X-Git-Url: https://ruin.nu/git/?a=blobdiff_plain;f=Moosique.java;h=90ad9a0aeea4eb9f0bbba829fcdf928298abce83;hb=f7097bc07b6688d1629e6894c1c42dc06485dc12;hp=9b4349c9acbb9db040a1f8bd0d1b1c6d75225853;hpb=c87df9f217c5730ae465252b415bb7e52a4f3fed;p=moosique.git

diff --git a/Moosique.java b/Moosique.java
index 9b4349c..90ad9a0 100644
--- a/Moosique.java
+++ b/Moosique.java
@@ -17,52 +17,72 @@ public class Moosique {
 	private static Sequence seq;
 	private static Sequencer sequencer;
 	private static Synthesizer synthesizer;
+	private static Receiver receiver;
 	private static MidiChannel[] channels;
 	private static MidiChannel activeChannel;
 	private static MidiEvent[] timeSignatures, tempoChanges;
-	private static ArrayList emptyTracks;
 
-	private static String filename, fileArg;
-	private static long editPosition;
-	private static boolean makeGUI = true, isEdited = false, drawEmptyTracks = false;
+	private static ArrayList copyBuffer, emptyTracks;
+	private static Map trackMute = new HashMap();
+	private static Map trackSolo = new HashMap();
 	private static Thread player;
+
+	private static String filename;
+	private static long editPosition;
+	private static boolean makeGUI = true, initSound = true, edited = false, drawEmptyTracks = false;
 	public static final int DEFAULT_RESOLUTION = 96, DEFAULT_TRACKS = 4;
+	public static final int WHOLE_NOTE = 0, HALF_NOTE = 1, QUARTER_NOTE = 2, EIGHTH_NOTE = 3, SIXTEENTH_NOTE = 4;
 
 	/** 
 	 * Starts the application.
+	 * 
+	 * Parses command-line arguments, acquires MIDI devices and connects them,
+	 * loads a sequence and creates the GUI.
 	 */
 	public static void main (String[] args) {
 		System.out.println("\nMoosique version 1.0\n");
 
 		// Parses command-line arguments.
+		String fileArg = null;
 		for (int i = 0; i < args.length; i++) {
-			if (args[i].equals("-n")) {makeGUI = false;}
-			else if (fileArg == null) {fileArg = args[i];}
+			if (args[i].equals("-n")) makeGUI = false;
+			else if (args[i].equals("-m")) initSound = false;
+			else if (fileArg == null) fileArg = args[i];
 		}
 
 		// Acquires MIDI devices and connects them.
 		System.out.print("Initializing MIDI devices.");
 		try {
+			// Configures sequencer
 			sequencer = MidiSystem.getSequencer();
 			System.out.print(".");
 			sequencer.open();
+			sequencer.addMetaEventListener(new SongEndListener());
+
+			// Configures synthesizer
 			synthesizer = MidiSystem.getSynthesizer();
 			System.out.print(".");
 			synthesizer.open();
-			sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
+
+			// Configures receiver, transmitter and channels.
+			receiver = synthesizer.getReceiver();
+			sequencer.getTransmitter().setReceiver(receiver);
 			channels = synthesizer.getChannels();
 			setActiveChannel(0);
 		} catch (MidiUnavailableException e) {
 			System.out.println("Failed, quitting.");
-//			System.exit(1);
+			System.exit(1);
 		}
 		System.out.println("Done");
 
+		// Loads user preferences (work directory, last opened files etc).
+		loadPreferences();
+
 		//If a filename is given as the command-line argument, attempts to load a sequence from the file.
 		if (fileArg != null) {
 			System.out.print("Loading MIDI sequence from " + fileArg + "...");
 			if (!load(fileArg)) {
-				System.out.println("Failed");
+				System.out.println("Failed, creating new sequence");
 				clearSequence();
 			} else {
 				System.out.println("Done");
@@ -89,6 +109,64 @@ public class Moosique {
 		}
 	}
 
+
+
+
+
+
+
+
+	/*				***
+	 **	  ACCESSOR METHODS	 **
+	 ***				  */
+
+
+
+
+
+
+
+
+	/** 
+	 * Returns the currently active MidiChannel.
+	 * @return the active MidiChannel
+	 */
+	public static MidiChannel getActiveChannel() {
+		return activeChannel;
+	}
+
+	/** 
+	 * Returns the MidiChannels of the selected synthesizer.
+	 * @return the available MidiChannels
+	 */
+	public static MidiChannel getChannel(int i) {
+		return channels[i];
+	}
+
+	/** 
+	 * Returns the MidiChannels of the selected synthesizer.
+	 * @return the available MidiChannels
+	 */
+	public static MidiChannel[] getChannels() {
+		return channels;
+	}
+
+	/** 
+	 * Returns the current copy buffer.
+	 * @return the current copy buffer
+	 */
+	public static ArrayList getCopyBuffer() {
+		return copyBuffer;
+	}
+
+	/** 
+	 * Returns the current editing position of the sequencer.
+	 * @return the tick position
+	 */
+	public static long getEditPosition() {
+		return editPosition;
+	}
+
 	/** 
 	 * Returns the GUI.
 	 * @return the GUI
@@ -97,6 +175,30 @@ public class Moosique {
 		return gui;
 	}
 
+	/** 
+	 * Calculates the position (measures, beats, ticks) in the current sequence for the given tick position.
+	 * @return an array of integers where index 0 is measures, 1 is beats and 2 is ticks.
+	 */
+	public static int[] getPositionForTicks(long ticks) {
+		/*
+		int measures, beats, ticks;
+		for (int i = 0; i < timeSignatures.length; i++) {
+			long tick = timeSignatures[i].getTick();
+			// Split the ticks in the interval into measures, beats and ticks.
+		}
+		*/
+		int[] pos = {1, 1, 1};
+		return pos;
+	}
+
+	/** 
+	 * Returns the receiver of the current sequencer.
+	 * @return the receiver
+	 */
+	public static Receiver getReceiver() {
+		return receiver;
+	}
+
 	/** 
 	 * Returns the current sequence.
 	 * @return the current sequence
@@ -114,27 +216,88 @@ public class Moosique {
 	}
 
 	/** 
-	 * Returns the MidiChannels of the selected synthesizer.
-	 * @return the available MidiChannels
+	 * Returns the tempo of the current sequence.
+	 * @return the tick position
 	 */
-	public static MidiChannel[] getChannels() {
-		return channels;
+	public static int getTempo() {
+		return 120;
+		// if (tempoMsg == null) return 0;
 	}
 
 	/** 
-	 * Returns the MidiChannels of the selected synthesizer.
-	 * @return the available MidiChannels
+	 * Calculates the tick position in the current sequence for the given position (measures, beats, ticks).
+	 * @return the tick position.
 	 */
-	public static MidiChannel getChannel(int i) {
-		return channels[i];
+	public static long getTicksForPosition(int measures, int beats, int ticks) {
+		long tickPos = 0;
+		/*
+		for (int i = 0; i < timeSignatures.length; i++) {
+			long tick = timeSignatures[i].getTick();
+			// Add the measures, beats and ticks in the interval.
+		}
+		*/
+		return tickPos;
 	}
 
 	/** 
-	 * Returns the currently active MidiChannel.
-	 * @return the active MidiChannel
+	 * Returns the tempo of the current sequence.
+	 * @return the tick position
 	 */
-	public static MidiChannel getActiveChannel() {
-		return activeChannel;
+	public static int[] getTimeSig() {
+		int[] ts = {4, 4};
+		return ts;
+		// if (timeSigMsg == null) return 0;
+	}
+
+	/** 
+	 * Returns true if the current sequence has been edited.
+	 * @return the tick position
+	 */
+	public static boolean isEdited() {
+		return edited;
+	}
+
+	/** 
+	 * Returns whether the given track should be drawn
+	 * @return true if the given track should be drawn
+	 */
+	public static boolean shouldBeDrawn(Track track) {
+		if (drawEmptyTracks) return true;
+		else return (!emptyTracks.contains(track));
+	}
+
+
+
+
+
+
+
+
+	/*				***
+	 **	  MUTATOR METHODS	 **
+	 ***				  */
+
+
+
+
+
+
+
+
+	/** 
+	 * Fast forwards the current sequence the given number of measures.
+	 * @param measures	the number of measures to fast forward
+	 */
+	public static void forward(long ticks) {
+		editPosition += ticks;
+	}
+
+	/** 
+	 * Rewinds the current sequence the given number of measures.
+	 * @param measures	the number of measures to rewind
+	 */
+	public static void rewind(long ticks) {
+		editPosition -= ticks;
 	}
 
 	/** 
@@ -146,35 +309,102 @@ public class Moosique {
 	}
 
 	/** 
-	 * Replaces the current sequence with a new one, holding three empty tracks.
+	 * Sets the current copy buffer.
+	 * @param the copy buffer
 	 */
-	public static void clearSequence() {
-		// Creates a new sequence and sends it to the sequencer.
-		try {
-			seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
-			sequencer.setSequence(seq);
-			emptyTracks = new ArrayList();
-		} catch (InvalidMidiDataException e) {}
-		// Sends sequence to GUI.
-		if (gui != null) gui.setSequence(seq);
+	public static void setCopyBuffer(ArrayList buffer) {
+		copyBuffer = buffer;
 	}
 
 	/** 
-	 * Starts playback of the current sequence.
+	 * Sets whether empty tracks should be drawn
+	 * @param state		true if empty tracks should be drawn
 	 */
-	public static void play() {
-		sequencer.setTickPosition(editPosition);
-		resume();
+	public static void setDrawEmptyTracks(boolean state) {
+		drawEmptyTracks = state;
 	}
 
 	/** 
-	 * Pauses playback of the current sequence.
+	 * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 	 */
-	public static void pause() {
-		if (sequencer.isRunning()) {
-			sequencer.stop();
+	public static void setEdited() {
+		edited = true;
+	}
+
+	/** 
+	 * Sets the current editing position of the sequencer.
+	 * @param ticks		the tick position
+	 */
+	public static void setEditPosition(long ticks) {
+		editPosition = ticks;
+	}
+
+	/** 
+	 * Sets the current editing position of the sequencer.
+	 * @param ticks		the tick position
+	 */
+	public static void setTempo(int bpm) {
+		// tempoMsg
+	}
+
+	/** 
+	 * Sets the current editing position of the sequencer.
+	 * @param ticks		the tick position
+	 */
+	public static void setTimeSig(int bpm) {
+		// timeSigMsg
+	}
+	
+	/** 
+	 * Sets the solo setting of the given track.
+	 * @param on	true for solo, false for not
+	 */
+	public static void setTrackSolo(Track track, boolean on){
+		trackSolo.put(track, new Boolean(on));	
+	}
+
+	/** 
+	 * Sets the mute setting of the given track.
+	 * @param on	true for mute, false for not
+	 */
+	public static void setTrackMute(Track track, boolean on){
+		trackMute.put(track, new Boolean(on));	
+	}
+
+	/** 
+	 * Sets the current playback volume.
+	 * @param volume	the volume, between 0 and 1
+	 */
+	public void setVolume(long volume) {
+		for (int i = 0; i < channels.length; i++) {
+			channels[i].controlChange(7, (int)(volume * 127.0));
 		}
-		if (player != null) player.interrupt();
+	}
+
+
+
+
+
+
+
+
+	/*				***
+	 **	  PLAYBACK METHODS	 **
+	 ***				  */
+
+
+
+
+
+
+
+
+	/** 
+	 * Starts playback of the current sequence.
+	 */
+	public static void play() {
+		sequencer.setTickPosition(editPosition);
+		resume();
 	}
 
 	/** 
@@ -185,23 +415,31 @@ public class Moosique {
 		try {
 			sequencer.setSequence(seq);
 		} catch (InvalidMidiDataException e) {}
+		Track[] tracks = seq.getTracks();
+
 		sequencer.start();
 
+		for (int i = 0; i < tracks.length; i++) {
+
+			Object ob = trackSolo.get(tracks[i]);
+			if(ob instanceof Boolean){
+				sequencer.setTrackSolo(i,((Boolean)ob).booleanValue());
+			}
+
+			ob = trackMute.get(tracks[i]);
+			if(ob instanceof Boolean){
+				sequencer.setTrackMute(i,((Boolean)ob).booleanValue());
+			}
+		}
+
+
 		// Disables input to volatile components
 		// gui.disable();
 
 		// Creates the visualisation thread and starts it.
 		player = new Thread () {
 			public void run() {
-				long ticksPerSixteenth = seq.getResolution()/4;
-				System.out.println("Ticks/16: " + ticksPerSixteenth);
-				long position = sequencer.getTickPosition();
 				while(sequencer.isRunning()) {
-					long pos = sequencer.getTickPosition();
-					long tickDiff = pos - position;
-					System.out.print(" ... " + tickDiff);
-					position = pos;
-
 					// Updates the GUI with the current tick position.
 					gui.update(sequencer.getTickPosition());
 
@@ -220,6 +458,16 @@ public class Moosique {
 		player.start();
 	}
 
+	/** 
+	 * Pauses playback of the current sequence.
+	 */
+	public static void pause() {
+		if (sequencer.isRunning()) {
+			sequencer.stop();
+		}
+		if (player != null) player.interrupt();
+	}
+
 	/** 
 	 * Stops playback of the current sequence.
 	 */
@@ -232,124 +480,123 @@ public class Moosique {
 		gui.update((long)0);
 	}
 
-	/** 
-	 * Returns the current editing position of the sequencer.
-	 * @return the tick position
-	 */
-	public static long getEditPosition() {
-		return editPosition;
-	}
 
-	/** 
-	 * Sets the current editing position of the sequencer.
-	 * @param ticks		the tick position
-	 */
-	public static void setEditPosition(long ticks) {
-		editPosition = ticks;
-	}
 
-	/** 
-	 * Returns the tempo of the current sequence.
-	 * @return the tick position
-	 */
-	public static int getTempo() {
-		return 120;
-		// if (tempoMsg == null) return 0;
-	}
 
-	/** 
-	 * Sets the current editing position of the sequencer.
-	 * @param ticks		the tick position
-	 */
-	public static void setTempo(int bpm) {
-		// tempoMsg
-	}
 
-	/** 
-	 * Returns the tempo of the current sequence.
-	 * @return the tick position
-	 */
-	public static int[] getTimeSig() {
-		int[] ts = {4, 4};
-		return ts;
-		// if (timeSigMsg == null) return 0;
-	}
 
-	/** 
-	 * Sets the current editing position of the sequencer.
-	 * @param ticks		the tick position
-	 */
-	public static void setTimeSig(int bpm) {
-		// timeSigMsg
-	}
 
-	/** 
-	 * Returns true if the current sequence has been edited.
-	 * @return the tick position
-	 */
-	public static boolean isEdited() {
-		return isEdited;
-	}
 
-	/** 
-	 * Sets the current sequence as edited, which implies prompts when loading a new sequence.
-	 */
-	public static void setEdited() {
-		isEdited = true;
-	}
+	/*				***
+	 **	  SYSTEM & IO METHODS	 **
+	 ***				  */
+
+
+
+
+
 
-	/** 
-	 * Rewinds the current sequence the given number of measures.
-	 * @param measures	the number of measures to rewind
-	 */
-	public static void rewind(long ticks) {
-		editPosition -= ticks;
-	}
 
-	/** 
-	 * Fast forwards the current sequence the given number of measures.
-	 * @param measures	the number of measures to fast forward
-	 */
-	public static void forward(long ticks) {
-		editPosition += ticks;
-	}
 
 	/** 
-	 * Returns whether the given track should be drawn
-	 * @return true if the given track should be drawn
+	 * Replaces the current sequence with a new one, holding three empty tracks.
 	 */
-	public static boolean shouldBeDrawn(Track track) {
-		if (drawEmptyTracks) return true;
-		else return (!emptyTracks.contains(track));
+	public static void clearSequence() {
+		// Creates a new sequence and sends it to the sequencer.
+		try {
+			seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
+			sequencer.setSequence(seq);
+			filename = null;
+			emptyTracks = new ArrayList();
+			trackSolo = new HashMap();
+			trackMute = new HashMap();
+			copyBuffer = new ArrayList();
+		} catch (InvalidMidiDataException e) {}
+		// Sends sequence to GUI.
+		if (gui != null) gui.setSequence(seq);
 	}
-
-
+	
 	/** 
-	 * Sets whether empty tracks should be drawn
-	 * @param state		true if empty tracks should be drawn
+	 * Wraps each NoteOn event in the track with its NoteOff event in a MooNote.
+	 * @param track		the track to convert
+	 * @param quantize	whether to round locations and durations in the track to nearest 16th
+	 * @return a list of the created MooNotes
 	 */
-	public static void setDrawEmptyTracks(boolean state) {
-		drawEmptyTracks = state;
+	public static List convertTrack(Track track, boolean quantize) {
+		// Searches the track for NoteOn and NoteOff events
+		ArrayList noteOns = new ArrayList(track.size() / 2);
+		ArrayList noteOffs = new ArrayList(track.size() / 2);
+		ArrayList newMooNotes = new ArrayList();
+		MidiEvent event;
+		for (int j = 0; j < track.size(); j++) {
+			event = track.get(j);
+			if (event.getMessage().getStatus() >= 144 &&
+			    event.getMessage().getStatus() < 160) noteOns.add(event);
+			if (event.getMessage().getStatus() >= 128 &&
+			    event.getMessage().getStatus() < 144) noteOffs.add(event);
+		}
+		noteOns.trimToSize();
+		noteOffs.trimToSize();
+		if (noteOns.size() == 0) emptyTracks.add(track);
+		
+		// Sorts the note lists by tick position.
+		Comparator c = new MidiEventComparator();
+		Collections.sort(noteOns, c);
+		Collections.sort(noteOffs, c);
+
+		// Replaces each NoteOn event it with a MooNote containing a reference to the NoteOff event.
+		Iterator iOn = noteOns.iterator(), iOff;
+		MidiEvent on, off = null, nextOff;
+		ShortMessage onMsg, nextOffMsg;
+		while(iOn.hasNext()) {
+			on = (MidiEvent)iOn.next();
+		    	if (!(on instanceof MooNote)) {
+				onMsg = (ShortMessage)on.getMessage();
+				iOff = noteOffs.iterator();
+				while(iOff.hasNext()) {
+					nextOff = (MidiEvent)iOff.next();
+					nextOffMsg = (ShortMessage)nextOff.getMessage();
+					if(onMsg.getChannel() == nextOffMsg.getChannel() &&
+					   onMsg.getData1() == nextOffMsg.getData1() &&
+					   c.compare(nextOff, on) > 0) {
+						off = nextOff;
+						iOff.remove();
+						break;
+					}
+					   	
+				}
+				track.remove(on);
+				MooNote mn;
+				if (off != null) {
+					mn = new MooNote(on, off);
+				} else {
+					mn = new MooNote(on, new MidiEvent((ShortMessage)on.getMessage().clone(), on.getTick() + 48));
+				}
+				track.add(mn);
+				newMooNotes.add(mn);
+				iOn.remove();
+			}
+		}
+		if (quantize) quantize(newMooNotes, SIXTEENTH_NOTE, true, true);
+		return newMooNotes;
 	}
 
 	/** 
-	 * Loads the MooSequence in the given file.
+	 * Loads a MIDI sequence from the given file.
 	 * @param filename	the filename to use
 	 */
 	public static boolean load(String file) {
 		// Loads sequence from file
 		filename = file;
-		try {
-			seq = MidiSystem.getSequence(new File(filename));
-		} catch (InvalidMidiDataException e) {
-			return false;
-		} catch (IOException e) {
-			return false;
-		}
-		isEdited = false;
+		try {seq = MidiSystem.getSequence(new File(filename));}
+		catch (Exception e) {return false;}
+		edited = false;
 
 		Track[] tracks = seq.getTracks();
 		emptyTracks = new ArrayList();
+		trackMute = new HashMap();
+		trackSolo = new HashMap();
+		copyBuffer = new ArrayList();
 
 		// Searches track 0 for changes in tempo and time signature.
 		MidiEvent event;
@@ -365,64 +612,14 @@ public class Moosique {
 				}
 			}
 		}
-//		timeSignatures = ts.toArray(timeSignatures);
-//		tempoChanges = tc.toArray(tempoChanges);
+		// timeSignatures = ts.toArray(timeSignatures);
+		// tempoChanges = tc.toArray(tempoChanges);
 
-		// Wraps each NoteOn event with its NoteOff event in a MooNote
-		ArrayList noteOns, noteOffs;
+		// Converts tracks.
 		for (int i = 0; i < tracks.length; i++) {
-			// Searches the sequence for NoteOn and NoteOff events
-			noteOns = new ArrayList(tracks[i].size() / 2);
-			noteOffs = new ArrayList(tracks[i].size() / 2);
-			for (int j = 0; j < tracks[i].size(); j++) {
-				event = tracks[i].get(j);
-				if (event.getMessage().getStatus() >= 144 &&
-				    event.getMessage().getStatus() < 160) noteOns.add(event);
-				if (event.getMessage().getStatus() >= 128 &&
-				    event.getMessage().getStatus() < 144) noteOffs.add(event);
-			}
-			noteOns.trimToSize();
-			noteOffs.trimToSize();
-			if (noteOns.size() == 0) emptyTracks.add(tracks[i]);
-			
-			// Sorts the note lists by tick position.
-			Comparator c = new Comparator() {
-				public int compare(Object o1, Object o2) {
-					return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
-				}
-			};
-			Collections.sort(noteOns, c);
-			Collections.sort(noteOffs, c);
-
-			// Replaces each NoteOn event it with a MooNote containing a reference to the NoteOff event.
-			Iterator iOn = noteOns.iterator(), iOff;
-			MidiEvent on, off = null, nextOff;
-			ShortMessage onMsg, nextOffMsg;
-			while(iOn.hasNext()) {
-				on = (MidiEvent)iOn.next();
-				onMsg = (ShortMessage)on.getMessage();
-				iOff = noteOffs.iterator();
-				while(iOff.hasNext()) {
-					nextOff = (MidiEvent)iOff.next();
-					nextOffMsg = (ShortMessage)nextOff.getMessage();
-					if(onMsg.getChannel() == nextOffMsg.getChannel() &&
-					   onMsg.getData1() == nextOffMsg.getData1() &&
-					   c.compare(nextOff, on) > 0) {
-						off = nextOff;
-						iOff.remove();
-						break;
-					}
-					   	
-				}
-				tracks[i].remove(on);
-				if (off != null) {
-					tracks[i].add(new MooNote(on, off));
-				} else {
-					tracks[i].add(new MooNote(on));
-				}
-				iOn.remove();
-			}
+			convertTrack(tracks[i], false);
 		}
+
 		// Sends sequence to GUI and sequencer, then returns
 		if (gui != null) gui.setSequence(seq);
 		try {
@@ -432,30 +629,100 @@ public class Moosique {
 	}
 
 	/** 
-	 * Saves the current sequence to the given filename
-	 * @param file	the filename to use
+	 * Quantizes the given list of MIDI events
+	 * @param notes		a list of the notes to quantize
+	 * @param resolution	the note size to round each note to
+	 * @param location	whether the quantize should affect the location of the note
+	 * @param duration	whether the quantize should affect the duration of the note
 	 */
-	public static void saveAs(String file) {
-		try {
-			MidiSystem.write(seq, 1, new File(filename));
-		} catch (IOException e) {}
-		filename = file;
-		gui.setStatus("Saved " + file);
+	public static void quantize(List notes, int resolution, boolean location, boolean duration) {
+		// Math.round(mn.getTick() / ticksPerSixteenth);
+	}
+
+	/** 
+	 * Loads the user preferences.
+	 */
+	public static void loadPreferences() {
+		
+	}
+
+	/** 
+	 * Saves the user preferences.
+	 */
+	public static void savePreferences() {
+		
+	}
+
+	/** 
+	 * Prompts the user .
+	 */
+	public static boolean promptOnUnsavedChanges() {
+		if (!edited) return false;
+		int exitOption = JOptionPane.showConfirmDialog(gui,
+			"The current sequence has been edited, but not saved.\nDo you wish to continue anyway?",
+			"File not saved - continue?", 
+			JOptionPane.OK_CANCEL_OPTION, 
+			JOptionPane.WARNING_MESSAGE);
+		if (exitOption == JOptionPane.CANCEL_OPTION || exitOption == JOptionPane.CLOSED_OPTION) return true;
+		return false;
 	}
 
 	/** 
 	 * Saves the current sequence to the previously given filename.
 	 */
-	public static void save() {
-		saveAs(filename);
+	public static boolean save() {
+		if (filename == null) return false;
+		else {
+			saveAs(filename);
+			return true;
+		}
+	}
+
+	/** 
+	 * Saves the current sequence to the given filename
+	 * @param file	the filename to use
+	 */
+	public static boolean saveAs(String file) {
+		try {
+			MidiSystem.write(seq, 1, new File(file));
+			filename = file;
+			edited = false;
+			gui.setStatus("Saved " + file);
+			return true;
+		} catch (IOException e) {
+			gui.setStatus("Failed in saving " + file);
+			return false;
+		}
 	}
 
 	/** 
 	 * Releases all reserved devices and exits the program.
 	 */
 	public static void quit() {
+		if (gui != null) {
+			if (promptOnUnsavedChanges()) return;
+		}
+		savePreferences();
 		if (sequencer.isOpen()) sequencer.close();
 		if (synthesizer.isOpen()) synthesizer.close();
 		System.exit(0);
 	}
-}
\ No newline at end of file
+	
+	/** 
+	 * A Ccmparator for sorting lists of MidiEvents.
+	 */
+	public static class MidiEventComparator implements Comparator {
+		public int compare(Object o1, Object o2) {
+			return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
+		}
+	}
+
+	/** 
+	 * A listener for detecting the end of the sequence.
+	 */
+	public static void class SongEndListener implements MetaEventListener {
+		public void meta(MetaMessage event) {
+			if (event.getType() == 47 ) sequencer.stop(); // End of stream
+		}
+	}
+}