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                 eDVBChannel *channel = (eDVBChannel*) &(*m_cached_channel);
 497                 if (channel->getUseCount() == 1)
 498                 {
 499                         ePtr<iDVBFrontend> fe;
 500                         if (!channel->getFrontend(fe))
 501                         {
 502                                 for (eSmartPtrList<eDVBRegisteredFrontend>::iterator ii(m_frontend.begin()); ii != m_frontend.end(); ++ii)
 503                                 {
 504                                         if ( &(*fe) == &(*ii->m_frontend) )
 505                                         {
 506                                                 --ii->m_inuse;
 507                                                 decremented_cached_channel_fe_usecount = &ii->m_inuse;
 508                                                 break;
 509                                         }
 510                                 }
 511                         }
 512                 }
 513         }
 514         else
 515                 decremented_cached_channel_fe_usecount=NULL;
 516
 517         ePtr<iDVBFrontendParameters> feparm;
 518
 519         if (!m_list)
 520         {
 521                 eDebug("no channel list set!");
 522                 ret = false;
 523                 goto error;
 524         }
 525
 526         if (m_list->getChannelFrontendData(channelid, feparm))
 527         {
 528                 eDebug("channel not found!");
 529                 ret = false;
 530                 goto error;
 531         }
 532
 533         ret = canAllocateFrontend(feparm);
 534
 535 error:
 536         if (decremented_fe_usecount)
 537                 ++(*decremented_fe_usecount);
 538         if (decremented_cached_channel_fe_usecount)
 539                 ++(*decremented_cached_channel_fe_usecount);
 540
 541         return ret;
 542 }
 543
 544 DEFINE_REF(eDVBChannel);
 545
 546 eDVBChannel::eDVBChannel(eDVBResourceManager *mgr, eDVBAllocatedFrontend *frontend): m_state(state_idle), m_mgr(mgr)
 547 {
 548         m_frontend = frontend;
 549
 550         m_pvr_thread = 0;
 551
 552         if (m_frontend)
 553                 m_frontend->get().connectStateChange(slot(*this, &eDVBChannel::frontendStateChanged), m_conn_frontendStateChanged);
 554 }
 555
 556 eDVBChannel::~eDVBChannel()
 557 {
 558         if (m_channel_id)
 559                 m_mgr->removeChannel(this);
 560
 561         if (m_pvr_thread)
 562         {
 563                 m_pvr_thread->stop();
 564                 ::close(m_pvr_fd_src);
 565                 ::close(m_pvr_fd_dst);
 566                 delete m_pvr_thread;
 567         }
 568 }
 569
 570 void eDVBChannel::frontendStateChanged(iDVBFrontend*fe)
 571 {
 572         int state, ourstate = 0;
 573
 574                 /* if we are already in shutdown, don't change state. */
 575         if (m_state == state_release)
 576                 return;
 577
 578         if (fe->getState(state))
 579                 return;
 580
 581         if (state == iDVBFrontend::stateLock)
 582         {
 583                 eDebug("OURSTATE: ok");
 584                 ourstate = state_ok;
 585         } else if (state == iDVBFrontend::stateTuning)
 586         {
 587                 eDebug("OURSTATE: tuning");
 588                 ourstate = state_tuning;
 589         } else if (state == iDVBFrontend::stateLostLock)
 590         {
 591                 eDebug("OURSTATE: lost lock");
 592                 ourstate = state_unavailable;
 593         } else if (state == iDVBFrontend::stateFailed)
 594         {
 595                 eDebug("OURSTATE: failed");
 596                 ourstate = state_failed;
 597         } else
 598                 eFatal("state unknown");
 599
 600         if (ourstate != m_state)
 601         {
 602                 m_state = ourstate;
 603                 m_stateChanged(this);
 604         }
 605 }
 606
 607 void eDVBChannel::AddUse()
 608 {
 609         ++m_use_count;
 610 }
 611
 612 void eDVBChannel::ReleaseUse()
 613 {
 614         if (!--m_use_count)
 615         {
 616                 m_state = state_release;
 617                 m_stateChanged(this);
 618         }
 619 }
 620
 621 RESULT eDVBChannel::setChannel(const eDVBChannelID &channelid, ePtr<iDVBFrontendParameters> &feparm)
 622 {
 623         if (m_channel_id)
 624                 m_mgr->removeChannel(this);
 625
 626         if (!channelid)
 627                 return 0;
 628
 629         if (!m_frontend)
 630         {
 631                 eDebug("no frontend to tune!");
 632                 return -ENODEV;
 633         }
 634
 635         m_channel_id = channelid;
 636         m_mgr->addChannel(channelid, this);
 637         m_state = state_tuning;
 638                         /* if tuning fails, shutdown the channel immediately. */
 639         int res;
 640         res = m_frontend->get().tune(*feparm);
 641
 642         if (res)
 643         {
 644                 m_state = state_release;
 645                 m_stateChanged(this);
 646                 return res;
 647         }
 648
 649         return 0;
 650 }
 651
 652 RESULT eDVBChannel::connectStateChange(const Slot1<void,iDVBChannel*> &stateChange, ePtr<eConnection> &connection)
 653 {
 654         connection = new eConnection((iDVBChannel*)this, m_stateChanged.connect(stateChange));
 655         return 0;
 656 }
 657
 658 RESULT eDVBChannel::getState(int &state)
 659 {
 660         state = m_state;
 661         return 0;
 662 }
 663
 664 RESULT eDVBChannel::setCIRouting(const eDVBCIRouting &routing)
 665 {
 666         return -1;
 667 }
 668
 669 RESULT eDVBChannel::getDemux(ePtr<iDVBDemux> &demux, int cap)
 670 {
 671         eDebug("get %d demux", cap);
 672         ePtr<eDVBAllocatedDemux> &our_demux = (cap & capDecode) ? m_decoder_demux : m_demux;
 673
 674         if (!our_demux)
 675         {
 676                 demux = 0;
 677
 678                 if (m_mgr->allocateDemux(m_frontend ? (eDVBRegisteredFrontend*)*m_frontend : (eDVBRegisteredFrontend*)0, our_demux, cap))
 679                         return -1;
 680
 681         }
 682
 683         demux = *our_demux;
 684         if (cap & capDecode)
 685         {
 686                 our_demux = 0;
 687         }
 688         return 0;
 689 }
 690
 691 RESULT eDVBChannel::getFrontend(ePtr<iDVBFrontend> &frontend)
 692 {
 693         frontend = &m_frontend->get();
 694         if (frontend)
 695                 return 0;
 696         else
 697                 return -ENODEV;
 698 }
 699
 700 RESULT eDVBChannel::playFile(const char *file)
 701 {
 702         ASSERT(!m_frontend);
 703         if (m_pvr_thread)
 704         {
 705                 m_pvr_thread->stop();
 706                 delete m_pvr_thread;
 707                 m_pvr_thread = 0;
 708         }
 709
 710         m_tstools.openFile(file);
 711
 712                 /* DON'T EVEN THINK ABOUT FIXING THIS. FIX THE ATI SOURCES FIRST,
 713                    THEN DO A REAL FIX HERE! */
 714
 715                 /* (this codepath needs to be improved anyway.) */
 716         m_pvr_fd_dst = open("/dev/misc/pvr", O_WRONLY);
 717         if (m_pvr_fd_dst < 0)
 718         {
 719                 eDebug("can't open /dev/misc/pvr - you need to buy the new(!) $$$ box! (%m)"); // or wait for the driver to be improved.
 720                 return -ENODEV;
 721         }
 722
 723         m_pvr_fd_src = open(file, O_RDONLY|O_LARGEFILE);
 724         if (m_pvr_fd_src < 0)
 725         {
 726                 eDebug("can't open PVR m_pvr_fd_src file %s (%m)", file);
 727                 close(m_pvr_fd_dst);
 728                 return -ENOENT;
 729         }
 730
 731         m_state = state_ok;
 732         m_stateChanged(this);
 733
 734         m_pvr_thread = new eFilePushThread();
 735         m_pvr_thread->start(m_pvr_fd_src, m_pvr_fd_dst);
 736
 737         return 0;
 738 }
 739
 740 RESULT eDVBChannel::getLength(pts_t &len)
 741 {
 742         return m_tstools.calcLen(len);
 743 }
 744
 745 RESULT eDVBChannel::getCurrentPosition(iDVBDemux *decoding_demux, pts_t &pos, int mode)
 746 {
 747         if (!decoding_demux)
 748                 return -1;
 749
 750         off_t begin = 0;
 751                 /* getPTS for offset 0 is cached, so it doesn't harm. */
 752         int r = m_tstools.getPTS(begin, pos);
 753         if (r)
 754         {
 755                 eDebug("tstools getpts(0) failed!");
 756                 return r;
 757         }
 758
 759         pts_t now;
 760
 761                         /* TODO: this is a gross hack. */
 762         r = decoding_demux->getSTC(now, mode ? 128 : 0);
 763
 764         if (r)
 765         {
 766                 eDebug("demux getSTC failed");
 767                 return -1;
 768         }
 769
 770 //      eDebug("STC: %08llx PTS: %08llx, diff %lld", now, pos, now - pos);
 771                 /* when we are less than 10 seconds before the start, return 0. */
 772                 /* (we're just waiting for the timespam to start) */
 773         if ((now < pos) && ((pos - now) < 90000 * 10))
 774         {
 775                 pos = 0;
 776                 return 0;
 777         }
 778
 779         if (now < pos) /* wrap around */
 780                 pos = now + ((pts_t)1)<<33 - pos;
 781         else
 782                 pos = now - pos;
 783
 784         return 0;
 785 }
 786
 787 RESULT eDVBChannel::seekTo(iDVBDemux *decoding_demux, int relative, pts_t &pts)
 788 {
 789         int bitrate = m_tstools.calcBitrate(); /* in bits/s */
 790
 791         if (bitrate == -1)
 792                 return -1;
 793
 794         if (relative)
 795         {
 796                 pts_t now;
 797                 if (getCurrentPosition(decoding_demux, now, 0))
 798                 {
 799                         eDebug("seekTo: getCurrentPosition failed!");
 800                         return -1;
 801                 }
 802                 pts += now;
 803         }
 804
 805         if (pts < 0)
 806                 pts = 0;
 807
 808         off_t offset = (pts * (pts_t)bitrate) / 8ULL / 90000ULL;
 809
 810         seekToPosition(decoding_demux, offset);
 811         return 0;
 812 }
 813
 814 RESULT eDVBChannel::seekToPosition(iDVBDemux *decoding_demux, const off_t &r)
 815 {
 816                         /* when seeking, we have to ensure that all buffers are flushed.
 817                            there are basically 3 buffers:
 818                            a.) the filepush's internal buffer
 819                            b.) the PVR buffer (before demux)
 820                            c.) the ratebuffer (after demux)
 821
 822                            it's important to clear them in the correct order, otherwise
 823                            the ratebuffer (for example) would immediately refill from
 824                            the not-yet-flushed PVR buffer.
 825                         */
 826         eDebug("eDVBChannel: seekToPosition .. %llx", r);
 827         m_pvr_thread->pause();
 828
 829                 /* flush internal filepush buffer */
 830         m_pvr_thread->flush();
 831
 832                 /* HACK: flush PVR buffer */
 833         ::ioctl(m_pvr_fd_dst, 0);
 834
 835                 /* flush ratebuffers (video, audio) */
 836         if (decoding_demux)
 837                 decoding_demux->flush();
 838
 839                 /* demux will also flush all decoder.. */
 840         m_pvr_thread->seek(SEEK_SET, r);
 841         m_pvr_thread->resume();
 842         return 0;
 843 }