Added double exponential smoothing implementation

2 files changed, 14 insertions, 0 deletions

diff --git a/src/include/ndpi_api.h.in b/src/include/ndpi_api.h.in
index cb5e45931..118240916 100644
--- a/src/include/ndpi_api.h.in
+++ b/src/include/ndpi_api.h.in
@@ -1479,6 +1479,11 @@ extern "C" {
 
   /* ******************************* */
 
+  int ndpi_des_init(struct ndpi_des_struct *des, double alpha, double beta, float significance);
+  int ndpi_des_add_value(struct ndpi_des_struct *des, const u_int32_t _value, double *forecast, double *confidence_band);
+
+  /* ******************************* */
+
   int   ndpi_jitter_init(struct ndpi_jitter_struct *hw, u_int16_t num_periods);
   void  ndpi_jitter_free(struct ndpi_jitter_struct *hw);
   float ndpi_jitter_add_value(struct ndpi_jitter_struct *s, const float value);
diff --git a/src/include/ndpi_typedefs.h b/src/include/ndpi_typedefs.h
index de9a404c8..aac7b56db 100644
--- a/src/include/ndpi_typedefs.h
+++ b/src/include/ndpi_typedefs.h
@@ -1672,6 +1672,15 @@ struct ndpi_ses_struct {
   double sum_square_error, last_forecast, last_value;
 };
 
+struct ndpi_des_struct {
+  struct {
+    double alpha, beta, ro;
+  } params;
+
+  u_int32_t num_values;
+  double sum_square_error, last_forecast, last_trend, last_value;
+};
+
 /* **************************************** */
 
 /* Prototype used to define custom DGA detection function */