feed->demux->lock); | |
591 | } | |
592 | ||
593 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
594 | { | |
595 | spin_lock_irq(&feed->demux->lock); | |
596 | if (!(dvb_demux_feed_find(feed))) { | |
597 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", | |
598 | __FUNCTION__, feed->type, feed->state, feed->pid); | |
599 | goto out; | |
600 | } | |
601 | ||
602 | list_del(&feed->list_head); | |
603 | out: | |
604 | spin_unlock_irq(&feed->demux->lock); | |
605 | } | |
606 | ||
607 | static int dmx_ts_feed_set (struct dmx_ts_feed* ts_feed, u16 pid, int ts_type, | |
608 | enum dmx_ts_pes pes_type, size_t callback_length, | |
609 | size_t circular_buffer_size, int descramble, | |
610 | struct timespec timeout) | |
611 | { | |
612 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; | |
613 | struct dvb_demux *demux = feed->demux; | |
614 | ||
615 | if (pid > DMX_MAX_PID) | |
616 | return -EINVAL; | |
617 | ||
618 | if (down_interruptible (&demux->mutex)) | |
619 | return -ERESTARTSYS; | |
620 | ||
621 | if (ts_type & TS_DECODER) { | |
622 | if (pes_type >= DMX_TS_PES_OTHER) { | |
623 | up(&demux->mutex); | |
624 | return -EINVAL; | |
625 | } | |
626 | ||
627 | if (demux->pesfilter[pes_type] && | |
628 | demux->pesfilter[pes_type] != feed) { | |
629 | up(&demux->mutex); | |
630 | return -EINVAL; | |
631 | } | |
632 | ||
633 | demux->pesfilter[pes_type] = feed; | |
634 | demux->pids[pes_type] = pid; | |
635 | } | |
636 | ||
637 | dvb_demux_feed_add(feed); | |
638 | ||
639 | feed->pid = pid; | |
640 | feed->buffer_size = circular_buffer_size; | |
641 | feed->descramble = descramble; | |
642 | feed->timeout = timeout; | |
643 | feed->cb_length = callback_length; | |
644 | feed->ts_type = ts_type; | |
645 | feed->pes_type = pes_type; | |
646 | ||
647 | if (feed->descramble) { | |
648 | up(&demux->mutex); | |
649 | return -ENOSYS; | |
650 | } | |
651 | ||
652 | if (feed->buffer_size) { | |
653 | #ifdef NOBUFS | |
654 | feed->buffer=NULL; | |
655 | #else | |
656 | feed->buffer = vmalloc(feed->buffer_size); | |
657 | if (!feed->buffer) { | |
658 | up(&demux->mutex); | |
659 | return -ENOMEM; | |
660 | } | |
661 | #endif | |
662 | } | |
663 | ||
664 | feed->state = DMX_STATE_READY; | |
665 | up(&demux->mutex); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | ||
671 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed* ts_feed) | |
672 | { | |
673 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; | |
674 | struct dvb_demux *demux = feed->demux; | |
675 | int ret; | |
676 | ||
677 | if (down_interruptible (&demux->mutex)) | |
678 | return -ERESTARTSYS; | |
679 | ||
680 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
681 | up(&demux->mutex); | |
682 | return -EINVAL; | |
683 | } | |
684 | ||
685 | if (!demux->start_feed) { | |
686 | up(&demux->mutex); | |
687 | return -ENODEV; | |
688 | } | |
689 | ||
690 | if ((ret = demux->start_feed(feed)) < 0) { | |
691 | up(&demux->mutex); | |
692 | return ret; | |
693 | } | |
694 | ||
695 | spin_lock_irq(&demux->lock); | |
696 | ts_feed->is_filtering = 1; | |
697 | feed->state = DMX_STATE_GO; | |
698 | spin_unlock_irq(&demux->lock); | |
699 | up(&demux->mutex); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed* ts_feed) | |
705 | { | |
706 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; | |
707 | struct dvb_demux *demux = feed->demux; | |
708 | int ret; | |
709 | ||
710 | if (down_interruptible (&demux->mutex)) | |
711 | return -ERESTARTSYS; | |
712 | ||
713 | if (feed->state < DMX_STATE_GO) { | |
714 | up(&demux->mutex); | |
715 | return -EINVAL; | |
716 | } | |
717 | ||
718 | if (!demux->stop_feed) { | |
719 | up(&demux->mutex); | |
720 | return -ENODEV; | |
721 | } | |
722 | ||
723 | ret = demux->stop_feed(feed); | |
724 | ||
725 | spin_lock_irq(&demux->lock); | |
726 | ts_feed->is_filtering = 0; | |
727 | feed->state = DMX_STATE_ALLOCATED; | |
728 | spin_unlock_irq(&demux->lock); | |
729 | up(&demux->mutex); | |
730 | ||
731 | return ret; | |
732 | } | |
733 | ||
734 | static int dvbdmx_allocate_ts_feed (struct dmx_demux *dmx, struct dmx_ts_feed **ts_feed, | |
735 | dmx_ts_cb callback) | |
736 | { | |
737 | struct dvb_demux *demux = (struct dvb_demux *) dmx; | |
738 | struct dvb_demux_feed *feed; | |
739 | ||
740 | if (down_interruptible (&demux->mutex)) | |
741 | return -ERESTARTSYS; | |
742 | ||
743 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
744 | up(&demux->mutex); | |
745 | return -EBUSY; | |
746 | } | |
747 | ||
748 | feed->type = DMX_TYPE_TS; | |
749 | feed->cb.ts = callback; | |
750 | feed->demux = demux; | |
751 | feed->pid = 0xffff; | |
752 | feed->peslen = 0xfffa; | |
753 | feed->buffer = NULL; | |
754 | ||
755 | (*ts_feed) = &feed->feed.ts; | |
756 | (*ts_feed)->parent = dmx; | |
757 | (*ts_feed)->priv = NULL; | |
758 | (*ts_feed)->is_filtering = 0; | |
759 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
760 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
761 | (*ts_feed)->set = dmx_ts_feed_set; | |
762 | ||
763 | ||
764 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { | |
765 | feed->state = DMX_STATE_FREE; | |
766 | up(&demux->mutex); | |
767 | return -EBUSY; | |
768 | } | |
769 | ||
770 | feed->filter->type = DMX_TYPE_TS; | |
771 | feed->filter->feed = feed; | |
772 | feed->filter->state = DMX_STATE_READY; | |
773 | ||
774 | up(&demux->mutex); | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, struct dmx_ts_feed *ts_feed) | |
780 | { | |
781 | struct dvb_demux *demux = (struct dvb_demux *) dmx; | |
782 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; | |
783 | ||
784 | if (down_interruptible (&demux->mutex)) | |
785 | return -ERESTARTSYS; | |
786 | ||
787 | if (feed->state == DMX_STATE_FREE) { | |
788 | up(&demux->mutex); | |
789 | return -EINVAL; | |
790 | } | |
791 | ||
792 | #ifndef NOBUFS | |
793 | vfree(feed->buffer); | |
794 | feed->buffer=0; | |
795 | #endif | |
796 | ||
797 | feed->state = DMX_STATE_FREE; | |
798 | feed->filter->state = DMX_STATE_FREE; | |
799 | ||
800 | dvb_demux_feed_del(feed); | |
801 | ||
802 | feed->pid = 0xffff; | |
803 | ||
804 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) | |
805 | demux->pesfilter[feed->pes_type] = NULL; | |
806 | ||
807 | up(&demux->mutex); | |
808 | return 0; | |
809 | } | |
810 | ||
811 | ||
812 | /****************************************************************************** | |
813 | * dmx_section_feed API calls | |
814 | ******************************************************************************/ | |
815 | ||
816 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed* feed, | |
817 | struct dmx_section_filter** filter) | |
818 | { | |
819 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
820 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; | |
821 | struct dvb_demux_filter *dvbdmxfilter; | |
822 | ||
823 | if (down_interruptible (&dvbdemux->mutex)) | |
824 | return -ERESTARTSYS; | |
825 | ||
826 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
827 | if (!dvbdmxfilter) { | |
828 | up(&dvbdemux->mutex); | |
829 | return -EBUSY; | |
830 | } | |
831 | ||
832 | spin_lock_irq(&dvbdemux->lock); | |
833 | *filter = &dvbdmxfilter->filter; | |
834 | (*filter)->parent = feed; | |
835 | (*filter)->priv = NULL; | |
836 | dvbdmxfilter->feed = dvbdmxfeed; | |
837 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
838 | dvbdmxfilter->state = DMX_STATE_READY; | |
839 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
840 | dvbdmxfeed->filter = dvbdmxfilter; | |
841 | spin_unlock_irq(&dvbdemux->lock); | |
842 | ||
843 | up(&dvbdemux->mutex); | |
844 | return 0; | |
845 | } | |
846 | ||
847 | ||
848 | static int dmx_section_feed_set(struct dmx_section_feed* feed, | |
849 | u16 pid, size_t circular_buffer_size, | |
850 | int descramble, int check_crc) | |
851 | { | |
852 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
853 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
854 | ||
855 | if (pid > 0x1fff) | |
856 | return -EINVAL; | |
857 | ||
858 | if (down_interruptible (&dvbdmx->mutex)) | |
859 | return -ERESTARTSYS; | |
860 | ||
861 | dvb_demux_feed_add(dvbdmxfeed); | |
862 | ||
863 | dvbdmxfeed->pid = pid; | |
864 | dvbdmxfeed->buffer_size = circular_buffer_size; | |
865 | dvbdmxfeed->descramble = descramble; | |
866 | if (dvbdmxfeed->descramble) { | |
867 | up(&dvbdmx->mutex); | |
868 | return -ENOSYS; | |
869 | } | |
870 | ||
871 | dvbdmxfeed->feed.sec.check_crc = check_crc; | |
872 | ||
873 | #ifdef NOBUFS | |
874 | dvbdmxfeed->buffer = NULL; | |
875 | #else | |
876 | dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size); | |
877 | if (!dvbdmxfeed->buffer) { | |
878 | up(&dvbdmx->mutex); | |
879 | return -ENOMEM; | |
880 | } | |
881 | #endif | |
882 | ||
883 | dvbdmxfeed->state = DMX_STATE_READY; | |
884 | up(&dvbdmx->mutex); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | ||
889 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) | |
890 | { | |
891 | int i; | |
892 | struct dvb_demux_filter *f; | |
893 | struct dmx_section_filter *sf; | |
894 | u8 mask, mode, doneq; | |
895 | ||
896 | if (!(f=dvbdmxfeed->filter)) | |
897 | return; | |
898 | do { | |
899 | sf = &f->filter; | |
900 | doneq = 0; | |
901 | for (i=0; i<DVB_DEMUX_MASK_MAX; i++) { | |
902 | mode = sf->filter_mode[i]; | |
903 | mask = sf->filter_mask[i]; | |
904 | f->maskandmode[i] = mask & mode; | |
905 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
906 | } | |
907 | f->doneq = doneq ? 1 : 0; | |
908 | } while ((f = f->next)); | |
909 | } | |
910 | ||
911 | ||
912 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) | |
913 | { | |
914 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
915 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
916 | int ret; | |
917 | ||
918 | if (down_interruptible (&dvbdmx->mutex)) | |
919 | return -ERESTARTSYS; | |
920 | ||
921 | if (feed->is_filtering) { | |
922 | up(&dvbdmx->mutex); | |
923 | return -EBUSY; | |
924 | } | |
925 | ||
926 | if (!dvbdmxfeed->filter) { | |
927 | up(&dvbdmx->mutex); | |
928 | return -EINVAL; | |
929 | } | |
930 | ||
931 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
932 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
933 | dvbdmxfeed->feed.sec.secbufp = 0; | |
934 | dvbdmxfeed->feed.sec.seclen = 0; | |
935 | ||
936 | if (!dvbdmx->start_feed) { | |
937 | up(&dvbdmx->mutex); | |
938 | return -ENODEV; | |
939 | } | |
940 | ||
941 | prepare_secfilters(dvbdmxfeed); | |
942 | ||
943 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
944 | up(&dvbdmx->mutex); | |
945 | return ret; | |
946 | } | |
947 | ||
948 | spin_lock_irq(&dvbdmx->lock); | |
949 | feed->is_filtering = 1; | |
950 | dvbdmxfeed->state = DMX_STATE_GO; | |
951 | spin_unlock_irq(&dvbdmx->lock); | |
952 | ||
953 | up(&dvbdmx->mutex); | |
954 | return 0; | |
955 | } | |
956 | ||
957 | ||
958 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed* feed) | |
959 | { | |
960 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
961 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
962 | int ret; | |
963 | ||
964 | if (down_interruptible (&dvbdmx->mutex)) | |
965 | return -ERESTARTSYS; | |
966 | ||
967 | if (!dvbdmx->stop_feed) { | |
968 | up(&dvbdmx->mutex); | |
969 | return -ENODEV; | |
970 | } | |
971 | ||
972 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
973 | ||
974 | spin_lock_irq(&dvbdmx->lock); | |
975 | dvbdmxfeed->state = DMX_STATE_READY; | |
976 | feed->is_filtering = 0; | |
977 | spin_unlock_irq(&dvbdmx->lock); | |
978 | ||
979 | up(&dvbdmx->mutex); | |
980 | return ret; | |
981 | } | |
982 | ||
983 | ||
984 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, | |
985 | struct dmx_section_filter* filter) | |
986 | { | |
987 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *) filter, *f; | |
988 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
989 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
990 | ||
991 | if (down_interruptible (&dvbdmx->mutex)) | |
992 | return -ERESTARTSYS; | |
993 | ||
994 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
995 | up(&dvbdmx->mutex); | |
996 | return -EINVAL; | |
997 | } | |
998 | ||
999 | if (feed->is_filtering) | |
1000 | feed->stop_filtering(feed); | |
1001 | ||
1002 | spin_lock_irq(&dvbdmx->lock); | |
1003 | f = dvbdmxfeed->filter; | |
1004 | ||
1005 | if (f == dvbdmxfilter) { | |
1006 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
1007 | } else { | |
1008 | while(f->next != dvbdmxfilter) | |
1009 | f = f->next; | |
1010 | f->next = f->next->next; | |
1011 | } | |
1012 | ||
1013 | dvbdmxfilter->state = DMX_STATE_FREE; | |
1014 | spin_unlock_irq(&dvbdmx->lock); | |
1015 | up(&dvbdmx->mutex); | |
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
1020 | struct dmx_section_feed **feed, | |
1021 | dmx_section_cb callback) | |
1022 | { | |
1023 | struct dvb_demux *dvbdmx = (struct dvb_demux *) demux; | |
1024 | struct dvb_demux_feed *dvbdmxfeed; | |
1025 | ||
1026 | if (down_interruptible (&dvbdmx->mutex)) | |
1027 | return -ERESTARTSYS; | |
1028 | ||
1029 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
1030 | up(&dvbdmx->mutex); | |
1031 | return -EBUSY; | |
1032 | } | |
1033 | ||
1034 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
1035 | dvbdmxfeed->cb.sec = callback; | |
1036 | dvbdmxfeed->demux = dvbdmx; | |
1037 | dvbdmxfeed->pid = 0xffff; | |
1038 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
1039 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
1040 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
1041 | dvbdmxfeed->filter = NULL; | |
1042 | dvbdmxfeed->buffer = NULL; | |
1043 | ||
1044 | (*feed)=&dvbdmxfeed->feed.sec; | |
1045 | (*feed)->is_filtering = 0; | |
1046 | (*feed)->parent = demux; | |
1047 | (*feed)->priv = NULL; | |
1048 | ||
1049 | (*feed)->set = dmx_section_feed_set; | |
1050 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1051 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1052 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1053 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1054 | ||
1055 | up(&dvbdmx->mutex); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1060 | struct dmx_section_feed *feed) | |
1061 | { | |
1062 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; | |
1063 | struct dvb_demux *dvbdmx = (struct dvb_demux *) demux; | |
1064 | ||
1065 | if (down_interruptible (&dvbdmx->mutex)) | |
1066 | return -ERESTARTSYS; | |
1067 | ||
1068 | if (dvbdmxfeed->state==DMX_STATE_FREE) { | |
1069 | up(&dvbdmx->mutex); | |
1070 | return -EINVAL; | |
1071 | } | |
1072 | #ifndef NOBUFS | |
1073 | vfree(dvbdmxfeed->buffer); | |
1074 | dvbdmxfeed->buffer=0; | |
1075 | #endif | |
1076 | dvbdmxfeed->state=DMX_STATE_FREE; | |
1077 | ||
1078 | dvb_demux_feed_del(dvbdmxfeed); | |
1079 | ||
1080 | dvbdmxfeed->pid = 0xffff; | |
1081 | ||
1082 | up(&dvbdmx->mutex); | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | ||
1087 | /****************************************************************************** | |
1088 | * dvb_demux kernel data API calls | |
1089 | ******************************************************************************/ | |
1090 | ||
1091 | static int dvbdmx_open(struct dmx_demux *demux) | |
1092 | { | |
1093 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1094 | ||
1095 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1096 | return -EUSERS; | |
1097 | ||
1098 | dvbdemux->users++; | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | ||
1103 | static int dvbdmx_close(struct dmx_demux *demux) | |
1104 | { | |
1105 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1106 | ||
1107 | if (dvbdemux->users == 0) | |
1108 | return -ENODEV; | |
1109 | ||
1110 | dvbdemux->users--; | |
1111 | //FIXME: release any unneeded resources if users==0 | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | ||
1116 | static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count) | |
1117 | { | |
1118 | struct dvb_demux *dvbdemux=(struct dvb_demux *) demux; | |
1119 | ||
1120 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | if (down_interruptible (&dvbdemux->mutex)) | |
1124 | return -ERESTARTSYS; | |
1125 | dvb_dmx_swfilter(dvbdemux, buf, count); | |
1126 | up(&dvbdemux->mutex); | |
1127 | ||
1128 | if (signal_pending(current)) | |
1129 | return -EINTR; | |
1130 | return count; | |
1131 | } | |
1132 | ||
1133 | ||
1134 | static int dvbdmx_add_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) | |
1135 | { | |
1136 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1137 | struct list_head *head = &dvbdemux->frontend_list; | |
1138 | ||
1139 | list_add(&(frontend->connectivity_list), head); | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | ||
1145 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) | |
1146 | { | |
1147 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1148 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; | |
1149 | ||
1150 | list_for_each_safe (pos, n, head) { | |
1151 | if (DMX_FE_ENTRY(pos) == frontend) { | |
1152 | list_del(pos); | |
1153 | return 0; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | return -ENODEV; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | static struct list_head * dvbdmx_get_frontends(struct dmx_demux *demux) | |
1162 | { | |
1163 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1164 | ||
1165 | if (list_empty(&dvbdemux->frontend_list)) | |
1166 | return NULL; | |
1167 | return &dvbdemux->frontend_list; | |
1168 | } | |
1169 | ||
1170 | ||
1171 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) | |
1172 | { | |
1173 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1174 | ||
1175 | if (demux->frontend) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | if (down_interruptible (&dvbdemux->mutex)) | |
1179 | return -ERESTARTSYS; | |
1180 | ||
1181 | demux->frontend = frontend; | |
1182 | up(&dvbdemux->mutex); | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | ||
1187 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) | |
1188 | { | |
1189 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1190 | ||
1191 | if (down_interruptible (&dvbdemux->mutex)) | |
1192 | return -ERESTARTSYS; | |
1193 | ||
1194 | demux->frontend = NULL; | |
1195 | up(&dvbdemux->mutex); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | ||
1200 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 *pids) | |
1201 | { | |
1202 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; | |
1203 | ||
1204 | memcpy(pids, dvbdemux->pids, 5*sizeof(u16)); | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | ||
1209 | int dvb_dmx_init(struct dvb_demux *dvbdemux) | |
1210 | { | |
1211 | int i, err; | |
1212 | struct dmx_demux *dmx = &dvbdemux->dmx; | |
1213 | ||
1214 | dvbdemux->users = 0; | |
1215 | dvbdemux->filter = vmalloc(dvbdemux->filternum*sizeof(struct dvb_demux_filter)); | |
1216 | ||
1217 | if (!dvbdemux->filter) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | dvbdemux->feed = vmalloc(dvbdemux->feednum*sizeof(struct dvb_demux_feed)); | |
1221 | if (!dvbdemux->feed) { | |
1222 | vfree(dvbdemux->filter); | |
1223 | return -ENOMEM; | |
1224 | } | |
1225 | for (i=0; i<dvbdemux->filternum; i++) { | |
1226 | dvbdemux->filter[i].state = DMX_STATE_FREE; | |
1227 | dvbdemux->filter[i].index = i; | |
1228 | } | |
1229 | for (i=0; i<dvbdemux->feednum; i++) { | |
1230 | dvbdemux->feed[i].state = DMX_STATE_FREE; | |
1231 | dvbdemux->feed[i].index = i; | |
1232 | } | |
1233 | dvbdemux->frontend_list.next= | |
1234 | dvbdemux->frontend_list.prev= | |
1235 | &dvbdemux->frontend_list; | |
1236 | for (i=0; i<DMX_TS_PES_OTHER; i++) { | |
1237 | dvbdemux->pesfilter[i] = NULL; | |
1238 | dvbdemux->pids[i] = 0xffff; | |
1239 | } | |
1240 | ||
1241 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1242 | ||
1243 | dvbdemux->playing = 0; | |
1244 | dvbdemux->recording = 0; | |
1245 | dvbdemux->tsbufp = 0; | |
1246 | ||
1247 | if (!dvbdemux->check_crc32) | |
1248 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1249 | ||
1250 | if (!dvbdemux->memcopy) | |
1251 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1252 | ||
1253 | dmx->frontend = NULL; | |
1254 | dmx->reg_list.prev = dmx->reg_list.next = &dmx->reg_list; | |
1255 | dmx->priv = (void *) dvbdemux; | |
1256 | dmx->open = dvbdmx_open; | |
1257 | dmx->close = dvbdmx_close; | |
1258 | dmx->write = dvbdmx_write; | |
1259 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1260 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1261 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1262 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1263 | ||
1264 | dmx->descramble_mac_address = NULL; | |
1265 | dmx->descramble_section_payload = NULL; | |
1266 | ||
1267 | dmx->add_frontend = dvbdmx_add_frontend; | |
1268 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1269 | dmx->get_frontends = dvbdmx_get_frontends; | |
1270 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1271 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1272 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1273 | ||
1274 | sema_init(&dvbdemux->mutex, 1); | |
1275 | spin_lock_init(&dvbdemux->lock); | |
1276 | ||
1277 | if ((err = dmx_register_demux(dmx)) < 0) | |
1278 | return err; | |
1279 | ||
1280 | return 0; | |
1281 | } | |
1282 | EXPORT_SYMBOL(dvb_dmx_init); | |
1283 | ||
1284 | ||
1285 | int dvb_dmx_release(struct dvb_demux *dvbdemux) | |
1286 | { | |
1287 | struct dmx_demux *dmx = &dvbdemux->dmx; | |
1288 | ||
1289 | dmx_unregister_demux(dmx); | |
1290 | vfree(dvbdemux->filter); | |
1291 | vfree(dvbdemux->feed); | |
1292 | return 0; | |
1293 | } | |
1294 | EXPORT_SYMBOL(dvb_dmx_release); |