CMake: move modules from CMakeTests/ -> CMake/

The name "CMakeTests" is inaccurate and irregular.

CMake/CheckLib.cmake

@@ -0,0 +1,126 @@
+find_package(PkgConfig)
+
+macro(_internal_message msg)
+	if(NOT ${_is_quiet})
+		message(STATUS "${msg}")
+	endif()
+endmacro()
+
+macro(check_lib var pc lib)
+	set(_is_required 0)
+	set(_is_quiet 0)
+	set(_arg_list ${ARGN})
+	foreach(_arg ${ARGN})
+		if(_arg STREQUAL "REQUIRED")
+			list(REMOVE_ITEM _arg_list "REQUIRED")
+			set(_is_required 1)
+		endif()
+		if(_arg STREQUAL "QUIET")
+			list(REMOVE_ITEM _arg_list "QUIET")
+			set(_is_quiet 1)
+		endif()
+	endforeach()
+
+	if(PKG_CONFIG_FOUND AND NOT ${var}_FOUND)
+		pkg_search_module(${var} QUIET ${pc})
+	endif()
+
+	if(${var}_FOUND)
+		if(${var}_INCLUDE_DIRS)
+			include_directories(${${var}_INCLUDE_DIRS})
+		endif()
+		# Make sure include directories for headers found using find_path below
+		# are re-added when reconfiguring
+		if(${var}_INCLUDE)
+			include_directories(${${var}_INCLUDE})
+		endif()
+		_internal_message("${lib} found")
+	else()
+		find_library(${var} ${lib})
+		if(_arg_list)
+			find_path(${var}_INCLUDE ${_arg_list})
+		else()
+			set(${var}_INCLUDE FALSE)
+		endif()
+		if(${var} AND ${var}_INCLUDE)
+			include_directories(${${var}_INCLUDE})
+			_internal_message("${lib} found")
+			set(${var}_FOUND 1 CACHE INTERNAL "")
+		else()
+			if(_is_required)
+				message(FATAL_ERROR "${lib} is required but not found")
+			else()
+				_internal_message("${lib} not found")
+			endif()
+		endif()
+	endif()
+endmacro()
+
+macro(check_libav)
+	if(PKG_CONFIG_FOUND)
+		pkg_check_modules(LIBAV libavcodec>=54.35.0 libavformat>=54.20.4
+			libswscale>=2.1.1 libavutil>=52.3.0)
+	else()
+		if(WIN32)
+			add_library(avcodec STATIC IMPORTED)
+			set_target_properties(avcodec PROPERTIES
+				INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/include
+				IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/lib/avcodec.lib
+			)
+
+			add_library(avformat STATIC IMPORTED)
+			set_target_properties(avformat PROPERTIES
+				INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/include
+				IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/lib/avformat.lib
+			)
+
+			add_library(avutil STATIC IMPORTED)
+			set_target_properties(avutil PROPERTIES
+				INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/include
+				IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/lib/avutil.lib
+			)
+
+			add_library(swresample STATIC IMPORTED)
+			set_target_properties(swresample PROPERTIES
+				INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/include
+				IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/lib/swresample.lib
+			)
+
+			add_library(swscale STATIC IMPORTED)
+			set_target_properties(swscale PROPERTIES
+				INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/include
+				IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/Externals/ffmpeg/lib/swscale.lib
+			)
+
+			set(LIBAV_FOUND ON)
+			set(LIBAV_LIBRARIES avcodec avformat avutil swresample swscale)
+		else()
+			# Attempt to find it through static means
+			set(LIBAV_LDFLAGS avformat avcodec swscale avutil)
+			set(CMAKE_REQUIRED_LIBRARIES ${LIBAV_LDFLAGS})
+			CHECK_CXX_SOURCE_COMPILES(
+				"extern \"C\" {
+				#include <libavcodec/avcodec.h>
+				#include <libavformat/avformat.h>
+				#include <libavutil/mathematics.h>
+				#include <libswscale/swscale.h>
+				}
+				int main(int argc, char **argv)
+				{
+					av_register_all();
+					return 0;
+				}"
+				LIBAV_FOUND)
+			unset(CMAKE_REQUIRED_LIBRARIES)
+	  endif()
+	endif()
+	if(LIBAV_FOUND)
+		message(STATUS "libav/ffmpeg found, enabling AVI frame dumps")
+		add_definitions(-DHAVE_LIBAV)
+		if(LIBAV_INCLUDE_DIRS)
+			include_directories(${LIBAV_INCLUDE_DIRS})
+		endif()
+	else()
+		message(STATUS "libav/ffmpeg not found, disabling AVI frame dumps")
+	endif()
+endmacro()