OpenCV example: move to C++ and opencv2 APIs

configure.ac

@@ -1749,7 +1749,7 @@ PKG_ENABLE_MODULES_VLC([BLURAY], [libbluray], [libbluray >= 0.2.1], (libbluray f
 dnl
 dnl  OpenCV wrapper and example filters
 dnl
-PKG_ENABLE_MODULES_VLC([OPENCV], [opencv_example opencv_wrapper], [opencv], (OpenCV (computer vision) filter), [auto])
+PKG_ENABLE_MODULES_VLC([OPENCV], [opencv_example opencv_wrapper], [opencv > 2.0], (OpenCV (computer vision) filter), [auto])
 
 
 dnl

modules/video_filter/Modules.am

@@ -62,7 +62,7 @@ SOURCES_gradient = gradient.c
 SOURCES_ball = ball.c
 SOURCES_panoramix = panoramix.c
 SOURCES_opencv_wrapper = opencv_wrapper.c
-SOURCES_opencv_example = opencv_example.c filter_event_info.h
+SOURCES_opencv_example = opencv_example.cpp filter_event_info.h
 SOURCES_rotate = rotate.c
 SOURCES_puzzle = puzzle.c
 SOURCES_colorthres = colorthres.c

modules/video_filter/opencv_example.c → modules/video_filter/opencv_example.cpp

@@ -39,8 +39,9 @@
 #include <vlc_image.h>
 #include "filter_event_info.h"
 
-#include <cxcore.h>
-#include <cv.h>
+#include <opencv2/core/core_c.h>
+#include <opencv2/core/core.hpp>
+#include <opencv2/objdetect/objdetect.hpp>
 
 /*****************************************************************************
  * filter_sys_t : filter descriptor