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                         emptyTracks = new ArrayList();
 157                 } catch (InvalidMidiDataException e) {}
 158                 // Sends sequence to GUI.
 159                 if (gui != null) gui.setSequence(seq);
 160         }
 161
 162         /**
 163          * Starts playback of the current sequence.
 164          */
 165         public static void play() {
 166                 sequencer.setTickPosition(editPosition);
 167                 resume();
 168         }
 169
 170         /**
 171          * Pauses playback of the current sequence.
 172          */
 173         public static void pause() {
 174                 if (sequencer.isRunning()) {
 175                         sequencer.stop();
 176                 }
 177                 if (player != null) player.interrupt();
 178         }
 179
 180         /**
 181          * Resumes playback of the current sequence.
 182          */
 183         public static void resume() {
 184                 gui.update(0);
 185                 sequencer.start();
 186
 187                 // Disables input to volatile components
 188                 // gui.disable();
 189
 190                 // Creates the visualisation thread and starts it.
 191                 player = new Thread () {
 192                         public void run() {
 193                                 long ticksPerSixteenth = seq.getResolution()/4;
 194                                 System.out.println("Ticks/16: " + ticksPerSixteenth);
 195                                 long position = sequencer.getTickPosition();
 196                                 while(sequencer.isRunning()) {
 197                                         long pos = sequencer.getTickPosition();
 198                                         long tickDiff = pos - position;
 199                                         System.out.print(" ... " + tickDiff);
 200                                         position = pos;
 201
 202                                         // Updates the GUI with the current tick position.
 203                                         gui.update(sequencer.getTickPosition());
 204
 205                                         // Puts the thread to sleep for as long as it takes
 206                                         // the sequencer to reach the next sixteenth.
 207                                         try {
 208                                                 //sleep((long)((15000 / getTempo()) * (tickDiff / ticksPerSixteenth)));
 209                                                 sleep (10);
 210                                         } catch (InterruptedException e) {
 211                                                 Moosique.stop();
 212                                         }
 213                                 }
 214                                 Moosique.stop();
 215                         }
 216                 };
 217                 player.start();
 218         }
 219
 220         /**
 221          * Stops playback of the current sequence.
 222          */
 223         public static void stop() {
 224                 if (sequencer.isRunning()) {
 225                         sequencer.stop();
 226                 }
 227                 sequencer.setTickPosition(editPosition);
 228                 if (player != null) player.interrupt();
 229                 gui.update((long)0);
 230         }
 231
 232         /**
 233          * Returns the current editing position of the sequencer.
 234          * @return the tick position
 235          */
 236         public static long getEditPosition() {
 237                 return editPosition;
 238         }
 239
 240         /**
 241          * Sets the current editing position of the sequencer.
 242          * @param ticks         the tick position
 243          */
 244         public static void setEditPosition(long ticks) {
 245                 editPosition = ticks;
 246         }
 247
 248         /**
 249          * Returns the tempo of the current sequence.
 250          * @return the tick position
 251          */
 252         public static int getTempo() {
 253                 return 120;
 254                 // if (tempoMsg == null) return 0;
 255         }
 256
 257         /**
 258          * Sets the current editing position of the sequencer.
 259          * @param ticks         the tick position
 260          */
 261         public static void setTempo(int bpm) {
 262                 // tempoMsg
 263         }
 264
 265         /**
 266          * Returns the tempo of the current sequence.
 267          * @return the tick position
 268          */
 269         public static int[] getTimeSig() {
 270                 int[] ts = {4, 4};
 271                 return ts;
 272                 // if (timeSigMsg == null) return 0;
 273         }
 274
 275         /**
 276          * Sets the current editing position of the sequencer.
 277          * @param ticks         the tick position
 278          */
 279         public static void setTimeSig(int bpm) {
 280                 // timeSigMsg
 281         }
 282
 283         /**
 284          * Returns true if the current sequence has been edited.
 285          * @return the tick position
 286          */
 287         public static boolean isEdited() {
 288                 return isEdited;
 289         }
 290
 291         /**
 292          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 293          */
 294         public static void setEdited() {
 295                 isEdited = true;
 296         }
 297
 298         /**
 299          * Rewinds the current sequence the given number of measures.
 300          * @param measures      the number of measures to rewind
 301          */
 302         public static void rewind(long ticks) {
 303                 editPosition -= ticks;
 304         }
 305
 306         /**
 307          * Fast forwards the current sequence the given number of measures.
 308          * @param measures      the number of measures to fast forward
 309          */
 310         public static void forward(long ticks) {
 311                 editPosition += ticks;
 312         }
 313
 314         /**
 315          * Returns whether the given track should be drawn
 316          * @return true if the given track should be drawn
 317          */
 318         public static boolean shouldBeDrawn(Track track) {
 319                 if (drawEmptyTracks) return true;
 320                 else return (!emptyTracks.contains(track));
 321         }
 322
 323
 324         /**
 325          * Sets whether empty tracks should be drawn
 326          * @param state         true if empty tracks should be drawn
 327          */
 328         public static void setDrawEmptyTracks(boolean state) {
 329                 drawEmptyTracks = state;
 330         }
 331
 332         /**
 333          * Loads the MooSequence in the given file.
 334          * @param filename      the filename to use
 335          */
 336         public static boolean load(String file) {
 337                 // Loads sequence from file
 338                 filename = file;
 339                 try {
 340                         seq = MidiSystem.getSequence(new File(filename));
 341                 } catch (InvalidMidiDataException e) {
 342                         return false;
 343                 } catch (IOException e) {
 344                         return false;
 345                 }
 346                 isEdited = false;
 347
 348                 Track[] tracks = seq.getTracks();
 349                 emptyTracks = new ArrayList();
 350
 351                 // Searches track 0 for changes in tempo and time signature.
 352                 MidiEvent event;
 353                 MetaMessage metaMsg;
 354                 ArrayList ts = new ArrayList(), tc = new ArrayList();
 355                 for (int i = 0; i < tracks[0].size(); i++) {
 356                         event = tracks[0].get(i);
 357                         if (event.getMessage().getStatus() == MetaMessage.META) {
 358                                 metaMsg = (MetaMessage)event.getMessage();
 359                                 switch(metaMsg.getType()) {
 360                                         case 81: tc.add(event); break;
 361                                         case 88: ts.add(event);
 362                                 }
 363                         }
 364                 }
 365 //              timeSignatures = ts.toArray(timeSignatures);
 366 //              tempoChanges = tc.toArray(tempoChanges);
 367
 368                 // Wraps each NoteOn event with its NoteOff event in a MooNote
 369                 ArrayList noteOns, noteOffs;
 370                 for (int i = 0; i < tracks.length; i++) {
 371                         // Searches the sequence for NoteOn and NoteOff events
 372                         noteOns = new ArrayList(tracks[i].size() / 2);
 373                         noteOffs = new ArrayList(tracks[i].size() / 2);
 374                         for (int j = 0; j < tracks[i].size(); j++) {
 375                                 event = tracks[i].get(j);
 376                                 if (event.getMessage().getStatus() >= 144 &&
 377                                     event.getMessage().getStatus() < 160) noteOns.add(event);
 378                                 if (event.getMessage().getStatus() >= 128 &&
 379                                     event.getMessage().getStatus() < 144) noteOffs.add(event);
 380                         }
 381                         noteOns.trimToSize();
 382                         noteOffs.trimToSize();
 383                         if (noteOns.size() == 0) emptyTracks.add(tracks[i]);
 384
 385                         // Sorts the note lists by tick position.
 386                         Comparator c = new Comparator() {
 387                                 public int compare(Object o1, Object o2) {
 388                                         return (int)(((MidiEvent)o1).getTick() - ((MidiEvent)o2).getTick());
 389                                 }
 390                         };
 391                         Collections.sort(noteOns, c);
 392                         Collections.sort(noteOffs, c);
 393
 394                         // For each NoteOn event, finds its NoteOff event and replaces it with a MooNote.
 395                         Iterator iOn = noteOns.iterator(), iOff;
 396                         MidiEvent on, off = null, nextOff;
 397                         ShortMessage onMsg, nextOffMsg;
 398                         while(iOn.hasNext()) {
 399                                 on = (MidiEvent)iOn.next();
 400                                 onMsg = (ShortMessage)on.getMessage();
 401                                 iOff = noteOffs.iterator();
 402                                 while(iOff.hasNext()) {
 403                                         nextOff = (MidiEvent)iOff.next();
 404                                         nextOffMsg = (ShortMessage)nextOff.getMessage();
 405                                         if(onMsg.getChannel() == nextOffMsg.getChannel() &&
 406                                            onMsg.getData1() == nextOffMsg.getData1() &&
 407                                            c.compare(nextOff, on) > 0) {
 408                                                 off = nextOff;
 409                                                 iOff.remove();
 410                                                 break;
 411                                         }
 412
 413                                 }
 414                                 tracks[i].remove(on);
 415                                 if (off != null) {
 416                                         tracks[i].add(new MooNote(on, off));
 417                                 } else {
 418                                         tracks[i].add(new MooNote(on));
 419                                 }
 420                                 iOn.remove();
 421                         }
 422                 }
 423
 424                 // Sends sequence to GUI and sequencer, then returns
 425                 if (gui != null) gui.setSequence(seq);
 426                 try {
 427                         sequencer.setSequence(seq);
 428                 } catch (InvalidMidiDataException e) {}
 429                 return true;
 430         }
 431
 432         /**
 433          * Saves the current sequence to the given filename
 434          * @param file  the filename to use
 435          */
 436         public static void saveAs(String file) {
 437                 try {
 438                         MidiSystem.write(seq, 1, new File(filename));
 439                 } catch (IOException e) {}
 440                 filename = file;
 441                 gui.setStatus("Saved " + file);
 442         }
 443
 444         /**
 445          * Saves the current sequence to the previously given filename.
 446          */
 447         public static void save() {
 448                 saveAs(filename);
 449         }
 450
 451         /**
 452          * Releases all reserved devices and exits the program.
 453          */
 454         public static void quit() {
 455                 if (sequencer.isOpen()) sequencer.close();
 456                 if (synthesizer.isOpen()) synthesizer.close();
 457                 System.exit(0);
 458         }
 459 }