From 5da7f10c3e6e16a610049cacb6561203b1f7b47a Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Sun, 7 Aug 2005 13:52:29 +0200
Subject: Fixed setting system time to avoid time jumps in case of faulty data

---
 CONTRIBUTORS |  1 +
 HISTORY      |  2 ++
 eit.c        | 18 ++++++++++++------
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 40c0d56e..ae1e3410 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -469,6 +469,7 @@ Oliver Lorei <oliverlorei@cityweb.de>
 
 Andreas Böttger <fboettger@t-online.de>
  for reporting a bug in skipping forward in time shift mode near the end of the recording
+ for fixing setting system time to avoid time jumps in case of faulty data
 
 Onno Kreuzinger <ok@solutas.net>
  for reporting leftover references to the file FORMATS in MANUAL and svdrp.c
diff --git a/HISTORY b/HISTORY
index 695d76d3..8110a215 100644
--- a/HISTORY
+++ b/HISTORY
@@ -3668,3 +3668,5 @@ Video Disk Recorder Revision History
   a forced EPG scan works even if EPG scan timeout is set to 0 (thanks to
   Bernhard Stegmaier for reporting a problem with this).
 - Fixed cDvbSpuBitmap::putPixel() (thanks to Reinhard Nissl).
+- Fixed setting system time to avoid time jumps in case of faulty data (thanks
+  to Andreas Böttger).
diff --git a/eit.c b/eit.c
index ef21e327..42229f8f 100644
--- a/eit.c
+++ b/eit.c
@@ -8,7 +8,7 @@
  * 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 1.108 2005/06/11 15:31:21 kls Exp $
+ * $Id: eit.c 1.109 2005/08/07 13:52:29 kls Exp $
  */
 
 #include "eit.h"
@@ -252,11 +252,13 @@ cEIT::cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data)
 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)
@@ -266,12 +268,16 @@ cTDT::cTDT(const u_char *Data)
   time_t sattim = getTime();
   time_t loctim = time(NULL);
 
-  if (abs(sattim - loctim) > 2) {
+  int diff = abs(sattim - loctim);
+  if (diff > 2) {
      mutex.Lock();
-     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");
+     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();
      }
 }
-- 
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