opencv: GST_EXPORT -> GST_OPENCV_API

We need different export decorators for the different libs.
For now no actual change though, just rename before the release,
and add prelude headers to define the new decorator to GST_EXPORT.

gst-libs/gst/opencv/Makefile.am

@@ -5,6 +5,7 @@ libgstopencv_@GST_API_VERSION@_la_SOURCES = \
 	gstopencvvideofilter.cpp
 
 libgstopencv_@GST_API_VERSION@_la_CXXFLAGS = \
+	$(GST_PLUGINS_BAD_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CXXFLAGS) \
 	$(OPENCV_CFLAGS)
 
@@ -17,5 +18,6 @@ libgstopencv_@GST_API_VERSION@_la_LDFLAGS = \
 libgstopencv_@GST_API_VERSION@includedir = \
 	$(includedir)/gstreamer-@GST_API_VERSION@/gst/opencv
 libgstopencv_@GST_API_VERSION@include_HEADERS = \
+	opencv-prelude.h \
 	gstopencvutils.h \
 	gstopencvvideofilter.h

gst-libs/gst/opencv/gstopencvutils.h

@@ -28,24 +28,25 @@
 
 #include <gst/gst.h>
 #include <gst/video/video.h>
+#include <gst/opencv/opencv-prelude.h>
 
 G_BEGIN_DECLS
 
-GST_EXPORT
+GST_OPENCV_API
 gboolean gst_opencv_parse_iplimage_params_from_caps
     (GstCaps * caps, gint * width, gint * height, gint * depth,
     gint * channels, GError ** err);
 
-GST_EXPORT
+GST_OPENCV_API
 gboolean gst_opencv_iplimage_params_from_video_info
     (GstVideoInfo * info, gint * width, gint * height, gint * depth,
     gint * channels, GError ** err);
 
-GST_EXPORT
+GST_OPENCV_API
 gboolean gst_opencv_cv_image_type_from_video_format (GstVideoFormat format,
     int * cv_type, GError ** err);
 
-GST_EXPORT
+GST_OPENCV_API
 GstCaps * gst_opencv_caps_from_cv_image_type (int cv_type);
 
 G_END_DECLS

gst-libs/gst/opencv/gstopencvvideofilter.h

@@ -46,6 +46,7 @@
 
 #include <gst/gst.h>
 #include <gst/video/gstvideofilter.h>
+#include <gst/opencv/opencv-prelude.h>
 
 G_BEGIN_DECLS
 
@@ -101,10 +102,10 @@ struct _GstOpencvVideoFilterClass
   GstOpencvVideoFilterSetCaps cv_set_caps;
 };
 
-GST_EXPORT
+GST_OPENCV_API
 GType gst_opencv_video_filter_get_type (void);
 
-GST_EXPORT
+GST_OPENCV_API
 void gst_opencv_video_filter_set_in_place (GstOpencvVideoFilter * transform,
                                            gboolean ip);
 

gst-libs/gst/opencv/meson.build

@@ -4,6 +4,7 @@ opencv_sources = [
 ]
 
 opencv_headers = [
+  'opencv-prelude.h',
   'gstopencvutils.h',
   'gstopencvvideofilter.h',
 ]

gst-libs/gst/opencv/opencv-prelude.h

@@ -0,0 +1,31 @@
+/* GStreamer OpenCV Library
+ * Copyright (C) 2018 GStreamer developers
+ *
+ * opencv-prelude.h: prelude include header for gst-opencv library
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_OPENCV_PRELUDE_H__
+#define __GST_OPENCV_PRELUDE_H__
+
+#include <gst/gst.h>
+
+#ifndef GST_OPENCV_API
+#define GST_OPENCV_API GST_EXPORT
+#endif
+
+#endif /* __GST_OPENCV_PRELUDE_H__ */