From 41c47a84fc55aa2eacc76c1ccb5288e265a493df Mon Sep 17 00:00:00 2001
From: E Sommerlade <es0m@users.noreply.github.com>
Date: Wed, 26 Oct 2016 15:59:44 +0100
Subject: [PATCH] restored Parameters() constructor to maintain ABI
 compatibility. Added CV_EXPORTS to nested class

---
 .../include/opencv2/objdetect/detection_based_tracker.hpp | 8 ++------
 modules/objdetect/src/detection_based_tracker.cpp         | 6 ++++++
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/modules/objdetect/include/opencv2/objdetect/detection_based_tracker.hpp b/modules/objdetect/include/opencv2/objdetect/detection_based_tracker.hpp
index 14845c47f8..44213a818a 100644
--- a/modules/objdetect/include/opencv2/objdetect/detection_based_tracker.hpp
+++ b/modules/objdetect/include/opencv2/objdetect/detection_based_tracker.hpp
@@ -59,16 +59,12 @@ namespace cv
 class CV_EXPORTS DetectionBasedTracker
 {
     public:
-        struct Parameters
+        struct CV_EXPORTS Parameters
         {
             int maxTrackLifetime;
             int minDetectionPeriod; //the minimal time between run of the big object detector (on the whole frame) in ms (1000 mean 1 sec), default=0
 
-            Parameters()
-            {
-                maxTrackLifetime=5;
-                minDetectionPeriod=0;
-            }
+            Parameters();
         };
 
         class IDetector
diff --git a/modules/objdetect/src/detection_based_tracker.cpp b/modules/objdetect/src/detection_based_tracker.cpp
index 0b643926e8..5bff2f9ab6 100644
--- a/modules/objdetect/src/detection_based_tracker.cpp
+++ b/modules/objdetect/src/detection_based_tracker.cpp
@@ -578,6 +578,12 @@ bool cv::DetectionBasedTracker::SeparateDetectionWork::communicateWithDetectingT
     return shouldHandleResult;
 }
 
+cv::DetectionBasedTracker::Parameters::Parameters()
+{
+  maxTrackLifetime = 5;
+  minDetectionPeriod = 0;
+}
+
 cv::DetectionBasedTracker::InnerParameters::InnerParameters()
 {
     numLastPositionsToTrack=4;