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 <lib/dvb_si/sdt.h>
   7 #include <lib/dvb_si/descriptor_tag.h>
   8 #include <lib/dvb_si/service_descriptor.h>
   9 #include <lib/dvb_si/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_provider_name = s.m_provider_name;
  25         m_flags = s.m_flags;
  26         m_ca = s.m_ca;
  27         m_cache = s.m_cache;
  28         return *this;
  29 }
  30
  31 RESULT eDVBService::getName(const eServiceReference &ref, std::string &name)
  32 {
  33         name = convertDVBUTF8(m_service_name);
  34         return 0;
  35 }
  36
  37 int eDVBService::getLength(const eServiceReference &ref)
  38 {
  39         return -1;
  40 }
  41
  42 int eDVBService::checkFilter(const eServiceReferenceDVB &ref, const eDVBChannelQuery &query)
  43 {
  44         int res = 0;
  45         switch (query.m_type)
  46         {
  47         case eDVBChannelQuery::tName:
  48                 res = m_service_name.find(query.m_string) != std::string::npos;
  49                 break;
  50         case eDVBChannelQuery::tProvider:
  51                 res = m_provider_name.find(query.m_string) != std::string::npos;
  52                 break;
  53         case eDVBChannelQuery::tType:
  54                 res = ref.getServiceType() == query.m_int;
  55                 break;
  56         case eDVBChannelQuery::tBouquet:
  57                 res = 0;
  58                 break;
  59         case eDVBChannelQuery::tSatellitePosition:
  60                 res = (ref.getDVBNamespace().get() >> 16) == query.m_int;
  61                 break;
  62         case eDVBChannelQuery::tChannelID:
  63         {
  64                 eDVBChannelID chid;
  65                 ref.getChannelID(chid);
  66                 res = chid == query.m_channelid;
  67                 break;
  68         }
  69         case eDVBChannelQuery::tAND:
  70                 res = checkFilter(ref, *query.m_p1) && checkFilter(ref, *query.m_p2);
  71                 break;
  72         case eDVBChannelQuery::tOR:
  73                 res = checkFilter(ref, *query.m_p1) || checkFilter(ref, *query.m_p2);
  74                 break;
  75         }
  76
  77         if (query.m_inverse)
  78                 return !res;
  79         else
  80                 return res;
  81 }
  82
  83 int eDVBService::getCachePID(cacheID id)
  84 {
  85         std::map<int, int>::iterator it = m_cache.find(id);
  86         if ( it != m_cache.end() )
  87                 return it->second;
  88         return -1;
  89 }
  90
  91 void eDVBService::setCachePID(cacheID id, int pid)
  92 {
  93         m_cache[id] = pid;
  94 }
  95
  96 DEFINE_REF(eDVBDB);
  97
  98 void eDVBDB::load()
  99 {
 100         eDebug("---- opening lame channel db");
 101         FILE *f=fopen("lamedb", "rt");
 102         if (!f)
 103                 return;
 104         char line[256];
 105         if ((!fgets(line, 256, f)) || strncmp(line, "eDVB services", 13))
 106         {
 107                 eDebug("not a servicefile");
 108                 fclose(f);
 109                 return;
 110         }
 111         eDebug("reading services");
 112         if ((!fgets(line, 256, f)) || strcmp(line, "transponders\n"))
 113         {
 114                 eDebug("services invalid, no transponders");
 115                 fclose(f);
 116                 return;
 117         }
 118
 119         // clear all transponders
 120
 121         while (!feof(f))
 122         {
 123                 if (!fgets(line, 256, f))
 124                         break;
 125                 if (!strcmp(line, "end\n"))
 126                         break;
 127                 int dvb_namespace=-1, transport_stream_id=-1, original_network_id=-1;
 128                 sscanf(line, "%x:%x:%x", &dvb_namespace, &transport_stream_id, &original_network_id);
 129                 if (original_network_id == -1)
 130                         continue;
 131                 eDVBChannelID channelid = eDVBChannelID(
 132                         eDVBNamespace(dvb_namespace),
 133                         eTransportStreamID(transport_stream_id),
 134                         eOriginalNetworkID(original_network_id));
 135
 136                 ePtr<eDVBFrontendParameters> feparm = new eDVBFrontendParameters;
 137                 while (!feof(f))
 138                 {
 139                         fgets(line, 256, f);
 140                         if (!strcmp(line, "/\n"))
 141                                 break;
 142                         if (line[1]=='s')
 143                         {
 144                                 eDVBFrontendParametersSatellite sat;
 145                                 int frequency, symbol_rate, polarisation, fec, orbital_position, inversion;
 146                                 sscanf(line+2, "%d:%d:%d:%d:%d:%d", &frequency, &symbol_rate, &polarisation, &fec, &inversion, &orbital_position);
 147                                 sat.frequency = frequency;
 148                                 sat.symbol_rate = symbol_rate;
 149                                 sat.polarisation = polarisation;
 150                                 sat.fec = fec;
 151                                 sat.orbital_position = orbital_position;
 152                                 sat.inversion = inversion;
 153                                 // ...
 154 //                              t.setSatellite(frequency, symbol_rate, polarisation, fec, sat, inversion);
 155                                 feparm->setDVBS(sat);
 156                         }
 157                         if (line[1]=='c')
 158                         {
 159                                 int frequency, symbol_rate, inversion=0, modulation=3;
 160                                 sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);
 161 //                              t.setCable(frequency, symbol_rate, inversion, modulation);
 162                         }
 163                 }
 164                 addChannelToList(channelid, feparm);
 165         }
 166
 167         if ((!fgets(line, 256, f)) || strcmp(line, "services\n"))
 168         {
 169                 eDebug("services invalid, no services");
 170                 return;
 171         }
 172
 173         // clear all services
 174
 175         int count=0;
 176
 177         while (!feof(f))
 178         {
 179                 if (!fgets(line, 256, f))
 180                         break;
 181                 if (!strcmp(line, "end\n"))
 182                         break;
 183
 184                 int service_id=-1, dvb_namespace, transport_stream_id=-1, original_network_id=-1, service_type=-1, service_number=-1;
 185                 sscanf(line, "%x:%x:%x:%x:%d:%d", &service_id, &dvb_namespace, &transport_stream_id, &original_network_id, &service_type, &service_number);
 186                 if (service_number == -1)
 187                         continue;
 188                 ePtr<eDVBService> s = new eDVBService;
 189                 eServiceReferenceDVB ref =
 190                                                 eServiceReferenceDVB(
 191                                                 eDVBNamespace(dvb_namespace),
 192                                                 eTransportStreamID(transport_stream_id),
 193                                                 eOriginalNetworkID(original_network_id),
 194                                                 eServiceID(service_id),
 195                                                 service_type);
 196                 count++;
 197                 fgets(line, 256, f);
 198                 if (strlen(line))
 199                         line[strlen(line)-1]=0;
 200                 s->m_service_name=line;
 201                 fgets(line, 256, f);
 202                 if (strlen(line))
 203                         line[strlen(line)-1]=0;
 204
 205                 std::string str=line;
 206
 207                 if (str[1]!=':')        // old ... (only service_provider)
 208                 {
 209                         s->m_provider_name=line;
 210                 } else
 211                         while ((!str.empty()) && str[1]==':') // new: p:, f:, c:%02d...
 212                         {
 213                                 unsigned int c=str.find(',');
 214                                 char p=str[0];
 215                                 std::string v;
 216                                 if (c == std::string::npos)
 217                                 {
 218                                         v=str.substr(2);
 219                                         str="";
 220                                 } else
 221                                 {
 222                                         v=str.substr(2, c-2);
 223                                         str=str.substr(c+1);
 224                                 }
 225 //                              eDebug("%c ... %s", p, v.c_str());
 226                                 if (p == 'p')
 227                                         s->m_provider_name=v;
 228                                 else if (p == 'f')
 229                                 {
 230                                         sscanf(v.c_str(), "%x", &s->m_flags);
 231                                 } else if (p == 'c')
 232                                 {
 233                                         int cid, val;
 234                                         sscanf(v.c_str(), "%02d%04x", &cid, &val);
 235                                         s->m_cache[cid]=val;
 236                                 } else if (p == 'C')
 237                                 {
 238                                         int val;
 239                                         sscanf(v.c_str(), "%04x", &val);
 240                                         s->m_ca.insert(val);
 241                                 }
 242                         }
 243                 addService(ref, s);
 244         }
 245
 246         eDebug("loaded %d services", count);
 247
 248         fclose(f);
 249 }
 250
 251 void eDVBDB::save()
 252 {
 253         eDebug("---- saving lame channel db");
 254         FILE *f=fopen("lamedb", "wt");
 255         int channels=0, services=0;
 256         if (!f)
 257                 eFatal("couldn't save lame channel db!");
 258         fprintf(f, "eDVB services /3/\n");
 259         fprintf(f, "transponders\n");
 260         for (std::map<eDVBChannelID, channel>::const_iterator i(m_channels.begin());
 261                         i != m_channels.end(); ++i)
 262         {
 263                 const eDVBChannelID &chid = i->first;
 264                 const channel &ch = i->second;
 265
 266                 fprintf(f, "%08x:%04x:%04x\n", chid.dvbnamespace.get(),
 267                                 chid.transport_stream_id.get(), chid.original_network_id.get());
 268                 eDVBFrontendParametersSatellite sat;
 269                 if (!ch.m_frontendParameters->getDVBS(sat))
 270                 {
 271                         fprintf(f, "\ts %d:%d:%d:%d:%d:%d\n",
 272                                 sat.frequency, sat.symbol_rate,
 273                                 sat.polarisation, sat.fec, sat.inversion,
 274                                 sat.orbital_position);
 275                 }
 276                 fprintf(f, "/\n");
 277                 channels++;
 278         }
 279         fprintf(f, "end\nservices\n");
 280
 281         for (std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i(m_services.begin());
 282                 i != m_services.end(); ++i)
 283         {
 284                 const eServiceReferenceDVB &s = i->first;
 285                 fprintf(f, "%04x:%08x:%04x:%04x:%d:%d\n",
 286                                 s.getServiceID().get(), s.getDVBNamespace().get(),
 287                                 s.getTransportStreamID().get(),s.getOriginalNetworkID().get(),
 288                                 s.getServiceType(),
 289                                 0);
 290
 291                 fprintf(f, "%s\n", i->second->m_service_name.c_str());
 292                 fprintf(f, "p:%s", i->second->m_provider_name.c_str());
 293
 294                 // write cached pids
 295                 for (std::map<int,int>::const_iterator ca(i->second->m_cache.begin());
 296                         ca != i->second->m_cache.end(); ++ca)
 297                         fprintf(f, ",c:%02d%04x", ca->first, ca->second);
 298
 299                 // write cached ca pids
 300                 for (std::set<int>::const_iterator ca(i->second->m_ca.begin());
 301                         ca != i->second->m_ca.end(); ++ca)
 302                         fprintf(f, ",C:%04x", *ca);
 303
 304                 fprintf(f, "\n");
 305                 services++;
 306         }
 307         fprintf(f, "end\nHave a lot of bugs!\n");
 308         eDebug("saved %d channels and %d services!", channels, services);
 309         fclose(f);
 310 }
 311
 312 eDVBDB::eDVBDB()
 313 {
 314         load();
 315 }
 316
 317 eDVBDB::~eDVBDB()
 318 {
 319 //      save();
 320 }
 321
 322 RESULT eDVBDB::addChannelToList(const eDVBChannelID &id, iDVBFrontendParameters *feparm)
 323 {
 324         channel ch;
 325         assert(feparm);
 326         ch.m_frontendParameters = feparm;
 327         m_channels.insert(std::pair<eDVBChannelID, channel>(id, ch));
 328         return 0;
 329 }
 330
 331 RESULT eDVBDB::removeChannel(const eDVBChannelID &id)
 332 {
 333         m_channels.erase(id);
 334         return 0;
 335 }
 336
 337 RESULT eDVBDB::getChannelFrontendData(const eDVBChannelID &id, ePtr<iDVBFrontendParameters> &parm)
 338 {
 339         std::map<eDVBChannelID, channel>::iterator i = m_channels.find(id);
 340         if (i == m_channels.end())
 341         {
 342                 parm = 0;
 343                 return -ENOENT;
 344         }
 345         parm = i->second.m_frontendParameters;
 346         return 0;
 347 }
 348
 349 RESULT eDVBDB::addService(const eServiceReferenceDVB &serviceref, eDVBService *service)
 350 {
 351         m_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(serviceref, service));
 352         return 0;
 353 }
 354
 355 RESULT eDVBDB::getService(const eServiceReferenceDVB &reference, ePtr<eDVBService> &service)
 356 {
 357         std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i;
 358         i = m_services.find(reference);
 359         if (i == m_services.end())
 360         {
 361                 service = 0;
 362                 return -ENOENT;
 363         }
 364         service = i->second;
 365         return 0;
 366 }
 367
 368 RESULT eDVBDB::startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *q)
 369 {
 370         query = new eDVBDBQuery(this, eServiceReference(), q);
 371         return 0;
 372 }
 373
 374 DEFINE_REF(eDVBDBQuery);
 375
 376 eDVBDBQuery::eDVBDBQuery(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query): m_db(db), m_query(query)
 377 {
 378                 // TODO: use SOURCE ...
 379         m_cursor = m_db->m_services.begin();
 380 }
 381
 382 RESULT eDVBDBQuery::getNextResult(eServiceReferenceDVB &ref)
 383 {
 384         while (m_cursor != m_db->m_services.end())
 385         {
 386                 ref = m_cursor->first;
 387
 388                 int res = (!m_query) || m_cursor->second->checkFilter(ref, *m_query);
 389
 390                 ++m_cursor;
 391
 392                 if (res)
 393                         return 0;
 394         }
 395         return 1;
 396 }
 397
 398 /* (<name|provider|type|bouquet|satpos|chid> <==|...> <"string"|int>)[AND (..)] */
 399
 400         /* never, NEVER write a parser in C++! */
 401 RESULT parseExpression(ePtr<eDVBChannelQuery> &res, std::list<std::string>::const_iterator begin, std::list<std::string>::const_iterator end)
 402 {
 403         std::list<std::string>::const_iterator end_of_exp;
 404         if (*begin == "(")
 405         {
 406                 end_of_exp = begin;
 407                 while (end_of_exp != end)
 408                         if (*end_of_exp == ")")
 409                                 break;
 410                         else
 411                                 ++end_of_exp;
 412
 413                 if (end_of_exp == end)
 414                 {
 415                         eDebug("expression parse: end of expression while searching for closing brace");
 416                         return -1;
 417                 }
 418
 419                 ++begin;
 420                 // begin..end_of_exp
 421                 int r = parseExpression(res, begin, end_of_exp);
 422                 if (r)
 423                         return r;
 424                 ++end_of_exp;
 425
 426                         /* we had only one sub expression */
 427                 if (end_of_exp == end)
 428                         return 1;
 429
 430                         /* otherwise we have an operator here.. */
 431
 432                 ePtr<eDVBChannelQuery> r2 = res;
 433                 res = new eDVBChannelQuery();
 434                 res->m_p1 = r2;
 435                 res->m_inverse = 0;
 436                 r2 = 0;
 437
 438                 if (*end_of_exp == "||")
 439                         res->m_type = eDVBChannelQuery::tOR;
 440                 else if (*end_of_exp == "&&")
 441                         res->m_type = eDVBChannelQuery::tAND;
 442                 else
 443                 {
 444                         eDebug("found operator %s, but only && and || are allowed!", end_of_exp->c_str());
 445                         res = 0;
 446                         return 1;
 447                 }
 448
 449                 ++end_of_exp;
 450
 451                 return parseExpression(res->m_p2, end_of_exp, end);
 452         }
 453
 454         // "begin" <op> "end"
 455         std::string type, op, val;
 456
 457         res = new eDVBChannelQuery();
 458
 459         int cnt = 0;
 460         while (begin != end)
 461         {
 462                 switch (cnt)
 463                 {
 464                 case 0:
 465                         type = *begin;
 466                         break;
 467                 case 1:
 468                         op = *begin;
 469                         break;
 470                 case 2:
 471                         val = *begin;
 472                         break;
 473                 case 3:
 474                         eDebug("malformed query: got '%s', but expected only <type> <op> <val>", begin->c_str());
 475                         return 1;
 476                 }
 477                 ++begin;
 478                 ++cnt;
 479         }
 480
 481         if (cnt != 3)
 482         {
 483                 eDebug("malformed query: missing stuff");
 484                 res = 0;
 485                 return 1;
 486         }
 487
 488         if (type == "name")
 489                 res->m_type = eDVBChannelQuery::tName;
 490         else if (type == "provider")
 491                 res->m_type = eDVBChannelQuery::tProvider;
 492         else if (type == "type")
 493                 res->m_type = eDVBChannelQuery::tType;
 494         else if (type == "bouquet")
 495                 res->m_type = eDVBChannelQuery::tBouquet;
 496         else if (type == "satellitePosition")
 497                 res->m_type = eDVBChannelQuery::tSatellitePosition;
 498         else if (type == "channelID")
 499                 res->m_type = eDVBChannelQuery::tChannelID;
 500         else
 501         {
 502                 eDebug("malformed query: invalid type %s", type.c_str());
 503                 res = 0;
 504                 return 1;
 505         }
 506
 507         eDebug("type is %d, nice!", res->m_type);
 508
 509         if (op == "==")
 510                 res->m_inverse = 0;
 511         else if (op == "!=")
 512                 res->m_inverse = 1;
 513         else
 514         {
 515                 eDebug("invalid operator %s", op.c_str());
 516                 res = 0;
 517                 return 1;
 518         }
 519
 520         res->m_string = val;
 521         res->m_int = atoi(val.c_str());
 522 //      res->m_channelid = eDVBChannelID(val);
 523
 524         return 0;
 525 }
 526
 527 RESULT eDVBChannelQuery::compile(ePtr<eDVBChannelQuery> &res, std::string query)
 528 {
 529         std::list<std::string> tokens;
 530
 531         std::string current_token;
 532
 533 //      eDebug("splitting %s....", query.c_str());
 534         unsigned int i = 0;
 535         const char *splitchars="()";
 536         int quotemode = 0, lastsplit = 0, lastalnum = 0;
 537         while (i <= query.size())
 538         {
 539                 int c = (i < query.size()) ? query[i] : ' ';
 540                 ++i;
 541
 542                 int issplit = !!strchr(splitchars, c);
 543                 int isaln = isalnum(c);
 544                 int iswhite = c == ' ';
 545                 int isquot = c == '\"';
 546
 547                 if (quotemode)
 548                 {
 549                         iswhite = issplit = 0;
 550                         isaln = lastalnum;
 551                 }
 552
 553                 if (issplit || iswhite || isquot || lastsplit || (lastalnum != isaln))
 554                 {
 555                         if (current_token.size())
 556                                 tokens.push_back(current_token);
 557                         current_token.clear();
 558                 }
 559
 560                 if (!(iswhite || isquot))
 561                         current_token += c;
 562
 563                 if (isquot)
 564                         quotemode = !quotemode;
 565                 lastsplit = issplit;
 566                 lastalnum = isaln;
 567         }
 568
 569 //      for (std::list<std::string>::const_iterator a(tokens.begin()); a != tokens.end(); ++a)
 570 //      {
 571 //              printf("%s\n", a->c_str());
 572 //      }
 573
 574                 /* now we recursivly parse that. */
 575         return  parseExpression(res, tokens.begin(), tokens.end());
 576 /*
 577         res = new eDVBChannelQuery();
 578         res->m_type = eDVBChannelQuery::tName;
 579         res->m_inverse = 0;
 580         res->m_string = query;
 581         return 0; */
 582 }
 583
 584 DEFINE_REF(eDVBChannelQuery);