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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 | ||
1da177e4 LT |
41 | /****************************************************************************** |
42 | * static inlined helper functions | |
43 | ******************************************************************************/ | |
44 | ||
1da177e4 LT |
45 | static inline u16 section_length(const u8 *buf) |
46 | { | |
dad4a730 | 47 | return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; |
1da177e4 LT |
48 | } |
49 | ||
1da177e4 LT |
50 | static inline u16 ts_pid(const u8 *buf) |
51 | { | |
dad4a730 | 52 | return ((buf[1] & 0x1f) << 8) + buf[2]; |
1da177e4 LT |
53 | } |
54 | ||
1da177e4 LT |
55 | static inline u8 payload(const u8 *tsp) |
56 | { | |
dad4a730 | 57 | if (!(tsp[3] & 0x10)) // no payload? |
1da177e4 | 58 | return 0; |
dad4a730 AO |
59 | |
60 | if (tsp[3] & 0x20) { // adaptation field? | |
61 | if (tsp[4] > 183) // corrupted data? | |
1da177e4 LT |
62 | return 0; |
63 | else | |
dad4a730 | 64 | return 184 - 1 - tsp[4]; |
1da177e4 | 65 | } |
dad4a730 | 66 | |
1da177e4 LT |
67 | return 184; |
68 | } | |
69 | ||
dad4a730 | 70 | static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) |
1da177e4 | 71 | { |
dad4a730 | 72 | return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); |
1da177e4 LT |
73 | } |
74 | ||
dad4a730 AO |
75 | static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, |
76 | size_t len) | |
1da177e4 | 77 | { |
dad4a730 | 78 | memcpy(d, s, len); |
1da177e4 LT |
79 | } |
80 | ||
1da177e4 LT |
81 | /****************************************************************************** |
82 | * Software filter functions | |
83 | ******************************************************************************/ | |
84 | ||
dad4a730 AO |
85 | static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, |
86 | const u8 *buf) | |
1da177e4 LT |
87 | { |
88 | int count = payload(buf); | |
89 | int p; | |
90 | //int ccok; | |
91 | //u8 cc; | |
92 | ||
93 | if (count == 0) | |
94 | return -1; | |
95 | ||
dad4a730 | 96 | p = 188 - count; |
1da177e4 LT |
97 | |
98 | /* | |
dad4a730 AO |
99 | cc = buf[3] & 0x0f; |
100 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
101 | feed->cc = cc; | |
1da177e4 LT |
102 | if (!ccok) |
103 | printk("missed packet!\n"); | |
104 | */ | |
105 | ||
dad4a730 | 106 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
107 | feed->peslen = 0xfffa; |
108 | ||
109 | feed->peslen += count; | |
110 | ||
dad4a730 | 111 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); |
1da177e4 LT |
112 | } |
113 | ||
dad4a730 AO |
114 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
115 | struct dvb_demux_filter *f) | |
1da177e4 LT |
116 | { |
117 | u8 neq = 0; | |
118 | int i; | |
119 | ||
dad4a730 | 120 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
121 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
122 | ||
123 | if (f->maskandmode[i] & xor) | |
124 | return 0; | |
125 | ||
126 | neq |= f->maskandnotmode[i] & xor; | |
127 | } | |
128 | ||
129 | if (f->doneq && !neq) | |
130 | return 0; | |
131 | ||
dad4a730 AO |
132 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
133 | NULL, 0, &f->filter, DMX_OK); | |
1da177e4 LT |
134 | } |
135 | ||
dad4a730 | 136 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
137 | { |
138 | struct dvb_demux *demux = feed->demux; | |
139 | struct dvb_demux_filter *f = feed->filter; | |
140 | struct dmx_section_feed *sec = &feed->feed.sec; | |
141 | int section_syntax_indicator; | |
142 | ||
143 | if (!sec->is_filtering) | |
144 | return 0; | |
145 | ||
146 | if (!f) | |
147 | return 0; | |
148 | ||
149 | if (sec->check_crc) { | |
150 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
151 | if (section_syntax_indicator && | |
152 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
153 | return -1; | |
154 | } | |
155 | ||
156 | do { | |
157 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
158 | return -1; | |
159 | } while ((f = f->next) && sec->is_filtering); | |
160 | ||
161 | sec->seclen = 0; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
167 | { | |
168 | struct dmx_section_feed *sec = &feed->feed.sec; | |
169 | ||
170 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 | 171 | if (sec->secbufp < sec->tsfeedp) { |
1da177e4 LT |
172 | int i, n = sec->tsfeedp - sec->secbufp; |
173 | ||
dad4a730 AO |
174 | /* |
175 | * Section padding is done with 0xff bytes entirely. | |
176 | * Due to speed reasons, we won't check all of them | |
177 | * but just first and last. | |
178 | */ | |
179 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
1da177e4 LT |
180 | printk("dvb_demux.c section ts padding loss: %d/%d\n", |
181 | n, sec->tsfeedp); | |
182 | printk("dvb_demux.c pad data:"); | |
dad4a730 | 183 | for (i = 0; i < n; i++) |
1da177e4 LT |
184 | printk(" %02x", sec->secbuf[i]); |
185 | printk("\n"); | |
186 | } | |
187 | } | |
188 | #endif | |
189 | ||
190 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
191 | sec->secbuf = sec->secbuf_base; | |
192 | } | |
193 | ||
194 | /* | |
dad4a730 AO |
195 | * Losless Section Demux 1.4.1 by Emard |
196 | * Valsecchi Patrick: | |
197 | * - middle of section A (no PUSI) | |
198 | * - end of section A and start of section B | |
199 | * (with PUSI pointing to the start of the second section) | |
200 | * | |
201 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
202 | * consisting of the end of section A. Basically because tsfeedp | |
203 | * is incemented and the use=0 condition is not raised | |
204 | * when the second packet arrives. | |
205 | * | |
206 | * Fix: | |
207 | * when demux is started, let feed->pusi_seen = 0 to | |
208 | * prevent initial feeding of garbage from the end of | |
209 | * previous section. When you for the first time see PUSI=1 | |
210 | * then set feed->pusi_seen = 1 | |
211 | */ | |
212 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
213 | const u8 *buf, u8 len) | |
1da177e4 LT |
214 | { |
215 | struct dvb_demux *demux = feed->demux; | |
216 | struct dmx_section_feed *sec = &feed->feed.sec; | |
217 | u16 limit, seclen, n; | |
218 | ||
dad4a730 | 219 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
220 | return 0; |
221 | ||
dad4a730 | 222 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
1da177e4 LT |
223 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
224 | printk("dvb_demux.c section buffer full loss: %d/%d\n", | |
dad4a730 AO |
225 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, |
226 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
227 | #endif |
228 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
229 | } | |
230 | ||
dad4a730 | 231 | if (len <= 0) |
1da177e4 LT |
232 | return 0; |
233 | ||
234 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
235 | sec->tsfeedp += len; | |
236 | ||
dad4a730 AO |
237 | /* |
238 | * Dump all the sections we can find in the data (Emard) | |
239 | */ | |
1da177e4 | 240 | limit = sec->tsfeedp; |
dad4a730 AO |
241 | if (limit > DMX_MAX_SECFEED_SIZE) |
242 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
243 | |
244 | /* to be sure always set secbuf */ | |
245 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
246 | ||
dad4a730 | 247 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 248 | seclen = section_length(sec->secbuf); |
b3967d6c | 249 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 250 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
251 | return 0; |
252 | sec->seclen = seclen; | |
253 | sec->crc_val = ~0; | |
254 | /* dump [secbuf .. secbuf+seclen) */ | |
dad4a730 | 255 | if (feed->pusi_seen) |
1da177e4 LT |
256 | dvb_dmx_swfilter_section_feed(feed); |
257 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
258 | else | |
259 | printk("dvb_demux.c pusi not seen, discarding section data\n"); | |
260 | #endif | |
dad4a730 AO |
261 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
262 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
263 | } |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
dad4a730 AO |
268 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
269 | const u8 *buf) | |
1da177e4 LT |
270 | { |
271 | u8 p, count; | |
272 | int ccok, dc_i = 0; | |
273 | u8 cc; | |
274 | ||
275 | count = payload(buf); | |
276 | ||
dad4a730 | 277 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
278 | return -1; |
279 | ||
dad4a730 | 280 | p = 188 - count; /* payload start */ |
1da177e4 LT |
281 | |
282 | cc = buf[3] & 0x0f; | |
283 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
284 | feed->cc = cc; | |
285 | ||
286 | if (buf[3] & 0x20) { | |
287 | /* adaption field present, check for discontinuity_indicator */ | |
288 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
289 | dc_i = 1; | |
290 | } | |
291 | ||
292 | if (!ccok || dc_i) { | |
293 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
294 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", |
295 | count); | |
296 | /* | |
297 | * those bytes under sume circumstances will again be reported | |
298 | * in the following dvb_dmx_swfilter_section_new | |
299 | */ | |
1da177e4 | 300 | #endif |
dad4a730 AO |
301 | /* |
302 | * Discontinuity detected. Reset pusi_seen = 0 to | |
303 | * stop feeding of suspicious data until next PUSI=1 arrives | |
304 | */ | |
1da177e4 LT |
305 | feed->pusi_seen = 0; |
306 | dvb_dmx_swfilter_section_new(feed); | |
1da177e4 LT |
307 | } |
308 | ||
309 | if (buf[1] & 0x40) { | |
dad4a730 | 310 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 311 | if (count > 1 && buf[p] < count) { |
dad4a730 | 312 | const u8 *before = &buf[p + 1]; |
1da177e4 | 313 | u8 before_len = buf[p]; |
dad4a730 AO |
314 | const u8 *after = &before[before_len]; |
315 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 316 | |
dad4a730 AO |
317 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
318 | before_len); | |
1da177e4 LT |
319 | /* before start of new section, set pusi_seen = 1 */ |
320 | feed->pusi_seen = 1; | |
321 | dvb_dmx_swfilter_section_new(feed); | |
dad4a730 AO |
322 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
323 | after_len); | |
1da177e4 LT |
324 | } |
325 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
326 | else if (count > 0) |
327 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); | |
1da177e4 LT |
328 | #endif |
329 | } else { | |
dad4a730 AO |
330 | /* PUSI=0 (is not set), no section boundary */ |
331 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 332 | } |
dad4a730 | 333 | |
1da177e4 LT |
334 | return 0; |
335 | } | |
336 | ||
dad4a730 AO |
337 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
338 | const u8 *buf) | |
1da177e4 | 339 | { |
dad4a730 | 340 | switch (feed->type) { |
1da177e4 LT |
341 | case DMX_TYPE_TS: |
342 | if (!feed->feed.ts.is_filtering) | |
343 | break; | |
344 | if (feed->ts_type & TS_PACKET) { | |
345 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
346 | dvb_dmx_swfilter_payload(feed, buf); | |
347 | else | |
dad4a730 AO |
348 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, |
349 | DMX_OK); | |
1da177e4 LT |
350 | } |
351 | if (feed->ts_type & TS_DECODER) | |
352 | if (feed->demux->write_to_decoder) | |
353 | feed->demux->write_to_decoder(feed, buf, 188); | |
354 | break; | |
355 | ||
356 | case DMX_TYPE_SEC: | |
357 | if (!feed->feed.sec.is_filtering) | |
358 | break; | |
359 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 360 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
361 | break; |
362 | ||
363 | default: | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | #define DVR_FEED(f) \ | |
369 | (((f)->type == DMX_TYPE_TS) && \ | |
370 | ((f)->feed.ts.is_filtering) && \ | |
371 | (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET)) | |
372 | ||
373 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
374 | { | |
375 | struct dvb_demux_feed *feed; | |
dad4a730 | 376 | struct list_head *pos, *head = &demux->feed_list; |
1da177e4 LT |
377 | u16 pid = ts_pid(buf); |
378 | int dvr_done = 0; | |
379 | ||
380 | list_for_each(pos, head) { | |
381 | feed = list_entry(pos, struct dvb_demux_feed, list_head); | |
382 | ||
383 | if ((feed->pid != pid) && (feed->pid != 0x2000)) | |
384 | continue; | |
385 | ||
386 | /* copy each packet only once to the dvr device, even | |
387 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
388 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
389 | continue; | |
390 | ||
391 | if (feed->pid == pid) { | |
392 | dvb_dmx_swfilter_packet_type(feed, buf); | |
393 | if (DVR_FEED(feed)) | |
394 | continue; | |
395 | } | |
396 | ||
397 | if (feed->pid == 0x2000) | |
398 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); | |
399 | } | |
400 | } | |
401 | ||
dad4a730 AO |
402 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
403 | size_t count) | |
1da177e4 LT |
404 | { |
405 | spin_lock(&demux->lock); | |
406 | ||
407 | while (count--) { | |
dad4a730 AO |
408 | if (buf[0] == 0x47) |
409 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
410 | buf += 188; |
411 | } | |
412 | ||
413 | spin_unlock(&demux->lock); | |
414 | } | |
1da177e4 | 415 | |
dad4a730 | 416 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 LT |
417 | |
418 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) | |
419 | { | |
420 | int p = 0, i, j; | |
421 | ||
422 | spin_lock(&demux->lock); | |
423 | ||
dad4a730 AO |
424 | if (demux->tsbufp) { |
425 | i = demux->tsbufp; | |
426 | j = 188 - i; | |
427 | if (count < j) { | |
1da177e4 LT |
428 | memcpy(&demux->tsbuf[i], buf, count); |
429 | demux->tsbufp += count; | |
430 | goto bailout; | |
431 | } | |
432 | memcpy(&demux->tsbuf[i], buf, j); | |
433 | if (demux->tsbuf[0] == 0x47) | |
434 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
435 | demux->tsbufp = 0; | |
436 | p += j; | |
437 | } | |
438 | ||
439 | while (p < count) { | |
440 | if (buf[p] == 0x47) { | |
dad4a730 AO |
441 | if (count - p >= 188) { |
442 | dvb_dmx_swfilter_packet(demux, &buf[p]); | |
1da177e4 LT |
443 | p += 188; |
444 | } else { | |
dad4a730 AO |
445 | i = count - p; |
446 | memcpy(demux->tsbuf, &buf[p], i); | |
447 | demux->tsbufp = i; | |
1da177e4 LT |
448 | goto bailout; |
449 | } | |
450 | } else | |
451 | p++; | |
452 | } | |
453 | ||
454 | bailout: | |
455 | spin_unlock(&demux->lock); | |
456 | } | |
dad4a730 | 457 | |
1da177e4 LT |
458 | EXPORT_SYMBOL(dvb_dmx_swfilter); |
459 | ||
460 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
461 | { | |
dad4a730 | 462 | int p = 0, i, j; |
1da177e4 | 463 | u8 tmppack[188]; |
dad4a730 | 464 | |
1da177e4 LT |
465 | spin_lock(&demux->lock); |
466 | ||
dad4a730 AO |
467 | if (demux->tsbufp) { |
468 | i = demux->tsbufp; | |
469 | j = 204 - i; | |
470 | if (count < j) { | |
1da177e4 LT |
471 | memcpy(&demux->tsbuf[i], buf, count); |
472 | demux->tsbufp += count; | |
473 | goto bailout; | |
474 | } | |
475 | memcpy(&demux->tsbuf[i], buf, j); | |
ec675bce | 476 | if ((demux->tsbuf[0] == 0x47) || (demux->tsbuf[0] == 0xB8)) { |
1da177e4 | 477 | memcpy(tmppack, demux->tsbuf, 188); |
dad4a730 AO |
478 | if (tmppack[0] == 0xB8) |
479 | tmppack[0] = 0x47; | |
1da177e4 LT |
480 | dvb_dmx_swfilter_packet(demux, tmppack); |
481 | } | |
482 | demux->tsbufp = 0; | |
483 | p += j; | |
484 | } | |
485 | ||
486 | while (p < count) { | |
ec675bce | 487 | if ((buf[p] == 0x47) || (buf[p] == 0xB8)) { |
dad4a730 AO |
488 | if (count - p >= 204) { |
489 | memcpy(tmppack, &buf[p], 188); | |
490 | if (tmppack[0] == 0xB8) | |
491 | tmppack[0] = 0x47; | |
1da177e4 LT |
492 | dvb_dmx_swfilter_packet(demux, tmppack); |
493 | p += 204; | |
494 | } else { | |
dad4a730 AO |
495 | i = count - p; |
496 | memcpy(demux->tsbuf, &buf[p], i); | |
497 | demux->tsbufp = i; | |
1da177e4 LT |
498 | goto bailout; |
499 | } | |
500 | } else { | |
501 | p++; | |
502 | } | |
503 | } | |
504 | ||
505 | bailout: | |
506 | spin_unlock(&demux->lock); | |
507 | } | |
1da177e4 | 508 | |
dad4a730 | 509 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 510 | |
dad4a730 | 511 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
512 | { |
513 | int i; | |
514 | ||
dad4a730 | 515 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
516 | if (demux->filter[i].state == DMX_STATE_FREE) |
517 | break; | |
518 | ||
519 | if (i == demux->filternum) | |
520 | return NULL; | |
521 | ||
522 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
523 | ||
524 | return &demux->filter[i]; | |
525 | } | |
526 | ||
dad4a730 | 527 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
528 | { |
529 | int i; | |
530 | ||
dad4a730 | 531 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
532 | if (demux->feed[i].state == DMX_STATE_FREE) |
533 | break; | |
534 | ||
535 | if (i == demux->feednum) | |
536 | return NULL; | |
537 | ||
538 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
539 | ||
540 | return &demux->feed[i]; | |
541 | } | |
542 | ||
543 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
544 | { | |
545 | struct dvb_demux_feed *entry; | |
546 | ||
547 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
548 | if (entry == feed) | |
549 | return 1; | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
555 | { | |
556 | spin_lock_irq(&feed->demux->lock); | |
557 | if (dvb_demux_feed_find(feed)) { | |
558 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", | |
dad4a730 | 559 | __FUNCTION__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
560 | goto out; |
561 | } | |
562 | ||
563 | list_add(&feed->list_head, &feed->demux->feed_list); | |
564 | out: | |
565 | spin_unlock_irq(&feed->demux->lock); | |
566 | } | |
567 | ||
568 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
569 | { | |
570 | spin_lock_irq(&feed->demux->lock); | |
571 | if (!(dvb_demux_feed_find(feed))) { | |
572 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", | |
dad4a730 | 573 | __FUNCTION__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
574 | goto out; |
575 | } | |
576 | ||
577 | list_del(&feed->list_head); | |
578 | out: | |
579 | spin_unlock_irq(&feed->demux->lock); | |
580 | } | |
581 | ||
dad4a730 AO |
582 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
583 | enum dmx_ts_pes pes_type, | |
584 | size_t circular_buffer_size, struct timespec timeout) | |
1da177e4 | 585 | { |
dad4a730 | 586 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
587 | struct dvb_demux *demux = feed->demux; |
588 | ||
589 | if (pid > DMX_MAX_PID) | |
590 | return -EINVAL; | |
591 | ||
3593cab5 | 592 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
593 | return -ERESTARTSYS; |
594 | ||
595 | if (ts_type & TS_DECODER) { | |
596 | if (pes_type >= DMX_TS_PES_OTHER) { | |
3593cab5 | 597 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
598 | return -EINVAL; |
599 | } | |
600 | ||
601 | if (demux->pesfilter[pes_type] && | |
602 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 603 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
604 | return -EINVAL; |
605 | } | |
606 | ||
607 | demux->pesfilter[pes_type] = feed; | |
608 | demux->pids[pes_type] = pid; | |
609 | } | |
610 | ||
611 | dvb_demux_feed_add(feed); | |
612 | ||
613 | feed->pid = pid; | |
614 | feed->buffer_size = circular_buffer_size; | |
1da177e4 | 615 | feed->timeout = timeout; |
1da177e4 LT |
616 | feed->ts_type = ts_type; |
617 | feed->pes_type = pes_type; | |
618 | ||
1da177e4 LT |
619 | if (feed->buffer_size) { |
620 | #ifdef NOBUFS | |
dad4a730 | 621 | feed->buffer = NULL; |
1da177e4 LT |
622 | #else |
623 | feed->buffer = vmalloc(feed->buffer_size); | |
624 | if (!feed->buffer) { | |
3593cab5 | 625 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
626 | return -ENOMEM; |
627 | } | |
628 | #endif | |
629 | } | |
630 | ||
631 | feed->state = DMX_STATE_READY; | |
3593cab5 | 632 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
633 | |
634 | return 0; | |
635 | } | |
636 | ||
dad4a730 | 637 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 638 | { |
dad4a730 | 639 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
640 | struct dvb_demux *demux = feed->demux; |
641 | int ret; | |
642 | ||
3593cab5 | 643 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
644 | return -ERESTARTSYS; |
645 | ||
646 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 647 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
648 | return -EINVAL; |
649 | } | |
650 | ||
651 | if (!demux->start_feed) { | |
3593cab5 | 652 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
653 | return -ENODEV; |
654 | } | |
655 | ||
656 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 657 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
658 | return ret; |
659 | } | |
660 | ||
661 | spin_lock_irq(&demux->lock); | |
662 | ts_feed->is_filtering = 1; | |
663 | feed->state = DMX_STATE_GO; | |
664 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 665 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
666 | |
667 | return 0; | |
668 | } | |
669 | ||
dad4a730 | 670 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 671 | { |
dad4a730 | 672 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
673 | struct dvb_demux *demux = feed->demux; |
674 | int ret; | |
675 | ||
c2788502 | 676 | mutex_lock(&demux->mutex); |
1da177e4 LT |
677 | |
678 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 679 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
680 | return -EINVAL; |
681 | } | |
682 | ||
683 | if (!demux->stop_feed) { | |
3593cab5 | 684 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
685 | return -ENODEV; |
686 | } | |
687 | ||
688 | ret = demux->stop_feed(feed); | |
689 | ||
690 | spin_lock_irq(&demux->lock); | |
691 | ts_feed->is_filtering = 0; | |
692 | feed->state = DMX_STATE_ALLOCATED; | |
693 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 694 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
695 | |
696 | return ret; | |
697 | } | |
698 | ||
dad4a730 AO |
699 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
700 | struct dmx_ts_feed **ts_feed, | |
701 | dmx_ts_cb callback) | |
1da177e4 | 702 | { |
dad4a730 | 703 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
704 | struct dvb_demux_feed *feed; |
705 | ||
3593cab5 | 706 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
707 | return -ERESTARTSYS; |
708 | ||
709 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 710 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
711 | return -EBUSY; |
712 | } | |
713 | ||
714 | feed->type = DMX_TYPE_TS; | |
715 | feed->cb.ts = callback; | |
716 | feed->demux = demux; | |
717 | feed->pid = 0xffff; | |
718 | feed->peslen = 0xfffa; | |
719 | feed->buffer = NULL; | |
720 | ||
721 | (*ts_feed) = &feed->feed.ts; | |
722 | (*ts_feed)->parent = dmx; | |
723 | (*ts_feed)->priv = NULL; | |
724 | (*ts_feed)->is_filtering = 0; | |
725 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
726 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
727 | (*ts_feed)->set = dmx_ts_feed_set; | |
728 | ||
1da177e4 LT |
729 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
730 | feed->state = DMX_STATE_FREE; | |
3593cab5 | 731 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
732 | return -EBUSY; |
733 | } | |
734 | ||
735 | feed->filter->type = DMX_TYPE_TS; | |
736 | feed->filter->feed = feed; | |
737 | feed->filter->state = DMX_STATE_READY; | |
738 | ||
3593cab5 | 739 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
740 | |
741 | return 0; | |
742 | } | |
743 | ||
dad4a730 AO |
744 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, |
745 | struct dmx_ts_feed *ts_feed) | |
1da177e4 | 746 | { |
dad4a730 AO |
747 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
748 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; | |
1da177e4 | 749 | |
c2788502 | 750 | mutex_lock(&demux->mutex); |
1da177e4 LT |
751 | |
752 | if (feed->state == DMX_STATE_FREE) { | |
3593cab5 | 753 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
754 | return -EINVAL; |
755 | } | |
1da177e4 LT |
756 | #ifndef NOBUFS |
757 | vfree(feed->buffer); | |
dad4a730 | 758 | feed->buffer = NULL; |
1da177e4 LT |
759 | #endif |
760 | ||
761 | feed->state = DMX_STATE_FREE; | |
762 | feed->filter->state = DMX_STATE_FREE; | |
763 | ||
764 | dvb_demux_feed_del(feed); | |
765 | ||
766 | feed->pid = 0xffff; | |
767 | ||
768 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) | |
769 | demux->pesfilter[feed->pes_type] = NULL; | |
770 | ||
3593cab5 | 771 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
772 | return 0; |
773 | } | |
774 | ||
1da177e4 LT |
775 | /****************************************************************************** |
776 | * dmx_section_feed API calls | |
777 | ******************************************************************************/ | |
778 | ||
dad4a730 AO |
779 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
780 | struct dmx_section_filter **filter) | |
1da177e4 | 781 | { |
dad4a730 | 782 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
783 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
784 | struct dvb_demux_filter *dvbdmxfilter; | |
785 | ||
3593cab5 | 786 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
787 | return -ERESTARTSYS; |
788 | ||
789 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
790 | if (!dvbdmxfilter) { | |
3593cab5 | 791 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
792 | return -EBUSY; |
793 | } | |
794 | ||
795 | spin_lock_irq(&dvbdemux->lock); | |
796 | *filter = &dvbdmxfilter->filter; | |
797 | (*filter)->parent = feed; | |
798 | (*filter)->priv = NULL; | |
799 | dvbdmxfilter->feed = dvbdmxfeed; | |
800 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
801 | dvbdmxfilter->state = DMX_STATE_READY; | |
802 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
803 | dvbdmxfeed->filter = dvbdmxfilter; | |
804 | spin_unlock_irq(&dvbdemux->lock); | |
805 | ||
3593cab5 | 806 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
807 | return 0; |
808 | } | |
809 | ||
dad4a730 AO |
810 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
811 | u16 pid, size_t circular_buffer_size, | |
812 | int check_crc) | |
1da177e4 | 813 | { |
dad4a730 | 814 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
815 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
816 | ||
817 | if (pid > 0x1fff) | |
818 | return -EINVAL; | |
819 | ||
3593cab5 | 820 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
821 | return -ERESTARTSYS; |
822 | ||
823 | dvb_demux_feed_add(dvbdmxfeed); | |
824 | ||
825 | dvbdmxfeed->pid = pid; | |
826 | dvbdmxfeed->buffer_size = circular_buffer_size; | |
1da177e4 LT |
827 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
828 | ||
829 | #ifdef NOBUFS | |
830 | dvbdmxfeed->buffer = NULL; | |
831 | #else | |
dad4a730 | 832 | dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size); |
1da177e4 | 833 | if (!dvbdmxfeed->buffer) { |
3593cab5 | 834 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
835 | return -ENOMEM; |
836 | } | |
837 | #endif | |
838 | ||
839 | dvbdmxfeed->state = DMX_STATE_READY; | |
3593cab5 | 840 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
841 | return 0; |
842 | } | |
843 | ||
1da177e4 LT |
844 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
845 | { | |
846 | int i; | |
847 | struct dvb_demux_filter *f; | |
848 | struct dmx_section_filter *sf; | |
849 | u8 mask, mode, doneq; | |
850 | ||
dad4a730 | 851 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
852 | return; |
853 | do { | |
854 | sf = &f->filter; | |
855 | doneq = 0; | |
dad4a730 | 856 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
857 | mode = sf->filter_mode[i]; |
858 | mask = sf->filter_mask[i]; | |
859 | f->maskandmode[i] = mask & mode; | |
860 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
861 | } | |
862 | f->doneq = doneq ? 1 : 0; | |
863 | } while ((f = f->next)); | |
864 | } | |
865 | ||
1da177e4 LT |
866 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
867 | { | |
dad4a730 | 868 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
869 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
870 | int ret; | |
871 | ||
3593cab5 | 872 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
873 | return -ERESTARTSYS; |
874 | ||
875 | if (feed->is_filtering) { | |
3593cab5 | 876 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
877 | return -EBUSY; |
878 | } | |
879 | ||
880 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 881 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
882 | return -EINVAL; |
883 | } | |
884 | ||
885 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
886 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
887 | dvbdmxfeed->feed.sec.secbufp = 0; | |
888 | dvbdmxfeed->feed.sec.seclen = 0; | |
889 | ||
890 | if (!dvbdmx->start_feed) { | |
3593cab5 | 891 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
892 | return -ENODEV; |
893 | } | |
894 | ||
895 | prepare_secfilters(dvbdmxfeed); | |
896 | ||
897 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 898 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
899 | return ret; |
900 | } | |
901 | ||
902 | spin_lock_irq(&dvbdmx->lock); | |
903 | feed->is_filtering = 1; | |
904 | dvbdmxfeed->state = DMX_STATE_GO; | |
905 | spin_unlock_irq(&dvbdmx->lock); | |
906 | ||
3593cab5 | 907 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
908 | return 0; |
909 | } | |
910 | ||
dad4a730 | 911 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 912 | { |
dad4a730 | 913 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
914 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
915 | int ret; | |
916 | ||
c2788502 | 917 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
918 | |
919 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 920 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
921 | return -ENODEV; |
922 | } | |
923 | ||
924 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
925 | ||
926 | spin_lock_irq(&dvbdmx->lock); | |
927 | dvbdmxfeed->state = DMX_STATE_READY; | |
928 | feed->is_filtering = 0; | |
929 | spin_unlock_irq(&dvbdmx->lock); | |
930 | ||
3593cab5 | 931 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
932 | return ret; |
933 | } | |
934 | ||
1da177e4 | 935 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 936 | struct dmx_section_filter *filter) |
1da177e4 | 937 | { |
dad4a730 AO |
938 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
939 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
940 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
941 | ||
c2788502 | 942 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
943 | |
944 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 945 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
946 | return -EINVAL; |
947 | } | |
948 | ||
949 | if (feed->is_filtering) | |
950 | feed->stop_filtering(feed); | |
951 | ||
952 | spin_lock_irq(&dvbdmx->lock); | |
953 | f = dvbdmxfeed->filter; | |
954 | ||
955 | if (f == dvbdmxfilter) { | |
956 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
957 | } else { | |
dad4a730 | 958 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
959 | f = f->next; |
960 | f->next = f->next->next; | |
961 | } | |
962 | ||
963 | dvbdmxfilter->state = DMX_STATE_FREE; | |
964 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 965 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
966 | return 0; |
967 | } | |
968 | ||
969 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
970 | struct dmx_section_feed **feed, | |
971 | dmx_section_cb callback) | |
972 | { | |
dad4a730 | 973 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
974 | struct dvb_demux_feed *dvbdmxfeed; |
975 | ||
3593cab5 | 976 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
977 | return -ERESTARTSYS; |
978 | ||
979 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 980 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
981 | return -EBUSY; |
982 | } | |
983 | ||
984 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
985 | dvbdmxfeed->cb.sec = callback; | |
986 | dvbdmxfeed->demux = dvbdmx; | |
987 | dvbdmxfeed->pid = 0xffff; | |
988 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
989 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
990 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
991 | dvbdmxfeed->filter = NULL; | |
992 | dvbdmxfeed->buffer = NULL; | |
993 | ||
dad4a730 | 994 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
995 | (*feed)->is_filtering = 0; |
996 | (*feed)->parent = demux; | |
997 | (*feed)->priv = NULL; | |
998 | ||
999 | (*feed)->set = dmx_section_feed_set; | |
1000 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1001 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1002 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1003 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1004 | ||
3593cab5 | 1005 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1006 | return 0; |
1007 | } | |
1008 | ||
1009 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1010 | struct dmx_section_feed *feed) | |
1011 | { | |
dad4a730 AO |
1012 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1013 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1014 | |
c2788502 | 1015 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1016 | |
dad4a730 | 1017 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1018 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1019 | return -EINVAL; |
1020 | } | |
1021 | #ifndef NOBUFS | |
1022 | vfree(dvbdmxfeed->buffer); | |
dad4a730 | 1023 | dvbdmxfeed->buffer = NULL; |
1da177e4 | 1024 | #endif |
dad4a730 | 1025 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1026 | |
1027 | dvb_demux_feed_del(dvbdmxfeed); | |
1028 | ||
1029 | dvbdmxfeed->pid = 0xffff; | |
1030 | ||
3593cab5 | 1031 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1032 | return 0; |
1033 | } | |
1034 | ||
1da177e4 LT |
1035 | /****************************************************************************** |
1036 | * dvb_demux kernel data API calls | |
1037 | ******************************************************************************/ | |
1038 | ||
1039 | static int dvbdmx_open(struct dmx_demux *demux) | |
1040 | { | |
dad4a730 | 1041 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1042 | |
1043 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1044 | return -EUSERS; | |
1045 | ||
1046 | dvbdemux->users++; | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1da177e4 LT |
1050 | static int dvbdmx_close(struct dmx_demux *demux) |
1051 | { | |
dad4a730 | 1052 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1053 | |
1054 | if (dvbdemux->users == 0) | |
1055 | return -ENODEV; | |
1056 | ||
1057 | dvbdemux->users--; | |
1058 | //FIXME: release any unneeded resources if users==0 | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1da177e4 LT |
1062 | static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count) |
1063 | { | |
dad4a730 | 1064 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1065 | |
1066 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1067 | return -EINVAL; | |
1068 | ||
3593cab5 | 1069 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
1070 | return -ERESTARTSYS; |
1071 | dvb_dmx_swfilter(dvbdemux, buf, count); | |
3593cab5 | 1072 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1073 | |
1074 | if (signal_pending(current)) | |
1075 | return -EINTR; | |
1076 | return count; | |
1077 | } | |
1078 | ||
dad4a730 AO |
1079 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1080 | struct dmx_frontend *frontend) | |
1da177e4 | 1081 | { |
dad4a730 | 1082 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1083 | struct list_head *head = &dvbdemux->frontend_list; |
1084 | ||
1085 | list_add(&(frontend->connectivity_list), head); | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
dad4a730 AO |
1090 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1091 | struct dmx_frontend *frontend) | |
1da177e4 | 1092 | { |
dad4a730 | 1093 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1094 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1095 | ||
dad4a730 | 1096 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1097 | if (DMX_FE_ENTRY(pos) == frontend) { |
1098 | list_del(pos); | |
1099 | return 0; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | return -ENODEV; | |
1104 | } | |
1105 | ||
dad4a730 | 1106 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1107 | { |
dad4a730 | 1108 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1109 | |
1110 | if (list_empty(&dvbdemux->frontend_list)) | |
1111 | return NULL; | |
dad4a730 | 1112 | |
1da177e4 LT |
1113 | return &dvbdemux->frontend_list; |
1114 | } | |
1115 | ||
dad4a730 AO |
1116 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1117 | struct dmx_frontend *frontend) | |
1da177e4 | 1118 | { |
dad4a730 | 1119 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1120 | |
1121 | if (demux->frontend) | |
1122 | return -EINVAL; | |
1123 | ||
c2788502 | 1124 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1125 | |
1126 | demux->frontend = frontend; | |
3593cab5 | 1127 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1128 | return 0; |
1129 | } | |
1130 | ||
1da177e4 LT |
1131 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1132 | { | |
dad4a730 | 1133 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1134 | |
c2788502 | 1135 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1136 | |
1137 | demux->frontend = NULL; | |
3593cab5 | 1138 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1139 | return 0; |
1140 | } | |
1141 | ||
dad4a730 | 1142 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1143 | { |
dad4a730 | 1144 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1145 | |
dad4a730 | 1146 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1147 | return 0; |
1148 | } | |
1149 | ||
1da177e4 LT |
1150 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1151 | { | |
93653467 | 1152 | int i; |
1da177e4 LT |
1153 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1154 | ||
1155 | dvbdemux->users = 0; | |
dad4a730 | 1156 | dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); |
1da177e4 LT |
1157 | |
1158 | if (!dvbdemux->filter) | |
1159 | return -ENOMEM; | |
1160 | ||
dad4a730 | 1161 | dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); |
1da177e4 LT |
1162 | if (!dvbdemux->feed) { |
1163 | vfree(dvbdemux->filter); | |
1164 | return -ENOMEM; | |
1165 | } | |
dad4a730 | 1166 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1167 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1168 | dvbdemux->filter[i].index = i; | |
1169 | } | |
dad4a730 | 1170 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1171 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1172 | dvbdemux->feed[i].index = i; | |
1173 | } | |
db574d7d AO |
1174 | |
1175 | INIT_LIST_HEAD(&dvbdemux->frontend_list); | |
1176 | ||
dad4a730 | 1177 | for (i = 0; i < DMX_TS_PES_OTHER; i++) { |
1da177e4 LT |
1178 | dvbdemux->pesfilter[i] = NULL; |
1179 | dvbdemux->pids[i] = 0xffff; | |
1180 | } | |
1181 | ||
1182 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1183 | ||
1184 | dvbdemux->playing = 0; | |
1185 | dvbdemux->recording = 0; | |
1186 | dvbdemux->tsbufp = 0; | |
1187 | ||
1188 | if (!dvbdemux->check_crc32) | |
1189 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1190 | ||
dad4a730 AO |
1191 | if (!dvbdemux->memcopy) |
1192 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1193 | |
1194 | dmx->frontend = NULL; | |
dad4a730 | 1195 | dmx->priv = dvbdemux; |
1da177e4 LT |
1196 | dmx->open = dvbdmx_open; |
1197 | dmx->close = dvbdmx_close; | |
1198 | dmx->write = dvbdmx_write; | |
1199 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1200 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1201 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1202 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1203 | ||
1da177e4 LT |
1204 | dmx->add_frontend = dvbdmx_add_frontend; |
1205 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1206 | dmx->get_frontends = dvbdmx_get_frontends; | |
1207 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1208 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1209 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1210 | ||
3593cab5 | 1211 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1212 | spin_lock_init(&dvbdemux->lock); |
1213 | ||
1da177e4 LT |
1214 | return 0; |
1215 | } | |
1da177e4 | 1216 | |
dad4a730 | 1217 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1218 | |
93653467 | 1219 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1220 | { |
1da177e4 LT |
1221 | vfree(dvbdemux->filter); |
1222 | vfree(dvbdemux->feed); | |
1da177e4 | 1223 | } |
dad4a730 | 1224 | |
1da177e4 | 1225 | EXPORT_SYMBOL(dvb_dmx_release); |