Moosique.java

   1 import javax.sound.midi.*;
   2 import java.io.*;
   3 import javax.swing.*;
   4 import java.util.*;
   5
   6 /**
   7  * Moosique - The MIDI Tracker
   8  *
   9  * Main class that handles initiation, IO and sound.
  10  *
  11  * @author  Einar Pehrson
  12  */
  13
  14 public class Moosique {
  15
  16         private static MooGUI gui;
  17         private static Sequence seq;
  18         private static Sequencer sequencer;
  19         private static Synthesizer synthesizer;
  20         private static MidiChannel[] channels;
  21         private static MidiChannel activeChannel;
  22         private static MidiEvent[] timeSignatures, tempoChanges;
  23         private static ArrayList emptyTracks;
  24
  25         private static String filename, fileArg;
  26         private static long editPosition;
  27         private static boolean makeGUI = true, isEdited = false, drawEmptyTracks = false;
  28         private static Thread player;
  29         public static final int DEFAULT_RESOLUTION = 96, DEFAULT_TRACKS = 4;
  30
  31         /**
  32          * Starts the application.
  33          */
  34         public static void main (String[] args) {
  35                 System.out.println("\nMoosique version 1.0\n");
  36
  37                 // Parses command-line arguments.
  38                 for (int i = 0; i < args.length; i++) {
  39                         if (args[i].equals("-n")) {makeGUI = false;}
  40                         else if (fileArg == null) {fileArg = args[i];}
  41                 }
  42
  43                 // Acquires MIDI devices and connects them.
  44                 System.out.print("Initializing MIDI devices.");
  45                 try {
  46                         sequencer = MidiSystem.getSequencer();
  47                         System.out.print(".");
  48                         sequencer.open();
  49                         synthesizer = MidiSystem.getSynthesizer();
  50                         System.out.print(".");
  51                         synthesizer.open();
  52                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  53                         channels = synthesizer.getChannels();
  54                         setActiveChannel(0);
  55                 } catch (MidiUnavailableException e) {
  56                         System.out.println("Failed, quitting.");
  57 //                      System.exit(1);
  58                 }
  59                 System.out.println("Done");
  60
  61                 //If a filename is given as the command-line argument, attempts to load a sequence from the file.
  62                 if (fileArg != null) {
  63                         System.out.print("Loading MIDI sequence from " + fileArg + "...");
  64                         if (!load(fileArg)) {
  65                                 System.out.println("Failed");
  66                                 clearSequence();
  67                         } else {
  68                                 System.out.println("Done");
  69                         }
  70                 } else {
  71                         // Otherwise creates a new empty one.
  72                         clearSequence();
  73                 }
  74
  75                 // Builds GUI, unless n-flag is set.
  76                 if (makeGUI) {
  77                         System.out.print("Building GUI...");
  78                         try {
  79                                 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  80                         } catch (Exception e) {}
  81                         gui = new MooGUI(seq);
  82                         System.out.println("Done");
  83                 } else {
  84                         System.out.print("Playing...");
  85                         play();
  86                         while (sequencer.isRunning()) {}
  87                         System.out.println("Done");
  88                         quit();
  89                 }
  90         }
  91
  92         /**
  93          * Returns the GUI.
  94          * @return the GUI
  95          */
  96         public static MooGUI getGUI() {
  97                 return gui;
  98         }
  99
 100         /**
 101          * Returns the current sequence.
 102          * @return the current sequence
 103          */
 104         public static Sequence getSequence() {
 105                 return seq;
 106         }
 107
 108         /**
 109          * Returns the current sequencer.
 110          * @return the current sequencer
 111          */
 112         public static Sequencer getSequencer() {
 113                 return sequencer;
 114         }
 115
 116         /**
 117          * Returns the MidiChannels of the selected synthesizer.
 118          * @return the available MidiChannels
 119          */
 120         public static MidiChannel[] getChannels() {
 121                 return channels;
 122         }
 123
 124         /**
 125          * Returns the MidiChannels of the selected synthesizer.
 126          * @return the available MidiChannels
 127          */
 128         public static MidiChannel getChannel(int i) {
 129                 return channels[i];
 130         }
 131
 132         /**
 133          * Returns the currently active MidiChannel.
 134          * @return the active MidiChannel
 135          */
 136         public static MidiChannel getActiveChannel() {
 137                 return activeChannel;
 138         }
 139
 140         /**
 141          * Sets the currently active MidiChannel.
 142          * @param channel       the number of the MidiChannel to activate
 143          */
 144         public static void setActiveChannel(int channel) {
 145                 activeChannel = channels[channel];
 146         }
 147
 148         /**
 149          * Replaces the current sequence with a new one, holding three empty tracks.
 150          */
 151         public static void clearSequence() {
 152                 // Creates a new sequence and sends it to the sequencer.
 153                 try {
 154                         seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
 155                         sequencer.setSequence(seq);
 156                 } catch (InvalidMidiDataException e) {}
 157                 // Sends sequence to GUI.
 158                 if (gui != null) gui.setSequence(seq);
 159         }
 160
 161         /**
 162          * Starts playback of the current sequence.
 163          */
 164         public static void play() {
 165                 sequencer.setTickPosition(editPosition);
 166                 resume();
 167         }
 168
 169         /**
 170          * Pauses playback of the current sequence.
 171          */
 172         public static void pause() {
 173                 if (sequencer.isRunning()) {
 174                         sequencer.stop();
 175                 }
 176                 if (player != null) player.interrupt();
 177         }
 178
 179         /**
 180          * Resumes playback of the current sequence.
 181          */
 182         public static void resume() {
 183                 gui.update(0);
 184                 sequencer.start();
 185
 186                 // Disables input to volatile components
 187                 // gui.disable();
 188
 189                 // Creates the visualisation thread and starts it.
 190                 player = new Thread () {
 191                         public void run() {
 192                                 long ticksPerSixteenth = seq.getResolution()/4;
 193                                 System.out.println("Ticks/16: " + ticksPerSixteenth);
 194                                 long position = sequencer.getTickPosition();
 195                                 while(sequencer.isRunning()) {
 196                                         long pos = sequencer.getTickPosition();
 197                                         long tickDiff = pos - position;
 198                                         System.out.print(" ... " + tickDiff);
 199                                         position = pos;
 200
 201                                         // Updates the GUI with the current tick position.
 202                                         gui.update(sequencer.getTickPosition());
 203
 204                                         // Puts the thread to sleep for as long as it takes
 205                                         // the sequencer to reach the next sixteenth.
 206                                         try {
 207                                                 sleep((long)((15000 / getTempo()) * (tickDiff / ticksPerSixteenth)));
 208                                         } catch (InterruptedException e) {
 209                                                 Moosique.stop();
 210                                         }
 211                                 }
 212                                 Moosique.stop();
 213                         }
 214                 };
 215                 player.start();
 216         }
 217
 218         /**
 219          * Stops playback of the current sequence.
 220          */
 221         public static void stop() {
 222                 if (sequencer.isRunning()) {
 223                         sequencer.stop();
 224                 }
 225                 sequencer.setTickPosition(editPosition);
 226                 if (player != null) player.interrupt();
 227                 gui.update((long)0);
 228         }
 229
 230         /**
 231          * Returns the current editing position of the sequencer.
 232          * @return the tick position
 233          */
 234         public static long getEditPosition() {
 235                 return editPosition;
 236         }
 237
 238         /**
 239          * Sets the current editing position of the sequencer.
 240          * @param ticks         the tick position
 241          */
 242         public static void setEditPosition(long ticks) {
 243                 editPosition = ticks;
 244         }
 245
 246         /**
 247          * Returns the tempo of the current sequence.
 248          * @return the tick position
 249          */
 250         public static int getTempo() {
 251                 return 120;
 252                 // if (tempoMsg == null) return 0;
 253         }
 254
 255         /**
 256          * Sets the current editing position of the sequencer.
 257          * @param ticks         the tick position
 258          */
 259         public static void setTempo(int bpm) {
 260                 // tempoMsg
 261         }
 262
 263         /**
 264          * Returns the tempo of the current sequence.
 265          * @return the tick position
 266          */
 267         public static int[] getTimeSig() {
 268                 int[] ts = {4, 4};
 269                 return ts;
 270                 // if (timeSigMsg == null) return 0;
 271         }
 272
 273         /**
 274          * Sets the current editing position of the sequencer.
 275          * @param ticks         the tick position
 276          */
 277         public static void setTimeSig(int bpm) {
 278                 // timeSigMsg
 279         }
 280
 281         /**
 282          * Returns true if the current sequence has been edited.
 283          * @return the tick position
 284          */
 285         public static boolean isEdited() {
 286                 return isEdited;
 287         }
 288
 289         /**
 290          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 291          */
 292         public static void setEdited() {
 293                 isEdited = true;
 294         }
 295
 296         /**
 297          * Rewinds the current sequence the given number of measures.
 298          * @param measures      the number of measures to rewind
 299          */
 300         public static void rewind(long ticks) {
 301                 editPosition -= ticks;
 302         }
 303
 304         /**
 305          * Fast forwards the current sequence the given number of measures.
 306          * @param measures      the number of measures to fast forward
 307          */
 308         public static void forward(long ticks) {
 309                 editPosition += ticks;
 310         }
 311
 312         /**
 313          * Shows the given message in the status bar.
 314          * @param text  the message to show
 315          */
 316         public static boolean shouldBeDrawn(Track track) {
 317                 if (drawEmptyTracks) return true;
 318                 else return (!emptyTracks.contains(track));
 319         }
 320
 321
 322         /**
 323          * Shows the given message in the status bar.
 324          * @param text  the message to show
 325          */
 326         public static void setDrawEmptyTracks(boolean state) {
 327                 drawEmptyTracks = state;
 328         }
 329
 330         /**
 331          * Loads the MooSequence in the given file.
 332          * @param filename      the filename to use
 333          */
 334         public static boolean load(String file) {
 335                 // Loads sequence from file
 336                 filename = file;
 337                 try {
 338                         seq = MidiSystem.getSequence(new File(filename));
 339                 } catch (InvalidMidiDataException e) {
 340                         return false;
 341                 } catch (IOException e) {
 342                         return false;
 343                 }
 344                 isEdited = false;
 345
 346                 Track[] tracks = seq.getTracks();
 347                 emptyTracks = new ArrayList();
 348
 349                 // Searches track 0 for changes in tempo and time signature.
 350                 MidiEvent event;
 351                 MetaMessage metaMsg;
 352                 ArrayList ts = new ArrayList(), tc = new ArrayList();
 353                 for (int i = 0; i < tracks[0].size(); i++) {
 354                         event = tracks[0].get(i);
 355                         if (event.getMessage().getStatus() == MetaMessage.META) {
 356                                 metaMsg = (MetaMessage)event.getMessage();
 357                                 switch(metaMsg.getType()) {
 358                                         case 81: tc.add(event); break;
 359                                         case 88: ts.add(event);
 360                                 }
 361                         }
 362                 }
 363 //              timeSignatures = ts.toArray(timeSignatures);
 364 //              tempoChanges = tc.toArray(tempoChanges);
 365
 366                 // Wraps each NoteOn event with its NoteOff event in a MooNote
 367                 ArrayList noteOns, noteOffs;
 368                 for (int i = 0; i < tracks.length; i++) {
 369                         // Searches the sequence for NoteOn and NoteOff events
 370                         noteOns = new ArrayList(tracks[i].size() / 2);
 371                         noteOffs = new ArrayList(tracks[i].size() / 2);
 372                         for (int j = 0; j < tracks[i].size(); j++) {
 373                                 event = tracks[i].get(j);
 374                                 if (event.getMessage().getStatus() >= 144 &&
 375                                     event.getMessage().getStatus() < 160) noteOns.add(event);
 376                                 if (event.getMessage().getStatus() >= 128 &&
 377                                     event.getMessage().getStatus() < 144) noteOffs.add(event);
 378                         }
 379                         noteOns.trimToSize();
 380                         noteOffs.trimToSize();
 381                         boolean isEmpty = (noteOns.size() == 0);
 382                         String text = "Track " + i + " has " + noteOns.size() + "/" + noteOffs.size() + "/" + tracks[i].size();
 383                         if (isEmpty) {
 384                                 text += " and will be removed.";
 385                                 emptyTracks.add(tracks[i]);
 386                         }
 387                         System.out.println(text);
 388
 389                         // Sorts the note lists by tick position.
 390                         Comparator c = new Comparator() {
 391                                 public int compare(Object o1, Object o2) {
 392                                         return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
 393                                 }
 394                         };
 395                         Collections.sort(noteOns, c);
 396                         Collections.sort(noteOffs, c);
 397
 398                         // For each NoteOn event, finds its NoteOff event and replaces it with a MooNote.
 399                         Iterator iOn = noteOns.iterator(), iOff;
 400                         MidiEvent on, off = null, nextOff;
 401                         ShortMessage onMsg, nextOffMsg;
 402                         while(iOn.hasNext()) {
 403                                 on = (MidiEvent)iOn.next();
 404                                 onMsg = (ShortMessage)on.getMessage();
 405                                 iOff = noteOffs.iterator();
 406                                 while(iOff.hasNext()) {
 407                                         nextOff = (MidiEvent)iOff.next();
 408                                         nextOffMsg = (ShortMessage)nextOff.getMessage();
 409                                         if(onMsg.getChannel() == nextOffMsg.getChannel() &&
 410                                            onMsg.getData1() == nextOffMsg.getData1() &&
 411                                            c.compare(nextOff, on) > 0) {
 412                                                 off = nextOff;
 413                                                 iOff.remove();
 414                                                 break;
 415                                         }
 416
 417                                 }
 418                                 tracks[i].remove(on);
 419                                 if (off != null) {
 420                                         tracks[i].add(new MooNote(on, off));
 421                                 } else {
 422                                         tracks[i].add(new MooNote(on));
 423                                 }
 424                                 iOn.remove();
 425                         }
 426                 }
 427
 428         /*
 429                 Collections.sort(track[i].events, new Comparator() {
 430                         public int compare(Object o1, Object o2) {
 431                                 return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 432                         }
 433                 });
 434
 435                 // Searches the sequence for NoteOn events
 436                 MidiEvent noteOn, noteOff = null, nextEvent;
 437                 MidiMessage nextMsg;
 438                 ShortMessage shortMsg;
 439
 440                 for (int i = 0; i < tracks.length; i++) {
 441                         for (int j = 0; j < tracks[i].size(); j++) {
 442                                 noteOn = tracks[i].get(j);
 443                                 if (noteOn.getMessage().getStatus() == ShortMessage.NOTE_ON) {
 444                                         // Finds the corresponding NoteOff event
 445                                         for (int k = j + 1; k < tracks[i].size(); k++) {
 446                                                 nextEvent = tracks[i].get(k);
 447                                                 nextMsg = nextEvent.getMessage();
 448                                                 if (nextMsg instanceof ShortMessage) {
 449                                                         shortMsg = (ShortMessage) nextMsg;
 450                                                         if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 451                                                                 noteOff = nextEvent;
 452                                                                 break;
 453                                                         }
 454                                                 }
 455                                         }
 456                                         // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 457                                         tracks[i].remove(noteOn);
 458                                         if (noteOff != null) {
 459                                                 tracks[i].add(new MooNote(noteOn, noteOff));
 460                                         } else {
 461                                                 tracks[i].add(new MooNote(noteOn));
 462                                         }
 463                                 }
 464                         }
 465                 }
 466 */
 467                 // Sends sequence to GUI and sequencer, then returns
 468                 if (gui != null) gui.setSequence(seq);
 469                 try {
 470                         sequencer.setSequence(seq);
 471                 } catch (InvalidMidiDataException e) {}
 472                 return true;
 473         }
 474
 475         /**
 476          * Saves the current sequence to the given filename
 477          * @param file  the filename to use
 478          */
 479         public static void saveAs(String file) {
 480                 try {
 481                         MidiSystem.write(seq, 1, new File(filename));
 482                 } catch (IOException e) {}
 483                 filename = file;
 484                 gui.setStatus("Saved " + file);
 485         }
 486
 487         /**
 488          * Saves the current sequence to the previously given filename.
 489          */
 490         public static void save() {
 491                 saveAs(filename);
 492         }
 493
 494         /**
 495          * Releases all reserved devices and exits the program.
 496          */
 497         public static void quit() {
 498                 if (sequencer.isOpen()) sequencer.close();
 499                 if (synthesizer.isOpen()) synthesizer.close();
 500                 System.exit(0);
 501         }
 502 }