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