Split the lib in smaller libs to ease unit tests

src/libs/av/CMakeLists.txt

@@ -0,0 +1,24 @@
+
+add_library(lmsav SHARED
+	impl/AvInfo.cpp
+	impl/AvTranscoder.cpp
+	impl/AvTypes.cpp
+	)
+
+target_include_directories(lmsav INTERFACE
+	include
+	)
+
+target_include_directories(lmsav PRIVATE
+	include/
+	)
+
+# TODO make these private
+target_link_libraries(lmsav PUBLIC
+	lmsutils
+	avformat
+	avutil
+	)
+
+install(TARGETS lmsav DESTINATION lib)
+