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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 | ||
0d834635 AO |
53 | #define dprintk_tscheck(x...) do { \ |
54 | if (dvb_demux_tscheck && printk_ratelimit()) \ | |
55 | printk(x); \ | |
56 | } while (0) | |
57 | ||
1da177e4 LT |
58 | /****************************************************************************** |
59 | * static inlined helper functions | |
60 | ******************************************************************************/ | |
61 | ||
1da177e4 LT |
62 | static inline u16 section_length(const u8 *buf) |
63 | { | |
dad4a730 | 64 | return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 LT |
67 | static inline u16 ts_pid(const u8 *buf) |
68 | { | |
dad4a730 | 69 | return ((buf[1] & 0x1f) << 8) + buf[2]; |
1da177e4 LT |
70 | } |
71 | ||
1da177e4 LT |
72 | static inline u8 payload(const u8 *tsp) |
73 | { | |
dad4a730 | 74 | if (!(tsp[3] & 0x10)) // no payload? |
1da177e4 | 75 | return 0; |
dad4a730 AO |
76 | |
77 | if (tsp[3] & 0x20) { // adaptation field? | |
78 | if (tsp[4] > 183) // corrupted data? | |
1da177e4 LT |
79 | return 0; |
80 | else | |
dad4a730 | 81 | return 184 - 1 - tsp[4]; |
1da177e4 | 82 | } |
dad4a730 | 83 | |
1da177e4 LT |
84 | return 184; |
85 | } | |
86 | ||
dad4a730 | 87 | static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) |
1da177e4 | 88 | { |
dad4a730 | 89 | return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); |
1da177e4 LT |
90 | } |
91 | ||
dad4a730 AO |
92 | static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, |
93 | size_t len) | |
1da177e4 | 94 | { |
dad4a730 | 95 | memcpy(d, s, len); |
1da177e4 LT |
96 | } |
97 | ||
1da177e4 LT |
98 | /****************************************************************************** |
99 | * Software filter functions | |
100 | ******************************************************************************/ | |
101 | ||
dad4a730 AO |
102 | static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, |
103 | const u8 *buf) | |
1da177e4 LT |
104 | { |
105 | int count = payload(buf); | |
106 | int p; | |
107 | //int ccok; | |
108 | //u8 cc; | |
109 | ||
110 | if (count == 0) | |
111 | return -1; | |
112 | ||
dad4a730 | 113 | p = 188 - count; |
1da177e4 LT |
114 | |
115 | /* | |
dad4a730 AO |
116 | cc = buf[3] & 0x0f; |
117 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
118 | feed->cc = cc; | |
1da177e4 LT |
119 | if (!ccok) |
120 | printk("missed packet!\n"); | |
121 | */ | |
122 | ||
dad4a730 | 123 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
124 | feed->peslen = 0xfffa; |
125 | ||
126 | feed->peslen += count; | |
127 | ||
dad4a730 | 128 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); |
1da177e4 LT |
129 | } |
130 | ||
dad4a730 AO |
131 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
132 | struct dvb_demux_filter *f) | |
1da177e4 LT |
133 | { |
134 | u8 neq = 0; | |
135 | int i; | |
136 | ||
dad4a730 | 137 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
138 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
139 | ||
140 | if (f->maskandmode[i] & xor) | |
141 | return 0; | |
142 | ||
143 | neq |= f->maskandnotmode[i] & xor; | |
144 | } | |
145 | ||
146 | if (f->doneq && !neq) | |
147 | return 0; | |
148 | ||
dad4a730 AO |
149 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
150 | NULL, 0, &f->filter, DMX_OK); | |
1da177e4 LT |
151 | } |
152 | ||
dad4a730 | 153 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
154 | { |
155 | struct dvb_demux *demux = feed->demux; | |
156 | struct dvb_demux_filter *f = feed->filter; | |
157 | struct dmx_section_feed *sec = &feed->feed.sec; | |
158 | int section_syntax_indicator; | |
159 | ||
160 | if (!sec->is_filtering) | |
161 | return 0; | |
162 | ||
163 | if (!f) | |
164 | return 0; | |
165 | ||
166 | if (sec->check_crc) { | |
167 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
168 | if (section_syntax_indicator && | |
169 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
170 | return -1; | |
171 | } | |
172 | ||
173 | do { | |
174 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
175 | return -1; | |
176 | } while ((f = f->next) && sec->is_filtering); | |
177 | ||
178 | sec->seclen = 0; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
1da177e4 LT |
183 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
184 | { | |
185 | struct dmx_section_feed *sec = &feed->feed.sec; | |
186 | ||
187 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 | 188 | if (sec->secbufp < sec->tsfeedp) { |
1da177e4 LT |
189 | int i, n = sec->tsfeedp - sec->secbufp; |
190 | ||
dad4a730 AO |
191 | /* |
192 | * Section padding is done with 0xff bytes entirely. | |
193 | * Due to speed reasons, we won't check all of them | |
194 | * but just first and last. | |
195 | */ | |
196 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
1da177e4 LT |
197 | printk("dvb_demux.c section ts padding loss: %d/%d\n", |
198 | n, sec->tsfeedp); | |
199 | printk("dvb_demux.c pad data:"); | |
dad4a730 | 200 | for (i = 0; i < n; i++) |
1da177e4 LT |
201 | printk(" %02x", sec->secbuf[i]); |
202 | printk("\n"); | |
203 | } | |
204 | } | |
205 | #endif | |
206 | ||
207 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
208 | sec->secbuf = sec->secbuf_base; | |
209 | } | |
210 | ||
211 | /* | |
dad4a730 AO |
212 | * Losless Section Demux 1.4.1 by Emard |
213 | * Valsecchi Patrick: | |
214 | * - middle of section A (no PUSI) | |
215 | * - end of section A and start of section B | |
216 | * (with PUSI pointing to the start of the second section) | |
217 | * | |
218 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
219 | * consisting of the end of section A. Basically because tsfeedp | |
220 | * is incemented and the use=0 condition is not raised | |
221 | * when the second packet arrives. | |
222 | * | |
223 | * Fix: | |
224 | * when demux is started, let feed->pusi_seen = 0 to | |
225 | * prevent initial feeding of garbage from the end of | |
226 | * previous section. When you for the first time see PUSI=1 | |
227 | * then set feed->pusi_seen = 1 | |
228 | */ | |
229 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
230 | const u8 *buf, u8 len) | |
1da177e4 LT |
231 | { |
232 | struct dvb_demux *demux = feed->demux; | |
233 | struct dmx_section_feed *sec = &feed->feed.sec; | |
234 | u16 limit, seclen, n; | |
235 | ||
dad4a730 | 236 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
237 | return 0; |
238 | ||
dad4a730 | 239 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
1da177e4 LT |
240 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
241 | printk("dvb_demux.c section buffer full loss: %d/%d\n", | |
dad4a730 AO |
242 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, |
243 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
244 | #endif |
245 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
246 | } | |
247 | ||
dad4a730 | 248 | if (len <= 0) |
1da177e4 LT |
249 | return 0; |
250 | ||
251 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
252 | sec->tsfeedp += len; | |
253 | ||
dad4a730 AO |
254 | /* |
255 | * Dump all the sections we can find in the data (Emard) | |
256 | */ | |
1da177e4 | 257 | limit = sec->tsfeedp; |
dad4a730 AO |
258 | if (limit > DMX_MAX_SECFEED_SIZE) |
259 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
260 | |
261 | /* to be sure always set secbuf */ | |
262 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
263 | ||
dad4a730 | 264 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 265 | seclen = section_length(sec->secbuf); |
b3967d6c | 266 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 267 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
268 | return 0; |
269 | sec->seclen = seclen; | |
270 | sec->crc_val = ~0; | |
271 | /* dump [secbuf .. secbuf+seclen) */ | |
dad4a730 | 272 | if (feed->pusi_seen) |
1da177e4 LT |
273 | dvb_dmx_swfilter_section_feed(feed); |
274 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
275 | else | |
276 | printk("dvb_demux.c pusi not seen, discarding section data\n"); | |
277 | #endif | |
dad4a730 AO |
278 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
279 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
280 | } |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
dad4a730 AO |
285 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
286 | const u8 *buf) | |
1da177e4 LT |
287 | { |
288 | u8 p, count; | |
289 | int ccok, dc_i = 0; | |
290 | u8 cc; | |
291 | ||
292 | count = payload(buf); | |
293 | ||
dad4a730 | 294 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
295 | return -1; |
296 | ||
dad4a730 | 297 | p = 188 - count; /* payload start */ |
1da177e4 LT |
298 | |
299 | cc = buf[3] & 0x0f; | |
300 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
301 | feed->cc = cc; | |
302 | ||
303 | if (buf[3] & 0x20) { | |
304 | /* adaption field present, check for discontinuity_indicator */ | |
305 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
306 | dc_i = 1; | |
307 | } | |
308 | ||
309 | if (!ccok || dc_i) { | |
310 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
311 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", |
312 | count); | |
313 | /* | |
314 | * those bytes under sume circumstances will again be reported | |
315 | * in the following dvb_dmx_swfilter_section_new | |
316 | */ | |
1da177e4 | 317 | #endif |
dad4a730 AO |
318 | /* |
319 | * Discontinuity detected. Reset pusi_seen = 0 to | |
320 | * stop feeding of suspicious data until next PUSI=1 arrives | |
321 | */ | |
1da177e4 LT |
322 | feed->pusi_seen = 0; |
323 | dvb_dmx_swfilter_section_new(feed); | |
1da177e4 LT |
324 | } |
325 | ||
326 | if (buf[1] & 0x40) { | |
dad4a730 | 327 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 328 | if (count > 1 && buf[p] < count) { |
dad4a730 | 329 | const u8 *before = &buf[p + 1]; |
1da177e4 | 330 | u8 before_len = buf[p]; |
dad4a730 AO |
331 | const u8 *after = &before[before_len]; |
332 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 333 | |
dad4a730 AO |
334 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
335 | before_len); | |
1da177e4 LT |
336 | /* before start of new section, set pusi_seen = 1 */ |
337 | feed->pusi_seen = 1; | |
338 | dvb_dmx_swfilter_section_new(feed); | |
dad4a730 AO |
339 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
340 | after_len); | |
1da177e4 LT |
341 | } |
342 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
343 | else if (count > 0) |
344 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); | |
1da177e4 LT |
345 | #endif |
346 | } else { | |
dad4a730 AO |
347 | /* PUSI=0 (is not set), no section boundary */ |
348 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 349 | } |
dad4a730 | 350 | |
1da177e4 LT |
351 | return 0; |
352 | } | |
353 | ||
dad4a730 AO |
354 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
355 | const u8 *buf) | |
1da177e4 | 356 | { |
dad4a730 | 357 | switch (feed->type) { |
1da177e4 LT |
358 | case DMX_TYPE_TS: |
359 | if (!feed->feed.ts.is_filtering) | |
360 | break; | |
361 | if (feed->ts_type & TS_PACKET) { | |
362 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
363 | dvb_dmx_swfilter_payload(feed, buf); | |
364 | else | |
dad4a730 AO |
365 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, |
366 | DMX_OK); | |
1da177e4 LT |
367 | } |
368 | if (feed->ts_type & TS_DECODER) | |
369 | if (feed->demux->write_to_decoder) | |
370 | feed->demux->write_to_decoder(feed, buf, 188); | |
371 | break; | |
372 | ||
373 | case DMX_TYPE_SEC: | |
374 | if (!feed->feed.sec.is_filtering) | |
375 | break; | |
376 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 377 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
378 | break; |
379 | ||
380 | default: | |
381 | break; | |
382 | } | |
383 | } | |
384 | ||
385 | #define DVR_FEED(f) \ | |
386 | (((f)->type == DMX_TYPE_TS) && \ | |
387 | ((f)->feed.ts.is_filtering) && \ | |
4a24ce3a | 388 | (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) |
1da177e4 LT |
389 | |
390 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
391 | { | |
392 | struct dvb_demux_feed *feed; | |
1da177e4 LT |
393 | u16 pid = ts_pid(buf); |
394 | int dvr_done = 0; | |
395 | ||
26b9d6c0 AO |
396 | if (dvb_demux_speedcheck) { |
397 | struct timespec cur_time, delta_time; | |
398 | u64 speed_bytes, speed_timedelta; | |
399 | ||
400 | demux->speed_pkts_cnt++; | |
401 | ||
402 | /* show speed every SPEED_PKTS_INTERVAL packets */ | |
403 | if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) { | |
404 | cur_time = current_kernel_time(); | |
405 | ||
406 | if (demux->speed_last_time.tv_sec != 0 && | |
407 | demux->speed_last_time.tv_nsec != 0) { | |
408 | delta_time = timespec_sub(cur_time, | |
409 | demux->speed_last_time); | |
410 | speed_bytes = (u64)demux->speed_pkts_cnt | |
411 | * 188 * 8; | |
412 | /* convert to 1024 basis */ | |
413 | speed_bytes = 1000 * div64_u64(speed_bytes, | |
414 | 1024); | |
415 | speed_timedelta = | |
416 | (u64)timespec_to_ns(&delta_time); | |
417 | speed_timedelta = div64_u64(speed_timedelta, | |
418 | 1000000); /* nsec -> usec */ | |
419 | printk(KERN_INFO "TS speed %llu Kbits/sec \n", | |
420 | div64_u64(speed_bytes, | |
421 | speed_timedelta)); | |
422 | }; | |
423 | ||
424 | demux->speed_last_time = cur_time; | |
425 | demux->speed_pkts_cnt = 0; | |
426 | }; | |
427 | }; | |
428 | ||
bc081cc8 | 429 | if (demux->cnt_storage) { |
0d834635 AO |
430 | /* check pkt counter */ |
431 | if (pid < MAX_PID) { | |
432 | if (buf[1] & 0x80) | |
433 | dprintk_tscheck("TEI detected. " | |
434 | "PID=0x%x data1=0x%x\n", | |
435 | pid, buf[1]); | |
436 | ||
437 | if ((buf[3] & 0xf) != demux->cnt_storage[pid]) | |
438 | dprintk_tscheck("TS packet counter mismatch. " | |
439 | "PID=0x%x expected 0x%x " | |
440 | "got 0x%x\n", | |
441 | pid, demux->cnt_storage[pid], | |
442 | buf[3] & 0xf); | |
443 | ||
444 | demux->cnt_storage[pid] = ((buf[3] & 0xf) + 1)&0xf; | |
445 | }; | |
446 | /* end check */ | |
447 | }; | |
0d834635 | 448 | |
79482619 | 449 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
1da177e4 LT |
450 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
451 | continue; | |
452 | ||
453 | /* copy each packet only once to the dvr device, even | |
454 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
455 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
456 | continue; | |
457 | ||
a4afd658 | 458 | if (feed->pid == pid) |
1da177e4 | 459 | dvb_dmx_swfilter_packet_type(feed, buf); |
a4afd658 | 460 | else if (feed->pid == 0x2000) |
1da177e4 LT |
461 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); |
462 | } | |
463 | } | |
464 | ||
dad4a730 AO |
465 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
466 | size_t count) | |
1da177e4 | 467 | { |
28100165 | 468 | spin_lock(&demux->lock); |
1da177e4 LT |
469 | |
470 | while (count--) { | |
dad4a730 AO |
471 | if (buf[0] == 0x47) |
472 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
473 | buf += 188; |
474 | } | |
475 | ||
28100165 | 476 | spin_unlock(&demux->lock); |
1da177e4 | 477 | } |
1da177e4 | 478 | |
dad4a730 | 479 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 LT |
480 | |
481 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) | |
482 | { | |
483 | int p = 0, i, j; | |
484 | ||
28100165 | 485 | spin_lock(&demux->lock); |
1da177e4 | 486 | |
dad4a730 AO |
487 | if (demux->tsbufp) { |
488 | i = demux->tsbufp; | |
489 | j = 188 - i; | |
490 | if (count < j) { | |
1da177e4 LT |
491 | memcpy(&demux->tsbuf[i], buf, count); |
492 | demux->tsbufp += count; | |
493 | goto bailout; | |
494 | } | |
495 | memcpy(&demux->tsbuf[i], buf, j); | |
496 | if (demux->tsbuf[0] == 0x47) | |
497 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
498 | demux->tsbufp = 0; | |
499 | p += j; | |
500 | } | |
501 | ||
502 | while (p < count) { | |
503 | if (buf[p] == 0x47) { | |
dad4a730 AO |
504 | if (count - p >= 188) { |
505 | dvb_dmx_swfilter_packet(demux, &buf[p]); | |
1da177e4 LT |
506 | p += 188; |
507 | } else { | |
dad4a730 AO |
508 | i = count - p; |
509 | memcpy(demux->tsbuf, &buf[p], i); | |
510 | demux->tsbufp = i; | |
1da177e4 LT |
511 | goto bailout; |
512 | } | |
513 | } else | |
514 | p++; | |
515 | } | |
516 | ||
517 | bailout: | |
28100165 | 518 | spin_unlock(&demux->lock); |
1da177e4 | 519 | } |
dad4a730 | 520 | |
1da177e4 LT |
521 | EXPORT_SYMBOL(dvb_dmx_swfilter); |
522 | ||
523 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
524 | { | |
dad4a730 | 525 | int p = 0, i, j; |
1da177e4 | 526 | u8 tmppack[188]; |
dad4a730 | 527 | |
28100165 | 528 | spin_lock(&demux->lock); |
1da177e4 | 529 | |
dad4a730 AO |
530 | if (demux->tsbufp) { |
531 | i = demux->tsbufp; | |
532 | j = 204 - i; | |
533 | if (count < j) { | |
1da177e4 LT |
534 | memcpy(&demux->tsbuf[i], buf, count); |
535 | demux->tsbufp += count; | |
536 | goto bailout; | |
537 | } | |
538 | memcpy(&demux->tsbuf[i], buf, j); | |
ec675bce | 539 | if ((demux->tsbuf[0] == 0x47) || (demux->tsbuf[0] == 0xB8)) { |
1da177e4 | 540 | memcpy(tmppack, demux->tsbuf, 188); |
dad4a730 AO |
541 | if (tmppack[0] == 0xB8) |
542 | tmppack[0] = 0x47; | |
1da177e4 LT |
543 | dvb_dmx_swfilter_packet(demux, tmppack); |
544 | } | |
545 | demux->tsbufp = 0; | |
546 | p += j; | |
547 | } | |
548 | ||
549 | while (p < count) { | |
ec675bce | 550 | if ((buf[p] == 0x47) || (buf[p] == 0xB8)) { |
dad4a730 AO |
551 | if (count - p >= 204) { |
552 | memcpy(tmppack, &buf[p], 188); | |
553 | if (tmppack[0] == 0xB8) | |
554 | tmppack[0] = 0x47; | |
1da177e4 LT |
555 | dvb_dmx_swfilter_packet(demux, tmppack); |
556 | p += 204; | |
557 | } else { | |
dad4a730 AO |
558 | i = count - p; |
559 | memcpy(demux->tsbuf, &buf[p], i); | |
560 | demux->tsbufp = i; | |
1da177e4 LT |
561 | goto bailout; |
562 | } | |
563 | } else { | |
564 | p++; | |
565 | } | |
566 | } | |
567 | ||
568 | bailout: | |
28100165 | 569 | spin_unlock(&demux->lock); |
1da177e4 | 570 | } |
1da177e4 | 571 | |
dad4a730 | 572 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 573 | |
dad4a730 | 574 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
575 | { |
576 | int i; | |
577 | ||
dad4a730 | 578 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
579 | if (demux->filter[i].state == DMX_STATE_FREE) |
580 | break; | |
581 | ||
582 | if (i == demux->filternum) | |
583 | return NULL; | |
584 | ||
585 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
586 | ||
587 | return &demux->filter[i]; | |
588 | } | |
589 | ||
dad4a730 | 590 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
591 | { |
592 | int i; | |
593 | ||
dad4a730 | 594 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
595 | if (demux->feed[i].state == DMX_STATE_FREE) |
596 | break; | |
597 | ||
598 | if (i == demux->feednum) | |
599 | return NULL; | |
600 | ||
601 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
602 | ||
603 | return &demux->feed[i]; | |
604 | } | |
605 | ||
606 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
607 | { | |
608 | struct dvb_demux_feed *entry; | |
609 | ||
610 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
611 | if (entry == feed) | |
612 | return 1; | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
618 | { | |
619 | spin_lock_irq(&feed->demux->lock); | |
620 | if (dvb_demux_feed_find(feed)) { | |
621 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 622 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
623 | goto out; |
624 | } | |
625 | ||
626 | list_add(&feed->list_head, &feed->demux->feed_list); | |
627 | out: | |
628 | spin_unlock_irq(&feed->demux->lock); | |
629 | } | |
630 | ||
631 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
632 | { | |
633 | spin_lock_irq(&feed->demux->lock); | |
634 | if (!(dvb_demux_feed_find(feed))) { | |
635 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 636 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
637 | goto out; |
638 | } | |
639 | ||
640 | list_del(&feed->list_head); | |
641 | out: | |
642 | spin_unlock_irq(&feed->demux->lock); | |
643 | } | |
644 | ||
dad4a730 AO |
645 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
646 | enum dmx_ts_pes pes_type, | |
647 | size_t circular_buffer_size, struct timespec timeout) | |
1da177e4 | 648 | { |
dad4a730 | 649 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
650 | struct dvb_demux *demux = feed->demux; |
651 | ||
652 | if (pid > DMX_MAX_PID) | |
653 | return -EINVAL; | |
654 | ||
3593cab5 | 655 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
656 | return -ERESTARTSYS; |
657 | ||
658 | if (ts_type & TS_DECODER) { | |
659 | if (pes_type >= DMX_TS_PES_OTHER) { | |
3593cab5 | 660 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
661 | return -EINVAL; |
662 | } | |
663 | ||
664 | if (demux->pesfilter[pes_type] && | |
665 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 666 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
667 | return -EINVAL; |
668 | } | |
669 | ||
670 | demux->pesfilter[pes_type] = feed; | |
671 | demux->pids[pes_type] = pid; | |
672 | } | |
673 | ||
674 | dvb_demux_feed_add(feed); | |
675 | ||
676 | feed->pid = pid; | |
677 | feed->buffer_size = circular_buffer_size; | |
1da177e4 | 678 | feed->timeout = timeout; |
1da177e4 LT |
679 | feed->ts_type = ts_type; |
680 | feed->pes_type = pes_type; | |
681 | ||
1da177e4 LT |
682 | if (feed->buffer_size) { |
683 | #ifdef NOBUFS | |
dad4a730 | 684 | feed->buffer = NULL; |
1da177e4 LT |
685 | #else |
686 | feed->buffer = vmalloc(feed->buffer_size); | |
687 | if (!feed->buffer) { | |
3593cab5 | 688 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
689 | return -ENOMEM; |
690 | } | |
691 | #endif | |
692 | } | |
693 | ||
694 | feed->state = DMX_STATE_READY; | |
3593cab5 | 695 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
696 | |
697 | return 0; | |
698 | } | |
699 | ||
dad4a730 | 700 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 701 | { |
dad4a730 | 702 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
703 | struct dvb_demux *demux = feed->demux; |
704 | int ret; | |
705 | ||
3593cab5 | 706 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
707 | return -ERESTARTSYS; |
708 | ||
709 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 710 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
711 | return -EINVAL; |
712 | } | |
713 | ||
714 | if (!demux->start_feed) { | |
3593cab5 | 715 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
716 | return -ENODEV; |
717 | } | |
718 | ||
719 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 720 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
721 | return ret; |
722 | } | |
723 | ||
724 | spin_lock_irq(&demux->lock); | |
725 | ts_feed->is_filtering = 1; | |
726 | feed->state = DMX_STATE_GO; | |
727 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 728 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
729 | |
730 | return 0; | |
731 | } | |
732 | ||
dad4a730 | 733 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 734 | { |
dad4a730 | 735 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
736 | struct dvb_demux *demux = feed->demux; |
737 | int ret; | |
738 | ||
c2788502 | 739 | mutex_lock(&demux->mutex); |
1da177e4 LT |
740 | |
741 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 742 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
743 | return -EINVAL; |
744 | } | |
745 | ||
746 | if (!demux->stop_feed) { | |
3593cab5 | 747 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
748 | return -ENODEV; |
749 | } | |
750 | ||
751 | ret = demux->stop_feed(feed); | |
752 | ||
753 | spin_lock_irq(&demux->lock); | |
754 | ts_feed->is_filtering = 0; | |
755 | feed->state = DMX_STATE_ALLOCATED; | |
756 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 757 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
758 | |
759 | return ret; | |
760 | } | |
761 | ||
dad4a730 AO |
762 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
763 | struct dmx_ts_feed **ts_feed, | |
764 | dmx_ts_cb callback) | |
1da177e4 | 765 | { |
dad4a730 | 766 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
767 | struct dvb_demux_feed *feed; |
768 | ||
3593cab5 | 769 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
770 | return -ERESTARTSYS; |
771 | ||
772 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 773 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
774 | return -EBUSY; |
775 | } | |
776 | ||
777 | feed->type = DMX_TYPE_TS; | |
778 | feed->cb.ts = callback; | |
779 | feed->demux = demux; | |
780 | feed->pid = 0xffff; | |
781 | feed->peslen = 0xfffa; | |
782 | feed->buffer = NULL; | |
783 | ||
784 | (*ts_feed) = &feed->feed.ts; | |
785 | (*ts_feed)->parent = dmx; | |
786 | (*ts_feed)->priv = NULL; | |
787 | (*ts_feed)->is_filtering = 0; | |
788 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
789 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
790 | (*ts_feed)->set = dmx_ts_feed_set; | |
791 | ||
1da177e4 LT |
792 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
793 | feed->state = DMX_STATE_FREE; | |
3593cab5 | 794 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
795 | return -EBUSY; |
796 | } | |
797 | ||
798 | feed->filter->type = DMX_TYPE_TS; | |
799 | feed->filter->feed = feed; | |
800 | feed->filter->state = DMX_STATE_READY; | |
801 | ||
3593cab5 | 802 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
803 | |
804 | return 0; | |
805 | } | |
806 | ||
dad4a730 AO |
807 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, |
808 | struct dmx_ts_feed *ts_feed) | |
1da177e4 | 809 | { |
dad4a730 AO |
810 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
811 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; | |
1da177e4 | 812 | |
c2788502 | 813 | mutex_lock(&demux->mutex); |
1da177e4 LT |
814 | |
815 | if (feed->state == DMX_STATE_FREE) { | |
3593cab5 | 816 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
817 | return -EINVAL; |
818 | } | |
1da177e4 LT |
819 | #ifndef NOBUFS |
820 | vfree(feed->buffer); | |
dad4a730 | 821 | feed->buffer = NULL; |
1da177e4 LT |
822 | #endif |
823 | ||
824 | feed->state = DMX_STATE_FREE; | |
825 | feed->filter->state = DMX_STATE_FREE; | |
826 | ||
827 | dvb_demux_feed_del(feed); | |
828 | ||
829 | feed->pid = 0xffff; | |
830 | ||
831 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) | |
832 | demux->pesfilter[feed->pes_type] = NULL; | |
833 | ||
3593cab5 | 834 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
835 | return 0; |
836 | } | |
837 | ||
1da177e4 LT |
838 | /****************************************************************************** |
839 | * dmx_section_feed API calls | |
840 | ******************************************************************************/ | |
841 | ||
dad4a730 AO |
842 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
843 | struct dmx_section_filter **filter) | |
1da177e4 | 844 | { |
dad4a730 | 845 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
846 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
847 | struct dvb_demux_filter *dvbdmxfilter; | |
848 | ||
3593cab5 | 849 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
850 | return -ERESTARTSYS; |
851 | ||
852 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
853 | if (!dvbdmxfilter) { | |
3593cab5 | 854 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
855 | return -EBUSY; |
856 | } | |
857 | ||
858 | spin_lock_irq(&dvbdemux->lock); | |
859 | *filter = &dvbdmxfilter->filter; | |
860 | (*filter)->parent = feed; | |
861 | (*filter)->priv = NULL; | |
862 | dvbdmxfilter->feed = dvbdmxfeed; | |
863 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
864 | dvbdmxfilter->state = DMX_STATE_READY; | |
865 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
866 | dvbdmxfeed->filter = dvbdmxfilter; | |
867 | spin_unlock_irq(&dvbdemux->lock); | |
868 | ||
3593cab5 | 869 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
870 | return 0; |
871 | } | |
872 | ||
dad4a730 AO |
873 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
874 | u16 pid, size_t circular_buffer_size, | |
875 | int check_crc) | |
1da177e4 | 876 | { |
dad4a730 | 877 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
878 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
879 | ||
880 | if (pid > 0x1fff) | |
881 | return -EINVAL; | |
882 | ||
3593cab5 | 883 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
884 | return -ERESTARTSYS; |
885 | ||
886 | dvb_demux_feed_add(dvbdmxfeed); | |
887 | ||
888 | dvbdmxfeed->pid = pid; | |
889 | dvbdmxfeed->buffer_size = circular_buffer_size; | |
1da177e4 LT |
890 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
891 | ||
892 | #ifdef NOBUFS | |
893 | dvbdmxfeed->buffer = NULL; | |
894 | #else | |
dad4a730 | 895 | dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size); |
1da177e4 | 896 | if (!dvbdmxfeed->buffer) { |
3593cab5 | 897 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
898 | return -ENOMEM; |
899 | } | |
900 | #endif | |
901 | ||
902 | dvbdmxfeed->state = DMX_STATE_READY; | |
3593cab5 | 903 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
904 | return 0; |
905 | } | |
906 | ||
1da177e4 LT |
907 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
908 | { | |
909 | int i; | |
910 | struct dvb_demux_filter *f; | |
911 | struct dmx_section_filter *sf; | |
912 | u8 mask, mode, doneq; | |
913 | ||
dad4a730 | 914 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
915 | return; |
916 | do { | |
917 | sf = &f->filter; | |
918 | doneq = 0; | |
dad4a730 | 919 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
920 | mode = sf->filter_mode[i]; |
921 | mask = sf->filter_mask[i]; | |
922 | f->maskandmode[i] = mask & mode; | |
923 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
924 | } | |
925 | f->doneq = doneq ? 1 : 0; | |
926 | } while ((f = f->next)); | |
927 | } | |
928 | ||
1da177e4 LT |
929 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
930 | { | |
dad4a730 | 931 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
932 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
933 | int ret; | |
934 | ||
3593cab5 | 935 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
936 | return -ERESTARTSYS; |
937 | ||
938 | if (feed->is_filtering) { | |
3593cab5 | 939 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
940 | return -EBUSY; |
941 | } | |
942 | ||
943 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 944 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
945 | return -EINVAL; |
946 | } | |
947 | ||
948 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
949 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
950 | dvbdmxfeed->feed.sec.secbufp = 0; | |
951 | dvbdmxfeed->feed.sec.seclen = 0; | |
952 | ||
953 | if (!dvbdmx->start_feed) { | |
3593cab5 | 954 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
955 | return -ENODEV; |
956 | } | |
957 | ||
958 | prepare_secfilters(dvbdmxfeed); | |
959 | ||
960 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 961 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
962 | return ret; |
963 | } | |
964 | ||
965 | spin_lock_irq(&dvbdmx->lock); | |
966 | feed->is_filtering = 1; | |
967 | dvbdmxfeed->state = DMX_STATE_GO; | |
968 | spin_unlock_irq(&dvbdmx->lock); | |
969 | ||
3593cab5 | 970 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
971 | return 0; |
972 | } | |
973 | ||
dad4a730 | 974 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 975 | { |
dad4a730 | 976 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
977 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
978 | int ret; | |
979 | ||
c2788502 | 980 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
981 | |
982 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 983 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
984 | return -ENODEV; |
985 | } | |
986 | ||
987 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
988 | ||
989 | spin_lock_irq(&dvbdmx->lock); | |
990 | dvbdmxfeed->state = DMX_STATE_READY; | |
991 | feed->is_filtering = 0; | |
992 | spin_unlock_irq(&dvbdmx->lock); | |
993 | ||
3593cab5 | 994 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
995 | return ret; |
996 | } | |
997 | ||
1da177e4 | 998 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 999 | struct dmx_section_filter *filter) |
1da177e4 | 1000 | { |
dad4a730 AO |
1001 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
1002 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
1003 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
1004 | ||
c2788502 | 1005 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
1006 | |
1007 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 1008 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1009 | return -EINVAL; |
1010 | } | |
1011 | ||
1012 | if (feed->is_filtering) | |
1013 | feed->stop_filtering(feed); | |
1014 | ||
1015 | spin_lock_irq(&dvbdmx->lock); | |
1016 | f = dvbdmxfeed->filter; | |
1017 | ||
1018 | if (f == dvbdmxfilter) { | |
1019 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
1020 | } else { | |
dad4a730 | 1021 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
1022 | f = f->next; |
1023 | f->next = f->next->next; | |
1024 | } | |
1025 | ||
1026 | dvbdmxfilter->state = DMX_STATE_FREE; | |
1027 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 1028 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1029 | return 0; |
1030 | } | |
1031 | ||
1032 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
1033 | struct dmx_section_feed **feed, | |
1034 | dmx_section_cb callback) | |
1035 | { | |
dad4a730 | 1036 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
1037 | struct dvb_demux_feed *dvbdmxfeed; |
1038 | ||
3593cab5 | 1039 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
1040 | return -ERESTARTSYS; |
1041 | ||
1042 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 1043 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1044 | return -EBUSY; |
1045 | } | |
1046 | ||
1047 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
1048 | dvbdmxfeed->cb.sec = callback; | |
1049 | dvbdmxfeed->demux = dvbdmx; | |
1050 | dvbdmxfeed->pid = 0xffff; | |
1051 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
1052 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
1053 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
1054 | dvbdmxfeed->filter = NULL; | |
1055 | dvbdmxfeed->buffer = NULL; | |
1056 | ||
dad4a730 | 1057 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
1058 | (*feed)->is_filtering = 0; |
1059 | (*feed)->parent = demux; | |
1060 | (*feed)->priv = NULL; | |
1061 | ||
1062 | (*feed)->set = dmx_section_feed_set; | |
1063 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1064 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1065 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1066 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1067 | ||
3593cab5 | 1068 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1069 | return 0; |
1070 | } | |
1071 | ||
1072 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1073 | struct dmx_section_feed *feed) | |
1074 | { | |
dad4a730 AO |
1075 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1076 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1077 | |
c2788502 | 1078 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1079 | |
dad4a730 | 1080 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1081 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1082 | return -EINVAL; |
1083 | } | |
1084 | #ifndef NOBUFS | |
1085 | vfree(dvbdmxfeed->buffer); | |
dad4a730 | 1086 | dvbdmxfeed->buffer = NULL; |
1da177e4 | 1087 | #endif |
dad4a730 | 1088 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1089 | |
1090 | dvb_demux_feed_del(dvbdmxfeed); | |
1091 | ||
1092 | dvbdmxfeed->pid = 0xffff; | |
1093 | ||
3593cab5 | 1094 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1095 | return 0; |
1096 | } | |
1097 | ||
1da177e4 LT |
1098 | /****************************************************************************** |
1099 | * dvb_demux kernel data API calls | |
1100 | ******************************************************************************/ | |
1101 | ||
1102 | static int dvbdmx_open(struct dmx_demux *demux) | |
1103 | { | |
dad4a730 | 1104 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1105 | |
1106 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1107 | return -EUSERS; | |
1108 | ||
1109 | dvbdemux->users++; | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1da177e4 LT |
1113 | static int dvbdmx_close(struct dmx_demux *demux) |
1114 | { | |
dad4a730 | 1115 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1116 | |
1117 | if (dvbdemux->users == 0) | |
1118 | return -ENODEV; | |
1119 | ||
1120 | dvbdemux->users--; | |
1121 | //FIXME: release any unneeded resources if users==0 | |
1122 | return 0; | |
1123 | } | |
1124 | ||
947a0800 | 1125 | static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) |
1da177e4 | 1126 | { |
dad4a730 | 1127 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
947a0800 | 1128 | void *p; |
1da177e4 LT |
1129 | |
1130 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1131 | return -EINVAL; | |
1132 | ||
947a0800 AV |
1133 | p = kmalloc(count, GFP_USER); |
1134 | if (!p) | |
1135 | return -ENOMEM; | |
1136 | if (copy_from_user(p, buf, count)) { | |
1137 | kfree(p); | |
1138 | return -EFAULT; | |
1139 | } | |
1140 | if (mutex_lock_interruptible(&dvbdemux->mutex)) { | |
1141 | kfree(p); | |
1da177e4 | 1142 | return -ERESTARTSYS; |
947a0800 AV |
1143 | } |
1144 | dvb_dmx_swfilter(dvbdemux, p, count); | |
1145 | kfree(p); | |
3593cab5 | 1146 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1147 | |
1148 | if (signal_pending(current)) | |
1149 | return -EINTR; | |
1150 | return count; | |
1151 | } | |
1152 | ||
dad4a730 AO |
1153 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1154 | struct dmx_frontend *frontend) | |
1da177e4 | 1155 | { |
dad4a730 | 1156 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1157 | struct list_head *head = &dvbdemux->frontend_list; |
1158 | ||
1159 | list_add(&(frontend->connectivity_list), head); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
dad4a730 AO |
1164 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1165 | struct dmx_frontend *frontend) | |
1da177e4 | 1166 | { |
dad4a730 | 1167 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1168 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1169 | ||
dad4a730 | 1170 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1171 | if (DMX_FE_ENTRY(pos) == frontend) { |
1172 | list_del(pos); | |
1173 | return 0; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | return -ENODEV; | |
1178 | } | |
1179 | ||
dad4a730 | 1180 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1181 | { |
dad4a730 | 1182 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1183 | |
1184 | if (list_empty(&dvbdemux->frontend_list)) | |
1185 | return NULL; | |
dad4a730 | 1186 | |
1da177e4 LT |
1187 | return &dvbdemux->frontend_list; |
1188 | } | |
1189 | ||
dad4a730 AO |
1190 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1191 | struct dmx_frontend *frontend) | |
1da177e4 | 1192 | { |
dad4a730 | 1193 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1194 | |
1195 | if (demux->frontend) | |
1196 | return -EINVAL; | |
1197 | ||
c2788502 | 1198 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1199 | |
1200 | demux->frontend = frontend; | |
3593cab5 | 1201 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1202 | return 0; |
1203 | } | |
1204 | ||
1da177e4 LT |
1205 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1206 | { | |
dad4a730 | 1207 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1208 | |
c2788502 | 1209 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1210 | |
1211 | demux->frontend = NULL; | |
3593cab5 | 1212 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1213 | return 0; |
1214 | } | |
1215 | ||
dad4a730 | 1216 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1217 | { |
dad4a730 | 1218 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1219 | |
dad4a730 | 1220 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1221 | return 0; |
1222 | } | |
1223 | ||
1da177e4 LT |
1224 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1225 | { | |
93653467 | 1226 | int i; |
1da177e4 LT |
1227 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1228 | ||
0d834635 | 1229 | dvbdemux->cnt_storage = NULL; |
1da177e4 | 1230 | dvbdemux->users = 0; |
dad4a730 | 1231 | dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); |
1da177e4 LT |
1232 | |
1233 | if (!dvbdemux->filter) | |
1234 | return -ENOMEM; | |
1235 | ||
dad4a730 | 1236 | dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); |
1da177e4 LT |
1237 | if (!dvbdemux->feed) { |
1238 | vfree(dvbdemux->filter); | |
adefdcee | 1239 | dvbdemux->filter = NULL; |
1da177e4 LT |
1240 | return -ENOMEM; |
1241 | } | |
dad4a730 | 1242 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1243 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1244 | dvbdemux->filter[i].index = i; | |
1245 | } | |
dad4a730 | 1246 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1247 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1248 | dvbdemux->feed[i].index = i; | |
1249 | } | |
db574d7d | 1250 | |
bc081cc8 MCC |
1251 | if (dvb_demux_tscheck) { |
1252 | dvbdemux->cnt_storage = vmalloc(MAX_PID + 1); | |
1253 | ||
1254 | if (!dvbdemux->cnt_storage) | |
1255 | printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n"); | |
1256 | } | |
1257 | ||
db574d7d AO |
1258 | INIT_LIST_HEAD(&dvbdemux->frontend_list); |
1259 | ||
dad4a730 | 1260 | for (i = 0; i < DMX_TS_PES_OTHER; i++) { |
1da177e4 LT |
1261 | dvbdemux->pesfilter[i] = NULL; |
1262 | dvbdemux->pids[i] = 0xffff; | |
1263 | } | |
1264 | ||
1265 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1266 | ||
1267 | dvbdemux->playing = 0; | |
1268 | dvbdemux->recording = 0; | |
1269 | dvbdemux->tsbufp = 0; | |
1270 | ||
1271 | if (!dvbdemux->check_crc32) | |
1272 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1273 | ||
dad4a730 AO |
1274 | if (!dvbdemux->memcopy) |
1275 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1276 | |
1277 | dmx->frontend = NULL; | |
dad4a730 | 1278 | dmx->priv = dvbdemux; |
1da177e4 LT |
1279 | dmx->open = dvbdmx_open; |
1280 | dmx->close = dvbdmx_close; | |
1281 | dmx->write = dvbdmx_write; | |
1282 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1283 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1284 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1285 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1286 | ||
1da177e4 LT |
1287 | dmx->add_frontend = dvbdmx_add_frontend; |
1288 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1289 | dmx->get_frontends = dvbdmx_get_frontends; | |
1290 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1291 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1292 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1293 | ||
3593cab5 | 1294 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1295 | spin_lock_init(&dvbdemux->lock); |
1296 | ||
1da177e4 LT |
1297 | return 0; |
1298 | } | |
1da177e4 | 1299 | |
dad4a730 | 1300 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1301 | |
93653467 | 1302 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1303 | { |
0d834635 | 1304 | vfree(dvbdemux->cnt_storage); |
1da177e4 LT |
1305 | vfree(dvbdemux->filter); |
1306 | vfree(dvbdemux->feed); | |
1da177e4 | 1307 | } |
dad4a730 | 1308 | |
1da177e4 | 1309 | EXPORT_SYMBOL(dvb_dmx_release); |