configure: update OpenCV requirements to 2.3.0

With facedetect ported to C++ the minimum version of OpenCV
supported is 2.3.0

https://bugzilla.gnome.org/show_bug.cgi?id=748377

configure.ac

@@ -2453,7 +2453,7 @@ AG_GST_CHECK_FEATURE(OPENCV, [opencv plugins], opencv, [
   dnl a new version and the no-backward-compatibility define. (There doesn't
   dnl seem to be a switch to suppress the warnings the cvcompat.h header
   dnl causes.)
-  PKG_CHECK_MODULES(OPENCV, opencv >= 2.0.0 opencv < 2.5.0 , [
+  PKG_CHECK_MODULES(OPENCV, opencv >= 2.3.0 opencv < 2.5.0 , [
     AC_PROG_CXX
     AC_LANG([C++])
     OLD_CPPFLAGS=$CPPFLAGS

ext/opencv/gstfaceblur.c

@@ -365,11 +365,8 @@ gst_face_blur_transform_ip (GstOpencvVideoFilter * transform,
   faces =
       cvHaarDetectObjects (filter->cvGray, filter->cvCascade,
       filter->cvStorage, filter->scale_factor, filter->min_neighbors,
-      filter->flags, cvSize (filter->min_size_width, filter->min_size_height)
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
-      , cvSize (filter->min_size_width + 2, filter->min_size_height + 2)
-#endif
-      );
+      filter->flags, cvSize (filter->min_size_width, filter->min_size_height),
+      cvSize (filter->min_size_width + 2, filter->min_size_height + 2));
 
   for (i = 0; i < (faces ? faces->total : 0); i++) {
     CvRect *r = (CvRect *) cvGetSeqElem (faces, i);

ext/opencv/gstfaceblur.h

@@ -51,10 +51,7 @@
 #include <opencv2/core/version.hpp>
 
 #include "gstopencvvideofilter.h"
-
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
 #include <opencv2/objdetect/objdetect.hpp>
-#endif
 
 G_BEGIN_DECLS
 /* #defines don't like whitespacey bits */

ext/opencv/gstfacedetect.cpp

@@ -550,11 +550,7 @@ gst_face_detect_run_detector (GstFaceDetect * filter,
     Mat roi (filter->cvGray, r);
     detector->detectMultiScale (roi, faces, filter->scale_factor,
         filter->min_neighbors, filter->flags, cvSize (min_size_width,
-            min_size_height)
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
-        , cvSize (0, 0)
-#endif
-        );
+            min_size_height), cvSize (0, 0));
   } else {
     GST_LOG_OBJECT (filter,
         "Calculated stddev %f lesser than min_stddev %d, detection not performed",

ext/opencv/gstfacedetect.h

@@ -52,10 +52,7 @@
 #include <opencv2/core/version.hpp>
 #include <cv.h>
 #include "gstopencvvideofilter.h"
-
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
 #include <opencv2/objdetect/objdetect.hpp>
-#endif
 
 G_BEGIN_DECLS
 /* #defines don't like whitespacey bits */

ext/opencv/gsthanddetect.c

@@ -404,11 +404,8 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
   /* detect FIST gesture fist */
   hands =
       cvHaarDetectObjects (filter->cvGray, filter->cvCascade_fist,
-      filter->cvStorage, 1.1, 2, CV_HAAR_DO_CANNY_PRUNING, cvSize (24, 24)
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
-      , cvSize (0, 0)
-#endif
-      );
+      filter->cvStorage, 1.1, 2, CV_HAAR_DO_CANNY_PRUNING, cvSize (24, 24),
+      cvSize (0, 0));
 
   /* if FIST gesture detected */
   if (hands && hands->total > 0) {
@@ -496,11 +493,8 @@ gst_handdetect_transform_ip (GstOpencvVideoFilter * transform,
     /* if NO FIST gesture, detecting PALM gesture */
     hands =
         cvHaarDetectObjects (filter->cvGray, filter->cvCascade_palm,
-        filter->cvStorage, 1.1, 3, CV_HAAR_DO_CANNY_PRUNING, cvSize (24, 24)
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
-        , cvSize (0, 0)
-#endif
-        );
+        filter->cvStorage, 1.1, 3, CV_HAAR_DO_CANNY_PRUNING, cvSize (24, 24),
+        cvSize (0, 0));
     /* if PALM detected */
     if (hands && hands->total > 0) {
       int min_distance, distance;

ext/opencv/gsthanddetect.h

@@ -58,9 +58,7 @@
 #ifdef HAVE_OPENCV2_HIGHGUI_HIGHGUI_C_H
 #include <opencv2/highgui/highgui_c.h>            // includes highGUI definitions
 #endif
-#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
 #include <opencv2/objdetect/objdetect.hpp>
-#endif
 
 G_BEGIN_DECLS
 /* #defines don't like whitespacey bits */