lib/dvb/pmt.cpp

   1 #include <lib/base/eerror.h>
   2 #include <lib/dvb/pmt.h>
   3 #include <lib/dvb/specs.h>
   4 #include <lib/dvb/dvb.h>
   5 #include <lib/dvb/metaparser.h>
   6 #include <lib/dvb_ci/dvbci.h>
   7 #include <dvbsi++/ca_program_map_section.h>
   8 #include <dvbsi++/descriptor_tag.h>
   9 #include <dvbsi++/iso639_language_descriptor.h>
  10 #include <dvbsi++/stream_identifier_descriptor.h>
  11
  12 eDVBServicePMTHandler::eDVBServicePMTHandler(int record)
  13         :m_ca_servicePtr(0)
  14 {
  15         m_record = record;
  16         eDVBResourceManager::getInstance(m_resourceManager);
  17         CONNECT(m_PMT.tableReady, eDVBServicePMTHandler::PMTready);
  18         CONNECT(m_PAT.tableReady, eDVBServicePMTHandler::PATready);
  19         eDebug("new PMT handler record: %d", m_record);
  20 }
  21
  22 eDVBServicePMTHandler::~eDVBServicePMTHandler()
  23 {
  24         eDebug("delete PMT handler record: %d", m_record);
  25         if (m_ca_servicePtr)
  26         {
  27                 eDebug("unregister caservice");
  28                 uint8_t demux_num;
  29                 m_demux->getCADemuxID(demux_num);
  30                 ePtr<eTable<ProgramMapSection> > ptr;
  31                 m_PMT.getCurrent(ptr);
  32                 eDVBCAService::unregister_service(m_reference, demux_num, ptr);
  33                 eDVBCIInterfaces::getInstance()->removePMTHandler(this);
  34         }
  35 }
  36
  37 void eDVBServicePMTHandler::channelStateChanged(iDVBChannel *channel)
  38 {
  39         int state;
  40         channel->getState(state);
  41
  42         if ((m_last_channel_state != iDVBChannel::state_ok)
  43                 && (state == iDVBChannel::state_ok) && (!m_demux))
  44         {
  45                 if (m_channel)
  46                         if (m_channel->getDemux(m_demux, m_record ? 0 : iDVBChannel::capDecode))
  47                                 eDebug("Allocating a demux for now tuned-in channel failed.");
  48
  49                 serviceEvent(eventTuned);
  50
  51                 if (m_demux)
  52                 {
  53                         eDebug("ok ... now we start!!");
  54
  55                         m_PAT.begin(eApp, eDVBPATSpec(), m_demux);
  56
  57                         if ( m_service && !m_service->cacheEmpty() )
  58                                 serviceEvent(eventNewProgramInfo);
  59                 }
  60         } else if ((m_last_channel_state != iDVBChannel::state_failed) &&
  61                         (state == iDVBChannel::state_failed))
  62         {
  63                 eDebug("tune failed.");
  64                 serviceEvent(eventTuneFailed);
  65         }
  66 }
  67
  68 void eDVBServicePMTHandler::PMTready(int error)
  69 {
  70         if (error)
  71                 serviceEvent(eventNoPMT);
  72         else
  73         {
  74                 serviceEvent(eventNewProgramInfo);
  75                 if (!m_pvr_channel)
  76                 {
  77                         if(!m_ca_servicePtr)   // don't send campmt to camd.socket for playbacked services
  78                         {
  79                                 uint8_t demux_num;
  80                                 m_demux->getCADemuxID(demux_num);
  81                                 eDVBCAService::register_service(m_reference, demux_num, m_ca_servicePtr);
  82                                 eDVBCIInterfaces::getInstance()->addPMTHandler(this);
  83                         }
  84                         eDVBCIInterfaces::getInstance()->gotPMT(this);
  85                 }
  86                 if (m_ca_servicePtr)
  87                 {
  88                         ePtr<eTable<ProgramMapSection> > ptr;
  89                         if (!m_PMT.getCurrent(ptr))
  90                                 m_ca_servicePtr->buildCAPMT(ptr);
  91                         else
  92                                 eDebug("eDVBServicePMTHandler cannot call buildCAPMT");
  93                 }
  94         }
  95 }
  96
  97 void eDVBServicePMTHandler::PATready(int)
  98 {
  99         eDebug("got PAT");
 100         ePtr<eTable<ProgramAssociationSection> > ptr;
 101         if (!m_PAT.getCurrent(ptr))
 102         {
 103                 int pmtpid = -1;
 104                 std::vector<ProgramAssociationSection*>::const_iterator i;
 105                 for (i = ptr->getSections().begin(); i != ptr->getSections().end(); ++i)
 106                 {
 107                         const ProgramAssociationSection &pat = **i;
 108                         ProgramAssociationConstIterator program;
 109                         for (program = pat.getPrograms()->begin(); program != pat.getPrograms()->end(); ++program)
 110                                 if (eServiceID((*program)->getProgramNumber()) == m_reference.getServiceID())
 111                                         pmtpid = (*program)->getProgramMapPid();
 112                 }
 113                 if (pmtpid == -1)
 114                         serviceEvent(eventNoPATEntry);
 115                 else
 116                         m_PMT.begin(eApp, eDVBPMTSpec(pmtpid, m_reference.getServiceID().get()), m_demux);
 117         } else
 118                 serviceEvent(eventNoPAT);
 119 }
 120
 121 int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 122 {
 123         ePtr<eTable<ProgramMapSection> > ptr;
 124
 125         program.videoStreams.clear();
 126         program.audioStreams.clear();
 127         program.pcrPid = -1;
 128         program.isCrypted = false;
 129
 130         if (!m_PMT.getCurrent(ptr))
 131         {
 132                 eDVBTableSpec table_spec;
 133                 ptr->getSpec(table_spec);
 134                 program.pmtPid = table_spec.pid < 0x1fff ? table_spec.pid : -1;
 135                 std::vector<ProgramMapSection*>::const_iterator i;
 136                 for (i = ptr->getSections().begin(); i != ptr->getSections().end(); ++i)
 137                 {
 138                         const ProgramMapSection &pmt = **i;
 139                         program.pcrPid = pmt.getPcrPid();
 140
 141                         ElementaryStreamInfoConstIterator es;
 142                         for (es = pmt.getEsInfo()->begin(); es != pmt.getEsInfo()->end(); ++es)
 143                         {
 144                                 int isaudio = 0, isvideo = 0, cadescriptors = 0;
 145                                 videoStream video;
 146                                 audioStream audio;
 147                                 audio.component_tag=-1;
 148                                 video.component_tag=-1;
 149
 150                                 video.pid = (*es)->getPid();
 151                                 audio.pid = (*es)->getPid();
 152
 153                                 switch ((*es)->getType())
 154                                 {
 155                                 case 0x01: // MPEG 1 video
 156                                 case 0x02: // MPEG 2 video
 157                                         isvideo = 1;
 158                                         //break; fall through !!!
 159                                 case 0x03: // MPEG 1 audio
 160                                 case 0x04: // MPEG 2 audio:
 161                                         if (!isvideo)
 162                                         {
 163                                                 isaudio = 1;
 164                                                 audio.type = audioStream::atMPEG;
 165                                         }
 166                                         //break; fall through !!!
 167                                 case 0x06: // PES Private
 168                                                 /* PES private can contain AC-3, DTS or lots of other stuff.
 169                                                    check descriptors to get the exact type. */
 170                                         for (DescriptorConstIterator desc = (*es)->getDescriptors()->begin();
 171                                                         desc != (*es)->getDescriptors()->end(); ++desc)
 172                                         {
 173                                                 switch ((*desc)->getTag())
 174                                                 {
 175                                                 case AC3_DESCRIPTOR:
 176                                                         if (!isvideo)
 177                                                         {
 178                                                                 isaudio = 1;
 179                                                                 audio.type = audioStream::atAC3;
 180                                                         }
 181                                                         break;
 182                                                 case ISO_639_LANGUAGE_DESCRIPTOR:
 183                                                         if (!isvideo)
 184                                                         {
 185                                                                 const Iso639LanguageList *languages = ((Iso639LanguageDescriptor*)*desc)->getIso639Languages();
 186                                                                         /* use last language code */
 187                                                                 for (Iso639LanguageConstIterator i(languages->begin()); i != languages->end(); ++i)
 188                                                                         audio.language_code = (*i)->getIso639LanguageCode();
 189                                                         }
 190                                                         break;
 191                                                 case STREAM_IDENTIFIER_DESCRIPTOR:
 192                                                         audio.component_tag =
 193                                                                 video.component_tag =
 194                                                                         ((StreamIdentifierDescriptor*)*desc)->getComponentTag();
 195                                                         break;
 196                                                 case CA_DESCRIPTOR:
 197                                                         ++cadescriptors;
 198                                                         break;
 199                                                 }
 200                                         }
 201                                         break;
 202                                 }
 203                                 if (isaudio)
 204                                         program.audioStreams.push_back(audio);
 205                                 else if (isvideo)
 206                                         program.videoStreams.push_back(video);
 207                                 else
 208                                         continue;
 209                                 if ( cadescriptors > 0 )
 210                                         program.isCrypted=true;
 211                         }
 212                         if ( !program.isCrypted )
 213                         {
 214                                 for (DescriptorConstIterator desc = pmt.getDescriptors()->begin();
 215                                         desc != pmt.getDescriptors()->end(); ++desc)
 216                                 {
 217                                         switch ((*desc)->getTag())
 218                                         {
 219                                         case CA_DESCRIPTOR:
 220                                                 program.isCrypted=true;
 221                                                 break;
 222                                         }
 223                                 }
 224                                 break;
 225                         }
 226                 }
 227                 return 0;
 228         }
 229         else if ( m_service && !m_service->cacheEmpty() )
 230         {
 231                 int vpid = m_service->getCachePID(eDVBService::cVPID),
 232                         apid_ac3 = m_service->getCachePID(eDVBService::cAC3PID),
 233                         apid_mpeg = m_service->getCachePID(eDVBService::cAPID),
 234                         pcrpid = m_service->getCachePID(eDVBService::cPCRPID),
 235                         cnt=0;
 236                 if ( vpid != -1 )
 237                 {
 238                         videoStream s;
 239                         s.pid = vpid;
 240                         program.videoStreams.push_back(s);
 241                         ++cnt;
 242                 }
 243                 if ( apid_ac3 != -1 )
 244                 {
 245                         audioStream s;
 246                         s.type = audioStream::atAC3;
 247                         s.pid = apid_ac3;
 248                         program.audioStreams.push_back(s);
 249                         ++cnt;
 250                 }
 251                 if ( apid_mpeg != -1 )
 252                 {
 253                         audioStream s;
 254                         s.type = audioStream::atMPEG;
 255                         s.pid = apid_mpeg;
 256                         program.audioStreams.push_back(s);
 257                         ++cnt;
 258                 }
 259                 if ( pcrpid != -1 )
 260                 {
 261                         ++cnt;
 262                         program.pcrPid = pcrpid;
 263                 }
 264                 if ( cnt )
 265                         return 0;
 266         }
 267         return -1;
 268 }
 269
 270 int eDVBServicePMTHandler::getChannel(eUsePtr<iDVBChannel> &channel)
 271 {
 272         channel = m_channel;
 273         if (channel)
 274                 return 0;
 275         else
 276                 return -1;
 277 }
 278
 279 int eDVBServicePMTHandler::getDemux(ePtr<iDVBDemux> &demux)
 280 {
 281         demux = m_demux;
 282         if (demux)
 283                 return 0;
 284         else
 285                 return -1;
 286 }
 287
 288 int eDVBServicePMTHandler::getPVRChannel(ePtr<iDVBPVRChannel> &pvr_channel)
 289 {
 290         pvr_channel = m_pvr_channel;
 291         if (pvr_channel)
 292                 return 0;
 293         else
 294                 return -1;
 295 }
 296
 297 int eDVBServicePMTHandler::tune(eServiceReferenceDVB &ref)
 298 {
 299         RESULT res;
 300         m_reference = ref;
 301
 302                 /* is this a normal (non PVR) channel? */
 303         if (ref.path.empty())
 304         {
 305                 eDVBChannelID chid;
 306                 ref.getChannelID(chid);
 307                 res = m_resourceManager->allocateChannel(chid, m_channel);
 308                 eDebug("allocate Channel: res %d", res);
 309         } else
 310         {
 311                 eDVBMetaParser parser;
 312
 313                 if (parser.parseFile(ref.path))
 314                         eWarning("no .meta file found, trying original service ref.");
 315                 else
 316                         m_reference = parser.m_ref;
 317
 318                 eDebug("alloc PVR");
 319                         /* allocate PVR */
 320                 res = m_resourceManager->allocatePVRChannel(m_pvr_channel);
 321                 if (res)
 322                         eDebug("allocatePVRChannel failed!\n");
 323                 m_channel = m_pvr_channel;
 324         }
 325
 326         if (m_channel)
 327         {
 328                 m_channel->connectStateChange(
 329                         slot(*this, &eDVBServicePMTHandler::channelStateChanged),
 330                         m_channelStateChanged_connection);
 331                 m_last_channel_state = -1;
 332                 channelStateChanged(m_channel);
 333         } else
 334         {
 335                 serviceEvent(eventTuneFailed);
 336                 return res;
 337         }
 338
 339         if (m_pvr_channel)
 340                 m_pvr_channel->playFile(ref.path.c_str());
 341
 342         ePtr<iDVBChannelList> db;
 343         if (!m_resourceManager->getChannelList(db))
 344                 db->getService((eServiceReferenceDVB&)m_reference, m_service);
 345
 346         return res;
 347 }
 348
 349 std::map<eServiceReferenceDVB, eDVBCAService*> eDVBCAService::exist;
 350
 351 eDVBCAService::eDVBCAService()
 352         :m_prev_build_hash(0), m_sendstate(0), m_retryTimer(eApp)
 353 {
 354         memset(m_used_demux, 0xFF, sizeof(m_used_demux));
 355         CONNECT(m_retryTimer.timeout, eDVBCAService::sendCAPMT);
 356         Connect();
 357 }
 358
 359 eDVBCAService::~eDVBCAService()
 360 {
 361         eDebug("[eDVBCAService] free service %s", m_service.toString().c_str());
 362         ::close(m_sock);
 363 }
 364
 365 RESULT eDVBCAService::register_service( const eServiceReferenceDVB &ref, int demux_num, eDVBCAService *&caservice )
 366 {
 367         CAServiceMap::iterator it = exist.find(ref);
 368         if ( it != exist.end() )
 369                 caservice = it->second;
 370         else
 371         {
 372                 caservice = (exist[ref]=new eDVBCAService());
 373                 caservice->m_service = ref;
 374                 eDebug("[eDVBCAService] new service %s", ref.toString().c_str() );
 375         }
 376 // search free demux entry
 377         int iter=0, max_demux_slots = sizeof(caservice->m_used_demux);
 378
 379         while ( iter < max_demux_slots && caservice->m_used_demux[iter] != 0xFF )
 380                 ++iter;
 381
 382         if ( iter < max_demux_slots )
 383         {
 384                 caservice->m_used_demux[iter] = demux_num & 0xFF;
 385                 eDebug("[eDVBCAService] add demux %d to slot %d service %s", demux_num, iter, ref.toString().c_str());
 386         }
 387         else
 388         {
 389                 eDebug("[eDVBCAService] no more demux slots free for service %s!!", ref.toString().c_str());
 390                 return -1;
 391         }
 392         return 0;
 393 }
 394
 395 RESULT eDVBCAService::unregister_service( const eServiceReferenceDVB &ref, int demux_num, eTable<ProgramMapSection> *ptr )
 396 {
 397         CAServiceMap::iterator it = exist.find(ref);
 398         if ( it == exist.end() )
 399         {
 400                 eDebug("[eDVBCAService] try to unregister non registered %s", ref.toString().c_str());
 401                 return -1;
 402         }
 403         else
 404         {
 405                 eDVBCAService *caservice = it->second;
 406                 bool freed = false;
 407                 int iter = 0,
 408                         used_demux_slots = 0,
 409                         max_demux_slots = sizeof(caservice->m_used_demux)/sizeof(int);
 410                 while ( iter < max_demux_slots )
 411                 {
 412                         if ( caservice->m_used_demux[iter] != 0xFF )
 413                         {
 414                                 if ( !freed && caservice->m_used_demux[iter] == demux_num )
 415                                 {
 416                                         eDebug("[eDVBCAService] free slot %d demux %d for service %s", iter, caservice->m_used_demux[iter], caservice->m_service.toString().c_str() );
 417                                         caservice->m_used_demux[iter] = 0xFF;
 418                                         freed=true;
 419                                 }
 420                                 else
 421                                         ++used_demux_slots;
 422                         }
 423                         ++iter;
 424                 }
 425                 if (!freed)
 426                 {
 427                         eDebug("[eDVBCAService] couldn't free demux slot for demux %d", demux_num);
 428                         return -1;
 429                 }
 430                 if (!used_demux_slots)  // no more used.. so we remove it
 431                 {
 432                         delete it->second;
 433                         exist.erase(it);
 434                 }
 435                 else
 436                 {
 437                         if (ptr)
 438                                 it->second->buildCAPMT(ptr);
 439                         else
 440                                 eDebug("[eDVBCAService] can not send updated demux info");
 441                 }
 442         }
 443         return 0;
 444 }
 445
 446 void eDVBCAService::Connect()
 447 {
 448         memset(&m_servaddr, 0, sizeof(struct sockaddr_un));
 449         m_servaddr.sun_family = AF_UNIX;
 450         strcpy(m_servaddr.sun_path, "/tmp/camd.socket");
 451         m_clilen = sizeof(m_servaddr.sun_family) + strlen(m_servaddr.sun_path);
 452         m_sock = socket(PF_UNIX, SOCK_STREAM, 0);
 453         connect(m_sock, (struct sockaddr *) &m_servaddr, m_clilen);
 454         fcntl(m_sock, F_SETFL, O_NONBLOCK);
 455         int val=1;
 456         setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &val, 4);
 457 }
 458
 459 void eDVBCAService::buildCAPMT(eTable<ProgramMapSection> *ptr)
 460 {
 461         if (!ptr)
 462                 return;
 463
 464         eDVBTableSpec table_spec;
 465         ptr->getSpec(table_spec);
 466
 467         int pmtpid = table_spec.pid,
 468                 pmt_version = table_spec.version;
 469
 470         uint8_t demux_mask = 0;
 471         uint8_t first_demux_num = 0xFF;
 472
 473 #if 1
 474         int iter=0, max_demux_slots = sizeof(m_used_demux);
 475         while ( iter < max_demux_slots )
 476         {
 477                 if ( m_used_demux[iter] != 0xFF )
 478                 {
 479                         if ( first_demux_num == 0xFF )
 480                                 first_demux_num = m_used_demux[iter];
 481                         demux_mask |= (1 << m_used_demux[iter]);
 482                 }
 483                 ++iter;
 484         }
 485 #else
 486         demux_mask = 3;
 487         first_demux_num = 0;
 488 #endif
 489
 490         if ( first_demux_num == 0xFF )
 491         {
 492                 eDebug("[eDVBCAService] no demux found for service %s", m_service.toString().c_str() );
 493                 return;
 494         }
 495
 496         eDebug("demux %d mask %02x prevhash %08x", first_demux_num, demux_mask, m_prev_build_hash);
 497
 498         unsigned int build_hash = (pmtpid << 16);
 499         build_hash |= (demux_mask << 8);
 500         build_hash |= (pmt_version&0xFF);
 501
 502         if ( build_hash == m_prev_build_hash )
 503         {
 504                 eDebug("[eDVBCAService] don't build/send the same CA PMT twice");
 505                 return;
 506         }
 507
 508         std::vector<ProgramMapSection*>::const_iterator i=ptr->getSections().begin();
 509         if ( i != ptr->getSections().end() )
 510         {
 511                 CaProgramMapSection capmt(*i++, m_prev_build_hash ? 0x05 /*update*/ : 0x03 /*only*/, 0x01 );
 512
 513                 while( i != ptr->getSections().end() )
 514                 {
 515 //                      eDebug("append");
 516                         capmt.append(*i++);
 517                 }
 518
 519                 // add our private descriptors to capmt
 520                 uint8_t tmp[10];
 521
 522                 tmp[0]=0x84;  // pmt pid
 523                 tmp[1]=0x02;
 524                 tmp[2]=pmtpid>>8;
 525                 tmp[3]=pmtpid&0xFF;
 526                 capmt.injectDescriptor(tmp, false);
 527
 528                 tmp[0] = 0x82; // demux
 529                 tmp[1] = 0x02;
 530                 tmp[2] = demux_mask;    // descramble bitmask
 531                 tmp[3] = first_demux_num; // read section data from demux number
 532                 capmt.injectDescriptor(tmp, false);
 533
 534                 tmp[0] = 0x81; // dvbnamespace
 535                 tmp[1] = 0x08;
 536                 tmp[2] = m_service.getDVBNamespace().get()>>24;
 537                 tmp[3]=(m_service.getDVBNamespace().get()>>16)&0xFF;
 538                 tmp[4]=(m_service.getDVBNamespace().get()>>8)&0xFF;
 539                 tmp[5]=m_service.getDVBNamespace().get()&0xFF;
 540                 tmp[6]=m_service.getTransportStreamID().get()>>8;
 541                 tmp[7]=m_service.getTransportStreamID().get()&0xFF;
 542                 tmp[8]=m_service.getOriginalNetworkID().get()>>8;
 543                 tmp[9]=m_service.getOriginalNetworkID().get()&0xFF;
 544                 capmt.injectDescriptor(tmp, false);
 545
 546                 capmt.writeToBuffer(m_capmt);
 547         }
 548
 549         m_prev_build_hash = build_hash;
 550
 551         if ( m_sendstate != 0xFFFFFFFF )
 552                 m_sendstate=0;
 553         sendCAPMT();
 554 }
 555
 556 void eDVBCAService::sendCAPMT()
 557 {
 558         if ( m_sendstate && m_sendstate != 0xFFFFFFFF ) // broken pipe retry
 559         {
 560                 ::close(m_sock);
 561                 Connect();
 562         }
 563
 564         int wp=0;
 565         if ( m_capmt[3] & 0x80 )
 566         {
 567                 int i=0;
 568                 int lenbytes = m_capmt[3] & ~0x80;
 569                 while(i < lenbytes)
 570                         wp = (wp << 8) | m_capmt[4 + i++];
 571                 wp+=4;
 572                 wp+=lenbytes;
 573         }
 574         else
 575         {
 576                 wp = m_capmt[3];
 577                 wp+=4;
 578         }
 579
 580         if ( write(m_sock, m_capmt, wp) == wp )
 581         {
 582                 m_sendstate=0xFFFFFFFF;
 583                 eDebug("[eDVBCAService] send %d bytes",wp);
 584 #if 1
 585                 for(int i=0;i<wp;i++)
 586                         eDebugNoNewLine("%02x ", m_capmt[i]);
 587                 eDebug("");
 588 #endif
 589         }
 590         else
 591         {
 592                 switch(m_sendstate)
 593                 {
 594                         case 0xFFFFFFFF:
 595                                 ++m_sendstate;
 596                                 m_retryTimer.start(0,true);
 597 //                              eDebug("[eDVBCAService] send failed .. immediate retry");
 598                                 break;
 599                         default:
 600                                 m_retryTimer.start(5000,true);
 601 //                              eDebug("[eDVBCAService] send failed .. retry in 5 sec");
 602                                 break;
 603                 }
 604                 ++m_sendstate;
 605         }
 606 }