From 0e10d8aecad00b23bd5113b50f93a08e3358bd6c Mon Sep 17 00:00:00 2001
From: Milian Wolff <milian.wolff@kdab.com>
Date: Mon, 19 Dec 2016 11:32:20 +0100
Subject: [PATCH] Add simple FPS counter to QZXingLive example

---
 examples/QZXingLive/main.qml | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/examples/QZXingLive/main.qml b/examples/QZXingLive/main.qml
index b6d7769..7268934 100644
--- a/examples/QZXingLive/main.qml
+++ b/examples/QZXingLive/main.qml
@@ -34,6 +34,15 @@ ApplicationWindow
         z: 50
         text: "Tags detected: " + detectedTags
     }
+    Text
+    {
+        id: fps
+        font.pixelSize: 20
+        anchors.top: parent.top
+        anchors.right: parent.right
+        z: 50
+        text: (1000 / zxingFilter.timePerFrameDecode).toFixed(0) + "fps"
+    }
 
     Camera
     {
@@ -103,9 +112,14 @@ ApplicationWindow
 //            console.log("started");
         }
 
+        property int framesDecoded: 0
+        property real timePerFrameDecode: 0
+
         onDecodingFinished:
         {
-           console.log("frame finished: " + succeeded, decodeTime);
+           timePerFrameDecode = (decodeTime + framesDecoded * timePerFrameDecode) / (framesDecoded + 1);
+           framesDecoded++;
+           console.log("frame finished: " + succeeded, decodeTime, timePerFrameDecode, framesDecoded);
         }
     }