private static Receiver receiver;
private static MidiChannel[] channels;
private static MidiChannel activeChannel;
- private static MidiEvent[] timeSignatures, tempoChanges;
- private static ArrayList copyBuffer, emptyTracks;
+ private static ArrayList copyBuffer, emptyTracks, timeSignatures, tempoChanges;
private static Map trackMute = new HashMap();
private static Map trackSolo = new HashMap();
private static Thread player;
- private static String filename;
+ private static File file = null;
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;
* loads a sequence and creates the GUI.
*/
public static void main (String[] args) {
- System.out.println("\nMoosique version 1.0\n");
+ out("\nMoosique version 1.0\n");
// Parses command-line arguments.
String fileArg = null;
channels = synthesizer.getChannels();
setActiveChannel(0);
} catch (MidiUnavailableException e) {
- System.out.println("Failed, quitting.");
+ out("Failed, quitting.");
System.exit(1);
}
- System.out.println("Done");
+ out("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, creating new sequence");
+ if (!load(new File(fileArg))) {
+ out("Failed, creating new sequence");
clearSequence();
} else {
- System.out.println("Done");
+ out("Done");
}
} else {
// Otherwise creates a new empty one.
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {}
- gui = new MooGUI(seq);
- System.out.println("Done");
+ gui = new MooGUI(seq, file);
+ out("Done");
} else {
System.out.print("Playing...");
play();
while (sequencer.isRunning()) {}
- System.out.println("Done");
+ out("Done");
quit();
}
}
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
}
/**
- * Returns the tempo of the current sequence.
- * @return the tick position
+ * Returns the tempo in the given tick position.
+ * @param tick the tick position for which to return the tempo
+ * @return the tempo at the specified tick position
*/
- public static int getTempo() {
- return 120;
- // if (tempoMsg == null) return 0;
+ public static int getTempo(long tick) {
+ if (tempoChanges.size() == 0) return 120;
+ MidiEvent tempoEvent = (MidiEvent)tempoChanges.get(0);
+ if (tempoChanges.size() > 1) {
+ for (int i = 1; i < tempoChanges.size(); i++) {
+ MidiEvent nextTempoEvent = (MidiEvent)tempoChanges.get(i);
+ if (nextTempoEvent.getTick() < tick && nextTempoEvent.getTick() > tempoEvent.getTick())
+ tempoEvent = nextTempoEvent;
+ }
+ }
+ return decodeTempo(((MetaMessage)tempoEvent.getMessage()).getData());
}
/**
}
/**
- * Returns the tempo of the current sequence.
- * @return the tick position
+ * Returns the time signature in the given tick position.
+ * @param tick the tick position for which to return the time signature
+ * @return an array of two integers where [0] is the numerator and [1] the denominator
*/
- public static int[] getTimeSig() {
+ public static int[] getTimeSig(long tick) {
int[] ts = {4, 4};
- return ts;
- // if (timeSigMsg == null) return 0;
+ if (timeSignatures.size() == 0) return ts;
+ MidiEvent timeSigEvent = (MidiEvent)timeSignatures.get(0);
+ if (timeSignatures.size() > 1) {
+ for (int i = 1; i < timeSignatures.size(); i++) {
+ MidiEvent nextTimeSigEvent = (MidiEvent)timeSignatures.get(i);
+ if (nextTimeSigEvent.getTick() < tick && nextTimeSigEvent.getTick() > timeSigEvent.getTick())
+ timeSigEvent = nextTimeSigEvent;
+ }
+ }
+ return decodeTimeSig(((MetaMessage)timeSigEvent.getMessage()).getData());
}
/**
+ /* ***
+ ** ENCODING / DECODING METHODS **
+ *** */
+
+
+
+
+
+
+
+
+ /**
+ * Returns the byte array for the given tempo.
+ * @param tempo the tempo in beats per minute
+ * @return an array of bytes representing the given tempo
+ */
+ public static byte[] encodeTempo(int tempo) {
+ int microSecsPerQuarter = 60000000 / tempo;
+ byte[] b = new byte[3];
+ b[0] = (byte)(microSecsPerQuarter / 65536);
+ b[1] = (byte)((microSecsPerQuarter - (b[0] * 65536)) / 256);
+ b[2] = (byte)(microSecsPerQuarter - (b[0] * 65536) - (b[1] * 256));
+ return b;
+ }
+
+ /**
+ * Returns the tempo for the given byte array.
+ * @param an array of three bytes representing the tempo
+ * @return the tempo in beats per minute
+ */
+ public static int decodeTempo(byte[] bytes) {
+ return 60000000 / (bytes[0] * 65536 + bytes[1] * 256 + bytes[2]); // bytes[0] & 0xFF ???
+ }
+
+ /**
+ * Returns the byte array for the given time signature.
+ * @param numerator the numerator of the time signature
+ * @param denominator the denominator of the time signature
+ * @return an array of bytes representing the given time signature
+ */
+ public static byte[] encodeTimeSig(int numerator, int denominator) {
+ byte[] b = {
+ (byte)numerator,
+ (byte)(Math.log(denominator) / Math.log(2)),
+ (byte)96,
+ (byte)8
+ };
+ return b;
+ }
+ /**
+ * Returns the time signature for the given byte array.
+ * @param an array of four bytes representing the time signature
+ * @return an array of two integers where [0] is the numerator and [1] the denominator
+ */
+ public static int[] decodeTimeSig(byte[] bytes) {
+ int[] t = {
+ (int)bytes[0],
+ (int)(1 << bytes[1])
+ };
+ return t;
+ }
+
+
+
+
+
+
+
+
/* ***
** PLAYBACK METHODS **
*** */
* Replaces the current sequence with a new one, holding three empty tracks.
*/
public static void clearSequence() {
- // Creates a new sequence and sends it to the sequencer.
try {
+ // Creates a new sequence.
seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
- sequencer.setSequence(seq);
- filename = null;
+ Track[] tracks = seq.getTracks();
+
+ // Creates messages for default tempo (120) and time signature (4/4).
+ MetaMessage timeSigMsg = new MetaMessage();
+ MetaMessage tempoMsg = new MetaMessage();
+ try {
+ timeSigMsg.setMessage(88, encodeTimeSig(4, 4), 4);
+ tempoMsg.setMessage(81, encodeTempo(120), 3);
+ } catch (InvalidMidiDataException e) {}
+
+ // Adds them to track 0.
+ tracks[0].add(new MidiEvent(timeSigMsg, (long)0));
+ tracks[0].add(new MidiEvent(tempoMsg, (long)0));
+
+ // Sets program and title for the tracks.
+ initializeTrack(tracks[1], 0, 24, "Guitar");
+ initializeTrack(tracks[2], 1, 33, "Bass");
+ initializeTrack(tracks[3], 9, 0, "Drums");
+
+ file = null;
emptyTracks = new ArrayList();
+ timeSignatures = new ArrayList();
+ tempoChanges = new ArrayList();
trackSolo = new HashMap();
trackMute = new HashMap();
copyBuffer = new ArrayList();
} catch (InvalidMidiDataException e) {}
- // Sends sequence to GUI.
+ // Sends the sequence to the GUI.
if (gui != null) gui.setSequence(seq);
}
+
+ /**
+ * Creates event in the given track for program change and title.
+ */
+ private static void initializeTrack(Track track, int channel, int program, String title) {
+ // Creates program change and title message.
+ ShortMessage programMsg = new ShortMessage();
+ MetaMessage titleMsg = new MetaMessage();
+
+ // Sets the data of the messages.
+ try {
+ programMsg.setMessage(ShortMessage.PROGRAM_CHANGE, channel, program, 0);
+ titleMsg.setMessage(3, title.getBytes(), title.length());
+ } catch (InvalidMidiDataException e) {}
+
+ // Adds them to the track.
+ track.add(new MidiEvent(programMsg, (long)0));
+ track.add(new MidiEvent(titleMsg, (long)0));
+ }
/**
* Wraps each NoteOn event in the track with its NoteOff event in a MooNote.
* Loads a MIDI sequence from the given file.
* @param filename the filename to use
*/
- public static boolean load(String file) {
+ public static boolean load(File loadFile) {
// Loads sequence from file
- filename = file;
- try {seq = MidiSystem.getSequence(new File(filename));}
+ try {seq = MidiSystem.getSequence(loadFile);}
catch (Exception e) {return false;}
+ file = loadFile;
edited = false;
Track[] tracks = seq.getTracks();
emptyTracks = new ArrayList();
+ timeSignatures = new ArrayList();
+ tempoChanges = new ArrayList();
trackMute = new HashMap();
trackSolo = new HashMap();
copyBuffer = new ArrayList();
if (event.getMessage().getStatus() == MetaMessage.META) {
metaMsg = (MetaMessage)event.getMessage();
switch(metaMsg.getType()) {
- case 81: tc.add(event); break;
- case 88: ts.add(event);
+ case 81: tempoChanges.add(event); break;
+ case 88: timeSignatures.add(event);
}
}
}
- // timeSignatures = ts.toArray(timeSignatures);
- // tempoChanges = tc.toArray(tempoChanges);
// Converts tracks.
for (int i = 0; i < tracks.length; i++) {
* Saves the current sequence to the previously given filename.
*/
public static boolean save() {
- if (filename == null) return false;
+ if (file == null) return false;
else {
- saveAs(filename);
+ saveAs(file);
return true;
}
}
* Saves the current sequence to the given filename
* @param file the filename to use
*/
- public static boolean saveAs(String file) {
+ public static boolean saveAs(File saveFile) {
try {
- MidiSystem.write(seq, 1, new File(file));
- filename = file;
+ MidiSystem.write(seq, 1, saveFile);
+ file = saveFile;
edited = false;
- gui.setStatus("Saved " + file);
+ gui.setStatus("Saved " + file.getAbsolutePath());
return true;
} catch (IOException e) {
- gui.setStatus("Failed in saving " + file);
+ gui.setStatus("Failed in saving " + file.getAbsolutePath());
return false;
}
}
+ /**
+ * Prints the given string to the System output.
+ */
+ private static void out(String text) {
+ System.out.println(text);
+ }
+
/**
* Releases all reserved devices and exits the program.
*/
projects / moosique.git / commitdiff