Changeset 853 in SHVCSoftware

Timestamp:

5 Aug 2014, 02:38:23 (10 years ago)

Author:

qualcomm

Message:

Modification to semantics of prev_pics_not_used_flag in temporal motion vector prediction constraints SEI message

Adoption of JCTVC-R0226. (Macro: R0226_CONSTRAINT_TMVP_SEI)

From: Hendry <fhendry@…>

Location:

branches/SHM-dev/source/Lib

Files:

• TLibCommon/TypeDef.h (modified) (1 diff)
• TLibDecoder/TDecTop.cpp (modified) (2 diffs)

branches/SHM-dev/source/Lib/TLibCommon/TypeDef.h

@@ -52 +52 @@
 #define O0137_MAX_LAYERID                1      ///< JCTVC-O0137, JCTVC-O0200, JCTVC-O0223: restrict nuh_layer_id and vps_max_layers_minus1
 
+#define R0226_CONSTRAINT_TMVP_SEI        1      ///< JCTVC-R0226, Modification to semantics in temporal motion vector prediction constraints SEI message
 #define R0226_SLICE_TMVP                 1      ///< JCTVC-R0226, Regarding slice_temporal_mvp_enabled_flag
 #define R0279_REP_FORMAT_INBL            1      ///< JCTVC-R0279, For any independent non-base layer the used representation format is the one that is signalled in the active SPS for the layer

branches/SHM-dev/source/Lib/TLibDecoder/TDecTop.cpp

@@ -1335 +1335 @@
 #endif
 
+
 #if R0226_SLICE_TMVP
   if ( m_apcSlicePilot->getTLayer() == 0 && m_apcSlicePilot->getEnableTMVPFlag() == 0 )
@@ -1743 +1744 @@
         isTff =  (pictureTiming->m_picStruct == 1);
       }
+
+#if R0226_CONSTRAINT_TMVP_SEI
+      // Check if any new temporal motion vector prediction constraints SEI has arrived
+      SEIMessages seiTMVPConstrainsList = extractSeisByType (m_SEIs, SEI::TMVP_CONSTRAINTS);
+      if (seiTMVPConstrainsList.size() > 0)
+      {
+        assert ( pcPic->getTLayer() == 0 );  //this SEI can present only for AU with Tid equal to 0
+        SEITMVPConstrains* tmvpConstraintSEI = (SEITMVPConstrains*) *(seiTMVPConstrainsList.begin());
+        if ( tmvpConstraintSEI->prev_pics_not_used_flag == 1 )
+        {
+          //update all pics in the DPB such that they cannot be used for TMPV ref
+          TComList<TComPic*>::iterator  iterRefPic = m_cListPic.begin();  
+          while( iterRefPic != m_cListPic.end() )
+          {
+            TComPic *refPic = *iterRefPic;
+            if( ( refPic->getLayerId() == pcPic->getLayerId() ) && refPic->getReconMark() )
+            {
+              for(Int i = refPic->getNumAllocatedSlice()-1; i >= 0; i--)
+              {
+                TComSlice *refSlice = refPic->getSlice(i);
+                refSlice->setAvailableForTMVPRefFlag( false );
+              }
+            }
+            iterRefPic++;
+          }
+        }
+      }
+#endif
     }