Modularized Linuxmoto port.

svn-id: r50474

13 files changed, 238 insertions, 121 deletions

diff --git a/backends/platform/linuxmoto/linuxmoto-events.cpp b/backends/events/linuxmotosdl/linuxmotosdl-events.cpp
index 379e34b7ac..f27042ea5d 100644
--- a/backends/platform/linuxmoto/linuxmoto-events.cpp
+++ b/backends/events/linuxmotosdl/linuxmotosdl-events.cpp
@@ -23,8 +23,46 @@
  *
  */
 
+#if defined(LINUXMOTO)
+
+#include "backends/events/linuxmotosdl/linuxmotosdl-events.h"
 #include "backends/platform/linuxmoto/linuxmoto-sdl.h"
-#include "graphics/scaler/aspect.h"	// for aspect2Real
+
+enum {
+	GFX_HALF = 12
+};
+
+LinuxmotoSdlEventManager::LinuxmotoSdlEventManager(Common::EventSource *boss)
+	:
+	SdlEventManager(boss) {
+
+}
+
+LinuxmotoSdlEventManager::~LinuxmotoSdlEventManager() {
+
+}
+
+void LinuxmotoSdlEventManager::preprocessEvents(SDL_Event *event) {
+	if (event->type == SDL_ACTIVEEVENT) {
+		if (event->active.state == SDL_APPINPUTFOCUS && !event->active.gain) {
+			((OSystem_SDL* )g_system)->getMixerManager()->suspendAudio();
+			for (;;) {
+				if (!SDL_WaitEvent(event)) {
+					SDL_Delay(10);
+					continue;
+				}
+				if (event->type == SDL_QUIT)
+					return;
+				if (event->type != SDL_ACTIVEEVENT)
+					continue;
+				if (event->active.state == SDL_APPINPUTFOCUS && event->active.gain) {
+					((OSystem_SDL* )g_system)->getMixerManager()->resumeAudio();
+					return;
+				}
+			}
+		}
+	}
+}
 
 static int mapKey(SDLKey key, SDLMod mod, Uint16 unicode) {
 	if (key >= SDLK_F1 && key <= SDLK_F9) {
@@ -43,29 +81,9 @@ static int mapKey(SDLKey key, SDLMod mod, Uint16 unicode) {
 	return key;
 }
 
-void OSystem_LINUXMOTO::fillMouseEvent(Common::Event &event, int x, int y) {
-	if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
-		event.mouse.x = x*2;
-		event.mouse.y = y*2;
-	} else {
-		event.mouse.x = x;
-		event.mouse.y = y;
-	}
-
-	// Update the "keyboard mouse" coords
-	_km.x = x;
-	_km.y = y;
+bool LinuxmotoSdlEventManager::remapKey(SDL_Event &ev, Common::Event &event) {
+	if (false) {}
 
-	// Adjust for the screen scaling
-	if (!_overlayVisible) {
-		event.mouse.x /= _videoMode.scaleFactor;
-		event.mouse.y /= _videoMode.scaleFactor;
-		if (_videoMode.aspectRatioCorrection)
-			event.mouse.y = aspect2Real(event.mouse.y);
-	}
-}
-
-bool OSystem_LINUXMOTO::remapKey(SDL_Event &ev, Common::Event &event) {
 	//  Motorol A1200/E6/A1600 remapkey by Lubomyr
 #ifdef MOTOEZX
 	// Quit on MOD+Camera Key on A1200
@@ -226,3 +244,5 @@ bool OSystem_LINUXMOTO::remapKey(SDL_Event &ev, Common::Event &event) {
 
 	return false;
 }
+
+#endif
diff --git a/backends/events/linuxmotosdl/linuxmotosdl-events.h b/backends/events/linuxmotosdl/linuxmotosdl-events.h
new file mode 100644
index 0000000000..d7ad715adb
--- /dev/null
+++ b/backends/events/linuxmotosdl/linuxmotosdl-events.h
@@ -0,0 +1,41 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 2
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if !defined(BACKEND_EVENTS_SDL_LINUXMOTO_H) && !defined(DISABLE_DEFAULT_EVENTMANAGER)
+#define BACKEND_EVENTS_SDL_LINUXMOTO_H
+
+#include "backends/events/sdl/sdl-events.h"
+
+class LinuxmotoSdlEventManager : public SdlEventManager {
+public:
+	LinuxmotoSdlEventManager(Common::EventSource *boss);
+	virtual ~LinuxmotoSdlEventManager();
+
+protected:
+	virtual void preprocessEvents(SDL_Event *event);
+	virtual bool remapKey(SDL_Event &ev, Common::Event &event);
+};
+
+#endif
diff --git a/backends/events/sdl/sdl-events.h b/backends/events/sdl/sdl-events.h
index 7a399cc186..0f6cb998a8 100644
--- a/backends/events/sdl/sdl-events.h
+++ b/backends/events/sdl/sdl-events.h
@@ -43,6 +43,8 @@ public:
 
 	virtual void resetKeyboadEmulation(int16 x_max, int16 y_max);
 
+	virtual void toggleMouseGrab();
+
 protected:
 	virtual void preprocessEvents(SDL_Event *event) {}
 
@@ -77,8 +79,7 @@ protected:
 	virtual bool handleJoyButtonUp(SDL_Event &ev, Common::Event &event);
 	virtual bool handleJoyAxisMotion(SDL_Event &ev, Common::Event &event);
 
-	virtual void fillMouseEvent(Common::Event &event, int x, int y); // overloaded by CE backend
-	virtual void toggleMouseGrab();
+	virtual void fillMouseEvent(Common::Event &event, int x, int y);
 
 	virtual void handleKbdMouse();
 	virtual bool remapKey(SDL_Event &ev, Common::Event &event);
diff --git a/backends/platform/linuxmoto/linuxmoto-graphics.cpp b/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.cpp
index a39416ebc4..373bdc2346 100644
--- a/backends/platform/linuxmoto/linuxmoto-graphics.cpp
+++ b/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.cpp
@@ -23,8 +23,10 @@
  *
  */
 
-#include "backends/platform/linuxmoto/linuxmoto-sdl.h"
+#ifdef LINUXMOTO 
 
+#include "backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h"
+#include "backends/events/linuxmotosdl/linuxmotosdl-events.h"
 #include "common/mutex.h"
 #include "graphics/font.h"
 #include "graphics/fontman.h"
@@ -33,22 +35,33 @@
 #include "graphics/scaler/downscaler.h"
 #include "graphics/surface.h"
 
+enum {
+	GFX_HALF = 12
+};
+
 static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
 	{"1x", "Fullscreen", GFX_NORMAL},
 	{"½x", "Downscale", GFX_HALF},
 	{0, 0, 0}
 };
 
+LinuxmotoSdlGraphicsManager::LinuxmotoSdlGraphicsManager() {
+
+}
+
+LinuxmotoSdlGraphicsManager::~LinuxmotoSdlGraphicsManager() {
+
+}
 
-const OSystem::GraphicsMode *OSystem_LINUXMOTO::getSupportedGraphicsModes() const {
+const OSystem::GraphicsMode *LinuxmotoSdlGraphicsManager::getSupportedGraphicsModes() const {
 	return s_supportedGraphicsModes;
 }
 
-int OSystem_LINUXMOTO::getDefaultGraphicsMode() const {
+int LinuxmotoSdlGraphicsManager::getDefaultGraphicsMode() const {
 	return GFX_NORMAL;
 }
 
-bool OSystem_LINUXMOTO::setGraphicsMode(int mode) {
+bool LinuxmotoSdlGraphicsManager::setGraphicsMode(int mode) {
 	Common::StackLock lock(_graphicsMutex);
 
 	assert(_transactionMode == kTransactionActive);
@@ -82,7 +95,7 @@ bool OSystem_LINUXMOTO::setGraphicsMode(int mode) {
 	return true;
 }
 
-void OSystem_LINUXMOTO::setGraphicsModeIntern() {
+void LinuxmotoSdlGraphicsManager::setGraphicsModeIntern() {
 	Common::StackLock lock(_graphicsMutex);
 	ScalerProc *newScalerProc = 0;
 
@@ -112,7 +125,7 @@ void OSystem_LINUXMOTO::setGraphicsModeIntern() {
 }
 
 
-void OSystem_LINUXMOTO::initSize(uint w, uint h) {
+void LinuxmotoSdlGraphicsManager::initSize(uint w, uint h) {
 	assert(_transactionMode == kTransactionActive);
 
 	// Avoid redundant res changes
@@ -125,13 +138,13 @@ void OSystem_LINUXMOTO::initSize(uint w, uint h) {
 	if	(w > 320 || h > 240) {
 		setGraphicsMode(GFX_HALF);
 		setGraphicsModeIntern();
-		toggleMouseGrab();
+		((LinuxmotoSdlEventManager *)g_system->getEventManager())->toggleMouseGrab();
 	}
 
 	_transactionDetails.sizeChanged = true;
 }
 
-bool OSystem_LINUXMOTO::loadGFXMode() {
+bool LinuxmotoSdlGraphicsManager::loadGFXMode() {
 	printf("Game ScreenMode = %d*%d\n",_videoMode.screenWidth, _videoMode.screenHeight);
 	if (_videoMode.screenWidth > 320 || _videoMode.screenHeight > 240) {
 		_videoMode.aspectRatioCorrection = false;
@@ -157,10 +170,10 @@ bool OSystem_LINUXMOTO::loadGFXMode() {
 		_videoMode.hardwareHeight = effectiveScreenHeight();
 	}
 
-	return OSystem_SDL::loadGFXMode();
+	return SdlGraphicsManager::loadGFXMode();
 }
 
-void OSystem_LINUXMOTO::drawMouse() {
+void LinuxmotoSdlGraphicsManager::drawMouse() {
 	if (!_mouseVisible || !_mouseSurface) {
 		_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
 		return;
@@ -226,7 +239,7 @@ void OSystem_LINUXMOTO::drawMouse() {
 	addDirtyRect(dst.x, dst.y, dst.w, dst.h, true);
 }
 
-void OSystem_LINUXMOTO::undrawMouse() {
+void LinuxmotoSdlGraphicsManager::undrawMouse() {
 	const int x = _mouseBackup.x;
 	const int y = _mouseBackup.y;
 
@@ -244,13 +257,13 @@ void OSystem_LINUXMOTO::undrawMouse() {
 	}
 }
 
-void OSystem_LINUXMOTO::internUpdateScreen() {
+void LinuxmotoSdlGraphicsManager::internUpdateScreen() {
 	SDL_Surface *srcSurf, *origSurf;
 	int height, width;
 	ScalerProc *scalerProc;
 	int scale1;
 
-#if defined (DEBUG) && ! defined(_WIN32_WCE) // definitions not available for non-DEBUG here. (needed this to compile in SYMBIAN32 & linux?)
+#if defined (DEBUG) // definitions not available for non-DEBUG here. (needed this to compile in SYMBIAN32 & linux?)
 	assert(_hwscreen != NULL);
 	assert(_hwscreen->map->sw_data != NULL);
 #endif
@@ -443,28 +456,43 @@ void OSystem_LINUXMOTO::internUpdateScreen() {
 	_mouseNeedsRedraw = false;
 }
 
-void OSystem_LINUXMOTO::showOverlay() {
+void LinuxmotoSdlGraphicsManager::showOverlay() {
 	if (_videoMode.mode == GFX_HALF) {
 		_mouseCurState.x = _mouseCurState.x / 2;
 		_mouseCurState.y = _mouseCurState.y / 2;
 	}
-	OSystem_SDL::showOverlay();
+	SdlGraphicsManager::showOverlay();
 }
 
-void OSystem_LINUXMOTO::hideOverlay() {
+void LinuxmotoSdlGraphicsManager::hideOverlay() {
 	if (_videoMode.mode == GFX_HALF) {
 		_mouseCurState.x = _mouseCurState.x * 2;
 		_mouseCurState.y = _mouseCurState.y * 2;
 	}
-	OSystem_SDL::hideOverlay();
+	SdlGraphicsManager::hideOverlay();
 }
 
-void OSystem_LINUXMOTO::warpMouse(int x, int y) {
+void LinuxmotoSdlGraphicsManager::warpMouse(int x, int y) {
 	if (_mouseCurState.x != x || _mouseCurState.y != y) {
 		if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
 			x = x / 2;
 			y = y / 2;
 		}
 	}
-	OSystem_SDL::warpMouse(x, y);
+	SdlGraphicsManager::warpMouse(x, y);
 }
+
+void LinuxmotoSdlGraphicsManager::adjustMouseEvent(Common::Event &event) {
+	if (!_overlayVisible) {
+		if (_videoMode.mode == GFX_HALF) {
+			event.mouse.x *= 2;
+			event.mouse.y *= 2;
+		}
+		event.mouse.x /= _videoMode.scaleFactor;
+		event.mouse.y /= _videoMode.scaleFactor;
+		if (_videoMode.aspectRatioCorrection)
+			event.mouse.y = aspect2Real(event.mouse.y);
+	}
+}
+
+#endif
diff --git a/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h b/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h
new file mode 100644
index 0000000000..186e2a083b
--- /dev/null
+++ b/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h
@@ -0,0 +1,51 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 2
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_GRAPHICS_SDL_LINUXMOTO_H
+#define BACKENDS_GRAPHICS_SDL_LINUXMOTO_H
+
+#include "backends/graphics/sdl/sdl-graphics.h"
+
+class LinuxmotoSdlGraphicsManager : public SdlGraphicsManager {
+public:
+	LinuxmotoSdlGraphicsManager();
+	virtual ~LinuxmotoSdlGraphicsManager();
+
+	virtual void initSize(uint w, uint h);
+	virtual void setGraphicsModeIntern();
+	virtual bool setGraphicsMode(int mode);
+	virtual void internUpdateScreen();
+	virtual const OSystem::GraphicsMode *getSupportedGraphicsModes() const;
+	virtual int getDefaultGraphicsMode() const;
+	virtual bool loadGFXMode();
+	virtual void drawMouse();
+	virtual void undrawMouse();
+	virtual void showOverlay();
+	virtual void hideOverlay();
+	virtual void warpMouse(int x, int y);
+	virtual void adjustMouseEvent(Common::Event &event);
+};
+
+#endif
diff --git a/backends/mixer/sdl/sdl-mixer.cpp b/backends/mixer/sdl/sdl-mixer.cpp
index aa87fcb345..2317a03335 100644
--- a/backends/mixer/sdl/sdl-mixer.cpp
+++ b/backends/mixer/sdl/sdl-mixer.cpp
@@ -35,7 +35,8 @@
 
 SdlMixerManager::SdlMixerManager()
 	:
-	_mixer(0) {
+	_mixer(0),
+	_audioSuspended(false) {
 
 }
 
@@ -120,4 +121,20 @@ void SdlMixerManager::sdlCallback(void *this_, byte *samples, int len) {
 	manager->callbackHandler(samples, len);
 }
 
+void SdlMixerManager::suspendAudio() {
+	SDL_CloseAudio();
+	_audioSuspended = true;
+}
+
+int SdlMixerManager::resumeAudio() {
+	if (!_audioSuspended)
+		return -2;
+	if (SDL_OpenAudio(&_obtainedRate, NULL) < 0){
+		return -1;
+	}
+	SDL_PauseAudio(0);
+	_audioSuspended = false;
+	return 0;
+}
+
 #endif
diff --git a/backends/mixer/sdl/sdl-mixer.h b/backends/mixer/sdl/sdl-mixer.h
index e4e8263f38..f58260fef2 100644
--- a/backends/mixer/sdl/sdl-mixer.h
+++ b/backends/mixer/sdl/sdl-mixer.h
@@ -43,9 +43,14 @@ public:
 
 	Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
 
+	// Used by LinuxMoto Port
+	virtual void suspendAudio();
+	virtual int resumeAudio();
+
 protected:
 	Audio::MixerImpl *_mixer;
 	SDL_AudioSpec _obtainedRate;
+	bool _audioSuspended;
 
 	virtual SDL_AudioSpec getAudioSpec();
 	virtual void startAudio();
diff --git a/backends/platform/linuxmoto/linuxmoto-main.cpp b/backends/platform/linuxmoto/linuxmoto-main.cpp
index b971a65f7e..dfd1428d8b 100644
--- a/backends/platform/linuxmoto/linuxmoto-main.cpp
+++ b/backends/platform/linuxmoto/linuxmoto-main.cpp
@@ -26,19 +26,20 @@
 #include "common/scummsys.h"
 #include "common/system.h"
 
-#include <SDL/SDL.h>
-#include <SDL/SDL_syswm.h>
-
 #include "backends/platform/linuxmoto/linuxmoto-sdl.h"
 #include "base/main.h"
-#include "base/internal_version.h"
 
 int main(int argc, char *argv[]) {
+
+	// Create our OSystem instance
 	g_system = new OSystem_LINUXMOTO();
 	assert(g_system);
+
 	// Invoke the actual ScummVM main entry point:
 	int res = scummvm_main(argc, argv);
-	g_system->quit();	// TODO: Consider removing / replacing this!
+
+	// Free OSystem
+	delete (OSystem_LINUXMOTO *)g_system;
 
 	return res;
 }
diff --git a/backends/platform/linuxmoto/linuxmoto-sdl.cpp b/backends/platform/linuxmoto/linuxmoto-sdl.cpp
index ad1af455c3..696c339638 100644
--- a/backends/platform/linuxmoto/linuxmoto-sdl.cpp
+++ b/backends/platform/linuxmoto/linuxmoto-sdl.cpp
@@ -25,44 +25,17 @@
 
 #include "backends/platform/linuxmoto/linuxmoto-sdl.h"
 
-void OSystem_LINUXMOTO::preprocessEvents(SDL_Event *event) {
-	if (event->type == SDL_ACTIVEEVENT) {
-		if (event->active.state == SDL_APPINPUTFOCUS && !event->active.gain) {
-			suspendAudio();
-			for (;;) {
-				if (!SDL_WaitEvent(event)) {
-					SDL_Delay(10);
-					continue;
-				}
-				if (event->type == SDL_QUIT)
-					return;
-				if (event->type != SDL_ACTIVEEVENT)
-					continue;
-				if (event->active.state == SDL_APPINPUTFOCUS && event->active.gain) {
-					resumeAudio();
-						return;
-				}
-			}
-		}
-	}
-}
+#include "backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h"
+#include "backends/events/linuxmotosdl/linuxmotosdl-events.h"
 
-void OSystem_LINUXMOTO::suspendAudio() {
-	SDL_CloseAudio();
-	_audioSuspended = true;
-}
+void OSystem_LINUXMOTO::initBackend() {
+	// Create the backend custom managers
+	if (_eventsManager == 0)
+		_eventsManager = new LinuxmotoSdlEventManager();
 
-int OSystem_LINUXMOTO::resumeAudio() {
-	if (!_audioSuspended)
-		return -2;
-	if (SDL_OpenAudio(&_obtainedRate, NULL) < 0){
-		return -1;
-	}
-	SDL_PauseAudio(0);
-	_audioSuspended = false;
-	return 0;
-}
+	if (_graphicsManager == 0)
+		_graphicsManager = new LinuxmotoSdlGraphicsManager();
 
-void OSystem_LINUXMOTO::setupMixer() {
-	OSystem_SDL::setupMixer();
+	// Call parent implementation of this method
+	OSystem_POSIX::initBackend();
 }
diff --git a/backends/platform/linuxmoto/linuxmoto-sdl.h b/backends/platform/linuxmoto/linuxmoto-sdl.h
index c01d375603..78b9f81fd2 100644
--- a/backends/platform/linuxmoto/linuxmoto-sdl.h
+++ b/backends/platform/linuxmoto/linuxmoto-sdl.h
@@ -23,43 +23,17 @@
  *
  */
 
-#ifndef LINUXMOTO_SDL
-#define LINUXMOTO_SDL
+#ifndef PLATFORM_SDL_LINUXMOTO_H
+#define PLATFORM_SDL_LINUXMOTO_H
 
-#include "backends/platform/sdl/sdl.h"
+#include "backends/platform/sdl/posix/posix.h"
 
-// FIXME: For now keep hacks in this header to save polluting the SDL backend.
-enum {
-	GFX_HALF = 12
-};
-
-class OSystem_LINUXMOTO : public OSystem_SDL {
-private:
-	bool _audioSuspended;
+class OSystem_LINUXMOTO : public OSystem_POSIX {
 public:
-	/* Graphics */
-	void initSize(uint w, uint h);
-	void setGraphicsModeIntern();
-	bool setGraphicsMode(int mode);
-	void internUpdateScreen();
-	const OSystem::GraphicsMode *getSupportedGraphicsModes() const;
-	bool setGraphicsMode(const char *name);
-	int getDefaultGraphicsMode() const;
-	bool loadGFXMode();
-	void drawMouse();
-	void undrawMouse();
-	void showOverlay();
-	void hideOverlay();
+	virtual void initBackend();
 
-	/* Event Stuff */
-	virtual bool remapKey(SDL_Event &ev, Common::Event &event);
-	virtual void preprocessEvents(SDL_Event *event);
-	virtual void setupMixer();
+	// FIXME: This just calls parent methods, is it needed?
 	virtual Common::HardwareKeySet *getHardwareKeySet();
-	void fillMouseEvent(Common::Event&, int, int);
-	void suspendAudio();
-	int resumeAudio();
-	void warpMouse(int, int);
 };
 
 #endif
diff --git a/backends/platform/linuxmoto/module.mk b/backends/platform/linuxmoto/module.mk
index 8123d6e2ac..23f578b841 100644
--- a/backends/platform/linuxmoto/module.mk
+++ b/backends/platform/linuxmoto/module.mk
@@ -1,8 +1,6 @@
 MODULE := backends/platform/linuxmoto
 
 MODULE_OBJS := \
-	linuxmoto-events.o \
-	linuxmoto-graphics.o \
 	linuxmoto-main.o \
 	linuxmoto-sdl.o \
 	hardwarekeys.o
diff --git a/backends/platform/sdl/sdl.cpp b/backends/platform/sdl/sdl.cpp
index 574eeb5a9a..742f40511a 100644
--- a/backends/platform/sdl/sdl.cpp
+++ b/backends/platform/sdl/sdl.cpp
@@ -269,3 +269,8 @@ Audio::Mixer *OSystem_SDL::getMixer() {
 	assert(_mixerManager);
 	return _mixerManager->getMixer();
 }
+
+SdlMixerManager *OSystem_SDL::getMixerManager() {
+	assert(_mixerManager);
+	return _mixerManager;
+}
diff --git a/backends/platform/sdl/sdl.h b/backends/platform/sdl/sdl.h
index c61b8c810f..c238422906 100644
--- a/backends/platform/sdl/sdl.h
+++ b/backends/platform/sdl/sdl.h
@@ -71,6 +71,9 @@ public:
 	// Get the Graphics Manager instance, used by other managers
 	virtual SdlGraphicsManager *getGraphicsManager();
 
+	// Get the Sdl Mixer Manager instance (not the Audio::Mixer)
+	virtual SdlMixerManager *getMixerManager();
+
 protected:
 	bool _inited;
 	bool _initedSDL;