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"
34 #include "dvb_functions.h"
38 ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog
40 // #define DVB_DEMUX_SECTION_LOSS_LOG
46 int dmx_register_demux(struct dmx_demux *demux)
49 list_add(&demux->reg_list, &dmx_muxs);
53 int dmx_unregister_demux(struct dmx_demux* demux)
55 struct list_head *pos, *n, *head=&dmx_muxs;
57 list_for_each_safe (pos, n, head) {
58 if (DMX_DIR_ENTRY(pos) == demux) {
70 struct list_head *dmx_get_demuxes(void)
72 if (list_empty(&dmx_muxs))
78 /******************************************************************************
79 * static inlined helper functions
80 ******************************************************************************/
83 static inline u16 section_length(const u8 *buf)
85 return 3+((buf[1]&0x0f)<<8)+buf[2];
89 static inline u16 ts_pid(const u8 *buf)
91 return ((buf[1]&0x1f)<<8)+buf[2];
95 static inline u8 payload(const u8 *tsp)
97 if (!(tsp[3]&0x10)) // no payload?
99 if (tsp[3]&0x20) { // adaptation field?
100 if (tsp[4]>183) // corrupted data?
109 void dvb_set_crc32(u8 *data, int length)
113 crc = crc32_be(~0, data, length);
115 data[length] = (crc >> 24) & 0xff;
116 data[length+1] = (crc >> 16) & 0xff;
117 data[length+2] = (crc >> 8) & 0xff;
118 data[length+3] = (crc) & 0xff;
122 static u32 dvb_dmx_crc32 (struct dvb_demux_feed *f, const u8 *src, size_t len)
124 return (f->feed.sec.crc_val = crc32_be (f->feed.sec.crc_val, src, len));
128 static void dvb_dmx_memcopy (struct dvb_demux_feed *f, u8 *d, const u8 *s, size_t len)
134 /******************************************************************************
135 * Software filter functions
136 ******************************************************************************/
138 static inline int dvb_dmx_swfilter_payload (struct dvb_demux_feed *feed, const u8 *buf)
140 int count = payload(buf);
152 ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0;
155 printk("missed packet!\n");
158 if (buf[1] & 0x40) // PUSI ?
159 feed->peslen = 0xfffa;
161 feed->peslen += count;
163 return feed->cb.ts (&buf[p], count, 0, 0, &feed->feed.ts, DMX_OK);
167 static int dvb_dmx_swfilter_sectionfilter (struct dvb_demux_feed *feed,
168 struct dvb_demux_filter *f)
173 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
174 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
176 if (f->maskandmode[i] & xor)
179 neq |= f->maskandnotmode[i] & xor;
185 return feed->cb.sec (feed->feed.sec.secbuf, feed->feed.sec.seclen,
186 0, 0, &f->filter, DMX_OK);
190 static inline int dvb_dmx_swfilter_section_feed (struct dvb_demux_feed *feed)
192 struct dvb_demux *demux = feed->demux;
193 struct dvb_demux_filter *f = feed->filter;
194 struct dmx_section_feed *sec = &feed->feed.sec;
195 int section_syntax_indicator;
197 if (!sec->is_filtering)
203 if (sec->check_crc) {
204 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
205 if (section_syntax_indicator &&
206 demux->check_crc32(feed, sec->secbuf, sec->seclen))
211 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
213 } while ((f = f->next) && sec->is_filtering);
221 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
223 struct dmx_section_feed *sec = &feed->feed.sec;
225 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
226 if(sec->secbufp < sec->tsfeedp)
228 int i, n = sec->tsfeedp - sec->secbufp;
230 /* section padding is done with 0xff bytes entirely.
231 ** due to speed reasons, we won't check all of them
232 ** but just first and last
234 if(sec->secbuf[0] != 0xff || sec->secbuf[n-1] != 0xff)
236 printk("dvb_demux.c section ts padding loss: %d/%d\n",
238 printk("dvb_demux.c pad data:");
239 for(i = 0; i < n; i++)
240 printk(" %02x", sec->secbuf[i]);
246 sec->tsfeedp = sec->secbufp = sec->seclen = 0;
247 sec->secbuf = sec->secbuf_base;
251 ** Losless Section Demux 1.4 by Emard
253 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed, const u8 *buf, u8 len)
255 struct dvb_demux *demux = feed->demux;
256 struct dmx_section_feed *sec = &feed->feed.sec;
257 u16 limit, seclen, n;
259 if(sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
262 if(sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE)
264 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
265 printk("dvb_demux.c section buffer full loss: %d/%d\n",
266 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE, DMX_MAX_SECFEED_SIZE);
268 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
274 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
277 /* -----------------------------------------------------
278 ** Dump all the sections we can find in the data (Emard)
281 limit = sec->tsfeedp;
282 if(limit > DMX_MAX_SECFEED_SIZE)
283 return -1; /* internal error should never happen */
285 /* to be sure always set secbuf */
286 sec->secbuf = sec->secbuf_base + sec->secbufp;
288 for(n = 0; sec->secbufp + 2 < limit; n++)
290 seclen = section_length(sec->secbuf);
291 if(seclen <= 0 || seclen > DMX_MAX_SECFEED_SIZE
292 || seclen + sec->secbufp > limit)
294 sec->seclen = seclen;
296 /* dump [secbuf .. secbuf+seclen) */
297 dvb_dmx_swfilter_section_feed(feed);
298 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
299 sec->secbuf += seclen; /* redundand but saves pointer arithmetic */
306 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed, const u8 *buf)
312 count = payload(buf);
314 if (count == 0) /* count == 0 if no payload or out of range */
317 p = 188-count; /* payload start */
320 ccok = ((feed->cc+1) & 0x0f) == cc ? 1 : 0;
324 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
325 printk("dvb_demux.c discontinuity detected %d bytes lost\n", count);
326 /* those bytes under sume circumstances will again be reported
327 ** in the following dvb_dmx_swfilter_section_new
330 dvb_dmx_swfilter_section_new(feed);
336 // PUSI=1 (is set), section boundary is here
337 if(count > 1 && buf[p] < count)
339 const u8 *before = buf+p+1;
340 u8 before_len = buf[p];
341 const u8 *after = before+before_len;
342 u8 after_len = count-1-before_len;
344 dvb_dmx_swfilter_section_copy_dump(feed, before, before_len);
345 dvb_dmx_swfilter_section_new(feed);
346 dvb_dmx_swfilter_section_copy_dump(feed, after, after_len);
348 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
351 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
356 // PUSI=0 (is not set), no section boundary
357 const u8 *entire = buf+p;
358 u8 entire_len = count;
360 dvb_dmx_swfilter_section_copy_dump(feed, entire, entire_len);
366 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed, const u8 *buf)
370 if (!feed->feed.ts.is_filtering)
372 if (feed->ts_type & TS_PACKET) {
373 if (feed->ts_type & TS_PAYLOAD_ONLY)
374 dvb_dmx_swfilter_payload(feed, buf);
376 feed->cb.ts(buf, 188, 0, 0, &feed->feed.ts, DMX_OK);
378 if (feed->ts_type & TS_DECODER)
379 if (feed->demux->write_to_decoder)
380 feed->demux->write_to_decoder(feed, buf, 188);
384 if (!feed->feed.sec.is_filtering)
386 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
387 feed->feed.sec.seclen = feed->feed.sec.secbufp=0;
395 #define DVR_FEED(f) \
396 (((f)->type == DMX_TYPE_TS) && \
397 ((f)->feed.ts.is_filtering) && \
398 (((f)->ts_type & (TS_PACKET|TS_PAYLOAD_ONLY)) == TS_PACKET))
400 void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
402 struct dvb_demux_feed *feed;
403 struct list_head *pos, *head=&demux->feed_list;
404 u16 pid = ts_pid(buf);
407 list_for_each(pos, head) {
408 feed = list_entry(pos, struct dvb_demux_feed, list_head);
410 if ((feed->pid != pid) && (feed->pid != 0x2000))
413 /* copy each packet only once to the dvr device, even
414 * if a PID is in multiple filters (e.g. video + PCR) */
415 if ((DVR_FEED(feed)) && (dvr_done++))
418 if (feed->pid == pid) {
419 dvb_dmx_swfilter_packet_type (feed, buf);
424 if (feed->pid == 0x2000)
425 feed->cb.ts(buf, 188, 0, 0, &feed->feed.ts, DMX_OK);
430 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf, size_t count)
432 spin_lock(&demux->lock);
436 dvb_dmx_swfilter_packet(demux, buf);
441 spin_unlock(&demux->lock);
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);
483 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
487 spin_lock(&demux->lock);
489 if ((i = demux->tsbufp)) {
490 if (count < (j=204-i)) {
491 memcpy(&demux->tsbuf[i], buf, count);
492 demux->tsbufp += count;
495 memcpy(&demux->tsbuf[i], buf, j);
496 if ((demux->tsbuf[0] == 0x47)|(demux->tsbuf[0]==0xB8)) {
497 memcpy(tmppack, demux->tsbuf, 188);
498 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
499 dvb_dmx_swfilter_packet(demux, tmppack);
506 if ((buf[p] == 0x47)|(buf[p] == 0xB8)) {
507 if (count-p >= 204) {
508 memcpy(tmppack, buf+p, 188);
509 if (tmppack[0] == 0xB8) tmppack[0] = 0x47;
510 dvb_dmx_swfilter_packet(demux, tmppack);
514 memcpy(demux->tsbuf, buf+p, i);
524 spin_unlock(&demux->lock);
528 static struct dvb_demux_filter * dvb_dmx_filter_alloc(struct dvb_demux *demux)
532 for (i=0; i<demux->filternum; i++)
533 if (demux->filter[i].state == DMX_STATE_FREE)
536 if (i == demux->filternum)
539 demux->filter[i].state = DMX_STATE_ALLOCATED;
541 return &demux->filter[i];
544 static struct dvb_demux_feed * dvb_dmx_feed_alloc(struct dvb_demux *demux)
548 for (i=0; i<demux->feednum; i++)
549 if (demux->feed[i].state == DMX_STATE_FREE)
552 if (i == demux->feednum)
555 demux->feed[i].state = DMX_STATE_ALLOCATED;
557 return &demux->feed[i];
560 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
562 struct dvb_demux_feed *entry;
564 list_for_each_entry(entry, &feed->demux->feed_list, list_head)
571 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
573 if (dvb_demux_feed_find(feed)) {
574 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
575 __FUNCTION__, feed->type, feed->state, feed->pid);
579 list_add(&feed->list_head, &feed->demux->feed_list);
582 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
584 if (!(dvb_demux_feed_find(feed))) {
585 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
586 __FUNCTION__, feed->type, feed->state, feed->pid);
590 list_del(&feed->list_head);
593 static int dmx_ts_feed_set (struct dmx_ts_feed* ts_feed, u16 pid, int ts_type,
594 enum dmx_ts_pes pes_type, size_t callback_length,
595 size_t circular_buffer_size, int descramble,
596 struct timespec timeout)
598 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
599 struct dvb_demux *demux = feed->demux;
601 if (pid > DMX_MAX_PID)
604 if (down_interruptible (&demux->mutex))
607 if (ts_type & TS_DECODER) {
608 if (pes_type >= DMX_TS_PES_OTHER) {
613 if (demux->pesfilter[pes_type] &&
614 demux->pesfilter[pes_type] != feed) {
619 demux->pesfilter[pes_type] = feed;
620 demux->pids[pes_type] = pid;
623 dvb_demux_feed_add(feed);
626 feed->buffer_size = circular_buffer_size;
627 feed->descramble = descramble;
628 feed->timeout = timeout;
629 feed->cb_length = callback_length;
630 feed->ts_type = ts_type;
631 feed->pes_type = pes_type;
633 if (feed->descramble) {
638 if (feed->buffer_size) {
642 feed->buffer = vmalloc(feed->buffer_size);
650 feed->state = DMX_STATE_READY;
657 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed* ts_feed)
659 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
660 struct dvb_demux *demux = feed->demux;
663 if (down_interruptible (&demux->mutex))
666 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
671 if (!demux->start_feed) {
676 if ((ret = demux->start_feed(feed)) < 0) {
681 spin_lock_irq(&demux->lock);
682 ts_feed->is_filtering = 1;
683 feed->state = DMX_STATE_GO;
684 spin_unlock_irq(&demux->lock);
690 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed* ts_feed)
692 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
693 struct dvb_demux *demux = feed->demux;
696 if (down_interruptible (&demux->mutex))
699 if (feed->state<DMX_STATE_GO) {
704 if (!demux->stop_feed) {
709 ret = demux->stop_feed(feed);
711 spin_lock_irq(&demux->lock);
712 ts_feed->is_filtering = 0;
713 feed->state = DMX_STATE_ALLOCATED;
714 spin_unlock_irq(&demux->lock);
720 static int dvbdmx_allocate_ts_feed (struct dmx_demux *dmx, struct dmx_ts_feed **ts_feed,
723 struct dvb_demux *demux = (struct dvb_demux *) dmx;
724 struct dvb_demux_feed *feed;
726 if (down_interruptible (&demux->mutex))
729 if (!(feed = dvb_dmx_feed_alloc(demux))) {
734 feed->type = DMX_TYPE_TS;
735 feed->cb.ts = callback;
738 feed->peslen = 0xfffa;
741 (*ts_feed) = &feed->feed.ts;
742 (*ts_feed)->parent = dmx;
743 (*ts_feed)->priv = 0;
744 (*ts_feed)->is_filtering = 0;
745 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
746 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
747 (*ts_feed)->set = dmx_ts_feed_set;
750 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
751 feed->state = DMX_STATE_FREE;
756 feed->filter->type = DMX_TYPE_TS;
757 feed->filter->feed = feed;
758 feed->filter->state = DMX_STATE_READY;
765 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx, struct dmx_ts_feed *ts_feed)
767 struct dvb_demux *demux = (struct dvb_demux *) dmx;
768 struct dvb_demux_feed *feed = (struct dvb_demux_feed *) ts_feed;
770 if (down_interruptible (&demux->mutex))
773 if (feed->state == DMX_STATE_FREE) {
785 feed->state = DMX_STATE_FREE;
786 feed->filter->state = DMX_STATE_FREE;
788 dvb_demux_feed_del(feed);
792 if (feed->ts_type & TS_DECODER)
793 demux->pesfilter[feed->pes_type] = NULL;
800 /******************************************************************************
801 * dmx_section_feed API calls
802 ******************************************************************************/
804 static int dmx_section_feed_allocate_filter(struct dmx_section_feed* feed,
805 struct dmx_section_filter** filter)
807 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
808 struct dvb_demux *dvbdemux=dvbdmxfeed->demux;
809 struct dvb_demux_filter *dvbdmxfilter;
811 if (down_interruptible (&dvbdemux->mutex))
814 dvbdmxfilter=dvb_dmx_filter_alloc(dvbdemux);
816 up(&dvbdemux->mutex);
820 spin_lock_irq(&dvbdemux->lock);
821 *filter=&dvbdmxfilter->filter;
822 (*filter)->parent=feed;
824 dvbdmxfilter->feed=dvbdmxfeed;
825 dvbdmxfilter->type=DMX_TYPE_SEC;
826 dvbdmxfilter->state=DMX_STATE_READY;
828 dvbdmxfilter->next=dvbdmxfeed->filter;
829 dvbdmxfeed->filter=dvbdmxfilter;
830 spin_unlock_irq(&dvbdemux->lock);
831 up(&dvbdemux->mutex);
836 static int dmx_section_feed_set(struct dmx_section_feed* feed,
837 u16 pid, size_t circular_buffer_size,
838 int descramble, int check_crc)
840 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
841 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
846 if (down_interruptible (&dvbdmx->mutex))
849 dvb_demux_feed_add(dvbdmxfeed);
851 dvbdmxfeed->pid = pid;
852 dvbdmxfeed->buffer_size=circular_buffer_size;
853 dvbdmxfeed->descramble=descramble;
854 if (dvbdmxfeed->descramble) {
859 dvbdmxfeed->feed.sec.check_crc=check_crc;
861 dvbdmxfeed->buffer=0;
863 dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size);
864 if (!dvbdmxfeed->buffer) {
869 dvbdmxfeed->state=DMX_STATE_READY;
874 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
877 struct dvb_demux_filter *f;
878 struct dmx_section_filter *sf;
879 u8 mask, mode, doneq;
881 if (!(f=dvbdmxfeed->filter))
886 for (i=0; i<DVB_DEMUX_MASK_MAX; i++) {
887 mode=sf->filter_mode[i];
888 mask=sf->filter_mask[i];
889 f->maskandmode[i]=mask&mode;
890 doneq|=f->maskandnotmode[i]=mask&~mode;
892 f->doneq=doneq ? 1 : 0;
893 } while ((f=f->next));
897 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
899 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
900 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
903 if (down_interruptible (&dvbdmx->mutex))
906 if (feed->is_filtering) {
910 if (!dvbdmxfeed->filter) {
915 dvbdmxfeed->feed.sec.tsfeedp = 0;
916 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
917 dvbdmxfeed->feed.sec.secbufp=0;
918 dvbdmxfeed->feed.sec.seclen=0;
920 if (!dvbdmx->start_feed) {
925 prepare_secfilters(dvbdmxfeed);
927 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
932 spin_lock_irq(&dvbdmx->lock);
933 feed->is_filtering=1;
934 dvbdmxfeed->state=DMX_STATE_GO;
935 spin_unlock_irq(&dvbdmx->lock);
941 static int dmx_section_feed_stop_filtering(struct dmx_section_feed* feed)
943 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
944 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
947 if (down_interruptible (&dvbdmx->mutex))
950 if (!dvbdmx->stop_feed) {
954 ret=dvbdmx->stop_feed(dvbdmxfeed);
955 spin_lock_irq(&dvbdmx->lock);
956 dvbdmxfeed->state=DMX_STATE_READY;
957 feed->is_filtering=0;
958 spin_unlock_irq(&dvbdmx->lock);
964 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
965 struct dmx_section_filter* filter)
967 struct dvb_demux_filter *dvbdmxfilter=(struct dvb_demux_filter *) filter, *f;
968 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
969 struct dvb_demux *dvbdmx=dvbdmxfeed->demux;
971 if (down_interruptible (&dvbdmx->mutex))
974 if (dvbdmxfilter->feed!=dvbdmxfeed) {
978 if (feed->is_filtering)
979 feed->stop_filtering(feed);
981 spin_lock_irq(&dvbdmx->lock);
982 f=dvbdmxfeed->filter;
984 if (f == dvbdmxfilter) {
985 dvbdmxfeed->filter=dvbdmxfilter->next;
987 while(f->next!=dvbdmxfilter)
989 f->next=f->next->next;
991 dvbdmxfilter->state=DMX_STATE_FREE;
992 spin_unlock_irq(&dvbdmx->lock);
997 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
998 struct dmx_section_feed **feed,
999 dmx_section_cb callback)
1001 struct dvb_demux *dvbdmx=(struct dvb_demux *) demux;
1002 struct dvb_demux_feed *dvbdmxfeed;
1004 if (down_interruptible (&dvbdmx->mutex))
1005 return -ERESTARTSYS;
1007 if (!(dvbdmxfeed=dvb_dmx_feed_alloc(dvbdmx))) {
1011 dvbdmxfeed->type=DMX_TYPE_SEC;
1012 dvbdmxfeed->cb.sec=callback;
1013 dvbdmxfeed->demux=dvbdmx;
1014 dvbdmxfeed->pid=0xffff;
1015 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1016 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1017 dvbdmxfeed->feed.sec.tsfeedp = 0;
1018 dvbdmxfeed->filter=0;
1019 dvbdmxfeed->buffer=0;
1021 (*feed)=&dvbdmxfeed->feed.sec;
1022 (*feed)->is_filtering=0;
1023 (*feed)->parent=demux;
1026 (*feed)->set=dmx_section_feed_set;
1027 (*feed)->allocate_filter=dmx_section_feed_allocate_filter;
1028 (*feed)->start_filtering=dmx_section_feed_start_filtering;
1029 (*feed)->stop_filtering=dmx_section_feed_stop_filtering;
1030 (*feed)->release_filter = dmx_section_feed_release_filter;
1036 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1037 struct dmx_section_feed *feed)
1039 struct dvb_demux_feed *dvbdmxfeed=(struct dvb_demux_feed *) feed;
1040 struct dvb_demux *dvbdmx=(struct dvb_demux *) demux;
1042 if (down_interruptible (&dvbdmx->mutex))
1043 return -ERESTARTSYS;
1045 if (dvbdmxfeed->state==DMX_STATE_FREE) {
1050 if (dvbdmxfeed->buffer) {
1051 vfree(dvbdmxfeed->buffer);
1052 dvbdmxfeed->buffer=0;
1055 dvbdmxfeed->state=DMX_STATE_FREE;
1057 dvb_demux_feed_del(dvbdmxfeed);
1059 dvbdmxfeed->pid = 0xffff;
1066 /******************************************************************************
1067 * dvb_demux kernel data API calls
1068 ******************************************************************************/
1070 static int dvbdmx_open(struct dmx_demux *demux)
1072 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1074 if (dvbdemux->users>=MAX_DVB_DEMUX_USERS)
1081 static int dvbdmx_close(struct dmx_demux *demux)
1083 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1085 if (dvbdemux->users==0)
1088 //FIXME: release any unneeded resources if users==0
1093 static int dvbdmx_write(struct dmx_demux *demux, const char *buf, size_t count)
1095 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1097 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1100 if (down_interruptible (&dvbdemux->mutex))
1101 return -ERESTARTSYS;
1102 dvb_dmx_swfilter(dvbdemux, buf, count);
1103 up(&dvbdemux->mutex);
1105 if (signal_pending(current))
1111 static int dvbdmx_add_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1113 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1114 struct list_head *head = &dvbdemux->frontend_list;
1116 list_add(&(frontend->connectivity_list), head);
1122 static int dvbdmx_remove_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1124 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1125 struct list_head *pos, *n, *head=&dvbdemux->frontend_list;
1127 list_for_each_safe (pos, n, head) {
1128 if (DMX_FE_ENTRY(pos) == frontend) {
1137 static struct list_head * dvbdmx_get_frontends(struct dmx_demux *demux)
1139 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1141 if (list_empty(&dvbdemux->frontend_list))
1143 return &dvbdemux->frontend_list;
1147 int dvbdmx_connect_frontend(struct dmx_demux *demux, struct dmx_frontend *frontend)
1149 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1151 if (demux->frontend)
1154 if (down_interruptible (&dvbdemux->mutex))
1155 return -ERESTARTSYS;
1157 demux->frontend=frontend;
1158 up(&dvbdemux->mutex);
1163 int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1165 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1167 if (down_interruptible (&dvbdemux->mutex))
1168 return -ERESTARTSYS;
1170 demux->frontend=NULL;
1171 up(&dvbdemux->mutex);
1176 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 *pids)
1178 struct dvb_demux *dvbdemux=(struct dvb_demux *) demux;
1180 memcpy(pids, dvbdemux->pids, 5*sizeof(u16));
1185 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1188 struct dmx_demux *dmx = &dvbdemux->dmx;
1191 dvbdemux->filter=vmalloc(dvbdemux->filternum*sizeof(struct dvb_demux_filter));
1192 if (!dvbdemux->filter)
1195 dvbdemux->feed=vmalloc(dvbdemux->feednum*sizeof(struct dvb_demux_feed));
1196 if (!dvbdemux->feed) {
1197 vfree(dvbdemux->filter);
1200 for (i=0; i<dvbdemux->filternum; i++) {
1201 dvbdemux->filter[i].state=DMX_STATE_FREE;
1202 dvbdemux->filter[i].index=i;
1204 for (i=0; i<dvbdemux->feednum; i++)
1205 dvbdemux->feed[i].state=DMX_STATE_FREE;
1206 dvbdemux->frontend_list.next=
1207 dvbdemux->frontend_list.prev=
1208 &dvbdemux->frontend_list;
1209 for (i=0; i<DMX_TS_PES_OTHER; i++) {
1210 dvbdemux->pesfilter[i]=NULL;
1211 dvbdemux->pids[i]=0xffff;
1214 INIT_LIST_HEAD(&dvbdemux->feed_list);
1216 dvbdemux->playing = 0;
1217 dvbdemux->recording = 0;
1220 if (!dvbdemux->check_crc32)
1221 dvbdemux->check_crc32 = dvb_dmx_crc32;
1223 if (!dvbdemux->memcopy)
1224 dvbdemux->memcopy = dvb_dmx_memcopy;
1227 dmx->reg_list.prev = dmx->reg_list.next = &dmx->reg_list;
1228 dmx->priv=(void *) dvbdemux;
1229 dmx->open=dvbdmx_open;
1230 dmx->close=dvbdmx_close;
1231 dmx->write=dvbdmx_write;
1232 dmx->allocate_ts_feed=dvbdmx_allocate_ts_feed;
1233 dmx->release_ts_feed=dvbdmx_release_ts_feed;
1234 dmx->allocate_section_feed=dvbdmx_allocate_section_feed;
1235 dmx->release_section_feed=dvbdmx_release_section_feed;
1237 dmx->descramble_mac_address=NULL;
1238 dmx->descramble_section_payload=NULL;
1240 dmx->add_frontend=dvbdmx_add_frontend;
1241 dmx->remove_frontend=dvbdmx_remove_frontend;
1242 dmx->get_frontends=dvbdmx_get_frontends;
1243 dmx->connect_frontend=dvbdmx_connect_frontend;
1244 dmx->disconnect_frontend=dvbdmx_disconnect_frontend;
1245 dmx->get_pes_pids=dvbdmx_get_pes_pids;
1246 sema_init(&dvbdemux->mutex, 1);
1247 spin_lock_init(&dvbdemux->lock);
1249 if ((err = dmx_register_demux(dmx)) < 0)
1256 int dvb_dmx_release(struct dvb_demux *dvbdemux)
1258 struct dmx_demux *dmx = &dvbdemux->dmx;
1260 dmx_unregister_demux(dmx);
1261 if (dvbdemux->filter)
1262 vfree(dvbdemux->filter);
1264 vfree(dvbdemux->feed);