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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 | * | |
1da177e4 LT |
18 | */ |
19 | ||
b3ad24d2 MCC |
20 | #define pr_fmt(fmt) "dvb_demux: " fmt |
21 | ||
174cd4b1 | 22 | #include <linux/sched/signal.h> |
1da177e4 LT |
23 | #include <linux/spinlock.h> |
24 | #include <linux/slab.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/poll.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/crc32.h> | |
7c0f6ba6 | 30 | #include <linux/uaccess.h> |
26b9d6c0 | 31 | #include <asm/div64.h> |
1da177e4 LT |
32 | |
33 | #include "dvb_demux.h" | |
34 | ||
0d834635 AO |
35 | static int dvb_demux_tscheck; |
36 | module_param(dvb_demux_tscheck, int, 0644); | |
37 | MODULE_PARM_DESC(dvb_demux_tscheck, | |
38 | "enable transport stream continuity and TEI check"); | |
39 | ||
26b9d6c0 AO |
40 | static int dvb_demux_speedcheck; |
41 | module_param(dvb_demux_speedcheck, int, 0644); | |
42 | MODULE_PARM_DESC(dvb_demux_speedcheck, | |
43 | "enable transport stream speed check"); | |
44 | ||
ae530205 MK |
45 | static int dvb_demux_feed_err_pkts = 1; |
46 | module_param(dvb_demux_feed_err_pkts, int, 0644); | |
47 | MODULE_PARM_DESC(dvb_demux_feed_err_pkts, | |
48 | "when set to 0, drop packets with the TEI bit set (1 by default)"); | |
49 | ||
b3ad24d2 MCC |
50 | #define dprintk(fmt, arg...) \ |
51 | printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg) | |
52 | ||
53 | #define dprintk_tscheck(x...) do { \ | |
54 | if (dvb_demux_tscheck && printk_ratelimit()) \ | |
55 | dprintk(x); \ | |
56 | } while (0) | |
0d834635 | 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; | |
801edd6b MCC |
107 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
108 | int ccok; | |
109 | u8 cc; | |
110 | #endif | |
1da177e4 LT |
111 | |
112 | if (count == 0) | |
113 | return -1; | |
114 | ||
dad4a730 | 115 | p = 188 - count; |
1da177e4 | 116 | |
801edd6b | 117 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
dad4a730 AO |
118 | cc = buf[3] & 0x0f; |
119 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
120 | feed->cc = cc; | |
1da177e4 | 121 | if (!ccok) |
b3ad24d2 | 122 | dprintk("missed packet!\n"); |
801edd6b | 123 | #endif |
1da177e4 | 124 | |
dad4a730 | 125 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
126 | feed->peslen = 0xfffa; |
127 | ||
128 | feed->peslen += count; | |
129 | ||
2f684b23 | 130 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts); |
1da177e4 LT |
131 | } |
132 | ||
dad4a730 AO |
133 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
134 | struct dvb_demux_filter *f) | |
1da177e4 LT |
135 | { |
136 | u8 neq = 0; | |
137 | int i; | |
138 | ||
dad4a730 | 139 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
140 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
141 | ||
142 | if (f->maskandmode[i] & xor) | |
143 | return 0; | |
144 | ||
145 | neq |= f->maskandnotmode[i] & xor; | |
146 | } | |
147 | ||
148 | if (f->doneq && !neq) | |
149 | return 0; | |
150 | ||
dad4a730 | 151 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
2f684b23 | 152 | NULL, 0, &f->filter); |
1da177e4 LT |
153 | } |
154 | ||
dad4a730 | 155 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
156 | { |
157 | struct dvb_demux *demux = feed->demux; | |
158 | struct dvb_demux_filter *f = feed->filter; | |
159 | struct dmx_section_feed *sec = &feed->feed.sec; | |
160 | int section_syntax_indicator; | |
161 | ||
162 | if (!sec->is_filtering) | |
163 | return 0; | |
164 | ||
165 | if (!f) | |
166 | return 0; | |
167 | ||
168 | if (sec->check_crc) { | |
169 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
170 | if (section_syntax_indicator && | |
171 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
172 | return -1; | |
173 | } | |
174 | ||
175 | do { | |
176 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
177 | return -1; | |
178 | } while ((f = f->next) && sec->is_filtering); | |
179 | ||
180 | sec->seclen = 0; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
1da177e4 LT |
185 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
186 | { | |
187 | struct dmx_section_feed *sec = &feed->feed.sec; | |
188 | ||
bbd02f6a | 189 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
dad4a730 | 190 | if (sec->secbufp < sec->tsfeedp) { |
1da177e4 LT |
191 | int i, n = sec->tsfeedp - sec->secbufp; |
192 | ||
dad4a730 AO |
193 | /* |
194 | * Section padding is done with 0xff bytes entirely. | |
195 | * Due to speed reasons, we won't check all of them | |
196 | * but just first and last. | |
197 | */ | |
198 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
b3ad24d2 | 199 | dprintk("dvb_demux.c section ts padding loss: %d/%d\n", |
1da177e4 | 200 | n, sec->tsfeedp); |
b3ad24d2 | 201 | dprintk("dvb_demux.c pad data:"); |
dad4a730 | 202 | for (i = 0; i < n; i++) |
b3ad24d2 MCC |
203 | pr_cont(" %02x", sec->secbuf[i]); |
204 | pr_cont("\n"); | |
1da177e4 LT |
205 | } |
206 | } | |
207 | #endif | |
208 | ||
209 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
210 | sec->secbuf = sec->secbuf_base; | |
211 | } | |
212 | ||
213 | /* | |
dad4a730 AO |
214 | * Losless Section Demux 1.4.1 by Emard |
215 | * Valsecchi Patrick: | |
216 | * - middle of section A (no PUSI) | |
217 | * - end of section A and start of section B | |
218 | * (with PUSI pointing to the start of the second section) | |
219 | * | |
220 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
221 | * consisting of the end of section A. Basically because tsfeedp | |
222 | * is incemented and the use=0 condition is not raised | |
223 | * when the second packet arrives. | |
224 | * | |
225 | * Fix: | |
2c53275c | 226 | * when demux is started, let feed->pusi_seen = false to |
dad4a730 AO |
227 | * prevent initial feeding of garbage from the end of |
228 | * previous section. When you for the first time see PUSI=1 | |
2c53275c | 229 | * then set feed->pusi_seen = true |
dad4a730 AO |
230 | */ |
231 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
232 | const u8 *buf, u8 len) | |
1da177e4 LT |
233 | { |
234 | struct dvb_demux *demux = feed->demux; | |
235 | struct dmx_section_feed *sec = &feed->feed.sec; | |
236 | u16 limit, seclen, n; | |
237 | ||
dad4a730 | 238 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
239 | return 0; |
240 | ||
dad4a730 | 241 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
bbd02f6a | 242 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
b3ad24d2 | 243 | dprintk("dvb_demux.c section buffer full loss: %d/%d\n", |
dad4a730 AO |
244 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, |
245 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
246 | #endif |
247 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
248 | } | |
249 | ||
dad4a730 | 250 | if (len <= 0) |
1da177e4 LT |
251 | return 0; |
252 | ||
253 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
254 | sec->tsfeedp += len; | |
255 | ||
dad4a730 AO |
256 | /* |
257 | * Dump all the sections we can find in the data (Emard) | |
258 | */ | |
1da177e4 | 259 | limit = sec->tsfeedp; |
dad4a730 AO |
260 | if (limit > DMX_MAX_SECFEED_SIZE) |
261 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
262 | |
263 | /* to be sure always set secbuf */ | |
264 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
265 | ||
dad4a730 | 266 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 267 | seclen = section_length(sec->secbuf); |
b3967d6c | 268 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 269 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
270 | return 0; |
271 | sec->seclen = seclen; | |
272 | sec->crc_val = ~0; | |
273 | /* dump [secbuf .. secbuf+seclen) */ | |
dad4a730 | 274 | if (feed->pusi_seen) |
1da177e4 | 275 | dvb_dmx_swfilter_section_feed(feed); |
bbd02f6a | 276 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
1da177e4 | 277 | else |
b3ad24d2 | 278 | dprintk("dvb_demux.c pusi not seen, discarding section data\n"); |
1da177e4 | 279 | #endif |
dad4a730 AO |
280 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
281 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
282 | } |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
dad4a730 AO |
287 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
288 | const u8 *buf) | |
1da177e4 LT |
289 | { |
290 | u8 p, count; | |
291 | int ccok, dc_i = 0; | |
292 | u8 cc; | |
293 | ||
294 | count = payload(buf); | |
295 | ||
dad4a730 | 296 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
297 | return -1; |
298 | ||
dad4a730 | 299 | p = 188 - count; /* payload start */ |
1da177e4 LT |
300 | |
301 | cc = buf[3] & 0x0f; | |
302 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
303 | feed->cc = cc; | |
304 | ||
305 | if (buf[3] & 0x20) { | |
306 | /* adaption field present, check for discontinuity_indicator */ | |
307 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
308 | dc_i = 1; | |
309 | } | |
310 | ||
311 | if (!ccok || dc_i) { | |
bbd02f6a | 312 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
b3ad24d2 MCC |
313 | dprintk("dvb_demux.c discontinuity detected %d bytes lost\n", |
314 | count); | |
dad4a730 AO |
315 | /* |
316 | * those bytes under sume circumstances will again be reported | |
317 | * in the following dvb_dmx_swfilter_section_new | |
318 | */ | |
1da177e4 | 319 | #endif |
dad4a730 | 320 | /* |
2c53275c | 321 | * Discontinuity detected. Reset pusi_seen to |
dad4a730 AO |
322 | * stop feeding of suspicious data until next PUSI=1 arrives |
323 | */ | |
2c53275c | 324 | feed->pusi_seen = false; |
1da177e4 | 325 | dvb_dmx_swfilter_section_new(feed); |
1da177e4 LT |
326 | } |
327 | ||
328 | if (buf[1] & 0x40) { | |
dad4a730 | 329 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 330 | if (count > 1 && buf[p] < count) { |
dad4a730 | 331 | const u8 *before = &buf[p + 1]; |
1da177e4 | 332 | u8 before_len = buf[p]; |
dad4a730 AO |
333 | const u8 *after = &before[before_len]; |
334 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 335 | |
dad4a730 AO |
336 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
337 | before_len); | |
2c53275c MCC |
338 | /* before start of new section, set pusi_seen */ |
339 | feed->pusi_seen = true; | |
1da177e4 | 340 | dvb_dmx_swfilter_section_new(feed); |
dad4a730 AO |
341 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
342 | after_len); | |
1da177e4 | 343 | } |
bbd02f6a | 344 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
dad4a730 | 345 | else if (count > 0) |
b3ad24d2 MCC |
346 | dprintk("dvb_demux.c PUSI=1 but %d bytes lost\n", |
347 | count); | |
1da177e4 LT |
348 | #endif |
349 | } else { | |
dad4a730 AO |
350 | /* PUSI=0 (is not set), no section boundary */ |
351 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 352 | } |
dad4a730 | 353 | |
1da177e4 LT |
354 | return 0; |
355 | } | |
356 | ||
dad4a730 AO |
357 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
358 | const u8 *buf) | |
1da177e4 | 359 | { |
dad4a730 | 360 | switch (feed->type) { |
1da177e4 LT |
361 | case DMX_TYPE_TS: |
362 | if (!feed->feed.ts.is_filtering) | |
363 | break; | |
364 | if (feed->ts_type & TS_PACKET) { | |
365 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
366 | dvb_dmx_swfilter_payload(feed, buf); | |
367 | else | |
2f684b23 | 368 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts); |
1da177e4 | 369 | } |
198688cd | 370 | /* Used only on full-featured devices */ |
1da177e4 LT |
371 | if (feed->ts_type & TS_DECODER) |
372 | if (feed->demux->write_to_decoder) | |
373 | feed->demux->write_to_decoder(feed, buf, 188); | |
374 | break; | |
375 | ||
376 | case DMX_TYPE_SEC: | |
377 | if (!feed->feed.sec.is_filtering) | |
378 | break; | |
379 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 380 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
381 | break; |
382 | ||
383 | default: | |
384 | break; | |
385 | } | |
386 | } | |
387 | ||
388 | #define DVR_FEED(f) \ | |
389 | (((f)->type == DMX_TYPE_TS) && \ | |
390 | ((f)->feed.ts.is_filtering) && \ | |
4a24ce3a | 391 | (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) |
1da177e4 LT |
392 | |
393 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
394 | { | |
395 | struct dvb_demux_feed *feed; | |
1da177e4 LT |
396 | u16 pid = ts_pid(buf); |
397 | int dvr_done = 0; | |
398 | ||
26b9d6c0 | 399 | if (dvb_demux_speedcheck) { |
e95be158 | 400 | ktime_t cur_time; |
26b9d6c0 AO |
401 | u64 speed_bytes, speed_timedelta; |
402 | ||
403 | demux->speed_pkts_cnt++; | |
404 | ||
405 | /* show speed every SPEED_PKTS_INTERVAL packets */ | |
406 | if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) { | |
e95be158 | 407 | cur_time = ktime_get(); |
26b9d6c0 | 408 | |
e95be158 | 409 | if (ktime_to_ns(demux->speed_last_time) != 0) { |
26b9d6c0 AO |
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); | |
e95be158 AB |
415 | speed_timedelta = ktime_ms_delta(cur_time, |
416 | demux->speed_last_time); | |
b3ad24d2 MCC |
417 | dprintk("TS speed %llu Kbits/sec \n", |
418 | div64_u64(speed_bytes, | |
419 | speed_timedelta)); | |
c2c90365 | 420 | } |
26b9d6c0 AO |
421 | |
422 | demux->speed_last_time = cur_time; | |
423 | demux->speed_pkts_cnt = 0; | |
c2c90365 PST |
424 | } |
425 | } | |
26b9d6c0 | 426 | |
ae530205 | 427 | if (buf[1] & 0x80) { |
0a93dc1c | 428 | dprintk_tscheck("TEI detected. PID=0x%x data1=0x%x\n", |
ae530205 | 429 | pid, buf[1]); |
f58c91ce | 430 | /* data in this packet can't be trusted - drop it unless |
ae530205 MK |
431 | * module option dvb_demux_feed_err_pkts is set */ |
432 | if (!dvb_demux_feed_err_pkts) | |
433 | return; | |
434 | } else /* if TEI bit is set, pid may be wrong- skip pkt counter */ | |
5144f5b7 JS |
435 | if (demux->cnt_storage && dvb_demux_tscheck) { |
436 | /* check pkt counter */ | |
437 | if (pid < MAX_PID) { | |
438 | if (buf[3] & 0x10) | |
439 | demux->cnt_storage[pid] = | |
440 | (demux->cnt_storage[pid] + 1) & 0xf; | |
441 | ||
442 | if ((buf[3] & 0xf) != demux->cnt_storage[pid]) { | |
443 | dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n", | |
0d834635 AO |
444 | pid, demux->cnt_storage[pid], |
445 | buf[3] & 0xf); | |
5144f5b7 JS |
446 | demux->cnt_storage[pid] = buf[3] & 0xf; |
447 | } | |
448 | } | |
449 | /* end check */ | |
c2c90365 | 450 | } |
0d834635 | 451 | |
79482619 | 452 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
1da177e4 LT |
453 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
454 | continue; | |
455 | ||
456 | /* copy each packet only once to the dvr device, even | |
457 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
458 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
459 | continue; | |
460 | ||
a4afd658 | 461 | if (feed->pid == pid) |
1da177e4 | 462 | dvb_dmx_swfilter_packet_type(feed, buf); |
a4afd658 | 463 | else if (feed->pid == 0x2000) |
2f684b23 | 464 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts); |
1da177e4 LT |
465 | } |
466 | } | |
467 | ||
dad4a730 AO |
468 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
469 | size_t count) | |
1da177e4 | 470 | { |
503f2de7 ML |
471 | unsigned long flags; |
472 | ||
473 | spin_lock_irqsave(&demux->lock, flags); | |
1da177e4 LT |
474 | |
475 | while (count--) { | |
dad4a730 AO |
476 | if (buf[0] == 0x47) |
477 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
478 | buf += 188; |
479 | } | |
480 | ||
503f2de7 | 481 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 482 | } |
1da177e4 | 483 | |
dad4a730 | 484 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 | 485 | |
38e009aa MR |
486 | static inline int find_next_packet(const u8 *buf, int pos, size_t count, |
487 | const int pktsize) | |
1da177e4 | 488 | { |
38e009aa | 489 | int start = pos, lost; |
1da177e4 | 490 | |
38e009aa MR |
491 | while (pos < count) { |
492 | if (buf[pos] == 0x47 || | |
493 | (pktsize == 204 && buf[pos] == 0xB8)) | |
494 | break; | |
495 | pos++; | |
1da177e4 LT |
496 | } |
497 | ||
38e009aa MR |
498 | lost = pos - start; |
499 | if (lost) { | |
500 | /* This garbage is part of a valid packet? */ | |
501 | int backtrack = pos - pktsize; | |
502 | if (backtrack >= 0 && (buf[backtrack] == 0x47 || | |
503 | (pktsize == 204 && buf[backtrack] == 0xB8))) | |
504 | return backtrack; | |
1da177e4 LT |
505 | } |
506 | ||
38e009aa | 507 | return pos; |
1da177e4 | 508 | } |
dad4a730 | 509 | |
38e009aa MR |
510 | /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */ |
511 | static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, | |
512 | size_t count, const int pktsize) | |
1da177e4 | 513 | { |
dad4a730 | 514 | int p = 0, i, j; |
38e009aa | 515 | const u8 *q; |
503f2de7 | 516 | unsigned long flags; |
dad4a730 | 517 | |
503f2de7 | 518 | spin_lock_irqsave(&demux->lock, flags); |
1da177e4 | 519 | |
38e009aa | 520 | if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */ |
dad4a730 | 521 | i = demux->tsbufp; |
38e009aa | 522 | j = pktsize - i; |
dad4a730 | 523 | if (count < j) { |
1da177e4 LT |
524 | memcpy(&demux->tsbuf[i], buf, count); |
525 | demux->tsbufp += count; | |
526 | goto bailout; | |
527 | } | |
528 | memcpy(&demux->tsbuf[i], buf, j); | |
38e009aa MR |
529 | if (demux->tsbuf[0] == 0x47) /* double check */ |
530 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
1da177e4 LT |
531 | demux->tsbufp = 0; |
532 | p += j; | |
533 | } | |
534 | ||
38e009aa MR |
535 | while (1) { |
536 | p = find_next_packet(buf, p, count, pktsize); | |
537 | if (p >= count) | |
538 | break; | |
539 | if (count - p < pktsize) | |
540 | break; | |
541 | ||
542 | q = &buf[p]; | |
543 | ||
544 | if (pktsize == 204 && (*q == 0xB8)) { | |
545 | memcpy(demux->tsbuf, q, 188); | |
546 | demux->tsbuf[0] = 0x47; | |
547 | q = demux->tsbuf; | |
1da177e4 | 548 | } |
38e009aa MR |
549 | dvb_dmx_swfilter_packet(demux, q); |
550 | p += pktsize; | |
551 | } | |
552 | ||
553 | i = count - p; | |
554 | if (i) { | |
555 | memcpy(demux->tsbuf, &buf[p], i); | |
556 | demux->tsbufp = i; | |
557 | if (pktsize == 204 && demux->tsbuf[0] == 0xB8) | |
558 | demux->tsbuf[0] = 0x47; | |
1da177e4 LT |
559 | } |
560 | ||
561 | bailout: | |
503f2de7 | 562 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 563 | } |
1da177e4 | 564 | |
38e009aa MR |
565 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) |
566 | { | |
567 | _dvb_dmx_swfilter(demux, buf, count, 188); | |
568 | } | |
569 | EXPORT_SYMBOL(dvb_dmx_swfilter); | |
570 | ||
571 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
572 | { | |
573 | _dvb_dmx_swfilter(demux, buf, count, 204); | |
574 | } | |
dad4a730 | 575 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 576 | |
8e156702 MK |
577 | void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count) |
578 | { | |
503f2de7 ML |
579 | unsigned long flags; |
580 | ||
581 | spin_lock_irqsave(&demux->lock, flags); | |
8e156702 | 582 | |
2f684b23 | 583 | demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts); |
8e156702 | 584 | |
503f2de7 | 585 | spin_unlock_irqrestore(&demux->lock, flags); |
8e156702 MK |
586 | } |
587 | EXPORT_SYMBOL(dvb_dmx_swfilter_raw); | |
588 | ||
dad4a730 | 589 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
590 | { |
591 | int i; | |
592 | ||
dad4a730 | 593 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
594 | if (demux->filter[i].state == DMX_STATE_FREE) |
595 | break; | |
596 | ||
597 | if (i == demux->filternum) | |
598 | return NULL; | |
599 | ||
600 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
601 | ||
602 | return &demux->filter[i]; | |
603 | } | |
604 | ||
dad4a730 | 605 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
606 | { |
607 | int i; | |
608 | ||
dad4a730 | 609 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
610 | if (demux->feed[i].state == DMX_STATE_FREE) |
611 | break; | |
612 | ||
613 | if (i == demux->feednum) | |
614 | return NULL; | |
615 | ||
616 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
617 | ||
618 | return &demux->feed[i]; | |
619 | } | |
620 | ||
621 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
622 | { | |
623 | struct dvb_demux_feed *entry; | |
624 | ||
625 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
626 | if (entry == feed) | |
627 | return 1; | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
633 | { | |
634 | spin_lock_irq(&feed->demux->lock); | |
635 | if (dvb_demux_feed_find(feed)) { | |
b3ad24d2 | 636 | pr_err("%s: feed already in list (type=%x state=%x pid=%x)\n", |
46b4f7c1 | 637 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
638 | goto out; |
639 | } | |
640 | ||
641 | list_add(&feed->list_head, &feed->demux->feed_list); | |
642 | out: | |
643 | spin_unlock_irq(&feed->demux->lock); | |
644 | } | |
645 | ||
646 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
647 | { | |
648 | spin_lock_irq(&feed->demux->lock); | |
649 | if (!(dvb_demux_feed_find(feed))) { | |
b3ad24d2 | 650 | pr_err("%s: feed not in list (type=%x state=%x pid=%x)\n", |
46b4f7c1 | 651 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
652 | goto out; |
653 | } | |
654 | ||
655 | list_del(&feed->list_head); | |
656 | out: | |
657 | spin_unlock_irq(&feed->demux->lock); | |
658 | } | |
659 | ||
dad4a730 | 660 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
dd79d27e | 661 | enum dmx_ts_pes pes_type, ktime_t timeout) |
1da177e4 | 662 | { |
dad4a730 | 663 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
664 | struct dvb_demux *demux = feed->demux; |
665 | ||
666 | if (pid > DMX_MAX_PID) | |
667 | return -EINVAL; | |
668 | ||
3593cab5 | 669 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
670 | return -ERESTARTSYS; |
671 | ||
672 | if (ts_type & TS_DECODER) { | |
fde04ab9 | 673 | if (pes_type >= DMX_PES_OTHER) { |
3593cab5 | 674 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
675 | return -EINVAL; |
676 | } | |
677 | ||
678 | if (demux->pesfilter[pes_type] && | |
679 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 680 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
681 | return -EINVAL; |
682 | } | |
683 | ||
684 | demux->pesfilter[pes_type] = feed; | |
685 | demux->pids[pes_type] = pid; | |
686 | } | |
687 | ||
688 | dvb_demux_feed_add(feed); | |
689 | ||
690 | feed->pid = pid; | |
1da177e4 | 691 | feed->timeout = timeout; |
1da177e4 LT |
692 | feed->ts_type = ts_type; |
693 | feed->pes_type = pes_type; | |
694 | ||
1da177e4 | 695 | feed->state = DMX_STATE_READY; |
3593cab5 | 696 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
dad4a730 | 701 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 702 | { |
dad4a730 | 703 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
704 | struct dvb_demux *demux = feed->demux; |
705 | int ret; | |
706 | ||
3593cab5 | 707 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
708 | return -ERESTARTSYS; |
709 | ||
710 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 711 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
712 | return -EINVAL; |
713 | } | |
714 | ||
715 | if (!demux->start_feed) { | |
3593cab5 | 716 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
717 | return -ENODEV; |
718 | } | |
719 | ||
720 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 721 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
722 | return ret; |
723 | } | |
724 | ||
725 | spin_lock_irq(&demux->lock); | |
726 | ts_feed->is_filtering = 1; | |
727 | feed->state = DMX_STATE_GO; | |
728 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 729 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
730 | |
731 | return 0; | |
732 | } | |
733 | ||
dad4a730 | 734 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 735 | { |
dad4a730 | 736 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
737 | struct dvb_demux *demux = feed->demux; |
738 | int ret; | |
739 | ||
c2788502 | 740 | mutex_lock(&demux->mutex); |
1da177e4 LT |
741 | |
742 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 743 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
744 | return -EINVAL; |
745 | } | |
746 | ||
747 | if (!demux->stop_feed) { | |
3593cab5 | 748 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
749 | return -ENODEV; |
750 | } | |
751 | ||
752 | ret = demux->stop_feed(feed); | |
753 | ||
754 | spin_lock_irq(&demux->lock); | |
755 | ts_feed->is_filtering = 0; | |
756 | feed->state = DMX_STATE_ALLOCATED; | |
757 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 758 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
759 | |
760 | return ret; | |
761 | } | |
762 | ||
dad4a730 AO |
763 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
764 | struct dmx_ts_feed **ts_feed, | |
765 | dmx_ts_cb callback) | |
1da177e4 | 766 | { |
dad4a730 | 767 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
768 | struct dvb_demux_feed *feed; |
769 | ||
3593cab5 | 770 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
771 | return -ERESTARTSYS; |
772 | ||
773 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 774 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
775 | return -EBUSY; |
776 | } | |
777 | ||
778 | feed->type = DMX_TYPE_TS; | |
779 | feed->cb.ts = callback; | |
780 | feed->demux = demux; | |
781 | feed->pid = 0xffff; | |
782 | feed->peslen = 0xfffa; | |
1da177e4 LT |
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 | |
820 | feed->state = DMX_STATE_FREE; | |
821 | feed->filter->state = DMX_STATE_FREE; | |
822 | ||
823 | dvb_demux_feed_del(feed); | |
824 | ||
825 | feed->pid = 0xffff; | |
826 | ||
fde04ab9 | 827 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER) |
1da177e4 LT |
828 | demux->pesfilter[feed->pes_type] = NULL; |
829 | ||
3593cab5 | 830 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
831 | return 0; |
832 | } | |
833 | ||
1da177e4 LT |
834 | /****************************************************************************** |
835 | * dmx_section_feed API calls | |
836 | ******************************************************************************/ | |
837 | ||
dad4a730 AO |
838 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
839 | struct dmx_section_filter **filter) | |
1da177e4 | 840 | { |
dad4a730 | 841 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
842 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
843 | struct dvb_demux_filter *dvbdmxfilter; | |
844 | ||
3593cab5 | 845 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
846 | return -ERESTARTSYS; |
847 | ||
848 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
849 | if (!dvbdmxfilter) { | |
3593cab5 | 850 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
851 | return -EBUSY; |
852 | } | |
853 | ||
854 | spin_lock_irq(&dvbdemux->lock); | |
855 | *filter = &dvbdmxfilter->filter; | |
856 | (*filter)->parent = feed; | |
857 | (*filter)->priv = NULL; | |
858 | dvbdmxfilter->feed = dvbdmxfeed; | |
859 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
860 | dvbdmxfilter->state = DMX_STATE_READY; | |
861 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
862 | dvbdmxfeed->filter = dvbdmxfilter; | |
863 | spin_unlock_irq(&dvbdemux->lock); | |
864 | ||
3593cab5 | 865 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
866 | return 0; |
867 | } | |
868 | ||
dad4a730 | 869 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
dd79d27e | 870 | u16 pid, int check_crc) |
1da177e4 | 871 | { |
dad4a730 | 872 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
873 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
874 | ||
875 | if (pid > 0x1fff) | |
876 | return -EINVAL; | |
877 | ||
3593cab5 | 878 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
879 | return -ERESTARTSYS; |
880 | ||
881 | dvb_demux_feed_add(dvbdmxfeed); | |
882 | ||
883 | dvbdmxfeed->pid = pid; | |
1da177e4 LT |
884 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
885 | ||
1da177e4 | 886 | dvbdmxfeed->state = DMX_STATE_READY; |
3593cab5 | 887 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
888 | return 0; |
889 | } | |
890 | ||
1da177e4 LT |
891 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
892 | { | |
893 | int i; | |
894 | struct dvb_demux_filter *f; | |
895 | struct dmx_section_filter *sf; | |
896 | u8 mask, mode, doneq; | |
897 | ||
dad4a730 | 898 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
899 | return; |
900 | do { | |
901 | sf = &f->filter; | |
392cc7af | 902 | doneq = false; |
dad4a730 | 903 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
904 | mode = sf->filter_mode[i]; |
905 | mask = sf->filter_mask[i]; | |
906 | f->maskandmode[i] = mask & mode; | |
907 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
908 | } | |
392cc7af | 909 | f->doneq = doneq ? true : false; |
1da177e4 LT |
910 | } while ((f = f->next)); |
911 | } | |
912 | ||
1da177e4 LT |
913 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
914 | { | |
dad4a730 | 915 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
916 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
917 | int ret; | |
918 | ||
3593cab5 | 919 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
920 | return -ERESTARTSYS; |
921 | ||
922 | if (feed->is_filtering) { | |
3593cab5 | 923 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
924 | return -EBUSY; |
925 | } | |
926 | ||
927 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 928 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
929 | return -EINVAL; |
930 | } | |
931 | ||
932 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
933 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
934 | dvbdmxfeed->feed.sec.secbufp = 0; | |
935 | dvbdmxfeed->feed.sec.seclen = 0; | |
936 | ||
937 | if (!dvbdmx->start_feed) { | |
3593cab5 | 938 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
939 | return -ENODEV; |
940 | } | |
941 | ||
942 | prepare_secfilters(dvbdmxfeed); | |
943 | ||
944 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 945 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
946 | return ret; |
947 | } | |
948 | ||
949 | spin_lock_irq(&dvbdmx->lock); | |
950 | feed->is_filtering = 1; | |
951 | dvbdmxfeed->state = DMX_STATE_GO; | |
952 | spin_unlock_irq(&dvbdmx->lock); | |
953 | ||
3593cab5 | 954 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
955 | return 0; |
956 | } | |
957 | ||
dad4a730 | 958 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 959 | { |
dad4a730 | 960 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
961 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
962 | int ret; | |
963 | ||
c2788502 | 964 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
965 | |
966 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 967 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
968 | return -ENODEV; |
969 | } | |
970 | ||
971 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
972 | ||
973 | spin_lock_irq(&dvbdmx->lock); | |
974 | dvbdmxfeed->state = DMX_STATE_READY; | |
975 | feed->is_filtering = 0; | |
976 | spin_unlock_irq(&dvbdmx->lock); | |
977 | ||
3593cab5 | 978 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
979 | return ret; |
980 | } | |
981 | ||
1da177e4 | 982 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 983 | struct dmx_section_filter *filter) |
1da177e4 | 984 | { |
dad4a730 AO |
985 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
986 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
987 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
988 | ||
c2788502 | 989 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
990 | |
991 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 992 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
993 | return -EINVAL; |
994 | } | |
995 | ||
6633327d | 996 | if (feed->is_filtering) { |
340f70e9 MK |
997 | /* release dvbdmx->mutex as far as it is |
998 | acquired by stop_filtering() itself */ | |
6633327d | 999 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 | 1000 | feed->stop_filtering(feed); |
6633327d AK |
1001 | mutex_lock(&dvbdmx->mutex); |
1002 | } | |
1da177e4 LT |
1003 | |
1004 | spin_lock_irq(&dvbdmx->lock); | |
1005 | f = dvbdmxfeed->filter; | |
1006 | ||
1007 | if (f == dvbdmxfilter) { | |
1008 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
1009 | } else { | |
dad4a730 | 1010 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
1011 | f = f->next; |
1012 | f->next = f->next->next; | |
1013 | } | |
1014 | ||
1015 | dvbdmxfilter->state = DMX_STATE_FREE; | |
1016 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 1017 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1018 | return 0; |
1019 | } | |
1020 | ||
1021 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
1022 | struct dmx_section_feed **feed, | |
1023 | dmx_section_cb callback) | |
1024 | { | |
dad4a730 | 1025 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
1026 | struct dvb_demux_feed *dvbdmxfeed; |
1027 | ||
3593cab5 | 1028 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
1029 | return -ERESTARTSYS; |
1030 | ||
1031 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 1032 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1033 | return -EBUSY; |
1034 | } | |
1035 | ||
1036 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
1037 | dvbdmxfeed->cb.sec = callback; | |
1038 | dvbdmxfeed->demux = dvbdmx; | |
1039 | dvbdmxfeed->pid = 0xffff; | |
1040 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
1041 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
1042 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
1043 | dvbdmxfeed->filter = NULL; | |
1da177e4 | 1044 | |
dad4a730 | 1045 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
1046 | (*feed)->is_filtering = 0; |
1047 | (*feed)->parent = demux; | |
1048 | (*feed)->priv = NULL; | |
1049 | ||
1050 | (*feed)->set = dmx_section_feed_set; | |
1051 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1052 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1053 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1054 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1055 | ||
3593cab5 | 1056 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1057 | return 0; |
1058 | } | |
1059 | ||
1060 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1061 | struct dmx_section_feed *feed) | |
1062 | { | |
dad4a730 AO |
1063 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1064 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1065 | |
c2788502 | 1066 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1067 | |
dad4a730 | 1068 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1069 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1070 | return -EINVAL; |
1071 | } | |
dad4a730 | 1072 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1073 | |
1074 | dvb_demux_feed_del(dvbdmxfeed); | |
1075 | ||
1076 | dvbdmxfeed->pid = 0xffff; | |
1077 | ||
3593cab5 | 1078 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1079 | return 0; |
1080 | } | |
1081 | ||
1da177e4 LT |
1082 | /****************************************************************************** |
1083 | * dvb_demux kernel data API calls | |
1084 | ******************************************************************************/ | |
1085 | ||
1086 | static int dvbdmx_open(struct dmx_demux *demux) | |
1087 | { | |
dad4a730 | 1088 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1089 | |
1090 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1091 | return -EUSERS; | |
1092 | ||
1093 | dvbdemux->users++; | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | static int dvbdmx_close(struct dmx_demux *demux) |
1098 | { | |
dad4a730 | 1099 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1100 | |
1101 | if (dvbdemux->users == 0) | |
1102 | return -ENODEV; | |
1103 | ||
1104 | dvbdemux->users--; | |
1105 | //FIXME: release any unneeded resources if users==0 | |
1106 | return 0; | |
1107 | } | |
1108 | ||
947a0800 | 1109 | static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) |
1da177e4 | 1110 | { |
dad4a730 | 1111 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
947a0800 | 1112 | void *p; |
1da177e4 LT |
1113 | |
1114 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1115 | return -EINVAL; | |
1116 | ||
c6cfe055 JL |
1117 | p = memdup_user(buf, count); |
1118 | if (IS_ERR(p)) | |
1119 | return PTR_ERR(p); | |
947a0800 AV |
1120 | if (mutex_lock_interruptible(&dvbdemux->mutex)) { |
1121 | kfree(p); | |
1da177e4 | 1122 | return -ERESTARTSYS; |
947a0800 AV |
1123 | } |
1124 | dvb_dmx_swfilter(dvbdemux, p, count); | |
1125 | kfree(p); | |
3593cab5 | 1126 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1127 | |
1128 | if (signal_pending(current)) | |
1129 | return -EINTR; | |
1130 | return count; | |
1131 | } | |
1132 | ||
dad4a730 AO |
1133 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1134 | struct dmx_frontend *frontend) | |
1da177e4 | 1135 | { |
dad4a730 | 1136 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1137 | struct list_head *head = &dvbdemux->frontend_list; |
1138 | ||
1139 | list_add(&(frontend->connectivity_list), head); | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
dad4a730 AO |
1144 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1145 | struct dmx_frontend *frontend) | |
1da177e4 | 1146 | { |
dad4a730 | 1147 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1148 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1149 | ||
dad4a730 | 1150 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1151 | if (DMX_FE_ENTRY(pos) == frontend) { |
1152 | list_del(pos); | |
1153 | return 0; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | return -ENODEV; | |
1158 | } | |
1159 | ||
dad4a730 | 1160 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1161 | { |
dad4a730 | 1162 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1163 | |
1164 | if (list_empty(&dvbdemux->frontend_list)) | |
1165 | return NULL; | |
dad4a730 | 1166 | |
1da177e4 LT |
1167 | return &dvbdemux->frontend_list; |
1168 | } | |
1169 | ||
dad4a730 AO |
1170 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1171 | struct dmx_frontend *frontend) | |
1da177e4 | 1172 | { |
dad4a730 | 1173 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1174 | |
1175 | if (demux->frontend) | |
1176 | return -EINVAL; | |
1177 | ||
c2788502 | 1178 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1179 | |
1180 | demux->frontend = frontend; | |
3593cab5 | 1181 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1182 | return 0; |
1183 | } | |
1184 | ||
1da177e4 LT |
1185 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1186 | { | |
dad4a730 | 1187 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1188 | |
c2788502 | 1189 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1190 | |
1191 | demux->frontend = NULL; | |
3593cab5 | 1192 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1193 | return 0; |
1194 | } | |
1195 | ||
dad4a730 | 1196 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1197 | { |
dad4a730 | 1198 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1199 | |
dad4a730 | 1200 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1201 | return 0; |
1202 | } | |
1203 | ||
1da177e4 LT |
1204 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1205 | { | |
93653467 | 1206 | int i; |
1da177e4 LT |
1207 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1208 | ||
0d834635 | 1209 | dvbdemux->cnt_storage = NULL; |
1da177e4 | 1210 | dvbdemux->users = 0; |
dad4a730 | 1211 | dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); |
1da177e4 LT |
1212 | |
1213 | if (!dvbdemux->filter) | |
1214 | return -ENOMEM; | |
1215 | ||
dad4a730 | 1216 | dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); |
1da177e4 LT |
1217 | if (!dvbdemux->feed) { |
1218 | vfree(dvbdemux->filter); | |
adefdcee | 1219 | dvbdemux->filter = NULL; |
1da177e4 LT |
1220 | return -ENOMEM; |
1221 | } | |
dad4a730 | 1222 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1223 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1224 | dvbdemux->filter[i].index = i; | |
1225 | } | |
dad4a730 | 1226 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1227 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1228 | dvbdemux->feed[i].index = i; | |
1229 | } | |
db574d7d | 1230 | |
ab6a21f3 AO |
1231 | dvbdemux->cnt_storage = vmalloc(MAX_PID + 1); |
1232 | if (!dvbdemux->cnt_storage) | |
b3ad24d2 | 1233 | pr_warn("Couldn't allocate memory for TS/TEI check. Disabling it\n"); |
bc081cc8 | 1234 | |
db574d7d AO |
1235 | INIT_LIST_HEAD(&dvbdemux->frontend_list); |
1236 | ||
fde04ab9 | 1237 | for (i = 0; i < DMX_PES_OTHER; i++) { |
1da177e4 LT |
1238 | dvbdemux->pesfilter[i] = NULL; |
1239 | dvbdemux->pids[i] = 0xffff; | |
1240 | } | |
1241 | ||
1242 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1243 | ||
1244 | dvbdemux->playing = 0; | |
1245 | dvbdemux->recording = 0; | |
1246 | dvbdemux->tsbufp = 0; | |
1247 | ||
1248 | if (!dvbdemux->check_crc32) | |
1249 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1250 | ||
dad4a730 AO |
1251 | if (!dvbdemux->memcopy) |
1252 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1253 | |
1254 | dmx->frontend = NULL; | |
dad4a730 | 1255 | dmx->priv = dvbdemux; |
1da177e4 LT |
1256 | dmx->open = dvbdmx_open; |
1257 | dmx->close = dvbdmx_close; | |
1258 | dmx->write = dvbdmx_write; | |
1259 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1260 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1261 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1262 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1263 | ||
1da177e4 LT |
1264 | dmx->add_frontend = dvbdmx_add_frontend; |
1265 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1266 | dmx->get_frontends = dvbdmx_get_frontends; | |
1267 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1268 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1269 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1270 | ||
3593cab5 | 1271 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1272 | spin_lock_init(&dvbdemux->lock); |
1273 | ||
1da177e4 LT |
1274 | return 0; |
1275 | } | |
1da177e4 | 1276 | |
dad4a730 | 1277 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1278 | |
93653467 | 1279 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1280 | { |
0d834635 | 1281 | vfree(dvbdemux->cnt_storage); |
1da177e4 LT |
1282 | vfree(dvbdemux->filter); |
1283 | vfree(dvbdemux->feed); | |
1da177e4 | 1284 | } |
dad4a730 | 1285 | |
1da177e4 | 1286 | EXPORT_SYMBOL(dvb_dmx_release); |