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;
  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                 String fileArg = null;
  39                 for (int i = 0; i < args.length; i++) {
  40                         if (args[i].equals("-n")) {makeGUI = false;}
  41                         else if (fileArg == null) {fileArg = args[i];}
  42                 }
  43
  44                 // Acquires MIDI devices and connects them.
  45                 System.out.print("Initializing MIDI devices.");
  46                 try {
  47                         sequencer = MidiSystem.getSequencer();
  48                         System.out.print(".");
  49                         sequencer.open();
  50                         synthesizer = MidiSystem.getSynthesizer();
  51                         System.out.print(".");
  52                         synthesizer.open();
  53                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  54                         channels = synthesizer.getChannels();
  55                         setActiveChannel(0);
  56                 } catch (MidiUnavailableException e) {
  57                         System.out.println("Failed, quitting.");
  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, creating new sequence");
  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                         filename = null;
 157                         emptyTracks = new ArrayList();
 158                 } catch (InvalidMidiDataException e) {}
 159                 // Sends sequence to GUI.
 160                 if (gui != null) gui.setSequence(seq);
 161         }
 162
 163         /**
 164          * Starts playback of the current sequence.
 165          */
 166         public static void play() {
 167                 sequencer.setTickPosition(editPosition);
 168                 resume();
 169         }
 170
 171         /**
 172          * Pauses playback of the current sequence.
 173          */
 174         public static void pause() {
 175                 if (sequencer.isRunning()) {
 176                         sequencer.stop();
 177                 }
 178                 if (player != null) player.interrupt();
 179         }
 180
 181         /**
 182          * Resumes playback of the current sequence.
 183          */
 184         public static void resume() {
 185                 gui.update(0);
 186                 try {
 187                         sequencer.setSequence(seq);
 188                 } catch (InvalidMidiDataException e) {}
 189                 sequencer.start();
 190
 191                 // Disables input to volatile components
 192                 // gui.disable();
 193
 194                 // Creates the visualisation thread and starts it.
 195                 player = new Thread () {
 196                         public void run() {
 197                                 while(sequencer.isRunning()) {
 198                                         // Updates the GUI with the current tick position.
 199                                         gui.update(sequencer.getTickPosition());
 200
 201                                         // Puts the thread to sleep for as long as it takes
 202                                         // the sequencer to reach the next sixteenth.
 203                                         try {
 204                                                 //sleep((long)((15000 / getTempo()) * (tickDiff / ticksPerSixteenth)));
 205                                                 sleep (10);
 206                                         } catch (InterruptedException e) {
 207                                                 Moosique.stop();
 208                                         }
 209                                 }
 210                                 Moosique.stop();
 211                         }
 212                 };
 213                 player.start();
 214         }
 215
 216         /**
 217          * Stops playback of the current sequence.
 218          */
 219         public static void stop() {
 220                 if (sequencer.isRunning()) {
 221                         sequencer.stop();
 222                 }
 223                 sequencer.setTickPosition(editPosition);
 224                 if (player != null) player.interrupt();
 225                 gui.update((long)0);
 226         }
 227
 228         /**
 229          * Returns the current editing position of the sequencer.
 230          * @return the tick position
 231          */
 232         public static long getEditPosition() {
 233                 return editPosition;
 234         }
 235
 236         /**
 237          * Sets the current editing position of the sequencer.
 238          * @param ticks         the tick position
 239          */
 240         public static void setEditPosition(long ticks) {
 241                 editPosition = ticks;
 242         }
 243
 244         /**
 245          * Returns the tempo of the current sequence.
 246          * @return the tick position
 247          */
 248         public static int getTempo() {
 249                 return 120;
 250                 // if (tempoMsg == null) return 0;
 251         }
 252
 253         /**
 254          * Sets the current editing position of the sequencer.
 255          * @param ticks         the tick position
 256          */
 257         public static void setTempo(int bpm) {
 258                 // tempoMsg
 259         }
 260
 261         /**
 262          * Returns the tempo of the current sequence.
 263          * @return the tick position
 264          */
 265         public static int[] getTimeSig() {
 266                 int[] ts = {4, 4};
 267                 return ts;
 268                 // if (timeSigMsg == null) return 0;
 269         }
 270
 271         /**
 272          * Sets the current editing position of the sequencer.
 273          * @param ticks         the tick position
 274          */
 275         public static void setTimeSig(int bpm) {
 276                 // timeSigMsg
 277         }
 278
 279         /**
 280          * Returns true if the current sequence has been edited.
 281          * @return the tick position
 282          */
 283         public static boolean isEdited() {
 284                 return isEdited;
 285         }
 286
 287         /**
 288          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 289          */
 290         public static void setEdited() {
 291                 isEdited = true;
 292         }
 293
 294         /**
 295          * Rewinds the current sequence the given number of measures.
 296          * @param measures      the number of measures to rewind
 297          */
 298         public static void rewind(long ticks) {
 299                 editPosition -= ticks;
 300         }
 301
 302         /**
 303          * Fast forwards the current sequence the given number of measures.
 304          * @param measures      the number of measures to fast forward
 305          */
 306         public static void forward(long ticks) {
 307                 editPosition += ticks;
 308         }
 309
 310         /**
 311          * Returns whether the given track should be drawn
 312          * @return true if the given track should be drawn
 313          */
 314         public static boolean shouldBeDrawn(Track track) {
 315                 if (drawEmptyTracks) return true;
 316                 else return (!emptyTracks.contains(track));
 317         }
 318
 319
 320         /**
 321          * Sets whether empty tracks should be drawn
 322          * @param state         true if empty tracks should be drawn
 323          */
 324         public static void setDrawEmptyTracks(boolean state) {
 325                 drawEmptyTracks = state;
 326         }
 327
 328         /**
 329          * Loads the MooSequence in the given file.
 330          * @param filename      the filename to use
 331          */
 332         public static boolean load(String file) {
 333                 // Loads sequence from file
 334                 filename = file;
 335                 try {
 336                         seq = MidiSystem.getSequence(new File(filename));
 337                 } catch (InvalidMidiDataException e) {
 338                         return false;
 339                 } catch (IOException e) {
 340                         return false;
 341                 }
 342                 isEdited = false;
 343
 344                 Track[] tracks = seq.getTracks();
 345                 emptyTracks = new ArrayList();
 346
 347                 // Searches track 0 for changes in tempo and time signature.
 348                 MidiEvent event;
 349                 MetaMessage metaMsg;
 350                 ArrayList ts = new ArrayList(), tc = new ArrayList();
 351                 for (int i = 0; i < tracks[0].size(); i++) {
 352                         event = tracks[0].get(i);
 353                         if (event.getMessage().getStatus() == MetaMessage.META) {
 354                                 metaMsg = (MetaMessage)event.getMessage();
 355                                 switch(metaMsg.getType()) {
 356                                         case 81: tc.add(event); break;
 357                                         case 88: ts.add(event);
 358                                 }
 359                         }
 360                 }
 361 //              timeSignatures = ts.toArray(timeSignatures);
 362 //              tempoChanges = tc.toArray(tempoChanges);
 363
 364                 // Wraps each NoteOn event with its NoteOff event in a MooNote
 365                 ArrayList noteOns, noteOffs;
 366                 for (int i = 0; i < tracks.length; i++) {
 367                         // Searches the sequence for NoteOn and NoteOff events
 368                         noteOns = new ArrayList(tracks[i].size() / 2);
 369                         noteOffs = new ArrayList(tracks[i].size() / 2);
 370                         for (int j = 0; j < tracks[i].size(); j++) {
 371                                 event = tracks[i].get(j);
 372                                 if (event.getMessage().getStatus() >= 144 &&
 373                                     event.getMessage().getStatus() < 160) noteOns.add(event);
 374                                 if (event.getMessage().getStatus() >= 128 &&
 375                                     event.getMessage().getStatus() < 144) noteOffs.add(event);
 376                         }
 377                         noteOns.trimToSize();
 378                         noteOffs.trimToSize();
 379                         if (noteOns.size() == 0) emptyTracks.add(tracks[i]);
 380
 381                         // Sorts the note lists by tick position.
 382                         Comparator c = new Comparator() {
 383                                 public int compare(Object o1, Object o2) {
 384                                         return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
 385                                 }
 386                         };
 387                         Collections.sort(noteOns, c);
 388                         Collections.sort(noteOffs, c);
 389
 390                         // Replaces each NoteOn event it with a MooNote containing a reference to the NoteOff event.
 391                         Iterator iOn = noteOns.iterator(), iOff;
 392                         MidiEvent on, off = null, nextOff;
 393                         ShortMessage onMsg, nextOffMsg;
 394                         while(iOn.hasNext()) {
 395                                 on = (MidiEvent)iOn.next();
 396                                 onMsg = (ShortMessage)on.getMessage();
 397                                 iOff = noteOffs.iterator();
 398                                 while(iOff.hasNext()) {
 399                                         nextOff = (MidiEvent)iOff.next();
 400                                         nextOffMsg = (ShortMessage)nextOff.getMessage();
 401                                         if(onMsg.getChannel() == nextOffMsg.getChannel() &&
 402                                            onMsg.getData1() == nextOffMsg.getData1() &&
 403                                            c.compare(nextOff, on) > 0) {
 404                                                 off = nextOff;
 405                                                 iOff.remove();
 406                                                 break;
 407                                         }
 408
 409                                 }
 410                                 tracks[i].remove(on);
 411                                 if (off != null) {
 412                                         tracks[i].add(new MooNote(on, off));
 413                                 } else {
 414                                         tracks[i].add(new MooNote(on));
 415                                 }
 416                                 iOn.remove();
 417                         }
 418                 }
 419                 // Sends sequence to GUI and sequencer, then returns
 420                 if (gui != null) gui.setSequence(seq);
 421                 try {
 422                         sequencer.setSequence(seq);
 423                 } catch (InvalidMidiDataException e) {}
 424                 return true;
 425         }
 426
 427         /**
 428          * Saves the current sequence to the given filename
 429          * @param file  the filename to use
 430          */
 431         public static boolean saveAs(String file) {
 432                 try {
 433                         MidiSystem.write(seq, 1, new File(file));
 434                         filename = file;
 435                         gui.setStatus("Saved " + file);
 436                         return true;
 437                 } catch (IOException e) {
 438                         gui.setStatus("Failed in saving " + file);
 439                         return false;
 440                 }
 441         }
 442
 443         /**
 444          * Saves the current sequence to the previously given filename.
 445          */
 446         public static boolean save() {
 447                 if (filename == null) return false;
 448                 else {
 449                         saveAs(filename);
 450                         return true;
 451                 }
 452         }
 453
 454         /**
 455          * Releases all reserved devices and exits the program.
 456          */
 457         public static void quit() {
 458                 if (sequencer.isOpen()) sequencer.close();
 459                 if (synthesizer.isOpen()) synthesizer.close();
 460                 System.exit(0);
 461         }
 462 }