Restrict OpenSLES to Android via CMake

Source/Core/AudioCommon/CMakeLists.txt

@@ -18,14 +18,17 @@ add_library(audiocommon
   WaveFile.h
 )
 
-find_package(OpenSLES)
-if(OPENSLES_FOUND)
+if(ANDROID)
+  find_package(OpenSLES)
+  if(OPENSLES_FOUND)
     message(STATUS "OpenSLES found, enabling OpenSLES sound backend")
     target_sources(audiocommon PRIVATE
       OpenSLESStream.cpp
       OpenSLESStream.h
     )
     target_link_libraries(audiocommon PRIVATE OpenSLES::OpenSLES)
+    target_compile_definitions(audiocommon PRIVATE HAVE_OPENSL_ES=1)
+  endif()
 endif()
 
 if(ENABLE_ALSA)

Source/Core/AudioCommon/OpenSLESStream.cpp

@@ -1,7 +1,7 @@
 // Copyright 2013 Dolphin Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#ifdef ANDROID
+#ifdef HAVE_OPENSL_ES
 #include "AudioCommon/OpenSLESStream.h"
 
 #include <cmath>
@@ -143,4 +143,4 @@ void OpenSLESStream::SetVolume(int volume)
       volume <= 0 ? SL_MILLIBEL_MIN : static_cast<SLmillibel>(2000 * std::log10(volume / 100.0f));
   (*bqPlayerVolume)->SetVolumeLevel(bqPlayerVolume, attenuation);
 }
-#endif
+#endif  // HAVE_OPENSL_ES

Source/Core/AudioCommon/OpenSLESStream.h

@@ -10,7 +10,7 @@
 
 class OpenSLESStream final : public SoundStream
 {
-#ifdef ANDROID
+#ifdef HAVE_OPENSL_ES
 public:
   ~OpenSLESStream() override;
   bool Init() override;
@@ -21,5 +21,5 @@ public:
 private:
   std::thread thread;
   Common::Event soundSyncEvent;
-#endif  // HAVE_OPENSL
+#endif  // HAVE_OPENSL_ES
 };