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 MetaMessage tempoMsg, timeSigMsg;
  23
  24         private static String filename, fileArg;
  25         private static long editPosition;
  26         private static boolean makeGUI = true, isEdited;
  27         private static Thread player;
  28         public static final int DEFAULT_RESOLUTION = 96, DEFAULT_TRACKS = 4;
  29
  30         /**
  31          * Starts the application.
  32          */
  33         public static void main (String[] args) {
  34                 System.out.println("\nMoosique version 1.0\n");
  35
  36                 // Parses command-line arguments.
  37                 for (int i = 0; i < args.length; i++) {
  38                         if (args[i].equals("-n")) {makeGUI = false;}
  39                         else if (fileArg == null) {fileArg = args[i];}
  40                 }
  41
  42                 // Acquires MIDI devices and connects them.
  43                 System.out.print("Initializing MIDI devices.");
  44                 try {
  45                         sequencer = MidiSystem.getSequencer();
  46                         System.out.print(".");
  47                         sequencer.open();
  48                         synthesizer = MidiSystem.getSynthesizer();
  49                         System.out.print(".");
  50                         synthesizer.open();
  51                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  52                         channels = synthesizer.getChannels();
  53                         setActiveChannel(0);
  54                 } catch (MidiUnavailableException e) {
  55                         System.out.println("Failed, quitting.");
  56 //                      System.exit(1);
  57                 }
  58                 System.out.println("Done");
  59
  60                 //If a filename is given as the command-line argument, attempts to load a sequence from the file.
  61                 if (fileArg != null) {
  62                         System.out.print("Loading MIDI sequence from " + fileArg + "...");
  63                         if (!load(fileArg)) {
  64                                 System.out.println("Failed");
  65                                 clearSequence();
  66                         } else {
  67                                 System.out.println("Done");
  68                         }
  69                 } else {
  70                         // Otherwise creates a new empty one.
  71                         clearSequence();
  72                 }
  73
  74                 // Builds GUI, unless n-flag is set.
  75                 if (makeGUI) {
  76                         System.out.print("Building GUI...");
  77                         try {
  78                                 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  79                         } catch (Exception e) {}
  80                         gui = new MooGUI(seq);
  81                         System.out.println("Done");
  82                 } else {
  83                         System.out.print("Playing...");
  84                         play();
  85                         while (sequencer.isRunning()) {}
  86                         System.out.println("Done");
  87                         quit();
  88                 }
  89         }
  90
  91         /**
  92          * Returns the GUI.
  93          * @return the GUI
  94          */
  95         public static MooGUI getGUI() {
  96                 return gui;
  97         }
  98
  99         /**
 100          * Returns the current sequence.
 101          * @return the current sequence
 102          */
 103         public static Sequence getSequence() {
 104                 return seq;
 105         }
 106
 107         /**
 108          * Returns the current sequencer.
 109          * @return the current sequencer
 110          */
 111         public static Sequencer getSequencer() {
 112                 return sequencer;
 113         }
 114
 115         /**
 116          * Returns the MidiChannels of the selected synthesizer.
 117          * @return the available MidiChannels
 118          */
 119         public static MidiChannel[] getChannels() {
 120                 return channels;
 121         }
 122
 123         /**
 124          * Returns the MidiChannels of the selected synthesizer.
 125          * @return the available MidiChannels
 126          */
 127         public static MidiChannel getChannel(int i) {
 128                 return channels[i];
 129         }
 130
 131         /**
 132          * Returns the currently active MidiChannel.
 133          * @return the active MidiChannel
 134          */
 135         public static MidiChannel getActiveChannel() {
 136                 return activeChannel;
 137         }
 138
 139         /**
 140          * Sets the currently active MidiChannel.
 141          * @param channel       the number of the MidiChannel to activate
 142          */
 143         public static void setActiveChannel(int channel) {
 144                 activeChannel = channels[channel];
 145         }
 146
 147         /**
 148          * Replaces the current sequence with a new one, holding three empty tracks.
 149          */
 150         public static void clearSequence() {
 151                 // Creates a new sequence and sends it to the sequencer.
 152                 try {
 153                         seq = new Sequence(Sequence.PPQ, DEFAULT_RESOLUTION, DEFAULT_TRACKS);
 154                         sequencer.setSequence(seq);
 155                 } catch (InvalidMidiDataException e) {}
 156                 // Sends sequence to GUI.
 157                 if (gui != null) gui.setSequence(seq);
 158         }
 159
 160         /**
 161          * Starts playback of the current sequence.
 162          */
 163         public static void play() {
 164                 sequencer.setTickPosition(editPosition);
 165                 resume();
 166         }
 167
 168         /**
 169          * Pauses playback of the current sequence.
 170          */
 171         public static void pause() {
 172                 if (sequencer.isRunning()) {
 173                         sequencer.stop();
 174                 }
 175                 if (player != null) player.interrupt();
 176         }
 177
 178         /**
 179          * Resumes playback of the current sequence.
 180          */
 181         public static void resume() {
 182                 gui.update(0);
 183                 sequencer.start();
 184
 185                 // Disables input to volatile components
 186                 // gui.disable();
 187
 188                 // Creates the visualization thread and starts it.
 189                 player = new Thread () {
 190                         public void run() {
 191                                 while(sequencer.isRunning()) {
 192                                         // Updates the GUI with the current tick position.
 193                                         gui.update(sequencer.getTickPosition());
 194
 195                                         // Puts the thread to sleep for as long as it takes
 196                                         // the sequencer to reach the next sixteenth.
 197                                         try {
 198                                                 sleep((long)((1000 * 60 * 1) / (getTempo() * 4)));
 199                                         } catch (InterruptedException e) {
 200                                                 Moosique.stop();
 201                                         }
 202                                 }
 203                                 Moosique.stop();
 204                         }
 205                 };
 206                 player.start();
 207         }
 208
 209         /**
 210          * Stops playback of the current sequence.
 211          */
 212         public static void stop() {
 213                 if (sequencer.isRunning()) {
 214                         sequencer.stop();
 215                 }
 216                 sequencer.setTickPosition(editPosition);
 217                 if (player != null) player.interrupt();
 218                 gui.update((long)0);
 219         }
 220
 221         /**
 222          * Returns the current editing position of the sequencer.
 223          * @return the tick position
 224          */
 225         public static long getPosition() {
 226                 return editPosition;
 227         }
 228
 229         /**
 230          * Sets the current editing position of the sequencer.
 231          * @param ticks         the tick position
 232          */
 233         public static void setPosition(long ticks) {
 234                 editPosition = ticks;
 235         }
 236
 237         /**
 238          * Returns the tempo of the current sequence.
 239          * @return the tick position
 240          */
 241         public static int getTempo() {
 242                 return 120;
 243                 // if (tempoMsg == null) return 0;
 244         }
 245
 246         /**
 247          * Sets the current editing position of the sequencer.
 248          * @param ticks         the tick position
 249          */
 250         public static void setTempo(int bpm) {
 251                 // tempoMsg
 252         }
 253
 254         /**
 255          * Returns the tempo of the current sequence.
 256          * @return the tick position
 257          */
 258         public static int[] getTimeSig() {
 259                 int[] ts = {4, 4};
 260                 return ts;
 261                 // if (timeSigMsg == null) return 0;
 262         }
 263
 264         /**
 265          * Sets the current editing position of the sequencer.
 266          * @param ticks         the tick position
 267          */
 268         public static void setTimeSig(int bpm) {
 269                 // timeSigMsg
 270         }
 271
 272         /**
 273          * Returns true if the current sequence has been edited.
 274          * @return the tick position
 275          */
 276         public static boolean isEdited() {
 277                 return isEdited;
 278         }
 279
 280         /**
 281          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 282          */
 283         public static void setEdited() {
 284                 isEdited = true;
 285         }
 286
 287         /**
 288          * Rewinds the current sequence the given number of measures.
 289          * @param measures      the number of measures to rewind
 290          */
 291         public static void rewind(long ticks) {
 292                 editPosition -= ticks;
 293         }
 294
 295         /**
 296          * Fast forwards the current sequence the given number of measures.
 297          * @param measures      the number of measures to fast forward
 298          */
 299         public static void forward(long ticks) {
 300                 editPosition += ticks;
 301         }
 302
 303         /**
 304          * Loads the MooSequence in the given file.
 305          * @param filename      the filename to use
 306          */
 307         public static boolean load(String file) {
 308                 // Loads sequence from file
 309                 filename = file;
 310                 try {
 311                         seq = MidiSystem.getSequence(new File(filename));
 312                 } catch (InvalidMidiDataException e) {
 313                         return false;
 314                 } catch (IOException e) {
 315                         return false;
 316                 }
 317                 isEdited = false;
 318
 319                 Track[] tracks = seq.getTracks();
 320
 321                 // Stores tempo and time signature.
 322                 MidiMessage msg;
 323                 MetaMessage metaMsg;
 324                 for (int i = 0; i < tracks[0].size(); i++) {
 325                         msg = tracks[0].get(i).getMessage();
 326                         if (msg.getStatus() == MetaMessage.META) {
 327                                 metaMsg = (MetaMessage)msg;
 328                                 if (metaMsg.getType() == 81) {
 329                                         tempoMsg = metaMsg;
 330                                 } else if (metaMsg.getType() == 88) {
 331                                         timeSigMsg = (MetaMessage)msg;
 332                                 }
 333
 334                         }
 335                 }
 336
 337                 // Searches the sequence for NoteOn events
 338                 MidiEvent noteOn, noteOff = null, nextEvent;
 339                 MidiMessage nextMsg;
 340                 ShortMessage shortMsg;
 341                 ArrayList noteOns, noteOffs;
 342                 for (int i = 0; i < tracks.length; i++) {
 343                          noteOns = new ArrayList(tracks.length);
 344         /*
 345                         Collections.sort(track[i].events, new Comparator() {
 346                                 public int compare(Object o1, Object o2) {
 347                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 348                                 }
 349                         });
 350         */
 351                         for (int j = 0; j < tracks[i].size(); j++) {
 352                                 noteOn = tracks[i].get(j);
 353                                 if (noteOn.getMessage().getStatus() == ShortMessage.NOTE_ON) {
 354                                         // Finds the corresponding NoteOff event
 355                                         for (int k = j + 1; k < tracks[i].size(); k++) {
 356                                                 nextEvent = tracks[i].get(k);
 357                                                 nextMsg = nextEvent.getMessage();
 358                                                 if (nextMsg instanceof ShortMessage) {
 359                                                         shortMsg = (ShortMessage) nextMsg;
 360                                                         if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 361                                                                 noteOff = nextEvent;
 362                                                                 break;
 363                                                         }
 364                                                 }
 365                                         }
 366                                         // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 367                                         tracks[i].remove(noteOn);
 368                                         if (noteOff != null) {
 369                                                 tracks[i].add(new MooNote(noteOn, noteOff));
 370                                         } else {
 371                                                 tracks[i].add(new MooNote(noteOn));
 372                                         }
 373                                 }
 374                         }
 375                 }
 376                 // Sends sequence to GUI and sequencer, then returns
 377                 if (gui != null) gui.setSequence(seq);
 378                 try {
 379                         sequencer.setSequence(seq);
 380                 } catch (InvalidMidiDataException e) {}
 381                 return true;
 382         }
 383
 384         /**
 385          * Saves the current sequence to the given filename
 386          * @param file  the filename to use
 387          */
 388         public static void saveAs(String file) {
 389                 try {
 390                         MidiSystem.write(seq, 1, new File(filename));
 391                 } catch (IOException e) {}
 392                 filename = file;
 393                 gui.setStatus("Saved " + file);
 394         }
 395
 396         /**
 397          * Saves the current sequence to the previously given filename.
 398          */
 399         public static void save() {
 400                 saveAs(filename);
 401         }
 402
 403         /**
 404          * Releases all reserved devices and exits the program.
 405          */
 406         public static void quit() {
 407                 if (sequencer.isOpen()) sequencer.close();
 408                 if (synthesizer.isOpen()) synthesizer.close();
 409                 System.exit(0);
 410         }
 411 }