TITANIC: Added loadSound, support methods, and CSoundItem class

4 files changed, 116 insertions, 7 deletions

diff --git a/engines/titanic/sound/sound.cpp b/engines/titanic/sound/sound.cpp
index b3b783d4c6..68fb3aeeb6 100644
--- a/engines/titanic/sound/sound.cpp
+++ b/engines/titanic/sound/sound.cpp
@@ -64,4 +64,63 @@ void CSound::fn3(int val, int val2, int val3) {
 	warning("TODO: CSound::fn3");
 }
 
+uint CSound::loadSound(const CString &name) {
+	checkSounds();
+
+	// Check whether an entry for the given name is already active
+	for (CSoundItemList::iterator i = _sounds.begin(); i != _sounds.end(); ++i) {
+		CSoundItem *soundItem = *i;
+		if (soundItem->_name == name) {
+			// Found it, so move it to the front of the list and return
+			_sounds.remove(soundItem);
+			_sounds.push_front(soundItem);
+			return soundItem->_soundHandle;
+		}
+	}
+
+	// Create new sound item
+	CSoundItem *soundItem = new CSoundItem(name);
+	soundItem->_soundHandle = _soundManager.loadSound(name);
+
+	if (!soundItem->_soundHandle) {
+		// Could load sound, so destroy new item and return
+		delete soundItem;
+		return 0;
+	}
+
+	// Add the item to the list of sounds
+	_sounds.push_front(soundItem);
+
+	// If there are more than 10 sounds loaded, remove the last one,
+	// which is the least recently used of all of them
+	if (_sounds.size() > 10)
+		removeOldest();
+
+	return soundItem->_soundHandle;
+}
+
+void CSound::checkSounds() {
+	for (CSoundItemList::iterator i = _sounds.begin(); i != _sounds.end(); ++i) {
+		CSoundItem *soundItem = *i;
+		if (soundItem->_field24 && soundItem->_field28) {
+			if (_soundManager.isActive(soundItem->_soundHandle)) {
+				_sounds.remove(soundItem);
+				delete soundItem;
+			}
+		}
+	}
+}
+
+void CSound::removeOldest() {
+	for (CSoundItemList::iterator i = _sounds.reverse_begin();
+			i != _sounds.end(); --i) {
+		CSoundItem *soundItem = *i;
+		if (soundItem->_field28 && !_soundManager.isActive(soundItem->_soundHandle)) {
+			_sounds.remove(soundItem);
+			delete soundItem;
+			break;
+		}
+	}
+}
+
 } // End of namespace Titanic z
diff --git a/engines/titanic/sound/sound.h b/engines/titanic/sound/sound.h
index 488d4deb5e..19a8edfc21 100644
--- a/engines/titanic/sound/sound.h
+++ b/engines/titanic/sound/sound.h
@@ -25,15 +25,46 @@
 
 #include "titanic/support/simple_file.h"
 #include "titanic/sound/sound_manager.h"
+#include "titanic/core/list.h"
 #include "titanic/core/view_item.h"
 
 namespace Titanic {
 
 class CGameManager;
 
+class CSoundItem : public ListItem {
+public:
+	CString _name;
+	uint _soundHandle;
+	int _field1C;
+	int _field20;
+	int _field24;
+	int _field28;
+public:
+	CSoundItem() : ListItem(), _soundHandle(0), _field1C(0),
+		_field20(0), _field24(0), _field28(0) {}
+	CSoundItem(const CString &name) : ListItem(), _name(name), 
+		_soundHandle(0), _field1C(0), _field20(0), _field24(0), _field28(0) {}
+};
+
+class CSoundItemList : public List<CSoundItem> {
+};
+
 class CSound {
 private:
 	CGameManager *_gameManager;
+	CSoundItemList _sounds;
+private:
+	/**
+	 * Check whether any sounds are done and can be be removed
+	 */
+	void checkSounds();
+
+	/**
+	 * Removes the oldest sound from the sounds list that isn't
+	 * currently playing
+	 */
+	void removeOldest();
 public:
 	QSoundManager _soundManager;
 public:
@@ -74,6 +105,13 @@ public:
 	 */
 	void preEnterView(CViewItem *newView, bool isNewRoom);
 
+	/**
+	 * Load a sound
+	 * @param name		Name of sound resource
+	 * @returns			Sound handle Id
+	 */
+	uint loadSound(const CString &name);
+
 	bool fn1(int val);
 	void fn2(int val);
 	void fn3(int val, int val2, int val3);
diff --git a/engines/titanic/sound/sound_manager.cpp b/engines/titanic/sound/sound_manager.cpp
index 53e5a3dfe0..5c26527e09 100644
--- a/engines/titanic/sound/sound_manager.cpp
+++ b/engines/titanic/sound/sound_manager.cpp
@@ -34,7 +34,7 @@ QSoundManager::QSoundManager() : _field18(0), _field1C(0) {
 	Common::fill(&_field4A0[0], &_field4A0[16], 0);
 }
 
-int QSoundManager::proc3() {
+uint QSoundManager::loadSound(const CString &name) {
 	warning("TODO");
 	return 0;
 }
@@ -86,9 +86,9 @@ bool QSoundManager::proc14() {
 	return false;
 }
 
-int QSoundManager::proc15() {
+bool QSoundManager::isActive(uint handle) const {
 	warning("TODO");
-	return 0;
+	return false;
 }
 
 int QSoundManager::proc16() {
diff --git a/engines/titanic/sound/sound_manager.h b/engines/titanic/sound/sound_manager.h
index 68843dd1f2..84d9aeb5bd 100644
--- a/engines/titanic/sound/sound_manager.h
+++ b/engines/titanic/sound/sound_manager.h
@@ -37,7 +37,13 @@ protected:
 public:
 	SoundManager();
 	
-	virtual int proc3() const { return 0; }
+	/**
+	 * Loads a sound
+	 * @param name		Name of sound resource
+	 * @returns			Loaded sound handle
+	 */
+	virtual uint loadSound(const CString &name) { return 0; }
+
 	virtual int proc4() const { return 0; }
 	virtual int proc5() const { return 0; }
 	virtual void proc6() = 0;
@@ -49,7 +55,7 @@ public:
 	virtual void proc12() {}
 	virtual void proc13() {}
 	virtual bool proc14() = 0;
-	virtual int proc15() const { return 0; }
+	virtual bool isActive(uint handle) const { return false; }
 	virtual int proc16() const { return 0; }
 	virtual void WaveMixPump() {}
 	virtual int proc18() const { return 0; }
@@ -100,7 +106,13 @@ public:
 public:
 	QSoundManager();
 
-	virtual int proc3();
+	/**
+	 * Loads a sound
+	 * @param name		Name of sound resource
+	 * @returns			Loaded sound handle
+	 */
+	virtual uint loadSound(const CString &name);
+
 	virtual int proc4();
 	virtual int proc5();
 	virtual void proc6();
@@ -112,7 +124,7 @@ public:
 	virtual void proc12();
 	virtual void proc13();
 	virtual bool proc14();
-	virtual int proc15();
+	virtual bool isActive(uint handle) const;
 	virtual int proc16();
 	virtual void WaveMixPump();
 	virtual int proc18() const;