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/sched.h> 25#include <linux/spinlock.h> 26#include <linux/slab.h> 27#include <linux/vmalloc.h> 28#include <linux/module.h> 29#include <linux/poll.h> 30#include <linux/string.h> 31#include <linux/crc32.h> 32#include <asm/uaccess.h> 33#include <asm/div64.h> 34 35#include "dvb_demux.h" 36 37#define NOBUFS 38/* 39** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog 40*/ 41// #define DVB_DEMUX_SECTION_LOSS_LOG 42 43static int dvb_demux_tscheck; 44module_param(dvb_demux_tscheck, int, 0644); 45MODULE_PARM_DESC(dvb_demux_tscheck, 46 "enable transport stream continuity and TEI check"); 47 48static int dvb_demux_speedcheck; 49module_param(dvb_demux_speedcheck, int, 0644); 50MODULE_PARM_DESC(dvb_demux_speedcheck, 51 "enable transport stream speed check"); 52 53#define dprintk_tscheck(x...) do { \ 54 if (dvb_demux_tscheck && printk_ratelimit()) \ 55 printk(x); \ 56 } while (0) 57 58/****************************************************************************** 59 * static inlined helper functions 60 ******************************************************************************/ 61 62static inline u16 section_length(const u8 *buf) 63{ 64 return 3 + ((buf[1] & 0x0f) << 8) + buf[2]; 65} 66 67static inline u16 ts_pid(const u8 *buf) 68{ 69 return ((buf[1] & 0x1f) << 8) + buf[2]; 70} 71 72static inline u8 payload(const u8 *tsp) 73{ 74 if (!(tsp[3] & 0x10)) // no payload? 75 return 0; 76 77 if (tsp[3] & 0x20) { // adaptation field? 78 if (tsp[4] > 183) // corrupted data? 79 return 0; 80 else 81 return 184 - 1 - tsp[4]; 82 } 83 84 return 184; 85} 86 87static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len) 88{ 89 return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len)); 90} 91 92static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s, 93 size_t len) 94{ 95 memcpy(d, s, len); 96} 97 98/****************************************************************************** 99 * Software filter functions 100 ******************************************************************************/ 101 102static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed, 103 const u8 *buf) 104{ 105 int count = payload(buf); 106 int p; 107 //int ccok; 108 //u8 cc; 109 110 if (count == 0) 111 return -1; 112 113 p = 188 - count; 114 115 /* 116 cc = buf[3] & 0x0f; 117 ccok = ((feed->cc + 1) & 0x0f) == cc; 118 feed->cc = cc; 119 if (!ccok) 120 printk("missed packet!\n"); 121 */ 122 123 if (buf[1] & 0x40) // PUSI ? 124 feed->peslen = 0xfffa; 125 126 feed->peslen += count; 127 128 return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK); 129} 130 131static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed, 132 struct dvb_demux_filter *f) 133{ 134 u8 neq = 0; 135 int i; 136 137 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { 138 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i]; 139 140 if (f->maskandmode[i] & xor) 141 return 0; 142 143 neq |= f->maskandnotmode[i] & xor; 144 } 145 146 if (f->doneq && !neq) 147 return 0; 148 149 return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen, 150 NULL, 0, &f->filter, DMX_OK); 151} 152 153static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed) 154{ 155 struct dvb_demux *demux = feed->demux; 156 struct dvb_demux_filter *f = feed->filter; 157 struct dmx_section_feed *sec = &feed->feed.sec; 158 int section_syntax_indicator; 159 160 if (!sec->is_filtering) 161 return 0; 162 163 if (!f) 164 return 0; 165 166 if (sec->check_crc) { 167 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0); 168 if (section_syntax_indicator && 169 demux->check_crc32(feed, sec->secbuf, sec->seclen)) 170 return -1; 171 } 172 173 do { 174 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0) 175 return -1; 176 } while ((f = f->next) && sec->is_filtering); 177 178 sec->seclen = 0; 179 180 return 0; 181} 182 183static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed) 184{ 185 struct dmx_section_feed *sec = &feed->feed.sec; 186 187#ifdef DVB_DEMUX_SECTION_LOSS_LOG 188 if (sec->secbufp < sec->tsfeedp) { 189 int i, n = sec->tsfeedp - sec->secbufp; 190 191 /* 192 * Section padding is done with 0xff bytes entirely. 193 * Due to speed reasons, we won't check all of them 194 * but just first and last. 195 */ 196 if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) { 197 printk("dvb_demux.c section ts padding loss: %d/%d\n", 198 n, sec->tsfeedp); 199 printk("dvb_demux.c pad data:"); 200 for (i = 0; i < n; i++) 201 printk(" %02x", sec->secbuf[i]); 202 printk("\n"); 203 } 204 } 205#endif 206 207 sec->tsfeedp = sec->secbufp = sec->seclen = 0; 208 sec->secbuf = sec->secbuf_base; 209} 210 211/* 212 * Losless Section Demux 1.4.1 by Emard 213 * Valsecchi Patrick: 214 * - middle of section A (no PUSI) 215 * - end of section A and start of section B 216 * (with PUSI pointing to the start of the second section) 217 * 218 * In this case, without feed->pusi_seen you'll receive a garbage section 219 * consisting of the end of section A. Basically because tsfeedp 220 * is incemented and the use=0 condition is not raised 221 * when the second packet arrives. 222 * 223 * Fix: 224 * when demux is started, let feed->pusi_seen = 0 to 225 * prevent initial feeding of garbage from the end of 226 * previous section. When you for the first time see PUSI=1 227 * then set feed->pusi_seen = 1 228 */ 229static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, 230 const u8 *buf, u8 len) 231{ 232 struct dvb_demux *demux = feed->demux; 233 struct dmx_section_feed *sec = &feed->feed.sec; 234 u16 limit, seclen, n; 235 236 if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE) 237 return 0; 238 239 if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) { 240#ifdef DVB_DEMUX_SECTION_LOSS_LOG 241 printk("dvb_demux.c section buffer full loss: %d/%d\n", 242 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, 243 DMX_MAX_SECFEED_SIZE); 244#endif 245 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp; 246 } 247 248 if (len <= 0) 249 return 0; 250 251 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len); 252 sec->tsfeedp += len; 253 254 /* 255 * Dump all the sections we can find in the data (Emard) 256 */ 257 limit = sec->tsfeedp; 258 if (limit > DMX_MAX_SECFEED_SIZE) 259 return -1; /* internal error should never happen */ 260 261 /* to be sure always set secbuf */ 262 sec->secbuf = sec->secbuf_base + sec->secbufp; 263 264 for (n = 0; sec->secbufp + 2 < limit; n++) { 265 seclen = section_length(sec->secbuf); 266 if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE 267 || seclen + sec->secbufp > limit) 268 return 0; 269 sec->seclen = seclen; 270 sec->crc_val = ~0; 271 /* dump [secbuf .. secbuf+seclen) */ 272 if (feed->pusi_seen) 273 dvb_dmx_swfilter_section_feed(feed); 274#ifdef DVB_DEMUX_SECTION_LOSS_LOG 275 else 276 printk("dvb_demux.c pusi not seen, discarding section data\n"); 277#endif 278 sec->secbufp += seclen; /* secbufp and secbuf moving together is */ 279 sec->secbuf += seclen; /* redundant but saves pointer arithmetic */ 280 } 281 282 return 0; 283} 284 285static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, 286 const u8 *buf) 287{ 288 u8 p, count; 289 int ccok, dc_i = 0; 290 u8 cc; 291 292 count = payload(buf); 293 294 if (count == 0) /* count == 0 if no payload or out of range */ 295 return -1; 296 297 p = 188 - count; /* payload start */ 298 299 cc = buf[3] & 0x0f; 300 ccok = ((feed->cc + 1) & 0x0f) == cc; 301 feed->cc = cc; 302 303 if (buf[3] & 0x20) { 304 /* adaption field present, check for discontinuity_indicator */ 305 if ((buf[4] > 0) && (buf[5] & 0x80)) 306 dc_i = 1; 307 } 308 309 if (!ccok || dc_i) { 310#ifdef DVB_DEMUX_SECTION_LOSS_LOG 311 printk("dvb_demux.c discontinuity detected %d bytes lost\n", 312 count); 313 /* 314 * those bytes under sume circumstances will again be reported 315 * in the following dvb_dmx_swfilter_section_new 316 */ 317#endif 318 /* 319 * Discontinuity detected. Reset pusi_seen = 0 to 320 * stop feeding of suspicious data until next PUSI=1 arrives 321 */ 322 feed->pusi_seen = 0; 323 dvb_dmx_swfilter_section_new(feed); 324 } 325 326 if (buf[1] & 0x40) { 327 /* PUSI=1 (is set), section boundary is here */ 328 if (count > 1 && buf[p] < count) { 329 const u8 *before = &buf[p + 1]; 330 u8 before_len = buf[p]; 331 const u8 *after = &before[before_len]; 332 u8 after_len = count - 1 - before_len; 333 334 dvb_dmx_swfilter_section_copy_dump(feed, before, 335 before_len); 336 /* before start of new section, set pusi_seen = 1 */ 337 feed->pusi_seen = 1; 338 dvb_dmx_swfilter_section_new(feed); 339 dvb_dmx_swfilter_section_copy_dump(feed, after, 340 after_len); 341 } 342#ifdef DVB_DEMUX_SECTION_LOSS_LOG 343 else if (count > 0) 344 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count); 345#endif 346 } else { 347 /* PUSI=0 (is not set), no section boundary */ 348 dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count); 349 } 350 351 return 0; 352} 353 354static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, 355 const u8 *buf) 356{ 357 switch (feed->type) { 358 case DMX_TYPE_TS: 359 if (!feed->feed.ts.is_filtering) 360 break; 361 if (feed->ts_type & TS_PACKET) { 362 if (feed->ts_type & TS_PAYLOAD_ONLY) 363 dvb_dmx_swfilter_payload(feed, buf); 364 else 365 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, 366 DMX_OK); 367 } 368 if (feed->ts_type & TS_DECODER) 369 if (feed->demux->write_to_decoder) 370 feed->demux->write_to_decoder(feed, buf, 188); 371 break; 372 373 case DMX_TYPE_SEC: 374 if (!feed->feed.sec.is_filtering) 375 break; 376 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0) 377 feed->feed.sec.seclen = feed->feed.sec.secbufp = 0; 378 break; 379 380 default: 381 break; 382 } 383} 384 385#define DVR_FEED(f) \ 386 (((f)->type == DMX_TYPE_TS) && \ 387 ((f)->feed.ts.is_filtering) && \ 388 (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET)) 389 390static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) 391{ 392 struct dvb_demux_feed *feed; 393 u16 pid = ts_pid(buf); 394 int dvr_done = 0; 395 396 if (dvb_demux_speedcheck) { 397 struct timespec cur_time, delta_time; 398 u64 speed_bytes, speed_timedelta; 399 400 demux->speed_pkts_cnt++; 401 402 /* show speed every SPEED_PKTS_INTERVAL packets */ 403 if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) { 404 cur_time = current_kernel_time(); 405 406 if (demux->speed_last_time.tv_sec != 0 && 407 demux->speed_last_time.tv_nsec != 0) { 408 delta_time = timespec_sub(cur_time, 409 demux->speed_last_time); 410 speed_bytes = (u64)demux->speed_pkts_cnt 411 * 188 * 8; 412 /* convert to 1024 basis */ 413 speed_bytes = 1000 * div64_u64(speed_bytes, 414 1024); 415 speed_timedelta = 416 (u64)timespec_to_ns(&delta_time); 417 speed_timedelta = div64_u64(speed_timedelta, 418 1000000); /* nsec -> usec */ 419 printk(KERN_INFO "TS speed %llu Kbits/sec \n", 420 div64_u64(speed_bytes, 421 speed_timedelta)); 422 }; 423 424 demux->speed_last_time = cur_time; 425 demux->speed_pkts_cnt = 0; 426 }; 427 }; 428 429 if (demux->cnt_storage && dvb_demux_tscheck) { 430 /* check pkt counter */ 431 if (pid < MAX_PID) { 432 if (buf[1] & 0x80) 433 dprintk_tscheck("TEI detected. " 434 "PID=0x%x data1=0x%x\n", 435 pid, buf[1]); 436 437 if ((buf[3] & 0xf) != demux->cnt_storage[pid]) 438 dprintk_tscheck("TS packet counter mismatch. " 439 "PID=0x%x expected 0x%x " 440 "got 0x%x\n", 441 pid, demux->cnt_storage[pid], 442 buf[3] & 0xf); 443 444 demux->cnt_storage[pid] = ((buf[3] & 0xf) + 1)&0xf; 445 }; 446 /* end check */ 447 }; 448 449 list_for_each_entry(feed, &demux->feed_list, list_head) { 450 if ((feed->pid != pid) && (feed->pid != 0x2000)) 451 continue; 452 453 /* copy each packet only once to the dvr device, even 454 * if a PID is in multiple filters (e.g. video + PCR) */ 455 if ((DVR_FEED(feed)) && (dvr_done++)) 456 continue; 457 458 if (feed->pid == pid) 459 dvb_dmx_swfilter_packet_type(feed, buf); 460 else if (feed->pid == 0x2000) 461 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK); 462 } 463} 464 465void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, 466 size_t count) 467{ 468 spin_lock(&demux->lock); 469 470 while (count--) { 471 if (buf[0] == 0x47) 472 dvb_dmx_swfilter_packet(demux, buf); 473 buf += 188; 474 } 475 476 spin_unlock(&demux->lock); 477} 478 479EXPORT_SYMBOL(dvb_dmx_swfilter_packets); 480 481void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count) 482{ 483 int p = 0, i, j; 484 485 spin_lock(&demux->lock); 486 487 if (demux->tsbufp) { 488 i = demux->tsbufp; 489 j = 188 - i; 490 if (count < j) { 491 memcpy(&demux->tsbuf[i], buf, count); 492 demux->tsbufp += count; 493 goto bailout; 494 } 495 memcpy(&demux->tsbuf[i], buf, j); 496 if (demux->tsbuf[0] == 0x47) 497 dvb_dmx_swfilter_packet(demux, demux->tsbuf); 498 demux->tsbufp = 0; 499 p += j; 500 } 501 502 while (p < count) { 503 if (buf[p] == 0x47) { 504 if (count - p >= 188) { 505 dvb_dmx_swfilter_packet(demux, &buf[p]); 506 p += 188; 507 } else { 508 i = count - p; 509 memcpy(demux->tsbuf, &buf[p], i); 510 demux->tsbufp = i; 511 goto bailout; 512 } 513 } else 514 p++; 515 } 516 517bailout: 518 spin_unlock(&demux->lock); 519} 520 521EXPORT_SYMBOL(dvb_dmx_swfilter); 522 523void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count) 524{ 525 int p = 0, i, j; 526 u8 tmppack[188]; 527 528 spin_lock(&demux->lock); 529 530 if (demux->tsbufp) { 531 i = demux->tsbufp; 532 j = 204 - i; 533 if (count < j) { 534 memcpy(&demux->tsbuf[i], buf, count); 535 demux->tsbufp += count; 536 goto bailout; 537 } 538 memcpy(&demux->tsbuf[i], buf, j); 539 if ((demux->tsbuf[0] == 0x47) || (demux->tsbuf[0] == 0xB8)) { 540 memcpy(tmppack, demux->tsbuf, 188); 541 if (tmppack[0] == 0xB8) 542 tmppack[0] = 0x47; 543 dvb_dmx_swfilter_packet(demux, tmppack); 544 } 545 demux->tsbufp = 0; 546 p += j; 547 } 548 549 while (p < count) { 550 if ((buf[p] == 0x47) || (buf[p] == 0xB8)) { 551 if (count - p >= 204) { 552 memcpy(tmppack, &buf[p], 188); 553 if (tmppack[0] == 0xB8) 554 tmppack[0] = 0x47; 555 dvb_dmx_swfilter_packet(demux, tmppack); 556 p += 204; 557 } else { 558 i = count - p; 559 memcpy(demux->tsbuf, &buf[p], i); 560 demux->tsbufp = i; 561 goto bailout; 562 } 563 } else { 564 p++; 565 } 566 } 567 568bailout: 569 spin_unlock(&demux->lock); 570} 571 572EXPORT_SYMBOL(dvb_dmx_swfilter_204); 573 574static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux) 575{ 576 int i; 577 578 for (i = 0; i < demux->filternum; i++) 579 if (demux->filter[i].state == DMX_STATE_FREE) 580 break; 581 582 if (i == demux->filternum) 583 return NULL; 584 585 demux->filter[i].state = DMX_STATE_ALLOCATED; 586 587 return &demux->filter[i]; 588} 589 590static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux) 591{ 592 int i; 593 594 for (i = 0; i < demux->feednum; i++) 595 if (demux->feed[i].state == DMX_STATE_FREE) 596 break; 597 598 if (i == demux->feednum) 599 return NULL; 600 601 demux->feed[i].state = DMX_STATE_ALLOCATED; 602 603 return &demux->feed[i]; 604} 605 606static int dvb_demux_feed_find(struct dvb_demux_feed *feed) 607{ 608 struct dvb_demux_feed *entry; 609 610 list_for_each_entry(entry, &feed->demux->feed_list, list_head) 611 if (entry == feed) 612 return 1; 613 614 return 0; 615} 616 617static void dvb_demux_feed_add(struct dvb_demux_feed *feed) 618{ 619 spin_lock_irq(&feed->demux->lock); 620 if (dvb_demux_feed_find(feed)) { 621 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n", 622 __func__, feed->type, feed->state, feed->pid); 623 goto out; 624 } 625 626 list_add(&feed->list_head, &feed->demux->feed_list); 627out: 628 spin_unlock_irq(&feed->demux->lock); 629} 630 631static void dvb_demux_feed_del(struct dvb_demux_feed *feed) 632{ 633 spin_lock_irq(&feed->demux->lock); 634 if (!(dvb_demux_feed_find(feed))) { 635 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n", 636 __func__, feed->type, feed->state, feed->pid); 637 goto out; 638 } 639 640 list_del(&feed->list_head); 641out: 642 spin_unlock_irq(&feed->demux->lock); 643} 644 645static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type, 646 enum dmx_ts_pes pes_type, 647 size_t circular_buffer_size, struct timespec timeout) 648{ 649 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; 650 struct dvb_demux *demux = feed->demux; 651 652 if (pid > DMX_MAX_PID) 653 return -EINVAL; 654 655 if (mutex_lock_interruptible(&demux->mutex)) 656 return -ERESTARTSYS; 657 658 if (ts_type & TS_DECODER) { 659 if (pes_type >= DMX_TS_PES_OTHER) { 660 mutex_unlock(&demux->mutex); 661 return -EINVAL; 662 } 663 664 if (demux->pesfilter[pes_type] && 665 demux->pesfilter[pes_type] != feed) { 666 mutex_unlock(&demux->mutex); 667 return -EINVAL; 668 } 669 670 demux->pesfilter[pes_type] = feed; 671 demux->pids[pes_type] = pid; 672 } 673 674 dvb_demux_feed_add(feed); 675 676 feed->pid = pid; 677 feed->buffer_size = circular_buffer_size; 678 feed->timeout = timeout; 679 feed->ts_type = ts_type; 680 feed->pes_type = pes_type; 681 682 if (feed->buffer_size) { 683#ifdef NOBUFS 684 feed->buffer = NULL; 685#else 686 feed->buffer = vmalloc(feed->buffer_size); 687 if (!feed->buffer) { 688 mutex_unlock(&demux->mutex); 689 return -ENOMEM; 690 } 691#endif 692 } 693 694 feed->state = DMX_STATE_READY; 695 mutex_unlock(&demux->mutex); 696 697 return 0; 698} 699 700static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed) 701{ 702 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; 703 struct dvb_demux *demux = feed->demux; 704 int ret; 705 706 if (mutex_lock_interruptible(&demux->mutex)) 707 return -ERESTARTSYS; 708 709 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) { 710 mutex_unlock(&demux->mutex); 711 return -EINVAL; 712 } 713 714 if (!demux->start_feed) { 715 mutex_unlock(&demux->mutex); 716 return -ENODEV; 717 } 718 719 if ((ret = demux->start_feed(feed)) < 0) { 720 mutex_unlock(&demux->mutex); 721 return ret; 722 } 723 724 spin_lock_irq(&demux->lock); 725 ts_feed->is_filtering = 1; 726 feed->state = DMX_STATE_GO; 727 spin_unlock_irq(&demux->lock); 728 mutex_unlock(&demux->mutex); 729 730 return 0; 731} 732 733static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed) 734{ 735 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; 736 struct dvb_demux *demux = feed->demux; 737 int ret; 738 739 mutex_lock(&demux->mutex); 740 741 if (feed->state < DMX_STATE_GO) { 742 mutex_unlock(&demux->mutex); 743 return -EINVAL; 744 } 745 746 if (!demux->stop_feed) { 747 mutex_unlock(&demux->mutex); 748 return -ENODEV; 749 } 750 751 ret = demux->stop_feed(feed); 752 753 spin_lock_irq(&demux->lock); 754 ts_feed->is_filtering = 0; 755 feed->state = DMX_STATE_ALLOCATED; 756 spin_unlock_irq(&demux->lock); 757 mutex_unlock(&demux->mutex); 758 759 return ret; 760} 761 762static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx, 763 struct dmx_ts_feed **ts_feed, 764 dmx_ts_cb callback) 765{ 766 struct dvb_demux *demux = (struct dvb_demux *)dmx; 767 struct dvb_demux_feed *feed; 768 769 if (mutex_lock_interruptible(&demux->mutex)) 770 return -ERESTARTSYS; 771 772 if (!(feed = dvb_dmx_feed_alloc(demux))) { 773 mutex_unlock(&demux->mutex); 774 return -EBUSY; 775 } 776 777 feed->type = DMX_TYPE_TS; 778 feed->cb.ts = callback; 779 feed->demux = demux; 780 feed->pid = 0xffff; 781 feed->peslen = 0xfffa; 782 feed->buffer = NULL; 783 784 (*ts_feed) = &feed->feed.ts; 785 (*ts_feed)->parent = dmx; 786 (*ts_feed)->priv = NULL; 787 (*ts_feed)->is_filtering = 0; 788 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering; 789 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering; 790 (*ts_feed)->set = dmx_ts_feed_set; 791 792 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) { 793 feed->state = DMX_STATE_FREE; 794 mutex_unlock(&demux->mutex); 795 return -EBUSY; 796 } 797 798 feed->filter->type = DMX_TYPE_TS; 799 feed->filter->feed = feed; 800 feed->filter->state = DMX_STATE_READY; 801 802 mutex_unlock(&demux->mutex); 803 804 return 0; 805} 806 807static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, 808 struct dmx_ts_feed *ts_feed) 809{ 810 struct dvb_demux *demux = (struct dvb_demux *)dmx; 811 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed; 812 813 mutex_lock(&demux->mutex); 814 815 if (feed->state == DMX_STATE_FREE) { 816 mutex_unlock(&demux->mutex); 817 return -EINVAL; 818 } 819#ifndef NOBUFS 820 vfree(feed->buffer); 821 feed->buffer = NULL; 822#endif 823 824 feed->state = DMX_STATE_FREE; 825 feed->filter->state = DMX_STATE_FREE; 826 827 dvb_demux_feed_del(feed); 828 829 feed->pid = 0xffff; 830 831 if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER) 832 demux->pesfilter[feed->pes_type] = NULL; 833 834 mutex_unlock(&demux->mutex); 835 return 0; 836} 837 838/****************************************************************************** 839 * dmx_section_feed API calls 840 ******************************************************************************/ 841 842static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed, 843 struct dmx_section_filter **filter) 844{ 845 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 846 struct dvb_demux *dvbdemux = dvbdmxfeed->demux; 847 struct dvb_demux_filter *dvbdmxfilter; 848 849 if (mutex_lock_interruptible(&dvbdemux->mutex)) 850 return -ERESTARTSYS; 851 852 dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux); 853 if (!dvbdmxfilter) { 854 mutex_unlock(&dvbdemux->mutex); 855 return -EBUSY; 856 } 857 858 spin_lock_irq(&dvbdemux->lock); 859 *filter = &dvbdmxfilter->filter; 860 (*filter)->parent = feed; 861 (*filter)->priv = NULL; 862 dvbdmxfilter->feed = dvbdmxfeed; 863 dvbdmxfilter->type = DMX_TYPE_SEC; 864 dvbdmxfilter->state = DMX_STATE_READY; 865 dvbdmxfilter->next = dvbdmxfeed->filter; 866 dvbdmxfeed->filter = dvbdmxfilter; 867 spin_unlock_irq(&dvbdemux->lock); 868 869 mutex_unlock(&dvbdemux->mutex); 870 return 0; 871} 872 873static int dmx_section_feed_set(struct dmx_section_feed *feed, 874 u16 pid, size_t circular_buffer_size, 875 int check_crc) 876{ 877 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 878 struct dvb_demux *dvbdmx = dvbdmxfeed->demux; 879 880 if (pid > 0x1fff) 881 return -EINVAL; 882 883 if (mutex_lock_interruptible(&dvbdmx->mutex)) 884 return -ERESTARTSYS; 885 886 dvb_demux_feed_add(dvbdmxfeed); 887 888 dvbdmxfeed->pid = pid; 889 dvbdmxfeed->buffer_size = circular_buffer_size; 890 dvbdmxfeed->feed.sec.check_crc = check_crc; 891 892#ifdef NOBUFS 893 dvbdmxfeed->buffer = NULL; 894#else 895 dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size); 896 if (!dvbdmxfeed->buffer) { 897 mutex_unlock(&dvbdmx->mutex); 898 return -ENOMEM; 899 } 900#endif 901 902 dvbdmxfeed->state = DMX_STATE_READY; 903 mutex_unlock(&dvbdmx->mutex); 904 return 0; 905} 906 907static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed) 908{ 909 int i; 910 struct dvb_demux_filter *f; 911 struct dmx_section_filter *sf; 912 u8 mask, mode, doneq; 913 914 if (!(f = dvbdmxfeed->filter)) 915 return; 916 do { 917 sf = &f->filter; 918 doneq = 0; 919 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) { 920 mode = sf->filter_mode[i]; 921 mask = sf->filter_mask[i]; 922 f->maskandmode[i] = mask & mode; 923 doneq |= f->maskandnotmode[i] = mask & ~mode; 924 } 925 f->doneq = doneq ? 1 : 0; 926 } while ((f = f->next)); 927} 928 929static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed) 930{ 931 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 932 struct dvb_demux *dvbdmx = dvbdmxfeed->demux; 933 int ret; 934 935 if (mutex_lock_interruptible(&dvbdmx->mutex)) 936 return -ERESTARTSYS; 937 938 if (feed->is_filtering) { 939 mutex_unlock(&dvbdmx->mutex); 940 return -EBUSY; 941 } 942 943 if (!dvbdmxfeed->filter) { 944 mutex_unlock(&dvbdmx->mutex); 945 return -EINVAL; 946 } 947 948 dvbdmxfeed->feed.sec.tsfeedp = 0; 949 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; 950 dvbdmxfeed->feed.sec.secbufp = 0; 951 dvbdmxfeed->feed.sec.seclen = 0; 952 953 if (!dvbdmx->start_feed) { 954 mutex_unlock(&dvbdmx->mutex); 955 return -ENODEV; 956 } 957 958 prepare_secfilters(dvbdmxfeed); 959 960 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) { 961 mutex_unlock(&dvbdmx->mutex); 962 return ret; 963 } 964 965 spin_lock_irq(&dvbdmx->lock); 966 feed->is_filtering = 1; 967 dvbdmxfeed->state = DMX_STATE_GO; 968 spin_unlock_irq(&dvbdmx->lock); 969 970 mutex_unlock(&dvbdmx->mutex); 971 return 0; 972} 973 974static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed) 975{ 976 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 977 struct dvb_demux *dvbdmx = dvbdmxfeed->demux; 978 int ret; 979 980 mutex_lock(&dvbdmx->mutex); 981 982 if (!dvbdmx->stop_feed) { 983 mutex_unlock(&dvbdmx->mutex); 984 return -ENODEV; 985 } 986 987 ret = dvbdmx->stop_feed(dvbdmxfeed); 988 989 spin_lock_irq(&dvbdmx->lock); 990 dvbdmxfeed->state = DMX_STATE_READY; 991 feed->is_filtering = 0; 992 spin_unlock_irq(&dvbdmx->lock); 993 994 mutex_unlock(&dvbdmx->mutex); 995 return ret; 996} 997 998static int dmx_section_feed_release_filter(struct dmx_section_feed *feed, 999 struct dmx_section_filter *filter) 1000{ 1001 struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f; 1002 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 1003 struct dvb_demux *dvbdmx = dvbdmxfeed->demux; 1004 1005 mutex_lock(&dvbdmx->mutex); 1006 1007 if (dvbdmxfilter->feed != dvbdmxfeed) { 1008 mutex_unlock(&dvbdmx->mutex); 1009 return -EINVAL; 1010 } 1011 1012 if (feed->is_filtering) 1013 feed->stop_filtering(feed); 1014 1015 spin_lock_irq(&dvbdmx->lock); 1016 f = dvbdmxfeed->filter; 1017 1018 if (f == dvbdmxfilter) { 1019 dvbdmxfeed->filter = dvbdmxfilter->next; 1020 } else { 1021 while (f->next != dvbdmxfilter) 1022 f = f->next; 1023 f->next = f->next->next; 1024 } 1025 1026 dvbdmxfilter->state = DMX_STATE_FREE; 1027 spin_unlock_irq(&dvbdmx->lock); 1028 mutex_unlock(&dvbdmx->mutex); 1029 return 0; 1030} 1031 1032static int dvbdmx_allocate_section_feed(struct dmx_demux *demux, 1033 struct dmx_section_feed **feed, 1034 dmx_section_cb callback) 1035{ 1036 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; 1037 struct dvb_demux_feed *dvbdmxfeed; 1038 1039 if (mutex_lock_interruptible(&dvbdmx->mutex)) 1040 return -ERESTARTSYS; 1041 1042 if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) { 1043 mutex_unlock(&dvbdmx->mutex); 1044 return -EBUSY; 1045 } 1046 1047 dvbdmxfeed->type = DMX_TYPE_SEC; 1048 dvbdmxfeed->cb.sec = callback; 1049 dvbdmxfeed->demux = dvbdmx; 1050 dvbdmxfeed->pid = 0xffff; 1051 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base; 1052 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0; 1053 dvbdmxfeed->feed.sec.tsfeedp = 0; 1054 dvbdmxfeed->filter = NULL; 1055 dvbdmxfeed->buffer = NULL; 1056 1057 (*feed) = &dvbdmxfeed->feed.sec; 1058 (*feed)->is_filtering = 0; 1059 (*feed)->parent = demux; 1060 (*feed)->priv = NULL; 1061 1062 (*feed)->set = dmx_section_feed_set; 1063 (*feed)->allocate_filter = dmx_section_feed_allocate_filter; 1064 (*feed)->start_filtering = dmx_section_feed_start_filtering; 1065 (*feed)->stop_filtering = dmx_section_feed_stop_filtering; 1066 (*feed)->release_filter = dmx_section_feed_release_filter; 1067 1068 mutex_unlock(&dvbdmx->mutex); 1069 return 0; 1070} 1071 1072static int dvbdmx_release_section_feed(struct dmx_demux *demux, 1073 struct dmx_section_feed *feed) 1074{ 1075 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed; 1076 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux; 1077 1078 mutex_lock(&dvbdmx->mutex); 1079 1080 if (dvbdmxfeed->state == DMX_STATE_FREE) { 1081 mutex_unlock(&dvbdmx->mutex); 1082 return -EINVAL; 1083 } 1084#ifndef NOBUFS 1085 vfree(dvbdmxfeed->buffer); 1086 dvbdmxfeed->buffer = NULL; 1087#endif 1088 dvbdmxfeed->state = DMX_STATE_FREE; 1089 1090 dvb_demux_feed_del(dvbdmxfeed); 1091 1092 dvbdmxfeed->pid = 0xffff; 1093 1094 mutex_unlock(&dvbdmx->mutex); 1095 return 0; 1096} 1097 1098/****************************************************************************** 1099 * dvb_demux kernel data API calls 1100 ******************************************************************************/ 1101 1102static int dvbdmx_open(struct dmx_demux *demux) 1103{ 1104 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1105 1106 if (dvbdemux->users >= MAX_DVB_DEMUX_USERS) 1107 return -EUSERS; 1108 1109 dvbdemux->users++; 1110 return 0; 1111} 1112 1113static int dvbdmx_close(struct dmx_demux *demux) 1114{ 1115 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1116 1117 if (dvbdemux->users == 0) 1118 return -ENODEV; 1119 1120 dvbdemux->users--; 1121 return 0; 1122} 1123 1124static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count) 1125{ 1126 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1127 void *p; 1128 1129 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE)) 1130 return -EINVAL; 1131 1132 p = memdup_user(buf, count); 1133 if (IS_ERR(p)) 1134 return PTR_ERR(p); 1135 if (mutex_lock_interruptible(&dvbdemux->mutex)) { 1136 kfree(p); 1137 return -ERESTARTSYS; 1138 } 1139 dvb_dmx_swfilter(dvbdemux, p, count); 1140 kfree(p); 1141 mutex_unlock(&dvbdemux->mutex); 1142 1143 if (signal_pending(current)) 1144 return -EINTR; 1145 return count; 1146} 1147 1148static int dvbdmx_add_frontend(struct dmx_demux *demux, 1149 struct dmx_frontend *frontend) 1150{ 1151 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1152 struct list_head *head = &dvbdemux->frontend_list; 1153 1154 list_add(&(frontend->connectivity_list), head); 1155 1156 return 0; 1157} 1158 1159static int dvbdmx_remove_frontend(struct dmx_demux *demux, 1160 struct dmx_frontend *frontend) 1161{ 1162 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1163 struct list_head *pos, *n, *head = &dvbdemux->frontend_list; 1164 1165 list_for_each_safe(pos, n, head) { 1166 if (DMX_FE_ENTRY(pos) == frontend) { 1167 list_del(pos); 1168 return 0; 1169 } 1170 } 1171 1172 return -ENODEV; 1173} 1174 1175static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux) 1176{ 1177 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1178 1179 if (list_empty(&dvbdemux->frontend_list)) 1180 return NULL; 1181 1182 return &dvbdemux->frontend_list; 1183} 1184 1185static int dvbdmx_connect_frontend(struct dmx_demux *demux, 1186 struct dmx_frontend *frontend) 1187{ 1188 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1189 1190 if (demux->frontend) 1191 return -EINVAL; 1192 1193 mutex_lock(&dvbdemux->mutex); 1194 1195 demux->frontend = frontend; 1196 mutex_unlock(&dvbdemux->mutex); 1197 return 0; 1198} 1199 1200static int dvbdmx_disconnect_frontend(struct dmx_demux *demux) 1201{ 1202 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1203 1204 mutex_lock(&dvbdemux->mutex); 1205 1206 demux->frontend = NULL; 1207 mutex_unlock(&dvbdemux->mutex); 1208 return 0; 1209} 1210 1211static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids) 1212{ 1213 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux; 1214 1215 memcpy(pids, dvbdemux->pids, 5 * sizeof(u16)); 1216 return 0; 1217} 1218 1219int dvb_dmx_init(struct dvb_demux *dvbdemux) 1220{ 1221 int i; 1222 struct dmx_demux *dmx = &dvbdemux->dmx; 1223 1224 dvbdemux->cnt_storage = NULL; 1225 dvbdemux->users = 0; 1226 dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter)); 1227 1228 if (!dvbdemux->filter) 1229 return -ENOMEM; 1230 1231 dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); 1232 if (!dvbdemux->feed) { 1233 vfree(dvbdemux->filter); 1234 dvbdemux->filter = NULL; 1235 return -ENOMEM; 1236 } 1237 for (i = 0; i < dvbdemux->filternum; i++) { 1238 dvbdemux->filter[i].state = DMX_STATE_FREE; 1239 dvbdemux->filter[i].index = i; 1240 } 1241 for (i = 0; i < dvbdemux->feednum; i++) { 1242 dvbdemux->feed[i].state = DMX_STATE_FREE; 1243 dvbdemux->feed[i].index = i; 1244 } 1245 1246 dvbdemux->cnt_storage = vmalloc(MAX_PID + 1); 1247 if (!dvbdemux->cnt_storage) 1248 printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n"); 1249 1250 INIT_LIST_HEAD(&dvbdemux->frontend_list); 1251 1252 for (i = 0; i < DMX_TS_PES_OTHER; i++) { 1253 dvbdemux->pesfilter[i] = NULL; 1254 dvbdemux->pids[i] = 0xffff; 1255 } 1256 1257 INIT_LIST_HEAD(&dvbdemux->feed_list); 1258 1259 dvbdemux->playing = 0; 1260 dvbdemux->recording = 0; 1261 dvbdemux->tsbufp = 0; 1262 1263 if (!dvbdemux->check_crc32) 1264 dvbdemux->check_crc32 = dvb_dmx_crc32; 1265 1266 if (!dvbdemux->memcopy) 1267 dvbdemux->memcopy = dvb_dmx_memcopy; 1268 1269 dmx->frontend = NULL; 1270 dmx->priv = dvbdemux; 1271 dmx->open = dvbdmx_open; 1272 dmx->close = dvbdmx_close; 1273 dmx->write = dvbdmx_write; 1274 dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed; 1275 dmx->release_ts_feed = dvbdmx_release_ts_feed; 1276 dmx->allocate_section_feed = dvbdmx_allocate_section_feed; 1277 dmx->release_section_feed = dvbdmx_release_section_feed; 1278 1279 dmx->add_frontend = dvbdmx_add_frontend; 1280 dmx->remove_frontend = dvbdmx_remove_frontend; 1281 dmx->get_frontends = dvbdmx_get_frontends; 1282 dmx->connect_frontend = dvbdmx_connect_frontend; 1283 dmx->disconnect_frontend = dvbdmx_disconnect_frontend; 1284 dmx->get_pes_pids = dvbdmx_get_pes_pids; 1285 1286 mutex_init(&dvbdemux->mutex); 1287 spin_lock_init(&dvbdemux->lock); 1288 1289 return 0; 1290} 1291 1292EXPORT_SYMBOL(dvb_dmx_init); 1293 1294void dvb_dmx_release(struct dvb_demux *dvbdemux) 1295{ 1296 vfree(dvbdemux->cnt_storage); 1297 vfree(dvbdemux->filter); 1298 vfree(dvbdemux->feed); 1299} 1300 1301EXPORT_SYMBOL(dvb_dmx_release); 1302