Move Sound_Output's definition to a separate header

apps/openmw/mwsound/openal_output.cpp

@@ -1,3 +1,6 @@
+#include <stdexcept>
+#include <iostream>
+
 #include "openal_output.hpp"
 
 namespace MWSound

apps/openmw/mwsound/openal_output.hpp

@@ -1,13 +1,17 @@
 #ifndef GAME_SOUND_OPENAL_OUTPUT_H
 #define GAME_SOUND_OPENAL_OUTPUT_H
 
-#include "soundmanager.hpp"
+#include <string>
 
 #include "alc.h"
 #include "al.h"
 
+#include "sound_output.hpp"
+
 namespace MWSound
 {
+    class SoundManager;
+
     class OpenAL_Output : public Sound_Output
     {
         ALCdevice *Device;

apps/openmw/mwsound/sound_output.hpp

@@ -0,0 +1,26 @@
+#ifndef GAME_SOUND_SOUND_OUTPUT_H
+#define GAME_SOUND_SOUND_OUTPUT_H
+
+#include <string>
+
+namespace MWSound
+{
+    class SoundManager;
+
+    class Sound_Output
+    {
+        SoundManager &mgr;
+
+        virtual bool Initialize(const std::string &devname="") = 0;
+        virtual void Deinitialize() = 0;
+
+        Sound_Output(SoundManager &mgr) : mgr(mgr) { }
+    public:
+        virtual ~Sound_Output() { }
+
+        friend class OpenAL_Output;
+        friend class SoundManager;
+    };
+}
+
+#endif

apps/openmw/mwsound/soundmanager.cpp

@@ -12,6 +12,7 @@
 #include "../mwworld/world.hpp"
 #include "../mwworld/player.hpp"
 
+#include "sound_output.hpp"
 #include "sound_decoder.hpp"
 
 #include "openal_output.hpp"

apps/openmw/mwsound/soundmanager.hpp

@@ -123,21 +123,6 @@ namespace MWSound
 
         void update(float duration);
     };
-
-    class Sound_Output
-    {
-        SoundManager &mgr;
-
-        virtual bool Initialize(const std::string &devname="") = 0;
-        virtual void Deinitialize() = 0;
-
-        Sound_Output(SoundManager &mgr) : mgr(mgr) { }
-    public:
-        virtual ~Sound_Output() { }
-
-        friend class OpenAL_Output;
-        friend class SoundManager;
-    };
 }
 
 #endif