Implemented GPL2 commands for music.

Debugged everything.

svn-id: r45330

5 files changed, 44 insertions, 19 deletions

diff --git a/engines/draci/game.cpp b/engines/draci/game.cpp
index 773f97ce64..da94c261d3 100644
--- a/engines/draci/game.cpp
+++ b/engines/draci/game.cpp
@@ -1009,7 +1009,8 @@ void Game::loadRoom(int roomNum) {
 	roomReader.readUint16LE(); // Program length, not used
 	roomReader.readUint32LE(); // Pointer to room title, not used
 
-	_currentRoom._music = roomReader.readByte();
+	// Music will be played by the GPL2 command startMusic when needed.
+	setMusicTrack(roomReader.readByte());
 
 	int mapID = roomReader.readByte() - 1;
 	loadWalkingMap(mapID);
@@ -1044,7 +1045,7 @@ void Game::loadRoom(int roomNum) {
 	_currentRoom._escRoom = roomReader.readByte() - 1;
 	_currentRoom._numGates = roomReader.readByte();
 
-	debugC(4, kDraciLogicDebugLevel, "Music: %d", _currentRoom._music);
+	debugC(4, kDraciLogicDebugLevel, "Music: %d", getMusicTrack());
 	debugC(4, kDraciLogicDebugLevel, "Map: %d", mapID);
 	debugC(4, kDraciLogicDebugLevel, "Palette: %d", _currentRoom._palette);
 	debugC(4, kDraciLogicDebugLevel, "Overlays: %d", _currentRoom._numOverlays);
@@ -1123,12 +1124,6 @@ void Game::loadRoom(int roomNum) {
 
 	Animation *map = _vm->_anims->addAnimation(kWalkingMapOverlay, 255, false);
 	map->addFrame(ov, NULL);
-
-	if (_currentRoom._music) {
-		_vm->_music->playSMF(_currentRoom._music, true);
-	} else {
-		_vm->_music->stop();
-	}
 }
 
 int Game::loadAnimation(uint animNum, uint z) {
@@ -1430,6 +1425,14 @@ double Game::getPersStep() const {
 	return _currentRoom._persStep;
 }
 
+int Game::getMusicTrack() const {
+	return _currentRoom._music;
+}
+
+void Game::setMusicTrack(int num) {
+	_currentRoom._music = num;
+}
+
 int Game::getRoomNum() const {
 	return _currentRoom._roomNum;
 }
diff --git a/engines/draci/game.h b/engines/draci/game.h
index aa7ab27ae1..af0ed6d502 100644
--- a/engines/draci/game.h
+++ b/engines/draci/game.h
@@ -301,6 +301,8 @@ public:
 
 	double getPers0() const;
 	double getPersStep() const;
+	int getMusicTrack() const;
+	void setMusicTrack(int num);
 
 	int getItemStatus(int itemID) const;
 	void setItemStatus(int itemID, int status);
diff --git a/engines/draci/music.cpp b/engines/draci/music.cpp
index b13fac0673..ec6d85c66c 100644
--- a/engines/draci/music.cpp
+++ b/engines/draci/music.cpp
@@ -43,6 +43,10 @@ MusicPlayer::MusicPlayer(MidiDriver *driver, const char *pathMask) : _parser(0),
 	this->open();
 	_smfParser = MidiParser::createParser_SMF();
 	_midiMusicData = NULL;
+
+	// TODO: Load cmf.ins with the instrument table.  It seems that an
+	// interface for such an operation is supported for Adlib.  Maybe for
+	// this card, setting instruments is necessary.
 }
 
 MusicPlayer::~MusicPlayer() {
@@ -224,14 +228,12 @@ void MusicPlayer::syncVolume() {
 	int volume = ConfMan.getInt("music_volume");
 	debugC(2, kDraciSoundDebugLevel, "Syncing music volume to %d", volume);
 	setVolume(volume);
-}
 
-// TODO:
-// + volume support
-// - bindings to GPL2 scripting
-// - load cmf.ins
-// - enable Adlib
-// + resuming after configuration
-// + error handling
+	// TODO: doesn't work in the beginning when no music is playing yet.
+	// It goes through all active channels (= none) and stops.  Only after
+	// actual instruments have played in the channels, this has an effect.
+	// As a consequence, music is very loud in the beginning until Ctrl-F5
+	// is pressed for the first time.
+}
 
 } // End of namespace Draci
diff --git a/engines/draci/script.cpp b/engines/draci/script.cpp
index 5f4edf07b5..1809695d5b 100644
--- a/engines/draci/script.cpp
+++ b/engines/draci/script.cpp
@@ -73,9 +73,9 @@ void Script::setupCommandList() {
 		{ 16, 1, "RepaintInventory", 	0, { 0 }, NULL },	// not used in the original game files
 		{ 16, 2, "ExitInventory", 		0, { 0 }, NULL },	// not used in the original game files
 		{ 17, 1, "ExitMap", 			0, { 0 }, NULL },	// not used in the original game files
-		{ 18, 1, "LoadMusic", 			1, { 2 }, NULL },
-		{ 18, 2, "StartMusic", 			0, { 0 }, NULL },
-		{ 18, 3, "StopMusic", 			0, { 0 }, NULL },
+		{ 18, 1, "LoadMusic", 			1, { 2 }, &Script::loadMusic },
+		{ 18, 2, "StartMusic", 			0, { 0 }, &Script::startMusic },
+		{ 18, 3, "StopMusic", 			0, { 0 }, &Script::stopMusic },
 		{ 18, 4, "FadeOutMusic",		1, { 1 }, NULL },
 		{ 18, 5, "FadeInMusic", 		1, { 1 }, NULL },
 		{ 19, 1, "Mark", 				0, { 0 }, &Script::mark },
@@ -521,6 +521,21 @@ void Script::c_Let(Common::Queue<int> &params) {
 	_vm->_game->setVariable(var, value);
 }
 
+void Script::loadMusic(Common::Queue<int> &params) {
+	int track = params.pop();
+	_vm->_game->setMusicTrack(track);
+}
+
+void Script::startMusic(Common::Queue<int> &params) {
+	// If already playing this track, nothing happens.
+	_vm->_music->playSMF(_vm->_game->getMusicTrack(), true);
+}
+
+void Script::stopMusic(Common::Queue<int> &params) {
+	_vm->_music->stop();
+	_vm->_game->setMusicTrack(0);
+}
+
 void Script::mark(Common::Queue<int> &params) {
 	_vm->_game->setMarkedAnimationIndex(_vm->_anims->getLastIndex());
 }
diff --git a/engines/draci/script.h b/engines/draci/script.h
index eaede35ff4..3476dd1116 100644
--- a/engines/draci/script.h
+++ b/engines/draci/script.h
@@ -109,6 +109,9 @@ private:
 	void c_Let(Common::Queue<int> &params);
 	void load(Common::Queue<int> &params);
 	void start(Common::Queue<int> &params);
+	void loadMusic(Common::Queue<int> &params);
+	void startMusic(Common::Queue<int> &params);
+	void stopMusic(Common::Queue<int> &params);
 	void mark(Common::Queue<int> &params);
 	void release(Common::Queue<int> &params);
 	void icoStat(Common::Queue<int> &params);