retinex: Change retinex to C++

Change the gstretinex.c file to cpp and add it into Makefile.
It is necessary to migrate the retinex element to C++,
because new Opencv API leaves obsolete functions like cvSmooth.
This element uses this function.

You can see in this link:
http://docs.opencv.org/modules/imgproc/doc/filtering.html?
highlight=cvsmooth#void cvSmooth(const CvArr* src, CvArr* dst,
int smoothtype, int size1, int size2, double sigma1, double sigma2)

https://bugzilla.gnome.org/show_bug.cgi?id=754148

diff --git a/ext/opencv/Makefile.am b/ext/opencv/Makefile.am
index 140d044..05c7b52 100644 (file)
--- a/ext/opencv/Makefile.am
+++ b/ext/opencv/Makefile.am
@@ -19,7 +19,7 @@ libgstopencv_la_SOURCES = gstopencv.cpp \
                        gsttextoverlay.c \
                        gstmotioncells.c \
                        gstskindetect.c \
-                       gstretinex.c \
+                       gstretinex.cpp \
                        gstfacedetect.cpp \
                        gstsegmentation.cpp \
                        gstgrabcut.cpp \

diff --git a/ext/opencv/gstretinex.c b/ext/opencv/gstretinex.cpp
similarity index 100%
rename from ext/opencv/gstretinex.c
rename to ext/opencv/gstretinex.cpp