ENH: flag to disable propagation in PipelineMemoryPrintCalculator

Modules/Core/Streaming/include/otbPipelineMemoryPrintCalculator.h

@@ -114,7 +114,7 @@ public:
   itkSetObjectMacro(DataToWrite, DataObjectType);
 
   /** Compute pipeline memory print */
-  void Compute();
+  void Compute(bool propagate=true);
 
   /** Const conversion factor */
   static const double ByteToMegabyte;

Modules/Core/Streaming/src/otbPipelineMemoryPrintCalculator.cxx

@@ -71,15 +71,18 @@ PipelineMemoryPrintCalculator
 
 void
 PipelineMemoryPrintCalculator
-::Compute()
+::Compute(bool propagate)
 {
   // Clear the visited process objects set
   m_VisitedProcessObjects.clear();
 
   // Dry run of pipeline synchronisation
-  m_DataToWrite->UpdateOutputInformation();
-  m_DataToWrite->SetRequestedRegionToLargestPossibleRegion();
-  m_DataToWrite->PropagateRequestedRegion();
+  if (propagate)
+    {
+    m_DataToWrite->UpdateOutputInformation();
+    m_DataToWrite->SetRequestedRegionToLargestPossibleRegion();
+    m_DataToWrite->PropagateRequestedRegion();
+    }
 
   // Get the source process object
   ProcessObjectType * source = m_DataToWrite->GetSource();