drivers/media/dvb-core/dvb_demux.c

   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
  43 static int dvb_demux_tscheck;
  44 module_param(dvb_demux_tscheck, int, 0644);
  45 MODULE_PARM_DESC(dvb_demux_tscheck,
  46                 "enable transport stream continuity and TEI check");
  47
  48 static int dvb_demux_speedcheck;
  49 module_param(dvb_demux_speedcheck, int, 0644);
  50 MODULE_PARM_DESC(dvb_demux_speedcheck,
  51                 "enable transport stream speed check");
  52
  53 static int dvb_demux_feed_err_pkts = 1;
  54 module_param(dvb_demux_feed_err_pkts, int, 0644);
  55 MODULE_PARM_DESC(dvb_demux_feed_err_pkts,
  56                  "when set to 0, drop packets with the TEI bit set (1 by default)");
  57
  58 #define dprintk_tscheck(x...) do {                              \
  59                 if (dvb_demux_tscheck && printk_ratelimit())    \
  60                         printk(x);                              \
  61         } while (0)
  62
  63 /******************************************************************************
  64  * static inlined helper functions
  65  ******************************************************************************/
  66
  67 static inline u16 section_length(const u8 *buf)
  68 {
  69         return 3 + ((buf[1] & 0x0f) << 8) + buf[2];
  70 }
  71
  72 static inline u16 ts_pid(const u8 *buf)
  73 {
  74         return ((buf[1] & 0x1f) << 8) + buf[2];
  75 }
  76
  77 static inline u8 payload(const u8 *tsp)
  78 {
  79         if (!(tsp[3] & 0x10))   // no payload?
  80                 return 0;
  81
  82         if (tsp[3] & 0x20) {    // adaptation field?
  83                 if (tsp[4] > 183)       // corrupted data?
  84                         return 0;
  85                 else
  86                         return 184 - 1 - tsp[4];
  87         }
  88
  89         return 184;
  90 }
  91
  92 static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len)
  93 {
  94         return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len));
  95 }
  96
  97 static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s,
  98                             size_t len)
  99 {
 100         memcpy(d, s, len);
 101 }
 102
 103 /******************************************************************************
 104  * Software filter functions
 105  ******************************************************************************/
 106
 107 static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed,
 108                                            const u8 *buf)
 109 {
 110         int count = payload(buf);
 111         int p;
 112         //int ccok;
 113         //u8 cc;
 114
 115         if (count == 0)
 116                 return -1;
 117
 118         p = 188 - count;
 119
 120         /*
 121         cc = buf[3] & 0x0f;
 122         ccok = ((feed->cc + 1) & 0x0f) == cc;
 123         feed->cc = cc;
 124         if (!ccok)
 125                 printk("missed packet!\n");
 126         */
 127
 128         if (buf[1] & 0x40)      // PUSI ?
 129                 feed->peslen = 0xfffa;
 130
 131         feed->peslen += count;
 132
 133         return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts);
 134 }
 135
 136 static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed,
 137                                           struct dvb_demux_filter *f)
 138 {
 139         u8 neq = 0;
 140         int i;
 141
 142         for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
 143                 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
 144
 145                 if (f->maskandmode[i] & xor)
 146                         return 0;
 147
 148                 neq |= f->maskandnotmode[i] & xor;
 149         }
 150
 151         if (f->doneq && !neq)
 152                 return 0;
 153
 154         return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen,
 155                             NULL, 0, &f->filter);
 156 }
 157
 158 static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed)
 159 {
 160         struct dvb_demux *demux = feed->demux;
 161         struct dvb_demux_filter *f = feed->filter;
 162         struct dmx_section_feed *sec = &feed->feed.sec;
 163         int section_syntax_indicator;
 164
 165         if (!sec->is_filtering)
 166                 return 0;
 167
 168         if (!f)
 169                 return 0;
 170
 171         if (sec->check_crc) {
 172                 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
 173                 if (section_syntax_indicator &&
 174                     demux->check_crc32(feed, sec->secbuf, sec->seclen))
 175                         return -1;
 176         }
 177
 178         do {
 179                 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
 180                         return -1;
 181         } while ((f = f->next) && sec->is_filtering);
 182
 183         sec->seclen = 0;
 184
 185         return 0;
 186 }
 187
 188 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
 189 {
 190         struct dmx_section_feed *sec = &feed->feed.sec;
 191
 192 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
 193         if (sec->secbufp < sec->tsfeedp) {
 194                 int i, n = sec->tsfeedp - sec->secbufp;
 195
 196                 /*
 197                  * Section padding is done with 0xff bytes entirely.
 198                  * Due to speed reasons, we won't check all of them
 199                  * but just first and last.
 200                  */
 201                 if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) {
 202                         printk("dvb_demux.c section ts padding loss: %d/%d\n",
 203                                n, sec->tsfeedp);
 204                         printk("dvb_demux.c pad data:");
 205                         for (i = 0; i < n; i++)
 206                                 printk(" %02x", sec->secbuf[i]);
 207                         printk("\n");
 208                 }
 209         }
 210 #endif
 211
 212         sec->tsfeedp = sec->secbufp = sec->seclen = 0;
 213         sec->secbuf = sec->secbuf_base;
 214 }
 215
 216 /*
 217  * Losless Section Demux 1.4.1 by Emard
 218  * Valsecchi Patrick:
 219  *  - middle of section A  (no PUSI)
 220  *  - end of section A and start of section B
 221  *    (with PUSI pointing to the start of the second section)
 222  *
 223  *  In this case, without feed->pusi_seen you'll receive a garbage section
 224  *  consisting of the end of section A. Basically because tsfeedp
 225  *  is incemented and the use=0 condition is not raised
 226  *  when the second packet arrives.
 227  *
 228  * Fix:
 229  * when demux is started, let feed->pusi_seen = 0 to
 230  * prevent initial feeding of garbage from the end of
 231  * previous section. When you for the first time see PUSI=1
 232  * then set feed->pusi_seen = 1
 233  */
 234 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed,
 235                                               const u8 *buf, u8 len)
 236 {
 237         struct dvb_demux *demux = feed->demux;
 238         struct dmx_section_feed *sec = &feed->feed.sec;
 239         u16 limit, seclen, n;
 240
 241         if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
 242                 return 0;
 243
 244         if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) {
 245 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
 246                 printk("dvb_demux.c section buffer full loss: %d/%d\n",
 247                        sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE,
 248                        DMX_MAX_SECFEED_SIZE);
 249 #endif
 250                 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
 251         }
 252
 253         if (len <= 0)
 254                 return 0;
 255
 256         demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
 257         sec->tsfeedp += len;
 258
 259         /*
 260          * Dump all the sections we can find in the data (Emard)
 261          */
 262         limit = sec->tsfeedp;
 263         if (limit > DMX_MAX_SECFEED_SIZE)
 264                 return -1;      /* internal error should never happen */
 265
 266         /* to be sure always set secbuf */
 267         sec->secbuf = sec->secbuf_base + sec->secbufp;
 268
 269         for (n = 0; sec->secbufp + 2 < limit; n++) {
 270                 seclen = section_length(sec->secbuf);
 271                 if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE
 272                     || seclen + sec->secbufp > limit)
 273                         return 0;
 274                 sec->seclen = seclen;
 275                 sec->crc_val = ~0;
 276                 /* dump [secbuf .. secbuf+seclen) */
 277                 if (feed->pusi_seen)
 278                         dvb_dmx_swfilter_section_feed(feed);
 279 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
 280                 else
 281                         printk("dvb_demux.c pusi not seen, discarding section data\n");
 282 #endif
 283                 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
 284                 sec->secbuf += seclen;  /* redundant but saves pointer arithmetic */
 285         }
 286
 287         return 0;
 288 }
 289
 290 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
 291                                            const u8 *buf)
 292 {
 293         u8 p, count;
 294         int ccok, dc_i = 0;
 295         u8 cc;
 296
 297         count = payload(buf);
 298
 299         if (count == 0)         /* count == 0 if no payload or out of range */
 300                 return -1;
 301
 302         p = 188 - count;        /* payload start */
 303
 304         cc = buf[3] & 0x0f;
 305         ccok = ((feed->cc + 1) & 0x0f) == cc;
 306         feed->cc = cc;
 307
 308         if (buf[3] & 0x20) {
 309                 /* adaption field present, check for discontinuity_indicator */
 310                 if ((buf[4] > 0) && (buf[5] & 0x80))
 311                         dc_i = 1;
 312         }
 313
 314         if (!ccok || dc_i) {
 315 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
 316                 printk("dvb_demux.c discontinuity detected %d bytes lost\n",
 317                        count);
 318                 /*
 319                  * those bytes under sume circumstances will again be reported
 320                  * in the following dvb_dmx_swfilter_section_new
 321                  */
 322 #endif
 323                 /*
 324                  * Discontinuity detected. Reset pusi_seen = 0 to
 325                  * stop feeding of suspicious data until next PUSI=1 arrives
 326                  */
 327                 feed->pusi_seen = 0;
 328                 dvb_dmx_swfilter_section_new(feed);
 329         }
 330
 331         if (buf[1] & 0x40) {
 332                 /* PUSI=1 (is set), section boundary is here */
 333                 if (count > 1 && buf[p] < count) {
 334                         const u8 *before = &buf[p + 1];
 335                         u8 before_len = buf[p];
 336                         const u8 *after = &before[before_len];
 337                         u8 after_len = count - 1 - before_len;
 338
 339                         dvb_dmx_swfilter_section_copy_dump(feed, before,
 340                                                            before_len);
 341                         /* before start of new section, set pusi_seen = 1 */
 342                         feed->pusi_seen = 1;
 343                         dvb_dmx_swfilter_section_new(feed);
 344                         dvb_dmx_swfilter_section_copy_dump(feed, after,
 345                                                            after_len);
 346                 }
 347 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
 348                 else if (count > 0)
 349                         printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
 350 #endif
 351         } else {
 352                 /* PUSI=0 (is not set), no section boundary */
 353                 dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count);
 354         }
 355
 356         return 0;
 357 }
 358
 359 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed,
 360                                                 const u8 *buf)
 361 {
 362         switch (feed->type) {
 363         case DMX_TYPE_TS:
 364                 if (!feed->feed.ts.is_filtering)
 365                         break;
 366                 if (feed->ts_type & TS_PACKET) {
 367                         if (feed->ts_type & TS_PAYLOAD_ONLY)
 368                                 dvb_dmx_swfilter_payload(feed, buf);
 369                         else
 370                                 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
 371                 }
 372                 if (feed->ts_type & TS_DECODER)
 373                         if (feed->demux->write_to_decoder)
 374                                 feed->demux->write_to_decoder(feed, buf, 188);
 375                 break;
 376
 377         case DMX_TYPE_SEC:
 378                 if (!feed->feed.sec.is_filtering)
 379                         break;
 380                 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
 381                         feed->feed.sec.seclen = feed->feed.sec.secbufp = 0;
 382                 break;
 383
 384         default:
 385                 break;
 386         }
 387 }
 388
 389 #define DVR_FEED(f)                                                     \
 390         (((f)->type == DMX_TYPE_TS) &&                                  \
 391         ((f)->feed.ts.is_filtering) &&                                  \
 392         (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET))
 393
 394 static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
 395 {
 396         struct dvb_demux_feed *feed;
 397         u16 pid = ts_pid(buf);
 398         int dvr_done = 0;
 399
 400         if (dvb_demux_speedcheck) {
 401                 ktime_t cur_time;
 402                 u64 speed_bytes, speed_timedelta;
 403
 404                 demux->speed_pkts_cnt++;
 405
 406                 /* show speed every SPEED_PKTS_INTERVAL packets */
 407                 if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) {
 408                         cur_time = ktime_get();
 409
 410                         if (ktime_to_ns(demux->speed_last_time) != 0) {
 411                                 speed_bytes = (u64)demux->speed_pkts_cnt
 412                                         * 188 * 8;
 413                                 /* convert to 1024 basis */
 414                                 speed_bytes = 1000 * div64_u64(speed_bytes,
 415                                                 1024);
 416                                 speed_timedelta = ktime_ms_delta(cur_time,
 417                                                         demux->speed_last_time);
 418                                 printk(KERN_INFO "TS speed %llu Kbits/sec \n",
 419                                                 div64_u64(speed_bytes,
 420                                                         speed_timedelta));
 421                         }
 422
 423                         demux->speed_last_time = cur_time;
 424                         demux->speed_pkts_cnt = 0;
 425                 }
 426         }
 427
 428         if (buf[1] & 0x80) {
 429                 dprintk_tscheck("TEI detected. "
 430                                 "PID=0x%x data1=0x%x\n",
 431                                 pid, buf[1]);
 432                 /* data in this packet can't be trusted - drop it unless
 433                  * module option dvb_demux_feed_err_pkts is set */
 434                 if (!dvb_demux_feed_err_pkts)
 435                         return;
 436         } else /* if TEI bit is set, pid may be wrong- skip pkt counter */
 437                 if (demux->cnt_storage && dvb_demux_tscheck) {
 438                         /* check pkt counter */
 439                         if (pid < MAX_PID) {
 440                                 if (buf[3] & 0x10)
 441                                         demux->cnt_storage[pid] =
 442                                                 (demux->cnt_storage[pid] + 1) & 0xf;
 443
 444                                 if ((buf[3] & 0xf) != demux->cnt_storage[pid]) {
 445                                         dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n",
 446                                                 pid, demux->cnt_storage[pid],
 447                                                 buf[3] & 0xf);
 448                                         demux->cnt_storage[pid] = buf[3] & 0xf;
 449                                 }
 450                         }
 451                         /* end check */
 452                 }
 453
 454         list_for_each_entry(feed, &demux->feed_list, list_head) {
 455                 if ((feed->pid != pid) && (feed->pid != 0x2000))
 456                         continue;
 457
 458                 /* copy each packet only once to the dvr device, even
 459                  * if a PID is in multiple filters (e.g. video + PCR) */
 460                 if ((DVR_FEED(feed)) && (dvr_done++))
 461                         continue;
 462
 463                 if (feed->pid == pid)
 464                         dvb_dmx_swfilter_packet_type(feed, buf);
 465                 else if (feed->pid == 0x2000)
 466                         feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
 467         }
 468 }
 469
 470 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
 471                               size_t count)
 472 {
 473         unsigned long flags;
 474
 475         spin_lock_irqsave(&demux->lock, flags);
 476
 477         while (count--) {
 478                 if (buf[0] == 0x47)
 479                         dvb_dmx_swfilter_packet(demux, buf);
 480                 buf += 188;
 481         }
 482
 483         spin_unlock_irqrestore(&demux->lock, flags);
 484 }
 485
 486 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
 487
 488 static inline int find_next_packet(const u8 *buf, int pos, size_t count,
 489                                    const int pktsize)
 490 {
 491         int start = pos, lost;
 492
 493         while (pos < count) {
 494                 if (buf[pos] == 0x47 ||
 495                     (pktsize == 204 && buf[pos] == 0xB8))
 496                         break;
 497                 pos++;
 498         }
 499
 500         lost = pos - start;
 501         if (lost) {
 502                 /* This garbage is part of a valid packet? */
 503                 int backtrack = pos - pktsize;
 504                 if (backtrack >= 0 && (buf[backtrack] == 0x47 ||
 505                     (pktsize == 204 && buf[backtrack] == 0xB8)))
 506                         return backtrack;
 507         }
 508
 509         return pos;
 510 }
 511
 512 /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */
 513 static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
 514                 size_t count, const int pktsize)
 515 {
 516         int p = 0, i, j;
 517         const u8 *q;
 518         unsigned long flags;
 519
 520         spin_lock_irqsave(&demux->lock, flags);
 521
 522         if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
 523                 i = demux->tsbufp;
 524                 j = pktsize - i;
 525                 if (count < j) {
 526                         memcpy(&demux->tsbuf[i], buf, count);
 527                         demux->tsbufp += count;
 528                         goto bailout;
 529                 }
 530                 memcpy(&demux->tsbuf[i], buf, j);
 531                 if (demux->tsbuf[0] == 0x47) /* double check */
 532                         dvb_dmx_swfilter_packet(demux, demux->tsbuf);
 533                 demux->tsbufp = 0;
 534                 p += j;
 535         }
 536
 537         while (1) {
 538                 p = find_next_packet(buf, p, count, pktsize);
 539                 if (p >= count)
 540                         break;
 541                 if (count - p < pktsize)
 542                         break;
 543
 544                 q = &buf[p];
 545
 546                 if (pktsize == 204 && (*q == 0xB8)) {
 547                         memcpy(demux->tsbuf, q, 188);
 548                         demux->tsbuf[0] = 0x47;
 549                         q = demux->tsbuf;
 550                 }
 551                 dvb_dmx_swfilter_packet(demux, q);
 552                 p += pktsize;
 553         }
 554
 555         i = count - p;
 556         if (i) {
 557                 memcpy(demux->tsbuf, &buf[p], i);
 558                 demux->tsbufp = i;
 559                 if (pktsize == 204 && demux->tsbuf[0] == 0xB8)
 560                         demux->tsbuf[0] = 0x47;
 561         }
 562
 563 bailout:
 564         spin_unlock_irqrestore(&demux->lock, flags);
 565 }
 566
 567 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
 568 {
 569         _dvb_dmx_swfilter(demux, buf, count, 188);
 570 }
 571 EXPORT_SYMBOL(dvb_dmx_swfilter);
 572
 573 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
 574 {
 575         _dvb_dmx_swfilter(demux, buf, count, 204);
 576 }
 577 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
 578
 579 void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count)
 580 {
 581         unsigned long flags;
 582
 583         spin_lock_irqsave(&demux->lock, flags);
 584
 585         demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts);
 586
 587         spin_unlock_irqrestore(&demux->lock, flags);
 588 }
 589 EXPORT_SYMBOL(dvb_dmx_swfilter_raw);
 590
 591 static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux)
 592 {
 593         int i;
 594
 595         for (i = 0; i < demux->filternum; i++)
 596                 if (demux->filter[i].state == DMX_STATE_FREE)
 597                         break;
 598
 599         if (i == demux->filternum)
 600                 return NULL;
 601
 602         demux->filter[i].state = DMX_STATE_ALLOCATED;
 603
 604         return &demux->filter[i];
 605 }
 606
 607 static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux)
 608 {
 609         int i;
 610
 611         for (i = 0; i < demux->feednum; i++)
 612                 if (demux->feed[i].state == DMX_STATE_FREE)
 613                         break;
 614
 615         if (i == demux->feednum)
 616                 return NULL;
 617
 618         demux->feed[i].state = DMX_STATE_ALLOCATED;
 619
 620         return &demux->feed[i];
 621 }
 622
 623 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
 624 {
 625         struct dvb_demux_feed *entry;
 626
 627         list_for_each_entry(entry, &feed->demux->feed_list, list_head)
 628                 if (entry == feed)
 629                         return 1;
 630
 631         return 0;
 632 }
 633
 634 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
 635 {
 636         spin_lock_irq(&feed->demux->lock);
 637         if (dvb_demux_feed_find(feed)) {
 638                 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
 639                        __func__, feed->type, feed->state, feed->pid);
 640                 goto out;
 641         }
 642
 643         list_add(&feed->list_head, &feed->demux->feed_list);
 644 out:
 645         spin_unlock_irq(&feed->demux->lock);
 646 }
 647
 648 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
 649 {
 650         spin_lock_irq(&feed->demux->lock);
 651         if (!(dvb_demux_feed_find(feed))) {
 652                 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
 653                        __func__, feed->type, feed->state, feed->pid);
 654                 goto out;
 655         }
 656
 657         list_del(&feed->list_head);
 658 out:
 659         spin_unlock_irq(&feed->demux->lock);
 660 }
 661
 662 static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type,
 663                            enum dmx_ts_pes pes_type,
 664                            size_t circular_buffer_size, ktime_t timeout)
 665 {
 666         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 667         struct dvb_demux *demux = feed->demux;
 668
 669         if (pid > DMX_MAX_PID)
 670                 return -EINVAL;
 671
 672         if (mutex_lock_interruptible(&demux->mutex))
 673                 return -ERESTARTSYS;
 674
 675         if (ts_type & TS_DECODER) {
 676                 if (pes_type >= DMX_PES_OTHER) {
 677                         mutex_unlock(&demux->mutex);
 678                         return -EINVAL;
 679                 }
 680
 681                 if (demux->pesfilter[pes_type] &&
 682                     demux->pesfilter[pes_type] != feed) {
 683                         mutex_unlock(&demux->mutex);
 684                         return -EINVAL;
 685                 }
 686
 687                 demux->pesfilter[pes_type] = feed;
 688                 demux->pids[pes_type] = pid;
 689         }
 690
 691         dvb_demux_feed_add(feed);
 692
 693         feed->pid = pid;
 694         feed->buffer_size = circular_buffer_size;
 695         feed->timeout = timeout;
 696         feed->ts_type = ts_type;
 697         feed->pes_type = pes_type;
 698
 699         if (feed->buffer_size) {
 700 #ifdef NOBUFS
 701                 feed->buffer = NULL;
 702 #else
 703                 feed->buffer = vmalloc(feed->buffer_size);
 704                 if (!feed->buffer) {
 705                         mutex_unlock(&demux->mutex);
 706                         return -ENOMEM;
 707                 }
 708 #endif
 709         }
 710
 711         feed->state = DMX_STATE_READY;
 712         mutex_unlock(&demux->mutex);
 713
 714         return 0;
 715 }
 716
 717 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed)
 718 {
 719         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 720         struct dvb_demux *demux = feed->demux;
 721         int ret;
 722
 723         if (mutex_lock_interruptible(&demux->mutex))
 724                 return -ERESTARTSYS;
 725
 726         if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
 727                 mutex_unlock(&demux->mutex);
 728                 return -EINVAL;
 729         }
 730
 731         if (!demux->start_feed) {
 732                 mutex_unlock(&demux->mutex);
 733                 return -ENODEV;
 734         }
 735
 736         if ((ret = demux->start_feed(feed)) < 0) {
 737                 mutex_unlock(&demux->mutex);
 738                 return ret;
 739         }
 740
 741         spin_lock_irq(&demux->lock);
 742         ts_feed->is_filtering = 1;
 743         feed->state = DMX_STATE_GO;
 744         spin_unlock_irq(&demux->lock);
 745         mutex_unlock(&demux->mutex);
 746
 747         return 0;
 748 }
 749
 750 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed)
 751 {
 752         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 753         struct dvb_demux *demux = feed->demux;
 754         int ret;
 755
 756         mutex_lock(&demux->mutex);
 757
 758         if (feed->state < DMX_STATE_GO) {
 759                 mutex_unlock(&demux->mutex);
 760                 return -EINVAL;
 761         }
 762
 763         if (!demux->stop_feed) {
 764                 mutex_unlock(&demux->mutex);
 765                 return -ENODEV;
 766         }
 767
 768         ret = demux->stop_feed(feed);
 769
 770         spin_lock_irq(&demux->lock);
 771         ts_feed->is_filtering = 0;
 772         feed->state = DMX_STATE_ALLOCATED;
 773         spin_unlock_irq(&demux->lock);
 774         mutex_unlock(&demux->mutex);
 775
 776         return ret;
 777 }
 778
 779 static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx,
 780                                    struct dmx_ts_feed **ts_feed,
 781                                    dmx_ts_cb callback)
 782 {
 783         struct dvb_demux *demux = (struct dvb_demux *)dmx;
 784         struct dvb_demux_feed *feed;
 785
 786         if (mutex_lock_interruptible(&demux->mutex))
 787                 return -ERESTARTSYS;
 788
 789         if (!(feed = dvb_dmx_feed_alloc(demux))) {
 790                 mutex_unlock(&demux->mutex);
 791                 return -EBUSY;
 792         }
 793
 794         feed->type = DMX_TYPE_TS;
 795         feed->cb.ts = callback;
 796         feed->demux = demux;
 797         feed->pid = 0xffff;
 798         feed->peslen = 0xfffa;
 799         feed->buffer = NULL;
 800
 801         (*ts_feed) = &feed->feed.ts;
 802         (*ts_feed)->parent = dmx;
 803         (*ts_feed)->priv = NULL;
 804         (*ts_feed)->is_filtering = 0;
 805         (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
 806         (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
 807         (*ts_feed)->set = dmx_ts_feed_set;
 808
 809         if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
 810                 feed->state = DMX_STATE_FREE;
 811                 mutex_unlock(&demux->mutex);
 812                 return -EBUSY;
 813         }
 814
 815         feed->filter->type = DMX_TYPE_TS;
 816         feed->filter->feed = feed;
 817         feed->filter->state = DMX_STATE_READY;
 818
 819         mutex_unlock(&demux->mutex);
 820
 821         return 0;
 822 }
 823
 824 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx,
 825                                   struct dmx_ts_feed *ts_feed)
 826 {
 827         struct dvb_demux *demux = (struct dvb_demux *)dmx;
 828         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 829
 830         mutex_lock(&demux->mutex);
 831
 832         if (feed->state == DMX_STATE_FREE) {
 833                 mutex_unlock(&demux->mutex);
 834                 return -EINVAL;
 835         }
 836 #ifndef NOBUFS
 837         vfree(feed->buffer);
 838         feed->buffer = NULL;
 839 #endif
 840
 841         feed->state = DMX_STATE_FREE;
 842         feed->filter->state = DMX_STATE_FREE;
 843
 844         dvb_demux_feed_del(feed);
 845
 846         feed->pid = 0xffff;
 847
 848         if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER)
 849                 demux->pesfilter[feed->pes_type] = NULL;
 850
 851         mutex_unlock(&demux->mutex);
 852         return 0;
 853 }
 854
 855 /******************************************************************************
 856  * dmx_section_feed API calls
 857  ******************************************************************************/
 858
 859 static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed,
 860                                             struct dmx_section_filter **filter)
 861 {
 862         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 863         struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
 864         struct dvb_demux_filter *dvbdmxfilter;
 865
 866         if (mutex_lock_interruptible(&dvbdemux->mutex))
 867                 return -ERESTARTSYS;
 868
 869         dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
 870         if (!dvbdmxfilter) {
 871                 mutex_unlock(&dvbdemux->mutex);
 872                 return -EBUSY;
 873         }
 874
 875         spin_lock_irq(&dvbdemux->lock);
 876         *filter = &dvbdmxfilter->filter;
 877         (*filter)->parent = feed;
 878         (*filter)->priv = NULL;
 879         dvbdmxfilter->feed = dvbdmxfeed;
 880         dvbdmxfilter->type = DMX_TYPE_SEC;
 881         dvbdmxfilter->state = DMX_STATE_READY;
 882         dvbdmxfilter->next = dvbdmxfeed->filter;
 883         dvbdmxfeed->filter = dvbdmxfilter;
 884         spin_unlock_irq(&dvbdemux->lock);
 885
 886         mutex_unlock(&dvbdemux->mutex);
 887         return 0;
 888 }
 889
 890 static int dmx_section_feed_set(struct dmx_section_feed *feed,
 891                                 u16 pid, size_t circular_buffer_size,
 892                                 int check_crc)
 893 {
 894         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 895         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 896
 897         if (pid > 0x1fff)
 898                 return -EINVAL;
 899
 900         if (mutex_lock_interruptible(&dvbdmx->mutex))
 901                 return -ERESTARTSYS;
 902
 903         dvb_demux_feed_add(dvbdmxfeed);
 904
 905         dvbdmxfeed->pid = pid;
 906         dvbdmxfeed->buffer_size = circular_buffer_size;
 907         dvbdmxfeed->feed.sec.check_crc = check_crc;
 908
 909 #ifdef NOBUFS
 910         dvbdmxfeed->buffer = NULL;
 911 #else
 912         dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size);
 913         if (!dvbdmxfeed->buffer) {
 914                 mutex_unlock(&dvbdmx->mutex);
 915                 return -ENOMEM;
 916         }
 917 #endif
 918
 919         dvbdmxfeed->state = DMX_STATE_READY;
 920         mutex_unlock(&dvbdmx->mutex);
 921         return 0;
 922 }
 923
 924 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
 925 {
 926         int i;
 927         struct dvb_demux_filter *f;
 928         struct dmx_section_filter *sf;
 929         u8 mask, mode, doneq;
 930
 931         if (!(f = dvbdmxfeed->filter))
 932                 return;
 933         do {
 934                 sf = &f->filter;
 935                 doneq = 0;
 936                 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
 937                         mode = sf->filter_mode[i];
 938                         mask = sf->filter_mask[i];
 939                         f->maskandmode[i] = mask & mode;
 940                         doneq |= f->maskandnotmode[i] = mask & ~mode;
 941                 }
 942                 f->doneq = doneq ? 1 : 0;
 943         } while ((f = f->next));
 944 }
 945
 946 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
 947 {
 948         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 949         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 950         int ret;
 951
 952         if (mutex_lock_interruptible(&dvbdmx->mutex))
 953                 return -ERESTARTSYS;
 954
 955         if (feed->is_filtering) {
 956                 mutex_unlock(&dvbdmx->mutex);
 957                 return -EBUSY;
 958         }
 959
 960         if (!dvbdmxfeed->filter) {
 961                 mutex_unlock(&dvbdmx->mutex);
 962                 return -EINVAL;
 963         }
 964
 965         dvbdmxfeed->feed.sec.tsfeedp = 0;
 966         dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
 967         dvbdmxfeed->feed.sec.secbufp = 0;
 968         dvbdmxfeed->feed.sec.seclen = 0;
 969
 970         if (!dvbdmx->start_feed) {
 971                 mutex_unlock(&dvbdmx->mutex);
 972                 return -ENODEV;
 973         }
 974
 975         prepare_secfilters(dvbdmxfeed);
 976
 977         if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
 978                 mutex_unlock(&dvbdmx->mutex);
 979                 return ret;
 980         }
 981
 982         spin_lock_irq(&dvbdmx->lock);
 983         feed->is_filtering = 1;
 984         dvbdmxfeed->state = DMX_STATE_GO;
 985         spin_unlock_irq(&dvbdmx->lock);
 986
 987         mutex_unlock(&dvbdmx->mutex);
 988         return 0;
 989 }
 990
 991 static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed)
 992 {
 993         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 994         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 995         int ret;
 996
 997         mutex_lock(&dvbdmx->mutex);
 998
 999         if (!dvbdmx->stop_feed) {
1000                 mutex_unlock(&dvbdmx->mutex);
1001                 return -ENODEV;
1002         }
1003
1004         ret = dvbdmx->stop_feed(dvbdmxfeed);
1005
1006         spin_lock_irq(&dvbdmx->lock);
1007         dvbdmxfeed->state = DMX_STATE_READY;
1008         feed->is_filtering = 0;
1009         spin_unlock_irq(&dvbdmx->lock);
1010
1011         mutex_unlock(&dvbdmx->mutex);
1012         return ret;
1013 }
1014
1015 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
1016                                            struct dmx_section_filter *filter)
1017 {
1018         struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f;
1019         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1020         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
1021
1022         mutex_lock(&dvbdmx->mutex);
1023
1024         if (dvbdmxfilter->feed != dvbdmxfeed) {
1025                 mutex_unlock(&dvbdmx->mutex);
1026                 return -EINVAL;
1027         }
1028
1029         if (feed->is_filtering) {
1030                 /* release dvbdmx->mutex as far as it is
1031                    acquired by stop_filtering() itself */
1032                 mutex_unlock(&dvbdmx->mutex);
1033                 feed->stop_filtering(feed);
1034                 mutex_lock(&dvbdmx->mutex);
1035         }
1036
1037         spin_lock_irq(&dvbdmx->lock);
1038         f = dvbdmxfeed->filter;
1039
1040         if (f == dvbdmxfilter) {
1041                 dvbdmxfeed->filter = dvbdmxfilter->next;
1042         } else {
1043                 while (f->next != dvbdmxfilter)
1044                         f = f->next;
1045                 f->next = f->next->next;
1046         }
1047
1048         dvbdmxfilter->state = DMX_STATE_FREE;
1049         spin_unlock_irq(&dvbdmx->lock);
1050         mutex_unlock(&dvbdmx->mutex);
1051         return 0;
1052 }
1053
1054 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
1055                                         struct dmx_section_feed **feed,
1056                                         dmx_section_cb callback)
1057 {
1058         struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1059         struct dvb_demux_feed *dvbdmxfeed;
1060
1061         if (mutex_lock_interruptible(&dvbdmx->mutex))
1062                 return -ERESTARTSYS;
1063
1064         if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
1065                 mutex_unlock(&dvbdmx->mutex);
1066                 return -EBUSY;
1067         }
1068
1069         dvbdmxfeed->type = DMX_TYPE_SEC;
1070         dvbdmxfeed->cb.sec = callback;
1071         dvbdmxfeed->demux = dvbdmx;
1072         dvbdmxfeed->pid = 0xffff;
1073         dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1074         dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1075         dvbdmxfeed->feed.sec.tsfeedp = 0;
1076         dvbdmxfeed->filter = NULL;
1077         dvbdmxfeed->buffer = NULL;
1078
1079         (*feed) = &dvbdmxfeed->feed.sec;
1080         (*feed)->is_filtering = 0;
1081         (*feed)->parent = demux;
1082         (*feed)->priv = NULL;
1083
1084         (*feed)->set = dmx_section_feed_set;
1085         (*feed)->allocate_filter = dmx_section_feed_allocate_filter;
1086         (*feed)->start_filtering = dmx_section_feed_start_filtering;
1087         (*feed)->stop_filtering = dmx_section_feed_stop_filtering;
1088         (*feed)->release_filter = dmx_section_feed_release_filter;
1089
1090         mutex_unlock(&dvbdmx->mutex);
1091         return 0;
1092 }
1093
1094 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1095                                        struct dmx_section_feed *feed)
1096 {
1097         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1098         struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1099
1100         mutex_lock(&dvbdmx->mutex);
1101
1102         if (dvbdmxfeed->state == DMX_STATE_FREE) {
1103                 mutex_unlock(&dvbdmx->mutex);
1104                 return -EINVAL;
1105         }
1106 #ifndef NOBUFS
1107         vfree(dvbdmxfeed->buffer);
1108         dvbdmxfeed->buffer = NULL;
1109 #endif
1110         dvbdmxfeed->state = DMX_STATE_FREE;
1111
1112         dvb_demux_feed_del(dvbdmxfeed);
1113
1114         dvbdmxfeed->pid = 0xffff;
1115
1116         mutex_unlock(&dvbdmx->mutex);
1117         return 0;
1118 }
1119
1120 /******************************************************************************
1121  * dvb_demux kernel data API calls
1122  ******************************************************************************/
1123
1124 static int dvbdmx_open(struct dmx_demux *demux)
1125 {
1126         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1127
1128         if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
1129                 return -EUSERS;
1130
1131         dvbdemux->users++;
1132         return 0;
1133 }
1134
1135 static int dvbdmx_close(struct dmx_demux *demux)
1136 {
1137         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1138
1139         if (dvbdemux->users == 0)
1140                 return -ENODEV;
1141
1142         dvbdemux->users--;
1143         //FIXME: release any unneeded resources if users==0
1144         return 0;
1145 }
1146
1147 static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count)
1148 {
1149         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1150         void *p;
1151
1152         if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1153                 return -EINVAL;
1154
1155         p = memdup_user(buf, count);
1156         if (IS_ERR(p))
1157                 return PTR_ERR(p);
1158         if (mutex_lock_interruptible(&dvbdemux->mutex)) {
1159                 kfree(p);
1160                 return -ERESTARTSYS;
1161         }
1162         dvb_dmx_swfilter(dvbdemux, p, count);
1163         kfree(p);
1164         mutex_unlock(&dvbdemux->mutex);
1165
1166         if (signal_pending(current))
1167                 return -EINTR;
1168         return count;
1169 }
1170
1171 static int dvbdmx_add_frontend(struct dmx_demux *demux,
1172                                struct dmx_frontend *frontend)
1173 {
1174         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1175         struct list_head *head = &dvbdemux->frontend_list;
1176
1177         list_add(&(frontend->connectivity_list), head);
1178
1179         return 0;
1180 }
1181
1182 static int dvbdmx_remove_frontend(struct dmx_demux *demux,
1183                                   struct dmx_frontend *frontend)
1184 {
1185         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1186         struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
1187
1188         list_for_each_safe(pos, n, head) {
1189                 if (DMX_FE_ENTRY(pos) == frontend) {
1190                         list_del(pos);
1191                         return 0;
1192                 }
1193         }
1194
1195         return -ENODEV;
1196 }
1197
1198 static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux)
1199 {
1200         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1201
1202         if (list_empty(&dvbdemux->frontend_list))
1203                 return NULL;
1204
1205         return &dvbdemux->frontend_list;
1206 }
1207
1208 static int dvbdmx_connect_frontend(struct dmx_demux *demux,
1209                                    struct dmx_frontend *frontend)
1210 {
1211         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1212
1213         if (demux->frontend)
1214                 return -EINVAL;
1215
1216         mutex_lock(&dvbdemux->mutex);
1217
1218         demux->frontend = frontend;
1219         mutex_unlock(&dvbdemux->mutex);
1220         return 0;
1221 }
1222
1223 static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1224 {
1225         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1226
1227         mutex_lock(&dvbdemux->mutex);
1228
1229         demux->frontend = NULL;
1230         mutex_unlock(&dvbdemux->mutex);
1231         return 0;
1232 }
1233
1234 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids)
1235 {
1236         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1237
1238         memcpy(pids, dvbdemux->pids, 5 * sizeof(u16));
1239         return 0;
1240 }
1241
1242 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1243 {
1244         int i;
1245         struct dmx_demux *dmx = &dvbdemux->dmx;
1246
1247         dvbdemux->cnt_storage = NULL;
1248         dvbdemux->users = 0;
1249         dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter));
1250
1251         if (!dvbdemux->filter)
1252                 return -ENOMEM;
1253
1254         dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed));
1255         if (!dvbdemux->feed) {
1256                 vfree(dvbdemux->filter);
1257                 dvbdemux->filter = NULL;
1258                 return -ENOMEM;
1259         }
1260         for (i = 0; i < dvbdemux->filternum; i++) {
1261                 dvbdemux->filter[i].state = DMX_STATE_FREE;
1262                 dvbdemux->filter[i].index = i;
1263         }
1264         for (i = 0; i < dvbdemux->feednum; i++) {
1265                 dvbdemux->feed[i].state = DMX_STATE_FREE;
1266                 dvbdemux->feed[i].index = i;
1267         }
1268
1269         dvbdemux->cnt_storage = vmalloc(MAX_PID + 1);
1270         if (!dvbdemux->cnt_storage)
1271                 printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n");
1272
1273         INIT_LIST_HEAD(&dvbdemux->frontend_list);
1274
1275         for (i = 0; i < DMX_PES_OTHER; i++) {
1276                 dvbdemux->pesfilter[i] = NULL;
1277                 dvbdemux->pids[i] = 0xffff;
1278         }
1279
1280         INIT_LIST_HEAD(&dvbdemux->feed_list);
1281
1282         dvbdemux->playing = 0;
1283         dvbdemux->recording = 0;
1284         dvbdemux->tsbufp = 0;
1285
1286         if (!dvbdemux->check_crc32)
1287                 dvbdemux->check_crc32 = dvb_dmx_crc32;
1288
1289         if (!dvbdemux->memcopy)
1290                 dvbdemux->memcopy = dvb_dmx_memcopy;
1291
1292         dmx->frontend = NULL;
1293         dmx->priv = dvbdemux;
1294         dmx->open = dvbdmx_open;
1295         dmx->close = dvbdmx_close;
1296         dmx->write = dvbdmx_write;
1297         dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
1298         dmx->release_ts_feed = dvbdmx_release_ts_feed;
1299         dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
1300         dmx->release_section_feed = dvbdmx_release_section_feed;
1301
1302         dmx->add_frontend = dvbdmx_add_frontend;
1303         dmx->remove_frontend = dvbdmx_remove_frontend;
1304         dmx->get_frontends = dvbdmx_get_frontends;
1305         dmx->connect_frontend = dvbdmx_connect_frontend;
1306         dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
1307         dmx->get_pes_pids = dvbdmx_get_pes_pids;
1308
1309         mutex_init(&dvbdemux->mutex);
1310         spin_lock_init(&dvbdemux->lock);
1311
1312         return 0;
1313 }
1314
1315 EXPORT_SYMBOL(dvb_dmx_init);
1316
1317 void dvb_dmx_release(struct dvb_demux *dvbdemux)
1318 {
1319         vfree(dvbdemux->cnt_storage);
1320         vfree(dvbdemux->filter);
1321         vfree(dvbdemux->feed);
1322 }
1323
1324 EXPORT_SYMBOL(dvb_dmx_release);