Add changelog, fix of IFP and unified merge

Author: adamjw24

changelog.txt

@@ -1,3 +1,34 @@
+/////////////////////////////////////////
+tag 1.13.0-rc1
+
+* libvvenc:
+  - many ARM SIMD optimizations for both NEON and SVE
+  - added parameters
+    - m_GOPQPA: enableed GOP adaptive QP cascade (default: on if QPA off)
+    - m_numParallelGOPs: allows to encode multiple GOPs at once, improving multi-threading for large number of threads (default: off)
+    - m_fga (experimental): enables film grain analysis and embeds FGS SEI in the encoded bitstreams (default: off)
+  - changed parameters:
+    - m_DecodingRefreshType: added a DASH optimized mode VVENC_DRT_IDR_NO_RADL - starts each intra period with an IDR frame
+                             without leading picture, allowing simple splitting into segments at each IDR.
+  - preset adjustments:
+    - 5% speedup for medium
+    - 2% speedup for slow and slower
+  - memory reduction for medium/fast/faster
+  - bugfixes
+  - cleanups
+
+* vvencFFapp:
+  - added parameters:
+    - GOPQPA: enabled GOP adaptive QP cascade (default: on if QPA off)
+    - NumParallelGOPs: allows to encode multiple GOPs at once (default: off)
+    - FGA: enables the experimental film grain analysis (default: off)
+  - changed parameters:
+    - DecodingRefreshType: now also accepts values "6" and "idr_no_radl" enabling the new DASH optimized IDR only structure.
+
+* vvencapp:
+  - changed parameters:
+    - refreshtype: now also accepts values "6" and "idr_no_radl" enabling the new DASH optimized IDR only structure.
+
 /////////////////////////////////////////
 tag 1.12.1
 

source/Lib/EncoderLib/EncCu.cpp

@@ -2347,7 +2347,8 @@ void EncCu::addGpmCandsToPruningList( const MergeCtx &mergeCtx, const UnitArea &
     }
     else
     {
-      if( m_mergeItemList.getMergeItemInList( m_mergeItemList.size() - 1 )->cost <= mergeItem->cost || ( best2geo[1] && best2geo[1]->cost <= mergeItem->cost ) )
+      if( ( m_mergeItemList.size() > 0 && m_mergeItemList.getMergeItemInList( m_mergeItemList.size() - 1 )->cost <= mergeItem->cost ) ||
+        ( best2geo[1] && best2geo[1]->cost <= mergeItem->cost ) )
       {
         m_mergeItemList    . giveBackMergeItem( mergeItem );
       }