mfhd box added

lib/mp4.cpp

@@ -531,4 +531,12 @@ namespace MP4{
     }
     return r;
   }
+  
+  MFHD::MFHD() : Box("mfhd") {
+    setInt32(0,0);
+  }
+  
+  void MFHD::setSequenceNumber( long newSequenceNumber ) {
+    setInt32( newSequenceNumber, 4 );
+  }
 };

lib/mp4.h

@@ -120,4 +120,9 @@ namespace MP4{
       std::deque<segmentRun> segmentRunTable;
   };//ASRT Box
   
+  class MFHD : public Box {
+    public:
+      MFHD();
+      void setSequenceNumber( long newSequenceNumber );
+  };//MFHD Box
 };