2 * dvb_demux.c - DVB kernel demux API
4 * Copyright (C) 2000-2001 Ralph Metzler <ralph@convergence.de>
5 * & Marcus Metzler <marcus@convergence.de>
6 * for convergence integrated media GmbH
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.
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.
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.
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>
35 #include "dvb_demux.h"
39 ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog
41 // #define DVB_DEMUX_SECTION_LOSS_LOG
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");
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");
53 #define dprintk_tscheck(x...) do { \
54 if (dvb_demux_tscheck && printk_ratelimit()) \
58 /******************************************************************************
59 * static inlined helper functions
60 ******************************************************************************/
62 static inline u16 section_length(const u8 *buf)
64 return 3 + ((buf[1] & 0x0f) << 8) + buf[2];
67 static inline u16 ts_pid(const u8 *buf)
69 return ((buf[1] & 0x1f) << 8) + buf[2];
72 static inline u8 payload(const u8 *tsp)
74 if (!(tsp[3] & 0x10)) // no payload?
77 if (tsp[3] & 0x20) { // adaptation field?
78 if (tsp[4] > 183) // corrupted data?
81 return 184 - 1 - tsp[4];
87 static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len)
89 return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len));
92 static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s,
98 /******************************************************************************
99 * Software filter functions
100 ******************************************************************************/
102 static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed,
105 int count = payload(buf);
117 ccok = ((feed->cc + 1) & 0x0f) == cc;
120 printk("missed packet!\n");
123 if (buf[1] & 0x40) // PUSI ?
124 feed->peslen = 0xfffa;
126 feed->peslen += count;
128 return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK);
131 static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed,
132 struct dvb_demux_filter *f)
137 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
138 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
140 if (f->maskandmode[i] & xor)
143 neq |= f->maskandnotmode[i] & xor;
146 if (f->doneq && !neq)
149 return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen,
150 NULL, 0, &f->filter, DMX_OK);
153 static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed)
155 struct dvb_demux *demux = feed->demux;
156 struct dvb_demux_filter *f = feed->filter;
157 struct dmx_section_feed *sec = &feed->feed.sec;
158 int section_syntax_indicator;
160 if (!sec->is_filtering)
166 if (sec->check_crc) {
167 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
168 if (section_syntax_indicator &&
169 demux->check_crc32(feed, sec->secbuf, sec->seclen))
174 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
176 } while ((f = f->next) && sec->is_filtering);
183 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
185 struct dmx_section_feed *sec = &feed->feed.sec;
187 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
188 if (sec->secbufp < sec->tsfeedp) {
189 int i, n = sec->tsfeedp - sec->secbufp;
192 * Section padding is done with 0xff bytes entirely.
193 * Due to speed reasons, we won't check all of them
194 * but just first and last.
196 if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) {
197 printk("dvb_demux.c section ts padding loss: %d/%d\n",
199 printk("dvb_demux.c pad data:");
200 for (i = 0; i < n; i++)
201 printk(" %02x", sec->secbuf[i]);
207 sec->tsfeedp = sec->secbufp = sec->seclen = 0;
208 sec->secbuf = sec->secbuf_base;
212 * Losless Section Demux 1.4.1 by Emard
214 * - middle of section A (no PUSI)
215 * - end of section A and start of section B
216 * (with PUSI pointing to the start of the second section)
218 * In this case, without feed->pusi_seen you'll receive a garbage section
219 * consisting of the end of section A. Basically because tsfeedp
220 * is incemented and the use=0 condition is not raised
221 * when the second packet arrives.
224 * when demux is started, let feed->pusi_seen = 0 to
225 * prevent initial feeding of garbage from the end of
226 * previous section. When you for the first time see PUSI=1
227 * then set feed->pusi_seen = 1
229 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed,
230 const u8 *buf, u8 len)
232 struct dvb_demux *demux = feed->demux;
233 struct dmx_section_feed *sec = &feed->feed.sec;
234 u16 limit, seclen, n;
236 if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
239 if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) {
240 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
241 printk("dvb_demux.c section buffer full loss: %d/%d\n",
242 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE,
243 DMX_MAX_SECFEED_SIZE);
245 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
251 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
255 * Dump all the sections we can find in the data (Emard)
257 limit = sec->tsfeedp;
258 if (limit > DMX_MAX_SECFEED_SIZE)
259 return -1; /* internal error should never happen */
261 /* to be sure always set secbuf */
262 sec->secbuf = sec->secbuf_base + sec->secbufp;
264 for (n = 0; sec->secbufp + 2 < limit; n++) {
265 seclen = section_length(sec->secbuf);
266 if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE
267 || seclen + sec->secbufp > limit)
269 sec->seclen = seclen;
271 /* dump [secbuf .. secbuf+seclen) */
273 dvb_dmx_swfilter_section_feed(feed);
274 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
276 printk("dvb_demux.c pusi not seen, discarding section data\n");
278 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
279 sec->secbuf += seclen; /* redundant but saves pointer arithmetic */
285 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
292 count = payload(buf);
294 if (count == 0) /* count == 0 if no payload or out of range */
297 p = 188 - count; /* payload start */
300 ccok = ((feed->cc + 1) & 0x0f) == cc;
304 /* adaption field present, check for discontinuity_indicator */
305 if ((buf[4] > 0) && (buf[5] & 0x80))
310 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
311 printk("dvb_demux.c discontinuity detected %d bytes lost\n",
314 * those bytes under sume circumstances will again be reported
315 * in the following dvb_dmx_swfilter_section_new
319 * Discontinuity detected. Reset pusi_seen = 0 to
320 * stop feeding of suspicious data until next PUSI=1 arrives
323 dvb_dmx_swfilter_section_new(feed);
327 /* PUSI=1 (is set), section boundary is here */
328 if (count > 1 && buf[p] < count) {
329 const u8 *before = &buf[p + 1];
330 u8 before_len = buf[p];
331 const u8 *after = &before[before_len];
332 u8 after_len = count - 1 - before_len;
334 dvb_dmx_swfilter_section_copy_dump(feed, before,
336 /* before start of new section, set pusi_seen = 1 */
338 dvb_dmx_swfilter_section_new(feed);
339 dvb_dmx_swfilter_section_copy_dump(feed, after,
342 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
344 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
347 /* PUSI=0 (is not set), no section boundary */
348 dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count);
354 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed,
357 switch (feed->type) {
359 if (!feed->feed.ts.is_filtering)
361 if (feed->ts_type & TS_PACKET) {
362 if (feed->ts_type & TS_PAYLOAD_ONLY)
363 dvb_dmx_swfilter_payload(feed, buf);
365 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts,
368 if (feed->ts_type & TS_DECODER)
369 if (feed->demux->write_to_decoder)
370 feed->demux->write_to_decoder(feed, buf, 188);
374 if (!feed->feed.sec.is_filtering)
376 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
377 feed->feed.sec.seclen = feed->feed.sec.secbufp = 0;
385 #define DVR_FEED(f) \
386 (((f)->type == DMX_TYPE_TS) && \
387 ((f)->feed.ts.is_filtering) && \
388 (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET))
390 static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
392 struct dvb_demux_feed *feed;
393 u16 pid = ts_pid(buf);
396 if (dvb_demux_speedcheck) {
397 struct timespec cur_time, delta_time;
398 u64 speed_bytes, speed_timedelta;
400 demux->speed_pkts_cnt++;
402 /* show speed every SPEED_PKTS_INTERVAL packets */
403 if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) {
404 cur_time = current_kernel_time();
406 if (demux->speed_last_time.tv_sec != 0 &&
407 demux->speed_last_time.tv_nsec != 0) {
408 delta_time = timespec_sub(cur_time,
409 demux->speed_last_time);
410 speed_bytes = (u64)demux->speed_pkts_cnt
412 /* convert to 1024 basis */
413 speed_bytes = 1000 * div64_u64(speed_bytes,
416 (u64)timespec_to_ns(&delta_time);
417 speed_timedelta = div64_u64(speed_timedelta,
418 1000000); /* nsec -> usec */
419 printk(KERN_INFO "TS speed %llu Kbits/sec \n",
420 div64_u64(speed_bytes,
424 demux->speed_last_time = cur_time;
425 demux->speed_pkts_cnt = 0;
429 if (demux->cnt_storage && dvb_demux_tscheck) {
430 /* check pkt counter */
433 dprintk_tscheck("TEI detected. "
434 "PID=0x%x data1=0x%x\n",
437 if ((buf[3] & 0xf) != demux->cnt_storage[pid])
438 dprintk_tscheck("TS packet counter mismatch. "
439 "PID=0x%x expected 0x%x "
441 pid, demux->cnt_storage[pid],
444 demux->cnt_storage[pid] = ((buf[3] & 0xf) + 1)&0xf;
449 list_for_each_entry(feed, &demux->feed_list, list_head) {
450 if ((feed->pid != pid) && (feed->pid != 0x2000))
453 /* copy each packet only once to the dvr device, even
454 * if a PID is in multiple filters (e.g. video + PCR) */
455 if ((DVR_FEED(feed)) && (dvr_done++))
458 if (feed->pid == pid)
459 dvb_dmx_swfilter_packet_type(feed, buf);
460 else if (feed->pid == 0x2000)
461 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
465 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
468 spin_lock(&demux->lock);
472 dvb_dmx_swfilter_packet(demux, buf);
476 spin_unlock(&demux->lock);
479 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
481 static inline int find_next_packet(const u8 *buf, int pos, size_t count,
484 int start = pos, lost;
486 while (pos < count) {
487 if (buf[pos] == 0x47 ||
488 (pktsize == 204 && buf[pos] == 0xB8))
495 /* This garbage is part of a valid packet? */
496 int backtrack = pos - pktsize;
497 if (backtrack >= 0 && (buf[backtrack] == 0x47 ||
498 (pktsize == 204 && buf[backtrack] == 0xB8)))
505 /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */
506 static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
507 size_t count, const int pktsize)
512 spin_lock(&demux->lock);
514 if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
518 memcpy(&demux->tsbuf[i], buf, count);
519 demux->tsbufp += count;
522 memcpy(&demux->tsbuf[i], buf, j);
523 if (demux->tsbuf[0] == 0x47) /* double check */
524 dvb_dmx_swfilter_packet(demux, demux->tsbuf);
530 p = find_next_packet(buf, p, count, pktsize);
533 if (count - p < pktsize)
538 if (pktsize == 204 && (*q == 0xB8)) {
539 memcpy(demux->tsbuf, q, 188);
540 demux->tsbuf[0] = 0x47;
543 dvb_dmx_swfilter_packet(demux, q);
549 memcpy(demux->tsbuf, &buf[p], i);
551 if (pktsize == 204 && demux->tsbuf[0] == 0xB8)
552 demux->tsbuf[0] = 0x47;
556 spin_unlock(&demux->lock);
559 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
561 _dvb_dmx_swfilter(demux, buf, count, 188);
563 EXPORT_SYMBOL(dvb_dmx_swfilter);
565 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
567 _dvb_dmx_swfilter(demux, buf, count, 204);
569 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
571 static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux)
575 for (i = 0; i < demux->filternum; i++)
576 if (demux->filter[i].state == DMX_STATE_FREE)
579 if (i == demux->filternum)
582 demux->filter[i].state = DMX_STATE_ALLOCATED;
584 return &demux->filter[i];
587 static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux)
591 for (i = 0; i < demux->feednum; i++)
592 if (demux->feed[i].state == DMX_STATE_FREE)
595 if (i == demux->feednum)
598 demux->feed[i].state = DMX_STATE_ALLOCATED;
600 return &demux->feed[i];
603 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
605 struct dvb_demux_feed *entry;
607 list_for_each_entry(entry, &feed->demux->feed_list, list_head)
614 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
616 spin_lock_irq(&feed->demux->lock);
617 if (dvb_demux_feed_find(feed)) {
618 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
619 __func__, feed->type, feed->state, feed->pid);
623 list_add(&feed->list_head, &feed->demux->feed_list);
625 spin_unlock_irq(&feed->demux->lock);
628 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
630 spin_lock_irq(&feed->demux->lock);
631 if (!(dvb_demux_feed_find(feed))) {
632 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
633 __func__, feed->type, feed->state, feed->pid);
637 list_del(&feed->list_head);
639 spin_unlock_irq(&feed->demux->lock);
642 static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type,
643 enum dmx_ts_pes pes_type,
644 size_t circular_buffer_size, struct timespec timeout)
646 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
647 struct dvb_demux *demux = feed->demux;
649 if (pid > DMX_MAX_PID)
652 if (mutex_lock_interruptible(&demux->mutex))
655 if (ts_type & TS_DECODER) {
656 if (pes_type >= DMX_TS_PES_OTHER) {
657 mutex_unlock(&demux->mutex);
661 if (demux->pesfilter[pes_type] &&
662 demux->pesfilter[pes_type] != feed) {
663 mutex_unlock(&demux->mutex);
667 demux->pesfilter[pes_type] = feed;
668 demux->pids[pes_type] = pid;
671 dvb_demux_feed_add(feed);
674 feed->buffer_size = circular_buffer_size;
675 feed->timeout = timeout;
676 feed->ts_type = ts_type;
677 feed->pes_type = pes_type;
679 if (feed->buffer_size) {
683 feed->buffer = vmalloc(feed->buffer_size);
685 mutex_unlock(&demux->mutex);
691 feed->state = DMX_STATE_READY;
692 mutex_unlock(&demux->mutex);
697 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed)
699 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
700 struct dvb_demux *demux = feed->demux;
703 if (mutex_lock_interruptible(&demux->mutex))
706 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
707 mutex_unlock(&demux->mutex);
711 if (!demux->start_feed) {
712 mutex_unlock(&demux->mutex);
716 if ((ret = demux->start_feed(feed)) < 0) {
717 mutex_unlock(&demux->mutex);
721 spin_lock_irq(&demux->lock);
722 ts_feed->is_filtering = 1;
723 feed->state = DMX_STATE_GO;
724 spin_unlock_irq(&demux->lock);
725 mutex_unlock(&demux->mutex);
730 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed)
732 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
733 struct dvb_demux *demux = feed->demux;
736 mutex_lock(&demux->mutex);
738 if (feed->state < DMX_STATE_GO) {
739 mutex_unlock(&demux->mutex);
743 if (!demux->stop_feed) {
744 mutex_unlock(&demux->mutex);
748 ret = demux->stop_feed(feed);
750 spin_lock_irq(&demux->lock);
751 ts_feed->is_filtering = 0;
752 feed->state = DMX_STATE_ALLOCATED;
753 spin_unlock_irq(&demux->lock);
754 mutex_unlock(&demux->mutex);
759 static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx,
760 struct dmx_ts_feed **ts_feed,
763 struct dvb_demux *demux = (struct dvb_demux *)dmx;
764 struct dvb_demux_feed *feed;
766 if (mutex_lock_interruptible(&demux->mutex))
769 if (!(feed = dvb_dmx_feed_alloc(demux))) {
770 mutex_unlock(&demux->mutex);
774 feed->type = DMX_TYPE_TS;
775 feed->cb.ts = callback;
778 feed->peslen = 0xfffa;
781 (*ts_feed) = &feed->feed.ts;
782 (*ts_feed)->parent = dmx;
783 (*ts_feed)->priv = NULL;
784 (*ts_feed)->is_filtering = 0;
785 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
786 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
787 (*ts_feed)->set = dmx_ts_feed_set;
789 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
790 feed->state = DMX_STATE_FREE;
791 mutex_unlock(&demux->mutex);
795 feed->filter->type = DMX_TYPE_TS;
796 feed->filter->feed = feed;
797 feed->filter->state = DMX_STATE_READY;
799 mutex_unlock(&demux->mutex);
804 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx,
805 struct dmx_ts_feed *ts_feed)
807 struct dvb_demux *demux = (struct dvb_demux *)dmx;
808 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
810 mutex_lock(&demux->mutex);
812 if (feed->state == DMX_STATE_FREE) {
813 mutex_unlock(&demux->mutex);
821 feed->state = DMX_STATE_FREE;
822 feed->filter->state = DMX_STATE_FREE;
824 dvb_demux_feed_del(feed);
828 if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER)
829 demux->pesfilter[feed->pes_type] = NULL;
831 mutex_unlock(&demux->mutex);
835 /******************************************************************************
836 * dmx_section_feed API calls
837 ******************************************************************************/
839 static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed,
840 struct dmx_section_filter **filter)
842 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
843 struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
844 struct dvb_demux_filter *dvbdmxfilter;
846 if (mutex_lock_interruptible(&dvbdemux->mutex))
849 dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
851 mutex_unlock(&dvbdemux->mutex);
855 spin_lock_irq(&dvbdemux->lock);
856 *filter = &dvbdmxfilter->filter;
857 (*filter)->parent = feed;
858 (*filter)->priv = NULL;
859 dvbdmxfilter->feed = dvbdmxfeed;
860 dvbdmxfilter->type = DMX_TYPE_SEC;
861 dvbdmxfilter->state = DMX_STATE_READY;
862 dvbdmxfilter->next = dvbdmxfeed->filter;
863 dvbdmxfeed->filter = dvbdmxfilter;
864 spin_unlock_irq(&dvbdemux->lock);
866 mutex_unlock(&dvbdemux->mutex);
870 static int dmx_section_feed_set(struct dmx_section_feed *feed,
871 u16 pid, size_t circular_buffer_size,
874 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
875 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
880 if (mutex_lock_interruptible(&dvbdmx->mutex))
883 dvb_demux_feed_add(dvbdmxfeed);
885 dvbdmxfeed->pid = pid;
886 dvbdmxfeed->buffer_size = circular_buffer_size;
887 dvbdmxfeed->feed.sec.check_crc = check_crc;
890 dvbdmxfeed->buffer = NULL;
892 dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size);
893 if (!dvbdmxfeed->buffer) {
894 mutex_unlock(&dvbdmx->mutex);
899 dvbdmxfeed->state = DMX_STATE_READY;
900 mutex_unlock(&dvbdmx->mutex);
904 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
907 struct dvb_demux_filter *f;
908 struct dmx_section_filter *sf;
909 u8 mask, mode, doneq;
911 if (!(f = dvbdmxfeed->filter))
916 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
917 mode = sf->filter_mode[i];
918 mask = sf->filter_mask[i];
919 f->maskandmode[i] = mask & mode;
920 doneq |= f->maskandnotmode[i] = mask & ~mode;
922 f->doneq = doneq ? 1 : 0;
923 } while ((f = f->next));
926 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
928 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
929 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
932 if (mutex_lock_interruptible(&dvbdmx->mutex))
935 if (feed->is_filtering) {
936 mutex_unlock(&dvbdmx->mutex);
940 if (!dvbdmxfeed->filter) {
941 mutex_unlock(&dvbdmx->mutex);
945 dvbdmxfeed->feed.sec.tsfeedp = 0;
946 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
947 dvbdmxfeed->feed.sec.secbufp = 0;
948 dvbdmxfeed->feed.sec.seclen = 0;
950 if (!dvbdmx->start_feed) {
951 mutex_unlock(&dvbdmx->mutex);
955 prepare_secfilters(dvbdmxfeed);
957 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
958 mutex_unlock(&dvbdmx->mutex);
962 spin_lock_irq(&dvbdmx->lock);
963 feed->is_filtering = 1;
964 dvbdmxfeed->state = DMX_STATE_GO;
965 spin_unlock_irq(&dvbdmx->lock);
967 mutex_unlock(&dvbdmx->mutex);
971 static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed)
973 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
974 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
977 mutex_lock(&dvbdmx->mutex);
979 if (!dvbdmx->stop_feed) {
980 mutex_unlock(&dvbdmx->mutex);
984 ret = dvbdmx->stop_feed(dvbdmxfeed);
986 spin_lock_irq(&dvbdmx->lock);
987 dvbdmxfeed->state = DMX_STATE_READY;
988 feed->is_filtering = 0;
989 spin_unlock_irq(&dvbdmx->lock);
991 mutex_unlock(&dvbdmx->mutex);
995 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
996 struct dmx_section_filter *filter)
998 struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f;
999 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1000 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
1002 mutex_lock(&dvbdmx->mutex);
1004 if (dvbdmxfilter->feed != dvbdmxfeed) {
1005 mutex_unlock(&dvbdmx->mutex);
1009 if (feed->is_filtering)
1010 feed->stop_filtering(feed);
1012 spin_lock_irq(&dvbdmx->lock);
1013 f = dvbdmxfeed->filter;
1015 if (f == dvbdmxfilter) {
1016 dvbdmxfeed->filter = dvbdmxfilter->next;
1018 while (f->next != dvbdmxfilter)
1020 f->next = f->next->next;
1023 dvbdmxfilter->state = DMX_STATE_FREE;
1024 spin_unlock_irq(&dvbdmx->lock);
1025 mutex_unlock(&dvbdmx->mutex);
1029 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
1030 struct dmx_section_feed **feed,
1031 dmx_section_cb callback)
1033 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1034 struct dvb_demux_feed *dvbdmxfeed;
1036 if (mutex_lock_interruptible(&dvbdmx->mutex))
1037 return -ERESTARTSYS;
1039 if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
1040 mutex_unlock(&dvbdmx->mutex);
1044 dvbdmxfeed->type = DMX_TYPE_SEC;
1045 dvbdmxfeed->cb.sec = callback;
1046 dvbdmxfeed->demux = dvbdmx;
1047 dvbdmxfeed->pid = 0xffff;
1048 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1049 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1050 dvbdmxfeed->feed.sec.tsfeedp = 0;
1051 dvbdmxfeed->filter = NULL;
1052 dvbdmxfeed->buffer = NULL;
1054 (*feed) = &dvbdmxfeed->feed.sec;
1055 (*feed)->is_filtering = 0;
1056 (*feed)->parent = demux;
1057 (*feed)->priv = NULL;
1059 (*feed)->set = dmx_section_feed_set;
1060 (*feed)->allocate_filter = dmx_section_feed_allocate_filter;
1061 (*feed)->start_filtering = dmx_section_feed_start_filtering;
1062 (*feed)->stop_filtering = dmx_section_feed_stop_filtering;
1063 (*feed)->release_filter = dmx_section_feed_release_filter;
1065 mutex_unlock(&dvbdmx->mutex);
1069 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1070 struct dmx_section_feed *feed)
1072 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1073 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1075 mutex_lock(&dvbdmx->mutex);
1077 if (dvbdmxfeed->state == DMX_STATE_FREE) {
1078 mutex_unlock(&dvbdmx->mutex);
1082 vfree(dvbdmxfeed->buffer);
1083 dvbdmxfeed->buffer = NULL;
1085 dvbdmxfeed->state = DMX_STATE_FREE;
1087 dvb_demux_feed_del(dvbdmxfeed);
1089 dvbdmxfeed->pid = 0xffff;
1091 mutex_unlock(&dvbdmx->mutex);
1095 /******************************************************************************
1096 * dvb_demux kernel data API calls
1097 ******************************************************************************/
1099 static int dvbdmx_open(struct dmx_demux *demux)
1101 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1103 if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
1110 static int dvbdmx_close(struct dmx_demux *demux)
1112 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1114 if (dvbdemux->users == 0)
1118 //FIXME: release any unneeded resources if users==0
1122 static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count)
1124 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1127 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1130 p = memdup_user(buf, count);
1133 if (mutex_lock_interruptible(&dvbdemux->mutex)) {
1135 return -ERESTARTSYS;
1137 dvb_dmx_swfilter(dvbdemux, p, count);
1139 mutex_unlock(&dvbdemux->mutex);
1141 if (signal_pending(current))
1146 static int dvbdmx_add_frontend(struct dmx_demux *demux,
1147 struct dmx_frontend *frontend)
1149 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1150 struct list_head *head = &dvbdemux->frontend_list;
1152 list_add(&(frontend->connectivity_list), head);
1157 static int dvbdmx_remove_frontend(struct dmx_demux *demux,
1158 struct dmx_frontend *frontend)
1160 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1161 struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
1163 list_for_each_safe(pos, n, head) {
1164 if (DMX_FE_ENTRY(pos) == frontend) {
1173 static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux)
1175 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1177 if (list_empty(&dvbdemux->frontend_list))
1180 return &dvbdemux->frontend_list;
1183 static int dvbdmx_connect_frontend(struct dmx_demux *demux,
1184 struct dmx_frontend *frontend)
1186 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1188 if (demux->frontend)
1191 mutex_lock(&dvbdemux->mutex);
1193 demux->frontend = frontend;
1194 mutex_unlock(&dvbdemux->mutex);
1198 static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1200 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1202 mutex_lock(&dvbdemux->mutex);
1204 demux->frontend = NULL;
1205 mutex_unlock(&dvbdemux->mutex);
1209 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids)
1211 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1213 memcpy(pids, dvbdemux->pids, 5 * sizeof(u16));
1217 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1220 struct dmx_demux *dmx = &dvbdemux->dmx;
1222 dvbdemux->cnt_storage = NULL;
1223 dvbdemux->users = 0;
1224 dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter));
1226 if (!dvbdemux->filter)
1229 dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed));
1230 if (!dvbdemux->feed) {
1231 vfree(dvbdemux->filter);
1232 dvbdemux->filter = NULL;
1235 for (i = 0; i < dvbdemux->filternum; i++) {
1236 dvbdemux->filter[i].state = DMX_STATE_FREE;
1237 dvbdemux->filter[i].index = i;
1239 for (i = 0; i < dvbdemux->feednum; i++) {
1240 dvbdemux->feed[i].state = DMX_STATE_FREE;
1241 dvbdemux->feed[i].index = i;
1244 dvbdemux->cnt_storage = vmalloc(MAX_PID + 1);
1245 if (!dvbdemux->cnt_storage)
1246 printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n");
1248 INIT_LIST_HEAD(&dvbdemux->frontend_list);
1250 for (i = 0; i < DMX_TS_PES_OTHER; i++) {
1251 dvbdemux->pesfilter[i] = NULL;
1252 dvbdemux->pids[i] = 0xffff;
1255 INIT_LIST_HEAD(&dvbdemux->feed_list);
1257 dvbdemux->playing = 0;
1258 dvbdemux->recording = 0;
1259 dvbdemux->tsbufp = 0;
1261 if (!dvbdemux->check_crc32)
1262 dvbdemux->check_crc32 = dvb_dmx_crc32;
1264 if (!dvbdemux->memcopy)
1265 dvbdemux->memcopy = dvb_dmx_memcopy;
1267 dmx->frontend = NULL;
1268 dmx->priv = dvbdemux;
1269 dmx->open = dvbdmx_open;
1270 dmx->close = dvbdmx_close;
1271 dmx->write = dvbdmx_write;
1272 dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
1273 dmx->release_ts_feed = dvbdmx_release_ts_feed;
1274 dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
1275 dmx->release_section_feed = dvbdmx_release_section_feed;
1277 dmx->add_frontend = dvbdmx_add_frontend;
1278 dmx->remove_frontend = dvbdmx_remove_frontend;
1279 dmx->get_frontends = dvbdmx_get_frontends;
1280 dmx->connect_frontend = dvbdmx_connect_frontend;
1281 dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
1282 dmx->get_pes_pids = dvbdmx_get_pes_pids;
1284 mutex_init(&dvbdemux->mutex);
1285 spin_lock_init(&dvbdemux->lock);
1290 EXPORT_SYMBOL(dvb_dmx_init);
1292 void dvb_dmx_release(struct dvb_demux *dvbdemux)
1294 vfree(dvbdemux->cnt_storage);
1295 vfree(dvbdemux->filter);
1296 vfree(dvbdemux->feed);
1299 EXPORT_SYMBOL(dvb_dmx_release);