timer: split start/elapsed. convert uses

2 files changed, 4 insertions, 7 deletions

diff --git a/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp b/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp
index 2fd5a514..05e7b067 100644
--- a/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp
+++ b/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp
@@ -59,7 +59,8 @@ void Tracker::run()
     while((commands & ABORT) == 0)
     {
         apply_inner();
-        const double dt = time.start() * 1e-9;
+        const double dt = time.elapsed() * 1e-9;
+        time.start();
         cv::Mat frame;
         const bool new_frame = camera.get_frame(dt, &frame);
 
diff --git a/opentrack/timer.hpp b/opentrack/timer.hpp
index 93c0a1f4..1b52b6c8 100644
--- a/opentrack/timer.hpp
+++ b/opentrack/timer.hpp
@@ -51,12 +51,8 @@ public:
     Timer() {
         start();
     }
-    long start() {
-        struct timespec cur;
-        (void) clock_gettime(CLOCK_MONOTONIC, &cur);
-        long ret = conv(cur);
-        state = cur;
-        return ret;
+    void start() {
+        (void) clock_gettime(CLOCK_MONOTONIC, &state);
     }
     long elapsed() {
         struct timespec cur;