Audaspace: add support for WASAPI on Windows

This adds WASAPI as audio backend on Windows.
WASAPI is the modern standard audio API on
Windows introduced with Windows Vista.

Ref T86590

CMakeLists.txt

@@ -317,6 +317,11 @@ if(UNIX AND NOT APPLE)
 else()
   set(WITH_PULSEAUDIO OFF)
 endif()
+if(WIN32)
+  option(WITH_WASAPI      "Enable Windows Audio Sessions API for audio support on Windows" ON)
+else()
+  set(WITH_WASAPI OFF)
+endif()
 
 # Compression
 option(WITH_LZO           "Enable fast LZO compression (used for pointcache)" ON)
@@ -682,6 +687,7 @@ endif()
 set_and_warn_dependency(WITH_AUDASPACE WITH_OPENAL OFF)
 set_and_warn_dependency(WITH_AUDASPACE WITH_JACK OFF)
 set_and_warn_dependency(WITH_AUDASPACE WITH_PULSEAUDIO OFF)
+set_and_warn_dependency(WITH_AUDASPACE WITH_WASAPI OFF)
 
 if(NOT WITH_SDL AND WITH_GHOST_SDL)
   message(FATAL_ERROR "WITH_GHOST_SDL requires WITH_SDL")
@@ -1946,6 +1952,7 @@ if(FIRST_RUN)
   info_cfg_option(WITH_SDL_DYNLOAD)
   info_cfg_option(WITH_PULSEAUDIO)
   info_cfg_option(WITH_PULSEAUDIO_DYNLOAD)
+  info_cfg_option(WITH_WASAPI)
 
   info_cfg_text("Compression:")
   info_cfg_option(WITH_LZMA)