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/spinlock.h>
25 #include <linux/slab.h>
26 #include <linux/vmalloc.h>
27 #include <linux/module.h>
28 #include <linux/poll.h>
29 #include <linux/string.h>
30 #include <linux/crc32.h>
31 #include <asm/uaccess.h>
33 #include "dvb_demux.h"
37 ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog
39 // #define DVB_DEMUX_SECTION_LOSS_LOG
45 int dmx_register_demux(struct dmx_demux *demux)
48 list_add(&demux->reg_list, &dmx_muxs);
52 int dmx_unregister_demux(struct dmx_demux* demux)
54 struct list_head *pos, *n, *head=&dmx_muxs;
56 list_for_each_safe (pos, n, head) {
57 if (DMX_DIR_ENTRY(pos) == demux) {
69 struct list_head *dmx_get_demuxes(void)
71 if (list_empty(&dmx_muxs))
77 /******************************************************************************
78 * static inlined helper functions
79 ******************************************************************************/
82 static inline u16 section_length(const u8 *buf)
84 return 3+((buf[1]&0x0f)<<8)+buf[2];
88 static inline u16 ts_pid(const u8 *buf)
90 return ((buf[1]&0x1f)<<8)+buf[2];
94 static inline u8 payload(const u8 *tsp)
96 if (!(tsp[3]&0x10)) // no payload?
98 if (tsp[3]&0x20) { // adaptation field?
99 if (tsp[4]>183) // corrupted data?
108 void dvb_set_crc32(u8 *data, int length)
112 crc = crc32_be(~0, data, length);
114 data[length] = (crc >> 24) & 0xff;
115 data[length+1] = (crc >> 16) & 0xff;
116 data[length+2] = (crc >> 8) & 0xff;
117 data[length+3] = (crc) & 0xff;
121 static u32 dvb_dmx_crc32 (struct dvb_demux_feed *f, const u8 *src, size_t len)
123 return (f->feed.sec.crc_val = crc32_be (f->feed.sec.crc_val, src, len));
127 static void dvb_dmx_memcopy (struct dvb_demux_feed *f, u8 *d, const u8 *s, size_t len)
133 /******************************************************************************
134 * Software filter functions
135 ******************************************************************************/
137 static inline int dvb_dmx_swfilter_payload (struct dvb_demux_feed *feed, const u8 *buf)
139 int count = payload(buf);
151 ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0;
154 printk("missed packet!\n");
157 if (buf[1] & 0x40) // PUSI ?
158 feed->peslen = 0xfffa;
160 feed->peslen += count;
162 return feed->cb.ts (&buf[p], count, NULL, 0, &feed->feed.ts, DMX_OK);
166 static int dvb_dmx_swfilter_sectionfilter (struct dvb_demux_feed *feed,
167 struct dvb_demux_filter *f)
172 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
173 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
175 if (f->maskandmode[i] & xor)
178 neq |= f->maskandnotmode[i] & xor;
181 if (f->doneq && !neq)
184 return feed->cb.sec (feed->feed.sec.secbuf, feed->feed.sec.seclen,
185 NULL, 0, &f->filter, DMX_OK);
189 static inline int dvb_dmx_swfilter_section_feed (struct dvb_demux_feed *feed)
191 struct dvb_demux *demux = feed->demux;
192 struct dvb_demux_filter *f = feed->filter;
193 struct dmx_section_feed *sec = &feed->feed.sec;
194 int section_syntax_indicator;
196 if (!sec->is_filtering)
202 if (sec->check_crc) {
203 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
204 if (section_syntax_indicator &&
205 demux->check_crc32(feed, sec->secbuf, sec->seclen))
210 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
212 } while ((f = f->next) && sec->is_filtering);
220 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
222 struct dmx_section_feed *sec = &feed->feed.sec;
224 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
225 if(sec->secbufp < sec->tsfeedp)
227 int i, n = sec->tsfeedp - sec->secbufp;
229 /* section padding is done with 0xff bytes entirely.
230 ** due to speed reasons, we won't check all of them
231 ** but just first and last
233 if(sec->secbuf[0] != 0xff || sec->secbuf[n-1] != 0xff)
235 printk("dvb_demux.c section ts padding loss: %d/%d\n",
237 printk("dvb_demux.c pad data:");
238 for(i = 0; i < n; i++)
239 printk(" %02x", sec->secbuf[i]);
245 sec->tsfeedp = sec->secbufp = sec->seclen = 0;
246 sec->secbuf = sec->secbuf_base;
250 ** Losless Section Demux 1.4 by Emard
252 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, const u8 *buf, u8 len)
254 struct dvb_demux *demux = feed->demux;
255 struct dmx_section_feed *sec = &feed->feed.sec;
256 u16 limit, seclen, n;
258 if(sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
261 if(sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE)
263 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
264 printk("dvb_demux.c section buffer full loss: %d/%d\n",
265 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, DMX_MAX_SECFEED_SIZE);
267 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
273 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
276 /* -----------------------------------------------------
277 ** Dump all the sections we can find in the data (Emard)
280 limit = sec->tsfeedp;
281 if(limit > DMX_MAX_SECFEED_SIZE)
282 return -1; /* internal error should never happen */
284 /* to be sure always set secbuf */
285 sec->secbuf = sec->secbuf_base + sec->secbufp;
287 for(n = 0; sec->secbufp + 2 < limit; n++)
289 seclen = section_length(sec->secbuf);
290 if(seclen <= 0 || seclen > DMX_MAX_SECFEED_SIZE
291 || seclen + sec->secbufp > limit)
293 sec->seclen = seclen;
295 /* dump [secbuf .. secbuf+seclen) */
296 dvb_dmx_swfilter_section_feed(feed);
297 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
298 sec->secbuf += seclen; /* redundand but saves pointer arithmetic */
305 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, const u8 *buf)
311 count = payload(buf);
313 if (count == 0) /* count == 0 if no payload or out of range */
316 p = 188-count; /* payload start */
319 ccok = ((feed->cc+1) & 0x0f) == cc ? 1 : 0;
323 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
324 printk("dvb_demux.c discontinuity detected %d bytes lost\n", count);
325 /* those bytes under sume circumstances will again be reported
326 ** in the following dvb_dmx_swfilter_section_new
329 dvb_dmx_swfilter_section_new(feed);
335 // PUSI=1 (is set), section boundary is here
336 if(count > 1 && buf[p] < count)
338 const u8 *before = buf+p+1;
339 u8 before_len = buf[p];
340 const u8 *after = before+before_len;
341 u8 after_len = count-1-before_len;
343 dvb_dmx_swfilter_section_copy_dump(feed, before, before_len);
344 dvb_dmx_swfilter_section_new(feed);
345 dvb_dmx_swfilter_section_copy_dump(feed, after, after_len);
347 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
350 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
355 // PUSI=0 (is not set), no section boundary
356 const u8 *entire = buf+p;
357 u8 entire_len = count;
359 dvb_dmx_swfilter_section_copy_dump(feed, entire, entire_len);
365 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, const u8 *buf)
369 if (!feed->feed.ts.is_filtering)
371 if (feed->ts_type & TS_PACKET) {
372 if (feed->ts_type & TS_PAYLOAD_ONLY)
373 dvb_dmx_swfilter_payload(feed, buf);
375 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
377 if (feed->ts_type & TS_DECODER)
378 if (feed->demux->write_to_decoder)
379 feed->demux->write_to_decoder(feed, buf, 188);
383 if (!feed->feed.sec.is_filtering)
385 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
386 feed->feed.sec.seclen = feed->feed.sec.secbufp=0;
394 #define DVR_FEED(f) \
395 (((f)->type == DMX_TYPE_TS) && \
396 ((f)->feed.ts.is_filtering) && \
397 (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET))
399 void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
401 struct dvb_demux_feed *feed;
402 struct list_head *pos, *head=&demux->feed_list;
403 u16 pid = ts_pid(buf);
406 list_for_each(pos, head) {
407 feed = list_entry(pos, struct dvb_demux_feed, list_head);
409 if ((feed->pid != pid) && (feed->pid != 0x2000))
412 /* copy each packet only once to the dvr device, even
413 * if a PID is in multiple filters (e.g. video + PCR) */
414 if ((DVR_FEED(feed)) && (dvr_done++))
417 if (feed->pid == pid) {
418 dvb_dmx_swfilter_packet_type (feed, buf);
423 if (feed->pid == 0x2000)
424 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
427 EXPORT_SYMBOL(dvb_dmx_swfilter_packet);
429 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, size_t count)
431 spin_lock(&demux->lock);
435 dvb_dmx_swfilter_packet(demux, buf);
440 spin_unlock(&demux->lock);
442 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
445 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
449 spin_lock(&demux->lock);
451 if ((i = demux->tsbufp)) {
452 if (count < (j=188-i)) {
453 memcpy(&demux->tsbuf[i], buf, count);
454 demux->tsbufp += count;
457 memcpy(&demux->tsbuf[i], buf, j);
458 if (demux->tsbuf[0] == 0x47)
459 dvb_dmx_swfilter_packet(demux, demux->tsbuf);
465 if (buf[p] == 0x47) {
466 if (count-p >= 188) {
467 dvb_dmx_swfilter_packet(demux, buf+p);
471 memcpy(demux->tsbuf, buf+p, i);
480 spin_unlock(&demux->lock);
482 EXPORT_SYMBOL(dvb_dmx_swfilter);
484 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
488 spin_lock(&demux->lock);
490 if ((i = demux->tsbufp)) {
491 if (count < (j=204-i)) {
492 memcpy(&demux->tsbuf[i], buf, count);
493 demux->tsbufp += count;
496 memcpy(&demux->tsbuf[i], buf, j);
497 if ((demux->tsbuf[0] == 0x47)|(demux->tsbuf[0]==0xB8)) {
498 memcpy(tmppack, demux->tsbuf, 188);
499 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
500 dvb_dmx_swfilter_packet(demux, tmppack);
507 if ((buf[p] == 0x47)|(buf[p] == 0xB8)) {
508 if (count-p >= 204) {
509 memcpy(tmppack, buf+p, 188);
510 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
511 dvb_dmx_swfilter_packet(demux, tmppack);
515 memcpy(demux->tsbuf, buf+p, i);
525 spin_unlock(&demux->lock);
527 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
530 static struct dvb_demux_filter * dvb_dmx_filter_alloc(struct dvb_demux *demux)
534 for (i=0; i<demux->filternum; i++)
535 if (demux->filter[i].state == DMX_STATE_FREE)
538 if (i == demux->filternum)
541 demux->filter[i].state = DMX_STATE_ALLOCATED;
543 return &demux->filter[i];
546 static struct dvb_demux_feed * dvb_dmx_feed_alloc(struct dvb_demux *demux)
550 for (i=0; i<demux->feednum; i++)
551 if (demux->feed[i].state == DMX_STATE_FREE)
554 if (i == demux->feednum)
557 demux->feed[i].state = DMX_STATE_ALLOCATED;
559 return &demux->feed[i];
562 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
564 struct dvb_demux_feed *entry;
566 list_for_each_entry(entry, &feed->demux->feed_list, list_head)
573 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
575 spin_lock_irq(&feed->demux->lock);
576 if (dvb_demux_feed_find(feed)) {
577 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
578 __FUNCTION__, feed->type, feed->state, feed->pid);
582 list_add(&feed->list_head, &feed->demux->feed_list);
584 spin_unlock_irq(&feed->demux->lock);
587 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
589 spin_lock_irq(&feed->demux->lock);
590 if (!(dvb_demux_feed_find(feed))) {
591 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
592 __FUNCTION__, feed->type, feed->state, feed->pid);
596 list_del(&feed->list_head);
598 spin_unlock_irq(&feed->demux->lock);
601 static int dmx_ts_feed_set (struct dmx_ts_feed* ts_feed, u16 pid, int ts_type,
602 enum dmx_ts_pes pes_type, size_t callback_length,
603 size_t circular_buffer_size, int descramble,
604 struct timespec timeout)
606 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
607 struct dvb_demux *demux = feed->demux;
609 if (pid > DMX_MAX_PID)
612 if (down_interruptible (&demux->mutex))
615 if (ts_type & TS_DECODER) {
616 if (pes_type >= DMX_TS_PES_OTHER) {
621 if (demux->pesfilter[pes_type] &&
622 demux->pesfilter[pes_type] != feed) {
627 demux->pesfilter[pes_type] = feed;
628 demux->pids[pes_type] = pid;
631 dvb_demux_feed_add(feed);
634 feed->buffer_size = circular_buffer_size;
635 feed->descramble = descramble;
636 feed->timeout = timeout;
637 feed->cb_length = callback_length;
638 feed->ts_type = ts_type;
639 feed->pes_type = pes_type;
641 if (feed->descramble) {
646 if (feed->buffer_size) {
650 feed->buffer = vmalloc(feed->buffer_size);
658 feed->state = DMX_STATE_READY;
665 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed* ts_feed)
667 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
668 struct dvb_demux *demux = feed->demux;
671 if (down_interruptible (&demux->mutex))
674 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
679 if (!demux->start_feed) {
684 if ((ret = demux->start_feed(feed)) < 0) {
689 spin_lock_irq(&demux->lock);
690 ts_feed->is_filtering = 1;
691 feed->state = DMX_STATE_GO;
692 spin_unlock_irq(&demux->lock);
698 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed* ts_feed)
700 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
701 struct dvb_demux *demux = feed->demux;
704 if (down_interruptible (&demux->mutex))
707 if (feed->state<DMX_STATE_GO) {
712 if (!demux->stop_feed) {
717 ret = demux->stop_feed(feed);
719 spin_lock_irq(&demux->lock);
720 ts_feed->is_filtering = 0;
721 feed->state = DMX_STATE_ALLOCATED;
722 spin_unlock_irq(&demux->lock);
728 static int dvbdmx_allocate_ts_feed (struct dmx_demux *dmx, struct dmx_ts_feed **ts_feed,
731 struct dvb_demux *demux = (struct dvb_demux *) dmx;
732 struct dvb_demux_feed *feed;
734 if (down_interruptible (&demux->mutex))
737 if (!(feed = dvb_dmx_feed_alloc(demux))) {
742 feed->type = DMX_TYPE_TS;
743 feed->cb.ts = callback;
746 feed->peslen = 0xfffa;
749 (*ts_feed) = &feed->feed.ts;
750 (*ts_feed)->parent = dmx;
751 (*ts_feed)->priv = NULL;
752 (*ts_feed)->is_filtering = 0;
753 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
754 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
755 (*ts_feed)->set = dmx_ts_feed_set;
758 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
759 feed->state = DMX_STATE_FREE;
764 feed->filter->type = DMX_TYPE_TS;
765 feed->filter->feed = feed;
766 feed->filter->state = DMX_STATE_READY;
773 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, struct dmx_ts_feed *ts_feed)
775 struct dvb_demux *demux = (struct dvb_demux *) dmx;
776 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
778 if (down_interruptible (&demux->mutex))
781 if (feed->state == DMX_STATE_FREE) {
793 feed->state = DMX_STATE_FREE;
794 feed->filter->state = DMX_STATE_FREE;
796 dvb_demux_feed_del(feed);
800 if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_TS_PES_OTHER)
801 demux->pesfilter[feed->pes_type] = NULL;
808 /******************************************************************************
809 * dmx_section_feed API calls
810 ******************************************************************************/
812 static int dmx_section_feed_allocate_filter(struct dmx_section_feed* feed,
813 struct dmx_section_filter** filter)
815 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
816 struct dvb_demux *dvbdemux=dvbdmxfeed->demux;
817 struct dvb_demux_filter *dvbdmxfilter;
819 if (down_interruptible (&dvbdemux->mutex))
822 dvbdmxfilter=dvb_dmx_filter_alloc(dvbdemux);
824 up(&dvbdemux->mutex);
828 spin_lock_irq(&dvbdemux->lock);
829 *filter=&dvbdmxfilter->filter;
830 (*filter)->parent=feed;
831 (*filter)->priv=NULL;
832 dvbdmxfilter->feed=dvbdmxfeed;
833 dvbdmxfilter->type=DMX_TYPE_SEC;
834 dvbdmxfilter->state=DMX_STATE_READY;
836 dvbdmxfilter->next=dvbdmxfeed->filter;
837 dvbdmxfeed->filter=dvbdmxfilter;
838 spin_unlock_irq(&dvbdemux->lock);
839 up(&dvbdemux->mutex);
844 static int dmx_section_feed_set(struct dmx_section_feed* feed,
845 u16 pid, size_t circular_buffer_size,
846 int descramble, int check_crc)
848 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
849 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
854 if (down_interruptible (&dvbdmx->mutex))
857 dvb_demux_feed_add(dvbdmxfeed);
859 dvbdmxfeed->pid = pid;
860 dvbdmxfeed->buffer_size=circular_buffer_size;
861 dvbdmxfeed->descramble=descramble;
862 if (dvbdmxfeed->descramble) {
867 dvbdmxfeed->feed.sec.check_crc=check_crc;
869 dvbdmxfeed->buffer=NULL;
871 dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size);
872 if (!dvbdmxfeed->buffer) {
877 dvbdmxfeed->state=DMX_STATE_READY;
882 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
885 struct dvb_demux_filter *f;
886 struct dmx_section_filter *sf;
887 u8 mask, mode, doneq;
889 if (!(f=dvbdmxfeed->filter))
894 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
895 mode=sf->filter_mode[i];
896 mask=sf->filter_mask[i];
897 f->maskandmode[i]=mask&mode;
898 doneq|=f->maskandnotmode[i]=mask&~mode;
900 f->doneq=doneq ? 1 : 0;
901 } while ((f=f->next));
905 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
907 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
908 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
911 if (down_interruptible (&dvbdmx->mutex))
914 if (feed->is_filtering) {
918 if (!dvbdmxfeed->filter) {
923 dvbdmxfeed->feed.sec.tsfeedp = 0;
924 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
925 dvbdmxfeed->feed.sec.secbufp=0;
926 dvbdmxfeed->feed.sec.seclen=0;
928 if (!dvbdmx->start_feed) {
933 prepare_secfilters(dvbdmxfeed);
935 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
940 spin_lock_irq(&dvbdmx->lock);
941 feed->is_filtering=1;
942 dvbdmxfeed->state=DMX_STATE_GO;
943 spin_unlock_irq(&dvbdmx->lock);
949 static int dmx_section_feed_stop_filtering(struct dmx_section_feed* feed)
951 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
952 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
955 if (down_interruptible (&dvbdmx->mutex))
958 if (!dvbdmx->stop_feed) {
962 ret=dvbdmx->stop_feed(dvbdmxfeed);
963 spin_lock_irq(&dvbdmx->lock);
964 dvbdmxfeed->state=DMX_STATE_READY;
965 feed->is_filtering=0;
966 spin_unlock_irq(&dvbdmx->lock);
972 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
973 struct dmx_section_filter* filter)
975 struct dvb_demux_filter *dvbdmxfilter=(struct dvb_demux_filter *) filter, *f;
976 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
977 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
979 if (down_interruptible (&dvbdmx->mutex))
982 if (dvbdmxfilter->feed!=dvbdmxfeed) {
986 if (feed->is_filtering)
987 feed->stop_filtering(feed);
989 spin_lock_irq(&dvbdmx->lock);
990 f=dvbdmxfeed->filter;
992 if (f == dvbdmxfilter) {
993 dvbdmxfeed->filter=dvbdmxfilter->next;
995 while(f->next!=dvbdmxfilter)
997 f->next=f->next->next;
999 dvbdmxfilter->state=DMX_STATE_FREE;
1000 spin_unlock_irq(&dvbdmx->lock);
1005 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
1006 struct dmx_section_feed **feed,
1007 dmx_section_cb callback)
1009 struct dvb_demux *dvbdmx=(struct dvb_demux *) demux;
1010 struct dvb_demux_feed *dvbdmxfeed;
1012 if (down_interruptible (&dvbdmx->mutex))
1013 return -ERESTARTSYS;
1015 if (!(dvbdmxfeed=dvb_dmx_feed_alloc(dvbdmx))) {
1019 dvbdmxfeed->type=DMX_TYPE_SEC;
1020 dvbdmxfeed->cb.sec=callback;
1021 dvbdmxfeed->demux=dvbdmx;
1022 dvbdmxfeed->pid=0xffff;
1023 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1024 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1025 dvbdmxfeed->feed.sec.tsfeedp = 0;
1026 dvbdmxfeed->filter=NULL;
1027 dvbdmxfeed->buffer=NULL;
1029 (*feed)=&dvbdmxfeed->feed.sec;
1030 (*feed)->is_filtering=0;
1031 (*feed)->parent=demux;
1034 (*feed)->set=dmx_section_feed_set;
1035 (*feed)->allocate_filter=dmx_section_feed_allocate_filter;
1036 (*feed)->start_filtering=dmx_section_feed_start_filtering;
1037 (*feed)->stop_filtering=dmx_section_feed_stop_filtering;
1038 (*feed)->release_filter = dmx_section_feed_release_filter;
1044 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1045 struct dmx_section_feed *feed)
1047 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
1048 struct dvb_demux *dvbdmx=(struct dvb_demux *) demux;
1050 if (down_interruptible (&dvbdmx->mutex))
1051 return -ERESTARTSYS;
1053 if (dvbdmxfeed->state==DMX_STATE_FREE) {
1058 if (dvbdmxfeed->buffer) {
1059 vfree(dvbdmxfeed->buffer);
1060 dvbdmxfeed->buffer=0;
1063 dvbdmxfeed->state=DMX_STATE_FREE;
1065 dvb_demux_feed_del(dvbdmxfeed);
1067 dvbdmxfeed->pid = 0xffff;
1074 /******************************************************************************
1075 * dvb_demux kernel data API calls
1076 ******************************************************************************/
1078 static int dvbdmx_open(struct dmx_demux *demux)
1080 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1082 if (dvbdemux->users>=MAX_DVB_DEMUX_USERS)
1089 static int dvbdmx_close(struct dmx_demux *demux)
1091 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1093 if (dvbdemux->users==0)
1096 //FIXME: release any unneeded resources if users==0
1101 static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count)
1103 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1105 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1108 if (down_interruptible (&dvbdemux->mutex))
1109 return -ERESTARTSYS;
1110 dvb_dmx_swfilter(dvbdemux, buf, count);
1111 up(&dvbdemux->mutex);
1113 if (signal_pending(current))
1119 static int dvbdmx_add_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1121 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1122 struct list_head *head = &dvbdemux->frontend_list;
1124 list_add(&(frontend->connectivity_list), head);
1130 static int dvbdmx_remove_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1132 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1133 struct list_head *pos, *n, *head=&dvbdemux->frontend_list;
1135 list_for_each_safe (pos, n, head) {
1136 if (DMX_FE_ENTRY(pos) == frontend) {
1145 static struct list_head * dvbdmx_get_frontends(struct dmx_demux *demux)
1147 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1149 if (list_empty(&dvbdemux->frontend_list))
1151 return &dvbdemux->frontend_list;
1155 int dvbdmx_connect_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1157 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1159 if (demux->frontend)
1162 if (down_interruptible (&dvbdemux->mutex))
1163 return -ERESTARTSYS;
1165 demux->frontend=frontend;
1166 up(&dvbdemux->mutex);
1169 EXPORT_SYMBOL(dvbdmx_connect_frontend);
1172 int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1174 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1176 if (down_interruptible (&dvbdemux->mutex))
1177 return -ERESTARTSYS;
1179 demux->frontend=NULL;
1180 up(&dvbdemux->mutex);
1183 EXPORT_SYMBOL(dvbdmx_disconnect_frontend);
1186 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 *pids)
1188 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1190 memcpy(pids, dvbdemux->pids, 5*sizeof(u16));
1195 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1198 struct dmx_demux *dmx = &dvbdemux->dmx;
1201 dvbdemux->filter=vmalloc(dvbdemux->filternum*sizeof(struct dvb_demux_filter));
1202 if (!dvbdemux->filter)
1205 dvbdemux->feed=vmalloc(dvbdemux->feednum*sizeof(struct dvb_demux_feed));
1206 if (!dvbdemux->feed) {
1207 vfree(dvbdemux->filter);
1210 for (i=0; i<dvbdemux->filternum; i++) {
1211 dvbdemux->filter[i].state=DMX_STATE_FREE;
1212 dvbdemux->filter[i].index=i;
1214 for (i=0; i<dvbdemux->feednum; i++)
1215 dvbdemux->feed[i].state=DMX_STATE_FREE;
1216 dvbdemux->frontend_list.next=
1217 dvbdemux->frontend_list.prev=
1218 &dvbdemux->frontend_list;
1219 for (i=0; i<DMX_TS_PES_OTHER; i++) {
1220 dvbdemux->pesfilter[i]=NULL;
1221 dvbdemux->pids[i]=0xffff;
1224 INIT_LIST_HEAD(&dvbdemux->feed_list);
1226 dvbdemux->playing = 0;
1227 dvbdemux->recording = 0;
1230 if (!dvbdemux->check_crc32)
1231 dvbdemux->check_crc32 = dvb_dmx_crc32;
1233 if (!dvbdemux->memcopy)
1234 dvbdemux->memcopy = dvb_dmx_memcopy;
1237 dmx->reg_list.prev = dmx->reg_list.next = &dmx->reg_list;
1238 dmx->priv=(void *) dvbdemux;
1239 dmx->open=dvbdmx_open;
1240 dmx->close=dvbdmx_close;
1241 dmx->write=dvbdmx_write;
1242 dmx->allocate_ts_feed=dvbdmx_allocate_ts_feed;
1243 dmx->release_ts_feed=dvbdmx_release_ts_feed;
1244 dmx->allocate_section_feed=dvbdmx_allocate_section_feed;
1245 dmx->release_section_feed=dvbdmx_release_section_feed;
1247 dmx->descramble_mac_address=NULL;
1248 dmx->descramble_section_payload=NULL;
1250 dmx->add_frontend=dvbdmx_add_frontend;
1251 dmx->remove_frontend=dvbdmx_remove_frontend;
1252 dmx->get_frontends=dvbdmx_get_frontends;
1253 dmx->connect_frontend=dvbdmx_connect_frontend;
1254 dmx->disconnect_frontend=dvbdmx_disconnect_frontend;
1255 dmx->get_pes_pids=dvbdmx_get_pes_pids;
1256 sema_init(&dvbdemux->mutex, 1);
1257 spin_lock_init(&dvbdemux->lock);
1259 if ((err = dmx_register_demux(dmx)) < 0)
1264 EXPORT_SYMBOL(dvb_dmx_init);
1267 int dvb_dmx_release(struct dvb_demux *dvbdemux)
1269 struct dmx_demux *dmx = &dvbdemux->dmx;
1271 dmx_unregister_demux(dmx);
1272 if (dvbdemux->filter)
1273 vfree(dvbdemux->filter);
1275 vfree(dvbdemux->feed);
1278 EXPORT_SYMBOL(dvb_dmx_release);