added cmake build files

libobs/CMakeLists.txt

@@ -0,0 +1,72 @@
+if(WIN32)
+	set(libobs_platform_src
+		obs-windows.c
+		util/platform-windows.c)
+elseif(APPLE AND UNIX)
+	set(libobs_platform_src
+		obs-cocoa.c
+		util/platform-cocoa.c)
+	add_definitions("-DHAVE_STRTOLL")
+	find_library(COCOA Cocoa)
+	mark_as_advanced(COCOA)
+	include_directories(${COCOA})
+	link_libraries(${COCOA})
+else()
+endif()
+
+find_package(Libavutil REQUIRED)
+include_directories(${LIBAVUTIL_INCLUDE_DIRS})
+
+find_package(Libswresample REQUIRED)
+include_directories(${LIBSWRESAMPLE_INCLUDE_DIRS})
+
+add_library(libobs SHARED
+		obs.c
+		obs-display.c
+		obs-module.c
+		obs-output.c
+		obs-scene.c
+		obs-source.c
+		obs-video.c
+		util/base.c
+		util/bmem.c
+		util/cf-lexer.c
+		util/cf-parser.c
+		util/config-file.c
+		util/dstr.c
+		util/lexer.c
+		util/platform.c
+		util/text-lookup.c
+		util/utf8.c
+		media-io/audio-io.c
+		media-io/format-conversion.c
+		media-io/audio-resampler-ffmpeg.c
+		media-io/media-io.c
+		media-io/video-io.c
+		graphics/axisang.c
+		graphics/bounds.c
+		graphics/effect.c
+		graphics/effect-parser.c
+		graphics/graphics.c
+		graphics/graphics-imports.c
+		graphics/math-extra.c
+		graphics/matrix3.c
+		graphics/matrix4.c
+		graphics/plane.c
+		graphics/quat.c
+		graphics/shader-parser.c
+		graphics/texture-render.c
+		graphics/vec2.c
+		graphics/vec3.c
+		graphics/vec4.c
+		${libobs_platform_src})
+
+set_target_properties(libobs
+	PROPERTIES OUTPUT_NAME obs)
+
+target_link_libraries(libobs
+	${LIBAVUTIL_LIBRARIES}
+	${LIBSWRESAMPLE_LIBRARIES})
+
+file(COPY ${obs_SOURCE_DIR}/build/libobs/default.effect DESTINATION
+	${obs_BINARY_DIR}/libobs/)