From 8b845f242495a91aca45cd1bf59d1823517b32c8 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Sat, 4 Jan 2014 13:41:46 +0100
Subject: disable hysteresis debug; throttle frame update rate

---
 FTNoIR_Tracker_PT/pt_video_widget.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'FTNoIR_Tracker_PT/pt_video_widget.cpp')

diff --git a/FTNoIR_Tracker_PT/pt_video_widget.cpp b/FTNoIR_Tracker_PT/pt_video_widget.cpp
index 5ac002f4..38c49567 100644
--- a/FTNoIR_Tracker_PT/pt_video_widget.cpp
+++ b/FTNoIR_Tracker_PT/pt_video_widget.cpp
@@ -18,7 +18,15 @@ using namespace std;
 void PTVideoWidget::update_image(const cv::Mat& frame)
 {
     QMutexLocker foo(&mtx);
-    _frame = frame;
+    const int rate = 40;
+    if (freshp)
+        return;
+    if (!update_throttler.isValid() || update_throttler.elapsed() > rate)
+    {
+        _frame = frame.clone();
+        update_throttler.restart();
+        freshp = true;
+    }
 }
 
 // ----------------------------------------------------------------------------
@@ -42,8 +50,9 @@ VideoWidgetDialog::VideoWidgetDialog(QWidget *parent, FrameProvider* provider)
 void PTVideoWidget::update_and_repaint()
 {
     QMutexLocker foo(&mtx);
-    if (_frame.empty())
+    if (_frame.empty() || !freshp)
         return;
+    freshp = false;
     QImage qframe = QImage(_frame.cols, _frame.rows, QImage::Format_RGB888);
     uchar* data = qframe.bits();
     const int pitch = qframe.bytesPerLine();
-- 
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