GOB: Play the music on the title screen of Gob1 EGA

The EGA version of Gobliiins comes with an MDY track.
While the original doesn't play it, we thought it might
be a nice idea to play it nevertheless.

1 files changed, 38 insertions, 15 deletions

diff --git a/engines/gob/sound/sound.cpp b/engines/gob/sound/sound.cpp
index f14e9b150a..9f72d1a98f 100644
--- a/engines/gob/sound/sound.cpp
+++ b/engines/gob/sound/sound.cpp
@@ -51,6 +51,8 @@ Sound::Sound(GobEngine *vm) : _vm(vm) {
 
 	_hasAdLib = (!_vm->_noMusic && _vm->hasAdLib());
 
+	_hasAdLibBg = _hasAdLib;
+
 	if (!_vm->_noMusic && (_vm->getPlatform() == Common::kPlatformAmiga)) {
 		_infogrames = new Infogrames(*_vm->_mixer);
 		_protracker = new Protracker(*_vm->_mixer);
@@ -274,8 +276,7 @@ bool Sound::adlibLoadMDY(const char *fileName) {
 	if (!_hasAdLib)
 		return false;
 
-	if (!_mdyPlayer)
-		_mdyPlayer = new MUSPlayer(*_vm->_mixer);
+	createMDYPlayer();
 
 	debugC(1, kDebugSound, "AdLib: Loading MDY data (\"%s\")", fileName);
 
@@ -296,8 +297,7 @@ bool Sound::adlibLoadTBR(const char *fileName) {
 	if (!_hasAdLib)
 		return false;
 
-	if (!_mdyPlayer)
-		_mdyPlayer = new MUSPlayer(*_vm->_mixer);
+	createMDYPlayer();
 
 	Common::SeekableReadStream *stream = _vm->_dataIO->getFile(fileName);
 	if (!stream) {
@@ -318,8 +318,7 @@ void Sound::adlibPlayTrack(const char *trackname) {
 	if (!_hasAdLib)
 		return;
 
-	if (!_adlPlayer)
-		_adlPlayer = new ADLPlayer(*_vm->_mixer);
+	createADLPlayer();
 
 	if (_adlPlayer->isPlaying())
 		return;
@@ -329,11 +328,10 @@ void Sound::adlibPlayTrack(const char *trackname) {
 }
 
 void Sound::adlibPlayBgMusic() {
-	if (!_hasAdLib)
+	if (!_hasAdLib || _hasAdLibBg)
 		return;
 
-	if (!_adlPlayer)
-		_adlPlayer = new ADLPlayer(*_vm->_mixer);
+	createADLPlayer();
 
 	static const char *const tracksMac[] = {
 //		"musmac1.adl", // This track seems to be missing instruments...
@@ -352,13 +350,18 @@ void Sound::adlibPlayBgMusic() {
 		"musmac5.mid"
 	};
 
-	if (_vm->getPlatform() == Common::kPlatformWindows) {
-		int track = _vm->_util->getRandom(ARRAYSIZE(tracksWin));
-		adlibPlayTrack(tracksWin[track]);
-	} else {
-		int track = _vm->_util->getRandom(ARRAYSIZE(tracksMac));
-		adlibPlayTrack(tracksMac[track]);
+	const char *track = 0;
+	if (_vm->getPlatform() == Common::kPlatformWindows)
+		track = tracksWin[ARRAYSIZE(tracksWin)];
+	else
+		track = tracksMac[_vm->_util->getRandom(ARRAYSIZE(tracksMac))];
+
+	if (!track || !_vm->_dataIO->hasFile(track)) {
+		_hasAdLibBg = false;
+		return;
 	}
+
+	adlibPlayTrack(track);
 }
 
 void Sound::adlibPlay() {
@@ -722,4 +725,24 @@ void Sound::bgUnshade() {
 	_bgatmos->unshade();
 }
 
+void Sound::createMDYPlayer() {
+	if (_mdyPlayer)
+		return;
+
+	delete _adlPlayer;
+	_adlPlayer = 0;
+
+	_mdyPlayer = new MUSPlayer(*_vm->_mixer);
+}
+
+void Sound::createADLPlayer() {
+	if (_adlPlayer)
+		return;
+
+	delete _mdyPlayer;
+	_mdyPlayer= 0;
+
+	_adlPlayer = new ADLPlayer(*_vm->_mixer);
+}
+
 } // End of namespace Gob