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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 | ||
a99bbaf5 | 24 | #include <linux/sched.h> |
1da177e4 LT |
25 | #include <linux/spinlock.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/vmalloc.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/poll.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/crc32.h> | |
32 | #include <asm/uaccess.h> | |
26b9d6c0 | 33 | #include <asm/div64.h> |
1da177e4 LT |
34 | |
35 | #include "dvb_demux.h" | |
36 | ||
37 | #define NOBUFS | |
38 | /* | |
39 | ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog | |
40 | */ | |
41 | // #define DVB_DEMUX_SECTION_LOSS_LOG | |
42 | ||
0d834635 AO |
43 | static int dvb_demux_tscheck; |
44 | module_param(dvb_demux_tscheck, int, 0644); | |
45 | MODULE_PARM_DESC(dvb_demux_tscheck, | |
46 | "enable transport stream continuity and TEI check"); | |
47 | ||
26b9d6c0 AO |
48 | static int dvb_demux_speedcheck; |
49 | module_param(dvb_demux_speedcheck, int, 0644); | |
50 | MODULE_PARM_DESC(dvb_demux_speedcheck, | |
51 | "enable transport stream speed check"); | |
52 | ||
ae530205 MK |
53 | static int dvb_demux_feed_err_pkts = 1; |
54 | module_param(dvb_demux_feed_err_pkts, int, 0644); | |
55 | MODULE_PARM_DESC(dvb_demux_feed_err_pkts, | |
56 | "when set to 0, drop packets with the TEI bit set (1 by default)"); | |
57 | ||
0d834635 AO |
58 | #define dprintk_tscheck(x...) do { \ |
59 | if (dvb_demux_tscheck && printk_ratelimit()) \ | |
60 | printk(x); \ | |
61 | } while (0) | |
62 | ||
1da177e4 LT |
63 | /****************************************************************************** |
64 | * static inlined helper functions | |
65 | ******************************************************************************/ | |
66 | ||
1da177e4 LT |
67 | static inline u16 section_length(const u8 *buf) |
68 | { | |
dad4a730 | 69 | return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; |
1da177e4 LT |
70 | } |
71 | ||
1da177e4 LT |
72 | static inline u16 ts_pid(const u8 *buf) |
73 | { | |
dad4a730 | 74 | return ((buf[1] & 0x1f) << 8) + buf[2]; |
1da177e4 LT |
75 | } |
76 | ||
1da177e4 LT |
77 | static inline u8 payload(const u8 *tsp) |
78 | { | |
dad4a730 | 79 | if (!(tsp[3] & 0x10)) // no payload? |
1da177e4 | 80 | return 0; |
dad4a730 AO |
81 | |
82 | if (tsp[3] & 0x20) { // adaptation field? | |
83 | if (tsp[4] > 183) // corrupted data? | |
1da177e4 LT |
84 | return 0; |
85 | else | |
dad4a730 | 86 | return 184 - 1 - tsp[4]; |
1da177e4 | 87 | } |
dad4a730 | 88 | |
1da177e4 LT |
89 | return 184; |
90 | } | |
91 | ||
dad4a730 | 92 | static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) |
1da177e4 | 93 | { |
dad4a730 | 94 | return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); |
1da177e4 LT |
95 | } |
96 | ||
dad4a730 AO |
97 | static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, |
98 | size_t len) | |
1da177e4 | 99 | { |
dad4a730 | 100 | memcpy(d, s, len); |
1da177e4 LT |
101 | } |
102 | ||
1da177e4 LT |
103 | /****************************************************************************** |
104 | * Software filter functions | |
105 | ******************************************************************************/ | |
106 | ||
dad4a730 AO |
107 | static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, |
108 | const u8 *buf) | |
1da177e4 LT |
109 | { |
110 | int count = payload(buf); | |
111 | int p; | |
112 | //int ccok; | |
113 | //u8 cc; | |
114 | ||
115 | if (count == 0) | |
116 | return -1; | |
117 | ||
dad4a730 | 118 | p = 188 - count; |
1da177e4 LT |
119 | |
120 | /* | |
dad4a730 AO |
121 | cc = buf[3] & 0x0f; |
122 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
123 | feed->cc = cc; | |
1da177e4 LT |
124 | if (!ccok) |
125 | printk("missed packet!\n"); | |
126 | */ | |
127 | ||
dad4a730 | 128 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
129 | feed->peslen = 0xfffa; |
130 | ||
131 | feed->peslen += count; | |
132 | ||
2f684b23 | 133 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts); |
1da177e4 LT |
134 | } |
135 | ||
dad4a730 AO |
136 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
137 | struct dvb_demux_filter *f) | |
1da177e4 LT |
138 | { |
139 | u8 neq = 0; | |
140 | int i; | |
141 | ||
dad4a730 | 142 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
143 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
144 | ||
145 | if (f->maskandmode[i] & xor) | |
146 | return 0; | |
147 | ||
148 | neq |= f->maskandnotmode[i] & xor; | |
149 | } | |
150 | ||
151 | if (f->doneq && !neq) | |
152 | return 0; | |
153 | ||
dad4a730 | 154 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
2f684b23 | 155 | NULL, 0, &f->filter); |
1da177e4 LT |
156 | } |
157 | ||
dad4a730 | 158 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
159 | { |
160 | struct dvb_demux *demux = feed->demux; | |
161 | struct dvb_demux_filter *f = feed->filter; | |
162 | struct dmx_section_feed *sec = &feed->feed.sec; | |
163 | int section_syntax_indicator; | |
164 | ||
165 | if (!sec->is_filtering) | |
166 | return 0; | |
167 | ||
168 | if (!f) | |
169 | return 0; | |
170 | ||
171 | if (sec->check_crc) { | |
172 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
173 | if (section_syntax_indicator && | |
174 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
175 | return -1; | |
176 | } | |
177 | ||
178 | do { | |
179 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
180 | return -1; | |
181 | } while ((f = f->next) && sec->is_filtering); | |
182 | ||
183 | sec->seclen = 0; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
1da177e4 LT |
188 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
189 | { | |
190 | struct dmx_section_feed *sec = &feed->feed.sec; | |
191 | ||
192 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 | 193 | if (sec->secbufp < sec->tsfeedp) { |
1da177e4 LT |
194 | int i, n = sec->tsfeedp - sec->secbufp; |
195 | ||
dad4a730 AO |
196 | /* |
197 | * Section padding is done with 0xff bytes entirely. | |
198 | * Due to speed reasons, we won't check all of them | |
199 | * but just first and last. | |
200 | */ | |
201 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
1da177e4 LT |
202 | printk("dvb_demux.c section ts padding loss: %d/%d\n", |
203 | n, sec->tsfeedp); | |
204 | printk("dvb_demux.c pad data:"); | |
dad4a730 | 205 | for (i = 0; i < n; i++) |
1da177e4 LT |
206 | printk(" %02x", sec->secbuf[i]); |
207 | printk("\n"); | |
208 | } | |
209 | } | |
210 | #endif | |
211 | ||
212 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
213 | sec->secbuf = sec->secbuf_base; | |
214 | } | |
215 | ||
216 | /* | |
dad4a730 AO |
217 | * Losless Section Demux 1.4.1 by Emard |
218 | * Valsecchi Patrick: | |
219 | * - middle of section A (no PUSI) | |
220 | * - end of section A and start of section B | |
221 | * (with PUSI pointing to the start of the second section) | |
222 | * | |
223 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
224 | * consisting of the end of section A. Basically because tsfeedp | |
225 | * is incemented and the use=0 condition is not raised | |
226 | * when the second packet arrives. | |
227 | * | |
228 | * Fix: | |
229 | * when demux is started, let feed->pusi_seen = 0 to | |
230 | * prevent initial feeding of garbage from the end of | |
231 | * previous section. When you for the first time see PUSI=1 | |
232 | * then set feed->pusi_seen = 1 | |
233 | */ | |
234 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
235 | const u8 *buf, u8 len) | |
1da177e4 LT |
236 | { |
237 | struct dvb_demux *demux = feed->demux; | |
238 | struct dmx_section_feed *sec = &feed->feed.sec; | |
239 | u16 limit, seclen, n; | |
240 | ||
dad4a730 | 241 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
242 | return 0; |
243 | ||
dad4a730 | 244 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
1da177e4 LT |
245 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
246 | printk("dvb_demux.c section buffer full loss: %d/%d\n", | |
dad4a730 AO |
247 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, |
248 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
249 | #endif |
250 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
251 | } | |
252 | ||
dad4a730 | 253 | if (len <= 0) |
1da177e4 LT |
254 | return 0; |
255 | ||
256 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
257 | sec->tsfeedp += len; | |
258 | ||
dad4a730 AO |
259 | /* |
260 | * Dump all the sections we can find in the data (Emard) | |
261 | */ | |
1da177e4 | 262 | limit = sec->tsfeedp; |
dad4a730 AO |
263 | if (limit > DMX_MAX_SECFEED_SIZE) |
264 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
265 | |
266 | /* to be sure always set secbuf */ | |
267 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
268 | ||
dad4a730 | 269 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 270 | seclen = section_length(sec->secbuf); |
b3967d6c | 271 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 272 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
273 | return 0; |
274 | sec->seclen = seclen; | |
275 | sec->crc_val = ~0; | |
276 | /* dump [secbuf .. secbuf+seclen) */ | |
dad4a730 | 277 | if (feed->pusi_seen) |
1da177e4 LT |
278 | dvb_dmx_swfilter_section_feed(feed); |
279 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
280 | else | |
281 | printk("dvb_demux.c pusi not seen, discarding section data\n"); | |
282 | #endif | |
dad4a730 AO |
283 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
284 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
285 | } |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
dad4a730 AO |
290 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
291 | const u8 *buf) | |
1da177e4 LT |
292 | { |
293 | u8 p, count; | |
294 | int ccok, dc_i = 0; | |
295 | u8 cc; | |
296 | ||
297 | count = payload(buf); | |
298 | ||
dad4a730 | 299 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
300 | return -1; |
301 | ||
dad4a730 | 302 | p = 188 - count; /* payload start */ |
1da177e4 LT |
303 | |
304 | cc = buf[3] & 0x0f; | |
305 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
306 | feed->cc = cc; | |
307 | ||
308 | if (buf[3] & 0x20) { | |
309 | /* adaption field present, check for discontinuity_indicator */ | |
310 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
311 | dc_i = 1; | |
312 | } | |
313 | ||
314 | if (!ccok || dc_i) { | |
315 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
316 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", |
317 | count); | |
318 | /* | |
319 | * those bytes under sume circumstances will again be reported | |
320 | * in the following dvb_dmx_swfilter_section_new | |
321 | */ | |
1da177e4 | 322 | #endif |
dad4a730 AO |
323 | /* |
324 | * Discontinuity detected. Reset pusi_seen = 0 to | |
325 | * stop feeding of suspicious data until next PUSI=1 arrives | |
326 | */ | |
1da177e4 LT |
327 | feed->pusi_seen = 0; |
328 | dvb_dmx_swfilter_section_new(feed); | |
1da177e4 LT |
329 | } |
330 | ||
331 | if (buf[1] & 0x40) { | |
dad4a730 | 332 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 333 | if (count > 1 && buf[p] < count) { |
dad4a730 | 334 | const u8 *before = &buf[p + 1]; |
1da177e4 | 335 | u8 before_len = buf[p]; |
dad4a730 AO |
336 | const u8 *after = &before[before_len]; |
337 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 338 | |
dad4a730 AO |
339 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
340 | before_len); | |
1da177e4 LT |
341 | /* before start of new section, set pusi_seen = 1 */ |
342 | feed->pusi_seen = 1; | |
343 | dvb_dmx_swfilter_section_new(feed); | |
dad4a730 AO |
344 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
345 | after_len); | |
1da177e4 LT |
346 | } |
347 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
348 | else if (count > 0) |
349 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); | |
1da177e4 LT |
350 | #endif |
351 | } else { | |
dad4a730 AO |
352 | /* PUSI=0 (is not set), no section boundary */ |
353 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 354 | } |
dad4a730 | 355 | |
1da177e4 LT |
356 | return 0; |
357 | } | |
358 | ||
dad4a730 AO |
359 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
360 | const u8 *buf) | |
1da177e4 | 361 | { |
dad4a730 | 362 | switch (feed->type) { |
1da177e4 LT |
363 | case DMX_TYPE_TS: |
364 | if (!feed->feed.ts.is_filtering) | |
365 | break; | |
366 | if (feed->ts_type & TS_PACKET) { | |
367 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
368 | dvb_dmx_swfilter_payload(feed, buf); | |
369 | else | |
2f684b23 | 370 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts); |
1da177e4 LT |
371 | } |
372 | if (feed->ts_type & TS_DECODER) | |
373 | if (feed->demux->write_to_decoder) | |
374 | feed->demux->write_to_decoder(feed, buf, 188); | |
375 | break; | |
376 | ||
377 | case DMX_TYPE_SEC: | |
378 | if (!feed->feed.sec.is_filtering) | |
379 | break; | |
380 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 381 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
382 | break; |
383 | ||
384 | default: | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
389 | #define DVR_FEED(f) \ | |
390 | (((f)->type == DMX_TYPE_TS) && \ | |
391 | ((f)->feed.ts.is_filtering) && \ | |
4a24ce3a | 392 | (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) |
1da177e4 LT |
393 | |
394 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
395 | { | |
396 | struct dvb_demux_feed *feed; | |
1da177e4 LT |
397 | u16 pid = ts_pid(buf); |
398 | int dvr_done = 0; | |
399 | ||
26b9d6c0 AO |
400 | if (dvb_demux_speedcheck) { |
401 | struct timespec cur_time, delta_time; | |
402 | u64 speed_bytes, speed_timedelta; | |
403 | ||
404 | demux->speed_pkts_cnt++; | |
405 | ||
406 | /* show speed every SPEED_PKTS_INTERVAL packets */ | |
407 | if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) { | |
408 | cur_time = current_kernel_time(); | |
409 | ||
410 | if (demux->speed_last_time.tv_sec != 0 && | |
411 | demux->speed_last_time.tv_nsec != 0) { | |
412 | delta_time = timespec_sub(cur_time, | |
413 | demux->speed_last_time); | |
414 | speed_bytes = (u64)demux->speed_pkts_cnt | |
415 | * 188 * 8; | |
416 | /* convert to 1024 basis */ | |
417 | speed_bytes = 1000 * div64_u64(speed_bytes, | |
418 | 1024); | |
419 | speed_timedelta = | |
420 | (u64)timespec_to_ns(&delta_time); | |
421 | speed_timedelta = div64_u64(speed_timedelta, | |
422 | 1000000); /* nsec -> usec */ | |
423 | printk(KERN_INFO "TS speed %llu Kbits/sec \n", | |
424 | div64_u64(speed_bytes, | |
425 | speed_timedelta)); | |
c2c90365 | 426 | } |
26b9d6c0 AO |
427 | |
428 | demux->speed_last_time = cur_time; | |
429 | demux->speed_pkts_cnt = 0; | |
c2c90365 PST |
430 | } |
431 | } | |
26b9d6c0 | 432 | |
ae530205 MK |
433 | if (buf[1] & 0x80) { |
434 | dprintk_tscheck("TEI detected. " | |
435 | "PID=0x%x data1=0x%x\n", | |
436 | pid, buf[1]); | |
f58c91ce | 437 | /* data in this packet can't be trusted - drop it unless |
ae530205 MK |
438 | * module option dvb_demux_feed_err_pkts is set */ |
439 | if (!dvb_demux_feed_err_pkts) | |
440 | return; | |
441 | } else /* if TEI bit is set, pid may be wrong- skip pkt counter */ | |
5144f5b7 JS |
442 | if (demux->cnt_storage && dvb_demux_tscheck) { |
443 | /* check pkt counter */ | |
444 | if (pid < MAX_PID) { | |
445 | if (buf[3] & 0x10) | |
446 | demux->cnt_storage[pid] = | |
447 | (demux->cnt_storage[pid] + 1) & 0xf; | |
448 | ||
449 | if ((buf[3] & 0xf) != demux->cnt_storage[pid]) { | |
450 | dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n", | |
0d834635 AO |
451 | pid, demux->cnt_storage[pid], |
452 | buf[3] & 0xf); | |
5144f5b7 JS |
453 | demux->cnt_storage[pid] = buf[3] & 0xf; |
454 | } | |
455 | } | |
456 | /* end check */ | |
c2c90365 | 457 | } |
0d834635 | 458 | |
79482619 | 459 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
1da177e4 LT |
460 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
461 | continue; | |
462 | ||
463 | /* copy each packet only once to the dvr device, even | |
464 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
465 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
466 | continue; | |
467 | ||
a4afd658 | 468 | if (feed->pid == pid) |
1da177e4 | 469 | dvb_dmx_swfilter_packet_type(feed, buf); |
a4afd658 | 470 | else if (feed->pid == 0x2000) |
2f684b23 | 471 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts); |
1da177e4 LT |
472 | } |
473 | } | |
474 | ||
dad4a730 AO |
475 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
476 | size_t count) | |
1da177e4 | 477 | { |
503f2de7 ML |
478 | unsigned long flags; |
479 | ||
480 | spin_lock_irqsave(&demux->lock, flags); | |
1da177e4 LT |
481 | |
482 | while (count--) { | |
dad4a730 AO |
483 | if (buf[0] == 0x47) |
484 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
485 | buf += 188; |
486 | } | |
487 | ||
503f2de7 | 488 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 489 | } |
1da177e4 | 490 | |
dad4a730 | 491 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 | 492 | |
38e009aa MR |
493 | static inline int find_next_packet(const u8 *buf, int pos, size_t count, |
494 | const int pktsize) | |
1da177e4 | 495 | { |
38e009aa | 496 | int start = pos, lost; |
1da177e4 | 497 | |
38e009aa MR |
498 | while (pos < count) { |
499 | if (buf[pos] == 0x47 || | |
500 | (pktsize == 204 && buf[pos] == 0xB8)) | |
501 | break; | |
502 | pos++; | |
1da177e4 LT |
503 | } |
504 | ||
38e009aa MR |
505 | lost = pos - start; |
506 | if (lost) { | |
507 | /* This garbage is part of a valid packet? */ | |
508 | int backtrack = pos - pktsize; | |
509 | if (backtrack >= 0 && (buf[backtrack] == 0x47 || | |
510 | (pktsize == 204 && buf[backtrack] == 0xB8))) | |
511 | return backtrack; | |
1da177e4 LT |
512 | } |
513 | ||
38e009aa | 514 | return pos; |
1da177e4 | 515 | } |
dad4a730 | 516 | |
38e009aa MR |
517 | /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */ |
518 | static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, | |
519 | size_t count, const int pktsize) | |
1da177e4 | 520 | { |
dad4a730 | 521 | int p = 0, i, j; |
38e009aa | 522 | const u8 *q; |
503f2de7 | 523 | unsigned long flags; |
dad4a730 | 524 | |
503f2de7 | 525 | spin_lock_irqsave(&demux->lock, flags); |
1da177e4 | 526 | |
38e009aa | 527 | if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */ |
dad4a730 | 528 | i = demux->tsbufp; |
38e009aa | 529 | j = pktsize - i; |
dad4a730 | 530 | if (count < j) { |
1da177e4 LT |
531 | memcpy(&demux->tsbuf[i], buf, count); |
532 | demux->tsbufp += count; | |
533 | goto bailout; | |
534 | } | |
535 | memcpy(&demux->tsbuf[i], buf, j); | |
38e009aa MR |
536 | if (demux->tsbuf[0] == 0x47) /* double check */ |
537 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
1da177e4 LT |
538 | demux->tsbufp = 0; |
539 | p += j; | |
540 | } | |
541 | ||
38e009aa MR |
542 | while (1) { |
543 | p = find_next_packet(buf, p, count, pktsize); | |
544 | if (p >= count) | |
545 | break; | |
546 | if (count - p < pktsize) | |
547 | break; | |
548 | ||
549 | q = &buf[p]; | |
550 | ||
551 | if (pktsize == 204 && (*q == 0xB8)) { | |
552 | memcpy(demux->tsbuf, q, 188); | |
553 | demux->tsbuf[0] = 0x47; | |
554 | q = demux->tsbuf; | |
1da177e4 | 555 | } |
38e009aa MR |
556 | dvb_dmx_swfilter_packet(demux, q); |
557 | p += pktsize; | |
558 | } | |
559 | ||
560 | i = count - p; | |
561 | if (i) { | |
562 | memcpy(demux->tsbuf, &buf[p], i); | |
563 | demux->tsbufp = i; | |
564 | if (pktsize == 204 && demux->tsbuf[0] == 0xB8) | |
565 | demux->tsbuf[0] = 0x47; | |
1da177e4 LT |
566 | } |
567 | ||
568 | bailout: | |
503f2de7 | 569 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 570 | } |
1da177e4 | 571 | |
38e009aa MR |
572 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) |
573 | { | |
574 | _dvb_dmx_swfilter(demux, buf, count, 188); | |
575 | } | |
576 | EXPORT_SYMBOL(dvb_dmx_swfilter); | |
577 | ||
578 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
579 | { | |
580 | _dvb_dmx_swfilter(demux, buf, count, 204); | |
581 | } | |
dad4a730 | 582 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 583 | |
8e156702 MK |
584 | void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count) |
585 | { | |
503f2de7 ML |
586 | unsigned long flags; |
587 | ||
588 | spin_lock_irqsave(&demux->lock, flags); | |
8e156702 | 589 | |
2f684b23 | 590 | demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts); |
8e156702 | 591 | |
503f2de7 | 592 | spin_unlock_irqrestore(&demux->lock, flags); |
8e156702 MK |
593 | } |
594 | EXPORT_SYMBOL(dvb_dmx_swfilter_raw); | |
595 | ||
dad4a730 | 596 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
597 | { |
598 | int i; | |
599 | ||
dad4a730 | 600 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
601 | if (demux->filter[i].state == DMX_STATE_FREE) |
602 | break; | |
603 | ||
604 | if (i == demux->filternum) | |
605 | return NULL; | |
606 | ||
607 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
608 | ||
609 | return &demux->filter[i]; | |
610 | } | |
611 | ||
dad4a730 | 612 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
613 | { |
614 | int i; | |
615 | ||
dad4a730 | 616 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
617 | if (demux->feed[i].state == DMX_STATE_FREE) |
618 | break; | |
619 | ||
620 | if (i == demux->feednum) | |
621 | return NULL; | |
622 | ||
623 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
624 | ||
625 | return &demux->feed[i]; | |
626 | } | |
627 | ||
628 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
629 | { | |
630 | struct dvb_demux_feed *entry; | |
631 | ||
632 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
633 | if (entry == feed) | |
634 | return 1; | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
640 | { | |
641 | spin_lock_irq(&feed->demux->lock); | |
642 | if (dvb_demux_feed_find(feed)) { | |
643 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 644 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
645 | goto out; |
646 | } | |
647 | ||
648 | list_add(&feed->list_head, &feed->demux->feed_list); | |
649 | out: | |
650 | spin_unlock_irq(&feed->demux->lock); | |
651 | } | |
652 | ||
653 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
654 | { | |
655 | spin_lock_irq(&feed->demux->lock); | |
656 | if (!(dvb_demux_feed_find(feed))) { | |
657 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 658 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
659 | goto out; |
660 | } | |
661 | ||
662 | list_del(&feed->list_head); | |
663 | out: | |
664 | spin_unlock_irq(&feed->demux->lock); | |
665 | } | |
666 | ||
dad4a730 AO |
667 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
668 | enum dmx_ts_pes pes_type, | |
669 | size_t circular_buffer_size, struct timespec timeout) | |
1da177e4 | 670 | { |
dad4a730 | 671 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
672 | struct dvb_demux *demux = feed->demux; |
673 | ||
674 | if (pid > DMX_MAX_PID) | |
675 | return -EINVAL; | |
676 | ||
3593cab5 | 677 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
678 | return -ERESTARTSYS; |
679 | ||
680 | if (ts_type & TS_DECODER) { | |
fde04ab9 | 681 | if (pes_type >= DMX_PES_OTHER) { |
3593cab5 | 682 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
683 | return -EINVAL; |
684 | } | |
685 | ||
686 | if (demux->pesfilter[pes_type] && | |
687 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 688 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
689 | return -EINVAL; |
690 | } | |
691 | ||
692 | demux->pesfilter[pes_type] = feed; | |
693 | demux->pids[pes_type] = pid; | |
694 | } | |
695 | ||
696 | dvb_demux_feed_add(feed); | |
697 | ||
698 | feed->pid = pid; | |
699 | feed->buffer_size = circular_buffer_size; | |
1da177e4 | 700 | feed->timeout = timeout; |
1da177e4 LT |
701 | feed->ts_type = ts_type; |
702 | feed->pes_type = pes_type; | |
703 | ||
1da177e4 LT |
704 | if (feed->buffer_size) { |
705 | #ifdef NOBUFS | |
dad4a730 | 706 | feed->buffer = NULL; |
1da177e4 LT |
707 | #else |
708 | feed->buffer = vmalloc(feed->buffer_size); | |
709 | if (!feed->buffer) { | |
3593cab5 | 710 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
711 | return -ENOMEM; |
712 | } | |
713 | #endif | |
714 | } | |
715 | ||
716 | feed->state = DMX_STATE_READY; | |
3593cab5 | 717 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
718 | |
719 | return 0; | |
720 | } | |
721 | ||
dad4a730 | 722 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 723 | { |
dad4a730 | 724 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
725 | struct dvb_demux *demux = feed->demux; |
726 | int ret; | |
727 | ||
3593cab5 | 728 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
729 | return -ERESTARTSYS; |
730 | ||
731 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 732 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
733 | return -EINVAL; |
734 | } | |
735 | ||
736 | if (!demux->start_feed) { | |
3593cab5 | 737 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
738 | return -ENODEV; |
739 | } | |
740 | ||
741 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 742 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
743 | return ret; |
744 | } | |
745 | ||
746 | spin_lock_irq(&demux->lock); | |
747 | ts_feed->is_filtering = 1; | |
748 | feed->state = DMX_STATE_GO; | |
749 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 750 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
751 | |
752 | return 0; | |
753 | } | |
754 | ||
dad4a730 | 755 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 756 | { |
dad4a730 | 757 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
758 | struct dvb_demux *demux = feed->demux; |
759 | int ret; | |
760 | ||
c2788502 | 761 | mutex_lock(&demux->mutex); |
1da177e4 LT |
762 | |
763 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 764 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
765 | return -EINVAL; |
766 | } | |
767 | ||
768 | if (!demux->stop_feed) { | |
3593cab5 | 769 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
770 | return -ENODEV; |
771 | } | |
772 | ||
773 | ret = demux->stop_feed(feed); | |
774 | ||
775 | spin_lock_irq(&demux->lock); | |
776 | ts_feed->is_filtering = 0; | |
777 | feed->state = DMX_STATE_ALLOCATED; | |
778 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 779 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
780 | |
781 | return ret; | |
782 | } | |
783 | ||
dad4a730 AO |
784 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
785 | struct dmx_ts_feed **ts_feed, | |
786 | dmx_ts_cb callback) | |
1da177e4 | 787 | { |
dad4a730 | 788 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
789 | struct dvb_demux_feed *feed; |
790 | ||
3593cab5 | 791 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
792 | return -ERESTARTSYS; |
793 | ||
794 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 795 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
796 | return -EBUSY; |
797 | } | |
798 | ||
799 | feed->type = DMX_TYPE_TS; | |
800 | feed->cb.ts = callback; | |
801 | feed->demux = demux; | |
802 | feed->pid = 0xffff; | |
803 | feed->peslen = 0xfffa; | |
804 | feed->buffer = NULL; | |
805 | ||
806 | (*ts_feed) = &feed->feed.ts; | |
807 | (*ts_feed)->parent = dmx; | |
808 | (*ts_feed)->priv = NULL; | |
809 | (*ts_feed)->is_filtering = 0; | |
810 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
811 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
812 | (*ts_feed)->set = dmx_ts_feed_set; | |
813 | ||
1da177e4 LT |
814 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
815 | feed->state = DMX_STATE_FREE; | |
3593cab5 | 816 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
817 | return -EBUSY; |
818 | } | |
819 | ||
820 | feed->filter->type = DMX_TYPE_TS; | |
821 | feed->filter->feed = feed; | |
822 | feed->filter->state = DMX_STATE_READY; | |
823 | ||
3593cab5 | 824 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
825 | |
826 | return 0; | |
827 | } | |
828 | ||
dad4a730 AO |
829 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, |
830 | struct dmx_ts_feed *ts_feed) | |
1da177e4 | 831 | { |
dad4a730 AO |
832 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
833 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; | |
1da177e4 | 834 | |
c2788502 | 835 | mutex_lock(&demux->mutex); |
1da177e4 LT |
836 | |
837 | if (feed->state == DMX_STATE_FREE) { | |
3593cab5 | 838 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
839 | return -EINVAL; |
840 | } | |
1da177e4 LT |
841 | #ifndef NOBUFS |
842 | vfree(feed->buffer); | |
dad4a730 | 843 | feed->buffer = NULL; |
1da177e4 LT |
844 | #endif |
845 | ||
846 | feed->state = DMX_STATE_FREE; | |
847 | feed->filter->state = DMX_STATE_FREE; | |
848 | ||
849 | dvb_demux_feed_del(feed); | |
850 | ||
851 | feed->pid = 0xffff; | |
852 | ||
fde04ab9 | 853 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER) |
1da177e4 LT |
854 | demux->pesfilter[feed->pes_type] = NULL; |
855 | ||
3593cab5 | 856 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
857 | return 0; |
858 | } | |
859 | ||
1da177e4 LT |
860 | /****************************************************************************** |
861 | * dmx_section_feed API calls | |
862 | ******************************************************************************/ | |
863 | ||
dad4a730 AO |
864 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
865 | struct dmx_section_filter **filter) | |
1da177e4 | 866 | { |
dad4a730 | 867 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
868 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
869 | struct dvb_demux_filter *dvbdmxfilter; | |
870 | ||
3593cab5 | 871 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
872 | return -ERESTARTSYS; |
873 | ||
874 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
875 | if (!dvbdmxfilter) { | |
3593cab5 | 876 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
877 | return -EBUSY; |
878 | } | |
879 | ||
880 | spin_lock_irq(&dvbdemux->lock); | |
881 | *filter = &dvbdmxfilter->filter; | |
882 | (*filter)->parent = feed; | |
883 | (*filter)->priv = NULL; | |
884 | dvbdmxfilter->feed = dvbdmxfeed; | |
885 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
886 | dvbdmxfilter->state = DMX_STATE_READY; | |
887 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
888 | dvbdmxfeed->filter = dvbdmxfilter; | |
889 | spin_unlock_irq(&dvbdemux->lock); | |
890 | ||
3593cab5 | 891 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
892 | return 0; |
893 | } | |
894 | ||
dad4a730 AO |
895 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
896 | u16 pid, size_t circular_buffer_size, | |
897 | int check_crc) | |
1da177e4 | 898 | { |
dad4a730 | 899 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
900 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
901 | ||
902 | if (pid > 0x1fff) | |
903 | return -EINVAL; | |
904 | ||
3593cab5 | 905 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
906 | return -ERESTARTSYS; |
907 | ||
908 | dvb_demux_feed_add(dvbdmxfeed); | |
909 | ||
910 | dvbdmxfeed->pid = pid; | |
911 | dvbdmxfeed->buffer_size = circular_buffer_size; | |
1da177e4 LT |
912 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
913 | ||
914 | #ifdef NOBUFS | |
915 | dvbdmxfeed->buffer = NULL; | |
916 | #else | |
dad4a730 | 917 | dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size); |
1da177e4 | 918 | if (!dvbdmxfeed->buffer) { |
3593cab5 | 919 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
920 | return -ENOMEM; |
921 | } | |
922 | #endif | |
923 | ||
924 | dvbdmxfeed->state = DMX_STATE_READY; | |
3593cab5 | 925 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
926 | return 0; |
927 | } | |
928 | ||
1da177e4 LT |
929 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
930 | { | |
931 | int i; | |
932 | struct dvb_demux_filter *f; | |
933 | struct dmx_section_filter *sf; | |
934 | u8 mask, mode, doneq; | |
935 | ||
dad4a730 | 936 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
937 | return; |
938 | do { | |
939 | sf = &f->filter; | |
940 | doneq = 0; | |
dad4a730 | 941 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
942 | mode = sf->filter_mode[i]; |
943 | mask = sf->filter_mask[i]; | |
944 | f->maskandmode[i] = mask & mode; | |
945 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
946 | } | |
947 | f->doneq = doneq ? 1 : 0; | |
948 | } while ((f = f->next)); | |
949 | } | |
950 | ||
1da177e4 LT |
951 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
952 | { | |
dad4a730 | 953 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
954 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
955 | int ret; | |
956 | ||
3593cab5 | 957 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
958 | return -ERESTARTSYS; |
959 | ||
960 | if (feed->is_filtering) { | |
3593cab5 | 961 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
962 | return -EBUSY; |
963 | } | |
964 | ||
965 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 966 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
967 | return -EINVAL; |
968 | } | |
969 | ||
970 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
971 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
972 | dvbdmxfeed->feed.sec.secbufp = 0; | |
973 | dvbdmxfeed->feed.sec.seclen = 0; | |
974 | ||
975 | if (!dvbdmx->start_feed) { | |
3593cab5 | 976 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
977 | return -ENODEV; |
978 | } | |
979 | ||
980 | prepare_secfilters(dvbdmxfeed); | |
981 | ||
982 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 983 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
984 | return ret; |
985 | } | |
986 | ||
987 | spin_lock_irq(&dvbdmx->lock); | |
988 | feed->is_filtering = 1; | |
989 | dvbdmxfeed->state = DMX_STATE_GO; | |
990 | spin_unlock_irq(&dvbdmx->lock); | |
991 | ||
3593cab5 | 992 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
993 | return 0; |
994 | } | |
995 | ||
dad4a730 | 996 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 997 | { |
dad4a730 | 998 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
999 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
1000 | int ret; | |
1001 | ||
c2788502 | 1002 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
1003 | |
1004 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 1005 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1006 | return -ENODEV; |
1007 | } | |
1008 | ||
1009 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
1010 | ||
1011 | spin_lock_irq(&dvbdmx->lock); | |
1012 | dvbdmxfeed->state = DMX_STATE_READY; | |
1013 | feed->is_filtering = 0; | |
1014 | spin_unlock_irq(&dvbdmx->lock); | |
1015 | ||
3593cab5 | 1016 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1017 | return ret; |
1018 | } | |
1019 | ||
1da177e4 | 1020 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 1021 | struct dmx_section_filter *filter) |
1da177e4 | 1022 | { |
dad4a730 AO |
1023 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
1024 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
1025 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
1026 | ||
c2788502 | 1027 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
1028 | |
1029 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 1030 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1031 | return -EINVAL; |
1032 | } | |
1033 | ||
6633327d | 1034 | if (feed->is_filtering) { |
340f70e9 MK |
1035 | /* release dvbdmx->mutex as far as it is |
1036 | acquired by stop_filtering() itself */ | |
6633327d | 1037 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 | 1038 | feed->stop_filtering(feed); |
6633327d AK |
1039 | mutex_lock(&dvbdmx->mutex); |
1040 | } | |
1da177e4 LT |
1041 | |
1042 | spin_lock_irq(&dvbdmx->lock); | |
1043 | f = dvbdmxfeed->filter; | |
1044 | ||
1045 | if (f == dvbdmxfilter) { | |
1046 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
1047 | } else { | |
dad4a730 | 1048 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
1049 | f = f->next; |
1050 | f->next = f->next->next; | |
1051 | } | |
1052 | ||
1053 | dvbdmxfilter->state = DMX_STATE_FREE; | |
1054 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 1055 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1056 | return 0; |
1057 | } | |
1058 | ||
1059 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
1060 | struct dmx_section_feed **feed, | |
1061 | dmx_section_cb callback) | |
1062 | { | |
dad4a730 | 1063 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
1064 | struct dvb_demux_feed *dvbdmxfeed; |
1065 | ||
3593cab5 | 1066 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
1067 | return -ERESTARTSYS; |
1068 | ||
1069 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 1070 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1071 | return -EBUSY; |
1072 | } | |
1073 | ||
1074 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
1075 | dvbdmxfeed->cb.sec = callback; | |
1076 | dvbdmxfeed->demux = dvbdmx; | |
1077 | dvbdmxfeed->pid = 0xffff; | |
1078 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
1079 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
1080 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
1081 | dvbdmxfeed->filter = NULL; | |
1082 | dvbdmxfeed->buffer = NULL; | |
1083 | ||
dad4a730 | 1084 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
1085 | (*feed)->is_filtering = 0; |
1086 | (*feed)->parent = demux; | |
1087 | (*feed)->priv = NULL; | |
1088 | ||
1089 | (*feed)->set = dmx_section_feed_set; | |
1090 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1091 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1092 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1093 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1094 | ||
3593cab5 | 1095 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1096 | return 0; |
1097 | } | |
1098 | ||
1099 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1100 | struct dmx_section_feed *feed) | |
1101 | { | |
dad4a730 AO |
1102 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1103 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1104 | |
c2788502 | 1105 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1106 | |
dad4a730 | 1107 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1108 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1109 | return -EINVAL; |
1110 | } | |
1111 | #ifndef NOBUFS | |
1112 | vfree(dvbdmxfeed->buffer); | |
dad4a730 | 1113 | dvbdmxfeed->buffer = NULL; |
1da177e4 | 1114 | #endif |
dad4a730 | 1115 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1116 | |
1117 | dvb_demux_feed_del(dvbdmxfeed); | |
1118 | ||
1119 | dvbdmxfeed->pid = 0xffff; | |
1120 | ||
3593cab5 | 1121 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1122 | return 0; |
1123 | } | |
1124 | ||
1da177e4 LT |
1125 | /****************************************************************************** |
1126 | * dvb_demux kernel data API calls | |
1127 | ******************************************************************************/ | |
1128 | ||
1129 | static int dvbdmx_open(struct dmx_demux *demux) | |
1130 | { | |
dad4a730 | 1131 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1132 | |
1133 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1134 | return -EUSERS; | |
1135 | ||
1136 | dvbdemux->users++; | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1da177e4 LT |
1140 | static int dvbdmx_close(struct dmx_demux *demux) |
1141 | { | |
dad4a730 | 1142 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1143 | |
1144 | if (dvbdemux->users == 0) | |
1145 | return -ENODEV; | |
1146 | ||
1147 | dvbdemux->users--; | |
1148 | //FIXME: release any unneeded resources if users==0 | |
1149 | return 0; | |
1150 | } | |
1151 | ||
947a0800 | 1152 | static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) |
1da177e4 | 1153 | { |
dad4a730 | 1154 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
947a0800 | 1155 | void *p; |
1da177e4 LT |
1156 | |
1157 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1158 | return -EINVAL; | |
1159 | ||
c6cfe055 JL |
1160 | p = memdup_user(buf, count); |
1161 | if (IS_ERR(p)) | |
1162 | return PTR_ERR(p); | |
947a0800 AV |
1163 | if (mutex_lock_interruptible(&dvbdemux->mutex)) { |
1164 | kfree(p); | |
1da177e4 | 1165 | return -ERESTARTSYS; |
947a0800 AV |
1166 | } |
1167 | dvb_dmx_swfilter(dvbdemux, p, count); | |
1168 | kfree(p); | |
3593cab5 | 1169 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1170 | |
1171 | if (signal_pending(current)) | |
1172 | return -EINTR; | |
1173 | return count; | |
1174 | } | |
1175 | ||
dad4a730 AO |
1176 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1177 | struct dmx_frontend *frontend) | |
1da177e4 | 1178 | { |
dad4a730 | 1179 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1180 | struct list_head *head = &dvbdemux->frontend_list; |
1181 | ||
1182 | list_add(&(frontend->connectivity_list), head); | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
dad4a730 AO |
1187 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1188 | struct dmx_frontend *frontend) | |
1da177e4 | 1189 | { |
dad4a730 | 1190 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1191 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1192 | ||
dad4a730 | 1193 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1194 | if (DMX_FE_ENTRY(pos) == frontend) { |
1195 | list_del(pos); | |
1196 | return 0; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | return -ENODEV; | |
1201 | } | |
1202 | ||
dad4a730 | 1203 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1204 | { |
dad4a730 | 1205 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1206 | |
1207 | if (list_empty(&dvbdemux->frontend_list)) | |
1208 | return NULL; | |
dad4a730 | 1209 | |
1da177e4 LT |
1210 | return &dvbdemux->frontend_list; |
1211 | } | |
1212 | ||
dad4a730 AO |
1213 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1214 | struct dmx_frontend *frontend) | |
1da177e4 | 1215 | { |
dad4a730 | 1216 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1217 | |
1218 | if (demux->frontend) | |
1219 | return -EINVAL; | |
1220 | ||
c2788502 | 1221 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1222 | |
1223 | demux->frontend = frontend; | |
3593cab5 | 1224 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1225 | return 0; |
1226 | } | |
1227 | ||
1da177e4 LT |
1228 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1229 | { | |
dad4a730 | 1230 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1231 | |
c2788502 | 1232 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1233 | |
1234 | demux->frontend = NULL; | |
3593cab5 | 1235 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1236 | return 0; |
1237 | } | |
1238 | ||
dad4a730 | 1239 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1240 | { |
dad4a730 | 1241 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1242 | |
dad4a730 | 1243 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1244 | return 0; |
1245 | } | |
1246 | ||
1da177e4 LT |
1247 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1248 | { | |
93653467 | 1249 | int i; |
1da177e4 LT |
1250 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1251 | ||
0d834635 | 1252 | dvbdemux->cnt_storage = NULL; |
1da177e4 | 1253 | dvbdemux->users = 0; |
dad4a730 | 1254 | dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); |
1da177e4 LT |
1255 | |
1256 | if (!dvbdemux->filter) | |
1257 | return -ENOMEM; | |
1258 | ||
dad4a730 | 1259 | dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); |
1da177e4 LT |
1260 | if (!dvbdemux->feed) { |
1261 | vfree(dvbdemux->filter); | |
adefdcee | 1262 | dvbdemux->filter = NULL; |
1da177e4 LT |
1263 | return -ENOMEM; |
1264 | } | |
dad4a730 | 1265 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1266 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1267 | dvbdemux->filter[i].index = i; | |
1268 | } | |
dad4a730 | 1269 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1270 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1271 | dvbdemux->feed[i].index = i; | |
1272 | } | |
db574d7d | 1273 | |
ab6a21f3 AO |
1274 | dvbdemux->cnt_storage = vmalloc(MAX_PID + 1); |
1275 | if (!dvbdemux->cnt_storage) | |
1276 | printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n"); | |
bc081cc8 | 1277 | |
db574d7d AO |
1278 | INIT_LIST_HEAD(&dvbdemux->frontend_list); |
1279 | ||
fde04ab9 | 1280 | for (i = 0; i < DMX_PES_OTHER; i++) { |
1da177e4 LT |
1281 | dvbdemux->pesfilter[i] = NULL; |
1282 | dvbdemux->pids[i] = 0xffff; | |
1283 | } | |
1284 | ||
1285 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1286 | ||
1287 | dvbdemux->playing = 0; | |
1288 | dvbdemux->recording = 0; | |
1289 | dvbdemux->tsbufp = 0; | |
1290 | ||
1291 | if (!dvbdemux->check_crc32) | |
1292 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1293 | ||
dad4a730 AO |
1294 | if (!dvbdemux->memcopy) |
1295 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1296 | |
1297 | dmx->frontend = NULL; | |
dad4a730 | 1298 | dmx->priv = dvbdemux; |
1da177e4 LT |
1299 | dmx->open = dvbdmx_open; |
1300 | dmx->close = dvbdmx_close; | |
1301 | dmx->write = dvbdmx_write; | |
1302 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1303 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1304 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1305 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1306 | ||
1da177e4 LT |
1307 | dmx->add_frontend = dvbdmx_add_frontend; |
1308 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1309 | dmx->get_frontends = dvbdmx_get_frontends; | |
1310 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1311 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1312 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1313 | ||
3593cab5 | 1314 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1315 | spin_lock_init(&dvbdemux->lock); |
1316 | ||
1da177e4 LT |
1317 | return 0; |
1318 | } | |
1da177e4 | 1319 | |
dad4a730 | 1320 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1321 | |
93653467 | 1322 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1323 | { |
0d834635 | 1324 | vfree(dvbdemux->cnt_storage); |
1da177e4 LT |
1325 | vfree(dvbdemux->filter); |
1326 | vfree(dvbdemux->feed); | |
1da177e4 | 1327 | } |
dad4a730 | 1328 | |
1da177e4 | 1329 | EXPORT_SYMBOL(dvb_dmx_release); |