if no filter selected run at correct speed

src/main_window.cpp

@@ -26,7 +26,6 @@ void generate_map() {
         filter_map[filter_n] = std::make_pair(1, index);
         ++index;
     }
-    
     for(unsigned int j = 0; j < plugins.plugin_list.size(); ++j) {
         std::string name = "plugin " + plugins.plugin_list[j]->name();
         filter_map[name] = std::make_pair(2, j);
@@ -227,7 +226,6 @@ void AC_MainWindow::cb_SetIndex(int index) {
     
 }
 void AC_MainWindow::addClicked() {
-    
     int row = filters->currentRow();
     if(row != -1) {
         QListWidgetItem *item = filters->item(row);
@@ -253,7 +251,6 @@ void AC_MainWindow::rmvClicked() {
         std::vector<std::pair<int, int>> v;
         buildVector(v);
         playback->setVector(v);
-        
     }
 }
 
@@ -266,7 +263,6 @@ void AC_MainWindow::upClicked() {
         std::vector<std::pair<int, int>> v;
         buildVector(v);
         playback->setVector(v);
-        
     }
 }
 

src/playback_thread.cpp

@@ -49,6 +49,9 @@ void Playback::setDisplayed(bool shown) {
 }
 
 void Playback::run() {
+    
+    int duration = 1000/ac::fps;
+    
     while(!stop) {
         mutex.lock();
         if(!capture.read(frame)) {
@@ -78,6 +81,8 @@ void Playback::run() {
                     draw_plugin(frame, cur[i].second);
                 }
             }
+        } else {
+            msleep(duration);
         }
         mutex.lock();
         if(recording && writer.isOpened()) {