lib/dvb/esection.h

   1 #ifndef __esection_h
   2 #define __esection_h
   3
   4 #include <lib/dvb/idemux.h>
   5 #include <set>
   6
   7 #define TABLE_eDebug(x...) do { if (m_debug) eDebug(x); } while(0)
   8 #define TABLE_eDebugNoNewLine(x...) do { if (m_debug) eDebugNoNewLine(x); } while(0)
   9
  10 class eGTable: public iObject, public Object
  11 {
  12         DECLARE_REF(eGTable);
  13         ePtr<iDVBSectionReader> m_reader;
  14         eDVBTableSpec m_table;
  15
  16         unsigned int m_tries;
  17
  18         ePtr<eTimer> m_timeout;
  19
  20         void sectionRead(const __u8 *data);
  21         void timeout();
  22         ePtr<eConnection> m_sectionRead_conn;
  23 protected:
  24         bool m_debug;
  25         virtual int createTable(unsigned int nr, const __u8 *data, unsigned int max)=0;
  26 public:
  27         Signal1<void, int> tableReady;
  28         eGTable(bool debug=true);
  29         RESULT start(iDVBSectionReader *reader, const eDVBTableSpec &table);
  30         RESULT start(iDVBDemux *reader, const eDVBTableSpec &table);
  31         RESULT getSpec(eDVBTableSpec &spec) { spec = m_table; return 0; }
  32         virtual ~eGTable();
  33         int error;
  34         int ready;
  35 };
  36
  37 template <class Section>
  38 class eTable: public eGTable
  39 {
  40 private:
  41         std::vector<Section*> sections;
  42         std::set<int> avail;
  43 protected:
  44         int createTable(unsigned int nr, const __u8 *data, unsigned int max)
  45         {
  46                 unsigned int ssize = sections.size();
  47                 if (max < ssize || nr >= max)
  48                 {
  49                         TABLE_eDebug("kaputt max(%d) < ssize(%d) || nr(%d) >= max(%d)",
  50                                 max, ssize, nr, max);
  51                         return 0;
  52                 }
  53                 if (avail.find(nr) != avail.end())
  54                         delete sections[nr];
  55
  56                 sections.resize(max);
  57                 sections[nr] = new Section(data);
  58                 avail.insert(nr);
  59
  60                 for (unsigned int i = 0; i < max; ++i)
  61                         if (avail.find(i) != avail.end())
  62                                 TABLE_eDebugNoNewLine("+");
  63                         else
  64                                 TABLE_eDebugNoNewLine("-");
  65
  66                 TABLE_eDebug(" %d/%d TID %02x", avail.size(), max, data[0]);
  67
  68                 if (avail.size() == max)
  69                 {
  70                         TABLE_eDebug("done!");
  71                         return 1;
  72                 } else
  73                         return 0;
  74         }
  75 public:
  76         std::vector<Section*> &getSections() { return sections; }
  77         eTable(bool debug=true): eGTable(debug)
  78         {
  79         }
  80         ~eTable()
  81         {
  82                 for (std::set<int>::iterator i(avail.begin()); i != avail.end(); ++i)
  83                         delete sections[*i];
  84         }
  85 };
  86
  87 class eAUGTable: public Object
  88 {
  89 protected:
  90         void slotTableReady(int);
  91 public:
  92         Signal1<void, int> tableReady;
  93         virtual void getNext(int err)=0;
  94 };
  95
  96 template <class Table>
  97 class eAUTable: public eAUGTable
  98 {
  99         ePtr<Table> current, next;              // current is READY AND ERRORFREE, next is not yet ready
 100         int first;
 101         ePtr<iDVBDemux> m_demux;
 102         eMainloop *ml;
 103
 104         /* needed to detect broken table version handling (seen on some m2ts files) */
 105         struct timespec m_prev_table_update;
 106         int m_table_cnt;
 107 public:
 108
 109         eAUTable()
 110         {
 111         }
 112
 113         ~eAUTable()
 114         {
 115                 stop();
 116         }
 117
 118         void stop()
 119         {
 120                 current = next = 0;
 121                 m_demux = 0;
 122         }
 123
 124         int begin(eMainloop *m, const eDVBTableSpec &spec, ePtr<iDVBDemux> demux)
 125         {
 126                 m_table_cnt = 0;
 127                 ml = m;
 128                 m_demux = demux;
 129                 first= 1;
 130                 current = 0;
 131                 next = new Table();
 132                 CONNECT(next->tableReady, eAUTable::slotTableReady);
 133                 next->start(demux, spec);
 134                 return 0;
 135         }
 136
 137         int get()
 138         {
 139                 if (current)
 140                 {
 141                         /*emit*/ tableReady(0);
 142                         return 0;
 143                 } else if (!next)
 144                 {
 145                         /*emit*/ tableReady(-1);
 146                         return 0;
 147                 } else
 148                         return 1;
 149         }
 150
 151         RESULT getCurrent(ePtr<Table> &ptr)
 152         {
 153                 if (!current)
 154                         return -1;
 155                 ptr = current;
 156                 return 0;
 157         }
 158
 159 #if 0
 160         void abort()
 161         {
 162                 eDebug("eAUTable: aborted!");
 163                 if (next)
 164                         next->abort();
 165                 delete next;
 166                 next=0;
 167         }
 168 #endif
 169
 170         int ready()
 171         {
 172                 return !!current;
 173         }
 174
 175         void inject(Table *t)
 176         {
 177                 next=t;
 178                 getNext(0);
 179         }
 180
 181         void getNext(int error)
 182         {
 183                 current = 0;
 184                 if (error)
 185                 {
 186                         next=0;
 187                         if (first)
 188                                 /*emit*/ tableReady(error);
 189                         first=0;
 190                         return;
 191                 } else
 192                         current=next;
 193
 194                 next=0;
 195                 first=0;
 196
 197                 ASSERT(current->ready);
 198
 199                 /*emit*/ tableReady(0);
 200
 201                 eDVBTableSpec spec;
 202
 203                 if (current && (!current->getSpec(spec)))
 204                 {
 205                         /* detect broken table version handling (seen on some m2ts files) */
 206                         if (m_table_cnt)
 207                         {
 208                                 if (abs(timeout_usec(m_prev_table_update)) > 500000)
 209                                         m_table_cnt = -1;
 210                                 else if (m_table_cnt > 1) // two pmt update within one second
 211                                 {
 212                                         eDebug("Seen two consecutive table version changes within 500ms. "
 213                                             "This seems broken, so auto update for pid %04x, table %02x is now disabled!!",
 214                                             spec.pid, spec.tid);
 215                                         m_table_cnt = 0;
 216                                         return;
 217                                 }
 218                         }
 219
 220                         ++m_table_cnt;
 221                         clock_gettime(CLOCK_MONOTONIC, &m_prev_table_update);
 222
 223                         next = new Table();
 224                         CONNECT(next->tableReady, eAUTable::slotTableReady);
 225                         spec.flags &= ~(eDVBTableSpec::tfAnyVersion|eDVBTableSpec::tfThisVersion|eDVBTableSpec::tfHaveTimeout);
 226                         next->eGTable::start(m_demux, spec);
 227                 }
 228         }
 229 };
 230
 231 #endif