lib/dvb/esection.h: add handling for broken table version handling

diff --git a/lib/dvb/esection.h b/lib/dvb/esection.h
index 2bb17a9..b4782f8 100644 (file)
--- a/lib/dvb/esection.h
+++ b/lib/dvb/esection.h
@@ -100,6 +100,10 @@ class eAUTable: public eAUGTable
        int first;
        ePtr<iDVBDemux> m_demux;
        eMainloop *ml;
+
+       /* needed to detect broken table version handling (seen on some m2ts files) */
+       struct timespec m_prev_table_update;
+       int m_table_cnt;
 public:
 
        eAUTable()
@@ -119,6 +123,7 @@ public:
        
        int begin(eMainloop *m, const eDVBTableSpec &spec, ePtr<iDVBDemux> demux)
        {
+               m_table_cnt = 0;
                ml = m;
                m_demux = demux;
                first= 1;
@@ -197,6 +202,24 @@ public:
 
                if (current && (!current->getSpec(spec)))
                {
+                       /* detect broken table version handling (seen on some m2ts files) */
+                       if (m_table_cnt)
+                       {
+                               if (abs(timeout_usec(m_prev_table_update)) > 500000)
+                                       m_table_cnt = -1;
+                               else if (m_table_cnt > 1) // two pmt update within one second
+                               {
+                                       eDebug("Seen two consecutive table version changes within 500ms. "
+                                           "This seems broken, so auto update for pid %04x, table %02x is now disabled!!",
+                                           spec.pid, spec.tid);
+                                       m_table_cnt = 0;
+                                       return;
+                               }
+                       }
+
+                       ++m_table_cnt;
+                       clock_gettime(CLOCK_MONOTONIC, &m_prev_table_update);
+
                        next = new Table();
                        CONNECT(next->tableReady, eAUTable::slotTableReady);
                        spec.flags &= ~(eDVBTableSpec::tfAnyVersion|eDVBTableSpec::tfThisVersion|eDVBTableSpec::tfHaveTimeout);