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

   1 #include <lib/dvb/idvb.h>
   2 #include <lib/dvb_si/sdt.h>
   3 #include <lib/dvb_si/nit.h>
   4 #include <lib/dvb_si/bat.h>
   5 #include <lib/dvb_si/descriptor_tag.h>
   6 #include <lib/dvb_si/service_descriptor.h>
   7 #include <lib/dvb_si/satellite_delivery_system_descriptor.h>
   8 #include <lib/dvb_si/ca_identifier_descriptor.h>
   9 #include <lib/dvb/specs.h>
  10 #include <lib/dvb/esection.h>
  11 #include <lib/dvb/scan.h>
  12 #include <lib/dvb/frontend.h>
  13 #include <lib/base/eerror.h>
  14 #include <errno.h>
  15
  16 #define SCAN_eDebug(x...)
  17 #define SCAN_eDebugNoNewLine(x...)
  18
  19 DEFINE_REF(eDVBScan);
  20
  21 eDVBScan::eDVBScan(iDVBChannel *channel): m_channel(channel)
  22 {
  23         if (m_channel->getDemux(m_demux))
  24                 SCAN_eDebug("scan: failed to allocate demux!");
  25         m_channel->connectStateChange(slot(*this, &eDVBScan::stateChange), m_stateChanged_connection);
  26 }
  27
  28 eDVBScan::~eDVBScan()
  29 {
  30 }
  31
  32 int eDVBScan::isValidONIDTSID(eOriginalNetworkID onid, eTransportStreamID tsid)
  33 {
  34         switch (onid.get())
  35         {
  36         case 0:
  37         case 0xFFFF:
  38         case 0x1111:
  39                 return 0;
  40         case 1:
  41                 return tsid>1;
  42         case 0x00B1:
  43                 return tsid != 0x00B0;
  44         case 0x0002:
  45                 return tsid != 0x07E8;
  46         default:
  47                 return 1;
  48         }
  49 }
  50
  51 eDVBNamespace eDVBScan::buildNamespace(eOriginalNetworkID onid, eTransportStreamID tsid, unsigned long hash)
  52 {
  53                 // on valid ONIDs, ignore frequency ("sub network") part
  54         if (isValidONIDTSID(onid, tsid))
  55                 hash &= ~0xFFFF;
  56         return eDVBNamespace(hash);
  57 }
  58
  59 void eDVBScan::stateChange(iDVBChannel *ch)
  60 {
  61         int state;
  62         if (ch->getState(state))
  63                 return;
  64         if (m_channel_state == state)
  65                 return;
  66
  67         if (state == iDVBChannel::state_ok)
  68         {
  69                 startFilter();
  70                 m_channel_state = state;
  71         } else if (state == iDVBChannel::state_unavailable)
  72         {
  73                 m_ch_unavailable.push_back(m_ch_current);
  74                 nextChannel();
  75         }
  76 }
  77
  78 RESULT eDVBScan::nextChannel()
  79 {
  80         ePtr<iDVBFrontend> fe;
  81
  82         m_SDT = 0; m_BAT = 0; m_NIT = 0;
  83
  84         m_ready = readyBAT;
  85         if (m_ch_toScan.empty())
  86         {
  87                 eDebug("no channels left to scan.");
  88                 eDebug("%d channels scanned, %d were unavailable.",
  89                                 m_ch_scanned.size(), m_ch_unavailable.size());
  90                 eDebug("%d channels in database.", m_new_channels.size());
  91                 m_event(evtFinish);
  92                 return -ENOENT;
  93         }
  94
  95         m_ch_current = m_ch_toScan.front();
  96         m_ch_toScan.pop_front();
  97
  98         if (m_channel->getFrontend(fe))
  99                 return -ENOTSUP;
 100
 101         m_channel_state = iDVBChannel::state_idle;
 102         if (fe->tune(*m_ch_current))
 103                 return -EINVAL;
 104
 105         m_event(evtUpdate);
 106         return 0;
 107 }
 108
 109 RESULT eDVBScan::startFilter()
 110 {
 111         assert(m_demux);
 112
 113         m_SDT = new eTable<ServiceDescriptionTable>();
 114         if (m_SDT->start(m_demux, eDVBSDTSpec()))
 115                 return -1;
 116         CONNECT(m_SDT->tableReady, eDVBScan::SDTready);
 117
 118         m_NIT = 0;
 119         m_NIT = new eTable<NetworkInformationTable>();
 120         if (m_NIT->start(m_demux, eDVBNITSpec()))
 121                 return -1;
 122         CONNECT(m_NIT->tableReady, eDVBScan::NITready);
 123
 124         m_BAT = new eTable<BouquetAssociationTable>();
 125         if (m_BAT->start(m_demux, eDVBBATSpec()))
 126                 return -1;
 127         CONNECT(m_BAT->tableReady, eDVBScan::BATready);
 128
 129         return 0;
 130 }
 131
 132 void eDVBScan::SDTready(int err)
 133 {
 134         SCAN_eDebug("got sdt");
 135         m_ready |= readySDT;
 136         if (!err)
 137                 m_ready |= validSDT;
 138         channelDone();
 139 }
 140
 141 void eDVBScan::NITready(int err)
 142 {
 143         SCAN_eDebug("got nit, err %d", err);
 144         m_ready |= readyNIT;
 145         if (!err)
 146                 m_ready |= validNIT;
 147         channelDone();
 148 }
 149
 150 void eDVBScan::BATready(int err)
 151 {
 152         SCAN_eDebug("got bat");
 153         m_ready |= readyBAT;
 154         if (!err)
 155                 m_ready |= validBAT;
 156         channelDone();
 157 }
 158
 159 void eDVBScan::addChannel(const eDVBChannelID &chid, iDVBFrontendParameters *feparm)
 160 {
 161                 /* add it to the list of known channels. */
 162         if (chid)
 163                 m_new_channels.insert(std::pair<eDVBChannelID,ePtr<iDVBFrontendParameters> >(chid, feparm));
 164
 165                 /* check if we don't already have that channel ... */
 166
 167                 /* ... in the list of channels to scan */
 168         for (std::list<ePtr<iDVBFrontendParameters> >::const_iterator i(m_ch_toScan.begin()); i != m_ch_toScan.end(); ++i)
 169                 if (sameChannel(*i, feparm))
 170                         return;
 171
 172                 /* ... in the list of successfully scanned channels */
 173         for (std::list<ePtr<iDVBFrontendParameters> >::const_iterator i(m_ch_scanned.begin()); i != m_ch_scanned.end(); ++i)
 174                 if (sameChannel(*i, feparm))
 175                         return;
 176
 177                 /* ... in the list of unavailable channels */
 178         for (std::list<ePtr<iDVBFrontendParameters> >::const_iterator i(m_ch_unavailable.begin()); i != m_ch_unavailable.end(); ++i)
 179                 if (sameChannel(*i, feparm))
 180                         return;
 181
 182                 /* ... on the current channel */
 183         if (sameChannel(m_ch_current, feparm))
 184                 return;
 185
 186                 /* otherwise, add it to the todo list. */
 187         m_ch_toScan.push_back(feparm);
 188 }
 189
 190 int eDVBScan::sameChannel(iDVBFrontendParameters *ch1, iDVBFrontendParameters *ch2) const
 191 {
 192         int diff;
 193         if (ch1->calculateDifference(ch2, diff))
 194                 return 0;
 195         if (diff < 4000) // more than 4mhz difference?
 196                 return 1;
 197         return 0;
 198 }
 199
 200 void eDVBScan::channelDone()
 201 {
 202         if (m_ready & validSDT)
 203         {
 204                 unsigned long hash = 0;
 205                 m_ch_current->getHash(hash);
 206
 207                 eDVBNamespace dvbnamespace = buildNamespace(
 208                         (**m_SDT->getSections().begin()).getOriginalNetworkId(),
 209                         (**m_SDT->getSections().begin()).getTransportStreamId(),
 210                         hash);
 211
 212                 SCAN_eDebug("SDT: ");
 213                 ServiceDescriptionTableConstIterator i;
 214                 for (i = m_SDT->getSections().begin(); i != m_SDT->getSections().end(); ++i)
 215                         processSDT(dvbnamespace, **i);
 216                 m_ready &= ~validSDT;
 217         }
 218
 219         if (m_ready & validNIT)
 220         {
 221                 SCAN_eDebug("dumping NIT");
 222                 NetworkInformationTableConstIterator i;
 223                 for (i = m_NIT->getSections().begin(); i != m_NIT->getSections().end(); ++i)
 224                 {
 225                         const TransportStreamInfoVector &tsinfovec = *(*i)->getTsInfo();
 226
 227                         for (TransportStreamInfoConstIterator tsinfo(tsinfovec.begin());
 228                                 tsinfo != tsinfovec.end(); ++tsinfo)
 229                         {
 230                                 SCAN_eDebug("TSID: %04x ONID: %04x", (*tsinfo)->getTransportStreamId(),
 231                                         (*tsinfo)->getOriginalNetworkId());
 232
 233                                 eOriginalNetworkID onid = (*tsinfo)->getOriginalNetworkId();
 234                                 eTransportStreamID tsid = (*tsinfo)->getTransportStreamId();
 235
 236                                 for (DescriptorConstIterator desc = (*tsinfo)->getDescriptors()->begin();
 237                                                 desc != (*tsinfo)->getDescriptors()->end(); ++desc)
 238                                 {
 239                                         switch ((*desc)->getTag())
 240                                         {
 241 //                                      case SERVICE_LIST_DESCRIPTOR:
 242                                         case SATELLITE_DELIVERY_SYSTEM_DESCRIPTOR:
 243                                         {
 244                                                 SatelliteDeliverySystemDescriptor &d = (SatelliteDeliverySystemDescriptor&)**desc;
 245                                                 SCAN_eDebug("%d kHz, %d%d%d.%d%c %s MOD:%d %d symb/s, fec %d",
 246                                                                 d.getFrequency(),
 247                                                                 (d.getOrbitalPosition()>>12)&0xF,
 248                                                                 (d.getOrbitalPosition()>>8)&0xF,
 249                                                                 (d.getOrbitalPosition()>>4)&0xF,
 250                                                                 d.getOrbitalPosition()&0xF, d.getWestEastFlag()?'E':'W',
 251                                                                 d.getPolarization() ? "hor" : "vert",
 252                                                                 d.getModulation(), d.getSymbolRate(), d.getFecInner());
 253
 254                                                         /* some sanity checking: below 100MHz is invalid */
 255                                                 if (d.getFrequency() < 10000)
 256                                                         break;
 257
 258                                                 ePtr<eDVBFrontendParameters> feparm = new eDVBFrontendParameters;
 259                                                 eDVBFrontendParametersSatellite sat;
 260                                                 sat.set(d);
 261                                                 feparm->setDVBS(sat);
 262                                                 unsigned long hash=0;
 263                                                 feparm->getHash(hash);
 264
 265                                                 eDVBNamespace ns = buildNamespace(onid, tsid, hash);
 266
 267                                                 addChannel(
 268                                                                 eDVBChannelID(ns, tsid, onid),
 269                                                                 feparm);
 270                                                 break;
 271                                         }
 272                                         default:
 273                                                 SCAN_eDebug("descr<%x>", (*desc)->getTag());
 274                                                 break;
 275                                         }
 276                                 }
 277
 278                         }
 279                 }
 280                 m_ready &= ~validNIT;
 281         }
 282
 283         if ((m_ready  & readyAll) != readyAll)
 284                 return;
 285         SCAN_eDebug("channel done!");
 286         m_ch_scanned.push_back(m_ch_current);
 287         nextChannel();
 288 }
 289
 290 void eDVBScan::start(const std::list<ePtr<iDVBFrontendParameters> > &known_transponders)
 291 {
 292         m_ch_toScan.clear();
 293         m_ch_scanned.clear();
 294         m_ch_unavailable.clear();
 295         m_new_channels.clear();
 296         m_new_services.clear();
 297         m_ch_toScan.insert(m_ch_toScan.end(), known_transponders.begin(), known_transponders.end());
 298         nextChannel();
 299 }
 300
 301 void eDVBScan::insertInto(eDVBDB *db)
 302 {
 303         for (std::map<eDVBChannelID, ePtr<iDVBFrontendParameters> >::const_iterator
 304                         ch(m_new_channels.begin()); ch != m_new_channels.end(); ++ch)
 305                 db->addChannelToList(ch->first, ch->second);
 306         for (std::map<eServiceReferenceDVB, ePtr<eDVBService> >::const_iterator
 307                 service(m_new_services.begin()); service != m_new_services.end(); ++service)
 308         {
 309                 ePtr<eDVBService> dvb_service;
 310                 if (!db->getService(service->first, dvb_service))
 311                         *dvb_service = *service->second;
 312                 else
 313                         db->addService(service->first, service->second);
 314         }
 315 }
 316
 317 RESULT eDVBScan::processSDT(eDVBNamespace dvbnamespace, const ServiceDescriptionTable &sdt)
 318 {
 319         const ServiceDescriptionVector &services = *sdt.getDescriptions();
 320         SCAN_eDebug("ONID: %04x", sdt.getOriginalNetworkId());
 321         eDVBChannelID chid(dvbnamespace, sdt.getTransportStreamId(), sdt.getOriginalNetworkId());
 322
 323         for (ServiceDescriptionConstIterator s(services.begin()); s != services.end(); ++s)
 324         {
 325                 SCAN_eDebugNoNewLine("SID %04x: ", (*s)->getServiceId());
 326
 327                 eServiceReferenceDVB ref;
 328                 ePtr<eDVBService> service = new eDVBService;
 329
 330                 ref.set(chid);
 331                 ref.setServiceID((*s)->getServiceId());
 332
 333                 for (DescriptorConstIterator desc = (*s)->getDescriptors()->begin();
 334                                 desc != (*s)->getDescriptors()->end(); ++desc)
 335                         if ((*desc)->getTag() == SERVICE_DESCRIPTOR)
 336                                 ref.setServiceType(((ServiceDescriptor&)**desc).getServiceType());
 337
 338                 for (DescriptorConstIterator desc = (*s)->getDescriptors()->begin();
 339                                 desc != (*s)->getDescriptors()->end(); ++desc)
 340                 {
 341                         switch ((*desc)->getTag())
 342                         {
 343                         case SERVICE_DESCRIPTOR:
 344                         {
 345                                 ServiceDescriptor &d = (ServiceDescriptor&)**desc;
 346                                 SCAN_eDebug("name '%s', provider_name '%s'", d.getServiceName().c_str(), d.getServiceProviderName().c_str());
 347                                 service->m_service_name = d.getServiceName();
 348                                 service->m_provider_name = d.getServiceProviderName();
 349                                 break;
 350                         }
 351                         case CA_IDENTIFIER_DESCRIPTOR:
 352                         {
 353                                 CaIdentifierDescriptor &d = (CaIdentifierDescriptor&)**desc;
 354                                 const CaSystemIdVector &caids = *d.getCaSystemIds();
 355                                 SCAN_eDebugNoNewLine("CA ");
 356                                 for (CaSystemIdVector::const_iterator i(caids.begin()); i != caids.end(); ++i)
 357                                 {
 358                                         SCAN_eDebugNoNewLine("%04x ", *i);
 359                                         service->m_ca.insert(*i);
 360                                 }
 361                                 SCAN_eDebug("");
 362                                 break;
 363                         }
 364                         default:
 365                                 SCAN_eDebug("descr<%x>", (*desc)->getTag());
 366                                 break;
 367                         }
 368                 }
 369
 370                 m_new_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(ref, service));
 371         }
 372         return 0;
 373 }
 374
 375 RESULT eDVBScan::connectEvent(const Slot1<void,int> &event, ePtr<eConnection> &connection)
 376 {
 377         connection = new eConnection(this, m_event.connect(event));
 378         return 0;
 379 }