tracker: reduce sleep if taking too long

2 files changed, 7 insertions, 1 deletions

diff --git a/facetracknoir/tracker.cpp b/facetracknoir/tracker.cpp
index ebc8246d..094264ff 100644
--- a/facetracknoir/tracker.cpp
+++ b/facetracknoir/tracker.cpp
@@ -108,6 +108,8 @@ void Tracker::run() {
 

     for (;;)

     {

+        t.start();

+

         if (should_quit)

             break;

 

@@ -163,7 +165,9 @@ void Tracker::run() {
             }

         }

 

-        msleep(sleep_ms);

+        const long q = std::max(0L, sleep_ms * 1000L - std::max(0L, t.elapsed()));

+

+        usleep(q);

     }

 #if defined(_WIN32)

     (void) timeEndPeriod(1);

diff --git a/facetracknoir/tracker.h b/facetracknoir/tracker.h
index a33d8e0d..46440c32 100644
--- a/facetracknoir/tracker.h
+++ b/facetracknoir/tracker.h
@@ -18,6 +18,7 @@
 #include "tracker_types.h"
 #include "facetracknoir/main-settings.hpp"
 #include "facetracknoir/options.h"
+#include "facetracknoir/timer.hpp"
 using namespace options;
 
 class FaceTrackNoIR;				// pre-define parent-class to avoid circular includes
@@ -59,6 +60,7 @@ private:
     QMutex mtx;
     main_settings& s;
     volatile bool should_quit;
+    Timer t;
 protected:
 	void run();