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 {
  47         avail = 1;
  48         busy = 0;
  49         m_sec = new eDVBSatelliteEquipmentControl(m_frontend);
  50         if (!instance)
  51                 instance = this;
  52
  53                 /* search available adapters... */
  54
  55                 // add linux devices
  56
  57         int num_adapter = 0;
  58         while (eDVBAdapterLinux::exist(num_adapter))
  59         {
  60                 addAdapter(new eDVBAdapterLinux(num_adapter));
  61                 num_adapter++;
  62         }
  63
  64         eDebug("found %d adapter, %d frontends and %d demux",
  65                 m_adapter.size(), m_frontend.size(), m_demux.size());
  66 }
  67
  68
  69 DEFINE_REF(eDVBAdapterLinux);
  70 eDVBAdapterLinux::eDVBAdapterLinux(int nr): m_nr(nr)
  71 {
  72                 // scan frontends
  73         int num_fe = 0;
  74
  75         eDebug("scanning for frontends..");
  76         while (1)
  77         {
  78                 struct stat s;
  79                 char filename[128];
  80 #if HAVE_DVB_API_VERSION < 3
  81                 sprintf(filename, "/dev/dvb/card%d/frontend%d", m_nr, num_fe);
  82 #else
  83                 sprintf(filename, "/dev/dvb/adapter%d/frontend%d", m_nr, num_fe);
  84 #endif
  85                 if (stat(filename, &s))
  86                         break;
  87                 ePtr<eDVBFrontend> fe;
  88
  89                 int ok = 0;
  90                 fe = new eDVBFrontend(m_nr, num_fe, ok);
  91                 if (ok)
  92                         m_frontend.push_back(fe);
  93                 ++num_fe;
  94         }
  95
  96                 // scan demux
  97         int num_demux = 0;
  98         while (1)
  99         {
 100                 struct stat s;
 101                 char filename[128];
 102 #if HAVE_DVB_API_VERSION < 3
 103                 sprintf(filename, "/dev/dvb/card%d/demux%d", m_nr, num_demux);
 104 #else
 105                 sprintf(filename, "/dev/dvb/adapter%d/demux%d", m_nr, num_demux);
 106 #endif
 107                 if (stat(filename, &s))
 108                         break;
 109                 ePtr<eDVBDemux> demux;
 110
 111                 demux = new eDVBDemux(m_nr, num_demux);
 112                 m_demux.push_back(demux);
 113
 114                 ++num_demux;
 115         }
 116 }
 117
 118 int eDVBAdapterLinux::getNumDemux()
 119 {
 120         return m_demux.size();
 121 }
 122
 123 RESULT eDVBAdapterLinux::getDemux(ePtr<eDVBDemux> &demux, int nr)
 124 {
 125         eSmartPtrList<eDVBDemux>::iterator i(m_demux.begin());
 126         while (nr && (i != m_demux.end()))
 127         {
 128                 --nr;
 129                 ++i;
 130         }
 131
 132         if (i != m_demux.end())
 133                 demux = *i;
 134         else
 135                 return -1;
 136
 137         return 0;
 138 }
 139
 140 int eDVBAdapterLinux::getNumFrontends()
 141 {
 142         return m_frontend.size();
 143 }
 144
 145 RESULT eDVBAdapterLinux::getFrontend(ePtr<eDVBFrontend> &fe, int nr)
 146 {
 147         eSmartPtrList<eDVBFrontend>::iterator i(m_frontend.begin());
 148         while (nr && (i != m_frontend.end()))
 149         {
 150                 --nr;
 151                 ++i;
 152         }
 153
 154         if (i != m_frontend.end())
 155                 fe = *i;
 156         else
 157                 return -1;
 158
 159         return 0;
 160 }
 161
 162 int eDVBAdapterLinux::exist(int nr)
 163 {
 164         struct stat s;
 165         char filename[128];
 166 #if HAVE_DVB_API_VERSION < 3
 167         sprintf(filename, "/dev/dvb/card%d", nr);
 168 #else
 169         sprintf(filename, "/dev/dvb/adapter%d", nr);
 170 #endif
 171         if (!stat(filename, &s))
 172                 return 1;
 173         return 0;
 174 }
 175
 176 eDVBResourceManager::~eDVBResourceManager()
 177 {
 178         if (instance == this)
 179                 instance = 0;
 180 }
 181
 182 void eDVBResourceManager::addAdapter(iDVBAdapter *adapter)
 183 {
 184         int num_fe = adapter->getNumFrontends();
 185         int num_demux = adapter->getNumDemux();
 186
 187         m_adapter.push_back(adapter);
 188
 189         int i;
 190         for (i=0; i<num_demux; ++i)
 191         {
 192                 ePtr<eDVBDemux> demux;
 193                 if (!adapter->getDemux(demux, i))
 194                         m_demux.push_back(new eDVBRegisteredDemux(demux, adapter));
 195         }
 196
 197         for (i=0; i<num_fe; ++i)
 198         {
 199                 ePtr<eDVBFrontend> frontend;
 200
 201                 if (!adapter->getFrontend(frontend, i))
 202                 {
 203                         frontend->setSEC(m_sec);
 204                         m_frontend.push_back(new eDVBRegisteredFrontend(frontend, adapter));
 205                 }
 206         }
 207 }
 208
 209 RESULT eDVBResourceManager::allocateFrontend(ePtr<eDVBAllocatedFrontend> &fe, ePtr<iDVBFrontendParameters> &feparm)
 210 {
 211         ePtr<eDVBRegisteredFrontend> best;
 212         int bestval = 0;
 213
 214         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i)
 215                 if (!i->m_inuse)
 216                 {
 217                         int c = i->m_frontend->isCompatibleWith(feparm);
 218                         if (c > bestval)
 219                         {
 220                                 bestval = c;
 221                                 best = i;
 222                         }
 223                 }
 224
 225         if (best)
 226         {
 227                 fe = new eDVBAllocatedFrontend(best);
 228                 return 0;
 229         }
 230
 231         fe = 0;
 232
 233         return -1;
 234 }
 235
 236 RESULT eDVBResourceManager::allocateFrontendByIndex(ePtr<eDVBAllocatedFrontend> &fe, int nr)
 237 {
 238         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i, --nr)
 239                 if ((!nr) && !i->m_inuse)
 240                 {
 241                         fe = new eDVBAllocatedFrontend(i);
 242                         return 0;
 243                 }
 244
 245         fe = 0;
 246         return -1;
 247 }
 248
 249 RESULT eDVBResourceManager::allocateDemux(eDVBRegisteredFrontend *fe, ePtr<eDVBAllocatedDemux> &demux, int cap)
 250 {
 251                 /* find first unused demux which is on same adapter as frontend (or any, if PVR)
 252                    never use the first one unless we need a decoding demux. */
 253
 254         eDebug("allocate demux");
 255         eSmartPtrList<eDVBRegisteredDemux>::iterator i(m_demux.begin());
 256
 257         if (i == m_demux.end())
 258                 return -1;
 259
 260         int n=0;
 261                 /* FIXME: hardware demux policy */
 262         if (!(cap & iDVBChannel::capDecode))
 263                 ++i, ++n;
 264
 265         for (; i != m_demux.end(); ++i, ++n)
 266                 if ((!i->m_inuse) && ((!fe) || (i->m_adapter == fe->m_adapter)))
 267                 {
 268                         if ((cap & iDVBChannel::capDecode) && n)
 269                                 continue;
 270
 271                         demux = new eDVBAllocatedDemux(i);
 272                         if (fe)
 273                                 demux->get().setSourceFrontend(fe->m_frontend->getID());
 274                         else
 275                                 demux->get().setSourcePVR(0);
 276                         return 0;
 277                 }
 278         eDebug("demux not found");
 279         return -1;
 280 }
 281
 282 RESULT eDVBResourceManager::setChannelList(iDVBChannelList *list)
 283 {
 284         m_list = list;
 285         return 0;
 286 }
 287
 288 RESULT eDVBResourceManager::getChannelList(ePtr<iDVBChannelList> &list)
 289 {
 290         list = m_list;
 291         if (list)
 292                 return 0;
 293         else
 294                 return -ENOENT;
 295 }
 296
 297 RESULT eDVBResourceManager::allocateChannel(const eDVBChannelID &channelid, eUsePtr<iDVBChannel> &channel)
 298 {
 299                 /* first, check if a channel is already existing. */
 300
 301         if (m_cached_channel)
 302         {
 303                 eDVBChannel *cache_chan = (eDVBChannel*)&(*m_cached_channel);
 304                 if(channelid==cache_chan->getChannelID())
 305                 {
 306                         eDebug("use cached_channel");
 307                         channel = m_cached_channel;
 308                         return 0;
 309                 }
 310                 m_cached_channel=0;
 311         }
 312
 313 //      eDebug("allocate channel.. %04x:%04x", channelid.transport_stream_id.get(), channelid.original_network_id.get());
 314         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
 315         {
 316 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
 317                 if (i->m_channel_id == channelid)
 318                 {
 319 //                      eDebug("found shared channel..");
 320                         channel = i->m_channel;
 321                         return 0;
 322                 }
 323         }
 324
 325         /* no currently available channel is tuned to this channelid. create a new one, if possible. */
 326
 327         if (!m_list)
 328         {
 329                 eDebug("no channel list set!");
 330                 return -ENOENT;
 331         }
 332
 333         ePtr<iDVBFrontendParameters> feparm;
 334         if (m_list->getChannelFrontendData(channelid, feparm))
 335         {
 336                 eDebug("channel not found!");
 337                 return -ENOENT;
 338         }
 339
 340         /* allocate a frontend. */
 341
 342         ePtr<eDVBAllocatedFrontend> fe;
 343
 344         if (allocateFrontend(fe, feparm))
 345                 return errNoFrontend;
 346
 347         RESULT res;
 348         ePtr<eDVBChannel> ch;
 349         ch = new eDVBChannel(this, fe);
 350
 351         res = ch->setChannel(channelid, feparm);
 352         if (res)
 353         {
 354                 channel = 0;
 355                 return errChidNotFound;
 356         }
 357         m_cached_channel = channel = ch;
 358
 359         return 0;
 360 }
 361
 362 RESULT eDVBResourceManager::allocateRawChannel(eUsePtr<iDVBChannel> &channel, int frontend_index)
 363 {
 364         ePtr<eDVBAllocatedFrontend> fe;
 365
 366         if (m_cached_channel)
 367                 m_cached_channel=0;
 368
 369         if (allocateFrontendByIndex(fe, frontend_index))
 370                 return errNoFrontend;
 371
 372         eDVBChannel *ch;
 373         ch = new eDVBChannel(this, fe);
 374
 375         channel = ch;
 376         return 0;
 377 }
 378
 379
 380 RESULT eDVBResourceManager::allocatePVRChannel(eUsePtr<iDVBPVRChannel> &channel)
 381 {
 382         ePtr<eDVBAllocatedDemux> demux;
 383
 384         if (m_cached_channel)
 385                 m_cached_channel=0;
 386
 387         eDVBChannel *ch;
 388         ch = new eDVBChannel(this, 0);
 389
 390         channel = ch;
 391         return 0;
 392 }
 393
 394 RESULT eDVBResourceManager::addChannel(const eDVBChannelID &chid, eDVBChannel *ch)
 395 {
 396         m_active_channels.push_back(active_channel(chid, ch));
 397         /* emit */ m_channelAdded(ch);
 398         return 0;
 399 }
 400
 401 RESULT eDVBResourceManager::removeChannel(eDVBChannel *ch)
 402 {
 403         int cnt = 0;
 404         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end();)
 405         {
 406                 if (i->m_channel == ch)
 407                 {
 408                         i = m_active_channels.erase(i);
 409                         ++cnt;
 410                 } else
 411                         ++i;
 412         }
 413         ASSERT(cnt == 1);
 414         if (cnt == 1)
 415                 return 0;
 416         return -ENOENT;
 417 }
 418
 419 RESULT eDVBResourceManager::connectChannelAdded(const Slot1<void,eDVBChannel*> &channelAdded, ePtr<eConnection> &connection)
 420 {
 421         connection = new eConnection((eDVBResourceManager*)this, m_channelAdded.connect(channelAdded));
 422         return 0;
 423 }
 424
 425 bool eDVBResourceManager::canAllocateFrontend(ePtr<iDVBFrontendParameters> &feparm)
 426 {
 427         ePtr<eDVBRegisteredFrontend> best;
 428         int bestval = 0;
 429
 430         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator i(m_frontend.begin()); i != m_frontend.end(); ++i)
 431                 if (!i->m_inuse)
 432                 {
 433                         int c = i->m_frontend->isCompatibleWith(feparm);
 434                         if (c > bestval)
 435                                 bestval = c;
 436                 }
 437
 438         return bestval>0;
 439 }
 440
 441 bool eDVBResourceManager::canAllocateChannel(const eDVBChannelID &channelid, const eDVBChannelID& ignore)
 442 {
 443         bool ret=true;
 444         if (m_cached_channel)
 445         {
 446                 eDVBChannel *cache_chan = (eDVBChannel*)&(*m_cached_channel);
 447                 if(channelid==cache_chan->getChannelID())
 448                         return ret;
 449         }
 450
 451                 /* first, check if a channel is already existing. */
 452 //      eDebug("allocate channel.. %04x:%04x", channelid.transport_stream_id.get(), channelid.original_network_id.get());
 453         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
 454         {
 455 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
 456                 if (i->m_channel_id == channelid)
 457                 {
 458 //                      eDebug("found shared channel..");
 459                         return ret;
 460                 }
 461         }
 462
 463         int *decremented_cached_channel_fe_usecount=NULL,
 464                 *decremented_fe_usecount=NULL;
 465
 466         for (std::list<active_channel>::iterator i(m_active_channels.begin()); i != m_active_channels.end(); ++i)
 467         {
 468 //              eDebug("available channel.. %04x:%04x", i->m_channel_id.transport_stream_id.get(), i->m_channel_id.original_network_id.get());
 469                 if (i->m_channel_id == ignore)
 470                 {
 471                         eDVBChannel *channel = (eDVBChannel*) &(*i->m_channel);
 472                         if (channel == &(*m_cached_channel) ? channel->getUseCount() == 2 : channel->getUseCount() == 1)  // channel only used once..
 473                         {
 474                                 ePtr<iDVBFrontend> fe;
 475                                 if (!i->m_channel->getFrontend(fe))
 476                                 {
 477                                         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator ii(m_frontend.begin()); ii != m_frontend.end(); ++ii)
 478                                         {
 479                                                 if ( &(*fe) == &(*ii->m_frontend) )
 480                                                 {
 481                                                         --ii->m_inuse;
 482                                                         decremented_fe_usecount = &ii->m_inuse;
 483                                                         if (channel == &(*m_cached_channel))
 484                                                                 decremented_cached_channel_fe_usecount = decremented_fe_usecount;
 485                                                         break;
 486                                                 }
 487                                         }
 488                                 }
 489                         }
 490                         break;
 491                 }
 492         }
 493
 494         if (!decremented_cached_channel_fe_usecount)
 495         {
 496                 if (m_cached_channel)
 497                 {
 498                         eDVBChannel *channel = (eDVBChannel*) &(*m_cached_channel);
 499                         if (channel->getUseCount() == 1)
 500                         {
 501                                 ePtr<iDVBFrontend> fe;
 502                                 if (!channel->getFrontend(fe))
 503                                 {
 504                                         for (eSmartPtrList<eDVBRegisteredFrontend>::iterator ii(m_frontend.begin()); ii != m_frontend.end(); ++ii)
 505                                         {
 506                                                 if ( &(*fe) == &(*ii->m_frontend) )
 507                                                 {
 508                                                         --ii->m_inuse;
 509                                                         decremented_cached_channel_fe_usecount = &ii->m_inuse;
 510                                                         break;
 511                                                 }
 512                                         }
 513                                 }
 514                         }
 515                 }
 516         }
 517         else
 518                 decremented_cached_channel_fe_usecount=NULL;
 519
 520         ePtr<iDVBFrontendParameters> feparm;
 521
 522         if (!m_list)
 523         {
 524                 eDebug("no channel list set!");
 525                 ret = false;
 526                 goto error;
 527         }
 528
 529         if (m_list->getChannelFrontendData(channelid, feparm))
 530         {
 531                 eDebug("channel not found!");
 532                 ret = false;
 533                 goto error;
 534         }
 535
 536         ret = canAllocateFrontend(feparm);
 537
 538 error:
 539         if (decremented_fe_usecount)
 540                 ++(*decremented_fe_usecount);
 541         if (decremented_cached_channel_fe_usecount)
 542                 ++(*decremented_cached_channel_fe_usecount);
 543
 544         return ret;
 545 }
 546
 547 DEFINE_REF(eDVBChannel);
 548
 549 eDVBChannel::eDVBChannel(eDVBResourceManager *mgr, eDVBAllocatedFrontend *frontend): m_state(state_idle), m_mgr(mgr)
 550 {
 551         m_frontend = frontend;
 552
 553         m_pvr_thread = 0;
 554
 555         if (m_frontend)
 556                 m_frontend->get().connectStateChange(slot(*this, &eDVBChannel::frontendStateChanged), m_conn_frontendStateChanged);
 557 }
 558
 559 eDVBChannel::~eDVBChannel()
 560 {
 561         if (m_channel_id)
 562                 m_mgr->removeChannel(this);
 563
 564         if (m_pvr_thread)
 565         {
 566                 m_pvr_thread->stop();
 567                 ::close(m_pvr_fd_src);
 568                 ::close(m_pvr_fd_dst);
 569                 delete m_pvr_thread;
 570         }
 571 }
 572
 573 void eDVBChannel::frontendStateChanged(iDVBFrontend*fe)
 574 {
 575         int state, ourstate = 0;
 576
 577                 /* if we are already in shutdown, don't change state. */
 578         if (m_state == state_release)
 579                 return;
 580
 581         if (fe->getState(state))
 582                 return;
 583
 584         if (state == iDVBFrontend::stateLock)
 585         {
 586                 eDebug("OURSTATE: ok");
 587                 ourstate = state_ok;
 588         } else if (state == iDVBFrontend::stateTuning)
 589         {
 590                 eDebug("OURSTATE: tuning");
 591                 ourstate = state_tuning;
 592         } else if (state == iDVBFrontend::stateLostLock)
 593         {
 594                         /* on managed channels, we try to retune in order to re-acquire lock. */
 595                 if (m_feparm)
 596                 {
 597                         eDebug("OURSTATE: lost lock, trying to retune");
 598                         ourstate = state_tuning;
 599                         m_frontend->get().tune(*m_feparm);
 600                 } else
 601                         /* on unmanaged channels, we don't do this. the client will do this. */
 602                 {
 603                         eDebug("OURSTATE: lost lock, unavailable now.");
 604                         ourstate = state_unavailable;
 605                 }
 606         } else if (state == iDVBFrontend::stateFailed)
 607         {
 608                 eDebug("OURSTATE: failed");
 609                 ourstate = state_failed;
 610         } else
 611                 eFatal("state unknown");
 612
 613         if (ourstate != m_state)
 614         {
 615                 m_state = ourstate;
 616                 m_stateChanged(this);
 617         }
 618 }
 619
 620 void eDVBChannel::pvrEvent(int event)
 621 {
 622         switch (event)
 623         {
 624         case eFilePushThread::evtEOF:
 625                 eDebug("eDVBChannel: End of file!");
 626                 m_event(this, evtEOF);
 627                 break;
 628         }
 629 }
 630
 631 void eDVBChannel::AddUse()
 632 {
 633         ++m_use_count;
 634 }
 635
 636 void eDVBChannel::ReleaseUse()
 637 {
 638         if (!--m_use_count)
 639         {
 640                 m_state = state_release;
 641                 m_stateChanged(this);
 642         }
 643 }
 644
 645 RESULT eDVBChannel::setChannel(const eDVBChannelID &channelid, ePtr<iDVBFrontendParameters> &feparm)
 646 {
 647         if (m_channel_id)
 648                 m_mgr->removeChannel(this);
 649
 650         if (!channelid)
 651                 return 0;
 652
 653         if (!m_frontend)
 654         {
 655                 eDebug("no frontend to tune!");
 656                 return -ENODEV;
 657         }
 658
 659         m_channel_id = channelid;
 660         m_mgr->addChannel(channelid, this);
 661         m_state = state_tuning;
 662                         /* if tuning fails, shutdown the channel immediately. */
 663         int res;
 664         res = m_frontend->get().tune(*feparm);
 665         m_feparm = feparm;
 666
 667         if (res)
 668         {
 669                 m_state = state_release;
 670                 m_stateChanged(this);
 671                 return res;
 672         }
 673
 674         return 0;
 675 }
 676
 677 RESULT eDVBChannel::connectStateChange(const Slot1<void,iDVBChannel*> &stateChange, ePtr<eConnection> &connection)
 678 {
 679         connection = new eConnection((iDVBChannel*)this, m_stateChanged.connect(stateChange));
 680         return 0;
 681 }
 682
 683 RESULT eDVBChannel::connectEvent(const Slot2<void,iDVBChannel*,int> &event, ePtr<eConnection> &connection)
 684 {
 685         connection = new eConnection((iDVBChannel*)this, m_event.connect(event));
 686         return 0;
 687 }
 688
 689 RESULT eDVBChannel::getState(int &state)
 690 {
 691         state = m_state;
 692         return 0;
 693 }
 694
 695 RESULT eDVBChannel::setCIRouting(const eDVBCIRouting &routing)
 696 {
 697         return -1;
 698 }
 699
 700 RESULT eDVBChannel::getDemux(ePtr<iDVBDemux> &demux, int cap)
 701 {
 702         ePtr<eDVBAllocatedDemux> &our_demux = (cap & capDecode) ? m_decoder_demux : m_demux;
 703
 704         if (!our_demux)
 705         {
 706                 demux = 0;
 707
 708                 if (m_mgr->allocateDemux(m_frontend ? (eDVBRegisteredFrontend*)*m_frontend : (eDVBRegisteredFrontend*)0, our_demux, cap))
 709                         return -1;
 710         }
 711
 712         demux = *our_demux;
 713                 /* don't hold a reference to the decoding demux, we don't need it. */
 714         if (cap & capDecode)
 715                 our_demux = 0;
 716         return 0;
 717 }
 718
 719 RESULT eDVBChannel::getFrontend(ePtr<iDVBFrontend> &frontend)
 720 {
 721         frontend = &m_frontend->get();
 722         if (frontend)
 723                 return 0;
 724         else
 725                 return -ENODEV;
 726 }
 727
 728 RESULT eDVBChannel::playFile(const char *file)
 729 {
 730         ASSERT(!m_frontend);
 731         if (m_pvr_thread)
 732         {
 733                 m_pvr_thread->stop();
 734                 delete m_pvr_thread;
 735                 m_pvr_thread = 0;
 736         }
 737
 738         m_tstools.openFile(file);
 739
 740                 /* DON'T EVEN THINK ABOUT FIXING THIS. FIX THE ATI SOURCES FIRST,
 741                    THEN DO A REAL FIX HERE! */
 742
 743                 /* (this codepath needs to be improved anyway.) */
 744         m_pvr_fd_dst = open("/dev/misc/pvr", O_WRONLY);
 745         if (m_pvr_fd_dst < 0)
 746         {
 747                 eDebug("can't open /dev/misc/pvr - you need to buy the new(!) $$$ box! (%m)"); // or wait for the driver to be improved.
 748                 return -ENODEV;
 749         }
 750
 751         m_pvr_fd_src = open(file, O_RDONLY|O_LARGEFILE);
 752         if (m_pvr_fd_src < 0)
 753         {
 754                 eDebug("can't open PVR m_pvr_fd_src file %s (%m)", file);
 755                 close(m_pvr_fd_dst);
 756                 return -ENOENT;
 757         }
 758
 759         m_state = state_ok;
 760         m_stateChanged(this);
 761
 762         m_pvr_thread = new eFilePushThread();
 763         m_pvr_thread->enablePVRCommit(1);
 764         m_pvr_thread->start(m_pvr_fd_src, m_pvr_fd_dst);
 765         CONNECT(m_pvr_thread->m_event, eDVBChannel::pvrEvent);
 766
 767         return 0;
 768 }
 769
 770 RESULT eDVBChannel::getLength(pts_t &len)
 771 {
 772         return m_tstools.calcLen(len);
 773 }
 774
 775 RESULT eDVBChannel::getCurrentPosition(iDVBDemux *decoding_demux, pts_t &pos, int mode)
 776 {
 777         if (!decoding_demux)
 778                 return -1;
 779
 780         off_t begin = 0;
 781                 /* getPTS for offset 0 is cached, so it doesn't harm. */
 782         int r = m_tstools.getPTS(begin, pos);
 783         if (r)
 784         {
 785                 eDebug("tstools getpts(0) failed!");
 786                 return r;
 787         }
 788
 789         pts_t now;
 790
 791                         /* TODO: this is a gross hack. */
 792         r = decoding_demux->getSTC(now, mode ? 128 : 0);
 793
 794         if (r)
 795         {
 796                 eDebug("demux getSTC failed");
 797                 return -1;
 798         }
 799
 800 //      eDebug("STC: %08llx PTS: %08llx, diff %lld", now, pos, now - pos);
 801                 /* when we are less than 10 seconds before the start, return 0. */
 802                 /* (we're just waiting for the timespam to start) */
 803         if ((now < pos) && ((pos - now) < 90000 * 10))
 804         {
 805                 pos = 0;
 806                 return 0;
 807         }
 808
 809         if (now < pos) /* wrap around */
 810                 pos = now + ((pts_t)1)<<33 - pos;
 811         else
 812                 pos = now - pos;
 813
 814         return 0;
 815 }
 816
 817 RESULT eDVBChannel::seekTo(iDVBDemux *decoding_demux, int relative, pts_t &pts)
 818 {
 819         int bitrate = m_tstools.calcBitrate(); /* in bits/s */
 820
 821         if (bitrate == -1)
 822                 return -1;
 823
 824         if (relative)
 825         {
 826                 pts_t now;
 827                 if (getCurrentPosition(decoding_demux, now, 0))
 828                 {
 829                         eDebug("seekTo: getCurrentPosition failed!");
 830                         return -1;
 831                 }
 832                 pts += now;
 833         }
 834
 835         if (pts < 0)
 836                 pts = 0;
 837
 838         off_t offset = (pts * (pts_t)bitrate) / 8ULL / 90000ULL;
 839
 840         seekToPosition(decoding_demux, offset);
 841         return 0;
 842 }
 843
 844 RESULT eDVBChannel::seekToPosition(iDVBDemux *decoding_demux, const off_t &r)
 845 {
 846                         /* when seeking, we have to ensure that all buffers are flushed.
 847                            there are basically 3 buffers:
 848                            a.) the filepush's internal buffer
 849                            b.) the PVR buffer (before demux)
 850                            c.) the ratebuffer (after demux)
 851
 852                            it's important to clear them in the correct order, otherwise
 853                            the ratebuffer (for example) would immediately refill from
 854                            the not-yet-flushed PVR buffer.
 855                         */
 856         eDebug("eDVBChannel: seekToPosition .. %llx", r);
 857         m_pvr_thread->pause();
 858
 859                 /* flush internal filepush buffer */
 860         m_pvr_thread->flush();
 861
 862                 /* HACK: flush PVR buffer */
 863         ::ioctl(m_pvr_fd_dst, 0);
 864
 865                 /* flush ratebuffers (video, audio) */
 866         if (decoding_demux)
 867                 decoding_demux->flush();
 868
 869                 /* demux will also flush all decoder.. */
 870         m_pvr_thread->seek(SEEK_SET, r);
 871         m_pvr_thread->resume();
 872         return 0;
 873 }