Start adding an audio scripting API, and also fix a deadlock in sfx_manager due to improper release of locks

src/audio/sfx_manager.cpp

@@ -939,7 +939,7 @@ SFXBase* SFXManager::quickSound(const std::string &sound_type)
 {
     if (!sfxAllowed()) return NULL;
 
-    m_quick_sounds.lock();
+    MutexLockerHelper lock(m_quick_sounds);
     std::map<std::string, SFXBase*>::iterator sound = 
                                      m_quick_sounds.getData().find(sound_type);
 
@@ -950,14 +950,12 @@ SFXBase* SFXManager::quickSound(const std::string &sound_type)
         if (new_sound == NULL) return NULL;
         new_sound->play();
         m_quick_sounds.getData()[sound_type] = new_sound;
-        m_quick_sounds.unlock();
         return new_sound;
     }
     else
     {
         SFXBase *base_sound = sound->second;
         base_sound->play();
-        m_quick_sounds.unlock();
         return base_sound;
     }
 

src/scriptengine/script_audio.cpp

@@ -0,0 +1,55 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2014-2015  SuperTuxKart Team
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#include "script_audio.hpp"
+#include "audio/sfx_manager.hpp"
+
+#include <angelscript.h>
+#include <assert.h>
+
+/** \cond DOXYGEN_IGNORE */
+namespace Scripting
+{
+    /** \endcond */
+
+    namespace Audio
+    {
+        /** \addtogroup Scripting
+        * @{
+        */
+        /** \addtogroup Audio
+        * @{
+        */
+        void playSound(const std::string* sound_name)
+        {
+            SFXManager::get()->quickSound(*sound_name);
+        }
+        /** @}*/
+        /** @}*/
+
+        void registerScriptFunctions(asIScriptEngine *engine)
+        {
+            int r; // of type asERetCodes
+            engine->SetDefaultNamespace("Audio");
+            r = engine->RegisterGlobalFunction("void playSound(const string &in)", asFUNCTION(playSound), asCALL_CDECL); assert(r >= 0);
+        }
+    }
+
+/** \cond DOXYGEN_IGNORE */
+}
+/** \endcond */

src/scriptengine/script_audio.hpp

@@ -0,0 +1,33 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2014-2015  SuperTuxKart Team
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#ifndef HEADER_SCRIPT_AUDIO_HPP
+#define HEADER_SCRIPT_AUDIO_HPP
+
+#include <angelscript.h>
+
+#include <string>
+
+namespace Scripting
+{
+    namespace Audio
+    {
+        void registerScriptFunctions(asIScriptEngine *engine);
+    }
+}
+#endif

src/scriptengine/script_engine.cpp

@@ -21,6 +21,7 @@
 #include "io/file_manager.hpp"
 #include "karts/kart.hpp"
 #include "modes/world.hpp"
+#include "scriptengine/script_audio.hpp"
 #include "scriptengine/script_challenges.hpp"
 #include "scriptengine/script_kart.hpp"
 #include "scriptengine/script_engine.hpp"
@@ -336,6 +337,7 @@ namespace Scripting
         Scripting::Utils::registerScriptFunctions(m_engine);
         Scripting::GUI::registerScriptFunctions(m_engine);
         Scripting::GUI::registerScriptEnums(m_engine);
+        Scripting::Audio::registerScriptFunctions(m_engine);
 
         // It is possible to register the functions, properties, and types in 
         // configuration groups as well. When compiling the scripts it can then