TITANIC: Added loadSound, support methods, and CSoundItem class

1 files changed, 59 insertions, 0 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