T7G: start background music at start of input loop (0x0B). Should fix 2474078, but might break other things so I'm not going to backport it.

svn-id: r36125

3 files changed, 14 insertions, 4 deletions

diff --git a/engines/groovie/music.cpp b/engines/groovie/music.cpp
index 8c4d846b65..5812d0a9ba 100644
--- a/engines/groovie/music.cpp
+++ b/engines/groovie/music.cpp
@@ -33,7 +33,7 @@ namespace Groovie {
 
 MusicPlayer::MusicPlayer(GroovieEngine *vm, const Common::String &gtlName) :
 	_vm(vm), _midiParser(NULL), _data(NULL), _driver(NULL),
-	_backgroundFileRef(0), _gameVolume(100), _prevCDtrack(0) {
+	_backgroundFileRef(0), _gameVolume(100), _prevCDtrack(0), _isPlaying(0) {
 	// Create the parser
 	_midiParser = MidiParser::createParser_XMIDI();
 
@@ -174,12 +174,17 @@ void MusicPlayer::setGameVolume(uint16 volume, uint16 time) {
 		_fadingEndVolume = 100;
 }
 
+void MusicPlayer::startBackground() {
+	if (!_isPlaying && _backgroundFileRef) {
+		play(_backgroundFileRef, true);
+	}
+}
+
 void MusicPlayer::endTrack() {
 	debugC(1, kGroovieDebugMIDI | kGroovieDebugAll, "Groovie::Music: End of song");
 	unload();
-	if (_backgroundFileRef) {
-		play(_backgroundFileRef, true);
-	}
+	_isPlaying = false;
+	startBackground();
 }
 
 void MusicPlayer::applyFading() {
@@ -232,6 +237,7 @@ bool MusicPlayer::play(uint16 fileref, bool loop) {
 	_midiParser->property(MidiParser::mpAutoLoop, loop);
 	_gameVolume = 100;
 
+	_isPlaying = true;
 	// Load the new file
 	return load(fileref);
 }
diff --git a/engines/groovie/music.h b/engines/groovie/music.h
index 0883e7814b..3315ce1886 100644
--- a/engines/groovie/music.h
+++ b/engines/groovie/music.h
@@ -41,6 +41,7 @@ public:
 	void playSong(uint16 fileref);
 	void setBackgroundSong(uint16 fileref);
 	void playCD(uint8 track);
+	void startBackground();
 
 	// Volume
 	void setUserVolume(uint16 volume);
@@ -99,6 +100,7 @@ private:
 	MidiParser *_midiParser;
 	MidiDriver *_driver;
 	uint8 _musicType;
+	bool _isPlaying;
 
 	uint16 _backgroundFileRef;
 	uint8 _prevCDtrack;
diff --git a/engines/groovie/script.cpp b/engines/groovie/script.cpp
index 99698a6148..a8feda0805 100644
--- a/engines/groovie/script.cpp
+++ b/engines/groovie/script.cpp
@@ -582,6 +582,8 @@ void Script::o_inputloopstart() {
 	_mouseClicked = _eventMouseClicked;
 	_eventMouseClicked = false;
 
+	_vm->_musicPlayer->startBackground();
+
 	// Save the current pressed character for the whole loop
 	_kbdChar = _eventKbdChar;
 	_eventKbdChar = 0;