dash: Adding an helper to compute a segment size

Conflicts:

	modules/stream_filter/dash/mpd/Segment.h

modules/stream_filter/dash/mpd/Segment.cpp

@@ -26,6 +26,9 @@
 #endif
 
 #include "Segment.h"
+#include "Representation.h"
+
+#include <cassert>
 
 using namespace dash::mpd;
 using namespace dash::http;
@@ -35,6 +38,11 @@ Segment::Segment(const Representation *parent) :
         endByte    (-1),
         parentRepresentation( parent )
 {
+    assert( parent != NULL );
+    if ( parent->getSegmentInfo() != NULL && parent->getSegmentInfo()->getDuration() >= 0 )
+        this->size = parent->getBandwidth() * parent->getSegmentInfo()->getDuration();
+    else
+        this->size = -1;
 }
 
 std::string             Segment::getSourceUrl   () const
@@ -112,3 +120,8 @@ const Representation *Segment::getParentRepresentation() const
 {
     return this->parentRepresentation;
 }
+
+int Segment::getSize() const
+{
+    return this->size;
+}

modules/stream_filter/dash/mpd/Segment.h

@@ -57,6 +57,7 @@ namespace dash
                 virtual int                             getEndByte      () const;
                 virtual dash::http::Chunk*              toChunk         ();
                 const Representation*                   getParentRepresentation() const;
+                virtual int                             getSize() const;
 
             protected:
                 std::string             sourceUrl;
@@ -64,6 +65,7 @@ namespace dash
                 int                     startByte;
                 int                     endByte;
                 const Representation*   parentRepresentation;
+                int                     size;
         };
     }
 }