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1da177e4 LT |
1 | /* |
2 | * dvb_demux.c - DVB kernel demux API | |
3 | * | |
4 | * Copyright (C) 2000-2001 Ralph Metzler <ralph@convergence.de> | |
5 | * & Marcus Metzler <marcus@convergence.de> | |
6 | * for convergence integrated media GmbH | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public License | |
10 | * as published by the Free Software Foundation; either version 2.1 | |
11 | * of the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/spinlock.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/poll.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/crc32.h> | |
31 | #include <asm/uaccess.h> | |
32 | ||
33 | #include "dvb_demux.h" | |
34 | ||
35 | #define NOBUFS | |
36 | /* | |
37 | ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog | |
38 | */ | |
39 | // #define DVB_DEMUX_SECTION_LOSS_LOG | |
40 | ||
1da177e4 LT |
41 | /****************************************************************************** |
42 | * static inlined helper functions | |
43 | ******************************************************************************/ | |
44 | ||
1da177e4 LT |
45 | static inline u16 section_length(const u8 *buf) |
46 | { | |
dad4a730 | 47 | return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; |
1da177e4 LT |
48 | } |
49 | ||
1da177e4 LT |
50 | static inline u16 ts_pid(const u8 *buf) |
51 | { | |
dad4a730 | 52 | return ((buf[1] & 0x1f) << 8) + buf[2]; |
1da177e4 LT |
53 | } |
54 | ||
1da177e4 LT |
55 | static inline u8 payload(const u8 *tsp) |
56 | { | |
dad4a730 | 57 | if (!(tsp[3] & 0x10)) // no payload? |
1da177e4 | 58 | return 0; |
dad4a730 AO |
59 | |
60 | if (tsp[3] & 0x20) { // adaptation field? | |
61 | if (tsp[4] > 183) // corrupted data? | |
1da177e4 LT |
62 | return 0; |
63 | else | |
dad4a730 | 64 | return 184 - 1 - tsp[4]; |
1da177e4 | 65 | } |
dad4a730 | 66 | |
1da177e4 LT |
67 | return 184; |
68 | } | |
69 | ||
dad4a730 | 70 | static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) |
1da177e4 | 71 | { |
dad4a730 | 72 | return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); |
1da177e4 LT |
73 | } |
74 | ||
dad4a730 AO |
75 | static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, |
76 | size_t len) | |
1da177e4 | 77 | { |
dad4a730 | 78 | memcpy(d, s, len); |
1da177e4 LT |
79 | } |
80 | ||
1da177e4 LT |
81 | /****************************************************************************** |
82 | * Software filter functions | |
83 | ******************************************************************************/ | |
84 | ||
dad4a730 AO |
85 | static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, |
86 | const u8 *buf) | |
1da177e4 LT |
87 | { |
88 | int count = payload(buf); | |
89 | int p; | |
90 | //int ccok; | |
91 | //u8 cc; | |
92 | ||
93 | if (count == 0) | |
94 | return -1; | |
95 | ||
dad4a730 | 96 | p = 188 - count; |
1da177e4 LT |
97 | |
98 | /* | |
dad4a730 AO |
99 | cc = buf[3] & 0x0f; |
100 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
101 | feed->cc = cc; | |
1da177e4 LT |
102 | if (!ccok) |
103 | printk("missed packet!\n"); | |
104 | */ | |
105 | ||
dad4a730 | 106 | if (buf[1] & 0x40) // PUSI ? |
1da177e4 LT |
107 | feed->peslen = 0xfffa; |
108 | ||
109 | feed->peslen += count; | |
110 | ||
dad4a730 | 111 | return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); |
1da177e4 LT |
112 | } |
113 | ||
dad4a730 AO |
114 | static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, |
115 | struct dvb_demux_filter *f) | |
1da177e4 LT |
116 | { |
117 | u8 neq = 0; | |
118 | int i; | |
119 | ||
dad4a730 | 120 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
121 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
122 | ||
123 | if (f->maskandmode[i] & xor) | |
124 | return 0; | |
125 | ||
126 | neq |= f->maskandnotmode[i] & xor; | |
127 | } | |
128 | ||
129 | if (f->doneq && !neq) | |
130 | return 0; | |
131 | ||
dad4a730 AO |
132 | return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, |
133 | NULL, 0, &f->filter, DMX_OK); | |
1da177e4 LT |
134 | } |
135 | ||
dad4a730 | 136 | static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) |
1da177e4 LT |
137 | { |
138 | struct dvb_demux *demux = feed->demux; | |
139 | struct dvb_demux_filter *f = feed->filter; | |
140 | struct dmx_section_feed *sec = &feed->feed.sec; | |
141 | int section_syntax_indicator; | |
142 | ||
143 | if (!sec->is_filtering) | |
144 | return 0; | |
145 | ||
146 | if (!f) | |
147 | return 0; | |
148 | ||
149 | if (sec->check_crc) { | |
150 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); | |
151 | if (section_syntax_indicator && | |
152 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) | |
153 | return -1; | |
154 | } | |
155 | ||
156 | do { | |
157 | if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) | |
158 | return -1; | |
159 | } while ((f = f->next) && sec->is_filtering); | |
160 | ||
161 | sec->seclen = 0; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
167 | { | |
168 | struct dmx_section_feed *sec = &feed->feed.sec; | |
169 | ||
170 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 | 171 | if (sec->secbufp < sec->tsfeedp) { |
1da177e4 LT |
172 | int i, n = sec->tsfeedp - sec->secbufp; |
173 | ||
dad4a730 AO |
174 | /* |
175 | * Section padding is done with 0xff bytes entirely. | |
176 | * Due to speed reasons, we won't check all of them | |
177 | * but just first and last. | |
178 | */ | |
179 | if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { | |
1da177e4 LT |
180 | printk("dvb_demux.c section ts padding loss: %d/%d\n", |
181 | n, sec->tsfeedp); | |
182 | printk("dvb_demux.c pad data:"); | |
dad4a730 | 183 | for (i = 0; i < n; i++) |
1da177e4 LT |
184 | printk(" %02x", sec->secbuf[i]); |
185 | printk("\n"); | |
186 | } | |
187 | } | |
188 | #endif | |
189 | ||
190 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; | |
191 | sec->secbuf = sec->secbuf_base; | |
192 | } | |
193 | ||
194 | /* | |
dad4a730 AO |
195 | * Losless Section Demux 1.4.1 by Emard |
196 | * Valsecchi Patrick: | |
197 | * - middle of section A (no PUSI) | |
198 | * - end of section A and start of section B | |
199 | * (with PUSI pointing to the start of the second section) | |
200 | * | |
201 | * In this case, without feed->pusi_seen you'll receive a garbage section | |
202 | * consisting of the end of section A. Basically because tsfeedp | |
203 | * is incemented and the use=0 condition is not raised | |
204 | * when the second packet arrives. | |
205 | * | |
206 | * Fix: | |
207 | * when demux is started, let feed->pusi_seen = 0 to | |
208 | * prevent initial feeding of garbage from the end of | |
209 | * previous section. When you for the first time see PUSI=1 | |
210 | * then set feed->pusi_seen = 1 | |
211 | */ | |
212 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, | |
213 | const u8 *buf, u8 len) | |
1da177e4 LT |
214 | { |
215 | struct dvb_demux *demux = feed->demux; | |
216 | struct dmx_section_feed *sec = &feed->feed.sec; | |
217 | u16 limit, seclen, n; | |
218 | ||
dad4a730 | 219 | if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
1da177e4 LT |
220 | return 0; |
221 | ||
dad4a730 | 222 | if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { |
1da177e4 LT |
223 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
224 | printk("dvb_demux.c section buffer full loss: %d/%d\n", | |
dad4a730 AO |
225 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, |
226 | DMX_MAX_SECFEED_SIZE); | |
1da177e4 LT |
227 | #endif |
228 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; | |
229 | } | |
230 | ||
dad4a730 | 231 | if (len <= 0) |
1da177e4 LT |
232 | return 0; |
233 | ||
234 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); | |
235 | sec->tsfeedp += len; | |
236 | ||
dad4a730 AO |
237 | /* |
238 | * Dump all the sections we can find in the data (Emard) | |
239 | */ | |
1da177e4 | 240 | limit = sec->tsfeedp; |
dad4a730 AO |
241 | if (limit > DMX_MAX_SECFEED_SIZE) |
242 | return -1; /* internal error should never happen */ | |
1da177e4 LT |
243 | |
244 | /* to be sure always set secbuf */ | |
245 | sec->secbuf = sec->secbuf_base + sec->secbufp; | |
246 | ||
dad4a730 | 247 | for (n = 0; sec->secbufp + 2 < limit; n++) { |
1da177e4 | 248 | seclen = section_length(sec->secbuf); |
b3967d6c | 249 | if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE |
dad4a730 | 250 | || seclen + sec->secbufp > limit) |
1da177e4 LT |
251 | return 0; |
252 | sec->seclen = seclen; | |
253 | sec->crc_val = ~0; | |
254 | /* dump [secbuf .. secbuf+seclen) */ | |
dad4a730 | 255 | if (feed->pusi_seen) |
1da177e4 LT |
256 | dvb_dmx_swfilter_section_feed(feed); |
257 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
258 | else | |
259 | printk("dvb_demux.c pusi not seen, discarding section data\n"); | |
260 | #endif | |
dad4a730 AO |
261 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
262 | sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ | |
1da177e4 LT |
263 | } |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
dad4a730 AO |
268 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, |
269 | const u8 *buf) | |
1da177e4 LT |
270 | { |
271 | u8 p, count; | |
272 | int ccok, dc_i = 0; | |
273 | u8 cc; | |
274 | ||
275 | count = payload(buf); | |
276 | ||
dad4a730 | 277 | if (count == 0) /* count == 0 if no payload or out of range */ |
1da177e4 LT |
278 | return -1; |
279 | ||
dad4a730 | 280 | p = 188 - count; /* payload start */ |
1da177e4 LT |
281 | |
282 | cc = buf[3] & 0x0f; | |
283 | ccok = ((feed->cc + 1) & 0x0f) == cc; | |
284 | feed->cc = cc; | |
285 | ||
286 | if (buf[3] & 0x20) { | |
287 | /* adaption field present, check for discontinuity_indicator */ | |
288 | if ((buf[4] > 0) && (buf[5] & 0x80)) | |
289 | dc_i = 1; | |
290 | } | |
291 | ||
292 | if (!ccok || dc_i) { | |
293 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
294 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", |
295 | count); | |
296 | /* | |
297 | * those bytes under sume circumstances will again be reported | |
298 | * in the following dvb_dmx_swfilter_section_new | |
299 | */ | |
1da177e4 | 300 | #endif |
dad4a730 AO |
301 | /* |
302 | * Discontinuity detected. Reset pusi_seen = 0 to | |
303 | * stop feeding of suspicious data until next PUSI=1 arrives | |
304 | */ | |
1da177e4 LT |
305 | feed->pusi_seen = 0; |
306 | dvb_dmx_swfilter_section_new(feed); | |
1da177e4 LT |
307 | } |
308 | ||
309 | if (buf[1] & 0x40) { | |
dad4a730 | 310 | /* PUSI=1 (is set), section boundary is here */ |
1da177e4 | 311 | if (count > 1 && buf[p] < count) { |
dad4a730 | 312 | const u8 *before = &buf[p + 1]; |
1da177e4 | 313 | u8 before_len = buf[p]; |
dad4a730 AO |
314 | const u8 *after = &before[before_len]; |
315 | u8 after_len = count - 1 - before_len; | |
1da177e4 | 316 | |
dad4a730 AO |
317 | dvb_dmx_swfilter_section_copy_dump(feed, before, |
318 | before_len); | |
1da177e4 LT |
319 | /* before start of new section, set pusi_seen = 1 */ |
320 | feed->pusi_seen = 1; | |
321 | dvb_dmx_swfilter_section_new(feed); | |
dad4a730 AO |
322 | dvb_dmx_swfilter_section_copy_dump(feed, after, |
323 | after_len); | |
1da177e4 LT |
324 | } |
325 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG | |
dad4a730 AO |
326 | else if (count > 0) |
327 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); | |
1da177e4 LT |
328 | #endif |
329 | } else { | |
dad4a730 AO |
330 | /* PUSI=0 (is not set), no section boundary */ |
331 | dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); | |
1da177e4 | 332 | } |
dad4a730 | 333 | |
1da177e4 LT |
334 | return 0; |
335 | } | |
336 | ||
dad4a730 AO |
337 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, |
338 | const u8 *buf) | |
1da177e4 | 339 | { |
dad4a730 | 340 | switch (feed->type) { |
1da177e4 LT |
341 | case DMX_TYPE_TS: |
342 | if (!feed->feed.ts.is_filtering) | |
343 | break; | |
344 | if (feed->ts_type & TS_PACKET) { | |
345 | if (feed->ts_type & TS_PAYLOAD_ONLY) | |
346 | dvb_dmx_swfilter_payload(feed, buf); | |
347 | else | |
dad4a730 AO |
348 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, |
349 | DMX_OK); | |
1da177e4 LT |
350 | } |
351 | if (feed->ts_type & TS_DECODER) | |
352 | if (feed->demux->write_to_decoder) | |
353 | feed->demux->write_to_decoder(feed, buf, 188); | |
354 | break; | |
355 | ||
356 | case DMX_TYPE_SEC: | |
357 | if (!feed->feed.sec.is_filtering) | |
358 | break; | |
359 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) | |
dad4a730 | 360 | feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; |
1da177e4 LT |
361 | break; |
362 | ||
363 | default: | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | #define DVR_FEED(f) \ | |
369 | (((f)->type == DMX_TYPE_TS) && \ | |
370 | ((f)->feed.ts.is_filtering) && \ | |
4a24ce3a | 371 | (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) |
1da177e4 LT |
372 | |
373 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) | |
374 | { | |
375 | struct dvb_demux_feed *feed; | |
1da177e4 LT |
376 | u16 pid = ts_pid(buf); |
377 | int dvr_done = 0; | |
378 | ||
79482619 | 379 | list_for_each_entry(feed, &demux->feed_list, list_head) { |
1da177e4 LT |
380 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
381 | continue; | |
382 | ||
383 | /* copy each packet only once to the dvr device, even | |
384 | * if a PID is in multiple filters (e.g. video + PCR) */ | |
385 | if ((DVR_FEED(feed)) && (dvr_done++)) | |
386 | continue; | |
387 | ||
388 | if (feed->pid == pid) { | |
389 | dvb_dmx_swfilter_packet_type(feed, buf); | |
390 | if (DVR_FEED(feed)) | |
391 | continue; | |
392 | } | |
393 | ||
394 | if (feed->pid == 0x2000) | |
395 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); | |
396 | } | |
397 | } | |
398 | ||
dad4a730 AO |
399 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, |
400 | size_t count) | |
1da177e4 | 401 | { |
28100165 | 402 | spin_lock(&demux->lock); |
1da177e4 LT |
403 | |
404 | while (count--) { | |
dad4a730 AO |
405 | if (buf[0] == 0x47) |
406 | dvb_dmx_swfilter_packet(demux, buf); | |
1da177e4 LT |
407 | buf += 188; |
408 | } | |
409 | ||
28100165 | 410 | spin_unlock(&demux->lock); |
1da177e4 | 411 | } |
1da177e4 | 412 | |
dad4a730 | 413 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
1da177e4 LT |
414 | |
415 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) | |
416 | { | |
417 | int p = 0, i, j; | |
418 | ||
28100165 | 419 | spin_lock(&demux->lock); |
1da177e4 | 420 | |
dad4a730 AO |
421 | if (demux->tsbufp) { |
422 | i = demux->tsbufp; | |
423 | j = 188 - i; | |
424 | if (count < j) { | |
1da177e4 LT |
425 | memcpy(&demux->tsbuf[i], buf, count); |
426 | demux->tsbufp += count; | |
427 | goto bailout; | |
428 | } | |
429 | memcpy(&demux->tsbuf[i], buf, j); | |
430 | if (demux->tsbuf[0] == 0x47) | |
431 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); | |
432 | demux->tsbufp = 0; | |
433 | p += j; | |
434 | } | |
435 | ||
436 | while (p < count) { | |
437 | if (buf[p] == 0x47) { | |
dad4a730 AO |
438 | if (count - p >= 188) { |
439 | dvb_dmx_swfilter_packet(demux, &buf[p]); | |
1da177e4 LT |
440 | p += 188; |
441 | } else { | |
dad4a730 AO |
442 | i = count - p; |
443 | memcpy(demux->tsbuf, &buf[p], i); | |
444 | demux->tsbufp = i; | |
1da177e4 LT |
445 | goto bailout; |
446 | } | |
447 | } else | |
448 | p++; | |
449 | } | |
450 | ||
451 | bailout: | |
28100165 | 452 | spin_unlock(&demux->lock); |
1da177e4 | 453 | } |
dad4a730 | 454 | |
1da177e4 LT |
455 | EXPORT_SYMBOL(dvb_dmx_swfilter); |
456 | ||
457 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) | |
458 | { | |
dad4a730 | 459 | int p = 0, i, j; |
1da177e4 | 460 | u8 tmppack[188]; |
dad4a730 | 461 | |
28100165 | 462 | spin_lock(&demux->lock); |
1da177e4 | 463 | |
dad4a730 AO |
464 | if (demux->tsbufp) { |
465 | i = demux->tsbufp; | |
466 | j = 204 - i; | |
467 | if (count < j) { | |
1da177e4 LT |
468 | memcpy(&demux->tsbuf[i], buf, count); |
469 | demux->tsbufp += count; | |
470 | goto bailout; | |
471 | } | |
472 | memcpy(&demux->tsbuf[i], buf, j); | |
ec675bce | 473 | if ((demux->tsbuf[0] == 0x47) || (demux->tsbuf[0] == 0xB8)) { |
1da177e4 | 474 | memcpy(tmppack, demux->tsbuf, 188); |
dad4a730 AO |
475 | if (tmppack[0] == 0xB8) |
476 | tmppack[0] = 0x47; | |
1da177e4 LT |
477 | dvb_dmx_swfilter_packet(demux, tmppack); |
478 | } | |
479 | demux->tsbufp = 0; | |
480 | p += j; | |
481 | } | |
482 | ||
483 | while (p < count) { | |
ec675bce | 484 | if ((buf[p] == 0x47) || (buf[p] == 0xB8)) { |
dad4a730 AO |
485 | if (count - p >= 204) { |
486 | memcpy(tmppack, &buf[p], 188); | |
487 | if (tmppack[0] == 0xB8) | |
488 | tmppack[0] = 0x47; | |
1da177e4 LT |
489 | dvb_dmx_swfilter_packet(demux, tmppack); |
490 | p += 204; | |
491 | } else { | |
dad4a730 AO |
492 | i = count - p; |
493 | memcpy(demux->tsbuf, &buf[p], i); | |
494 | demux->tsbufp = i; | |
1da177e4 LT |
495 | goto bailout; |
496 | } | |
497 | } else { | |
498 | p++; | |
499 | } | |
500 | } | |
501 | ||
502 | bailout: | |
28100165 | 503 | spin_unlock(&demux->lock); |
1da177e4 | 504 | } |
1da177e4 | 505 | |
dad4a730 | 506 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
1da177e4 | 507 | |
dad4a730 | 508 | static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) |
1da177e4 LT |
509 | { |
510 | int i; | |
511 | ||
dad4a730 | 512 | for (i = 0; i < demux->filternum; i++) |
1da177e4 LT |
513 | if (demux->filter[i].state == DMX_STATE_FREE) |
514 | break; | |
515 | ||
516 | if (i == demux->filternum) | |
517 | return NULL; | |
518 | ||
519 | demux->filter[i].state = DMX_STATE_ALLOCATED; | |
520 | ||
521 | return &demux->filter[i]; | |
522 | } | |
523 | ||
dad4a730 | 524 | static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) |
1da177e4 LT |
525 | { |
526 | int i; | |
527 | ||
dad4a730 | 528 | for (i = 0; i < demux->feednum; i++) |
1da177e4 LT |
529 | if (demux->feed[i].state == DMX_STATE_FREE) |
530 | break; | |
531 | ||
532 | if (i == demux->feednum) | |
533 | return NULL; | |
534 | ||
535 | demux->feed[i].state = DMX_STATE_ALLOCATED; | |
536 | ||
537 | return &demux->feed[i]; | |
538 | } | |
539 | ||
540 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) | |
541 | { | |
542 | struct dvb_demux_feed *entry; | |
543 | ||
544 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) | |
545 | if (entry == feed) | |
546 | return 1; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) | |
552 | { | |
553 | spin_lock_irq(&feed->demux->lock); | |
554 | if (dvb_demux_feed_find(feed)) { | |
555 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 556 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
557 | goto out; |
558 | } | |
559 | ||
560 | list_add(&feed->list_head, &feed->demux->feed_list); | |
561 | out: | |
562 | spin_unlock_irq(&feed->demux->lock); | |
563 | } | |
564 | ||
565 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) | |
566 | { | |
567 | spin_lock_irq(&feed->demux->lock); | |
568 | if (!(dvb_demux_feed_find(feed))) { | |
569 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", | |
46b4f7c1 | 570 | __func__, feed->type, feed->state, feed->pid); |
1da177e4 LT |
571 | goto out; |
572 | } | |
573 | ||
574 | list_del(&feed->list_head); | |
575 | out: | |
576 | spin_unlock_irq(&feed->demux->lock); | |
577 | } | |
578 | ||
dad4a730 AO |
579 | static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, |
580 | enum dmx_ts_pes pes_type, | |
581 | size_t circular_buffer_size, struct timespec timeout) | |
1da177e4 | 582 | { |
dad4a730 | 583 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
584 | struct dvb_demux *demux = feed->demux; |
585 | ||
586 | if (pid > DMX_MAX_PID) | |
587 | return -EINVAL; | |
588 | ||
3593cab5 | 589 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
590 | return -ERESTARTSYS; |
591 | ||
592 | if (ts_type & TS_DECODER) { | |
593 | if (pes_type >= DMX_TS_PES_OTHER) { | |
3593cab5 | 594 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
595 | return -EINVAL; |
596 | } | |
597 | ||
598 | if (demux->pesfilter[pes_type] && | |
599 | demux->pesfilter[pes_type] != feed) { | |
3593cab5 | 600 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
601 | return -EINVAL; |
602 | } | |
603 | ||
604 | demux->pesfilter[pes_type] = feed; | |
605 | demux->pids[pes_type] = pid; | |
606 | } | |
607 | ||
608 | dvb_demux_feed_add(feed); | |
609 | ||
610 | feed->pid = pid; | |
611 | feed->buffer_size = circular_buffer_size; | |
1da177e4 | 612 | feed->timeout = timeout; |
1da177e4 LT |
613 | feed->ts_type = ts_type; |
614 | feed->pes_type = pes_type; | |
615 | ||
1da177e4 LT |
616 | if (feed->buffer_size) { |
617 | #ifdef NOBUFS | |
dad4a730 | 618 | feed->buffer = NULL; |
1da177e4 LT |
619 | #else |
620 | feed->buffer = vmalloc(feed->buffer_size); | |
621 | if (!feed->buffer) { | |
3593cab5 | 622 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
623 | return -ENOMEM; |
624 | } | |
625 | #endif | |
626 | } | |
627 | ||
628 | feed->state = DMX_STATE_READY; | |
3593cab5 | 629 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
630 | |
631 | return 0; | |
632 | } | |
633 | ||
dad4a730 | 634 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 635 | { |
dad4a730 | 636 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
637 | struct dvb_demux *demux = feed->demux; |
638 | int ret; | |
639 | ||
3593cab5 | 640 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
641 | return -ERESTARTSYS; |
642 | ||
643 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { | |
3593cab5 | 644 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
645 | return -EINVAL; |
646 | } | |
647 | ||
648 | if (!demux->start_feed) { | |
3593cab5 | 649 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
650 | return -ENODEV; |
651 | } | |
652 | ||
653 | if ((ret = demux->start_feed(feed)) < 0) { | |
3593cab5 | 654 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
655 | return ret; |
656 | } | |
657 | ||
658 | spin_lock_irq(&demux->lock); | |
659 | ts_feed->is_filtering = 1; | |
660 | feed->state = DMX_STATE_GO; | |
661 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 662 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
dad4a730 | 667 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) |
1da177e4 | 668 | { |
dad4a730 | 669 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; |
1da177e4 LT |
670 | struct dvb_demux *demux = feed->demux; |
671 | int ret; | |
672 | ||
c2788502 | 673 | mutex_lock(&demux->mutex); |
1da177e4 LT |
674 | |
675 | if (feed->state < DMX_STATE_GO) { | |
3593cab5 | 676 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
677 | return -EINVAL; |
678 | } | |
679 | ||
680 | if (!demux->stop_feed) { | |
3593cab5 | 681 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
682 | return -ENODEV; |
683 | } | |
684 | ||
685 | ret = demux->stop_feed(feed); | |
686 | ||
687 | spin_lock_irq(&demux->lock); | |
688 | ts_feed->is_filtering = 0; | |
689 | feed->state = DMX_STATE_ALLOCATED; | |
690 | spin_unlock_irq(&demux->lock); | |
3593cab5 | 691 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
692 | |
693 | return ret; | |
694 | } | |
695 | ||
dad4a730 AO |
696 | static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, |
697 | struct dmx_ts_feed **ts_feed, | |
698 | dmx_ts_cb callback) | |
1da177e4 | 699 | { |
dad4a730 | 700 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
1da177e4 LT |
701 | struct dvb_demux_feed *feed; |
702 | ||
3593cab5 | 703 | if (mutex_lock_interruptible(&demux->mutex)) |
1da177e4 LT |
704 | return -ERESTARTSYS; |
705 | ||
706 | if (!(feed = dvb_dmx_feed_alloc(demux))) { | |
3593cab5 | 707 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
708 | return -EBUSY; |
709 | } | |
710 | ||
711 | feed->type = DMX_TYPE_TS; | |
712 | feed->cb.ts = callback; | |
713 | feed->demux = demux; | |
714 | feed->pid = 0xffff; | |
715 | feed->peslen = 0xfffa; | |
716 | feed->buffer = NULL; | |
717 | ||
718 | (*ts_feed) = &feed->feed.ts; | |
719 | (*ts_feed)->parent = dmx; | |
720 | (*ts_feed)->priv = NULL; | |
721 | (*ts_feed)->is_filtering = 0; | |
722 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; | |
723 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; | |
724 | (*ts_feed)->set = dmx_ts_feed_set; | |
725 | ||
1da177e4 LT |
726 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
727 | feed->state = DMX_STATE_FREE; | |
3593cab5 | 728 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
729 | return -EBUSY; |
730 | } | |
731 | ||
732 | feed->filter->type = DMX_TYPE_TS; | |
733 | feed->filter->feed = feed; | |
734 | feed->filter->state = DMX_STATE_READY; | |
735 | ||
3593cab5 | 736 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
737 | |
738 | return 0; | |
739 | } | |
740 | ||
dad4a730 AO |
741 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, |
742 | struct dmx_ts_feed *ts_feed) | |
1da177e4 | 743 | { |
dad4a730 AO |
744 | struct dvb_demux *demux = (struct dvb_demux *)dmx; |
745 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; | |
1da177e4 | 746 | |
c2788502 | 747 | mutex_lock(&demux->mutex); |
1da177e4 LT |
748 | |
749 | if (feed->state == DMX_STATE_FREE) { | |
3593cab5 | 750 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
751 | return -EINVAL; |
752 | } | |
1da177e4 LT |
753 | #ifndef NOBUFS |
754 | vfree(feed->buffer); | |
dad4a730 | 755 | feed->buffer = NULL; |
1da177e4 LT |
756 | #endif |
757 | ||
758 | feed->state = DMX_STATE_FREE; | |
759 | feed->filter->state = DMX_STATE_FREE; | |
760 | ||
761 | dvb_demux_feed_del(feed); | |
762 | ||
763 | feed->pid = 0xffff; | |
764 | ||
765 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) | |
766 | demux->pesfilter[feed->pes_type] = NULL; | |
767 | ||
3593cab5 | 768 | mutex_unlock(&demux->mutex); |
1da177e4 LT |
769 | return 0; |
770 | } | |
771 | ||
1da177e4 LT |
772 | /****************************************************************************** |
773 | * dmx_section_feed API calls | |
774 | ******************************************************************************/ | |
775 | ||
dad4a730 AO |
776 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, |
777 | struct dmx_section_filter **filter) | |
1da177e4 | 778 | { |
dad4a730 | 779 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
780 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
781 | struct dvb_demux_filter *dvbdmxfilter; | |
782 | ||
3593cab5 | 783 | if (mutex_lock_interruptible(&dvbdemux->mutex)) |
1da177e4 LT |
784 | return -ERESTARTSYS; |
785 | ||
786 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); | |
787 | if (!dvbdmxfilter) { | |
3593cab5 | 788 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
789 | return -EBUSY; |
790 | } | |
791 | ||
792 | spin_lock_irq(&dvbdemux->lock); | |
793 | *filter = &dvbdmxfilter->filter; | |
794 | (*filter)->parent = feed; | |
795 | (*filter)->priv = NULL; | |
796 | dvbdmxfilter->feed = dvbdmxfeed; | |
797 | dvbdmxfilter->type = DMX_TYPE_SEC; | |
798 | dvbdmxfilter->state = DMX_STATE_READY; | |
799 | dvbdmxfilter->next = dvbdmxfeed->filter; | |
800 | dvbdmxfeed->filter = dvbdmxfilter; | |
801 | spin_unlock_irq(&dvbdemux->lock); | |
802 | ||
3593cab5 | 803 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
804 | return 0; |
805 | } | |
806 | ||
dad4a730 AO |
807 | static int dmx_section_feed_set(struct dmx_section_feed *feed, |
808 | u16 pid, size_t circular_buffer_size, | |
809 | int check_crc) | |
1da177e4 | 810 | { |
dad4a730 | 811 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
812 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
813 | ||
814 | if (pid > 0x1fff) | |
815 | return -EINVAL; | |
816 | ||
3593cab5 | 817 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
818 | return -ERESTARTSYS; |
819 | ||
820 | dvb_demux_feed_add(dvbdmxfeed); | |
821 | ||
822 | dvbdmxfeed->pid = pid; | |
823 | dvbdmxfeed->buffer_size = circular_buffer_size; | |
1da177e4 LT |
824 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
825 | ||
826 | #ifdef NOBUFS | |
827 | dvbdmxfeed->buffer = NULL; | |
828 | #else | |
dad4a730 | 829 | dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size); |
1da177e4 | 830 | if (!dvbdmxfeed->buffer) { |
3593cab5 | 831 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
832 | return -ENOMEM; |
833 | } | |
834 | #endif | |
835 | ||
836 | dvbdmxfeed->state = DMX_STATE_READY; | |
3593cab5 | 837 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
838 | return 0; |
839 | } | |
840 | ||
1da177e4 LT |
841 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
842 | { | |
843 | int i; | |
844 | struct dvb_demux_filter *f; | |
845 | struct dmx_section_filter *sf; | |
846 | u8 mask, mode, doneq; | |
847 | ||
dad4a730 | 848 | if (!(f = dvbdmxfeed->filter)) |
1da177e4 LT |
849 | return; |
850 | do { | |
851 | sf = &f->filter; | |
852 | doneq = 0; | |
dad4a730 | 853 | for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { |
1da177e4 LT |
854 | mode = sf->filter_mode[i]; |
855 | mask = sf->filter_mask[i]; | |
856 | f->maskandmode[i] = mask & mode; | |
857 | doneq |= f->maskandnotmode[i] = mask & ~mode; | |
858 | } | |
859 | f->doneq = doneq ? 1 : 0; | |
860 | } while ((f = f->next)); | |
861 | } | |
862 | ||
1da177e4 LT |
863 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
864 | { | |
dad4a730 | 865 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
866 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
867 | int ret; | |
868 | ||
3593cab5 | 869 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
870 | return -ERESTARTSYS; |
871 | ||
872 | if (feed->is_filtering) { | |
3593cab5 | 873 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
874 | return -EBUSY; |
875 | } | |
876 | ||
877 | if (!dvbdmxfeed->filter) { | |
3593cab5 | 878 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
879 | return -EINVAL; |
880 | } | |
881 | ||
882 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
883 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
884 | dvbdmxfeed->feed.sec.secbufp = 0; | |
885 | dvbdmxfeed->feed.sec.seclen = 0; | |
886 | ||
887 | if (!dvbdmx->start_feed) { | |
3593cab5 | 888 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
889 | return -ENODEV; |
890 | } | |
891 | ||
892 | prepare_secfilters(dvbdmxfeed); | |
893 | ||
894 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { | |
3593cab5 | 895 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
896 | return ret; |
897 | } | |
898 | ||
899 | spin_lock_irq(&dvbdmx->lock); | |
900 | feed->is_filtering = 1; | |
901 | dvbdmxfeed->state = DMX_STATE_GO; | |
902 | spin_unlock_irq(&dvbdmx->lock); | |
903 | ||
3593cab5 | 904 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
905 | return 0; |
906 | } | |
907 | ||
dad4a730 | 908 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) |
1da177e4 | 909 | { |
dad4a730 | 910 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1da177e4 LT |
911 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
912 | int ret; | |
913 | ||
c2788502 | 914 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
915 | |
916 | if (!dvbdmx->stop_feed) { | |
3593cab5 | 917 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
918 | return -ENODEV; |
919 | } | |
920 | ||
921 | ret = dvbdmx->stop_feed(dvbdmxfeed); | |
922 | ||
923 | spin_lock_irq(&dvbdmx->lock); | |
924 | dvbdmxfeed->state = DMX_STATE_READY; | |
925 | feed->is_filtering = 0; | |
926 | spin_unlock_irq(&dvbdmx->lock); | |
927 | ||
3593cab5 | 928 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
929 | return ret; |
930 | } | |
931 | ||
1da177e4 | 932 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
dad4a730 | 933 | struct dmx_section_filter *filter) |
1da177e4 | 934 | { |
dad4a730 AO |
935 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; |
936 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; | |
1da177e4 LT |
937 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
938 | ||
c2788502 | 939 | mutex_lock(&dvbdmx->mutex); |
1da177e4 LT |
940 | |
941 | if (dvbdmxfilter->feed != dvbdmxfeed) { | |
3593cab5 | 942 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
943 | return -EINVAL; |
944 | } | |
945 | ||
946 | if (feed->is_filtering) | |
947 | feed->stop_filtering(feed); | |
948 | ||
949 | spin_lock_irq(&dvbdmx->lock); | |
950 | f = dvbdmxfeed->filter; | |
951 | ||
952 | if (f == dvbdmxfilter) { | |
953 | dvbdmxfeed->filter = dvbdmxfilter->next; | |
954 | } else { | |
dad4a730 | 955 | while (f->next != dvbdmxfilter) |
1da177e4 LT |
956 | f = f->next; |
957 | f->next = f->next->next; | |
958 | } | |
959 | ||
960 | dvbdmxfilter->state = DMX_STATE_FREE; | |
961 | spin_unlock_irq(&dvbdmx->lock); | |
3593cab5 | 962 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
963 | return 0; |
964 | } | |
965 | ||
966 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, | |
967 | struct dmx_section_feed **feed, | |
968 | dmx_section_cb callback) | |
969 | { | |
dad4a730 | 970 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; |
1da177e4 LT |
971 | struct dvb_demux_feed *dvbdmxfeed; |
972 | ||
3593cab5 | 973 | if (mutex_lock_interruptible(&dvbdmx->mutex)) |
1da177e4 LT |
974 | return -ERESTARTSYS; |
975 | ||
976 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { | |
3593cab5 | 977 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
978 | return -EBUSY; |
979 | } | |
980 | ||
981 | dvbdmxfeed->type = DMX_TYPE_SEC; | |
982 | dvbdmxfeed->cb.sec = callback; | |
983 | dvbdmxfeed->demux = dvbdmx; | |
984 | dvbdmxfeed->pid = 0xffff; | |
985 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; | |
986 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; | |
987 | dvbdmxfeed->feed.sec.tsfeedp = 0; | |
988 | dvbdmxfeed->filter = NULL; | |
989 | dvbdmxfeed->buffer = NULL; | |
990 | ||
dad4a730 | 991 | (*feed) = &dvbdmxfeed->feed.sec; |
1da177e4 LT |
992 | (*feed)->is_filtering = 0; |
993 | (*feed)->parent = demux; | |
994 | (*feed)->priv = NULL; | |
995 | ||
996 | (*feed)->set = dmx_section_feed_set; | |
997 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; | |
998 | (*feed)->start_filtering = dmx_section_feed_start_filtering; | |
999 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; | |
1000 | (*feed)->release_filter = dmx_section_feed_release_filter; | |
1001 | ||
3593cab5 | 1002 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1003 | return 0; |
1004 | } | |
1005 | ||
1006 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, | |
1007 | struct dmx_section_feed *feed) | |
1008 | { | |
dad4a730 AO |
1009 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; |
1010 | struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; | |
1da177e4 | 1011 | |
c2788502 | 1012 | mutex_lock(&dvbdmx->mutex); |
1da177e4 | 1013 | |
dad4a730 | 1014 | if (dvbdmxfeed->state == DMX_STATE_FREE) { |
3593cab5 | 1015 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1016 | return -EINVAL; |
1017 | } | |
1018 | #ifndef NOBUFS | |
1019 | vfree(dvbdmxfeed->buffer); | |
dad4a730 | 1020 | dvbdmxfeed->buffer = NULL; |
1da177e4 | 1021 | #endif |
dad4a730 | 1022 | dvbdmxfeed->state = DMX_STATE_FREE; |
1da177e4 LT |
1023 | |
1024 | dvb_demux_feed_del(dvbdmxfeed); | |
1025 | ||
1026 | dvbdmxfeed->pid = 0xffff; | |
1027 | ||
3593cab5 | 1028 | mutex_unlock(&dvbdmx->mutex); |
1da177e4 LT |
1029 | return 0; |
1030 | } | |
1031 | ||
1da177e4 LT |
1032 | /****************************************************************************** |
1033 | * dvb_demux kernel data API calls | |
1034 | ******************************************************************************/ | |
1035 | ||
1036 | static int dvbdmx_open(struct dmx_demux *demux) | |
1037 | { | |
dad4a730 | 1038 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1039 | |
1040 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) | |
1041 | return -EUSERS; | |
1042 | ||
1043 | dvbdemux->users++; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1da177e4 LT |
1047 | static int dvbdmx_close(struct dmx_demux *demux) |
1048 | { | |
dad4a730 | 1049 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1050 | |
1051 | if (dvbdemux->users == 0) | |
1052 | return -ENODEV; | |
1053 | ||
1054 | dvbdemux->users--; | |
1055 | //FIXME: release any unneeded resources if users==0 | |
1056 | return 0; | |
1057 | } | |
1058 | ||
947a0800 | 1059 | static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) |
1da177e4 | 1060 | { |
dad4a730 | 1061 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
947a0800 | 1062 | void *p; |
1da177e4 LT |
1063 | |
1064 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) | |
1065 | return -EINVAL; | |
1066 | ||
947a0800 AV |
1067 | p = kmalloc(count, GFP_USER); |
1068 | if (!p) | |
1069 | return -ENOMEM; | |
1070 | if (copy_from_user(p, buf, count)) { | |
1071 | kfree(p); | |
1072 | return -EFAULT; | |
1073 | } | |
1074 | if (mutex_lock_interruptible(&dvbdemux->mutex)) { | |
1075 | kfree(p); | |
1da177e4 | 1076 | return -ERESTARTSYS; |
947a0800 AV |
1077 | } |
1078 | dvb_dmx_swfilter(dvbdemux, p, count); | |
1079 | kfree(p); | |
3593cab5 | 1080 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1081 | |
1082 | if (signal_pending(current)) | |
1083 | return -EINTR; | |
1084 | return count; | |
1085 | } | |
1086 | ||
dad4a730 AO |
1087 | static int dvbdmx_add_frontend(struct dmx_demux *demux, |
1088 | struct dmx_frontend *frontend) | |
1da177e4 | 1089 | { |
dad4a730 | 1090 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1091 | struct list_head *head = &dvbdemux->frontend_list; |
1092 | ||
1093 | list_add(&(frontend->connectivity_list), head); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
dad4a730 AO |
1098 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, |
1099 | struct dmx_frontend *frontend) | |
1da177e4 | 1100 | { |
dad4a730 | 1101 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1102 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
1103 | ||
dad4a730 | 1104 | list_for_each_safe(pos, n, head) { |
1da177e4 LT |
1105 | if (DMX_FE_ENTRY(pos) == frontend) { |
1106 | list_del(pos); | |
1107 | return 0; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | return -ENODEV; | |
1112 | } | |
1113 | ||
dad4a730 | 1114 | static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) |
1da177e4 | 1115 | { |
dad4a730 | 1116 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1117 | |
1118 | if (list_empty(&dvbdemux->frontend_list)) | |
1119 | return NULL; | |
dad4a730 | 1120 | |
1da177e4 LT |
1121 | return &dvbdemux->frontend_list; |
1122 | } | |
1123 | ||
dad4a730 AO |
1124 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, |
1125 | struct dmx_frontend *frontend) | |
1da177e4 | 1126 | { |
dad4a730 | 1127 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 LT |
1128 | |
1129 | if (demux->frontend) | |
1130 | return -EINVAL; | |
1131 | ||
c2788502 | 1132 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1133 | |
1134 | demux->frontend = frontend; | |
3593cab5 | 1135 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1136 | return 0; |
1137 | } | |
1138 | ||
1da177e4 LT |
1139 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
1140 | { | |
dad4a730 | 1141 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1142 | |
c2788502 | 1143 | mutex_lock(&dvbdemux->mutex); |
1da177e4 LT |
1144 | |
1145 | demux->frontend = NULL; | |
3593cab5 | 1146 | mutex_unlock(&dvbdemux->mutex); |
1da177e4 LT |
1147 | return 0; |
1148 | } | |
1149 | ||
dad4a730 | 1150 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) |
1da177e4 | 1151 | { |
dad4a730 | 1152 | struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; |
1da177e4 | 1153 | |
dad4a730 | 1154 | memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); |
1da177e4 LT |
1155 | return 0; |
1156 | } | |
1157 | ||
1da177e4 LT |
1158 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
1159 | { | |
93653467 | 1160 | int i; |
1da177e4 LT |
1161 | struct dmx_demux *dmx = &dvbdemux->dmx; |
1162 | ||
1163 | dvbdemux->users = 0; | |
dad4a730 | 1164 | dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); |
1da177e4 LT |
1165 | |
1166 | if (!dvbdemux->filter) | |
1167 | return -ENOMEM; | |
1168 | ||
dad4a730 | 1169 | dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); |
1da177e4 LT |
1170 | if (!dvbdemux->feed) { |
1171 | vfree(dvbdemux->filter); | |
1172 | return -ENOMEM; | |
1173 | } | |
dad4a730 | 1174 | for (i = 0; i < dvbdemux->filternum; i++) { |
1da177e4 LT |
1175 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
1176 | dvbdemux->filter[i].index = i; | |
1177 | } | |
dad4a730 | 1178 | for (i = 0; i < dvbdemux->feednum; i++) { |
1da177e4 LT |
1179 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
1180 | dvbdemux->feed[i].index = i; | |
1181 | } | |
db574d7d AO |
1182 | |
1183 | INIT_LIST_HEAD(&dvbdemux->frontend_list); | |
1184 | ||
dad4a730 | 1185 | for (i = 0; i < DMX_TS_PES_OTHER; i++) { |
1da177e4 LT |
1186 | dvbdemux->pesfilter[i] = NULL; |
1187 | dvbdemux->pids[i] = 0xffff; | |
1188 | } | |
1189 | ||
1190 | INIT_LIST_HEAD(&dvbdemux->feed_list); | |
1191 | ||
1192 | dvbdemux->playing = 0; | |
1193 | dvbdemux->recording = 0; | |
1194 | dvbdemux->tsbufp = 0; | |
1195 | ||
1196 | if (!dvbdemux->check_crc32) | |
1197 | dvbdemux->check_crc32 = dvb_dmx_crc32; | |
1198 | ||
dad4a730 AO |
1199 | if (!dvbdemux->memcopy) |
1200 | dvbdemux->memcopy = dvb_dmx_memcopy; | |
1da177e4 LT |
1201 | |
1202 | dmx->frontend = NULL; | |
dad4a730 | 1203 | dmx->priv = dvbdemux; |
1da177e4 LT |
1204 | dmx->open = dvbdmx_open; |
1205 | dmx->close = dvbdmx_close; | |
1206 | dmx->write = dvbdmx_write; | |
1207 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; | |
1208 | dmx->release_ts_feed = dvbdmx_release_ts_feed; | |
1209 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; | |
1210 | dmx->release_section_feed = dvbdmx_release_section_feed; | |
1211 | ||
1da177e4 LT |
1212 | dmx->add_frontend = dvbdmx_add_frontend; |
1213 | dmx->remove_frontend = dvbdmx_remove_frontend; | |
1214 | dmx->get_frontends = dvbdmx_get_frontends; | |
1215 | dmx->connect_frontend = dvbdmx_connect_frontend; | |
1216 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; | |
1217 | dmx->get_pes_pids = dvbdmx_get_pes_pids; | |
1218 | ||
3593cab5 | 1219 | mutex_init(&dvbdemux->mutex); |
1da177e4 LT |
1220 | spin_lock_init(&dvbdemux->lock); |
1221 | ||
1da177e4 LT |
1222 | return 0; |
1223 | } | |
1da177e4 | 1224 | |
dad4a730 | 1225 | EXPORT_SYMBOL(dvb_dmx_init); |
1da177e4 | 1226 | |
93653467 | 1227 | void dvb_dmx_release(struct dvb_demux *dvbdemux) |
1da177e4 | 1228 | { |
1da177e4 LT |
1229 | vfree(dvbdemux->filter); |
1230 | vfree(dvbdemux->feed); | |
1da177e4 | 1231 | } |
dad4a730 | 1232 | |
1da177e4 | 1233 | EXPORT_SYMBOL(dvb_dmx_release); |