gistfile1.txt

#include "ppcutils/stackobject.h"

...

IMError
IMStartAPDVideoMode()
{
   ppcutils::StackObject<be_val<uint32_t>> previous;
   auto result = IM_GetNvParameterWithoutHandleAndItb(IMParameter::APDPeriod, previous);

   if (result != IMError::OK) {
      return result;
   }

   if (*previous == 14400) {
      return IMError::OK;
   }

   return IM_SetRuntimeParameter(IMParameter::APDPeriod, 14400);
}