summaryrefslogtreecommitdiff
path: root/eit.c
blob: 702a8e89b266ef0cf88d8f5adfa6a5763b2066ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/*
 * eit.c: EIT section filter
 *
 * See the main source file 'vdr.c' for copyright information and
 * how to reach the author.
 *
 * Original version (as used in VDR before 1.3.0) written by
 * Robert Schneider <Robert.Schneider@web.de> and Rolf Hakenes <hakenes@hippomi.de>.
 * Adapted to 'libsi' for VDR 1.3.0 by Marcel Wiesweg <marcel.wiesweg@gmx.de>.
 *
 * $Id: eit.c 1.110 2005/08/13 13:27:34 kls Exp $
 */

#include "eit.h"
#include "epg.h"
#include "i18n.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"

// --- cEIT ------------------------------------------------------------------

class cEIT : public SI::EIT {
public:
  cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data);
  };

cEIT::cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data)
:SI::EIT(Data, false)
{
  if (!CheckCRCAndParse())
     return;

  tChannelID channelID(Source, getOriginalNetworkId(), getTransportStreamId(), getServiceId());
  cChannel *channel = Channels.GetByChannelID(channelID, true);
  if (!channel)
     return; // only collect data for known channels

  cSchedule *pSchedule = (cSchedule *)Schedules->GetSchedule(channelID);
  if (!pSchedule) {
     pSchedule = new cSchedule(channelID);
     Schedules->Add(pSchedule);
     }

  bool Empty = true;
  bool Modified = false;

  SI::EIT::Event SiEitEvent;
  for (SI::Loop::Iterator it; eventLoop.getNext(SiEitEvent, it); ) {
      // Drop bogus events - but keep NVOD reference events, where all bits of the start time field are set to 1, resulting in a negative number.
      if (SiEitEvent.getStartTime() == 0 || SiEitEvent.getStartTime() > 0 && SiEitEvent.getDuration() == 0)
         continue;
      Empty = false;
      cEvent *newEvent = NULL;
      cEvent *rEvent = NULL;
      cEvent *pEvent = (cEvent *)pSchedule->GetEvent(SiEitEvent.getEventId(), SiEitEvent.getStartTime());
      if (!pEvent) {
         // If we don't have that event yet, we create a new one.
         // Otherwise we copy the information into the existing event anyway, because the data might have changed.
         pEvent = newEvent = new cEvent(SiEitEvent.getEventId());
         if (!pEvent)
            continue;
         }
      else {
         // We have found an existing event, either through its event ID or its start time.
         pEvent->SetSeen();
         // If the existing event has a zero table ID it was defined externally and shall
         // not be overwritten.
         if (pEvent->TableID() == 0x00)
            continue;
         // If the new event has a higher table ID, let's skip it.
         // The lower the table ID, the more "current" the information.
         if (Tid > pEvent->TableID())
            continue;
         // If the new event comes from the same table and has the same version number
         // as the existing one, let's skip it to avoid unnecessary work.
         // Unfortunately some stations (like, e.g. "Premiere") broadcast their EPG data on several transponders (like
         // the actual Premiere transponder and the Sat.1/Pro7 transponder), but use different version numbers on
         // each of them :-( So if one DVB card is tuned to the Premiere transponder, while an other one is tuned
         // to the Sat.1/Pro7 transponder, events will keep toggling because of the bogus version numbers.
         if (Tid == pEvent->TableID() && pEvent->Version() == getVersionNumber())
            continue;
         }
      // XXX TODO log different (non-zero) event IDs for the same event???
      pEvent->SetEventID(SiEitEvent.getEventId()); // unfortunately some stations use different event ids for the same event in different tables :-(
      pEvent->SetTableID(Tid);
      pEvent->SetVersion(getVersionNumber());
      pEvent->SetStartTime(SiEitEvent.getStartTime());
      pEvent->SetDuration(SiEitEvent.getDuration());

      int LanguagePreferenceShort = -1;
      int LanguagePreferenceExt = -1;
      bool UseExtendedEventDescriptor = false;
      SI::Descriptor *d;
      SI::ExtendedEventDescriptors *ExtendedEventDescriptors = NULL;
      SI::ShortEventDescriptor *ShortEventDescriptor = NULL;
      cLinkChannels *LinkChannels = NULL;
      cComponents *Components = NULL;
      for (SI::Loop::Iterator it2; (d = SiEitEvent.eventDescriptors.getNext(it2)); ) {
          switch (d->getDescriptorTag()) {
            case SI::ExtendedEventDescriptorTag: {
                 SI::ExtendedEventDescriptor *eed = (SI::ExtendedEventDescriptor *)d;
                 if (I18nIsPreferredLanguage(Setup.EPGLanguages, I18nLanguageIndex(eed->languageCode), LanguagePreferenceExt) || !ExtendedEventDescriptors) {
                    delete ExtendedEventDescriptors;
                    ExtendedEventDescriptors = new SI::ExtendedEventDescriptors;
                    UseExtendedEventDescriptor = true;
                    }
                 if (UseExtendedEventDescriptor) {
                    ExtendedEventDescriptors->Add(eed);
                    d = NULL; // so that it is not deleted
                    }
                 if (eed->getDescriptorNumber() == eed->getLastDescriptorNumber())
                    UseExtendedEventDescriptor = false;
                 }
                 break;
            case SI::ShortEventDescriptorTag: {
                 SI::ShortEventDescriptor *sed = (SI::ShortEventDescriptor *)d;
                 if (I18nIsPreferredLanguage(Setup.EPGLanguages, I18nLanguageIndex(sed->languageCode), LanguagePreferenceShort) || !ShortEventDescriptor) {
                    delete ShortEventDescriptor;
                    ShortEventDescriptor = sed;
                    d = NULL; // so that it is not deleted
                    }
                 }
                 break;
            case SI::ContentDescriptorTag:
                 break;
            case SI::ParentalRatingDescriptorTag:
                 break;
            case SI::PDCDescriptorTag: {
                 SI::PDCDescriptor *pd = (SI::PDCDescriptor *)d;
                 time_t now = time(NULL);
                 struct tm tm_r;
                 struct tm t = *localtime_r(&now, &tm_r); // this initializes the time zone in 't'
                 t.tm_isdst = -1; // makes sure mktime() will determine the correct DST setting
                 int month = t.tm_mon;
                 t.tm_mon = pd->getMonth() - 1;
                 t.tm_mday = pd->getDay();
                 t.tm_hour = pd->getHour();
                 t.tm_min = pd->getMinute();
                 t.tm_sec = 0;
                 if (month == 11 && t.tm_mon == 0) // current month is dec, but event is in jan
                    t.tm_year++;
                 else if (month == 0 && t.tm_mon == 11) // current month is jan, but event is in dec
                    t.tm_year--;
                 time_t vps = mktime(&t);
                 pEvent->SetVps(vps);
                 }
                 break;
            case SI::TimeShiftedEventDescriptorTag: {
                 SI::TimeShiftedEventDescriptor *tsed = (SI::TimeShiftedEventDescriptor *)d;
                 cSchedule *rSchedule = (cSchedule *)Schedules->GetSchedule(tChannelID(Source, channel->Nid(), channel->Tid(), tsed->getReferenceServiceId()));
                 if (!rSchedule)
                    break;
                 rEvent = (cEvent *)rSchedule->GetEvent(tsed->getReferenceEventId());
                 if (!rEvent)
                    break;
                 pEvent->SetTitle(rEvent->Title());
                 pEvent->SetShortText(rEvent->ShortText());
                 pEvent->SetDescription(rEvent->Description());
                 }
                 break;
            case SI::LinkageDescriptorTag: {
                 SI::LinkageDescriptor *ld = (SI::LinkageDescriptor *)d;
                 tChannelID linkID(Source, ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId());
                 if (ld->getLinkageType() == 0xB0) { // Premiere World
                    time_t now = time(NULL);
                    bool hit = SiEitEvent.getStartTime() <= now && now < SiEitEvent.getStartTime() + SiEitEvent.getDuration();
                    if (hit) {
                       char linkName[ld->privateData.getLength() + 1];
                       strn0cpy(linkName, (const char *)ld->privateData.getData(), sizeof(linkName));
                       cChannel *link = Channels.GetByChannelID(linkID);
                       if (link != channel) { // only link to other channels, not the same one
                          //fprintf(stderr, "Linkage %s %4d %4d %5d %5d %5d %5d  %02X  '%s'\n", hit ? "*" : "", channel->Number(), link ? link->Number() : -1, SiEitEvent.getEventId(), ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId(), ld->getLinkageType(), linkName);//XXX
                          if (link) {
                             if (Setup.UpdateChannels >= 1)
                                link->SetName(linkName, "", "");
                             }
                          else if (Setup.UpdateChannels >= 3) {
                             link = Channels.NewChannel(channel, linkName, "", "", ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId());
                             //XXX patFilter->Trigger();
                             }
                          if (link) {
                             if (!LinkChannels)
                                LinkChannels = new cLinkChannels;
                             LinkChannels->Add(new cLinkChannel(link));
                             }
                          }
                       else
                          channel->SetPortalName(linkName);
                       }
                    }
                 }
                 break;
            case SI::ComponentDescriptorTag: {
                 SI::ComponentDescriptor *cd = (SI::ComponentDescriptor *)d;
                 uchar Stream = cd->getStreamContent();
                 uchar Type = cd->getComponentType();
                 if (1 <= Stream && Stream <= 2 && Type != 0) {
                    if (!Components)
                       Components = new cComponents;
                    char buffer[256];
                    Components->SetComponent(Components->NumComponents(), cd->getStreamContent(), cd->getComponentType(), I18nNormalizeLanguageCode(cd->languageCode), cd->description.getText(buffer, sizeof(buffer)));
                    }
                 }
                 break;
            default: ;
            }
          delete d;
          }

      if (!rEvent) {
         if (ShortEventDescriptor) {
            char buffer[256];
            pEvent->SetTitle(ShortEventDescriptor->name.getText(buffer, sizeof(buffer)));
            pEvent->SetShortText(ShortEventDescriptor->text.getText(buffer, sizeof(buffer)));
            }
         if (ExtendedEventDescriptors) {
            char buffer[ExtendedEventDescriptors->getMaximumTextLength(": ") + 1];
            pEvent->SetDescription(ExtendedEventDescriptors->getText(buffer, sizeof(buffer), ": "));
            }
         }
      delete ExtendedEventDescriptors;
      delete ShortEventDescriptor;

      if (newEvent)
         pSchedule->AddEvent(newEvent);

      pEvent->SetComponents(Components);

      pEvent->FixEpgBugs();
      if (LinkChannels)
         channel->SetLinkChannels(LinkChannels);
      if (Tid == 0x4E) { // we trust only the present/following info on the actual TS
         if (SiEitEvent.getRunningStatus() >= SI::RunningStatusNotRunning)
            pSchedule->SetRunningStatus(pEvent, SiEitEvent.getRunningStatus(), channel);
         }
      Modified = true;
      }
  if (Empty && Tid == 0x4E && getSectionNumber() == 0)
     // ETR 211: an empty entry in section 0 of table 0x4E means there is currently no event running
     pSchedule->ClrRunningStatus(channel);
  if (Tid == 0x4E)
     pSchedule->SetPresentSeen();
  if (Modified) {
     pSchedule->Sort();
     Schedules->SetModified(pSchedule);
     }
}

// --- cTDT ------------------------------------------------------------------

class cTDT : public SI::TDT {
private:
  static cMutex mutex;
  static int lastDiff;
public:
  cTDT(const u_char *Data);
  };

cMutex cTDT::mutex;
int cTDT::lastDiff = 0;

cTDT::cTDT(const u_char *Data)
:SI::TDT(Data, false)
{
  CheckParse();

  time_t sattim = getTime();
  time_t loctim = time(NULL);

  int diff = abs(sattim - loctim);
  if (diff > 2) {
     mutex.Lock();
     if (abs(diff - lastDiff) < 3) {
        isyslog("System Time = %s (%ld)\n", *TimeToString(loctim), loctim);
        isyslog("Local Time  = %s (%ld)\n", *TimeToString(sattim), sattim);
        if (stime(&sattim) < 0)
           esyslog("ERROR while setting system time: %m");
        }
     lastDiff = diff;
     mutex.Unlock();
     }
}

// --- cEitFilter ------------------------------------------------------------

cEitFilter::cEitFilter(void)
{
  Set(0x12, 0x4E, 0xFE);  // event info, actual(0x4E)/other(0x4F) TS, present/following
  Set(0x12, 0x50, 0xF0);  // event info, actual TS, schedule(0x50)/schedule for future days(0x5X)
  Set(0x12, 0x60, 0xF0);  // event info, other  TS, schedule(0x60)/schedule for future days(0x6X)
  Set(0x14, 0x70);        // TDT
}

void cEitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
  switch (Pid) {
    case 0x12: {
         cSchedulesLock SchedulesLock(true, 10);
         cSchedules *Schedules = (cSchedules *)cSchedules::Schedules(SchedulesLock);
         if (Schedules)
            cEIT EIT(Schedules, Source(), Tid, Data);
         }
         break;
    case 0x14: {
         if (Setup.SetSystemTime && Setup.TimeTransponder && ISTRANSPONDER(Transponder(), Setup.TimeTransponder))
            cTDT TDT(Data);
         }
         break;
    }
}