Added SDL Mixer X to CMAKE (Windows only)

src/CMakeLists.txt

@@ -226,6 +226,12 @@ set(SRB2_CONFIG_HAVE_GME ON CACHE BOOL
 	"Enable GME support.")
 set(SRB2_CONFIG_HAVE_OPENMPT ON CACHE BOOL
 	"Enable OpenMPT support.")
+if(${CMAKE_SYSTEM} MATCHES Windows)
+	set(SRB2_CONFIG_HAVE_MIXERX ON CACHE BOOL
+		"Enable SDL Mixer X support.")
+else()
+	set(SRB2_CONFIG_HAVE_MIXERX OFF)
+endif()
 set(SRB2_CONFIG_HWRENDER ON CACHE BOOL
 	"Enable hardware rendering through OpenGL.")
 set(SRB2_CONFIG_USEASM OFF CACHE BOOL
@@ -366,6 +372,30 @@ if(${SRB2_CONFIG_HAVE_OPENMPT})
 	endif()
 endif()
 
+if(${SRB2_CONFIG_HAVE_MIXERX})
+	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
+		set(MIXERX_FOUND ON)
+		set(MIXERX_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDLMixerX/i686-w64-mingw32/include/SDL2)
+        if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(MIXERX_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDLMixerX/x86_64-w64-mingw32/lib -lSDL2_mixer_ext")
+		else() # 32-bit
+			set(MIXERX_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDLMixerX/i686-w64-mingw32/lib -lSDL2_mixer_ext")
+		endif()
+	else()
+		# No support for non-Windows (yet?)
+		#find_package(MIXERX)
+		message(WARNING "SDL Mixer X is not supported as an external library.")
+		set(MIXERX_FOUND OFF)
+	endif()
+	if(${MIXERX_FOUND})
+		set(SRB2_HAVE_MIXERX ON)
+		set(SRB2_SDL2_SOUNDIMPL mixer_sound.c)
+		add_definitions(-DHAVE_MIXERX)
+	else()
+		message(WARNING "You have specified that SDL Mixer X is available but it was not found.")
+	endif()
+endif()
+
 if(${SRB2_CONFIG_HAVE_ZLIB})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 		set(ZLIB_FOUND ON)

src/sdl/CMakeLists.txt

 # Declare SDL2 interface sources
 
-set(SRB2_CONFIG_SDL2_USEMIXER ON CACHE BOOL "Use SDL2_mixer or regular sdl sound")
+if(NOT ${SRB2_CONFIG_HAVE_MIXERX})
+	set(SRB2_CONFIG_SDL2_USEMIXER ON CACHE BOOL "Use SDL2_mixer or regular sdl sound")
+else()
+	set(SRB2_CONFIG_SDL2_USEMIXER OFF)
+endif()
 
 if(${SRB2_CONFIG_SDL2_USEMIXER})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
@@ -22,6 +26,8 @@ if(${SRB2_CONFIG_SDL2_USEMIXER})
 		message(WARNING "You specified that SDL2_mixer is available, but it was not found. Falling back to sdl sound.")
 		set(SRB2_SDL2_SOUNDIMPL sdl_sound.c)
 	endif()
+elseif(${MIXERX_FOUND})
+	set(SRB2_SDL2_SOUNDIMPL mixer_sound.c)
 else()
 	set(SRB2_SDL2_SOUNDIMPL sdl_sound.c)
 endif()
@@ -156,6 +162,7 @@ if(${SDL2_FOUND})
 			SDL2_mixer
 			${GME_LIBRARIES}
 			${OPENMPT_LIBRARIES}
+			${MIXERX_LIBRARIES}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
 			${OPENGL_LIBRARIES}
@@ -167,6 +174,7 @@ if(${SDL2_FOUND})
 			${SDL2_MIXER_LIBRARIES}
 			${GME_LIBRARIES}
 			${OPENMPT_LIBRARIES}
+			${MIXERX_LIBRARIES}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
 			${OPENGL_LIBRARIES}
@@ -247,12 +255,13 @@ if(${SDL2_FOUND})
 		${SDL2_MIXER_INCLUDE_DIRS}
 		${GME_INCLUDE_DIRS}
 		${OPENMPT_INCLUDE_DIRS}
+		${MIXERX_INCLUDE_DIRS}
 		${PNG_INCLUDE_DIRS}
 		${ZLIB_INCLUDE_DIRS}
 		${OPENGL_INCLUDE_DIRS}
 	)
 
-	if(${SRB2_HAVE_MIXER})
+	if((${SRB2_HAVE_MIXER}) OR (${SRB2_HAVE_MIXERX}))
 		target_compile_definitions(SRB2SDL2 PRIVATE -DHAVE_MIXER -DSOUND=SOUND_MIXER)
 	endif()
 
@@ -294,6 +303,7 @@ if(${SDL2_FOUND})
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/bin
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/bin
 							HINTS ${CMAKE_SOURCE_DIR}/libs/libopenmpt/bin/x86_64/mingw
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDLMixerX/x86_64-w64-mingw32/bin
 						)
 					else()
 						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
@@ -301,6 +311,7 @@ if(${SDL2_FOUND})
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/bin
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/bin
 							HINTS ${CMAKE_SOURCE_DIR}/libs/libopenmpt/bin/x86/mingw
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDLMixerX/i686-w64-mingw32/bin
 						)
 					endif()
 				else()
@@ -310,6 +321,7 @@ if(${SDL2_FOUND})
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/lib/x64
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/lib/x64
 							HINTS ${CMAKE_SOURCE_DIR}/libs/libopenmpt/bin/x86_64/mingw
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDLMixerX/x86_64-w64-mingw32/bin
 						)
 					else()
 						find_library(SRB2_SDL2_DLL_${dllname} "${defaultname}"
@@ -317,6 +329,7 @@ if(${SDL2_FOUND})
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2/lib/x86
 							HINTS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/lib/x86
 							HINTS ${CMAKE_SOURCE_DIR}/libs/libopenmpt/bin/x86/mingw
+							HINTS ${CMAKE_SOURCE_DIR}/libs/SDLMixerX/i686-w64-mingw32/bin
 						)
 					endif()
 				endif()
@@ -340,6 +353,12 @@ if(${SDL2_FOUND})
 		if(${SRB2_CONFIG_HAVE_OPENMPT})
 			getwinlib(libopenmpt "libopenmpt.dll")
 		endif()
+		if(${SRB2_CONFIG_HAVE_MIXERX})
+			getwinlib(SDL2_mixer_ext "SDL2_mixer_ext.dll")
+			getwinlib(libfluidsynth-2 "libfluidsynth-2.dll")
+			getwinlib(libgcc_s_sjlj-1 "libgcc_s_sjlj-1.dll")
+			getwinlib(libstdc++-6 "libstdc++-6.dll")
+		endif()
 
 		install(PROGRAMS
 			${win_extra_dll_list}