fix ratio calculation for slow reverse skipping
[openblackhole/openblackhole-enigma2.git] / lib / dvb / dvb.cpp
1 #include <lib/base/eerror.h>
2 #include <lib/base/filepush.h>
3 #include <lib/dvb/idvb.h>
4 #include <lib/dvb/dvb.h>
5 #include <lib/dvb/sec.h>
6
7 #include <errno.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <unistd.h>
11 #include <fcntl.h>
12 #include <sys/ioctl.h>
13
14 DEFINE_REF(eDVBRegisteredFrontend);
15 DEFINE_REF(eDVBRegisteredDemux);
16
17 DEFINE_REF(eDVBAllocatedFrontend);
18
19 eDVBAllocatedFrontend::eDVBAllocatedFrontend(eDVBRegisteredFrontend *fe): m_fe(fe)
20 {
21         m_fe->inc_use();
22 }
23
24 eDVBAllocatedFrontend::~eDVBAllocatedFrontend()
25 {
26         m_fe->dec_use();
27 }
28
29 DEFINE_REF(eDVBAllocatedDemux);
30
31 eDVBAllocatedDemux::eDVBAllocatedDemux(eDVBRegisteredDemux *demux): m_demux(demux)
32 {
33         m_demux->m_inuse++;
34 }
35
36 eDVBAllocatedDemux::~eDVBAllocatedDemux()
37 {
38         --m_demux->m_inuse;
39 }
40
41 DEFINE_REF(eDVBResourceManager);
42
43 eDVBResourceManager *eDVBResourceManager::instance;
44
45 eDVBResourceManager::eDVBResourceManager()
46         :m_releaseCachedChannelTimer(eApp)
47 {
48         avail = 1;
49         busy = 0;
50         m_sec = new eDVBSatelliteEquipmentControl(m_frontend);
51         if (!instance)
52                 instance = this;
53                 
54                 /* search available adapters... */
55
56                 // add linux devices
57         
58         int num_adapter = 0;
59         while (eDVBAdapterLinux::exist(num_adapter))
60         {
61                 addAdapter(new eDVBAdapterLinux(num_adapter));
62                 num_adapter++;
63         }
64         
65         eDebug("found %d adapter, %d frontends and %d demux", 
66                 m_adapter.size(), m_frontend.size(), m_demux.size());
67
68         CONNECT(m_releaseCachedChannelTimer.timeout, eDVBResourceManager::releaseCachedChannel);
69 }
70
71
72 DEFINE_REF(eDVBAdapterLinux);
73 eDVBAdapterLinux::eDVBAdapterLinux(int nr): m_nr(nr)
74 {
75                 // scan frontends
76         int num_fe = 0;
77         
78         eDebug("scanning for frontends..");
79         while (1)
80         {
81                 struct stat s;
82                 char filename[128];
83 #if HAVE_DVB_API_VERSION < 3
84                 sprintf(filename, "/dev/dvb/card%d/frontend%d", m_nr, num_fe);
85 #else
86                 sprintf(filename, "/dev/dvb/adapter%d/frontend%d", m_nr, num_fe);
87 #endif
88                 if (stat(filename, &s))
89                         break;
90                 ePtr<eDVBFrontend> fe;
91
92                 int ok = 0;
93                 fe = new eDVBFrontend(m_nr, num_fe, ok);
94                 if (ok)
95                         m_frontend.push_back(fe);
96                 ++num_fe;
97         }
98         
99                 // scan demux
100         int num_demux = 0;
101         while (1)
102         {
103                 struct stat s;
104                 char filename[128];
105 #if HAVE_DVB_API_VERSION < 3
106                 sprintf(filename, "/dev/dvb/card%d/demux%d", m_nr, num_demux);
107 #else
108                 sprintf(filename, "/dev/dvb/adapter%d/demux%d", m_nr, num_demux);
109 #endif
110                 if (stat(filename, &s))
111                         break;
112                 ePtr<eDVBDemux> demux;
113                 
114                 demux = new eDVBDemux(m_nr, num_demux);
115                 m_demux.push_back(demux);
116                         
117                 ++num_demux;
118         }
119 }
120
121 int eDVBAdapterLinux::getNumDemux()
122 {
123         return m_demux.size();
124 }
125
126 RESULT eDVBAdapterLinux::getDemux(ePtr<eDVBDemux> &demux, int nr)
127 {
128         eSmartPtrList<eDVBDemux>::iterator i(m_demux.begin());
129         while (nr && (i != m_demux.end()))
130         {
131                 --nr;
132                 ++i;
133         }
134         
135         if (i != m_demux.end())
136                 demux = *i;
137         else
138                 return -1;
139                 
140         return 0;
141 }
142
143 int eDVBAdapterLinux::getNumFrontends()
144 {
145         return m_frontend.size();
146 }
147
148 RESULT eDVBAdapterLinux::getFrontend(ePtr<eDVBFrontend> &fe, int nr)
149 {
150         eSmartPtrList<eDVBFrontend>::iterator i(m_frontend.begin());
151         while (nr && (i != m_frontend.end()))
152         {
153                 --nr;
154                 ++i;
155         }
156         
157         if (i != m_frontend.end())
158                 fe = *i;
159         else
160                 return -1;
161                 
162         return 0;
163 }
164
165 int eDVBAdapterLinux::exist(int nr)
166 {
167         struct stat s;
168         char filename[128];
169 #if HAVE_DVB_API_VERSION < 3
170         sprintf(filename, "/dev/dvb/card%d", nr);
171 #else
172         sprintf(filename, "/dev/dvb/adapter%d", nr);
173 #endif
174         if (!stat(filename, &s))
175                 return 1;
176         return 0;
177 }
178
179 eDVBResourceManager::~eDVBResourceManager()
180 {
181         if (instance == this)
182                 instance = 0;
183 }
184
185 void eDVBResourceManager::addAdapter(iDVBAdapter *adapter)
186 {
187         int num_fe = adapter->getNumFrontends();
188         int num_demux = adapter->getNumDemux();
189         
190         m_adapter.push_back(adapter);
191         
192         int i;
193         for (i=0; i<num_demux; ++i)
194         {
195                 ePtr<eDVBDemux> demux;
196                 if (!adapter->getDemux(demux, i))
197                         m_demux.push_back(new eDVBRegisteredDemux(demux, adapter));
198         }
199
200         for (i=0; i<num_fe; ++i)
201         {
202                 ePtr<eDVBFrontend> frontend;
203
204                 if (!adapter->getFrontend(frontend, i))
205                 {
206                         frontend->setSEC(m_sec);
207                         m_frontend.push_back(new eDVBRegisteredFrontend(frontend, adapter));
208                 }
209         }
210 }
211
212 RESULT eDVBResourceManager::allocateFrontend(ePtr<eDVBAllocatedFrontend> &fe, ePtr<iDVBFrontendParameters> &feparm)
213 {
214         ePtr<eDVBRegisteredFrontend> best;
215         int bestval = 0;
216
217         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i)
218                 if (!i->m_inuse)
219                 {
220                         int c = i->m_frontend->isCompatibleWith(feparm);
221                         if (c > bestval)
222                         {
223                                 bestval = c;
224                                 best = i;
225                         }
226                 }
227
228         if (best)
229         {
230                 fe = new eDVBAllocatedFrontend(best);
231                 return 0;
232         }
233         
234         fe = 0;
235         
236         return -1;
237 }
238
239 RESULT eDVBResourceManager::allocateFrontendByIndex(ePtr<eDVBAllocatedFrontend> &fe, int nr)
240 {
241         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i, --nr)
242                 if ((!nr) && !i->m_inuse)
243                 {
244                         fe = new eDVBAllocatedFrontend(i);
245                         return 0;
246                 }
247         
248         fe = 0;
249         return -1;
250 }
251
252 RESULT eDVBResourceManager::allocateDemux(eDVBRegisteredFrontend *fe, ePtr<eDVBAllocatedDemux> &demux, int cap)
253 {
254                 /* find first unused demux which is on same adapter as frontend (or any, if PVR)
255                    never use the first one unless we need a decoding demux. */
256
257         eDebug("allocate demux");
258         eSmartPtrList<eDVBRegisteredDemux>::iterator i(m_demux.begin());
259         
260         if (i == m_demux.end())
261                 return -1;
262                 
263         int n=0;
264                 /* FIXME: hardware demux policy */
265         if (!(cap & iDVBChannel::capDecode))
266                 ++i, ++n;
267         
268         for (; i != m_demux.end(); ++i, ++n)
269                 if ((!i->m_inuse) && ((!fe) || (i->m_adapter == fe->m_adapter)))
270                 {
271                         if ((cap & iDVBChannel::capDecode) && n)
272                                 continue;
273                         
274                         demux = new eDVBAllocatedDemux(i);
275                         if (fe)
276                                 demux->get().setSourceFrontend(fe->m_frontend->getID());
277                         else
278                                 demux->get().setSourcePVR(0);
279                         return 0;
280                 }
281         eDebug("demux not found");
282         return -1;
283 }
284
285 RESULT eDVBResourceManager::setChannelList(iDVBChannelList *list)
286 {
287         m_list = list;
288         return 0;
289 }
290
291 RESULT eDVBResourceManager::getChannelList(ePtr<iDVBChannelList> &list)
292 {
293         list = m_list;
294         if (list)
295                 return 0;
296         else
297                 return -ENOENT;
298 }
299
300 RESULT eDVBResourceManager::allocateChannel(const eDVBChannelID &channelid, eUsePtr<iDVBChannel> &channel)
301 {
302                 /* first, check if a channel is already existing. */
303
304         if (m_cached_channel)
305         {
306                 eDVBChannel *cache_chan = (eDVBChannel*)&(*m_cached_channel);
307                 if(channelid==cache_chan->getChannelID())
308                 {
309                         eDebug("use cached_channel");
310                         channel = m_cached_channel;
311                         return 0;
312                 }
313                 m_cached_channel_state_changed_conn.disconnect();
314                 m_cached_channel=0;
315                 m_releaseCachedChannelTimer.stop();
316         }
317
318 //      eDebug("allocate channel.. %04x:%04x", channelid.transport_stream_id.get(), channelid.original_network_id.get());
319         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
320         {
321 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
322                 if (i->m_channel_id == channelid)
323                 {
324 //                      eDebug("found shared channel..");
325                         channel = i->m_channel;
326                         return 0;
327                 }
328         }
329         
330         /* no currently available channel is tuned to this channelid. create a new one, if possible. */
331
332         if (!m_list)
333         {
334                 eDebug("no channel list set!");
335                 return -ENOENT;
336         }
337
338         ePtr<iDVBFrontendParameters> feparm;
339         if (m_list->getChannelFrontendData(channelid, feparm))
340         {
341                 eDebug("channel not found!");
342                 return -ENOENT;
343         }
344
345         /* allocate a frontend. */
346         
347         ePtr<eDVBAllocatedFrontend> fe;
348         
349         if (allocateFrontend(fe, feparm))
350                 return errNoFrontend;
351
352         RESULT res;
353         ePtr<eDVBChannel> ch;
354         ch = new eDVBChannel(this, fe);
355
356         res = ch->setChannel(channelid, feparm);
357         if (res)
358         {
359                 channel = 0;
360                 return errChidNotFound;
361         }
362         m_cached_channel = channel = ch;
363         m_cached_channel_state_changed_conn =
364                 CONNECT(ch->m_stateChanged,eDVBResourceManager::DVBChannelStateChanged);
365
366         return 0;
367 }
368
369 void eDVBResourceManager::DVBChannelStateChanged(iDVBChannel *chan)
370 {
371         int state=0;
372         chan->getState(state);
373         switch (state)
374         {
375                 case iDVBChannel::state_release:
376                 case iDVBChannel::state_ok:
377                 {
378                         eDebug("stop release channel timer");
379                         m_releaseCachedChannelTimer.stop();
380                         break;
381                 }
382                 case iDVBChannel::state_last_instance:
383                 {
384                         eDebug("start release channel timer");
385                         m_releaseCachedChannelTimer.start(3000, true);
386                         break;
387                 }
388                 default: // ignore all other events
389                         break;
390         }
391 }
392
393 void eDVBResourceManager::releaseCachedChannel()
394 {
395         eDebug("release cached channel (timer timeout)");
396         m_cached_channel=0;
397 }
398
399 RESULT eDVBResourceManager::allocateRawChannel(eUsePtr<iDVBChannel> &channel, int frontend_index)
400 {
401         ePtr<eDVBAllocatedFrontend> fe;
402
403         if (m_cached_channel)
404         {
405                 m_cached_channel_state_changed_conn.disconnect();
406                 m_cached_channel=0;
407                 m_releaseCachedChannelTimer.stop();
408         }
409
410         if (allocateFrontendByIndex(fe, frontend_index))
411                 return errNoFrontend;
412         
413         eDVBChannel *ch;
414         ch = new eDVBChannel(this, fe);
415
416         channel = ch;
417         return 0;
418 }
419
420
421 RESULT eDVBResourceManager::allocatePVRChannel(eUsePtr<iDVBPVRChannel> &channel)
422 {
423         ePtr<eDVBAllocatedDemux> demux;
424
425         eDVBChannel *ch;
426         ch = new eDVBChannel(this, 0);
427         
428         channel = ch;
429         return 0;
430 }
431
432 RESULT eDVBResourceManager::addChannel(const eDVBChannelID &chid, eDVBChannel *ch)
433 {
434         m_active_channels.push_back(active_channel(chid, ch));
435         /* emit */ m_channelAdded(ch);
436         return 0;
437 }
438
439 RESULT eDVBResourceManager::removeChannel(eDVBChannel *ch)
440 {
441         int cnt = 0;
442         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end();)
443         {
444                 if (i->m_channel == ch)
445                 {
446                         i = m_active_channels.erase(i);
447                         ++cnt;
448                 } else
449                         ++i;
450         }
451         ASSERT(cnt == 1);
452         if (cnt == 1)
453                 return 0;
454         return -ENOENT;
455 }
456
457 RESULT eDVBResourceManager::connectChannelAdded(const Slot1<void,eDVBChannel*> &channelAdded, ePtr<eConnection> &connection)
458 {
459         connection = new eConnection((eDVBResourceManager*)this, m_channelAdded.connect(channelAdded));
460         return 0;
461 }
462
463 bool eDVBResourceManager::canAllocateFrontend(ePtr<iDVBFrontendParameters> &feparm)
464 {
465         ePtr<eDVBRegisteredFrontend> best;
466         int bestval = 0;
467
468         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i)
469                 if (!i->m_inuse)
470                 {
471                         int c = i->m_frontend->isCompatibleWith(feparm);
472                         if (c > bestval)
473                                 bestval = c;
474                 }
475
476         return bestval>0;
477 }
478
479 bool eDVBResourceManager::canAllocateChannel(const eDVBChannelID &channelid, const eDVBChannelID& ignore)
480 {
481         bool ret=true;
482         if (m_cached_channel)
483         {
484                 eDVBChannel *cache_chan = (eDVBChannel*)&(*m_cached_channel);
485                 if(channelid==cache_chan->getChannelID())
486                         return ret;
487         }
488
489                 /* first, check if a channel is already existing. */
490 //      eDebug("allocate channel.. %04x:%04x", channelid.transport_stream_id.get(), channelid.original_network_id.get());
491         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
492         {
493 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
494                 if (i->m_channel_id == channelid)
495                 {
496 //                      eDebug("found shared channel..");
497                         return ret;
498                 }
499         }
500
501         int *decremented_cached_channel_fe_usecount=NULL,
502                 *decremented_fe_usecount=NULL;
503
504         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
505         {
506 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
507                 if (i->m_channel_id == ignore)
508                 {
509                         eDVBChannel *channel = (eDVBChannel*) &(*i->m_channel);
510                         if (channel == &(*m_cached_channel) ? channel->getUseCount() == 2 : channel->getUseCount() == 1)  // channel only used once..
511                         {
512                                 ePtr<iDVBFrontend> fe;
513                                 if (!i->m_channel->getFrontend(fe))
514                                 {
515                                         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator ii(m_frontend.begin()); ii != m_frontend.end(); ++ii)
516                                         {
517                                                 if ( &(*fe) == &(*ii->m_frontend) )
518                                                 {
519                                                         --ii->m_inuse;
520                                                         decremented_fe_usecount = &ii->m_inuse;
521                                                         if (channel == &(*m_cached_channel))
522                                                                 decremented_cached_channel_fe_usecount = decremented_fe_usecount;
523                                                         break;
524                                                 }
525                                         }
526                                 }
527                         }
528                         break;
529                 }
530         }
531
532         if (!decremented_cached_channel_fe_usecount)
533         {
534                 if (m_cached_channel)
535                 {
536                         eDVBChannel *channel = (eDVBChannel*) &(*m_cached_channel);
537                         if (channel->getUseCount() == 1)
538                         {
539                                 ePtr<iDVBFrontend> fe;
540                                 if (!channel->getFrontend(fe))
541                                 {
542                                         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator ii(m_frontend.begin()); ii != m_frontend.end(); ++ii)
543                                         {
544                                                 if ( &(*fe) == &(*ii->m_frontend) )
545                                                 {
546                                                         --ii->m_inuse;
547                                                         decremented_cached_channel_fe_usecount = &ii->m_inuse;
548                                                         break;
549                                                 }
550                                         }
551                                 }
552                         }
553                 }
554         }
555         else
556                 decremented_cached_channel_fe_usecount=NULL;
557
558         ePtr<iDVBFrontendParameters> feparm;
559
560         if (!m_list)
561         {
562                 eDebug("no channel list set!");
563                 ret = false;
564                 goto error;
565         }
566
567         if (m_list->getChannelFrontendData(channelid, feparm))
568         {
569                 eDebug("channel not found!");
570                 ret = false;
571                 goto error;
572         }
573
574         ret = canAllocateFrontend(feparm);
575
576 error:
577         if (decremented_fe_usecount)
578                 ++(*decremented_fe_usecount);
579         if (decremented_cached_channel_fe_usecount)
580                 ++(*decremented_cached_channel_fe_usecount);
581
582         return ret;
583 }
584
585 DEFINE_REF(eDVBChannel);
586
587 eDVBChannel::eDVBChannel(eDVBResourceManager *mgr, eDVBAllocatedFrontend *frontend): m_state(state_idle), m_mgr(mgr)
588 {
589         m_frontend = frontend;
590
591         m_pvr_thread = 0;
592         
593         m_skipmode_n = m_skipmode_m = 0;
594         
595         if (m_frontend)
596                 m_frontend->get().connectStateChange(slot(*this, &eDVBChannel::frontendStateChanged), m_conn_frontendStateChanged);
597 }
598
599 eDVBChannel::~eDVBChannel()
600 {
601         if (m_channel_id)
602                 m_mgr->removeChannel(this);
603
604         stopFile();
605 }
606
607 void eDVBChannel::frontendStateChanged(iDVBFrontend*fe)
608 {
609         int state, ourstate = 0;
610         
611                 /* if we are already in shutdown, don't change state. */
612         if (m_state == state_release)
613                 return;
614         
615         if (fe->getState(state))
616                 return;
617         
618         if (state == iDVBFrontend::stateLock)
619         {
620                 eDebug("OURSTATE: ok");
621                 ourstate = state_ok;
622         } else if (state == iDVBFrontend::stateTuning)
623         {
624                 eDebug("OURSTATE: tuning");
625                 ourstate = state_tuning;
626         } else if (state == iDVBFrontend::stateLostLock)
627         {
628                         /* on managed channels, we try to retune in order to re-acquire lock. */
629                 if (m_feparm)
630                 {
631                         eDebug("OURSTATE: lost lock, trying to retune");
632                         ourstate = state_tuning;
633                         m_frontend->get().tune(*m_feparm);
634                 } else
635                         /* on unmanaged channels, we don't do this. the client will do this. */
636                 {
637                         eDebug("OURSTATE: lost lock, unavailable now.");
638                         ourstate = state_unavailable;
639                 }
640         } else if (state == iDVBFrontend::stateFailed)
641         {
642                 eDebug("OURSTATE: failed");
643                 ourstate = state_failed;
644         } else
645                 eFatal("state unknown");
646         
647         if (ourstate != m_state)
648         {
649                 m_state = ourstate;
650                 m_stateChanged(this);
651         }
652 }
653
654 void eDVBChannel::pvrEvent(int event)
655 {
656         switch (event)
657         {
658         case eFilePushThread::evtEOF:
659                 eDebug("eDVBChannel: End of file!");
660                 m_event(this, evtEOF);
661                 break;
662         case eFilePushThread::evtUser: /* start */
663                 eDebug("SOF");
664                 m_event(this, evtSOF);
665                 break;
666         }
667 }
668
669 void eDVBChannel::cueSheetEvent(int event)
670 {
671         switch (event)
672         {
673         case eCueSheet::evtSeek:
674                 eDebug("seek.");
675                 flushPVR(m_cue->m_decoding_demux);
676                 break;
677         case eCueSheet::evtSkipmode:
678         {
679                 {
680                         eSingleLocker l(m_cue->m_lock);
681                         m_cue->m_seek_requests.push_back(std::pair<int, pts_t>(1, 0)); /* resync */
682                         if (m_cue->m_skipmode_ratio)
683                         {
684                                 int bitrate = m_tstools.calcBitrate(); /* in bits/s */
685                                 eDebug("skipmode ratio is %lld:90000, bitrate is %d bit/s", m_cue->m_skipmode_ratio, bitrate);
686                                                 /* i agree that this might look a bit like black magic. */
687                                 m_skipmode_n = 512*1024; /* must be 1 iframe at least. */
688                                 m_skipmode_m = bitrate / 8 / 90000 * m_cue->m_skipmode_ratio / 8;
689                                 
690                                 if (m_cue->m_skipmode_ratio < 0)
691                                         m_skipmode_m -= m_skipmode_n;
692         
693                                 eDebug("resolved to: %d %d", m_skipmode_m, m_skipmode_n);
694                                 
695                                 if (abs(m_skipmode_m) < abs(m_skipmode_n))
696                                 {
697                                         eWarning("something is wrong with this calculation");
698                                         m_skipmode_n = m_skipmode_m = 0;
699                                 }
700                                 
701                         } else
702                         {
703                                 eDebug("skipmode ratio is 0, normal play");
704                                 m_skipmode_n = m_skipmode_m = 0;
705                         }
706                 }
707                 flushPVR(m_cue->m_decoding_demux);
708                 break;
709         }
710         case eCueSheet::evtSpanChanged:
711                 eDebug("source span translation not yet supported");
712         //      recheckCuesheetSpans();
713                 break;
714         }
715 }
716
717         /* remember, this gets called from another thread. */
718 void eDVBChannel::getNextSourceSpan(off_t current_offset, size_t bytes_read, off_t &start, size_t &size)
719 {
720         unsigned int max = 10*1024*1024;
721         
722         if (!m_cue)
723         {
724                 eDebug("no cue sheet. forcing normal play");
725                 start = current_offset;
726                 size = max;
727                 return;
728         }
729
730         eSingleLocker l(m_cue->m_lock);
731         
732         if (!m_cue->m_decoding_demux)
733         {
734                 start = current_offset;
735                 size = max;
736                 eDebug("getNextSourceSpan, no decoding demux. forcing normal play");
737                 return;
738         }
739         
740         if (m_skipmode_n)
741         {
742                 eDebug("skipmode %d:%d", m_skipmode_m, m_skipmode_n);
743                 max = m_skipmode_n;
744         }
745         
746         eDebug("getNextSourceSpan, current offset is %08llx!", current_offset);
747         
748         if ((current_offset < -m_skipmode_m) && (m_skipmode_m < 0))
749         {
750                 eDebug("reached SOF");
751                 m_skipmode_m = 0;
752                 m_pvr_thread->sendEvent(eFilePushThread::evtUser);
753         }
754         
755         current_offset += m_skipmode_m;
756         
757         while (!m_cue->m_seek_requests.empty())
758         {
759                 std::pair<int, pts_t> seek = m_cue->m_seek_requests.front();
760                 m_cue->m_seek_requests.pop_front();
761                 int relative = seek.first;
762                 pts_t pts = seek.second;
763
764                 int bitrate = m_tstools.calcBitrate(); /* in bits/s */
765         
766                 if (bitrate == -1)
767                         continue;
768         
769                 if (relative)
770                 {
771                         pts_t now;
772                         if (!m_cue->m_decoder)
773                         {
774                                 eDebug("no decoder - can't seek relative");
775                                 continue;
776                         }
777                         if (m_cue->m_decoder->getPTS(0, now))
778                         {
779                                 eDebug("decoder getPTS failed, can't seek relative");
780                                 continue;
781                         }
782                         if (getCurrentPosition(m_cue->m_decoding_demux, now, 1))
783                         {
784                                 eDebug("seekTo: getCurrentPosition failed!");
785                                 continue;
786                         }
787                         pts += now;
788                 }
789         
790                 if (pts < 0)
791                         pts = 0;
792         
793                 off_t offset = (pts * (pts_t)bitrate) / 8ULL / 90000ULL;
794                 
795                 eDebug("ok, resolved skip (rel: %d, diff %lld), now at %08llx", relative, pts, offset);
796                 current_offset = offset;
797         }
798         
799         for (std::list<std::pair<off_t, off_t> >::const_iterator i(m_source_span.begin()); i != m_source_span.end(); ++i)
800         {
801                 if ((current_offset >= i->first) && (current_offset < i->second))
802                 {
803                         start = current_offset;
804                         size = i->second - current_offset;
805                         if (size > max)
806                                 size = max;
807                         eDebug("HIT, %lld < %lld < %lld", i->first, current_offset, i->second);
808                         return;
809                 }
810                 if (current_offset < i->first)
811                 {
812                         start = i->first;
813                         size = i->second - i->first;
814                         if (size > max)
815                                 size = max;
816                         eDebug("skip");
817                         return;
818                 }
819         }
820         
821         start = current_offset;
822         size = max;
823         eDebug("END OF CUESHEET. (%08llx, %d)", start, size);
824         
825         if (size < 4096)
826                 eFatal("blub");
827         return;
828 }
829
830 void eDVBChannel::AddUse()
831 {
832         if (++m_use_count > 1 && m_state == state_last_instance)
833         {
834                 m_state = state_ok;
835                 m_stateChanged(this);
836         }
837 }
838
839 void eDVBChannel::ReleaseUse()
840 {
841         if (!--m_use_count)
842         {
843                 m_state = state_release;
844                 m_stateChanged(this);
845         }
846         else if (m_use_count == 1)
847         {
848                 m_state = state_last_instance;
849                 m_stateChanged(this);
850         }
851 }
852
853 RESULT eDVBChannel::setChannel(const eDVBChannelID &channelid, ePtr<iDVBFrontendParameters> &feparm)
854 {
855         if (m_channel_id)
856                 m_mgr->removeChannel(this);
857                 
858         if (!channelid)
859                 return 0;
860
861         if (!m_frontend)
862         {
863                 eDebug("no frontend to tune!");
864                 return -ENODEV;
865         }
866         
867         m_channel_id = channelid;
868         m_mgr->addChannel(channelid, this);
869         m_state = state_tuning;
870                         /* if tuning fails, shutdown the channel immediately. */
871         int res;
872         res = m_frontend->get().tune(*feparm);
873         m_feparm = feparm;
874         
875         if (res)
876         {
877                 m_state = state_release;
878                 m_stateChanged(this);
879                 return res;
880         }
881         
882         return 0;
883 }
884
885 RESULT eDVBChannel::connectStateChange(const Slot1<void,iDVBChannel*> &stateChange, ePtr<eConnection> &connection)
886 {
887         connection = new eConnection((iDVBChannel*)this, m_stateChanged.connect(stateChange));
888         return 0;
889 }
890
891 RESULT eDVBChannel::connectEvent(const Slot2<void,iDVBChannel*,int> &event, ePtr<eConnection> &connection)
892 {
893         connection = new eConnection((iDVBChannel*)this, m_event.connect(event));
894         return 0;
895 }
896
897 RESULT eDVBChannel::getState(int &state)
898 {
899         state = m_state;
900         return 0;
901 }
902
903 RESULT eDVBChannel::setCIRouting(const eDVBCIRouting &routing)
904 {
905         return -1;
906 }
907
908 RESULT eDVBChannel::getDemux(ePtr<iDVBDemux> &demux, int cap)
909 {
910         ePtr<eDVBAllocatedDemux> &our_demux = (cap & capDecode) ? m_decoder_demux : m_demux;
911         
912         if (!our_demux)
913         {
914                 demux = 0;
915                 
916                 if (m_mgr->allocateDemux(m_frontend ? (eDVBRegisteredFrontend*)*m_frontend : (eDVBRegisteredFrontend*)0, our_demux, cap))
917                         return -1;
918         }
919         
920         demux = *our_demux;
921                 /* don't hold a reference to the decoding demux, we don't need it. */
922         if (cap & capDecode)
923                 our_demux = 0;
924         return 0;
925 }
926
927 RESULT eDVBChannel::getFrontend(ePtr<iDVBFrontend> &frontend)
928 {
929         frontend = &m_frontend->get();
930         if (frontend)
931                 return 0;
932         else
933                 return -ENODEV;
934 }
935
936 RESULT eDVBChannel::playFile(const char *file)
937 {
938         ASSERT(!m_frontend);
939         if (m_pvr_thread)
940         {
941                 m_pvr_thread->stop();
942                 delete m_pvr_thread;
943                 m_pvr_thread = 0;
944         }
945         
946         m_tstools.openFile(file);
947         
948                 /* DON'T EVEN THINK ABOUT FIXING THIS. FIX THE ATI SOURCES FIRST,
949                    THEN DO A REAL FIX HERE! */
950         
951                 /* (this codepath needs to be improved anyway.) */
952         m_pvr_fd_dst = open("/dev/misc/pvr", O_WRONLY);
953         if (m_pvr_fd_dst < 0)
954         {
955                 eDebug("can't open /dev/misc/pvr - you need to buy the new(!) $$$ box! (%m)"); // or wait for the driver to be improved.
956                 return -ENODEV;
957         }
958         
959         m_pvr_fd_src = open(file, O_RDONLY|O_LARGEFILE);
960         if (m_pvr_fd_src < 0)
961         {
962                 eDebug("can't open PVR m_pvr_fd_src file %s (%m)", file);
963                 close(m_pvr_fd_dst);
964                 return -ENOENT;
965         }
966         
967         m_state = state_ok;
968         m_stateChanged(this);
969         
970         m_pvr_thread = new eFilePushThread();
971         m_pvr_thread->enablePVRCommit(1);
972         m_pvr_thread->setScatterGather(this);
973
974         m_pvr_thread->start(m_pvr_fd_src, m_pvr_fd_dst);
975         CONNECT(m_pvr_thread->m_event, eDVBChannel::pvrEvent);
976
977         return 0;
978 }
979
980 void eDVBChannel::stopFile()
981 {
982         if (m_pvr_thread)
983         {
984                 m_pvr_thread->stop();
985                 ::close(m_pvr_fd_src);
986                 ::close(m_pvr_fd_dst);
987                 delete m_pvr_thread;
988                 m_pvr_thread = 0;
989         }
990 }
991
992 void eDVBChannel::setCueSheet(eCueSheet *cuesheet)
993 {
994         m_conn_cueSheetEvent = 0;
995         m_cue = cuesheet;
996         if (m_cue)
997                 m_cue->connectEvent(slot(*this, &eDVBChannel::cueSheetEvent), m_conn_cueSheetEvent);
998 }
999
1000 RESULT eDVBChannel::getLength(pts_t &len)
1001 {
1002         return m_tstools.calcLen(len);
1003 }
1004
1005 RESULT eDVBChannel::getCurrentPosition(iDVBDemux *decoding_demux, pts_t &pos, int mode)
1006 {
1007         if (!decoding_demux)
1008                 return -1;
1009         
1010         pts_t now;
1011         
1012         int r;
1013         
1014         if (mode == 0) /* demux */
1015         {
1016                 r = decoding_demux->getSTC(now, 0);
1017                 if (r)
1018                 {
1019                         eDebug("demux getSTC failed");
1020                         return -1;
1021                 }
1022         } else
1023                 now = pos; /* fixup supplied */
1024         
1025         off_t off = 0; /* TODO: fixme */
1026         r = m_tstools.fixupPTS(off, now);
1027         if (r)
1028         {
1029                 eDebug("fixup PTS failed");
1030                 return -1;
1031         }
1032         
1033         pos = now;
1034         
1035         return 0;
1036 }
1037
1038 void eDVBChannel::flushPVR(iDVBDemux *decoding_demux)
1039 {
1040                         /* when seeking, we have to ensure that all buffers are flushed.
1041                            there are basically 3 buffers:
1042                            a.) the filepush's internal buffer
1043                            b.) the PVR buffer (before demux)
1044                            c.) the ratebuffer (after demux)
1045                            
1046                            it's important to clear them in the correct order, otherwise
1047                            the ratebuffer (for example) would immediately refill from
1048                            the not-yet-flushed PVR buffer.
1049                         */
1050
1051         m_pvr_thread->pause();
1052                 /* flush internal filepush buffer */
1053         m_pvr_thread->flush();
1054                 /* HACK: flush PVR buffer */
1055         ::ioctl(m_pvr_fd_dst, 0);
1056         
1057                 /* flush ratebuffers (video, audio) */
1058         if (decoding_demux)
1059                 decoding_demux->flush();
1060
1061                 /* demux will also flush all decoder.. */
1062                 /* resume will re-query the SG */
1063         m_pvr_thread->resume();
1064 }
1065
1066 DEFINE_REF(eCueSheet);
1067
1068 eCueSheet::eCueSheet()
1069 {
1070         m_skipmode_ratio = 0;
1071 }
1072
1073 void eCueSheet::seekTo(int relative, const pts_t &pts)
1074 {
1075         {
1076                 eSingleLock l(m_lock);
1077                 m_seek_requests.push_back(std::pair<int, pts_t>(relative, pts));
1078         }
1079         m_event(evtSeek);
1080 }
1081         
1082 void eCueSheet::clear()
1083 {
1084         eSingleLock l(m_lock);
1085         m_spans.clear();
1086 }
1087
1088 void eCueSheet::addSourceSpan(const pts_t &begin, const pts_t &end)
1089 {
1090         {
1091                 eSingleLock l(m_lock);
1092                 m_spans.push_back(std::pair<pts_t, pts_t>(begin, end));
1093         }
1094         m_event(evtSpanChanged);
1095 }
1096
1097 void eCueSheet::setSkipmode(const pts_t &ratio)
1098 {
1099         {
1100                 eSingleLock l(m_lock);
1101                 m_skipmode_ratio = ratio;
1102         }
1103         m_event(evtSkipmode);
1104 }
1105
1106 void eCueSheet::setDecodingDemux(iDVBDemux *demux, iTSMPEGDecoder *decoder)
1107 {
1108         m_decoding_demux = demux;
1109         m_decoder = decoder;
1110 }
1111
1112 RESULT eCueSheet::connectEvent(const Slot1<void,int> &event, ePtr<eConnection> &connection)
1113 {
1114         connection = new eConnection(this, m_event.connect(event));
1115         return 0;
1116 }