Fixed occassional music crashes when loading games.

Thanks to eriktorbjorn for finding this issue.

svn-id: r7959

4 files changed, 12 insertions, 29 deletions

diff --git a/sound/midiparser.cpp b/sound/midiparser.cpp
index 233fc48adb..c02c699aa3 100644
--- a/sound/midiparser.cpp
+++ b/sound/midiparser.cpp
@@ -346,7 +346,7 @@ bool MidiParser::jumpToTick (uint32 tick, bool fireEvents) {
 		}
 	}
 
-	if (!_smartJump) {
+	if (!_smartJump || !currentPos._play_pos) {
 		allNotesOff();
 	} else {
 		EventInfo targetEvent (_next_event);
@@ -363,3 +363,11 @@ bool MidiParser::jumpToTick (uint32 tick, bool fireEvents) {
 	_abort_parse = true;
 	return true;
 }
+
+void MidiParser::unloadMusic() {
+	resetTracking();
+	allNotesOff();
+	_num_tracks = 0;
+	_active_track = 255;
+	_abort_parse = true;
+}
diff --git a/sound/midiparser.h b/sound/midiparser.h
index 4c31ecc73c..d12664da93 100644
--- a/sound/midiparser.h
+++ b/sound/midiparser.h
@@ -160,7 +160,7 @@ public:
 	virtual ~MidiParser() { allNotesOff(); }
 
 	virtual bool loadMusic (byte *data, uint32 size) = 0;
-	virtual void unloadMusic() = 0;
+	virtual void unloadMusic();
 	virtual void property (int prop, int value);
 
 	void setMidiDriver (MidiDriver *driver) { _driver = driver; }
diff --git a/sound/midiparser_smf.cpp b/sound/midiparser_smf.cpp
index b593c97b5c..77273976f9 100644
--- a/sound/midiparser_smf.cpp
+++ b/sound/midiparser_smf.cpp
@@ -34,7 +34,6 @@
 
 class MidiParser_SMF : public MidiParser {
 protected:
-	byte *_data;
 	byte *_buffer;
 	bool _malformedPitchBends;
 
@@ -43,11 +42,10 @@ protected:
 	void parseNextEvent (EventInfo &info);
 
 public:
-	MidiParser_SMF() : _data(0), _buffer(0), _malformedPitchBends(false) {}
+	MidiParser_SMF() : _buffer(0), _malformedPitchBends(false) {}
 	~MidiParser_SMF();
 
 	bool loadMusic (byte *data, uint32 size);
-	void unloadMusic();
 	void property (int property, int value);
 };
 
@@ -235,11 +233,8 @@ bool MidiParser_SMF::loadMusic (byte *data, uint32 size) {
 	if (midi_type == 1) {
 		_buffer = (byte *) calloc (size, 1);
 		compressToType0();
-		_data = _buffer;
 		_num_tracks = 1;
 		_tracks[0] = _buffer;
-	} else {
-		_data = data;
 	}
 
 	// Note that we assume the original data passed in
@@ -367,12 +362,4 @@ void MidiParser_SMF::compressToType0() {
 	*output++ = 0x00;
 }
 
-void MidiParser_SMF::unloadMusic() {
-	resetTracking();
-	allNotesOff();
-	_data = 0;
-	_num_tracks = 0;
-	_active_track = 255;
-}
-
 MidiParser *MidiParser::createParser_SMF() { return new MidiParser_SMF; }
diff --git a/sound/midiparser_xmidi.cpp b/sound/midiparser_xmidi.cpp
index edef6c7be4..0779137959 100644
--- a/sound/midiparser_xmidi.cpp
+++ b/sound/midiparser_xmidi.cpp
@@ -34,7 +34,6 @@
 
 class MidiParser_XMIDI : public MidiParser {
 protected:
-	byte *_data;
 	NoteTimer _notes_cache[32];
 	uint32 _inserted_delta; // Track simulated deltas for note-off events
 
@@ -44,11 +43,10 @@ protected:
 	void parseNextEvent (EventInfo &info);
 
 public:
-	MidiParser_XMIDI() : _data(0), _inserted_delta(0) {}
+	MidiParser_XMIDI() : _inserted_delta(0) {}
 	~MidiParser_XMIDI() { }
 
 	bool loadMusic (byte *data, uint32 size);
-	void unloadMusic();
 };
 
 
@@ -274,7 +272,6 @@ bool MidiParser_XMIDI::loadMusic (byte *data, uint32 size) {
 		// Note that we assume the original data passed in
 		// will persist beyond this call, i.e. we do NOT
 		// copy the data to our own buffer. Take warning....
-		_data = data;
 		_ppqn = 60;
 		resetTracking();
 		setTempo (500000);
@@ -286,15 +283,6 @@ bool MidiParser_XMIDI::loadMusic (byte *data, uint32 size) {
 	return false;
 }
 
-void MidiParser_XMIDI::unloadMusic() {
-	resetTracking();
-	allNotesOff();
-	_inserted_delta = 0;
-	_data = 0;
-	_num_tracks = 0;
-	_active_track = 255;
-}
-
 void MidiParser_XMIDI::resetTracking() {
 	MidiParser::resetTracking();
 	_inserted_delta = 0;