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
 129         if (!m_PMT.getCurrent(ptr))
 130         {
 131                 eDVBTableSpec table_spec;
 132                 ptr->getSpec(table_spec);
 133                 program.pmtPid = table_spec.pid < 0x1fff ? table_spec.pid : -1;
 134                 std::vector<ProgramMapSection*>::const_iterator i;
 135                 for (i = ptr->getSections().begin(); i != ptr->getSections().end(); ++i)
 136                 {
 137                         const ProgramMapSection &pmt = **i;
 138                         program.pcrPid = pmt.getPcrPid();
 139
 140                         ElementaryStreamInfoConstIterator es;
 141                         for (es = pmt.getEsInfo()->begin(); es != pmt.getEsInfo()->end(); ++es)
 142                         {
 143                                 int isaudio = 0, isvideo = 0;
 144                                 videoStream video;
 145                                 audioStream audio;
 146                                 audio.component_tag=-1;
 147
 148                                 video.pid = (*es)->getPid();
 149                                 audio.pid = (*es)->getPid();
 150
 151                                 switch ((*es)->getType())
 152                                 {
 153                                 case 0x01: // MPEG 1 video
 154                                 case 0x02: // MPEG 2 video
 155                                         isvideo = 1;
 156                                         break;
 157                                 case 0x03: // MPEG 1 audio
 158                                 case 0x04: // MPEG 2 audio:
 159                                         isaudio = 1;
 160                                         audio.type = audioStream::atMPEG;
 161                                         break;
 162                                 case 0x06: // PES Private
 163                                                 /* PES private can contain AC-3, DTS or lots of other stuff.
 164                                                    check descriptors to get the exact type. */
 165                                         for (DescriptorConstIterator desc = (*es)->getDescriptors()->begin();
 166                                                         desc != (*es)->getDescriptors()->end(); ++desc)
 167                                         {
 168                                                 switch ((*desc)->getTag())
 169                                                 {
 170                                                 case AC3_DESCRIPTOR:
 171                                                         isaudio = 1;
 172                                                         audio.type = audioStream::atAC3;
 173                                                         break;
 174                                                 }
 175                                         }
 176                                         break;
 177                                 }
 178                                 if (isaudio)
 179                                 {
 180                                         for (DescriptorConstIterator desc = (*es)->getDescriptors()->begin();
 181                                                         desc != (*es)->getDescriptors()->end(); ++desc)
 182                                         {
 183                                                 switch ((*desc)->getTag())
 184                                                 {
 185                                                 case ISO_639_LANGUAGE_DESCRIPTOR:
 186                                                 {
 187                                                         const Iso639LanguageList *languages = ((Iso639LanguageDescriptor*)*desc)->getIso639Languages();
 188
 189                                                                 /* use last language code */
 190                                                         for (Iso639LanguageConstIterator i(languages->begin()); i != languages->end(); ++i)
 191                                                                 audio.language_code = (*i)->getIso639LanguageCode();
 192
 193                                                         break;
 194                                                 }
 195                                                 case STREAM_IDENTIFIER_DESCRIPTOR:
 196                                                         audio.component_tag = ((StreamIdentifierDescriptor*)*desc)->getComponentTag();
 197                                                         break;
 198                                                 }
 199                                         }
 200
 201                                         program.audioStreams.push_back(audio);
 202                                 }
 203                                 if (isvideo)
 204                                         program.videoStreams.push_back(video);
 205                         }
 206                 }
 207                 return 0;
 208         }
 209         else if ( m_service && !m_service->cacheEmpty() )
 210         {
 211                 int vpid = m_service->getCachePID(eDVBService::cVPID),
 212                         apid_ac3 = m_service->getCachePID(eDVBService::cAPID),
 213                         apid_mpeg = m_service->getCachePID(eDVBService::cAC3PID),
 214                         pcrpid = m_service->getCachePID(eDVBService::cPCRPID),
 215                         cnt=0;
 216                 if ( vpid != -1 )
 217                 {
 218                         videoStream s;
 219                         s.pid = vpid;
 220                         program.videoStreams.push_back(s);
 221                         ++cnt;
 222                 }
 223                 if ( apid_ac3 != -1 )
 224                 {
 225                         audioStream s;
 226                         s.type = audioStream::atAC3;
 227                         s.pid = apid_ac3;
 228                         program.audioStreams.push_back(s);
 229                         ++cnt;
 230                 }
 231                 if ( apid_mpeg != -1 )
 232                 {
 233                         audioStream s;
 234                         s.type = audioStream::atMPEG;
 235                         s.pid = apid_mpeg;
 236                         program.audioStreams.push_back(s);
 237                         ++cnt;
 238                 }
 239                 if ( pcrpid != -1 )
 240                 {
 241                         ++cnt;
 242                         program.pcrPid = pcrpid;
 243                 }
 244                 if ( cnt )
 245                         return 0;
 246         }
 247         return -1;
 248 }
 249
 250 int eDVBServicePMTHandler::getChannel(eUsePtr<iDVBChannel> &channel)
 251 {
 252         channel = m_channel;
 253         if (channel)
 254                 return 0;
 255         else
 256                 return -1;
 257 }
 258
 259 int eDVBServicePMTHandler::getDemux(ePtr<iDVBDemux> &demux)
 260 {
 261         demux = m_demux;
 262         if (demux)
 263                 return 0;
 264         else
 265                 return -1;
 266 }
 267
 268 int eDVBServicePMTHandler::getPVRChannel(ePtr<iDVBPVRChannel> &pvr_channel)
 269 {
 270         pvr_channel = m_pvr_channel;
 271         if (pvr_channel)
 272                 return 0;
 273         else
 274                 return -1;
 275 }
 276
 277 int eDVBServicePMTHandler::tune(eServiceReferenceDVB &ref)
 278 {
 279         RESULT res;
 280         m_reference = ref;
 281
 282                 /* is this a normal (non PVR) channel? */
 283         if (ref.path.empty())
 284         {
 285                 eDVBChannelID chid;
 286                 ref.getChannelID(chid);
 287                 res = m_resourceManager->allocateChannel(chid, m_channel);
 288                 eDebug("allocate Channel: res %d", res);
 289         } else
 290         {
 291                 eDVBMetaParser parser;
 292
 293                 if (parser.parseFile(ref.path))
 294                         eWarning("no .meta file found, trying original service ref.");
 295                 else
 296                         m_reference = parser.m_ref;
 297
 298                 eDebug("alloc PVR");
 299                         /* allocate PVR */
 300                 res = m_resourceManager->allocatePVRChannel(m_pvr_channel);
 301                 if (res)
 302                         eDebug("allocatePVRChannel failed!\n");
 303                 m_channel = m_pvr_channel;
 304         }
 305
 306         if (m_channel)
 307         {
 308                 m_channel->connectStateChange(
 309                         slot(*this, &eDVBServicePMTHandler::channelStateChanged),
 310                         m_channelStateChanged_connection);
 311                 m_last_channel_state = -1;
 312                 channelStateChanged(m_channel);
 313         } else
 314         {
 315                 serviceEvent(eventTuneFailed);
 316                 return res;
 317         }
 318
 319         if (m_pvr_channel)
 320                 m_pvr_channel->playFile(ref.path.c_str());
 321
 322         ePtr<iDVBChannelList> db;
 323         if (!m_resourceManager->getChannelList(db))
 324                 db->getService((eServiceReferenceDVB&)m_reference, m_service);
 325
 326         return res;
 327 }
 328
 329 std::map<eServiceReferenceDVB, eDVBCAService*> eDVBCAService::exist;
 330
 331 eDVBCAService::eDVBCAService()
 332         :m_prev_build_hash(0), m_sendstate(0), m_retryTimer(eApp)
 333 {
 334         memset(m_used_demux, 0xFF, sizeof(m_used_demux));
 335         CONNECT(m_retryTimer.timeout, eDVBCAService::sendCAPMT);
 336         Connect();
 337 }
 338
 339 eDVBCAService::~eDVBCAService()
 340 {
 341         eDebug("[eDVBCAService] free service %s", m_service.toString().c_str());
 342         ::close(m_sock);
 343 }
 344
 345 RESULT eDVBCAService::register_service( const eServiceReferenceDVB &ref, int demux_num, eDVBCAService *&caservice )
 346 {
 347         CAServiceMap::iterator it = exist.find(ref);
 348         if ( it != exist.end() )
 349                 caservice = it->second;
 350         else
 351         {
 352                 caservice = (exist[ref]=new eDVBCAService());
 353                 caservice->m_service = ref;
 354                 eDebug("[eDVBCAService] new service %s", ref.toString().c_str() );
 355         }
 356 // search free demux entry
 357         int iter=0, max_demux_slots = sizeof(caservice->m_used_demux);
 358
 359         while ( iter < max_demux_slots && caservice->m_used_demux[iter] != 0xFF )
 360                 ++iter;
 361
 362         if ( iter < max_demux_slots )
 363         {
 364                 caservice->m_used_demux[iter] = demux_num & 0xFF;
 365                 eDebug("[eDVBCAService] add demux %d to slot %d service %s", demux_num, iter, ref.toString().c_str());
 366         }
 367         else
 368         {
 369                 eDebug("[eDVBCAService] no more demux slots free for service %s!!", ref.toString().c_str());
 370                 return -1;
 371         }
 372         return 0;
 373 }
 374
 375 RESULT eDVBCAService::unregister_service( const eServiceReferenceDVB &ref, int demux_num, eTable<ProgramMapSection> *ptr )
 376 {
 377         CAServiceMap::iterator it = exist.find(ref);
 378         if ( it == exist.end() )
 379         {
 380                 eDebug("[eDVBCAService] try to unregister non registered %s", ref.toString().c_str());
 381                 return -1;
 382         }
 383         else
 384         {
 385                 eDVBCAService *caservice = it->second;
 386                 bool freed = false;
 387                 int iter = 0,
 388                         used_demux_slots = 0,
 389                         max_demux_slots = sizeof(caservice->m_used_demux)/sizeof(int);
 390                 while ( iter < max_demux_slots )
 391                 {
 392                         if ( caservice->m_used_demux[iter] != 0xFF )
 393                         {
 394                                 if ( !freed && caservice->m_used_demux[iter] == demux_num )
 395                                 {
 396                                         eDebug("[eDVBCAService] free slot %d demux %d for service %s", iter, caservice->m_used_demux[iter], caservice->m_service.toString().c_str() );
 397                                         caservice->m_used_demux[iter] = 0xFF;
 398                                         freed=true;
 399                                 }
 400                                 else
 401                                         ++used_demux_slots;
 402                         }
 403                         ++iter;
 404                 }
 405                 if (!freed)
 406                 {
 407                         eDebug("[eDVBCAService] couldn't free demux slot for demux %d", demux_num);
 408                         return -1;
 409                 }
 410                 if (!used_demux_slots)  // no more used.. so we remove it
 411                 {
 412                         delete it->second;
 413                         exist.erase(it);
 414                 }
 415                 else
 416                 {
 417                         if (ptr)
 418                                 it->second->buildCAPMT(ptr);
 419                         else
 420                                 eDebug("[eDVBCAService] can not send updated demux info");
 421                 }
 422         }
 423         return 0;
 424 }
 425
 426 void eDVBCAService::Connect()
 427 {
 428         memset(&m_servaddr, 0, sizeof(struct sockaddr_un));
 429         m_servaddr.sun_family = AF_UNIX;
 430         strcpy(m_servaddr.sun_path, "/tmp/camd.socket");
 431         m_clilen = sizeof(m_servaddr.sun_family) + strlen(m_servaddr.sun_path);
 432         m_sock = socket(PF_UNIX, SOCK_STREAM, 0);
 433         connect(m_sock, (struct sockaddr *) &m_servaddr, m_clilen);
 434         fcntl(m_sock, F_SETFL, O_NONBLOCK);
 435         int val=1;
 436         setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &val, 4);
 437 }
 438
 439 void eDVBCAService::buildCAPMT(eTable<ProgramMapSection> *ptr)
 440 {
 441         if (!ptr)
 442                 return;
 443
 444         eDVBTableSpec table_spec;
 445         ptr->getSpec(table_spec);
 446
 447         int pmtpid = table_spec.pid,
 448                 pmt_version = table_spec.version;
 449
 450         uint8_t demux_mask = 0;
 451         uint8_t first_demux_num = 0xFF;
 452
 453 #if 1
 454         int iter=0, max_demux_slots = sizeof(m_used_demux);
 455         while ( iter < max_demux_slots )
 456         {
 457                 if ( m_used_demux[iter] != 0xFF )
 458                 {
 459                         if ( first_demux_num == 0xFF )
 460                                 first_demux_num = m_used_demux[iter];
 461                         demux_mask |= (1 << m_used_demux[iter]);
 462                 }
 463                 ++iter;
 464         }
 465 #else
 466         demux_mask = 3;
 467         first_demux_num = 0;
 468 #endif
 469
 470         if ( first_demux_num == 0xFF )
 471         {
 472                 eDebug("[eDVBCAService] no demux found for service %s", m_service.toString().c_str() );
 473                 return;
 474         }
 475
 476         eDebug("demux %d mask %02x prevhash %08x", first_demux_num, demux_mask, m_prev_build_hash);
 477
 478         unsigned int build_hash = (pmtpid << 16);
 479         build_hash |= (demux_mask << 8);
 480         build_hash |= (pmt_version&0xFF);
 481
 482         if ( build_hash == m_prev_build_hash )
 483         {
 484                 eDebug("[eDVBCAService] don't build/send the same CA PMT twice");
 485                 return;
 486         }
 487
 488         std::vector<ProgramMapSection*>::const_iterator i=ptr->getSections().begin();
 489         if ( i != ptr->getSections().end() )
 490         {
 491                 CaProgramMapSection capmt(*i++, m_prev_build_hash ? 0x05 /*update*/ : 0x03 /*only*/, 0x01 );
 492
 493                 while( i != ptr->getSections().end() )
 494                 {
 495 //                      eDebug("append");
 496                         capmt.append(*i++);
 497                 }
 498
 499                 // add our private descriptors to capmt
 500                 uint8_t tmp[10];
 501
 502                 tmp[0]=0x84;  // pmt pid
 503                 tmp[1]=0x02;
 504                 tmp[2]=pmtpid>>8;
 505                 tmp[3]=pmtpid&0xFF;
 506                 capmt.injectDescriptor(tmp, false);
 507
 508                 tmp[0] = 0x82; // demux
 509                 tmp[1] = 0x02;
 510                 tmp[2] = demux_mask;    // descramble bitmask
 511                 tmp[3] = first_demux_num; // read section data from demux number
 512                 capmt.injectDescriptor(tmp, false);
 513
 514                 tmp[0] = 0x81; // dvbnamespace
 515                 tmp[1] = 0x08;
 516                 tmp[2] = m_service.getDVBNamespace().get()>>24;
 517                 tmp[3]=(m_service.getDVBNamespace().get()>>16)&0xFF;
 518                 tmp[4]=(m_service.getDVBNamespace().get()>>8)&0xFF;
 519                 tmp[5]=m_service.getDVBNamespace().get()&0xFF;
 520                 tmp[6]=m_service.getTransportStreamID().get()>>8;
 521                 tmp[7]=m_service.getTransportStreamID().get()&0xFF;
 522                 tmp[8]=m_service.getOriginalNetworkID().get()>>8;
 523                 tmp[9]=m_service.getOriginalNetworkID().get()&0xFF;
 524                 capmt.injectDescriptor(tmp, false);
 525
 526                 capmt.writeToBuffer(m_capmt);
 527         }
 528
 529         m_prev_build_hash = build_hash;
 530
 531         if ( m_sendstate != 0xFFFFFFFF )
 532                 m_sendstate=0;
 533         sendCAPMT();
 534 }
 535
 536 void eDVBCAService::sendCAPMT()
 537 {
 538         if ( m_sendstate && m_sendstate != 0xFFFFFFFF ) // broken pipe retry
 539         {
 540                 ::close(m_sock);
 541                 Connect();
 542         }
 543
 544         int wp=0;
 545         if ( m_capmt[3] & 0x80 )
 546         {
 547                 int i=0;
 548                 int lenbytes = m_capmt[3] & ~0x80;
 549                 while(i < lenbytes)
 550                         wp = (wp << 8) | m_capmt[4 + i++];
 551                 wp+=4;
 552                 wp+=lenbytes;
 553         }
 554         else
 555         {
 556                 wp = m_capmt[3];
 557                 wp+=4;
 558         }
 559
 560         if ( write(m_sock, m_capmt, wp) == wp )
 561         {
 562                 m_sendstate=0xFFFFFFFF;
 563                 eDebug("[eDVBCAService] send %d bytes",wp);
 564 #if 1
 565                 for(int i=0;i<wp;i++)
 566                         eDebugNoNewLine("%02x ", m_capmt[i]);
 567                 eDebug("");
 568 #endif
 569         }
 570         else
 571         {
 572                 switch(m_sendstate)
 573                 {
 574                         case 0xFFFFFFFF:
 575                                 ++m_sendstate;
 576                                 m_retryTimer.start(0,true);
 577 //                              eDebug("[eDVBCAService] send failed .. immediate retry");
 578                                 break;
 579                         default:
 580                                 m_retryTimer.start(5000,true);
 581 //                              eDebug("[eDVBCAService] send failed .. retry in 5 sec");
 582                                 break;
 583                 }
 584                 ++m_sendstate;
 585         }
 586 }