Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 41 | |
| 42 | static LIST_HEAD(dmx_muxs); |
| 43 | |
| 44 | |
| 45 | static int dmx_register_demux(struct dmx_demux *demux) |
| 46 | { |
| 47 | demux->users = 0; |
| 48 | list_add(&demux->reg_list, &dmx_muxs); |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | static int dmx_unregister_demux(struct dmx_demux* demux) |
| 53 | { |
| 54 | struct list_head *pos, *n, *head=&dmx_muxs; |
| 55 | |
| 56 | list_for_each_safe (pos, n, head) { |
| 57 | if (DMX_DIR_ENTRY(pos) == demux) { |
| 58 | if (demux->users>0) |
| 59 | return -EINVAL; |
| 60 | list_del(pos); |
| 61 | return 0; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | return -ENODEV; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | /****************************************************************************** |
| 70 | * static inlined helper functions |
| 71 | ******************************************************************************/ |
| 72 | |
| 73 | |
| 74 | static inline u16 section_length(const u8 *buf) |
| 75 | { |
| 76 | return 3+((buf[1]&0x0f)<<8)+buf[2]; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | static inline u16 ts_pid(const u8 *buf) |
| 81 | { |
| 82 | return ((buf[1]&0x1f)<<8)+buf[2]; |
| 83 | } |
| 84 | |
| 85 | |
| 86 | static inline u8 payload(const u8 *tsp) |
| 87 | { |
| 88 | if (!(tsp[3] & 0x10)) // no payload? |
| 89 | return 0; |
| 90 | if (tsp[3] & 0x20) { // adaptation field? |
| 91 | if (tsp[4] > 183) // corrupted data? |
| 92 | return 0; |
| 93 | else |
| 94 | return 184-1-tsp[4]; |
| 95 | } |
| 96 | return 184; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | static u32 dvb_dmx_crc32 (struct dvb_demux_feed *f, const u8 *src, size_t len) |
| 101 | { |
| 102 | return (f->feed.sec.crc_val = crc32_be (f->feed.sec.crc_val, src, len)); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | static void dvb_dmx_memcopy (struct dvb_demux_feed *f, u8 *d, const u8 *s, size_t len) |
| 107 | { |
| 108 | memcpy (d, s, len); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | /****************************************************************************** |
| 113 | * Software filter functions |
| 114 | ******************************************************************************/ |
| 115 | |
| 116 | static inline int dvb_dmx_swfilter_payload (struct dvb_demux_feed *feed, const u8 *buf) |
| 117 | { |
| 118 | int count = payload(buf); |
| 119 | int p; |
| 120 | //int ccok; |
| 121 | //u8 cc; |
| 122 | |
| 123 | if (count == 0) |
| 124 | return -1; |
| 125 | |
| 126 | p = 188-count; |
| 127 | |
| 128 | /* |
| 129 | cc=buf[3]&0x0f; |
| 130 | ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0; |
| 131 | dvbdmxfeed->cc=cc; |
| 132 | if (!ccok) |
| 133 | printk("missed packet!\n"); |
| 134 | */ |
| 135 | |
| 136 | if (buf[1] & 0x40) // PUSI ? |
| 137 | feed->peslen = 0xfffa; |
| 138 | |
| 139 | feed->peslen += count; |
| 140 | |
| 141 | return feed->cb.ts (&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); |
| 142 | } |
| 143 | |
| 144 | |
| 145 | static int dvb_dmx_swfilter_sectionfilter (struct dvb_demux_feed *feed, |
| 146 | struct dvb_demux_filter *f) |
| 147 | { |
| 148 | u8 neq = 0; |
| 149 | int i; |
| 150 | |
| 151 | for (i=0; i<DVB_DEMUX_MASK_MAX; i++) { |
| 152 | u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; |
| 153 | |
| 154 | if (f->maskandmode[i] & xor) |
| 155 | return 0; |
| 156 | |
| 157 | neq |= f->maskandnotmode[i] & xor; |
| 158 | } |
| 159 | |
| 160 | if (f->doneq && !neq) |
| 161 | return 0; |
| 162 | |
| 163 | return feed->cb.sec (feed->feed.sec.secbuf, feed->feed.sec.seclen, |
| 164 | NULL, 0, &f->filter, DMX_OK); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | static inline int dvb_dmx_swfilter_section_feed (struct dvb_demux_feed *feed) |
| 169 | { |
| 170 | struct dvb_demux *demux = feed->demux; |
| 171 | struct dvb_demux_filter *f = feed->filter; |
| 172 | struct dmx_section_feed *sec = &feed->feed.sec; |
| 173 | int section_syntax_indicator; |
| 174 | |
| 175 | if (!sec->is_filtering) |
| 176 | return 0; |
| 177 | |
| 178 | if (!f) |
| 179 | return 0; |
| 180 | |
| 181 | if (sec->check_crc) { |
| 182 | section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); |
| 183 | if (section_syntax_indicator && |
| 184 | demux->check_crc32(feed, sec->secbuf, sec->seclen)) |
| 185 | return -1; |
| 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 | |
| 198 | |
| 199 | static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) |
| 200 | { |
| 201 | struct dmx_section_feed *sec = &feed->feed.sec; |
| 202 | |
| 203 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
| 204 | if(sec->secbufp < sec->tsfeedp) |
| 205 | { |
| 206 | int i, n = sec->tsfeedp - sec->secbufp; |
| 207 | |
| 208 | /* section padding is done with 0xff bytes entirely. |
| 209 | ** due to speed reasons, we won't check all of them |
| 210 | ** but just first and last |
| 211 | */ |
| 212 | if(sec->secbuf[0] != 0xff || sec->secbuf[n-1] != 0xff) |
| 213 | { |
| 214 | printk("dvb_demux.c section ts padding loss: %d/%d\n", |
| 215 | n, sec->tsfeedp); |
| 216 | printk("dvb_demux.c pad data:"); |
| 217 | for(i = 0; i < n; i++) |
| 218 | printk(" %02x", sec->secbuf[i]); |
| 219 | printk("\n"); |
| 220 | } |
| 221 | } |
| 222 | #endif |
| 223 | |
| 224 | sec->tsfeedp = sec->secbufp = sec->seclen = 0; |
| 225 | sec->secbuf = sec->secbuf_base; |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | ** Losless Section Demux 1.4.1 by Emard |
| 230 | ** Valsecchi Patrick: |
| 231 | ** - middle of section A (no PUSI) |
| 232 | ** - end of section A and start of section B |
| 233 | ** (with PUSI pointing to the start of the second section) |
| 234 | ** |
| 235 | ** In this case, without feed->pusi_seen you'll receive a garbage section |
| 236 | ** consisting of the end of section A. Basically because tsfeedp |
| 237 | ** is incemented and the use=0 condition is not raised |
| 238 | ** when the second packet arrives. |
| 239 | ** |
| 240 | ** Fix: |
| 241 | ** when demux is started, let feed->pusi_seen = 0 to |
| 242 | ** prevent initial feeding of garbage from the end of |
| 243 | ** previous section. When you for the first time see PUSI=1 |
| 244 | ** then set feed->pusi_seen = 1 |
| 245 | */ |
| 246 | static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, const u8 *buf, u8 len) |
| 247 | { |
| 248 | struct dvb_demux *demux = feed->demux; |
| 249 | struct dmx_section_feed *sec = &feed->feed.sec; |
| 250 | u16 limit, seclen, n; |
| 251 | |
| 252 | if(sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) |
| 253 | return 0; |
| 254 | |
| 255 | if(sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) |
| 256 | { |
| 257 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
| 258 | printk("dvb_demux.c section buffer full loss: %d/%d\n", |
| 259 | sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, DMX_MAX_SECFEED_SIZE); |
| 260 | #endif |
| 261 | len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; |
| 262 | } |
| 263 | |
| 264 | if(len <= 0) |
| 265 | return 0; |
| 266 | |
| 267 | demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); |
| 268 | sec->tsfeedp += len; |
| 269 | |
| 270 | /* ----------------------------------------------------- |
| 271 | ** Dump all the sections we can find in the data (Emard) |
| 272 | */ |
| 273 | |
| 274 | limit = sec->tsfeedp; |
| 275 | if(limit > DMX_MAX_SECFEED_SIZE) |
| 276 | return -1; /* internal error should never happen */ |
| 277 | |
| 278 | /* to be sure always set secbuf */ |
| 279 | sec->secbuf = sec->secbuf_base + sec->secbufp; |
| 280 | |
| 281 | for(n = 0; sec->secbufp + 2 < limit; n++) |
| 282 | { |
| 283 | seclen = section_length(sec->secbuf); |
| 284 | if(seclen <= 0 || seclen > DMX_MAX_SECFEED_SIZE |
| 285 | || seclen + sec->secbufp > limit) |
| 286 | return 0; |
| 287 | sec->seclen = seclen; |
| 288 | sec->crc_val = ~0; |
| 289 | /* dump [secbuf .. secbuf+seclen) */ |
| 290 | if(feed->pusi_seen) |
| 291 | dvb_dmx_swfilter_section_feed(feed); |
| 292 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
| 293 | else |
| 294 | printk("dvb_demux.c pusi not seen, discarding section data\n"); |
| 295 | #endif |
| 296 | sec->secbufp += seclen; /* secbufp and secbuf moving together is */ |
| 297 | sec->secbuf += seclen; /* redundand but saves pointer arithmetic */ |
| 298 | } |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | |
| 304 | static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, const u8 *buf) |
| 305 | { |
| 306 | u8 p, count; |
| 307 | int ccok, dc_i = 0; |
| 308 | u8 cc; |
| 309 | |
| 310 | count = payload(buf); |
| 311 | |
| 312 | if (count == 0) /* count == 0 if no payload or out of range */ |
| 313 | return -1; |
| 314 | |
| 315 | p = 188 - count; /* payload start */ |
| 316 | |
| 317 | cc = buf[3] & 0x0f; |
| 318 | ccok = ((feed->cc + 1) & 0x0f) == cc; |
| 319 | feed->cc = cc; |
| 320 | |
| 321 | if (buf[3] & 0x20) { |
| 322 | /* adaption field present, check for discontinuity_indicator */ |
| 323 | if ((buf[4] > 0) && (buf[5] & 0x80)) |
| 324 | dc_i = 1; |
| 325 | } |
| 326 | |
| 327 | if (!ccok || dc_i) { |
| 328 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
| 329 | printk("dvb_demux.c discontinuity detected %d bytes lost\n", count); |
| 330 | /* those bytes under sume circumstances will again be reported |
| 331 | ** in the following dvb_dmx_swfilter_section_new |
| 332 | */ |
| 333 | #endif |
| 334 | /* Discontinuity detected. Reset pusi_seen = 0 to |
| 335 | ** stop feeding of suspicious data until next PUSI=1 arrives |
| 336 | */ |
| 337 | feed->pusi_seen = 0; |
| 338 | dvb_dmx_swfilter_section_new(feed); |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | if (buf[1] & 0x40) { |
| 343 | // PUSI=1 (is set), section boundary is here |
| 344 | if (count > 1 && buf[p] < count) { |
| 345 | const u8 *before = buf+p+1; |
| 346 | u8 before_len = buf[p]; |
| 347 | const u8 *after = before+before_len; |
| 348 | u8 after_len = count-1-before_len; |
| 349 | |
| 350 | dvb_dmx_swfilter_section_copy_dump(feed, before, before_len); |
| 351 | /* before start of new section, set pusi_seen = 1 */ |
| 352 | feed->pusi_seen = 1; |
| 353 | dvb_dmx_swfilter_section_new(feed); |
| 354 | dvb_dmx_swfilter_section_copy_dump(feed, after, after_len); |
| 355 | } |
| 356 | #ifdef DVB_DEMUX_SECTION_LOSS_LOG |
| 357 | else |
| 358 | if (count > 0) |
| 359 | printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); |
| 360 | #endif |
| 361 | } else { |
| 362 | // PUSI=0 (is not set), no section boundary |
| 363 | const u8 *entire = buf+p; |
| 364 | u8 entire_len = count; |
| 365 | |
| 366 | dvb_dmx_swfilter_section_copy_dump(feed, entire, entire_len); |
| 367 | } |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | |
| 372 | static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, const u8 *buf) |
| 373 | { |
| 374 | switch(feed->type) { |
| 375 | case DMX_TYPE_TS: |
| 376 | if (!feed->feed.ts.is_filtering) |
| 377 | break; |
| 378 | if (feed->ts_type & TS_PACKET) { |
| 379 | if (feed->ts_type & TS_PAYLOAD_ONLY) |
| 380 | dvb_dmx_swfilter_payload(feed, buf); |
| 381 | else |
| 382 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); |
| 383 | } |
| 384 | if (feed->ts_type & TS_DECODER) |
| 385 | if (feed->demux->write_to_decoder) |
| 386 | feed->demux->write_to_decoder(feed, buf, 188); |
| 387 | break; |
| 388 | |
| 389 | case DMX_TYPE_SEC: |
| 390 | if (!feed->feed.sec.is_filtering) |
| 391 | break; |
| 392 | if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) |
| 393 | feed->feed.sec.seclen = feed->feed.sec.secbufp=0; |
| 394 | break; |
| 395 | |
| 396 | default: |
| 397 | break; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | #define DVR_FEED(f) \ |
| 402 | (((f)->type == DMX_TYPE_TS) && \ |
| 403 | ((f)->feed.ts.is_filtering) && \ |
| 404 | (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET)) |
| 405 | |
| 406 | static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) |
| 407 | { |
| 408 | struct dvb_demux_feed *feed; |
| 409 | struct list_head *pos, *head=&demux->feed_list; |
| 410 | u16 pid = ts_pid(buf); |
| 411 | int dvr_done = 0; |
| 412 | |
| 413 | list_for_each(pos, head) { |
| 414 | feed = list_entry(pos, struct dvb_demux_feed, list_head); |
| 415 | |
| 416 | if ((feed->pid != pid) && (feed->pid != 0x2000)) |
| 417 | continue; |
| 418 | |
| 419 | /* copy each packet only once to the dvr device, even |
| 420 | * if a PID is in multiple filters (e.g. video + PCR) */ |
| 421 | if ((DVR_FEED(feed)) && (dvr_done++)) |
| 422 | continue; |
| 423 | |
| 424 | if (feed->pid == pid) { |
| 425 | dvb_dmx_swfilter_packet_type(feed, buf); |
| 426 | if (DVR_FEED(feed)) |
| 427 | continue; |
| 428 | } |
| 429 | |
| 430 | if (feed->pid == 0x2000) |
| 431 | feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, size_t count) |
| 436 | { |
| 437 | spin_lock(&demux->lock); |
| 438 | |
| 439 | while (count--) { |
| 440 | if(buf[0] == 0x47) { |
| 441 | dvb_dmx_swfilter_packet(demux, buf); |
| 442 | } |
| 443 | buf += 188; |
| 444 | } |
| 445 | |
| 446 | spin_unlock(&demux->lock); |
| 447 | } |
| 448 | EXPORT_SYMBOL(dvb_dmx_swfilter_packets); |
| 449 | |
| 450 | |
| 451 | void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) |
| 452 | { |
| 453 | int p = 0, i, j; |
| 454 | |
| 455 | spin_lock(&demux->lock); |
| 456 | |
| 457 | if ((i = demux->tsbufp)) { |
| 458 | if (count < (j=188-i)) { |
| 459 | memcpy(&demux->tsbuf[i], buf, count); |
| 460 | demux->tsbufp += count; |
| 461 | goto bailout; |
| 462 | } |
| 463 | memcpy(&demux->tsbuf[i], buf, j); |
| 464 | if (demux->tsbuf[0] == 0x47) |
| 465 | dvb_dmx_swfilter_packet(demux, demux->tsbuf); |
| 466 | demux->tsbufp = 0; |
| 467 | p += j; |
| 468 | } |
| 469 | |
| 470 | while (p < count) { |
| 471 | if (buf[p] == 0x47) { |
| 472 | if (count-p >= 188) { |
| 473 | dvb_dmx_swfilter_packet(demux, buf+p); |
| 474 | p += 188; |
| 475 | } else { |
| 476 | i = count-p; |
| 477 | memcpy(demux->tsbuf, buf+p, i); |
| 478 | demux->tsbufp=i; |
| 479 | goto bailout; |
| 480 | } |
| 481 | } else |
| 482 | p++; |
| 483 | } |
| 484 | |
| 485 | bailout: |
| 486 | spin_unlock(&demux->lock); |
| 487 | } |
| 488 | EXPORT_SYMBOL(dvb_dmx_swfilter); |
| 489 | |
| 490 | void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) |
| 491 | { |
| 492 | int p = 0,i, j; |
| 493 | u8 tmppack[188]; |
| 494 | spin_lock(&demux->lock); |
| 495 | |
| 496 | if ((i = demux->tsbufp)) { |
| 497 | if (count < (j=204-i)) { |
| 498 | memcpy(&demux->tsbuf[i], buf, count); |
| 499 | demux->tsbufp += count; |
| 500 | goto bailout; |
| 501 | } |
| 502 | memcpy(&demux->tsbuf[i], buf, j); |
| 503 | if ((demux->tsbuf[0] == 0x47)|(demux->tsbuf[0]==0xB8)) { |
| 504 | memcpy(tmppack, demux->tsbuf, 188); |
| 505 | if (tmppack[0] == 0xB8) tmppack[0] = 0x47; |
| 506 | dvb_dmx_swfilter_packet(demux, tmppack); |
| 507 | } |
| 508 | demux->tsbufp = 0; |
| 509 | p += j; |
| 510 | } |
| 511 | |
| 512 | while (p < count) { |
| 513 | if ((buf[p] == 0x47)|(buf[p] == 0xB8)) { |
| 514 | if (count-p >= 204) { |
| 515 | memcpy(tmppack, buf+p, 188); |
| 516 | if (tmppack[0] == 0xB8) tmppack[0] = 0x47; |
| 517 | dvb_dmx_swfilter_packet(demux, tmppack); |
| 518 | p += 204; |
| 519 | } else { |
| 520 | i = count-p; |
| 521 | memcpy(demux->tsbuf, buf+p, i); |
| 522 | demux->tsbufp=i; |
| 523 | goto bailout; |
| 524 | } |
| 525 | } else { |
| 526 | p++; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | bailout: |
| 531 | spin_unlock(&demux->lock); |
| 532 | } |
| 533 | EXPORT_SYMBOL(dvb_dmx_swfilter_204); |
| 534 | |
| 535 | |
| 536 | static struct dvb_demux_filter * dvb_dmx_filter_alloc(struct dvb_demux *demux) |
| 537 | { |
| 538 | int i; |
| 539 | |
| 540 | for (i=0; i<demux->filternum; i++) |
| 541 | if (demux->filter[i].state == DMX_STATE_FREE) |
| 542 | break; |
| 543 | |
| 544 | if (i == demux->filternum) |
| 545 | return NULL; |
| 546 | |
| 547 | demux->filter[i].state = DMX_STATE_ALLOCATED; |
| 548 | |
| 549 | return &demux->filter[i]; |
| 550 | } |
| 551 | |
| 552 | static struct dvb_demux_feed * dvb_dmx_feed_alloc(struct dvb_demux *demux) |
| 553 | { |
| 554 | int i; |
| 555 | |
| 556 | for (i=0; i<demux->feednum; i++) |
| 557 | if (demux->feed[i].state == DMX_STATE_FREE) |
| 558 | break; |
| 559 | |
| 560 | if (i == demux->feednum) |
| 561 | return NULL; |
| 562 | |
| 563 | demux->feed[i].state = DMX_STATE_ALLOCATED; |
| 564 | |
| 565 | return &demux->feed[i]; |
| 566 | } |
| 567 | |
| 568 | static int dvb_demux_feed_find(struct dvb_demux_feed *feed) |
| 569 | { |
| 570 | struct dvb_demux_feed *entry; |
| 571 | |
| 572 | list_for_each_entry(entry, &feed->demux->feed_list, list_head) |
| 573 | if (entry == feed) |
| 574 | return 1; |
| 575 | |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static void dvb_demux_feed_add(struct dvb_demux_feed *feed) |
| 580 | { |
| 581 | spin_lock_irq(&feed->demux->lock); |
| 582 | if (dvb_demux_feed_find(feed)) { |
| 583 | printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", |
| 584 | __FUNCTION__, feed->type, feed->state, feed->pid); |
| 585 | goto out; |
| 586 | } |
| 587 | |
| 588 | list_add(&feed->list_head, &feed->demux->feed_list); |
| 589 | out: |
| 590 | spin_unlock_irq(&feed->demux->lock); |
| 591 | } |
| 592 | |
| 593 | static void dvb_demux_feed_del(struct dvb_demux_feed *feed) |
| 594 | { |
| 595 | spin_lock_irq(&feed->demux->lock); |
| 596 | if (!(dvb_demux_feed_find(feed))) { |
| 597 | printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", |
| 598 | __FUNCTION__, feed->type, feed->state, feed->pid); |
| 599 | goto out; |
| 600 | } |
| 601 | |
| 602 | list_del(&feed->list_head); |
| 603 | out: |
| 604 | spin_unlock_irq(&feed->demux->lock); |
| 605 | } |
| 606 | |
| 607 | static int dmx_ts_feed_set (struct dmx_ts_feed* ts_feed, u16 pid, int ts_type, |
| 608 | enum dmx_ts_pes pes_type, size_t callback_length, |
| 609 | size_t circular_buffer_size, int descramble, |
| 610 | struct timespec timeout) |
| 611 | { |
| 612 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; |
| 613 | struct dvb_demux *demux = feed->demux; |
| 614 | |
| 615 | if (pid > DMX_MAX_PID) |
| 616 | return -EINVAL; |
| 617 | |
| 618 | if (down_interruptible (&demux->mutex)) |
| 619 | return -ERESTARTSYS; |
| 620 | |
| 621 | if (ts_type & TS_DECODER) { |
| 622 | if (pes_type >= DMX_TS_PES_OTHER) { |
| 623 | up(&demux->mutex); |
| 624 | return -EINVAL; |
| 625 | } |
| 626 | |
| 627 | if (demux->pesfilter[pes_type] && |
| 628 | demux->pesfilter[pes_type] != feed) { |
| 629 | up(&demux->mutex); |
| 630 | return -EINVAL; |
| 631 | } |
| 632 | |
| 633 | demux->pesfilter[pes_type] = feed; |
| 634 | demux->pids[pes_type] = pid; |
| 635 | } |
| 636 | |
| 637 | dvb_demux_feed_add(feed); |
| 638 | |
| 639 | feed->pid = pid; |
| 640 | feed->buffer_size = circular_buffer_size; |
| 641 | feed->descramble = descramble; |
| 642 | feed->timeout = timeout; |
| 643 | feed->cb_length = callback_length; |
| 644 | feed->ts_type = ts_type; |
| 645 | feed->pes_type = pes_type; |
| 646 | |
| 647 | if (feed->descramble) { |
| 648 | up(&demux->mutex); |
| 649 | return -ENOSYS; |
| 650 | } |
| 651 | |
| 652 | if (feed->buffer_size) { |
| 653 | #ifdef NOBUFS |
| 654 | feed->buffer=NULL; |
| 655 | #else |
| 656 | feed->buffer = vmalloc(feed->buffer_size); |
| 657 | if (!feed->buffer) { |
| 658 | up(&demux->mutex); |
| 659 | return -ENOMEM; |
| 660 | } |
| 661 | #endif |
| 662 | } |
| 663 | |
| 664 | feed->state = DMX_STATE_READY; |
| 665 | up(&demux->mutex); |
| 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | |
| 671 | static int dmx_ts_feed_start_filtering(struct dmx_ts_feed* ts_feed) |
| 672 | { |
| 673 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; |
| 674 | struct dvb_demux *demux = feed->demux; |
| 675 | int ret; |
| 676 | |
| 677 | if (down_interruptible (&demux->mutex)) |
| 678 | return -ERESTARTSYS; |
| 679 | |
| 680 | if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { |
| 681 | up(&demux->mutex); |
| 682 | return -EINVAL; |
| 683 | } |
| 684 | |
| 685 | if (!demux->start_feed) { |
| 686 | up(&demux->mutex); |
| 687 | return -ENODEV; |
| 688 | } |
| 689 | |
| 690 | if ((ret = demux->start_feed(feed)) < 0) { |
| 691 | up(&demux->mutex); |
| 692 | return ret; |
| 693 | } |
| 694 | |
| 695 | spin_lock_irq(&demux->lock); |
| 696 | ts_feed->is_filtering = 1; |
| 697 | feed->state = DMX_STATE_GO; |
| 698 | spin_unlock_irq(&demux->lock); |
| 699 | up(&demux->mutex); |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed* ts_feed) |
| 705 | { |
| 706 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; |
| 707 | struct dvb_demux *demux = feed->demux; |
| 708 | int ret; |
| 709 | |
| 710 | if (down_interruptible (&demux->mutex)) |
| 711 | return -ERESTARTSYS; |
| 712 | |
| 713 | if (feed->state < DMX_STATE_GO) { |
| 714 | up(&demux->mutex); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | |
| 718 | if (!demux->stop_feed) { |
| 719 | up(&demux->mutex); |
| 720 | return -ENODEV; |
| 721 | } |
| 722 | |
| 723 | ret = demux->stop_feed(feed); |
| 724 | |
| 725 | spin_lock_irq(&demux->lock); |
| 726 | ts_feed->is_filtering = 0; |
| 727 | feed->state = DMX_STATE_ALLOCATED; |
| 728 | spin_unlock_irq(&demux->lock); |
| 729 | up(&demux->mutex); |
| 730 | |
| 731 | return ret; |
| 732 | } |
| 733 | |
| 734 | static int dvbdmx_allocate_ts_feed (struct dmx_demux *dmx, struct dmx_ts_feed **ts_feed, |
| 735 | dmx_ts_cb callback) |
| 736 | { |
| 737 | struct dvb_demux *demux = (struct dvb_demux *) dmx; |
| 738 | struct dvb_demux_feed *feed; |
| 739 | |
| 740 | if (down_interruptible (&demux->mutex)) |
| 741 | return -ERESTARTSYS; |
| 742 | |
| 743 | if (!(feed = dvb_dmx_feed_alloc(demux))) { |
| 744 | up(&demux->mutex); |
| 745 | return -EBUSY; |
| 746 | } |
| 747 | |
| 748 | feed->type = DMX_TYPE_TS; |
| 749 | feed->cb.ts = callback; |
| 750 | feed->demux = demux; |
| 751 | feed->pid = 0xffff; |
| 752 | feed->peslen = 0xfffa; |
| 753 | feed->buffer = NULL; |
| 754 | |
| 755 | (*ts_feed) = &feed->feed.ts; |
| 756 | (*ts_feed)->parent = dmx; |
| 757 | (*ts_feed)->priv = NULL; |
| 758 | (*ts_feed)->is_filtering = 0; |
| 759 | (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; |
| 760 | (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; |
| 761 | (*ts_feed)->set = dmx_ts_feed_set; |
| 762 | |
| 763 | |
| 764 | if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { |
| 765 | feed->state = DMX_STATE_FREE; |
| 766 | up(&demux->mutex); |
| 767 | return -EBUSY; |
| 768 | } |
| 769 | |
| 770 | feed->filter->type = DMX_TYPE_TS; |
| 771 | feed->filter->feed = feed; |
| 772 | feed->filter->state = DMX_STATE_READY; |
| 773 | |
| 774 | up(&demux->mutex); |
| 775 | |
| 776 | return 0; |
| 777 | } |
| 778 | |
| 779 | static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, struct dmx_ts_feed *ts_feed) |
| 780 | { |
| 781 | struct dvb_demux *demux = (struct dvb_demux *) dmx; |
| 782 | struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed; |
| 783 | |
| 784 | if (down_interruptible (&demux->mutex)) |
| 785 | return -ERESTARTSYS; |
| 786 | |
| 787 | if (feed->state == DMX_STATE_FREE) { |
| 788 | up(&demux->mutex); |
| 789 | return -EINVAL; |
| 790 | } |
| 791 | |
| 792 | #ifndef NOBUFS |
| 793 | vfree(feed->buffer); |
| 794 | feed->buffer=0; |
| 795 | #endif |
| 796 | |
| 797 | feed->state = DMX_STATE_FREE; |
| 798 | feed->filter->state = DMX_STATE_FREE; |
| 799 | |
| 800 | dvb_demux_feed_del(feed); |
| 801 | |
| 802 | feed->pid = 0xffff; |
| 803 | |
| 804 | if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) |
| 805 | demux->pesfilter[feed->pes_type] = NULL; |
| 806 | |
| 807 | up(&demux->mutex); |
| 808 | return 0; |
| 809 | } |
| 810 | |
| 811 | |
| 812 | /****************************************************************************** |
| 813 | * dmx_section_feed API calls |
| 814 | ******************************************************************************/ |
| 815 | |
| 816 | static int dmx_section_feed_allocate_filter(struct dmx_section_feed* feed, |
| 817 | struct dmx_section_filter** filter) |
| 818 | { |
| 819 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 820 | struct dvb_demux *dvbdemux = dvbdmxfeed->demux; |
| 821 | struct dvb_demux_filter *dvbdmxfilter; |
| 822 | |
| 823 | if (down_interruptible (&dvbdemux->mutex)) |
| 824 | return -ERESTARTSYS; |
| 825 | |
| 826 | dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); |
| 827 | if (!dvbdmxfilter) { |
| 828 | up(&dvbdemux->mutex); |
| 829 | return -EBUSY; |
| 830 | } |
| 831 | |
| 832 | spin_lock_irq(&dvbdemux->lock); |
| 833 | *filter = &dvbdmxfilter->filter; |
| 834 | (*filter)->parent = feed; |
| 835 | (*filter)->priv = NULL; |
| 836 | dvbdmxfilter->feed = dvbdmxfeed; |
| 837 | dvbdmxfilter->type = DMX_TYPE_SEC; |
| 838 | dvbdmxfilter->state = DMX_STATE_READY; |
| 839 | dvbdmxfilter->next = dvbdmxfeed->filter; |
| 840 | dvbdmxfeed->filter = dvbdmxfilter; |
| 841 | spin_unlock_irq(&dvbdemux->lock); |
| 842 | |
| 843 | up(&dvbdemux->mutex); |
| 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | |
| 848 | static int dmx_section_feed_set(struct dmx_section_feed* feed, |
| 849 | u16 pid, size_t circular_buffer_size, |
| 850 | int descramble, int check_crc) |
| 851 | { |
| 852 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 853 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
| 854 | |
| 855 | if (pid > 0x1fff) |
| 856 | return -EINVAL; |
| 857 | |
| 858 | if (down_interruptible (&dvbdmx->mutex)) |
| 859 | return -ERESTARTSYS; |
| 860 | |
| 861 | dvb_demux_feed_add(dvbdmxfeed); |
| 862 | |
| 863 | dvbdmxfeed->pid = pid; |
| 864 | dvbdmxfeed->buffer_size = circular_buffer_size; |
| 865 | dvbdmxfeed->descramble = descramble; |
| 866 | if (dvbdmxfeed->descramble) { |
| 867 | up(&dvbdmx->mutex); |
| 868 | return -ENOSYS; |
| 869 | } |
| 870 | |
| 871 | dvbdmxfeed->feed.sec.check_crc = check_crc; |
| 872 | |
| 873 | #ifdef NOBUFS |
| 874 | dvbdmxfeed->buffer = NULL; |
| 875 | #else |
| 876 | dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size); |
| 877 | if (!dvbdmxfeed->buffer) { |
| 878 | up(&dvbdmx->mutex); |
| 879 | return -ENOMEM; |
| 880 | } |
| 881 | #endif |
| 882 | |
| 883 | dvbdmxfeed->state = DMX_STATE_READY; |
| 884 | up(&dvbdmx->mutex); |
| 885 | return 0; |
| 886 | } |
| 887 | |
| 888 | |
| 889 | static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) |
| 890 | { |
| 891 | int i; |
| 892 | struct dvb_demux_filter *f; |
| 893 | struct dmx_section_filter *sf; |
| 894 | u8 mask, mode, doneq; |
| 895 | |
| 896 | if (!(f=dvbdmxfeed->filter)) |
| 897 | return; |
| 898 | do { |
| 899 | sf = &f->filter; |
| 900 | doneq = 0; |
| 901 | for (i=0; i<DVB_DEMUX_MASK_MAX; i++) { |
| 902 | mode = sf->filter_mode[i]; |
| 903 | mask = sf->filter_mask[i]; |
| 904 | f->maskandmode[i] = mask & mode; |
| 905 | doneq |= f->maskandnotmode[i] = mask & ~mode; |
| 906 | } |
| 907 | f->doneq = doneq ? 1 : 0; |
| 908 | } while ((f = f->next)); |
| 909 | } |
| 910 | |
| 911 | |
| 912 | static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) |
| 913 | { |
| 914 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 915 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
| 916 | int ret; |
| 917 | |
| 918 | if (down_interruptible (&dvbdmx->mutex)) |
| 919 | return -ERESTARTSYS; |
| 920 | |
| 921 | if (feed->is_filtering) { |
| 922 | up(&dvbdmx->mutex); |
| 923 | return -EBUSY; |
| 924 | } |
| 925 | |
| 926 | if (!dvbdmxfeed->filter) { |
| 927 | up(&dvbdmx->mutex); |
| 928 | return -EINVAL; |
| 929 | } |
| 930 | |
| 931 | dvbdmxfeed->feed.sec.tsfeedp = 0; |
| 932 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; |
| 933 | dvbdmxfeed->feed.sec.secbufp = 0; |
| 934 | dvbdmxfeed->feed.sec.seclen = 0; |
| 935 | |
| 936 | if (!dvbdmx->start_feed) { |
| 937 | up(&dvbdmx->mutex); |
| 938 | return -ENODEV; |
| 939 | } |
| 940 | |
| 941 | prepare_secfilters(dvbdmxfeed); |
| 942 | |
| 943 | if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { |
| 944 | up(&dvbdmx->mutex); |
| 945 | return ret; |
| 946 | } |
| 947 | |
| 948 | spin_lock_irq(&dvbdmx->lock); |
| 949 | feed->is_filtering = 1; |
| 950 | dvbdmxfeed->state = DMX_STATE_GO; |
| 951 | spin_unlock_irq(&dvbdmx->lock); |
| 952 | |
| 953 | up(&dvbdmx->mutex); |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | |
| 958 | static int dmx_section_feed_stop_filtering(struct dmx_section_feed* feed) |
| 959 | { |
| 960 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 961 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
| 962 | int ret; |
| 963 | |
| 964 | if (down_interruptible (&dvbdmx->mutex)) |
| 965 | return -ERESTARTSYS; |
| 966 | |
| 967 | if (!dvbdmx->stop_feed) { |
| 968 | up(&dvbdmx->mutex); |
| 969 | return -ENODEV; |
| 970 | } |
| 971 | |
| 972 | ret = dvbdmx->stop_feed(dvbdmxfeed); |
| 973 | |
| 974 | spin_lock_irq(&dvbdmx->lock); |
| 975 | dvbdmxfeed->state = DMX_STATE_READY; |
| 976 | feed->is_filtering = 0; |
| 977 | spin_unlock_irq(&dvbdmx->lock); |
| 978 | |
| 979 | up(&dvbdmx->mutex); |
| 980 | return ret; |
| 981 | } |
| 982 | |
| 983 | |
| 984 | static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, |
| 985 | struct dmx_section_filter* filter) |
| 986 | { |
| 987 | struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *) filter, *f; |
| 988 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 989 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; |
| 990 | |
| 991 | if (down_interruptible (&dvbdmx->mutex)) |
| 992 | return -ERESTARTSYS; |
| 993 | |
| 994 | if (dvbdmxfilter->feed != dvbdmxfeed) { |
| 995 | up(&dvbdmx->mutex); |
| 996 | return -EINVAL; |
| 997 | } |
| 998 | |
| 999 | if (feed->is_filtering) |
| 1000 | feed->stop_filtering(feed); |
| 1001 | |
| 1002 | spin_lock_irq(&dvbdmx->lock); |
| 1003 | f = dvbdmxfeed->filter; |
| 1004 | |
| 1005 | if (f == dvbdmxfilter) { |
| 1006 | dvbdmxfeed->filter = dvbdmxfilter->next; |
| 1007 | } else { |
| 1008 | while(f->next != dvbdmxfilter) |
| 1009 | f = f->next; |
| 1010 | f->next = f->next->next; |
| 1011 | } |
| 1012 | |
| 1013 | dvbdmxfilter->state = DMX_STATE_FREE; |
| 1014 | spin_unlock_irq(&dvbdmx->lock); |
| 1015 | up(&dvbdmx->mutex); |
| 1016 | return 0; |
| 1017 | } |
| 1018 | |
| 1019 | static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, |
| 1020 | struct dmx_section_feed **feed, |
| 1021 | dmx_section_cb callback) |
| 1022 | { |
| 1023 | struct dvb_demux *dvbdmx = (struct dvb_demux *) demux; |
| 1024 | struct dvb_demux_feed *dvbdmxfeed; |
| 1025 | |
| 1026 | if (down_interruptible (&dvbdmx->mutex)) |
| 1027 | return -ERESTARTSYS; |
| 1028 | |
| 1029 | if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { |
| 1030 | up(&dvbdmx->mutex); |
| 1031 | return -EBUSY; |
| 1032 | } |
| 1033 | |
| 1034 | dvbdmxfeed->type = DMX_TYPE_SEC; |
| 1035 | dvbdmxfeed->cb.sec = callback; |
| 1036 | dvbdmxfeed->demux = dvbdmx; |
| 1037 | dvbdmxfeed->pid = 0xffff; |
| 1038 | dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; |
| 1039 | dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; |
| 1040 | dvbdmxfeed->feed.sec.tsfeedp = 0; |
| 1041 | dvbdmxfeed->filter = NULL; |
| 1042 | dvbdmxfeed->buffer = NULL; |
| 1043 | |
| 1044 | (*feed)=&dvbdmxfeed->feed.sec; |
| 1045 | (*feed)->is_filtering = 0; |
| 1046 | (*feed)->parent = demux; |
| 1047 | (*feed)->priv = NULL; |
| 1048 | |
| 1049 | (*feed)->set = dmx_section_feed_set; |
| 1050 | (*feed)->allocate_filter = dmx_section_feed_allocate_filter; |
| 1051 | (*feed)->start_filtering = dmx_section_feed_start_filtering; |
| 1052 | (*feed)->stop_filtering = dmx_section_feed_stop_filtering; |
| 1053 | (*feed)->release_filter = dmx_section_feed_release_filter; |
| 1054 | |
| 1055 | up(&dvbdmx->mutex); |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | static int dvbdmx_release_section_feed(struct dmx_demux *demux, |
| 1060 | struct dmx_section_feed *feed) |
| 1061 | { |
| 1062 | struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) feed; |
| 1063 | struct dvb_demux *dvbdmx = (struct dvb_demux *) demux; |
| 1064 | |
| 1065 | if (down_interruptible (&dvbdmx->mutex)) |
| 1066 | return -ERESTARTSYS; |
| 1067 | |
| 1068 | if (dvbdmxfeed->state==DMX_STATE_FREE) { |
| 1069 | up(&dvbdmx->mutex); |
| 1070 | return -EINVAL; |
| 1071 | } |
| 1072 | #ifndef NOBUFS |
| 1073 | vfree(dvbdmxfeed->buffer); |
| 1074 | dvbdmxfeed->buffer=0; |
| 1075 | #endif |
| 1076 | dvbdmxfeed->state=DMX_STATE_FREE; |
| 1077 | |
| 1078 | dvb_demux_feed_del(dvbdmxfeed); |
| 1079 | |
| 1080 | dvbdmxfeed->pid = 0xffff; |
| 1081 | |
| 1082 | up(&dvbdmx->mutex); |
| 1083 | return 0; |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | /****************************************************************************** |
| 1088 | * dvb_demux kernel data API calls |
| 1089 | ******************************************************************************/ |
| 1090 | |
| 1091 | static int dvbdmx_open(struct dmx_demux *demux) |
| 1092 | { |
| 1093 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1094 | |
| 1095 | if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) |
| 1096 | return -EUSERS; |
| 1097 | |
| 1098 | dvbdemux->users++; |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | static int dvbdmx_close(struct dmx_demux *demux) |
| 1104 | { |
| 1105 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1106 | |
| 1107 | if (dvbdemux->users == 0) |
| 1108 | return -ENODEV; |
| 1109 | |
| 1110 | dvbdemux->users--; |
| 1111 | //FIXME: release any unneeded resources if users==0 |
| 1112 | return 0; |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count) |
| 1117 | { |
| 1118 | struct dvb_demux *dvbdemux=(struct dvb_demux *) demux; |
| 1119 | |
| 1120 | if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) |
| 1121 | return -EINVAL; |
| 1122 | |
| 1123 | if (down_interruptible (&dvbdemux->mutex)) |
| 1124 | return -ERESTARTSYS; |
| 1125 | dvb_dmx_swfilter(dvbdemux, buf, count); |
| 1126 | up(&dvbdemux->mutex); |
| 1127 | |
| 1128 | if (signal_pending(current)) |
| 1129 | return -EINTR; |
| 1130 | return count; |
| 1131 | } |
| 1132 | |
| 1133 | |
| 1134 | static int dvbdmx_add_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) |
| 1135 | { |
| 1136 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1137 | struct list_head *head = &dvbdemux->frontend_list; |
| 1138 | |
| 1139 | list_add(&(frontend->connectivity_list), head); |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | static int dvbdmx_remove_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) |
| 1146 | { |
| 1147 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1148 | struct list_head *pos, *n, *head = &dvbdemux->frontend_list; |
| 1149 | |
| 1150 | list_for_each_safe (pos, n, head) { |
| 1151 | if (DMX_FE_ENTRY(pos) == frontend) { |
| 1152 | list_del(pos); |
| 1153 | return 0; |
| 1154 | } |
| 1155 | } |
| 1156 | |
| 1157 | return -ENODEV; |
| 1158 | } |
| 1159 | |
| 1160 | |
| 1161 | static struct list_head * dvbdmx_get_frontends(struct dmx_demux *demux) |
| 1162 | { |
| 1163 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1164 | |
| 1165 | if (list_empty(&dvbdemux->frontend_list)) |
| 1166 | return NULL; |
| 1167 | return &dvbdemux->frontend_list; |
| 1168 | } |
| 1169 | |
| 1170 | |
| 1171 | static int dvbdmx_connect_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend) |
| 1172 | { |
| 1173 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1174 | |
| 1175 | if (demux->frontend) |
| 1176 | return -EINVAL; |
| 1177 | |
| 1178 | if (down_interruptible (&dvbdemux->mutex)) |
| 1179 | return -ERESTARTSYS; |
| 1180 | |
| 1181 | demux->frontend = frontend; |
| 1182 | up(&dvbdemux->mutex); |
| 1183 | return 0; |
| 1184 | } |
| 1185 | |
| 1186 | |
| 1187 | static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) |
| 1188 | { |
| 1189 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1190 | |
| 1191 | if (down_interruptible (&dvbdemux->mutex)) |
| 1192 | return -ERESTARTSYS; |
| 1193 | |
| 1194 | demux->frontend = NULL; |
| 1195 | up(&dvbdemux->mutex); |
| 1196 | return 0; |
| 1197 | } |
| 1198 | |
| 1199 | |
| 1200 | static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 *pids) |
| 1201 | { |
| 1202 | struct dvb_demux *dvbdemux = (struct dvb_demux *) demux; |
| 1203 | |
| 1204 | memcpy(pids, dvbdemux->pids, 5*sizeof(u16)); |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | int dvb_dmx_init(struct dvb_demux *dvbdemux) |
| 1210 | { |
| 1211 | int i, err; |
| 1212 | struct dmx_demux *dmx = &dvbdemux->dmx; |
| 1213 | |
| 1214 | dvbdemux->users = 0; |
| 1215 | dvbdemux->filter = vmalloc(dvbdemux->filternum*sizeof(struct dvb_demux_filter)); |
| 1216 | |
| 1217 | if (!dvbdemux->filter) |
| 1218 | return -ENOMEM; |
| 1219 | |
| 1220 | dvbdemux->feed = vmalloc(dvbdemux->feednum*sizeof(struct dvb_demux_feed)); |
| 1221 | if (!dvbdemux->feed) { |
| 1222 | vfree(dvbdemux->filter); |
| 1223 | return -ENOMEM; |
| 1224 | } |
| 1225 | for (i=0; i<dvbdemux->filternum; i++) { |
| 1226 | dvbdemux->filter[i].state = DMX_STATE_FREE; |
| 1227 | dvbdemux->filter[i].index = i; |
| 1228 | } |
| 1229 | for (i=0; i<dvbdemux->feednum; i++) { |
| 1230 | dvbdemux->feed[i].state = DMX_STATE_FREE; |
| 1231 | dvbdemux->feed[i].index = i; |
| 1232 | } |
| 1233 | dvbdemux->frontend_list.next= |
| 1234 | dvbdemux->frontend_list.prev= |
| 1235 | &dvbdemux->frontend_list; |
| 1236 | for (i=0; i<DMX_TS_PES_OTHER; i++) { |
| 1237 | dvbdemux->pesfilter[i] = NULL; |
| 1238 | dvbdemux->pids[i] = 0xffff; |
| 1239 | } |
| 1240 | |
| 1241 | INIT_LIST_HEAD(&dvbdemux->feed_list); |
| 1242 | |
| 1243 | dvbdemux->playing = 0; |
| 1244 | dvbdemux->recording = 0; |
| 1245 | dvbdemux->tsbufp = 0; |
| 1246 | |
| 1247 | if (!dvbdemux->check_crc32) |
| 1248 | dvbdemux->check_crc32 = dvb_dmx_crc32; |
| 1249 | |
| 1250 | if (!dvbdemux->memcopy) |
| 1251 | dvbdemux->memcopy = dvb_dmx_memcopy; |
| 1252 | |
| 1253 | dmx->frontend = NULL; |
| 1254 | dmx->reg_list.prev = dmx->reg_list.next = &dmx->reg_list; |
| 1255 | dmx->priv = (void *) dvbdemux; |
| 1256 | dmx->open = dvbdmx_open; |
| 1257 | dmx->close = dvbdmx_close; |
| 1258 | dmx->write = dvbdmx_write; |
| 1259 | dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; |
| 1260 | dmx->release_ts_feed = dvbdmx_release_ts_feed; |
| 1261 | dmx->allocate_section_feed = dvbdmx_allocate_section_feed; |
| 1262 | dmx->release_section_feed = dvbdmx_release_section_feed; |
| 1263 | |
| 1264 | dmx->descramble_mac_address = NULL; |
| 1265 | dmx->descramble_section_payload = NULL; |
| 1266 | |
| 1267 | dmx->add_frontend = dvbdmx_add_frontend; |
| 1268 | dmx->remove_frontend = dvbdmx_remove_frontend; |
| 1269 | dmx->get_frontends = dvbdmx_get_frontends; |
| 1270 | dmx->connect_frontend = dvbdmx_connect_frontend; |
| 1271 | dmx->disconnect_frontend = dvbdmx_disconnect_frontend; |
| 1272 | dmx->get_pes_pids = dvbdmx_get_pes_pids; |
| 1273 | |
| 1274 | sema_init(&dvbdemux->mutex, 1); |
| 1275 | spin_lock_init(&dvbdemux->lock); |
| 1276 | |
| 1277 | if ((err = dmx_register_demux(dmx)) < 0) |
| 1278 | return err; |
| 1279 | |
| 1280 | return 0; |
| 1281 | } |
| 1282 | EXPORT_SYMBOL(dvb_dmx_init); |
| 1283 | |
| 1284 | |
| 1285 | int dvb_dmx_release(struct dvb_demux *dvbdemux) |
| 1286 | { |
| 1287 | struct dmx_demux *dmx = &dvbdemux->dmx; |
| 1288 | |
| 1289 | dmx_unregister_demux(dmx); |
| 1290 | vfree(dvbdemux->filter); |
| 1291 | vfree(dvbdemux->feed); |
| 1292 | return 0; |
| 1293 | } |
| 1294 | EXPORT_SYMBOL(dvb_dmx_release); |