libopenmax: Add libopenmax virtual package

this adds the libopenmax virtual package for hardware based video acceleration

[Peter: fix openmax-without-any-backends check]
Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/multimedia/bellagio/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_BELLAGIO
 	bool "bellagio"
 	depends on BR2_INSTALL_LIBSTDCPP
+	select BR2_PACKAGE_HAS_OPENMAX
 	help
 	  Bellagio is an opensource implementation of the
 	  OpenMAX IL API.

package/opengl/Config.in

@@ -6,3 +6,6 @@ config BR2_PACKAGE_HAS_OPENGL_ES
 
 config BR2_PACKAGE_HAS_OPENVG
 	bool
+
+config BR2_PACKAGE_HAS_OPENMAX
+	bool

package/opengl/libopenmax/libopenmax.mk

@@ -0,0 +1,24 @@
+#############################################################
+#
+# Virtual package for libopenmax
+#
+#############################################################
+
+LIBOPENMAX_SOURCE =
+
+ifeq ($(BR2_PACKAGE_RPI_USERLAND),y)
+LIBOPENMAX_DEPENDENCIES += rpi-userland
+endif
+
+ifeq ($(BR2_PACKAGE_BELLAGIO),y)
+LIBOPENMAX_DEPENDENCIES += bellagio
+endif
+
+ifeq ($(LIBOPENMAX_DEPENDENCIES),)
+define LIBOPENMAX_CONFIGURE_CMDS
+	echo "No libopenmax implementation selected. Configuration error."
+	exit 1
+endef
+endif
+
+$(eval $(generic-package))

package/rpi-userland/Config.in

@@ -6,6 +6,7 @@ config BR2_PACKAGE_RPI_USERLAND
 	select BR2_PACKAGE_HAS_OPENGL_EGL
 	select BR2_PACKAGE_HAS_OPENGL_ES
 	select BR2_PACKAGE_HAS_OPENVG
+	select BR2_PACKAGE_HAS_OPENMAX
 	help
 	  Raspberry Pi Userland contains the necessary library to use the
 	  VideoCore driver.