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 <lib/dvb/epgcache.h>
   8 #include <dvbsi++/ca_program_map_section.h>
   9 #include <dvbsi++/descriptor_tag.h>
  10 #include <dvbsi++/iso639_language_descriptor.h>
  11 #include <dvbsi++/stream_identifier_descriptor.h>
  12
  13 eDVBServicePMTHandler::eDVBServicePMTHandler(int record)
  14         :m_ca_servicePtr(0)
  15 {
  16         m_record = record;
  17         eDVBResourceManager::getInstance(m_resourceManager);
  18         CONNECT(m_PMT.tableReady, eDVBServicePMTHandler::PMTready);
  19         CONNECT(m_PAT.tableReady, eDVBServicePMTHandler::PATready);
  20         eDebug("new PMT handler record: %d", m_record);
  21 }
  22
  23 eDVBServicePMTHandler::~eDVBServicePMTHandler()
  24 {
  25         eDebug("delete PMT handler record: %d", m_record);
  26         if (m_ca_servicePtr)
  27         {
  28                 eDebug("unregister caservice");
  29                 uint8_t demux_num;
  30                 m_demux->getCADemuxID(demux_num);
  31                 ePtr<eTable<ProgramMapSection> > ptr;
  32                 m_PMT.getCurrent(ptr);
  33                 eDVBCAService::unregister_service(m_reference, demux_num, ptr);
  34                 eDVBCIInterfaces::getInstance()->removePMTHandler(this);
  35         }
  36 }
  37
  38 void eDVBServicePMTHandler::channelStateChanged(iDVBChannel *channel)
  39 {
  40         int state;
  41         channel->getState(state);
  42
  43         if ((m_last_channel_state != iDVBChannel::state_ok)
  44                 && (state == iDVBChannel::state_ok) && (!m_demux))
  45         {
  46                 if (m_channel)
  47                         if (m_channel->getDemux(m_demux, m_record ? 0 : iDVBChannel::capDecode))
  48                                 eDebug("Allocating a demux for now tuned-in channel failed.");
  49
  50                 serviceEvent(eventTuned);
  51
  52                 if (m_demux)
  53                 {
  54                         eDebug("ok ... now we start!!");
  55
  56                         m_PAT.begin(eApp, eDVBPATSpec(), m_demux);
  57
  58                         if ( m_service && !m_service->cacheEmpty() )
  59                                 serviceEvent(eventNewProgramInfo);
  60                 }
  61         } else if ((m_last_channel_state != iDVBChannel::state_failed) &&
  62                         (state == iDVBChannel::state_failed))
  63         {
  64                 eDebug("tune failed.");
  65                 serviceEvent(eventTuneFailed);
  66         }
  67 }
  68
  69 void eDVBServicePMTHandler::PMTready(int error)
  70 {
  71         if (error)
  72                 serviceEvent(eventNoPMT);
  73         else
  74         {
  75                 serviceEvent(eventNewProgramInfo);
  76                 eEPGCache::getInstance()->PMTready(this);
  77                 if (!m_pvr_channel)
  78                 {
  79                         if(!m_ca_servicePtr)   // don't send campmt to camd.socket for playbacked services
  80                         {
  81                                 uint8_t demux_num;
  82                                 m_demux->getCADemuxID(demux_num);
  83                                 eDVBCAService::register_service(m_reference, demux_num, m_ca_servicePtr);
  84                                 eDVBCIInterfaces::getInstance()->addPMTHandler(this);
  85                         }
  86                         eDVBCIInterfaces::getInstance()->gotPMT(this);
  87                 }
  88                 if (m_ca_servicePtr)
  89                 {
  90                         ePtr<eTable<ProgramMapSection> > ptr;
  91                         if (!m_PMT.getCurrent(ptr))
  92                                 m_ca_servicePtr->buildCAPMT(ptr);
  93                         else
  94                                 eDebug("eDVBServicePMTHandler cannot call buildCAPMT");
  95                 }
  96         }
  97 }
  98
  99 void eDVBServicePMTHandler::PATready(int)
 100 {
 101         eDebug("got PAT");
 102         ePtr<eTable<ProgramAssociationSection> > ptr;
 103         if (!m_PAT.getCurrent(ptr))
 104         {
 105                 int pmtpid = -1;
 106                 std::vector<ProgramAssociationSection*>::const_iterator i;
 107                 for (i = ptr->getSections().begin(); i != ptr->getSections().end(); ++i)
 108                 {
 109                         const ProgramAssociationSection &pat = **i;
 110                         ProgramAssociationConstIterator program;
 111                         for (program = pat.getPrograms()->begin(); program != pat.getPrograms()->end(); ++program)
 112                                 if (eServiceID((*program)->getProgramNumber()) == m_reference.getServiceID())
 113                                         pmtpid = (*program)->getProgramMapPid();
 114                 }
 115                 if (pmtpid == -1)
 116                         serviceEvent(eventNoPATEntry);
 117                 else
 118                         m_PMT.begin(eApp, eDVBPMTSpec(pmtpid, m_reference.getServiceID().get()), m_demux);
 119         } else
 120                 serviceEvent(eventNoPAT);
 121 }
 122
 123 int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 124 {
 125         ePtr<eTable<ProgramMapSection> > ptr;
 126
 127         program.videoStreams.clear();
 128         program.audioStreams.clear();
 129         program.pcrPid = -1;
 130         program.isCrypted = false;
 131
 132         if (!m_PMT.getCurrent(ptr))
 133         {
 134                 int cached_apid_ac3 = -1;
 135                 int cached_apid_mpeg = -1;
 136                 int cached_vpid = -1;
 137                 if ( m_service && !m_service->cacheEmpty() )
 138                 {
 139                         cached_vpid = m_service->getCachePID(eDVBService::cVPID);
 140                         cached_apid_mpeg = m_service->getCachePID(eDVBService::cAC3PID);
 141                         cached_apid_ac3 = m_service->getCachePID(eDVBService::cAPID);
 142                 }
 143                 eDVBTableSpec table_spec;
 144                 ptr->getSpec(table_spec);
 145                 program.pmtPid = table_spec.pid < 0x1fff ? table_spec.pid : -1;
 146                 std::vector<ProgramMapSection*>::const_iterator i;
 147                 for (i = ptr->getSections().begin(); i != ptr->getSections().end(); ++i)
 148                 {
 149                         const ProgramMapSection &pmt = **i;
 150                         program.pcrPid = pmt.getPcrPid();
 151
 152                         ElementaryStreamInfoConstIterator es;
 153                         for (es = pmt.getEsInfo()->begin(); es != pmt.getEsInfo()->end(); ++es)
 154                         {
 155                                 int isaudio = 0, isvideo = 0, cadescriptors = 0;
 156                                 videoStream video;
 157                                 audioStream audio;
 158                                 audio.component_tag=-1;
 159                                 video.component_tag=-1;
 160
 161                                 video.pid = (*es)->getPid();
 162                                 audio.pid = (*es)->getPid();
 163
 164                                 switch ((*es)->getType())
 165                                 {
 166                                 case 0x01: // MPEG 1 video
 167                                 case 0x02: // MPEG 2 video
 168                                         isvideo = 1;
 169                                         //break; fall through !!!
 170                                 case 0x03: // MPEG 1 audio
 171                                 case 0x04: // MPEG 2 audio:
 172                                         if (!isvideo)
 173                                         {
 174                                                 isaudio = 1;
 175                                                 audio.type = audioStream::atMPEG;
 176                                         }
 177                                         //break; fall through !!!
 178                                 case 0x06: // PES Private
 179                                                 /* PES private can contain AC-3, DTS or lots of other stuff.
 180                                                    check descriptors to get the exact type. */
 181                                         for (DescriptorConstIterator desc = (*es)->getDescriptors()->begin();
 182                                                         desc != (*es)->getDescriptors()->end(); ++desc)
 183                                         {
 184                                                 switch ((*desc)->getTag())
 185                                                 {
 186                                                 case AC3_DESCRIPTOR:
 187                                                         if (!isvideo)
 188                                                         {
 189                                                                 isaudio = 1;
 190                                                                 audio.type = audioStream::atAC3;
 191                                                         }
 192                                                         break;
 193                                                 case ISO_639_LANGUAGE_DESCRIPTOR:
 194                                                         if (!isvideo)
 195                                                         {
 196                                                                 const Iso639LanguageList *languages = ((Iso639LanguageDescriptor*)*desc)->getIso639Languages();
 197                                                                         /* use last language code */
 198                                                                 for (Iso639LanguageConstIterator i(languages->begin()); i != languages->end(); ++i)
 199                                                                         audio.language_code = (*i)->getIso639LanguageCode();
 200                                                         }
 201                                                         break;
 202                                                 case STREAM_IDENTIFIER_DESCRIPTOR:
 203                                                         audio.component_tag =
 204                                                                 video.component_tag =
 205                                                                         ((StreamIdentifierDescriptor*)*desc)->getComponentTag();
 206                                                         break;
 207                                                 case CA_DESCRIPTOR:
 208                                                         ++cadescriptors;
 209                                                         break;
 210                                                 }
 211                                         }
 212                                         break;
 213                                 }
 214                                 if (isaudio)
 215                                 {
 216                                         if ( !program.audioStreams.empty() &&
 217                                                 ( audio.pid == cached_apid_ac3 || audio.pid == cached_apid_mpeg) )
 218                                         {
 219                                                 program.audioStreams.push_back(program.audioStreams[0]);
 220                                                 program.audioStreams[0] = audio;
 221                                         }
 222                                         else
 223                                                 program.audioStreams.push_back(audio);
 224                                 }
 225                                 else if (isvideo)
 226                                 {
 227                                         if ( !program.videoStreams.empty() && video.pid == cached_vpid )
 228                                         {
 229                                                 program.videoStreams.push_back(program.videoStreams[0]);
 230                                                 program.videoStreams[0] = video;
 231                                         }
 232                                         else
 233                                                 program.videoStreams.push_back(video);
 234                                 }
 235                                 else
 236                                         continue;
 237                                 if ( cadescriptors > 0 )
 238                                         program.isCrypted=true;
 239                         }
 240                         if ( !program.isCrypted )
 241                         {
 242                                 for (DescriptorConstIterator desc = pmt.getDescriptors()->begin();
 243                                         desc != pmt.getDescriptors()->end(); ++desc)
 244                                 {
 245                                         switch ((*desc)->getTag())
 246                                         {
 247                                         case CA_DESCRIPTOR:
 248                                                 program.isCrypted=true;
 249                                                 break;
 250                                         }
 251                                 }
 252                                 break;
 253                         }
 254                 }
 255                 return 0;
 256         }
 257         else if ( m_service && !m_service->cacheEmpty() )
 258         {
 259                 int vpid = m_service->getCachePID(eDVBService::cVPID),
 260                         apid_ac3 = m_service->getCachePID(eDVBService::cAC3PID),
 261                         apid_mpeg = m_service->getCachePID(eDVBService::cAPID),
 262                         pcrpid = m_service->getCachePID(eDVBService::cPCRPID),
 263                         cnt=0;
 264                 if ( vpid != -1 )
 265                 {
 266                         videoStream s;
 267                         s.pid = vpid;
 268                         program.videoStreams.push_back(s);
 269                         ++cnt;
 270                 }
 271                 if ( apid_ac3 != -1 )
 272                 {
 273                         audioStream s;
 274                         s.type = audioStream::atAC3;
 275                         s.pid = apid_ac3;
 276                         program.audioStreams.push_back(s);
 277                         ++cnt;
 278                 }
 279                 if ( apid_mpeg != -1 )
 280                 {
 281                         audioStream s;
 282                         s.type = audioStream::atMPEG;
 283                         s.pid = apid_mpeg;
 284                         program.audioStreams.push_back(s);
 285                         ++cnt;
 286                 }
 287                 if ( pcrpid != -1 )
 288                 {
 289                         ++cnt;
 290                         program.pcrPid = pcrpid;
 291                 }
 292                 if ( cnt )
 293                         return 0;
 294         }
 295         return -1;
 296 }
 297
 298 int eDVBServicePMTHandler::getChannel(eUsePtr<iDVBChannel> &channel)
 299 {
 300         channel = m_channel;
 301         if (channel)
 302                 return 0;
 303         else
 304                 return -1;
 305 }
 306
 307 int eDVBServicePMTHandler::getDemux(ePtr<iDVBDemux> &demux)
 308 {
 309         demux = m_demux;
 310         if (demux)
 311                 return 0;
 312         else
 313                 return -1;
 314 }
 315
 316 int eDVBServicePMTHandler::getPVRChannel(ePtr<iDVBPVRChannel> &pvr_channel)
 317 {
 318         pvr_channel = m_pvr_channel;
 319         if (pvr_channel)
 320                 return 0;
 321         else
 322                 return -1;
 323 }
 324
 325 int eDVBServicePMTHandler::tune(eServiceReferenceDVB &ref)
 326 {
 327         RESULT res;
 328         m_reference = ref;
 329
 330                 /* is this a normal (non PVR) channel? */
 331         if (ref.path.empty())
 332         {
 333                 eDVBChannelID chid;
 334                 ref.getChannelID(chid);
 335                 res = m_resourceManager->allocateChannel(chid, m_channel);
 336                 eDebug("allocate Channel: res %d", res);
 337         } else
 338         {
 339                 eDVBMetaParser parser;
 340
 341                 if (parser.parseFile(ref.path))
 342                         eWarning("no .meta file found, trying original service ref.");
 343                 else
 344                         m_reference = parser.m_ref;
 345
 346                 eDebug("alloc PVR");
 347                         /* allocate PVR */
 348                 res = m_resourceManager->allocatePVRChannel(m_pvr_channel);
 349                 if (res)
 350                         eDebug("allocatePVRChannel failed!\n");
 351                 m_channel = m_pvr_channel;
 352         }
 353
 354         if (m_channel)
 355         {
 356                 m_channel->connectStateChange(
 357                         slot(*this, &eDVBServicePMTHandler::channelStateChanged),
 358                         m_channelStateChanged_connection);
 359                 m_last_channel_state = -1;
 360                 channelStateChanged(m_channel);
 361         } else
 362         {
 363                 serviceEvent(eventTuneFailed);
 364                 return res;
 365         }
 366
 367         if (m_pvr_channel)
 368                 m_pvr_channel->playFile(ref.path.c_str());
 369
 370         ePtr<iDVBChannelList> db;
 371         if (!m_resourceManager->getChannelList(db))
 372                 db->getService((eServiceReferenceDVB&)m_reference, m_service);
 373
 374         return res;
 375 }
 376
 377 std::map<eServiceReferenceDVB, eDVBCAService*> eDVBCAService::exist;
 378
 379 eDVBCAService::eDVBCAService()
 380         :m_prev_build_hash(0), m_sendstate(0), m_retryTimer(eApp)
 381 {
 382         memset(m_used_demux, 0xFF, sizeof(m_used_demux));
 383         CONNECT(m_retryTimer.timeout, eDVBCAService::sendCAPMT);
 384         Connect();
 385 }
 386
 387 eDVBCAService::~eDVBCAService()
 388 {
 389         eDebug("[eDVBCAService] free service %s", m_service.toString().c_str());
 390         ::close(m_sock);
 391 }
 392
 393 RESULT eDVBCAService::register_service( const eServiceReferenceDVB &ref, int demux_num, eDVBCAService *&caservice )
 394 {
 395         CAServiceMap::iterator it = exist.find(ref);
 396         if ( it != exist.end() )
 397                 caservice = it->second;
 398         else
 399         {
 400                 caservice = (exist[ref]=new eDVBCAService());
 401                 caservice->m_service = ref;
 402                 eDebug("[eDVBCAService] new service %s", ref.toString().c_str() );
 403         }
 404 // search free demux entry
 405         int iter=0, max_demux_slots = sizeof(caservice->m_used_demux);
 406
 407         while ( iter < max_demux_slots && caservice->m_used_demux[iter] != 0xFF )
 408                 ++iter;
 409
 410         if ( iter < max_demux_slots )
 411         {
 412                 caservice->m_used_demux[iter] = demux_num & 0xFF;
 413                 eDebug("[eDVBCAService] add demux %d to slot %d service %s", demux_num, iter, ref.toString().c_str());
 414         }
 415         else
 416         {
 417                 eDebug("[eDVBCAService] no more demux slots free for service %s!!", ref.toString().c_str());
 418                 return -1;
 419         }
 420         return 0;
 421 }
 422
 423 RESULT eDVBCAService::unregister_service( const eServiceReferenceDVB &ref, int demux_num, eTable<ProgramMapSection> *ptr )
 424 {
 425         CAServiceMap::iterator it = exist.find(ref);
 426         if ( it == exist.end() )
 427         {
 428                 eDebug("[eDVBCAService] try to unregister non registered %s", ref.toString().c_str());
 429                 return -1;
 430         }
 431         else
 432         {
 433                 eDVBCAService *caservice = it->second;
 434                 bool freed = false;
 435                 int iter = 0,
 436                         used_demux_slots = 0,
 437                         max_demux_slots = sizeof(caservice->m_used_demux)/sizeof(int);
 438                 while ( iter < max_demux_slots )
 439                 {
 440                         if ( caservice->m_used_demux[iter] != 0xFF )
 441                         {
 442                                 if ( !freed && caservice->m_used_demux[iter] == demux_num )
 443                                 {
 444                                         eDebug("[eDVBCAService] free slot %d demux %d for service %s", iter, caservice->m_used_demux[iter], caservice->m_service.toString().c_str() );
 445                                         caservice->m_used_demux[iter] = 0xFF;
 446                                         freed=true;
 447                                 }
 448                                 else
 449                                         ++used_demux_slots;
 450                         }
 451                         ++iter;
 452                 }
 453                 if (!freed)
 454                 {
 455                         eDebug("[eDVBCAService] couldn't free demux slot for demux %d", demux_num);
 456                         return -1;
 457                 }
 458                 if (!used_demux_slots)  // no more used.. so we remove it
 459                 {
 460                         delete it->second;
 461                         exist.erase(it);
 462                 }
 463                 else
 464                 {
 465                         if (ptr)
 466                                 it->second->buildCAPMT(ptr);
 467                         else
 468                                 eDebug("[eDVBCAService] can not send updated demux info");
 469                 }
 470         }
 471         return 0;
 472 }
 473
 474 void eDVBCAService::Connect()
 475 {
 476         memset(&m_servaddr, 0, sizeof(struct sockaddr_un));
 477         m_servaddr.sun_family = AF_UNIX;
 478         strcpy(m_servaddr.sun_path, "/tmp/camd.socket");
 479         m_clilen = sizeof(m_servaddr.sun_family) + strlen(m_servaddr.sun_path);
 480         m_sock = socket(PF_UNIX, SOCK_STREAM, 0);
 481         connect(m_sock, (struct sockaddr *) &m_servaddr, m_clilen);
 482         fcntl(m_sock, F_SETFL, O_NONBLOCK);
 483         int val=1;
 484         setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &val, 4);
 485 }
 486
 487 void eDVBCAService::buildCAPMT(eTable<ProgramMapSection> *ptr)
 488 {
 489         if (!ptr)
 490                 return;
 491
 492         eDVBTableSpec table_spec;
 493         ptr->getSpec(table_spec);
 494
 495         int pmtpid = table_spec.pid,
 496                 pmt_version = table_spec.version;
 497
 498         uint8_t demux_mask = 0;
 499         uint8_t first_demux_num = 0xFF;
 500
 501 #if 1
 502         int iter=0, max_demux_slots = sizeof(m_used_demux);
 503         while ( iter < max_demux_slots )
 504         {
 505                 if ( m_used_demux[iter] != 0xFF )
 506                 {
 507                         if ( first_demux_num == 0xFF )
 508                                 first_demux_num = m_used_demux[iter];
 509                         demux_mask |= (1 << m_used_demux[iter]);
 510                 }
 511                 ++iter;
 512         }
 513 #else
 514         demux_mask = 3;
 515         first_demux_num = 0;
 516 #endif
 517
 518         if ( first_demux_num == 0xFF )
 519         {
 520                 eDebug("[eDVBCAService] no demux found for service %s", m_service.toString().c_str() );
 521                 return;
 522         }
 523
 524         eDebug("demux %d mask %02x prevhash %08x", first_demux_num, demux_mask, m_prev_build_hash);
 525
 526         unsigned int build_hash = (pmtpid << 16);
 527         build_hash |= (demux_mask << 8);
 528         build_hash |= (pmt_version&0xFF);
 529
 530         if ( build_hash == m_prev_build_hash )
 531         {
 532                 eDebug("[eDVBCAService] don't build/send the same CA PMT twice");
 533                 return;
 534         }
 535
 536         std::vector<ProgramMapSection*>::const_iterator i=ptr->getSections().begin();
 537         if ( i != ptr->getSections().end() )
 538         {
 539                 CaProgramMapSection capmt(*i++, m_prev_build_hash ? 0x05 /*update*/ : 0x03 /*only*/, 0x01 );
 540
 541                 while( i != ptr->getSections().end() )
 542                 {
 543 //                      eDebug("append");
 544                         capmt.append(*i++);
 545                 }
 546
 547                 // add our private descriptors to capmt
 548                 uint8_t tmp[10];
 549
 550                 tmp[0]=0x84;  // pmt pid
 551                 tmp[1]=0x02;
 552                 tmp[2]=pmtpid>>8;
 553                 tmp[3]=pmtpid&0xFF;
 554                 capmt.injectDescriptor(tmp, false);
 555
 556                 tmp[0] = 0x82; // demux
 557                 tmp[1] = 0x02;
 558                 tmp[2] = demux_mask;    // descramble bitmask
 559                 tmp[3] = first_demux_num; // read section data from demux number
 560                 capmt.injectDescriptor(tmp, false);
 561
 562                 tmp[0] = 0x81; // dvbnamespace
 563                 tmp[1] = 0x08;
 564                 tmp[2] = m_service.getDVBNamespace().get()>>24;
 565                 tmp[3]=(m_service.getDVBNamespace().get()>>16)&0xFF;
 566                 tmp[4]=(m_service.getDVBNamespace().get()>>8)&0xFF;
 567                 tmp[5]=m_service.getDVBNamespace().get()&0xFF;
 568                 tmp[6]=m_service.getTransportStreamID().get()>>8;
 569                 tmp[7]=m_service.getTransportStreamID().get()&0xFF;
 570                 tmp[8]=m_service.getOriginalNetworkID().get()>>8;
 571                 tmp[9]=m_service.getOriginalNetworkID().get()&0xFF;
 572                 capmt.injectDescriptor(tmp, false);
 573
 574                 capmt.writeToBuffer(m_capmt);
 575         }
 576
 577         m_prev_build_hash = build_hash;
 578
 579         if ( m_sendstate != 0xFFFFFFFF )
 580                 m_sendstate=0;
 581         sendCAPMT();
 582 }
 583
 584 void eDVBCAService::sendCAPMT()
 585 {
 586         if ( m_sendstate && m_sendstate != 0xFFFFFFFF ) // broken pipe retry
 587         {
 588                 ::close(m_sock);
 589                 Connect();
 590         }
 591
 592         int wp=0;
 593         if ( m_capmt[3] & 0x80 )
 594         {
 595                 int i=0;
 596                 int lenbytes = m_capmt[3] & ~0x80;
 597                 while(i < lenbytes)
 598                         wp = (wp << 8) | m_capmt[4 + i++];
 599                 wp+=4;
 600                 wp+=lenbytes;
 601         }
 602         else
 603         {
 604                 wp = m_capmt[3];
 605                 wp+=4;
 606         }
 607
 608         if ( write(m_sock, m_capmt, wp) == wp )
 609         {
 610                 m_sendstate=0xFFFFFFFF;
 611                 eDebug("[eDVBCAService] send %d bytes",wp);
 612 #if 1
 613                 for(int i=0;i<wp;i++)
 614                         eDebugNoNewLine("%02x ", m_capmt[i]);
 615                 eDebug("");
 616 #endif
 617         }
 618         else
 619         {
 620                 switch(m_sendstate)
 621                 {
 622                         case 0xFFFFFFFF:
 623                                 ++m_sendstate;
 624                                 m_retryTimer.start(0,true);
 625 //                              eDebug("[eDVBCAService] send failed .. immediate retry");
 626                                 break;
 627                         default:
 628                                 m_retryTimer.start(5000,true);
 629 //                              eDebug("[eDVBCAService] send failed .. retry in 5 sec");
 630                                 break;
 631                 }
 632                 ++m_sendstate;
 633         }
 634 }