utils - update from template repo

src/utils.cc

@@ -94,7 +94,6 @@ namespace Heck {
 } // namespace Heck
 
 namespace Heck {
-
     void SWTimer::set_period(u32 time_units)
     {
         time_period_ = time_units;
@@ -108,14 +107,13 @@ namespace Heck {
     bool SWTimer::is_it_already_time_again(u32 time_now)
     {
         if (time_now - time_last_exec_ >= time_period_) {
+            time_last_exec_ = time_now;
             if (callback_) {
-                callback_(time_now);
+                //todo: constexpr if metrics
+                callback_();
             }
-            time_last_exec_ = time_now;
             return true;
         }
         return false;
     }
-
-
 } // namespace Heck

src/utils.hh

@@ -1,8 +1,8 @@
-#ifndef HECK_OSP_UTILS_HH
+#ifndef HECK_DAISY_UTILS_HH
-#define HECK_OSP_UTILS_HH
+#define HECK_DAISY_UTILS_HH
 
 #include "daisy_seed.h"
-#include "main_osp.hh"
+#include "types.hh"
 
 namespace Heck {
     void GetMidiTypeAsString(const ld::MidiEvent& msg, char* str);
@@ -21,10 +21,40 @@ namespace Heck {
         void set_period(u32 time_units);
         void set_callback(const Callback& cb);
         bool is_it_already_time_again(u32 time_now);
+
     private:
         Callback callback_{};
         u32 time_last_exec_{};
         u32 time_period_{};
     };
 } // namespace Heck
+
+namespace Heck {
+    template<typename T> class Observer {
+
+    public:
+        bool on_change(T val_new, std::function<void(T val_current)> fn)
+        {
+            if (val_new != val_current_) {
+                val_current_ = val_new;
+                fn(val_current_);
+                return true;
+            }
+            return false;
+        }
+
+        bool on_change_fuzzy(T val_new, T min_deviation, std::function<void(T val_current)> fn)
+        {
+            if (std::abs(val_new - val_current_) >= min_deviation) {
+                val_current_ = val_new;
+                fn(val_current_);
+                return true;
+            }
+            return false;
+        }
+
+    private:
+        static inline T val_current_{};
+    };
+} // namespace Heck
 #endif // HECK_DAISY_UTILS_HH