[libcamera-devel] [PATCH] gstreamer: Support for pre-1.16 GstEvent

[Laurent Pinchart]

The gst_clear_event() function used by libcamerasrc has been introduced
in GStreamer 1.16, while libcamera claims to need 1.14 or newer. This
causes a compilation error. Fix it by copying the gst_clear_event()
implementation to gstlibcamera-utils.h when compiling with older
GStreamer version.

The version check makes it clear that the workaround is needed with
older versions only, flagging it for removal when the minimum GStreamer
version requirement will be bumped.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/gstreamer/gstlibcamera-utils.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gstreamer/gstlibcamera-utils.h b/src/gstreamer/gstlibcamera-utils.h
index fd304a8bae15..6adeab0eb35a 100644
--- a/src/gstreamer/gstlibcamera-utils.h
+++ b/src/gstreamer/gstlibcamera-utils.h
@@ -25,6 +25,13 @@ void gst_libcamera_clamp_and_set_frameduration(libcamera::ControlList &controls,
 					       GstStructure *element_caps);
 void gst_libcamera_framerate_to_caps(GstCaps *caps, const GstStructure *element_caps);
 
+#if !GST_CHECK_VERSION(1, 16, 0)
+static inline void gst_clear_event(GstEvent **event_ptr)
+{
+	g_clear_pointer(event_ptr, gst_mini_object_unref);
+}
+#endif
+
 #if !GST_CHECK_VERSION(1, 17, 1)
 gboolean gst_task_resume(GstTask *task);
 #endif
-- 
Regards,

Laurent Pinchart