Changeset 516 in SHVCSoftware for branches/SHM-4.1-dev/source/App

Timestamp:

17 Dec 2013, 10:27:32 (11 years ago)

Author:

qualcomm

Message:

DPB-information for output layer sets in the VPS extension. (MACRO: VPS_DPB_SIZE_TABLE)

Includes DPB-table signaling for output layer sets in the VPS extension.

From: Adarsh K. Ramasubramonian <aramasub@…>

File:

• branches/SHM-4.1-dev/source/App/TAppEncoder/TAppEncTop.cpp (modified) (2 diffs)

branches/SHM-4.1-dev/source/App/TAppEncoder/TAppEncTop.cpp

@@ -90 +90 @@
     vps->setMaxDecPicBuffering             ( m_maxDecPicBuffering[i], i );
   }
+
 #if REPN_FORMAT_IN_VPS
   vps->setRepFormatIdxPresentFlag( true );   // Could be disabled to optimize in some cases.
@@ -1191 +1192 @@
   }
 #endif
+ #if VPS_DPB_SIZE_TABLE
+  // The Layer ID List variables can be derived here.  
+#if DERIVE_LAYER_ID_LIST_VARIABLES
+  vps->deriveLayerIdListVariables();
+#endif
+  vps->deriveNumberOfSubDpbs();
+  // Initialize dpb_size_table() for all ouput layer sets in the VPS extension
+  for(i = 1; i < vps->getNumOutputLayerSets(); i++)
+  {
+    Int layerSetId = vps->getOutputLayerSetIdx(i);
+
+    // For each output layer set, set the DPB size for each layer and the reorder/latency value the maximum for all layers
+    Bool checkFlagOuter = false;      // Used to calculate sub_layer_flag_info_present_flag
+    Bool checkFlagInner[MAX_TLAYER];  // Used to calculate sub_layer_dpb_info_present_flag
+
+    for(Int j = 0; j < vps->getMaxTLayers(); j++)
+    {
+
+      Int maxNumReorderPics = -1;
+      for(Int k = 0; k < vps->getNumSubDpbs(i); k++)
+      {
+        Int layerId = vps->getLayerSetLayerIdList(layerSetId, k); // k-th layer in the output layer set
+        vps->setMaxVpsDecPicBufferingMinus1( i, k, j,  m_acTEncTop[layerId].getMaxDecPicBuffering(j) );
+        maxNumReorderPics       = std::max( maxNumReorderPics, m_acTEncTop[layerId].getNumReorderPics(j));
+      }
+      vps->setMaxVpsNumReorderPics(i, j, maxNumReorderPics);
+      
+      if( j == 0 )  // checkFlagInner[0] is always 1
+      {
+        checkFlagInner[j] = true;     // Always signal sub-layer DPB information for the first sub-layer
+      }
+      else
+      {
+        checkFlagInner[j] = false;    // Initialize to be false. If the values of the current sub-layers matches with the earlier sub-layer, 
+                                      // then will be continue to be false - i.e. the j-th sub-layer DPB info is not signaled
+        checkFlagInner[j] |= ( maxNumReorderPics != vps->getMaxVpsNumReorderPics(i, j - 1) );
+        for(Int k = 0; k < vps->getNumSubDpbs(i) && !checkFlagInner[j]; k++)  // If checkFlagInner[j] is true, break and signal the values
+        {
+          checkFlagInner[j] |= ( vps->getMaxVpsDecPicBufferingMinus1(i, k, j - 1) != vps->getMaxVpsDecPicBufferingMinus1(i, k, j) );
+        }
+      }
+      // If checkFlagInner[j] = true, then some value needs to be signalled for the j-th sub-layer
+      vps->setSubLayerDpbInfoPresentFlag( i, j, checkFlagInner[j] );
+    }
+    for(Int j = 1; j < vps->getMaxTLayers(); j++) // Check if DPB info of any of non-zero sub-layers is signaled. If so set flag to one
+    {
+      if( vps->getSubLayerDpbInfoPresentFlag(i, j) )
+      {
+        checkFlagOuter = true;
+        break;
+      }
+    }
+    vps->setSubLayerFlagInfoPresentFlag( i, checkFlagOuter );
+  }
+#endif
 #if VPS_EXTN_DIRECT_REF_LAYERS
   // Direct reference layers