code.vuplus.com Git - vuplus_dvbapp/blob - lib/dvb/db.cpp

   1 #include <errno.h>
   2 #include <lib/dvb/db.h>
   3 #include <lib/dvb/frontend.h>
   4 #include <lib/base/eerror.h>
   5 #include <lib/base/estring.h>
   6 #include <dvbsi++/service_description_section.h>
   7 #include <dvbsi++/descriptor_tag.h>
   8 #include <dvbsi++/service_descriptor.h>
   9 #include <dvbsi++/satellite_delivery_system_descriptor.h>
  10
  11 DEFINE_REF(eDVBService);
  12
  13 eDVBService::eDVBService()
  14 {
  15 }
  16
  17 eDVBService::~eDVBService()
  18 {
  19 }
  20
  21 eDVBService &eDVBService::operator=(const eDVBService &s)
  22 {
  23         m_service_name = s.m_service_name;
  24         m_service_name_sort = s.m_service_name_sort;
  25         m_provider_name = s.m_provider_name;
  26         m_flags = s.m_flags;
  27         m_ca = s.m_ca;
  28         m_cache = s.m_cache;
  29         return *this;
  30 }
  31
  32 RESULT eDVBService::getName(const eServiceReference &ref, std::string &name)
  33 {
  34         name = m_service_name;
  35         return 0;
  36 }
  37
  38 int eDVBService::getLength(const eServiceReference &ref)
  39 {
  40         return -1;
  41 }
  42
  43 int eDVBService::checkFilter(const eServiceReferenceDVB &ref, const eDVBChannelQuery &query)
  44 {
  45         int res = 0;
  46         switch (query.m_type)
  47         {
  48         case eDVBChannelQuery::tName:
  49                 res = m_service_name_sort.find(query.m_string) != std::string::npos;
  50                 break;
  51         case eDVBChannelQuery::tProvider:
  52                 res = m_provider_name.find(query.m_string) != std::string::npos;
  53                 break;
  54         case eDVBChannelQuery::tType:
  55                 res = ref.getServiceType() == query.m_int;
  56                 break;
  57         case eDVBChannelQuery::tBouquet:
  58                 res = 0;
  59                 break;
  60         case eDVBChannelQuery::tSatellitePosition:
  61                 res = (ref.getDVBNamespace().get() >> 16) == query.m_int;
  62                 break;
  63         case eDVBChannelQuery::tChannelID:
  64         {
  65                 eDVBChannelID chid;
  66                 ref.getChannelID(chid);
  67                 res = chid == query.m_channelid;
  68                 break;
  69         }
  70         case eDVBChannelQuery::tAND:
  71                 res = checkFilter(ref, *query.m_p1) && checkFilter(ref, *query.m_p2);
  72                 break;
  73         case eDVBChannelQuery::tOR:
  74                 res = checkFilter(ref, *query.m_p1) || checkFilter(ref, *query.m_p2);
  75                 break;
  76         }
  77
  78         if (query.m_inverse)
  79                 return !res;
  80         else
  81                 return res;
  82 }
  83
  84 int eDVBService::getCachePID(cacheID id)
  85 {
  86         std::map<int, int>::iterator it = m_cache.find(id);
  87         if ( it != m_cache.end() )
  88                 return it->second;
  89         return -1;
  90 }
  91
  92 void eDVBService::setCachePID(cacheID id, int pid)
  93 {
  94         m_cache[id] = pid;
  95 }
  96
  97 DEFINE_REF(eDVBDB);
  98
  99         /* THIS CODE IS BAD. it should be replaced by somethine better. */
 100 void eDVBDB::load()
 101 {
 102         eDebug("---- opening lame channel db");
 103         FILE *f=fopen("lamedb", "rt");
 104         if (!f)
 105                 return;
 106         char line[256];
 107         if ((!fgets(line, 256, f)) || strncmp(line, "eDVB services", 13))
 108         {
 109                 eDebug("not a servicefile");
 110                 fclose(f);
 111                 return;
 112         }
 113         eDebug("reading services");
 114         if ((!fgets(line, 256, f)) || strcmp(line, "transponders\n"))
 115         {
 116                 eDebug("services invalid, no transponders");
 117                 fclose(f);
 118                 return;
 119         }
 120
 121         // clear all transponders
 122
 123         while (!feof(f))
 124         {
 125                 if (!fgets(line, 256, f))
 126                         break;
 127                 if (!strcmp(line, "end\n"))
 128                         break;
 129                 int dvb_namespace=-1, transport_stream_id=-1, original_network_id=-1;
 130                 sscanf(line, "%x:%x:%x", &dvb_namespace, &transport_stream_id, &original_network_id);
 131                 if (original_network_id == -1)
 132                         continue;
 133                 eDVBChannelID channelid = eDVBChannelID(
 134                         eDVBNamespace(dvb_namespace),
 135                         eTransportStreamID(transport_stream_id),
 136                         eOriginalNetworkID(original_network_id));
 137
 138                 ePtr<eDVBFrontendParameters> feparm = new eDVBFrontendParameters;
 139                 while (!feof(f))
 140                 {
 141                         fgets(line, 256, f);
 142                         if (!strcmp(line, "/\n"))
 143                                 break;
 144                         if (line[1]=='s')
 145                         {
 146                                 eDVBFrontendParametersSatellite sat;
 147                                 int frequency, symbol_rate, polarisation, fec, orbital_position, inversion;
 148                                 sscanf(line+2, "%d:%d:%d:%d:%d:%d", &frequency, &symbol_rate, &polarisation, &fec, &orbital_position, &inversion);
 149                                 sat.frequency = frequency;
 150                                 sat.symbol_rate = symbol_rate;
 151                                 sat.polarisation = polarisation;
 152                                 sat.fec = fec;
 153                                 sat.orbital_position = orbital_position;
 154                                 sat.inversion = inversion;
 155                                 // ...
 156 //                              t.setSatellite(frequency, symbol_rate, polarisation, fec, sat, inversion);
 157                                 feparm->setDVBS(sat);
 158                         } else if (line[1]=='t')
 159                         {
 160                                 eDVBFrontendParametersTerrestrial ter;
 161                                 int frequency, bandwidth, code_rate_HP, code_rate_LP, modulation, transmission_mode, guard_interval, hierarchy, inversion;
 162                                 sscanf(line+2, "%d:%d:%d:%d:%d:%d:%d:%d:%d", &frequency, &bandwidth, &code_rate_HP, &code_rate_LP, &modulation, &transmission_mode, &guard_interval, &hierarchy, &inversion);
 163                                 ter.frequency = frequency;
 164                                 ter.bandwidth = bandwidth;
 165                                 ter.code_rate_HP = code_rate_HP;
 166                                 ter.code_rate_LP = code_rate_LP;
 167                                 ter.modulation = modulation;
 168                                 ter.transmission_mode = transmission_mode;
 169                                 ter.guard_interval = guard_interval;
 170                                 ter.hierarchy = hierarchy;
 171                                 ter.inversion = inversion;
 172
 173                                 feparm->setDVBT(ter);
 174                         } else if (line[1]=='c')
 175                         {
 176                                 int frequency, symbol_rate, inversion=0, modulation=3;
 177                                 sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);
 178 //                              t.setCable(frequency, symbol_rate, inversion, modulation);
 179                         }
 180                 }
 181                 addChannelToList(channelid, feparm);
 182         }
 183
 184         if ((!fgets(line, 256, f)) || strcmp(line, "services\n"))
 185         {
 186                 eDebug("services invalid, no services");
 187                 return;
 188         }
 189
 190         // clear all services
 191
 192         int count=0;
 193
 194         while (!feof(f))
 195         {
 196                 if (!fgets(line, 256, f))
 197                         break;
 198                 if (!strcmp(line, "end\n"))
 199                         break;
 200
 201                 int service_id=-1, dvb_namespace, transport_stream_id=-1, original_network_id=-1, service_type=-1, service_number=-1;
 202                 sscanf(line, "%x:%x:%x:%x:%d:%d", &service_id, &dvb_namespace, &transport_stream_id, &original_network_id, &service_type, &service_number);
 203                 if (service_number == -1)
 204                         continue;
 205                 ePtr<eDVBService> s = new eDVBService;
 206                 eServiceReferenceDVB ref =
 207                                                 eServiceReferenceDVB(
 208                                                 eDVBNamespace(dvb_namespace),
 209                                                 eTransportStreamID(transport_stream_id),
 210                                                 eOriginalNetworkID(original_network_id),
 211                                                 eServiceID(service_id),
 212                                                 service_type);
 213                 count++;
 214                 fgets(line, 256, f);
 215                 if (strlen(line))
 216                         line[strlen(line)-1]=0;
 217
 218                 s->m_service_name = line;
 219                 s->m_service_name_sort = removeDVBChars(line);
 220                 makeUpper(s->m_service_name_sort);
 221
 222                 fgets(line, 256, f);
 223                 if (strlen(line))
 224                         line[strlen(line)-1]=0;
 225
 226                 std::string str=line;
 227
 228                 if (str[1]!=':')        // old ... (only service_provider)
 229                 {
 230                         s->m_provider_name=line;
 231                 } else
 232                         while ((!str.empty()) && str[1]==':') // new: p:, f:, c:%02d...
 233                         {
 234                                 unsigned int c=str.find(',');
 235                                 char p=str[0];
 236                                 std::string v;
 237                                 if (c == std::string::npos)
 238                                 {
 239                                         v=str.substr(2);
 240                                         str="";
 241                                 } else
 242                                 {
 243                                         v=str.substr(2, c-2);
 244                                         str=str.substr(c+1);
 245                                 }
 246 //                              eDebug("%c ... %s", p, v.c_str());
 247                                 if (p == 'p')
 248                                         s->m_provider_name=v;
 249                                 else if (p == 'f')
 250                                 {
 251                                         sscanf(v.c_str(), "%x", &s->m_flags);
 252                                 } else if (p == 'c')
 253                                 {
 254                                         int cid, val;
 255                                         sscanf(v.c_str(), "%02d%04x", &cid, &val);
 256                                         s->m_cache[cid]=val;
 257                                 } else if (p == 'C')
 258                                 {
 259                                         int val;
 260                                         sscanf(v.c_str(), "%04x", &val);
 261                                         s->m_ca.insert(val);
 262                                 }
 263                         }
 264                 addService(ref, s);
 265         }
 266
 267         eDebug("loaded %d services", count);
 268
 269         fclose(f);
 270 }
 271
 272 void eDVBDB::save()
 273 {
 274         eDebug("---- saving lame channel db");
 275         FILE *f=fopen("lamedb", "wt");
 276         int channels=0, services=0;
 277         if (!f)
 278                 eFatal("couldn't save lame channel db!");
 279         fprintf(f, "eDVB services /3/\n");
 280         fprintf(f, "transponders\n");
 281         for (std::map<eDVBChannelID, channel>::const_iterator i(m_channels.begin());
 282                         i != m_channels.end(); ++i)
 283         {
 284                 const eDVBChannelID &chid = i->first;
 285                 const channel &ch = i->second;
 286
 287                 fprintf(f, "%08x:%04x:%04x\n", chid.dvbnamespace.get(),
 288                                 chid.transport_stream_id.get(), chid.original_network_id.get());
 289                 eDVBFrontendParametersSatellite sat;
 290                 eDVBFrontendParametersTerrestrial ter;
 291                 if (!ch.m_frontendParameters->getDVBS(sat))
 292                 {
 293                         fprintf(f, "\ts %d:%d:%d:%d:%d:%d\n",
 294                                 sat.frequency, sat.symbol_rate,
 295                                 sat.polarisation, sat.fec, sat.orbital_position,
 296                                 sat.inversion);
 297                 }
 298                 if (!ch.m_frontendParameters->getDVBT(ter))
 299                 {
 300                         fprintf(f, "\tt %d:%d:%d:%d:%d:%d:%d:%d:%d\n",
 301                                 ter.frequency, ter.bandwidth, ter.code_rate_HP,
 302                                 ter.code_rate_LP, ter.modulation, ter.transmission_mode,
 303                                 ter.guard_interval, ter.hierarchy, ter.inversion);
 304                 }
 305                 fprintf(f, "/\n");
 306                 channels++;
 307         }
 308         fprintf(f, "end\nservices\n");
 309
 310         for (std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i(m_services.begin());
 311                 i != m_services.end(); ++i)
 312         {
 313                 const eServiceReferenceDVB &s = i->first;
 314                 fprintf(f, "%04x:%08x:%04x:%04x:%d:%d\n",
 315                                 s.getServiceID().get(), s.getDVBNamespace().get(),
 316                                 s.getTransportStreamID().get(),s.getOriginalNetworkID().get(),
 317                                 s.getServiceType(),
 318                                 0);
 319
 320                 fprintf(f, "%s\n", i->second->m_service_name.c_str());
 321                 fprintf(f, "p:%s", i->second->m_provider_name.c_str());
 322
 323                 // write cached pids
 324                 for (std::map<int,int>::const_iterator ca(i->second->m_cache.begin());
 325                         ca != i->second->m_cache.end(); ++ca)
 326                         fprintf(f, ",c:%02d%04x", ca->first, ca->second);
 327
 328                 // write cached ca pids
 329                 for (std::set<int>::const_iterator ca(i->second->m_ca.begin());
 330                         ca != i->second->m_ca.end(); ++ca)
 331                         fprintf(f, ",C:%04x", *ca);
 332
 333                 fprintf(f, "\n");
 334                 services++;
 335         }
 336         fprintf(f, "end\nHave a lot of bugs!\n");
 337         eDebug("saved %d channels and %d services!", channels, services);
 338         fclose(f);
 339 }
 340
 341 eDVBDB::eDVBDB()
 342 {
 343         load();
 344 }
 345
 346 eDVBDB::~eDVBDB()
 347 {
 348 //      save();
 349 }
 350
 351 RESULT eDVBDB::addChannelToList(const eDVBChannelID &id, iDVBFrontendParameters *feparm)
 352 {
 353         channel ch;
 354         assert(feparm);
 355         ch.m_frontendParameters = feparm;
 356         m_channels.insert(std::pair<eDVBChannelID, channel>(id, ch));
 357         return 0;
 358 }
 359
 360 RESULT eDVBDB::removeChannel(const eDVBChannelID &id)
 361 {
 362         m_channels.erase(id);
 363         return 0;
 364 }
 365
 366 RESULT eDVBDB::getChannelFrontendData(const eDVBChannelID &id, ePtr<iDVBFrontendParameters> &parm)
 367 {
 368         std::map<eDVBChannelID, channel>::iterator i = m_channels.find(id);
 369         if (i == m_channels.end())
 370         {
 371                 parm = 0;
 372                 return -ENOENT;
 373         }
 374         parm = i->second.m_frontendParameters;
 375         return 0;
 376 }
 377
 378 RESULT eDVBDB::addService(const eServiceReferenceDVB &serviceref, eDVBService *service)
 379 {
 380         m_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(serviceref, service));
 381         return 0;
 382 }
 383
 384 RESULT eDVBDB::getService(const eServiceReferenceDVB &reference, ePtr<eDVBService> &service)
 385 {
 386         std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i;
 387         i = m_services.find(reference);
 388         if (i == m_services.end())
 389         {
 390                 service = 0;
 391                 return -ENOENT;
 392         }
 393         service = i->second;
 394         return 0;
 395 }
 396
 397 RESULT eDVBDB::startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *q)
 398 {
 399         query = new eDVBDBQuery(this, eServiceReference(), q);
 400         return 0;
 401 }
 402
 403 DEFINE_REF(eDVBDBQuery);
 404
 405 eDVBDBQuery::eDVBDBQuery(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query): m_db(db), m_query(query)
 406 {
 407                 // TODO: use SOURCE ...
 408         m_cursor = m_db->m_services.begin();
 409 }
 410
 411 RESULT eDVBDBQuery::getNextResult(eServiceReferenceDVB &ref)
 412 {
 413         while (m_cursor != m_db->m_services.end())
 414         {
 415                 ref = m_cursor->first;
 416
 417                 int res = (!m_query) || m_cursor->second->checkFilter(ref, *m_query);
 418
 419                 ++m_cursor;
 420
 421                 if (res)
 422                         return 0;
 423         }
 424
 425         ref = eServiceReferenceDVB();
 426         return 1;
 427 }
 428
 429 int eDVBDBQuery::compareLessEqual(const eServiceReferenceDVB &a, const eServiceReferenceDVB &b)
 430 {
 431         ePtr<eDVBService> a_service, b_service;
 432
 433         int sortmode = m_query ? m_query->m_sort : eDVBChannelQuery::tName;
 434
 435         if ((sortmode == eDVBChannelQuery::tName) || (sortmode == eDVBChannelQuery::tProvider))
 436         {
 437                 if (m_db->getService(a, a_service))
 438                         return 1;
 439                 if (m_db->getService(b, b_service))
 440                         return 1;
 441         }
 442
 443         switch (sortmode)
 444         {
 445         case eDVBChannelQuery::tName:
 446                 return a_service->m_service_name_sort < b_service->m_service_name_sort;
 447         case eDVBChannelQuery::tProvider:
 448                 return a_service->m_provider_name < b_service->m_provider_name;
 449         case eDVBChannelQuery::tType:
 450                 return a.getServiceType() < b.getServiceType();
 451         case eDVBChannelQuery::tBouquet:
 452                 return 1;
 453         case eDVBChannelQuery::tSatellitePosition:
 454                 return (a.getDVBNamespace().get() >> 16) < (b.getDVBNamespace().get() >> 16);
 455         default:
 456                 return 1;
 457         }
 458         return 0;
 459 }
 460
 461 /* (<name|provider|type|bouquet|satpos|chid> <==|...> <"string"|int>)[||,&& (..)] */
 462
 463 static int decodeType(const std::string &type)
 464 {
 465         if (type == "name")
 466                 return eDVBChannelQuery::tName;
 467         else if (type == "provider")
 468                 return eDVBChannelQuery::tProvider;
 469         else if (type == "type")
 470                 return eDVBChannelQuery::tType;
 471         else if (type == "bouquet")
 472                 return eDVBChannelQuery::tBouquet;
 473         else if (type == "satellitePosition")
 474                 return eDVBChannelQuery::tSatellitePosition;
 475         else if (type == "channelID")
 476                 return eDVBChannelQuery::tChannelID;
 477         else
 478                 return -1;
 479 }
 480
 481         /* never, NEVER write a parser in C++! */
 482 RESULT parseExpression(ePtr<eDVBChannelQuery> &res, std::list<std::string>::const_iterator begin, std::list<std::string>::const_iterator end)
 483 {
 484         std::list<std::string>::const_iterator end_of_exp;
 485         if (*begin == "(")
 486         {
 487                 end_of_exp = begin;
 488                 while (end_of_exp != end)
 489                         if (*end_of_exp == ")")
 490                                 break;
 491                         else
 492                                 ++end_of_exp;
 493
 494                 if (end_of_exp == end)
 495                 {
 496                         eDebug("expression parse: end of expression while searching for closing brace");
 497                         return -1;
 498                 }
 499
 500                 ++begin;
 501                 // begin..end_of_exp
 502                 int r = parseExpression(res, begin, end_of_exp);
 503                 if (r)
 504                         return r;
 505                 ++end_of_exp;
 506
 507                         /* we had only one sub expression */
 508                 if (end_of_exp == end)
 509                 {
 510                         eDebug("only one sub expression");
 511                         return 0;
 512                 }
 513
 514                         /* otherwise we have an operator here.. */
 515
 516                 ePtr<eDVBChannelQuery> r2 = res;
 517                 res = new eDVBChannelQuery();
 518                 res->m_sort = 0;
 519                 res->m_p1 = r2;
 520                 res->m_inverse = 0;
 521                 r2 = 0;
 522
 523                 if (*end_of_exp == "||")
 524                         res->m_type = eDVBChannelQuery::tOR;
 525                 else if (*end_of_exp == "&&")
 526                         res->m_type = eDVBChannelQuery::tAND;
 527                 else
 528                 {
 529                         eDebug("found operator %s, but only && and || are allowed!", end_of_exp->c_str());
 530                         res = 0;
 531                         return 1;
 532                 }
 533
 534                 ++end_of_exp;
 535
 536                 return parseExpression(res->m_p2, end_of_exp, end);
 537         }
 538
 539         // "begin" <op> "end"
 540         std::string type, op, val;
 541
 542         res = new eDVBChannelQuery();
 543         res->m_sort = 0;
 544
 545         int cnt = 0;
 546         while (begin != end)
 547         {
 548                 switch (cnt)
 549                 {
 550                 case 0:
 551                         type = *begin;
 552                         break;
 553                 case 1:
 554                         op = *begin;
 555                         break;
 556                 case 2:
 557                         val = *begin;
 558                         break;
 559                 case 3:
 560                         eDebug("malformed query: got '%s', but expected only <type> <op> <val>", begin->c_str());
 561                         return 1;
 562                 }
 563                 ++begin;
 564                 ++cnt;
 565         }
 566
 567         if (cnt != 3)
 568         {
 569                 eDebug("malformed query: missing stuff");
 570                 res = 0;
 571                 return 1;
 572         }
 573
 574         res->m_type = decodeType(type);
 575
 576         if (res->m_type == -1)
 577         {
 578                 eDebug("malformed query: invalid type %s", type.c_str());
 579                 res = 0;
 580                 return 1;
 581         }
 582
 583         if (op == "==")
 584                 res->m_inverse = 0;
 585         else if (op == "!=")
 586                 res->m_inverse = 1;
 587         else
 588         {
 589                 eDebug("invalid operator %s", op.c_str());
 590                 res = 0;
 591                 return 1;
 592         }
 593
 594         res->m_string = val;
 595         res->m_int = atoi(val.c_str());
 596 //      res->m_channelid = eDVBChannelID(val);
 597
 598         return 0;
 599 }
 600
 601 RESULT eDVBChannelQuery::compile(ePtr<eDVBChannelQuery> &res, std::string query)
 602 {
 603         std::list<std::string> tokens;
 604
 605         std::string current_token;
 606
 607         eDebug("splitting %s....", query.c_str());
 608         unsigned int i = 0;
 609         const char *splitchars="()";
 610         int quotemode = 0, lastsplit = 0, lastalnum = 0;
 611         while (i <= query.size())
 612         {
 613                 int c = (i < query.size()) ? query[i] : ' ';
 614                 ++i;
 615
 616                 int issplit = !!strchr(splitchars, c);
 617                 int isaln = isalnum(c);
 618                 int iswhite = c == ' ';
 619                 int isquot = c == '\"';
 620
 621                 if (quotemode)
 622                 {
 623                         iswhite = issplit = 0;
 624                         isaln = lastalnum;
 625                 }
 626
 627                 if (issplit || iswhite || isquot || lastsplit || (lastalnum != isaln))
 628                 {
 629                         if (current_token.size())
 630                                 tokens.push_back(current_token);
 631                         current_token.clear();
 632                 }
 633
 634                 if (!(iswhite || isquot))
 635                         current_token += c;
 636
 637                 if (isquot)
 638                         quotemode = !quotemode;
 639                 lastsplit = issplit;
 640                 lastalnum = isaln;
 641         }
 642
 643 //      for (std::list<std::string>::const_iterator a(tokens.begin()); a != tokens.end(); ++a)
 644 //      {
 645 //              printf("%s\n", a->c_str());
 646 //      }
 647
 648         int sort = eDVBChannelQuery::tName;
 649                 /* check for "ORDER BY ..." */
 650         if (tokens.size() > 2)
 651         {
 652                 std::list<std::string>::iterator i = tokens.end();
 653                 --i; --i; --i;
 654                 if (*i == "ORDER")
 655                 {
 656                         ++i;
 657                         if (*i == "BY")
 658                         {
 659                                 ++i;
 660                                 sort = decodeType(*i);
 661                                 tokens.pop_back(); // ...
 662                                 tokens.pop_back(); // BY
 663                                 tokens.pop_back(); // ORDER
 664                         } else
 665                                 sort = -1;
 666                 }
 667         }
 668
 669         if (sort == -1)
 670         {
 671                 eWarning("ORDER BY .. string invalid.");
 672                 res = 0;
 673                 return -1;
 674         }
 675
 676         eDebug("sort by %d", sort);
 677
 678                 /* now we recursivly parse that. */
 679         int r = parseExpression(res, tokens.begin(), tokens.end());
 680
 681         if (res)
 682                 res->m_sort = sort;
 683
 684         eDebug("return: %d", r);
 685         return r;
 686 }
 687
 688 DEFINE_REF(eDVBChannelQuery);