enhanced hls, warning when ts dup or jmp.

trunk/src/app/srs_app_hls.hpp

@@ -180,6 +180,9 @@ private:
     // the deviation in seconds to adjust the fragment to be more
     // bigger or smaller.
     double hls_fragment_deviation;
+    // the previous reap floor timestamp,
+    // used to detect the dup or jmp or ts.
+    int64_t previous_floor_ts;
 private:
     int _sequence_no;
     int target_duration;