[Buildroot] [PATCH v6 10/16] package/opencv: add gstreamer-1.x support

[Samuel Martin <s.martin49@gmail.com>]

Starting with the 2.4.10 release, OpenCV supports both Gstreamer-0.10
and Gstreamer-1, but only one can be enabled at the same time (OpenCV
chooses Gstreamer-1 over Gstreamer-0.10 when both are available).

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Cc: "Yann E. MORIN" <yann.morin.1998@free.fr>

---
changes v5->v6:
- rebase
- use a choice

changes v4->v5:
- rebase
- update a/r/t tags
- rework gst-X backend selection (use similar structure for qt)
- remove patch merged upstream

changes v3->v4:
- new patch
---
 package/opencv/Config.in |  7 +++++++
 package/opencv/opencv.mk | 15 ++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/package/opencv/Config.in b/package/opencv/Config.in
index 4b571e0..f89e62d 100644
--- a/package/opencv/Config.in
+++ b/package/opencv/Config.in
@@ -186,6 +186,8 @@ choice
 	depends on BR2_USE_MMU # libglib2
 	depends on BR2_USE_WCHAR # libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
+	help
+	  OpenCV prefers gstreamer-1 over gstreamer-0.10.
 
 config BR2_PACKAGE_OPENCV_WITHOUT_GSTREAMER
 	bool "none"
@@ -196,6 +198,11 @@ config BR2_PACKAGE_OPENCV_WITH_GSTREAMER
 	select BR2_PACKAGE_GST_PLUGINS_BASE
 	select BR2_PACKAGE_GST_PLUGINS_BASE_PLUGIN_APP
 
+config BR2_PACKAGE_OPENCV_WITH_GSTREAMER1
+	bool "gstreamer-1.x"
+	select BR2_PACKAGE_GSTREAMER1
+	select BR2_PACKAGE_GST1_PLUGINS_BASE
+	select BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_APP
 
 endchoice
 
diff --git a/package/opencv/opencv.mk b/package/opencv/opencv.mk
index a43de0c..d249400 100644
--- a/package/opencv/opencv.mk
+++ b/package/opencv/opencv.mk
@@ -222,11 +222,20 @@ else
 OPENCV_CONF_OPTS += -DWITH_FFMPEG=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_OPENCV_WITH_GSTREAMER)$(BR2_PACKAGE_OPENCV_WITH_GSTREAMER1),)
+OPENCV_CONF_OPTS += -DWITH_GSTREAMER=OFF -DWITH_GSTREAMER_0_10=OFF
+endif
+
 ifeq ($(BR2_PACKAGE_OPENCV_WITH_GSTREAMER),y)
-OPENCV_CONF_OPTS += -DWITH_GSTREAMER=ON -DWITH_GSTREAMER_0_10=ON
+OPENCV_CONF_OPTS += -DWITH_GSTREAMER=OFF -DWITH_GSTREAMER_0_10=ON
 OPENCV_DEPENDENCIES += gstreamer gst-plugins-base
-else
-OPENCV_CONF_OPTS += -DWITH_GSTREAMER=OFF -DWITH_GSTREAMER_0_10=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_OPENCV_WITH_GSTREAMER1),y)
+OPENCV_CONF_OPTS += -DWITH_GSTREAMER=ON -DWITH_GSTREAMER_0_10=OFF
+OPENCV_DEPENDENCIES += gstreamer1 gst1-plugins-base
+endif
+
 endif
 
 ifeq ($(BR2_PACKAGE_OPENCV_WITH_GTK),y)
-- 
2.4.4