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, DMX_OK);
 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, DMX_OK);
 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                                             DMX_OK);
 372                 }
 373                 if (feed->ts_type & TS_DECODER)
 374                         if (feed->demux->write_to_decoder)
 375                                 feed->demux->write_to_decoder(feed, buf, 188);
 376                 break;
 377
 378         case DMX_TYPE_SEC:
 379                 if (!feed->feed.sec.is_filtering)
 380                         break;
 381                 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
 382                         feed->feed.sec.seclen = feed->feed.sec.secbufp = 0;
 383                 break;
 384
 385         default:
 386                 break;
 387         }
 388 }
 389
 390 #define DVR_FEED(f)                                                     \
 391         (((f)->type == DMX_TYPE_TS) &&                                  \
 392         ((f)->feed.ts.is_filtering) &&                                  \
 393         (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET))
 394
 395 static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
 396 {
 397         struct dvb_demux_feed *feed;
 398         u16 pid = ts_pid(buf);
 399         int dvr_done = 0;
 400
 401         if (dvb_demux_speedcheck) {
 402                 struct timespec cur_time, delta_time;
 403                 u64 speed_bytes, speed_timedelta;
 404
 405                 demux->speed_pkts_cnt++;
 406
 407                 /* show speed every SPEED_PKTS_INTERVAL packets */
 408                 if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) {
 409                         cur_time = current_kernel_time();
 410
 411                         if (demux->speed_last_time.tv_sec != 0 &&
 412                                         demux->speed_last_time.tv_nsec != 0) {
 413                                 delta_time = timespec_sub(cur_time,
 414                                                 demux->speed_last_time);
 415                                 speed_bytes = (u64)demux->speed_pkts_cnt
 416                                         * 188 * 8;
 417                                 /* convert to 1024 basis */
 418                                 speed_bytes = 1000 * div64_u64(speed_bytes,
 419                                                 1024);
 420                                 speed_timedelta =
 421                                         (u64)timespec_to_ns(&delta_time);
 422                                 speed_timedelta = div64_u64(speed_timedelta,
 423                                                 1000000); /* nsec -> usec */
 424                                 printk(KERN_INFO "TS speed %llu Kbits/sec \n",
 425                                                 div64_u64(speed_bytes,
 426                                                         speed_timedelta));
 427                         }
 428
 429                         demux->speed_last_time = cur_time;
 430                         demux->speed_pkts_cnt = 0;
 431                 }
 432         }
 433
 434         if (buf[1] & 0x80) {
 435                 dprintk_tscheck("TEI detected. "
 436                                 "PID=0x%x data1=0x%x\n",
 437                                 pid, buf[1]);
 438                 /* data in this packet cant be trusted - drop it unless
 439                  * module option dvb_demux_feed_err_pkts is set */
 440                 if (!dvb_demux_feed_err_pkts)
 441                         return;
 442         } else /* if TEI bit is set, pid may be wrong- skip pkt counter */
 443                 if (demux->cnt_storage && dvb_demux_tscheck) {
 444                         /* check pkt counter */
 445                         if (pid < MAX_PID) {
 446                                 if (buf[3] & 0x10)
 447                                         demux->cnt_storage[pid] =
 448                                                 (demux->cnt_storage[pid] + 1) & 0xf;
 449
 450                                 if ((buf[3] & 0xf) != demux->cnt_storage[pid]) {
 451                                         dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n",
 452                                                 pid, demux->cnt_storage[pid],
 453                                                 buf[3] & 0xf);
 454                                         demux->cnt_storage[pid] = buf[3] & 0xf;
 455                                 }
 456                         }
 457                         /* end check */
 458                 }
 459
 460         list_for_each_entry(feed, &demux->feed_list, list_head) {
 461                 if ((feed->pid != pid) && (feed->pid != 0x2000))
 462                         continue;
 463
 464                 /* copy each packet only once to the dvr device, even
 465                  * if a PID is in multiple filters (e.g. video + PCR) */
 466                 if ((DVR_FEED(feed)) && (dvr_done++))
 467                         continue;
 468
 469                 if (feed->pid == pid)
 470                         dvb_dmx_swfilter_packet_type(feed, buf);
 471                 else if (feed->pid == 0x2000)
 472                         feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
 473         }
 474 }
 475
 476 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
 477                               size_t count)
 478 {
 479         spin_lock(&demux->lock);
 480
 481         while (count--) {
 482                 if (buf[0] == 0x47)
 483                         dvb_dmx_swfilter_packet(demux, buf);
 484                 buf += 188;
 485         }
 486
 487         spin_unlock(&demux->lock);
 488 }
 489
 490 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
 491
 492 static inline int find_next_packet(const u8 *buf, int pos, size_t count,
 493                                    const int pktsize)
 494 {
 495         int start = pos, lost;
 496
 497         while (pos < count) {
 498                 if (buf[pos] == 0x47 ||
 499                     (pktsize == 204 && buf[pos] == 0xB8))
 500                         break;
 501                 pos++;
 502         }
 503
 504         lost = pos - start;
 505         if (lost) {
 506                 /* This garbage is part of a valid packet? */
 507                 int backtrack = pos - pktsize;
 508                 if (backtrack >= 0 && (buf[backtrack] == 0x47 ||
 509                     (pktsize == 204 && buf[backtrack] == 0xB8)))
 510                         return backtrack;
 511         }
 512
 513         return pos;
 514 }
 515
 516 /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */
 517 static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
 518                 size_t count, const int pktsize)
 519 {
 520         int p = 0, i, j;
 521         const u8 *q;
 522
 523         spin_lock(&demux->lock);
 524
 525         if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
 526                 i = demux->tsbufp;
 527                 j = pktsize - i;
 528                 if (count < j) {
 529                         memcpy(&demux->tsbuf[i], buf, count);
 530                         demux->tsbufp += count;
 531                         goto bailout;
 532                 }
 533                 memcpy(&demux->tsbuf[i], buf, j);
 534                 if (demux->tsbuf[0] == 0x47) /* double check */
 535                         dvb_dmx_swfilter_packet(demux, demux->tsbuf);
 536                 demux->tsbufp = 0;
 537                 p += j;
 538         }
 539
 540         while (1) {
 541                 p = find_next_packet(buf, p, count, pktsize);
 542                 if (p >= count)
 543                         break;
 544                 if (count - p < pktsize)
 545                         break;
 546
 547                 q = &buf[p];
 548
 549                 if (pktsize == 204 && (*q == 0xB8)) {
 550                         memcpy(demux->tsbuf, q, 188);
 551                         demux->tsbuf[0] = 0x47;
 552                         q = demux->tsbuf;
 553                 }
 554                 dvb_dmx_swfilter_packet(demux, q);
 555                 p += pktsize;
 556         }
 557
 558         i = count - p;
 559         if (i) {
 560                 memcpy(demux->tsbuf, &buf[p], i);
 561                 demux->tsbufp = i;
 562                 if (pktsize == 204 && demux->tsbuf[0] == 0xB8)
 563                         demux->tsbuf[0] = 0x47;
 564         }
 565
 566 bailout:
 567         spin_unlock(&demux->lock);
 568 }
 569
 570 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
 571 {
 572         _dvb_dmx_swfilter(demux, buf, count, 188);
 573 }
 574 EXPORT_SYMBOL(dvb_dmx_swfilter);
 575
 576 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
 577 {
 578         _dvb_dmx_swfilter(demux, buf, count, 204);
 579 }
 580 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
 581
 582 void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count)
 583 {
 584         spin_lock(&demux->lock);
 585
 586         demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts, DMX_OK);
 587
 588         spin_unlock(&demux->lock);
 589 }
 590 EXPORT_SYMBOL(dvb_dmx_swfilter_raw);
 591
 592 static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux)
 593 {
 594         int i;
 595
 596         for (i = 0; i < demux->filternum; i++)
 597                 if (demux->filter[i].state == DMX_STATE_FREE)
 598                         break;
 599
 600         if (i == demux->filternum)
 601                 return NULL;
 602
 603         demux->filter[i].state = DMX_STATE_ALLOCATED;
 604
 605         return &demux->filter[i];
 606 }
 607
 608 static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux)
 609 {
 610         int i;
 611
 612         for (i = 0; i < demux->feednum; i++)
 613                 if (demux->feed[i].state == DMX_STATE_FREE)
 614                         break;
 615
 616         if (i == demux->feednum)
 617                 return NULL;
 618
 619         demux->feed[i].state = DMX_STATE_ALLOCATED;
 620
 621         return &demux->feed[i];
 622 }
 623
 624 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
 625 {
 626         struct dvb_demux_feed *entry;
 627
 628         list_for_each_entry(entry, &feed->demux->feed_list, list_head)
 629                 if (entry == feed)
 630                         return 1;
 631
 632         return 0;
 633 }
 634
 635 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
 636 {
 637         spin_lock_irq(&feed->demux->lock);
 638         if (dvb_demux_feed_find(feed)) {
 639                 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
 640                        __func__, feed->type, feed->state, feed->pid);
 641                 goto out;
 642         }
 643
 644         list_add(&feed->list_head, &feed->demux->feed_list);
 645 out:
 646         spin_unlock_irq(&feed->demux->lock);
 647 }
 648
 649 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
 650 {
 651         spin_lock_irq(&feed->demux->lock);
 652         if (!(dvb_demux_feed_find(feed))) {
 653                 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
 654                        __func__, feed->type, feed->state, feed->pid);
 655                 goto out;
 656         }
 657
 658         list_del(&feed->list_head);
 659 out:
 660         spin_unlock_irq(&feed->demux->lock);
 661 }
 662
 663 static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type,
 664                            enum dmx_ts_pes pes_type,
 665                            size_t circular_buffer_size, struct timespec timeout)
 666 {
 667         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 668         struct dvb_demux *demux = feed->demux;
 669
 670         if (pid > DMX_MAX_PID)
 671                 return -EINVAL;
 672
 673         if (mutex_lock_interruptible(&demux->mutex))
 674                 return -ERESTARTSYS;
 675
 676         if (ts_type & TS_DECODER) {
 677                 if (pes_type >= DMX_PES_OTHER) {
 678                         mutex_unlock(&demux->mutex);
 679                         return -EINVAL;
 680                 }
 681
 682                 if (demux->pesfilter[pes_type] &&
 683                     demux->pesfilter[pes_type] != feed) {
 684                         mutex_unlock(&demux->mutex);
 685                         return -EINVAL;
 686                 }
 687
 688                 demux->pesfilter[pes_type] = feed;
 689                 demux->pids[pes_type] = pid;
 690         }
 691
 692         dvb_demux_feed_add(feed);
 693
 694         feed->pid = pid;
 695         feed->buffer_size = circular_buffer_size;
 696         feed->timeout = timeout;
 697         feed->ts_type = ts_type;
 698         feed->pes_type = pes_type;
 699
 700         if (feed->buffer_size) {
 701 #ifdef NOBUFS
 702                 feed->buffer = NULL;
 703 #else
 704                 feed->buffer = vmalloc(feed->buffer_size);
 705                 if (!feed->buffer) {
 706                         mutex_unlock(&demux->mutex);
 707                         return -ENOMEM;
 708                 }
 709 #endif
 710         }
 711
 712         feed->state = DMX_STATE_READY;
 713         mutex_unlock(&demux->mutex);
 714
 715         return 0;
 716 }
 717
 718 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed)
 719 {
 720         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 721         struct dvb_demux *demux = feed->demux;
 722         int ret;
 723
 724         if (mutex_lock_interruptible(&demux->mutex))
 725                 return -ERESTARTSYS;
 726
 727         if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
 728                 mutex_unlock(&demux->mutex);
 729                 return -EINVAL;
 730         }
 731
 732         if (!demux->start_feed) {
 733                 mutex_unlock(&demux->mutex);
 734                 return -ENODEV;
 735         }
 736
 737         if ((ret = demux->start_feed(feed)) < 0) {
 738                 mutex_unlock(&demux->mutex);
 739                 return ret;
 740         }
 741
 742         spin_lock_irq(&demux->lock);
 743         ts_feed->is_filtering = 1;
 744         feed->state = DMX_STATE_GO;
 745         spin_unlock_irq(&demux->lock);
 746         mutex_unlock(&demux->mutex);
 747
 748         return 0;
 749 }
 750
 751 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed)
 752 {
 753         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 754         struct dvb_demux *demux = feed->demux;
 755         int ret;
 756
 757         mutex_lock(&demux->mutex);
 758
 759         if (feed->state < DMX_STATE_GO) {
 760                 mutex_unlock(&demux->mutex);
 761                 return -EINVAL;
 762         }
 763
 764         if (!demux->stop_feed) {
 765                 mutex_unlock(&demux->mutex);
 766                 return -ENODEV;
 767         }
 768
 769         ret = demux->stop_feed(feed);
 770
 771         spin_lock_irq(&demux->lock);
 772         ts_feed->is_filtering = 0;
 773         feed->state = DMX_STATE_ALLOCATED;
 774         spin_unlock_irq(&demux->lock);
 775         mutex_unlock(&demux->mutex);
 776
 777         return ret;
 778 }
 779
 780 static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx,
 781                                    struct dmx_ts_feed **ts_feed,
 782                                    dmx_ts_cb callback)
 783 {
 784         struct dvb_demux *demux = (struct dvb_demux *)dmx;
 785         struct dvb_demux_feed *feed;
 786
 787         if (mutex_lock_interruptible(&demux->mutex))
 788                 return -ERESTARTSYS;
 789
 790         if (!(feed = dvb_dmx_feed_alloc(demux))) {
 791                 mutex_unlock(&demux->mutex);
 792                 return -EBUSY;
 793         }
 794
 795         feed->type = DMX_TYPE_TS;
 796         feed->cb.ts = callback;
 797         feed->demux = demux;
 798         feed->pid = 0xffff;
 799         feed->peslen = 0xfffa;
 800         feed->buffer = NULL;
 801
 802         (*ts_feed) = &feed->feed.ts;
 803         (*ts_feed)->parent = dmx;
 804         (*ts_feed)->priv = NULL;
 805         (*ts_feed)->is_filtering = 0;
 806         (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
 807         (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
 808         (*ts_feed)->set = dmx_ts_feed_set;
 809
 810         if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
 811                 feed->state = DMX_STATE_FREE;
 812                 mutex_unlock(&demux->mutex);
 813                 return -EBUSY;
 814         }
 815
 816         feed->filter->type = DMX_TYPE_TS;
 817         feed->filter->feed = feed;
 818         feed->filter->state = DMX_STATE_READY;
 819
 820         mutex_unlock(&demux->mutex);
 821
 822         return 0;
 823 }
 824
 825 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx,
 826                                   struct dmx_ts_feed *ts_feed)
 827 {
 828         struct dvb_demux *demux = (struct dvb_demux *)dmx;
 829         struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
 830
 831         mutex_lock(&demux->mutex);
 832
 833         if (feed->state == DMX_STATE_FREE) {
 834                 mutex_unlock(&demux->mutex);
 835                 return -EINVAL;
 836         }
 837 #ifndef NOBUFS
 838         vfree(feed->buffer);
 839         feed->buffer = NULL;
 840 #endif
 841
 842         feed->state = DMX_STATE_FREE;
 843         feed->filter->state = DMX_STATE_FREE;
 844
 845         dvb_demux_feed_del(feed);
 846
 847         feed->pid = 0xffff;
 848
 849         if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER)
 850                 demux->pesfilter[feed->pes_type] = NULL;
 851
 852         mutex_unlock(&demux->mutex);
 853         return 0;
 854 }
 855
 856 /******************************************************************************
 857  * dmx_section_feed API calls
 858  ******************************************************************************/
 859
 860 static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed,
 861                                             struct dmx_section_filter **filter)
 862 {
 863         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 864         struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
 865         struct dvb_demux_filter *dvbdmxfilter;
 866
 867         if (mutex_lock_interruptible(&dvbdemux->mutex))
 868                 return -ERESTARTSYS;
 869
 870         dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
 871         if (!dvbdmxfilter) {
 872                 mutex_unlock(&dvbdemux->mutex);
 873                 return -EBUSY;
 874         }
 875
 876         spin_lock_irq(&dvbdemux->lock);
 877         *filter = &dvbdmxfilter->filter;
 878         (*filter)->parent = feed;
 879         (*filter)->priv = NULL;
 880         dvbdmxfilter->feed = dvbdmxfeed;
 881         dvbdmxfilter->type = DMX_TYPE_SEC;
 882         dvbdmxfilter->state = DMX_STATE_READY;
 883         dvbdmxfilter->next = dvbdmxfeed->filter;
 884         dvbdmxfeed->filter = dvbdmxfilter;
 885         spin_unlock_irq(&dvbdemux->lock);
 886
 887         mutex_unlock(&dvbdemux->mutex);
 888         return 0;
 889 }
 890
 891 static int dmx_section_feed_set(struct dmx_section_feed *feed,
 892                                 u16 pid, size_t circular_buffer_size,
 893                                 int check_crc)
 894 {
 895         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 896         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 897
 898         if (pid > 0x1fff)
 899                 return -EINVAL;
 900
 901         if (mutex_lock_interruptible(&dvbdmx->mutex))
 902                 return -ERESTARTSYS;
 903
 904         dvb_demux_feed_add(dvbdmxfeed);
 905
 906         dvbdmxfeed->pid = pid;
 907         dvbdmxfeed->buffer_size = circular_buffer_size;
 908         dvbdmxfeed->feed.sec.check_crc = check_crc;
 909
 910 #ifdef NOBUFS
 911         dvbdmxfeed->buffer = NULL;
 912 #else
 913         dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size);
 914         if (!dvbdmxfeed->buffer) {
 915                 mutex_unlock(&dvbdmx->mutex);
 916                 return -ENOMEM;
 917         }
 918 #endif
 919
 920         dvbdmxfeed->state = DMX_STATE_READY;
 921         mutex_unlock(&dvbdmx->mutex);
 922         return 0;
 923 }
 924
 925 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
 926 {
 927         int i;
 928         struct dvb_demux_filter *f;
 929         struct dmx_section_filter *sf;
 930         u8 mask, mode, doneq;
 931
 932         if (!(f = dvbdmxfeed->filter))
 933                 return;
 934         do {
 935                 sf = &f->filter;
 936                 doneq = 0;
 937                 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
 938                         mode = sf->filter_mode[i];
 939                         mask = sf->filter_mask[i];
 940                         f->maskandmode[i] = mask & mode;
 941                         doneq |= f->maskandnotmode[i] = mask & ~mode;
 942                 }
 943                 f->doneq = doneq ? 1 : 0;
 944         } while ((f = f->next));
 945 }
 946
 947 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
 948 {
 949         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 950         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 951         int ret;
 952
 953         if (mutex_lock_interruptible(&dvbdmx->mutex))
 954                 return -ERESTARTSYS;
 955
 956         if (feed->is_filtering) {
 957                 mutex_unlock(&dvbdmx->mutex);
 958                 return -EBUSY;
 959         }
 960
 961         if (!dvbdmxfeed->filter) {
 962                 mutex_unlock(&dvbdmx->mutex);
 963                 return -EINVAL;
 964         }
 965
 966         dvbdmxfeed->feed.sec.tsfeedp = 0;
 967         dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
 968         dvbdmxfeed->feed.sec.secbufp = 0;
 969         dvbdmxfeed->feed.sec.seclen = 0;
 970
 971         if (!dvbdmx->start_feed) {
 972                 mutex_unlock(&dvbdmx->mutex);
 973                 return -ENODEV;
 974         }
 975
 976         prepare_secfilters(dvbdmxfeed);
 977
 978         if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
 979                 mutex_unlock(&dvbdmx->mutex);
 980                 return ret;
 981         }
 982
 983         spin_lock_irq(&dvbdmx->lock);
 984         feed->is_filtering = 1;
 985         dvbdmxfeed->state = DMX_STATE_GO;
 986         spin_unlock_irq(&dvbdmx->lock);
 987
 988         mutex_unlock(&dvbdmx->mutex);
 989         return 0;
 990 }
 991
 992 static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed)
 993 {
 994         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
 995         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 996         int ret;
 997
 998         mutex_lock(&dvbdmx->mutex);
 999
1000         if (!dvbdmx->stop_feed) {
1001                 mutex_unlock(&dvbdmx->mutex);
1002                 return -ENODEV;
1003         }
1004
1005         ret = dvbdmx->stop_feed(dvbdmxfeed);
1006
1007         spin_lock_irq(&dvbdmx->lock);
1008         dvbdmxfeed->state = DMX_STATE_READY;
1009         feed->is_filtering = 0;
1010         spin_unlock_irq(&dvbdmx->lock);
1011
1012         mutex_unlock(&dvbdmx->mutex);
1013         return ret;
1014 }
1015
1016 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
1017                                            struct dmx_section_filter *filter)
1018 {
1019         struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f;
1020         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1021         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
1022
1023         mutex_lock(&dvbdmx->mutex);
1024
1025         if (dvbdmxfilter->feed != dvbdmxfeed) {
1026                 mutex_unlock(&dvbdmx->mutex);
1027                 return -EINVAL;
1028         }
1029
1030         if (feed->is_filtering)
1031                 feed->stop_filtering(feed);
1032
1033         spin_lock_irq(&dvbdmx->lock);
1034         f = dvbdmxfeed->filter;
1035
1036         if (f == dvbdmxfilter) {
1037                 dvbdmxfeed->filter = dvbdmxfilter->next;
1038         } else {
1039                 while (f->next != dvbdmxfilter)
1040                         f = f->next;
1041                 f->next = f->next->next;
1042         }
1043
1044         dvbdmxfilter->state = DMX_STATE_FREE;
1045         spin_unlock_irq(&dvbdmx->lock);
1046         mutex_unlock(&dvbdmx->mutex);
1047         return 0;
1048 }
1049
1050 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
1051                                         struct dmx_section_feed **feed,
1052                                         dmx_section_cb callback)
1053 {
1054         struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1055         struct dvb_demux_feed *dvbdmxfeed;
1056
1057         if (mutex_lock_interruptible(&dvbdmx->mutex))
1058                 return -ERESTARTSYS;
1059
1060         if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
1061                 mutex_unlock(&dvbdmx->mutex);
1062                 return -EBUSY;
1063         }
1064
1065         dvbdmxfeed->type = DMX_TYPE_SEC;
1066         dvbdmxfeed->cb.sec = callback;
1067         dvbdmxfeed->demux = dvbdmx;
1068         dvbdmxfeed->pid = 0xffff;
1069         dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1070         dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1071         dvbdmxfeed->feed.sec.tsfeedp = 0;
1072         dvbdmxfeed->filter = NULL;
1073         dvbdmxfeed->buffer = NULL;
1074
1075         (*feed) = &dvbdmxfeed->feed.sec;
1076         (*feed)->is_filtering = 0;
1077         (*feed)->parent = demux;
1078         (*feed)->priv = NULL;
1079
1080         (*feed)->set = dmx_section_feed_set;
1081         (*feed)->allocate_filter = dmx_section_feed_allocate_filter;
1082         (*feed)->start_filtering = dmx_section_feed_start_filtering;
1083         (*feed)->stop_filtering = dmx_section_feed_stop_filtering;
1084         (*feed)->release_filter = dmx_section_feed_release_filter;
1085
1086         mutex_unlock(&dvbdmx->mutex);
1087         return 0;
1088 }
1089
1090 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1091                                        struct dmx_section_feed *feed)
1092 {
1093         struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1094         struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1095
1096         mutex_lock(&dvbdmx->mutex);
1097
1098         if (dvbdmxfeed->state == DMX_STATE_FREE) {
1099                 mutex_unlock(&dvbdmx->mutex);
1100                 return -EINVAL;
1101         }
1102 #ifndef NOBUFS
1103         vfree(dvbdmxfeed->buffer);
1104         dvbdmxfeed->buffer = NULL;
1105 #endif
1106         dvbdmxfeed->state = DMX_STATE_FREE;
1107
1108         dvb_demux_feed_del(dvbdmxfeed);
1109
1110         dvbdmxfeed->pid = 0xffff;
1111
1112         mutex_unlock(&dvbdmx->mutex);
1113         return 0;
1114 }
1115
1116 /******************************************************************************
1117  * dvb_demux kernel data API calls
1118  ******************************************************************************/
1119
1120 static int dvbdmx_open(struct dmx_demux *demux)
1121 {
1122         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1123
1124         if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
1125                 return -EUSERS;
1126
1127         dvbdemux->users++;
1128         return 0;
1129 }
1130
1131 static int dvbdmx_close(struct dmx_demux *demux)
1132 {
1133         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1134
1135         if (dvbdemux->users == 0)
1136                 return -ENODEV;
1137
1138         dvbdemux->users--;
1139         //FIXME: release any unneeded resources if users==0
1140         return 0;
1141 }
1142
1143 static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count)
1144 {
1145         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1146         void *p;
1147
1148         if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1149                 return -EINVAL;
1150
1151         p = memdup_user(buf, count);
1152         if (IS_ERR(p))
1153                 return PTR_ERR(p);
1154         if (mutex_lock_interruptible(&dvbdemux->mutex)) {
1155                 kfree(p);
1156                 return -ERESTARTSYS;
1157         }
1158         dvb_dmx_swfilter(dvbdemux, p, count);
1159         kfree(p);
1160         mutex_unlock(&dvbdemux->mutex);
1161
1162         if (signal_pending(current))
1163                 return -EINTR;
1164         return count;
1165 }
1166
1167 static int dvbdmx_add_frontend(struct dmx_demux *demux,
1168                                struct dmx_frontend *frontend)
1169 {
1170         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1171         struct list_head *head = &dvbdemux->frontend_list;
1172
1173         list_add(&(frontend->connectivity_list), head);
1174
1175         return 0;
1176 }
1177
1178 static int dvbdmx_remove_frontend(struct dmx_demux *demux,
1179                                   struct dmx_frontend *frontend)
1180 {
1181         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1182         struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
1183
1184         list_for_each_safe(pos, n, head) {
1185                 if (DMX_FE_ENTRY(pos) == frontend) {
1186                         list_del(pos);
1187                         return 0;
1188                 }
1189         }
1190
1191         return -ENODEV;
1192 }
1193
1194 static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux)
1195 {
1196         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1197
1198         if (list_empty(&dvbdemux->frontend_list))
1199                 return NULL;
1200
1201         return &dvbdemux->frontend_list;
1202 }
1203
1204 static int dvbdmx_connect_frontend(struct dmx_demux *demux,
1205                                    struct dmx_frontend *frontend)
1206 {
1207         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1208
1209         if (demux->frontend)
1210                 return -EINVAL;
1211
1212         mutex_lock(&dvbdemux->mutex);
1213
1214         demux->frontend = frontend;
1215         mutex_unlock(&dvbdemux->mutex);
1216         return 0;
1217 }
1218
1219 static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1220 {
1221         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1222
1223         mutex_lock(&dvbdemux->mutex);
1224
1225         demux->frontend = NULL;
1226         mutex_unlock(&dvbdemux->mutex);
1227         return 0;
1228 }
1229
1230 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids)
1231 {
1232         struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1233
1234         memcpy(pids, dvbdemux->pids, 5 * sizeof(u16));
1235         return 0;
1236 }
1237
1238 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1239 {
1240         int i;
1241         struct dmx_demux *dmx = &dvbdemux->dmx;
1242
1243         dvbdemux->cnt_storage = NULL;
1244         dvbdemux->users = 0;
1245         dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter));
1246
1247         if (!dvbdemux->filter)
1248                 return -ENOMEM;
1249
1250         dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed));
1251         if (!dvbdemux->feed) {
1252                 vfree(dvbdemux->filter);
1253                 dvbdemux->filter = NULL;
1254                 return -ENOMEM;
1255         }
1256         for (i = 0; i < dvbdemux->filternum; i++) {
1257                 dvbdemux->filter[i].state = DMX_STATE_FREE;
1258                 dvbdemux->filter[i].index = i;
1259         }
1260         for (i = 0; i < dvbdemux->feednum; i++) {
1261                 dvbdemux->feed[i].state = DMX_STATE_FREE;
1262                 dvbdemux->feed[i].index = i;
1263         }
1264
1265         dvbdemux->cnt_storage = vmalloc(MAX_PID + 1);
1266         if (!dvbdemux->cnt_storage)
1267                 printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n");
1268
1269         INIT_LIST_HEAD(&dvbdemux->frontend_list);
1270
1271         for (i = 0; i < DMX_PES_OTHER; i++) {
1272                 dvbdemux->pesfilter[i] = NULL;
1273                 dvbdemux->pids[i] = 0xffff;
1274         }
1275
1276         INIT_LIST_HEAD(&dvbdemux->feed_list);
1277
1278         dvbdemux->playing = 0;
1279         dvbdemux->recording = 0;
1280         dvbdemux->tsbufp = 0;
1281
1282         if (!dvbdemux->check_crc32)
1283                 dvbdemux->check_crc32 = dvb_dmx_crc32;
1284
1285         if (!dvbdemux->memcopy)
1286                 dvbdemux->memcopy = dvb_dmx_memcopy;
1287
1288         dmx->frontend = NULL;
1289         dmx->priv = dvbdemux;
1290         dmx->open = dvbdmx_open;
1291         dmx->close = dvbdmx_close;
1292         dmx->write = dvbdmx_write;
1293         dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
1294         dmx->release_ts_feed = dvbdmx_release_ts_feed;
1295         dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
1296         dmx->release_section_feed = dvbdmx_release_section_feed;
1297
1298         dmx->add_frontend = dvbdmx_add_frontend;
1299         dmx->remove_frontend = dvbdmx_remove_frontend;
1300         dmx->get_frontends = dvbdmx_get_frontends;
1301         dmx->connect_frontend = dvbdmx_connect_frontend;
1302         dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
1303         dmx->get_pes_pids = dvbdmx_get_pes_pids;
1304
1305         mutex_init(&dvbdemux->mutex);
1306         spin_lock_init(&dvbdemux->lock);
1307
1308         return 0;
1309 }
1310
1311 EXPORT_SYMBOL(dvb_dmx_init);
1312
1313 void dvb_dmx_release(struct dvb_demux *dvbdemux)
1314 {
1315         vfree(dvbdemux->cnt_storage);
1316         vfree(dvbdemux->filter);
1317         vfree(dvbdemux->feed);
1318 }
1319
1320 EXPORT_SYMBOL(dvb_dmx_release);