DS: Begin modularizing the DS backend

backends/mixer/maxmod/maxmod-mixer.cpp

@@ -36,7 +36,6 @@
 
 MaxModMixerManager::MaxModMixerManager(int freq, int bufSize)
 	:
-	_mixer(0),
 	_freq(freq),
 	_bufSize(bufSize) {
 
@@ -66,17 +65,30 @@ void MaxModMixerManager::init() {
 	sys.fifo_channel		= FIFO_MAXMOD;
 	mmInit( &sys );
 
-	mm_stream mystream;
-	mystream.sampling_rate = _freq;
-	mystream.buffer_length = _bufSize / 4;
-	mystream.callback = on_stream_request;
-	mystream.format = MM_STREAM_16BIT_STEREO;
-	mystream.timer = MM_TIMER2;
-	mystream.manual = 0;
+	_stream.sampling_rate = _freq;
+	_stream.buffer_length = _bufSize / 4;
+	_stream.callback = on_stream_request;
+	_stream.format = MM_STREAM_16BIT_STEREO;
+	_stream.timer = MM_TIMER2;
+	_stream.manual = 0;
 
-	mmStreamOpen( &mystream );
+	mmStreamOpen( &_stream );
 
 	_mixer->setReady(true);
 }
 
+void MaxModMixerManager::suspendAudio() {
+	mmStreamClose();
+	_audioSuspended = true;
+}
+
+int MaxModMixerManager::resumeAudio() {
+	if (!_audioSuspended)
+		return -2;
+
+	mmStreamOpen( &_stream );
+	_audioSuspended = false;
+	return 0;
+}
+
 #endif

backends/mixer/maxmod/maxmod-mixer.h

@@ -23,14 +23,16 @@
 #ifndef BACKENDS_MIXER_MAXMOD_H
 #define BACKENDS_MIXER_MAXMOD_H
 
-#include "audio/mixer_intern.h"
+#include "backends/mixer/mixer.h"
+
+#include <mm_types.h>
 
 /**
  * MaxMod mixer manager. It wraps the actual implementation
  * of the Audio:Mixer used by the engine, and sets up
  * MaxMod and the callback for the audio mixer implementation.
  */
-class MaxModMixerManager {
+class MaxModMixerManager : public MixerManager {
 public:
 	MaxModMixerManager(int freq, int bufSize);
 	virtual ~MaxModMixerManager();
@@ -41,14 +43,17 @@ public:
 	virtual void init();
 
 	/**
-	 * Get the audio mixer implementation
+	 * Pauses the audio system
 	 */
-	Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
+	virtual void suspendAudio();
+
+	/**
+	 * Resumes the audio system
+	 */
+	virtual int resumeAudio();
 
 protected:
-	/** The mixer implementation */
-	Audio::MixerImpl *_mixer;
-
+	mm_stream _stream;
 	int _freq, _bufSize;
 };
 

backends/platform/ds/osystem_ds.cpp

@@ -49,6 +49,8 @@
 
 #include "backends/audiocd/default/default-audiocd.h"
 #include "backends/events/default/default-events.h"
+#include "backends/mixer/maxmod/maxmod-mixer.h"
+#include "backends/mutex/null/null-mutex.h"
 #include "backends/saves/default/default-saves.h"
 #include "backends/timer/default/default-timer.h"
 
@@ -57,7 +59,7 @@
 OSystem_DS *OSystem_DS::_instance = NULL;
 
 OSystem_DS::OSystem_DS()
-	: _eventSource(NULL), _mixerManager(NULL), _isOverlayShown(true),
+	: _eventSource(NULL), _isOverlayShown(true),
 	_graphicsMode(GFX_HWSCALE), _stretchMode(100),
 	_disableCursorPalette(true), _graphicsEnable(true),
 	_callbackTimer(10), _currentTimeMillis(0)
@@ -66,11 +68,10 @@ OSystem_DS::OSystem_DS()
 
 	nitroFSInit(NULL);
 	_fsFactory = new DevoptabFilesystemFactory();
+	_mutexManager = new NullMutexManager();
 }
 
 OSystem_DS::~OSystem_DS() {
-	delete _mixerManager;
-	_mixerManager = 0;
 }
 
 void timerTickHandler() {
@@ -441,19 +442,6 @@ void OSystem_DS::getTimeAndDate(TimeDate &td) const {
 	td.tm_wday = t.tm_wday;
 }
 
-OSystem::MutexRef OSystem_DS::createMutex(void) {
-	return NULL;
-}
-
-void OSystem_DS::lockMutex(MutexRef mutex) {
-}
-
-void OSystem_DS::unlockMutex(MutexRef mutex) {
-}
-
-void OSystem_DS::deleteMutex(MutexRef mutex) {
-}
-
 void OSystem_DS::quit() {
 }
 

backends/platform/ds/osystem_ds.h

@@ -24,9 +24,9 @@
 #ifndef _OSYSTEM_DS_H_
 #define _OSYSTEM_DS_H_
 
-#include "backends/base-backend.h"
+#include "backends/modular-backend.h"
 #include "backends/events/ds/ds-events.h"
-#include "backends/mixer/maxmod/maxmod-mixer.h"
+#include "backends/mixer/mixer.h"
 #include "graphics/surface.h"
 #include "graphics/palette.h"
 
@@ -36,9 +36,8 @@ enum {
 	GFX_SWSCALE = 2
 };
 
-class OSystem_DS : public BaseBackend, public PaletteManager {
+class OSystem_DS : public ModularMutexBackend, public ModularMixerBackend, public PaletteManager {
 protected:
-	MaxModMixerManager *_mixerManager;
 	Graphics::Surface _framebuffer, _overlay, _cursor;
 	bool _graphicsEnable, _isOverlayShown;
 	int _graphicsMode, _stretchMode;
@@ -123,11 +122,6 @@ public:
 
 	virtual Common::String getSystemLanguage() const;
 
-	virtual MutexRef createMutex(void);
-	virtual void lockMutex(MutexRef mutex);
-	virtual void unlockMutex(MutexRef mutex);
-	virtual void deleteMutex(MutexRef mutex);
-
 	virtual void quit();
 
 	virtual void setFocusRectangle(const Common::Rect& rect);
@@ -141,8 +135,6 @@ public:
 	virtual Graphics::Surface *lockScreen();
 	virtual void unlockScreen();
 
-	virtual Audio::Mixer *getMixer() { return _mixerManager->getMixer(); }
-
 	virtual void setCursorPalette(const byte *colors, uint start, uint num);
 
 	void refreshCursor(u16 *dst, const Graphics::Surface &src, const uint16 *palette);