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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 | 32 | |
fada1935 | 33 | #include <media/dvb_demux.h> |
1da177e4 | 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 | |
fdbeb962 MCC |
58 | #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG |
59 | # define dprintk_sect_loss(x...) dprintk(x) | |
60 | #else | |
61 | # define dprintk_sect_loss(x...) | |
62 | #endif | |
63 | ||
64 | #define set_buf_flags(__feed, __flag) \ | |
65 | do { \ | |
66 | (__feed)->buffer_flags |= (__flag); \ | |
67 | } while (0) | |
68 | ||
1da177e4 LT |
69 | /****************************************************************************** |
70 | * static inlined helper functions | |
71 | ******************************************************************************/ | |
72 | ||
1da177e4 LT |
73 | static inline u16 section_length(const u8 *buf) |
74 | { | |
dad4a730 | 75 | return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; |
1da177e4 LT |
76 | } |
77 | ||
1da177e4 LT |
78 | static inline u16 ts_pid(const u8 *buf) |
79 | { | |
dad4a730 | 80 | return ((buf[1] & 0x1f) << 8) + buf[2]; |
1da177e4 LT |
81 | } |
82 | ||
1da177e4 LT |
83 | static inline u8 payload(const u8 *tsp) |
84 | { | |
dad4a730 | 85 | if (!(tsp[3] & 0x10)) // no payload? |
1da177e4 | 86 | return 0; |
dad4a730 AO |
87 | |
88 | if (tsp[3] & 0x20) { // adaptation field? | |
89 | if (tsp[4] > 183) // corrupted data? | |
1da177e4 LT |
90 | return 0; |
91 | else | |
dad4a730 | 92 | return 184 - 1 - tsp[4]; |
1da177e4 | 93 | } |
dad4a730 | 94 | |
1da177e4 LT |
95 | return 184; |
96 | } | |
97 | ||
dad4a730 | 98 | static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) |
1da177e4 | 99 | { |
dad4a730 | 100 | return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); |
1da177e4 LT |
101 | } |
102 | ||
dad4a730 AO |
103 | static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, |
104 | size_t len) | |
1da177e4 | 105 | { |
dad4a730 | 106 | memcpy(d, s, len); |
1da177e4 LT |
107 | } |
108 | ||
1da177e4 LT |
109 | /****************************************************************************** |
110 | * Software filter functions | |
111 | ******************************************************************************/ | |
112 | ||
dad4a730 AO |
113 | static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, |
114 | const u8 *buf) | |
1da177e4 LT |
115 | { |
116 | int count = payload(buf); | |
117 | int p; | |
801edd6b MCC |
118 | int ccok; |
119 | u8 cc; | |
1da177e4 LT |
120 | |
121 | if (count == 0) | |
122 | return -1; | |
123 | ||
dad4a730 | 124 | p = 188 - count; |
1da177e4 | 125 | |
dad4a730 AO |
126 | cc = buf[3] & 0x0f; |
127 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
128 | feed->cc = cc; | |
fdbeb962 MCC |
129 | if (!ccok) { |
130 | set_buf_flags(feed, DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); | |
131 | dprintk_sect_loss("missed packet: %d instead of %d!\n", | |
132 | cc, (feed->cc + 1) & 0x0f); | |
133 | } | |
1da177e4 | 134 | |
dad4a730 | 135 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
136 | feed->peslen = 0xfffa; |
137 | ||
138 | feed->peslen += count; | |
139 | ||
fdbeb962 MCC |
140 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, |
141 | &feed->buffer_flags); | |
1da177e4 LT |
142 | } |
143 | ||
dad4a730 AO |
144 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
145 | struct dvb_demux_filter *f) | |
1da177e4 LT |
146 | { |
147 | u8 neq = 0; | |
148 | int i; | |
149 | ||
dad4a730 | 150 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
151 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
152 | ||
153 | if (f->maskandmode[i] & xor) | |
154 | return 0; | |
155 | ||
156 | neq |= f->maskandnotmode[i] & xor; | |
157 | } | |
158 | ||
159 | if (f->doneq && !neq) | |
160 | return 0; | |
161 | ||
dad4a730 | 162 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
fdbeb962 | 163 | NULL, 0, &f->filter, &feed->buffer_flags); |
1da177e4 LT |
164 | } |
165 | ||
dad4a730 | 166 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
167 | { |
168 | struct dvb_demux *demux = feed->demux; | |
169 | struct dvb_demux_filter *f = feed->filter; | |
170 | struct dmx_section_feed *sec = &feed->feed.sec; | |
171 | int section_syntax_indicator; | |
172 | ||
173 | if (!sec->is_filtering) | |
174 | return 0; | |
175 | ||
176 | if (!f) | |
177 | return 0; | |
178 | ||
179 | if (sec->check_crc) { | |
180 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
181 | if (section_syntax_indicator && | |
fdbeb962 MCC |
182 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) { |
183 | set_buf_flags(feed, DMX_BUFFER_FLAG_HAD_CRC32_DISCARD); | |
1da177e4 | 184 | return -1; |
fdbeb962 | 185 | } |
1da177e4 LT |
186 | } |
187 | ||
188 | do { | |
189 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
190 | return -1; | |
191 | } while ((f = f->next) && sec->is_filtering); | |
192 | ||
193 | sec->seclen = 0; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
1da177e4 LT |
198 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
199 | { | |
200 | struct dmx_section_feed *sec = &feed->feed.sec; | |
201 | ||
dad4a730 | 202 | if (sec->secbufp < sec->tsfeedp) { |
0f382735 | 203 | int n = sec->tsfeedp - sec->secbufp; |
1da177e4 | 204 | |
dad4a730 AO |
205 | /* |
206 | * Section padding is done with 0xff bytes entirely. | |
207 | * Due to speed reasons, we won't check all of them | |
208 | * but just first and last. | |
209 | */ | |
210 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
fdbeb962 MCC |
211 | set_buf_flags(feed, |
212 | DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); | |
213 | dprintk_sect_loss("section ts padding loss: %d/%d\n", | |
214 | n, sec->tsfeedp); | |
215 | dprintk_sect_loss("pad data: %*ph\n", n, sec->secbuf); | |
1da177e4 LT |
216 | } |
217 | } | |
1da177e4 LT |
218 | |
219 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
220 | sec->secbuf = sec->secbuf_base; | |
221 | } | |
222 | ||
223 | /* | |
dad4a730 AO |
224 | * Losless Section Demux 1.4.1 by Emard |
225 | * Valsecchi Patrick: | |
226 | * - middle of section A (no PUSI) | |
227 | * - end of section A and start of section B | |
228 | * (with PUSI pointing to the start of the second section) | |
229 | * | |
230 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
231 | * consisting of the end of section A. Basically because tsfeedp | |
232 | * is incemented and the use=0 condition is not raised | |
233 | * when the second packet arrives. | |
234 | * | |
235 | * Fix: | |
2c53275c | 236 | * when demux is started, let feed->pusi_seen = false to |
dad4a730 AO |
237 | * prevent initial feeding of garbage from the end of |
238 | * previous section. When you for the first time see PUSI=1 | |
2c53275c | 239 | * then set feed->pusi_seen = true |
dad4a730 AO |
240 | */ |
241 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
242 | const u8 *buf, u8 len) | |
1da177e4 LT |
243 | { |
244 | struct dvb_demux *demux = feed->demux; | |
245 | struct dmx_section_feed *sec = &feed->feed.sec; | |
246 | u16 limit, seclen, n; | |
247 | ||
dad4a730 | 248 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
249 | return 0; |
250 | ||
dad4a730 | 251 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
fdbeb962 MCC |
252 | set_buf_flags(feed, DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); |
253 | dprintk_sect_loss("section buffer full loss: %d/%d\n", | |
254 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, | |
255 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
256 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; |
257 | } | |
258 | ||
dad4a730 | 259 | if (len <= 0) |
1da177e4 LT |
260 | return 0; |
261 | ||
262 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
263 | sec->tsfeedp += len; | |
264 | ||
dad4a730 AO |
265 | /* |
266 | * Dump all the sections we can find in the data (Emard) | |
267 | */ | |
1da177e4 | 268 | limit = sec->tsfeedp; |
dad4a730 AO |
269 | if (limit > DMX_MAX_SECFEED_SIZE) |
270 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
271 | |
272 | /* to be sure always set secbuf */ | |
273 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
274 | ||
dad4a730 | 275 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 276 | seclen = section_length(sec->secbuf); |
b3967d6c | 277 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 278 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
279 | return 0; |
280 | sec->seclen = seclen; | |
281 | sec->crc_val = ~0; | |
282 | /* dump [secbuf .. secbuf+seclen) */ | |
fdbeb962 | 283 | if (feed->pusi_seen) { |
1da177e4 | 284 | dvb_dmx_swfilter_section_feed(feed); |
fdbeb962 MCC |
285 | } else { |
286 | set_buf_flags(feed, | |
287 | DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); | |
288 | dprintk_sect_loss("pusi not seen, discarding section data\n"); | |
289 | } | |
dad4a730 AO |
290 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
291 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
292 | } |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
dad4a730 AO |
297 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
298 | const u8 *buf) | |
1da177e4 LT |
299 | { |
300 | u8 p, count; | |
301 | int ccok, dc_i = 0; | |
302 | u8 cc; | |
303 | ||
304 | count = payload(buf); | |
305 | ||
dad4a730 | 306 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
307 | return -1; |
308 | ||
dad4a730 | 309 | p = 188 - count; /* payload start */ |
1da177e4 LT |
310 | |
311 | cc = buf[3] & 0x0f; | |
312 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
313 | feed->cc = cc; | |
314 | ||
315 | if (buf[3] & 0x20) { | |
316 | /* adaption field present, check for discontinuity_indicator */ | |
317 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
318 | dc_i = 1; | |
319 | } | |
320 | ||
321 | if (!ccok || dc_i) { | |
fdbeb962 MCC |
322 | if (dc_i) { |
323 | set_buf_flags(feed, | |
324 | DMX_BUFFER_FLAG_DISCONTINUITY_INDICATOR); | |
325 | dprintk_sect_loss("%d frame with disconnect indicator\n", | |
0f382735 | 326 | cc); |
fdbeb962 MCC |
327 | } else { |
328 | set_buf_flags(feed, | |
329 | DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); | |
330 | dprintk_sect_loss("discontinuity: %d instead of %d. %d bytes lost\n", | |
0f382735 | 331 | cc, (feed->cc + 1) & 0x0f, count + 4); |
fdbeb962 | 332 | } |
dad4a730 | 333 | /* |
fdbeb962 | 334 | * those bytes under some circumstances will again be reported |
dad4a730 AO |
335 | * in the following dvb_dmx_swfilter_section_new |
336 | */ | |
fdbeb962 | 337 | |
dad4a730 | 338 | /* |
2c53275c | 339 | * Discontinuity detected. Reset pusi_seen to |
dad4a730 | 340 | * stop feeding of suspicious data until next PUSI=1 arrives |
fed488b3 MCC |
341 | * |
342 | * FIXME: does it make sense if the MPEG-TS is the one | |
343 | * reporting discontinuity? | |
dad4a730 | 344 | */ |
fdbeb962 | 345 | |
2c53275c | 346 | feed->pusi_seen = false; |
1da177e4 | 347 | dvb_dmx_swfilter_section_new(feed); |
1da177e4 LT |
348 | } |
349 | ||
350 | if (buf[1] & 0x40) { | |
dad4a730 | 351 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 352 | if (count > 1 && buf[p] < count) { |
dad4a730 | 353 | const u8 *before = &buf[p + 1]; |
1da177e4 | 354 | u8 before_len = buf[p]; |
dad4a730 AO |
355 | const u8 *after = &before[before_len]; |
356 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 357 | |
dad4a730 AO |
358 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
359 | before_len); | |
2c53275c MCC |
360 | /* before start of new section, set pusi_seen */ |
361 | feed->pusi_seen = true; | |
1da177e4 | 362 | dvb_dmx_swfilter_section_new(feed); |
dad4a730 AO |
363 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
364 | after_len); | |
fdbeb962 MCC |
365 | } else if (count > 0) { |
366 | set_buf_flags(feed, | |
367 | DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED); | |
368 | dprintk_sect_loss("PUSI=1 but %d bytes lost\n", count); | |
1da177e4 | 369 | } |
1da177e4 | 370 | } else { |
dad4a730 AO |
371 | /* PUSI=0 (is not set), no section boundary */ |
372 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 373 | } |
dad4a730 | 374 | |
1da177e4 LT |
375 | return 0; |
376 | } | |
377 | ||
dad4a730 AO |
378 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
379 | const u8 *buf) | |
1da177e4 | 380 | { |
dad4a730 | 381 | switch (feed->type) { |
1da177e4 LT |
382 | case DMX_TYPE_TS: |
383 | if (!feed->feed.ts.is_filtering) | |
384 | break; | |
385 | if (feed->ts_type & TS_PACKET) { | |
386 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
387 | dvb_dmx_swfilter_payload(feed, buf); | |
388 | else | |
fdbeb962 MCC |
389 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, |
390 | &feed->buffer_flags); | |
1da177e4 | 391 | } |
198688cd | 392 | /* Used only on full-featured devices */ |
1da177e4 LT |
393 | if (feed->ts_type & TS_DECODER) |
394 | if (feed->demux->write_to_decoder) | |
395 | feed->demux->write_to_decoder(feed, buf, 188); | |
396 | break; | |
397 | ||
398 | case DMX_TYPE_SEC: | |
399 | if (!feed->feed.sec.is_filtering) | |
400 | break; | |
401 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 402 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
403 | break; |
404 | ||
405 | default: | |
406 | break; | |
407 | } | |
408 | } | |
409 | ||
410 | #define DVR_FEED(f) \ | |
411 | (((f)->type == DMX_TYPE_TS) && \ | |
412 | ((f)->feed.ts.is_filtering) && \ | |
4a24ce3a | 413 | (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) |
1da177e4 LT |
414 | |
415 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
416 | { | |
417 | struct dvb_demux_feed *feed; | |
1da177e4 LT |
418 | u16 pid = ts_pid(buf); |
419 | int dvr_done = 0; | |
420 | ||
26b9d6c0 | 421 | if (dvb_demux_speedcheck) { |
e95be158 | 422 | ktime_t cur_time; |
26b9d6c0 AO |
423 | u64 speed_bytes, speed_timedelta; |
424 | ||
425 | demux->speed_pkts_cnt++; | |
426 | ||
427 | /* show speed every SPEED_PKTS_INTERVAL packets */ | |
428 | if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) { | |
e95be158 | 429 | cur_time = ktime_get(); |
26b9d6c0 | 430 | |
e95be158 | 431 | if (ktime_to_ns(demux->speed_last_time) != 0) { |
26b9d6c0 AO |
432 | speed_bytes = (u64)demux->speed_pkts_cnt |
433 | * 188 * 8; | |
434 | /* convert to 1024 basis */ | |
435 | speed_bytes = 1000 * div64_u64(speed_bytes, | |
436 | 1024); | |
e95be158 AB |
437 | speed_timedelta = ktime_ms_delta(cur_time, |
438 | demux->speed_last_time); | |
0f382735 MCC |
439 | if (speed_timedelta) |
440 | dprintk("TS speed %llu Kbits/sec \n", | |
441 | div64_u64(speed_bytes, | |
442 | speed_timedelta)); | |
c2c90365 | 443 | } |
26b9d6c0 AO |
444 | |
445 | demux->speed_last_time = cur_time; | |
446 | demux->speed_pkts_cnt = 0; | |
c2c90365 PST |
447 | } |
448 | } | |
26b9d6c0 | 449 | |
ae530205 | 450 | if (buf[1] & 0x80) { |
fdbeb962 MCC |
451 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
452 | if ((feed->pid != pid) && (feed->pid != 0x2000)) | |
453 | continue; | |
454 | set_buf_flags(feed, DMX_BUFFER_FLAG_TEI); | |
455 | } | |
0a93dc1c | 456 | dprintk_tscheck("TEI detected. PID=0x%x data1=0x%x\n", |
ae530205 | 457 | pid, buf[1]); |
f58c91ce | 458 | /* data in this packet can't be trusted - drop it unless |
ae530205 MK |
459 | * module option dvb_demux_feed_err_pkts is set */ |
460 | if (!dvb_demux_feed_err_pkts) | |
461 | return; | |
462 | } else /* if TEI bit is set, pid may be wrong- skip pkt counter */ | |
5144f5b7 JS |
463 | if (demux->cnt_storage && dvb_demux_tscheck) { |
464 | /* check pkt counter */ | |
465 | if (pid < MAX_PID) { | |
466 | if (buf[3] & 0x10) | |
467 | demux->cnt_storage[pid] = | |
468 | (demux->cnt_storage[pid] + 1) & 0xf; | |
469 | ||
470 | if ((buf[3] & 0xf) != demux->cnt_storage[pid]) { | |
fdbeb962 MCC |
471 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
472 | if ((feed->pid != pid) && (feed->pid != 0x2000)) | |
473 | continue; | |
474 | set_buf_flags(feed, | |
475 | DMX_BUFFER_PKT_COUNTER_MISMATCH); | |
476 | } | |
477 | ||
5144f5b7 | 478 | dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n", |
0f382735 MCC |
479 | pid, demux->cnt_storage[pid], |
480 | buf[3] & 0xf); | |
5144f5b7 JS |
481 | demux->cnt_storage[pid] = buf[3] & 0xf; |
482 | } | |
483 | } | |
484 | /* end check */ | |
c2c90365 | 485 | } |
0d834635 | 486 | |
79482619 | 487 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
1da177e4 LT |
488 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
489 | continue; | |
490 | ||
491 | /* copy each packet only once to the dvr device, even | |
492 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
493 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
494 | continue; | |
495 | ||
a4afd658 | 496 | if (feed->pid == pid) |
1da177e4 | 497 | dvb_dmx_swfilter_packet_type(feed, buf); |
a4afd658 | 498 | else if (feed->pid == 0x2000) |
fdbeb962 MCC |
499 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, |
500 | &feed->buffer_flags); | |
1da177e4 LT |
501 | } |
502 | } | |
503 | ||
dad4a730 AO |
504 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
505 | size_t count) | |
1da177e4 | 506 | { |
503f2de7 ML |
507 | unsigned long flags; |
508 | ||
509 | spin_lock_irqsave(&demux->lock, flags); | |
1da177e4 LT |
510 | |
511 | while (count--) { | |
dad4a730 AO |
512 | if (buf[0] == 0x47) |
513 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
514 | buf += 188; |
515 | } | |
516 | ||
503f2de7 | 517 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 518 | } |
1da177e4 | 519 | |
dad4a730 | 520 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 | 521 | |
38e009aa MR |
522 | static inline int find_next_packet(const u8 *buf, int pos, size_t count, |
523 | const int pktsize) | |
1da177e4 | 524 | { |
38e009aa | 525 | int start = pos, lost; |
1da177e4 | 526 | |
38e009aa MR |
527 | while (pos < count) { |
528 | if (buf[pos] == 0x47 || | |
529 | (pktsize == 204 && buf[pos] == 0xB8)) | |
530 | break; | |
531 | pos++; | |
1da177e4 LT |
532 | } |
533 | ||
38e009aa MR |
534 | lost = pos - start; |
535 | if (lost) { | |
536 | /* This garbage is part of a valid packet? */ | |
537 | int backtrack = pos - pktsize; | |
538 | if (backtrack >= 0 && (buf[backtrack] == 0x47 || | |
539 | (pktsize == 204 && buf[backtrack] == 0xB8))) | |
540 | return backtrack; | |
1da177e4 LT |
541 | } |
542 | ||
38e009aa | 543 | return pos; |
1da177e4 | 544 | } |
dad4a730 | 545 | |
38e009aa MR |
546 | /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */ |
547 | static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, | |
548 | size_t count, const int pktsize) | |
1da177e4 | 549 | { |
dad4a730 | 550 | int p = 0, i, j; |
38e009aa | 551 | const u8 *q; |
503f2de7 | 552 | unsigned long flags; |
dad4a730 | 553 | |
503f2de7 | 554 | spin_lock_irqsave(&demux->lock, flags); |
1da177e4 | 555 | |
38e009aa | 556 | if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */ |
dad4a730 | 557 | i = demux->tsbufp; |
38e009aa | 558 | j = pktsize - i; |
dad4a730 | 559 | if (count < j) { |
1da177e4 LT |
560 | memcpy(&demux->tsbuf[i], buf, count); |
561 | demux->tsbufp += count; | |
562 | goto bailout; | |
563 | } | |
564 | memcpy(&demux->tsbuf[i], buf, j); | |
38e009aa MR |
565 | if (demux->tsbuf[0] == 0x47) /* double check */ |
566 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
1da177e4 LT |
567 | demux->tsbufp = 0; |
568 | p += j; | |
569 | } | |
570 | ||
38e009aa MR |
571 | while (1) { |
572 | p = find_next_packet(buf, p, count, pktsize); | |
573 | if (p >= count) | |
574 | break; | |
575 | if (count - p < pktsize) | |
576 | break; | |
577 | ||
578 | q = &buf[p]; | |
579 | ||
580 | if (pktsize == 204 && (*q == 0xB8)) { | |
581 | memcpy(demux->tsbuf, q, 188); | |
582 | demux->tsbuf[0] = 0x47; | |
583 | q = demux->tsbuf; | |
1da177e4 | 584 | } |
38e009aa MR |
585 | dvb_dmx_swfilter_packet(demux, q); |
586 | p += pktsize; | |
587 | } | |
588 | ||
589 | i = count - p; | |
590 | if (i) { | |
591 | memcpy(demux->tsbuf, &buf[p], i); | |
592 | demux->tsbufp = i; | |
593 | if (pktsize == 204 && demux->tsbuf[0] == 0xB8) | |
594 | demux->tsbuf[0] = 0x47; | |
1da177e4 LT |
595 | } |
596 | ||
597 | bailout: | |
503f2de7 | 598 | spin_unlock_irqrestore(&demux->lock, flags); |
1da177e4 | 599 | } |
1da177e4 | 600 | |
38e009aa MR |
601 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) |
602 | { | |
603 | _dvb_dmx_swfilter(demux, buf, count, 188); | |
604 | } | |
605 | EXPORT_SYMBOL(dvb_dmx_swfilter); | |
606 | ||
607 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
608 | { | |
609 | _dvb_dmx_swfilter(demux, buf, count, 204); | |
610 | } | |
dad4a730 | 611 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 612 | |
8e156702 MK |
613 | void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count) |
614 | { | |
503f2de7 ML |
615 | unsigned long flags; |
616 | ||
617 | spin_lock_irqsave(&demux->lock, flags); | |
8e156702 | 618 | |
fdbeb962 MCC |
619 | demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts, |
620 | &demux->feed->buffer_flags); | |
8e156702 | 621 | |
503f2de7 | 622 | spin_unlock_irqrestore(&demux->lock, flags); |
8e156702 MK |
623 | } |
624 | EXPORT_SYMBOL(dvb_dmx_swfilter_raw); | |
625 | ||
dad4a730 | 626 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
627 | { |
628 | int i; | |
629 | ||
dad4a730 | 630 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
631 | if (demux->filter[i].state == DMX_STATE_FREE) |
632 | break; | |
633 | ||
634 | if (i == demux->filternum) | |
635 | return NULL; | |
636 | ||
637 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
638 | ||
639 | return &demux->filter[i]; | |
640 | } | |
641 | ||
dad4a730 | 642 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
643 | { |
644 | int i; | |
645 | ||
dad4a730 | 646 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
647 | if (demux->feed[i].state == DMX_STATE_FREE) |
648 | break; | |
649 | ||
650 | if (i == demux->feednum) | |
651 | return NULL; | |
652 | ||
653 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
654 | ||
655 | return &demux->feed[i]; | |
656 | } | |
657 | ||
658 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
659 | { | |
660 | struct dvb_demux_feed *entry; | |
661 | ||
662 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
663 | if (entry == feed) | |
664 | return 1; | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
670 | { | |
671 | spin_lock_irq(&feed->demux->lock); | |
672 | if (dvb_demux_feed_find(feed)) { | |
b3ad24d2 | 673 | pr_err("%s: feed already in list (type=%x state=%x pid=%x)\n", |
46b4f7c1 | 674 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
675 | goto out; |
676 | } | |
677 | ||
678 | list_add(&feed->list_head, &feed->demux->feed_list); | |
679 | out: | |
680 | spin_unlock_irq(&feed->demux->lock); | |
681 | } | |
682 | ||
683 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
684 | { | |
685 | spin_lock_irq(&feed->demux->lock); | |
686 | if (!(dvb_demux_feed_find(feed))) { | |
b3ad24d2 | 687 | pr_err("%s: feed not in list (type=%x state=%x pid=%x)\n", |
46b4f7c1 | 688 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
689 | goto out; |
690 | } | |
691 | ||
692 | list_del(&feed->list_head); | |
693 | out: | |
694 | spin_unlock_irq(&feed->demux->lock); | |
695 | } | |
696 | ||
dad4a730 | 697 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
dd79d27e | 698 | enum dmx_ts_pes pes_type, ktime_t timeout) |
1da177e4 | 699 | { |
dad4a730 | 700 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
701 | struct dvb_demux *demux = feed->demux; |
702 | ||
703 | if (pid > DMX_MAX_PID) | |
704 | return -EINVAL; | |
705 | ||
3593cab5 | 706 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
707 | return -ERESTARTSYS; |
708 | ||
709 | if (ts_type & TS_DECODER) { | |
fde04ab9 | 710 | if (pes_type >= DMX_PES_OTHER) { |
3593cab5 | 711 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
712 | return -EINVAL; |
713 | } | |
714 | ||
715 | if (demux->pesfilter[pes_type] && | |
716 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 717 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
718 | return -EINVAL; |
719 | } | |
720 | ||
721 | demux->pesfilter[pes_type] = feed; | |
722 | demux->pids[pes_type] = pid; | |
723 | } | |
724 | ||
725 | dvb_demux_feed_add(feed); | |
726 | ||
727 | feed->pid = pid; | |
1da177e4 | 728 | feed->timeout = timeout; |
1da177e4 LT |
729 | feed->ts_type = ts_type; |
730 | feed->pes_type = pes_type; | |
731 | ||
1da177e4 | 732 | feed->state = DMX_STATE_READY; |
3593cab5 | 733 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
734 | |
735 | return 0; | |
736 | } | |
737 | ||
dad4a730 | 738 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 739 | { |
dad4a730 | 740 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
741 | struct dvb_demux *demux = feed->demux; |
742 | int ret; | |
743 | ||
3593cab5 | 744 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
745 | return -ERESTARTSYS; |
746 | ||
747 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 748 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
749 | return -EINVAL; |
750 | } | |
751 | ||
752 | if (!demux->start_feed) { | |
3593cab5 | 753 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
754 | return -ENODEV; |
755 | } | |
756 | ||
757 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 758 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
759 | return ret; |
760 | } | |
761 | ||
762 | spin_lock_irq(&demux->lock); | |
763 | ts_feed->is_filtering = 1; | |
764 | feed->state = DMX_STATE_GO; | |
765 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 766 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
767 | |
768 | return 0; | |
769 | } | |
770 | ||
dad4a730 | 771 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 772 | { |
dad4a730 | 773 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
774 | struct dvb_demux *demux = feed->demux; |
775 | int ret; | |
776 | ||
c2788502 | 777 | mutex_lock(&demux->mutex); |
1da177e4 LT |
778 | |
779 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 780 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
781 | return -EINVAL; |
782 | } | |
783 | ||
784 | if (!demux->stop_feed) { | |
3593cab5 | 785 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
786 | return -ENODEV; |
787 | } | |
788 | ||
789 | ret = demux->stop_feed(feed); | |
790 | ||
791 | spin_lock_irq(&demux->lock); | |
792 | ts_feed->is_filtering = 0; | |
793 | feed->state = DMX_STATE_ALLOCATED; | |
794 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 795 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
796 | |
797 | return ret; | |
798 | } | |
799 | ||
dad4a730 AO |
800 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
801 | struct dmx_ts_feed **ts_feed, | |
802 | dmx_ts_cb callback) | |
1da177e4 | 803 | { |
dad4a730 | 804 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
805 | struct dvb_demux_feed *feed; |
806 | ||
3593cab5 | 807 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
808 | return -ERESTARTSYS; |
809 | ||
810 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 811 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
812 | return -EBUSY; |
813 | } | |
814 | ||
815 | feed->type = DMX_TYPE_TS; | |
816 | feed->cb.ts = callback; | |
817 | feed->demux = demux; | |
818 | feed->pid = 0xffff; | |
819 | feed->peslen = 0xfffa; | |
fdbeb962 | 820 | feed->buffer_flags = 0; |
1da177e4 LT |
821 | |
822 | (*ts_feed) = &feed->feed.ts; | |
823 | (*ts_feed)->parent = dmx; | |
824 | (*ts_feed)->priv = NULL; | |
825 | (*ts_feed)->is_filtering = 0; | |
826 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
827 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
828 | (*ts_feed)->set = dmx_ts_feed_set; | |
829 | ||
1da177e4 LT |
830 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
831 | feed->state = DMX_STATE_FREE; | |
3593cab5 | 832 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
833 | return -EBUSY; |
834 | } | |
835 | ||
836 | feed->filter->type = DMX_TYPE_TS; | |
837 | feed->filter->feed = feed; | |
838 | feed->filter->state = DMX_STATE_READY; | |
839 | ||
3593cab5 | 840 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
841 | |
842 | return 0; | |
843 | } | |
844 | ||
dad4a730 AO |
845 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, |
846 | struct dmx_ts_feed *ts_feed) | |
1da177e4 | 847 | { |
dad4a730 AO |
848 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
849 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; | |
1da177e4 | 850 | |
c2788502 | 851 | mutex_lock(&demux->mutex); |
1da177e4 LT |
852 | |
853 | if (feed->state == DMX_STATE_FREE) { | |
3593cab5 | 854 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
855 | return -EINVAL; |
856 | } | |
1da177e4 LT |
857 | |
858 | feed->state = DMX_STATE_FREE; | |
859 | feed->filter->state = DMX_STATE_FREE; | |
860 | ||
861 | dvb_demux_feed_del(feed); | |
862 | ||
863 | feed->pid = 0xffff; | |
864 | ||
fde04ab9 | 865 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER) |
1da177e4 LT |
866 | demux->pesfilter[feed->pes_type] = NULL; |
867 | ||
3593cab5 | 868 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
869 | return 0; |
870 | } | |
871 | ||
1da177e4 LT |
872 | /****************************************************************************** |
873 | * dmx_section_feed API calls | |
874 | ******************************************************************************/ | |
875 | ||
dad4a730 AO |
876 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
877 | struct dmx_section_filter **filter) | |
1da177e4 | 878 | { |
dad4a730 | 879 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
880 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
881 | struct dvb_demux_filter *dvbdmxfilter; | |
882 | ||
3593cab5 | 883 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
884 | return -ERESTARTSYS; |
885 | ||
886 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
887 | if (!dvbdmxfilter) { | |
3593cab5 | 888 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
889 | return -EBUSY; |
890 | } | |
891 | ||
892 | spin_lock_irq(&dvbdemux->lock); | |
893 | *filter = &dvbdmxfilter->filter; | |
894 | (*filter)->parent = feed; | |
895 | (*filter)->priv = NULL; | |
896 | dvbdmxfilter->feed = dvbdmxfeed; | |
897 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
898 | dvbdmxfilter->state = DMX_STATE_READY; | |
899 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
900 | dvbdmxfeed->filter = dvbdmxfilter; | |
901 | spin_unlock_irq(&dvbdemux->lock); | |
902 | ||
3593cab5 | 903 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
904 | return 0; |
905 | } | |
906 | ||
dad4a730 | 907 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
dd79d27e | 908 | u16 pid, int check_crc) |
1da177e4 | 909 | { |
dad4a730 | 910 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
911 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
912 | ||
913 | if (pid > 0x1fff) | |
914 | return -EINVAL; | |
915 | ||
3593cab5 | 916 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
917 | return -ERESTARTSYS; |
918 | ||
919 | dvb_demux_feed_add(dvbdmxfeed); | |
920 | ||
921 | dvbdmxfeed->pid = pid; | |
1da177e4 LT |
922 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
923 | ||
1da177e4 | 924 | dvbdmxfeed->state = DMX_STATE_READY; |
3593cab5 | 925 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
926 | return 0; |
927 | } | |
928 | ||
1da177e4 LT |
929 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
930 | { | |
931 | int i; | |
932 | struct dvb_demux_filter *f; | |
933 | struct dmx_section_filter *sf; | |
934 | u8 mask, mode, doneq; | |
935 | ||
dad4a730 | 936 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
937 | return; |
938 | do { | |
939 | sf = &f->filter; | |
392cc7af | 940 | doneq = false; |
dad4a730 | 941 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
942 | mode = sf->filter_mode[i]; |
943 | mask = sf->filter_mask[i]; | |
944 | f->maskandmode[i] = mask & mode; | |
945 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
946 | } | |
392cc7af | 947 | f->doneq = doneq ? true : false; |
1da177e4 LT |
948 | } while ((f = f->next)); |
949 | } | |
950 | ||
1da177e4 LT |
951 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
952 | { | |
dad4a730 | 953 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
954 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
955 | int ret; | |
956 | ||
3593cab5 | 957 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
958 | return -ERESTARTSYS; |
959 | ||
960 | if (feed->is_filtering) { | |
3593cab5 | 961 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
962 | return -EBUSY; |
963 | } | |
964 | ||
965 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 966 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
967 | return -EINVAL; |
968 | } | |
969 | ||
970 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
971 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
972 | dvbdmxfeed->feed.sec.secbufp = 0; | |
973 | dvbdmxfeed->feed.sec.seclen = 0; | |
974 | ||
975 | if (!dvbdmx->start_feed) { | |
3593cab5 | 976 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
977 | return -ENODEV; |
978 | } | |
979 | ||
980 | prepare_secfilters(dvbdmxfeed); | |
981 | ||
982 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 983 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
984 | return ret; |
985 | } | |
986 | ||
987 | spin_lock_irq(&dvbdmx->lock); | |
988 | feed->is_filtering = 1; | |
989 | dvbdmxfeed->state = DMX_STATE_GO; | |
990 | spin_unlock_irq(&dvbdmx->lock); | |
991 | ||
3593cab5 | 992 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
993 | return 0; |
994 | } | |
995 | ||
dad4a730 | 996 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 997 | { |
dad4a730 | 998 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
999 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
1000 | int ret; | |
1001 | ||
c2788502 | 1002 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
1003 | |
1004 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 1005 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1006 | return -ENODEV; |
1007 | } | |
1008 | ||
1009 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
1010 | ||
1011 | spin_lock_irq(&dvbdmx->lock); | |
1012 | dvbdmxfeed->state = DMX_STATE_READY; | |
1013 | feed->is_filtering = 0; | |
1014 | spin_unlock_irq(&dvbdmx->lock); | |
1015 | ||
3593cab5 | 1016 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1017 | return ret; |
1018 | } | |
1019 | ||
1da177e4 | 1020 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 1021 | struct dmx_section_filter *filter) |
1da177e4 | 1022 | { |
dad4a730 AO |
1023 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
1024 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
1025 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
1026 | ||
c2788502 | 1027 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
1028 | |
1029 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 1030 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1031 | return -EINVAL; |
1032 | } | |
1033 | ||
6633327d | 1034 | if (feed->is_filtering) { |
340f70e9 MK |
1035 | /* release dvbdmx->mutex as far as it is |
1036 | acquired by stop_filtering() itself */ | |
6633327d | 1037 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 | 1038 | feed->stop_filtering(feed); |
6633327d AK |
1039 | mutex_lock(&dvbdmx->mutex); |
1040 | } | |
1da177e4 LT |
1041 | |
1042 | spin_lock_irq(&dvbdmx->lock); | |
1043 | f = dvbdmxfeed->filter; | |
1044 | ||
1045 | if (f == dvbdmxfilter) { | |
1046 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
1047 | } else { | |
dad4a730 | 1048 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
1049 | f = f->next; |
1050 | f->next = f->next->next; | |
1051 | } | |
1052 | ||
1053 | dvbdmxfilter->state = DMX_STATE_FREE; | |
1054 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 1055 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1056 | return 0; |
1057 | } | |
1058 | ||
1059 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
1060 | struct dmx_section_feed **feed, | |
1061 | dmx_section_cb callback) | |
1062 | { | |
dad4a730 | 1063 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
1064 | struct dvb_demux_feed *dvbdmxfeed; |
1065 | ||
3593cab5 | 1066 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
1067 | return -ERESTARTSYS; |
1068 | ||
1069 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 1070 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1071 | return -EBUSY; |
1072 | } | |
1073 | ||
1074 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
1075 | dvbdmxfeed->cb.sec = callback; | |
1076 | dvbdmxfeed->demux = dvbdmx; | |
1077 | dvbdmxfeed->pid = 0xffff; | |
fdbeb962 | 1078 | dvbdmxfeed->buffer_flags = 0; |
1da177e4 LT |
1079 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; |
1080 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
1081 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
1082 | dvbdmxfeed->filter = NULL; | |
1da177e4 | 1083 | |
dad4a730 | 1084 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
1085 | (*feed)->is_filtering = 0; |
1086 | (*feed)->parent = demux; | |
1087 | (*feed)->priv = NULL; | |
1088 | ||
1089 | (*feed)->set = dmx_section_feed_set; | |
1090 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
1091 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
1092 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1093 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1094 | ||
3593cab5 | 1095 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1096 | return 0; |
1097 | } | |
1098 | ||
1099 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1100 | struct dmx_section_feed *feed) | |
1101 | { | |
dad4a730 AO |
1102 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1103 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1104 | |
c2788502 | 1105 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1106 | |
dad4a730 | 1107 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1108 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1109 | return -EINVAL; |
1110 | } | |
dad4a730 | 1111 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1112 | |
1113 | dvb_demux_feed_del(dvbdmxfeed); | |
1114 | ||
1115 | dvbdmxfeed->pid = 0xffff; | |
1116 | ||
3593cab5 | 1117 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1118 | return 0; |
1119 | } | |
1120 | ||
1da177e4 LT |
1121 | /****************************************************************************** |
1122 | * dvb_demux kernel data API calls | |
1123 | ******************************************************************************/ | |
1124 | ||
1125 | static int dvbdmx_open(struct dmx_demux *demux) | |
1126 | { | |
dad4a730 | 1127 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1128 | |
1129 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1130 | return -EUSERS; | |
1131 | ||
1132 | dvbdemux->users++; | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1da177e4 LT |
1136 | static int dvbdmx_close(struct dmx_demux *demux) |
1137 | { | |
dad4a730 | 1138 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1139 | |
1140 | if (dvbdemux->users == 0) | |
1141 | return -ENODEV; | |
1142 | ||
1143 | dvbdemux->users--; | |
1144 | //FIXME: release any unneeded resources if users==0 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
947a0800 | 1148 | static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) |
1da177e4 | 1149 | { |
dad4a730 | 1150 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
947a0800 | 1151 | void *p; |
1da177e4 LT |
1152 | |
1153 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1154 | return -EINVAL; | |
1155 | ||
c6cfe055 JL |
1156 | p = memdup_user(buf, count); |
1157 | if (IS_ERR(p)) | |
1158 | return PTR_ERR(p); | |
947a0800 AV |
1159 | if (mutex_lock_interruptible(&dvbdemux->mutex)) { |
1160 | kfree(p); | |
1da177e4 | 1161 | return -ERESTARTSYS; |
947a0800 AV |
1162 | } |
1163 | dvb_dmx_swfilter(dvbdemux, p, count); | |
1164 | kfree(p); | |
3593cab5 | 1165 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1166 | |
1167 | if (signal_pending(current)) | |
1168 | return -EINTR; | |
1169 | return count; | |
1170 | } | |
1171 | ||
dad4a730 AO |
1172 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1173 | struct dmx_frontend *frontend) | |
1da177e4 | 1174 | { |
dad4a730 | 1175 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1176 | struct list_head *head = &dvbdemux->frontend_list; |
1177 | ||
1178 | list_add(&(frontend->connectivity_list), head); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
dad4a730 AO |
1183 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1184 | struct dmx_frontend *frontend) | |
1da177e4 | 1185 | { |
dad4a730 | 1186 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1187 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1188 | ||
dad4a730 | 1189 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1190 | if (DMX_FE_ENTRY(pos) == frontend) { |
1191 | list_del(pos); | |
1192 | return 0; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | return -ENODEV; | |
1197 | } | |
1198 | ||
dad4a730 | 1199 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1200 | { |
dad4a730 | 1201 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1202 | |
1203 | if (list_empty(&dvbdemux->frontend_list)) | |
1204 | return NULL; | |
dad4a730 | 1205 | |
1da177e4 LT |
1206 | return &dvbdemux->frontend_list; |
1207 | } | |
1208 | ||
dad4a730 AO |
1209 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1210 | struct dmx_frontend *frontend) | |
1da177e4 | 1211 | { |
dad4a730 | 1212 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1213 | |
1214 | if (demux->frontend) | |
1215 | return -EINVAL; | |
1216 | ||
c2788502 | 1217 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1218 | |
1219 | demux->frontend = frontend; | |
3593cab5 | 1220 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1221 | return 0; |
1222 | } | |
1223 | ||
1da177e4 LT |
1224 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1225 | { | |
dad4a730 | 1226 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1227 | |
c2788502 | 1228 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1229 | |
1230 | demux->frontend = NULL; | |
3593cab5 | 1231 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1232 | return 0; |
1233 | } | |
1234 | ||
dad4a730 | 1235 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1236 | { |
dad4a730 | 1237 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1238 | |
dad4a730 | 1239 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1240 | return 0; |
1241 | } | |
1242 | ||
1da177e4 LT |
1243 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1244 | { | |
93653467 | 1245 | int i; |
1da177e4 LT |
1246 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1247 | ||
0d834635 | 1248 | dvbdemux->cnt_storage = NULL; |
1da177e4 | 1249 | dvbdemux->users = 0; |
42bc47b3 KC |
1250 | dvbdemux->filter = vmalloc(array_size(sizeof(struct dvb_demux_filter), |
1251 | dvbdemux->filternum)); | |
1da177e4 LT |
1252 | |
1253 | if (!dvbdemux->filter) | |
1254 | return -ENOMEM; | |
1255 | ||
42bc47b3 KC |
1256 | dvbdemux->feed = vmalloc(array_size(sizeof(struct dvb_demux_feed), |
1257 | dvbdemux->feednum)); | |
1da177e4 LT |
1258 | if (!dvbdemux->feed) { |
1259 | vfree(dvbdemux->filter); | |
adefdcee | 1260 | dvbdemux->filter = NULL; |
1da177e4 LT |
1261 | return -ENOMEM; |
1262 | } | |
dad4a730 | 1263 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1264 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1265 | dvbdemux->filter[i].index = i; | |
1266 | } | |
dad4a730 | 1267 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1268 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1269 | dvbdemux->feed[i].index = i; | |
1270 | } | |
db574d7d | 1271 | |
ab6a21f3 AO |
1272 | dvbdemux->cnt_storage = vmalloc(MAX_PID + 1); |
1273 | if (!dvbdemux->cnt_storage) | |
b3ad24d2 | 1274 | pr_warn("Couldn't allocate memory for TS/TEI check. Disabling it\n"); |
bc081cc8 | 1275 | |
db574d7d AO |
1276 | INIT_LIST_HEAD(&dvbdemux->frontend_list); |
1277 | ||
fde04ab9 | 1278 | for (i = 0; i < DMX_PES_OTHER; i++) { |
1da177e4 LT |
1279 | dvbdemux->pesfilter[i] = NULL; |
1280 | dvbdemux->pids[i] = 0xffff; | |
1281 | } | |
1282 | ||
1283 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1284 | ||
1285 | dvbdemux->playing = 0; | |
1286 | dvbdemux->recording = 0; | |
1287 | dvbdemux->tsbufp = 0; | |
1288 | ||
1289 | if (!dvbdemux->check_crc32) | |
1290 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1291 | ||
dad4a730 AO |
1292 | if (!dvbdemux->memcopy) |
1293 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1294 | |
1295 | dmx->frontend = NULL; | |
dad4a730 | 1296 | dmx->priv = dvbdemux; |
1da177e4 LT |
1297 | dmx->open = dvbdmx_open; |
1298 | dmx->close = dvbdmx_close; | |
1299 | dmx->write = dvbdmx_write; | |
1300 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1301 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1302 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1303 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1304 | ||
1da177e4 LT |
1305 | dmx->add_frontend = dvbdmx_add_frontend; |
1306 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1307 | dmx->get_frontends = dvbdmx_get_frontends; | |
1308 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1309 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1310 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1311 | ||
3593cab5 | 1312 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1313 | spin_lock_init(&dvbdemux->lock); |
1314 | ||
1da177e4 LT |
1315 | return 0; |
1316 | } | |
1da177e4 | 1317 | |
dad4a730 | 1318 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1319 | |
93653467 | 1320 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1321 | { |
0d834635 | 1322 | vfree(dvbdemux->cnt_storage); |
1da177e4 LT |
1323 | vfree(dvbdemux->filter); |
1324 | vfree(dvbdemux->feed); | |
1da177e4 | 1325 | } |
dad4a730 | 1326 | |
1da177e4 | 1327 | EXPORT_SYMBOL(dvb_dmx_release); |