video-blend: Fix linking error with C++

Add missing extern "C"

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4735>

diff --git a/subprojects/gst-plugins-base/gst-libs/gst/video/video-blend.h b/subprojects/gst-plugins-base/gst-libs/gst/video/video-blend.h
index 1d6175b..e5ef325 100644 (file)
--- a/subprojects/gst-plugins-base/gst-libs/gst/video/video-blend.h
+++ b/subprojects/gst-plugins-base/gst-libs/gst/video/video-blend.h
@@ -27,6 +27,8 @@
 #include <gst/gst.h>
 #include <gst/video/video.h>
 
+G_BEGIN_DECLS
+
 GST_VIDEO_API
 void       gst_video_blend_scale_linear_RGBA  (GstVideoInfo * src, GstBuffer * src_buffer,
                                                gint dest_height, gint dest_width,
@@ -38,4 +40,6 @@ gboolean   gst_video_blend                    (GstVideoFrame * dest,
                                                gint x, gint y,
                                                gfloat global_alpha);
 
+G_END_DECLS
+
 #endif