Lib ogg added new function

lib/theora.cpp

@@ -34,6 +34,19 @@ namespace theora{
     return ntohl(result);
   }
 
+  uint16_t header::getInt16(size_t index){
+    /*if (index + 3 >= datasize){
+      if ( !reserve(index, 0, 4)){
+        return 0;
+      }
+      setInt32(0, index);
+    }*/
+    uint16_t result;
+    memcpy((char*) &result, data + index, 2);
+    return ntohs(result);
+  }
+
+  
   header::header(){
     data = NULL;
     datasize = 0;
@@ -83,6 +96,13 @@ namespace theora{
     };
   }
   
+  char header::getKFGShift(){
+    if (getHeaderType() == 0){
+      return (getInt16(40) >> 5) & 0x1F;
+    }
+    return 0;
+  }
+  
   long unsigned int header::getFRN(){
     if (getHeaderType() == 0){
       return getInt32(22);

lib/theora.h

@@ -7,10 +7,12 @@ namespace theora{
       header();
       bool read(char* newData, unsigned int length);
       int getHeaderType();
-      long unsigned int getFRN();
+      char getKFGShift();
-      long unsigned int getFRD();
+      long unsigned int getFRN();//frame rate numerator
+      long unsigned int getFRD();//frame rate denominator
     protected:
       uint32_t getInt32(size_t index);
+      uint16_t getInt16(size_t index);
     private:
       char* data;
       unsigned int datasize;