Add cmake buildsystem

CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.10)
+project(gst-plugin-viperfx)
+
+include_directories(.)
+include_directories(src)
+find_package(PkgConfig)
+
+pkg_check_modules(GST REQUIRED gstreamer-1.0>=1.0
+        gstreamer-base-1.0>=1.0
+        gstreamer-controller-1.0>=1.0
+        gstreamer-audio-1.0>=1.0)
+
+file(GLOB SOURCES
+        src/*.h
+        src/*.c
+        )
+
+add_library(gst-plugin-viperfx SHARED ${SOURCES})
+
+target_include_directories(gst-plugin-viperfx PUBLIC ${GST_INCLUDE_DIRS})
+target_compile_options(gst-plugin-viperfx PUBLIC ${GST_CFLAGS})
+target_link_libraries(gst-plugin-viperfx ${GST_LIBRARIES} pthread)