Change difference calculation with clock.

src/prrt/clock.c

@@ -41,8 +41,9 @@ bool PrrtClock_update(PrrtClock *clock, uint32_t referenceTime, uint32_t rtt)
     prrtTimestamp_t currentTime = PrrtClock_get_current_time_us();
     prrtTimestamp_t virtualTime = clock->virtualTime;
     int32_t clockSkew = clock->skew;
-    prrtTimestamp_t delay = rtt >> 1; // half the rtt
-    int32_t phaseError = referenceTime - virtualTime + delay;
+    prrtTimedelta_t delay = rtt /2; // half the rtt
+    int32_t phaseError = (int32_t) diff_ts(referenceTime, virtualTime) + delay;
+    //debug("Virtual Time: %u, Current Time: %u, Phase Error: %d, Delay: %u, Skew: %d", virtualTime, currentTime, phaseError, delay, clockSkew);
 
     if(abs(phaseError) > 10000) {
         clock->meanDeviation = 0;
@@ -67,7 +68,7 @@ bool PrrtClock_update(PrrtClock *clock, uint32_t referenceTime, uint32_t rtt)
     clock->lastMeasurement = currentTime;
     clock->virtualTime = virtualTime;
 
-    debug("Current Time: %d; Virtual Time %d; Skew: %d", currentTime, virtualTime, clockSkew);
+    //debug("Current Time: %u; Virtual Time %u; Skew: %d; Mean Deviation: %u", currentTime, virtualTime, clockSkew, meanDeviation);
     return true;
 }