[DashTree] Allow template segment with partial duration

fix possible missing last segment at the end of stream due to partial segment duration

Author: CastagnaIT

src/parser/DASHTree.cpp

@@ -1826,8 +1826,15 @@ void adaptive::CDashTree::GenerateTemplatedSegments(PLAYLIST::CSegmentTemplate&
   const uint64_t timeEnd = wndEnd * segTimescale / 1000;
 
   // Create segments within time window
-  while (time + segDuration <= timeEnd && segNumber <= segNumberEnd)
+  while (time < timeEnd && segNumber <= segNumberEnd)
   {
+    const uint64_t remainingDur = timeEnd - time;
+    uint64_t duration = segDuration;
+
+    // Allow segment with partial duration for the end of stream
+    if (remainingDur < duration && !m_isLive)
+      duration = remainingDur;
+
     CSegment seg;
     seg.startPTS_ = time;
     seg.m_endPts = time + segDuration;