Index: trunk/Ohana/src/opihi/include/dvoshell.h
===================================================================
--- trunk/Ohana/src/opihi/include/dvoshell.h	(revision 39569)
+++ trunk/Ohana/src/opihi/include/dvoshell.h	(revision 40408)
@@ -41,4 +41,20 @@
 char *HOSTDIR;
 char *RESULT_FILE;
+
+typedef struct {
+  int Nmeasure;
+  int Nperiods;
+  opihi_flt *period;
+  opihi_flt *power;
+  double P50;
+  double R50;
+  double R90;
+} PeriodogramResult;
+
+/*** Periodogram functions (avperiodogram and avperiodomatch) ***/
+void PeriodogramResultFree (PeriodogramResult *result);
+void PeriodogramResultSave (PeriodogramResult *result, char *extname, FILE *foutput, Average *average);
+void PeriodogramSetOptions (float minimumPeriod, float maximumPeriod);
+PeriodogramResult *PeriodogramRawFloatingMean (opihi_flt *time, opihi_flt *flux, opihi_flt *dflux, int Npts);
 
 /*** dvo prototypes ***/