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