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 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, 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()) gui.update(sequencer.getTickPosition());
 192                                 Moosique.stop();
 193                         }
 194                 };
 195                 player.start();
 196         }
 197
 198         /**
 199          * Stops playback of the current sequence.
 200          */
 201         public static void stop() {
 202                 if (sequencer.isRunning()) {
 203                         sequencer.stop();
 204                 }
 205                 sequencer.setTickPosition(editPosition);
 206                 if (player != null) player.interrupt();
 207                 gui.update((long)0);
 208         }
 209
 210         /**
 211          * Returns the current editing position of the sequencer.
 212          * @return the tick position
 213          */
 214         public static long getPosition() {
 215                 return editPosition;
 216         }
 217
 218         /**
 219          * Sets the current editing position of the sequencer.
 220          * @param ticks         the tick position
 221          */
 222         public static void setPosition(long ticks) {
 223                 editPosition = ticks;
 224         }
 225
 226         /**
 227          * Returns the tempo of the current sequence.
 228          * @return the tick position
 229          */
 230         public static int getTempo() {
 231                 if (tempoMsg == null) return 0;
 232                 return 120;
 233         }
 234
 235         /**
 236          * Sets the current editing position of the sequencer.
 237          * @param ticks         the tick position
 238          */
 239         public static void setTempo(int bpm) {
 240                 // tempoMsg, timeSigMsg
 241         }
 242
 243         /**
 244          * Returns the tempo of the current sequence.
 245          * @return the tick position
 246          */
 247         public static int getTimeSig() {
 248                 if (timeSigMsg == null) return 0;
 249                 return 120;
 250         }
 251
 252         /**
 253          * Sets the current editing position of the sequencer.
 254          * @param ticks         the tick position
 255          */
 256         public static void setTimeSig(int bpm) {
 257                 // tempoMsg, timeSigMsg
 258         }
 259
 260         /**
 261          * Returns true if the current sequence has been edited.
 262          * @return the tick position
 263          */
 264         public static boolean isEdited() {
 265                 return isEdited;
 266         }
 267
 268         /**
 269          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 270          */
 271         public static void setEdited() {
 272                 isEdited = true;
 273         }
 274
 275         /**
 276          * Rewinds the current sequence the given number of measures.
 277          * @param measures      the number of measures to rewind
 278          */
 279         public static void rewind(long ticks) {
 280                 editPosition -= ticks;
 281         }
 282
 283         /**
 284          * Fast forwards the current sequence the given number of measures.
 285          * @param measures      the number of measures to fast forward
 286          */
 287         public static void forward(long ticks) {
 288                 editPosition += ticks;
 289         }
 290
 291         /**
 292          * Loads the MooSequence in the given file.
 293          * @param filename      the filename to use
 294          */
 295         public static boolean load(String file) {
 296                 // Loads sequence from file
 297                 filename = file;
 298                 try {
 299                         seq = MidiSystem.getSequence(new File(filename));
 300                 } catch (InvalidMidiDataException e) {
 301                         return false;
 302                 } catch (IOException e) {
 303                         return false;
 304                 }
 305                 isEdited = false;
 306
 307                 Track[] tracks = seq.getTracks();
 308
 309                 // Stores tempo and time signature.
 310                 MidiMessage msg;
 311                 MetaMessage metaMsg;
 312                 for (int i = 0; i < tracks[0].size(); i++) {
 313                         msg = tracks[0].get(i).getMessage();
 314                         if (msg.getStatus() == MetaMessage.META) {
 315                                 metaMsg = (MetaMessage)msg;
 316                                 if (metaMsg.getType() == 81) {
 317                                         tempoMsg = metaMsg;
 318                                 } else if (metaMsg.getType() == 88) {
 319                                         timeSigMsg = (MetaMessage)msg;
 320                                 }
 321
 322                         }
 323                 }
 324
 325                 // Searches the sequence for NoteOn events
 326                 MidiEvent noteOn, noteOff = null, nextEvent;
 327                 MidiMessage nextMsg;
 328                 ShortMessage shortMsg;
 329                 ArrayList noteOns, noteOffs;
 330                 for (int i = 0; i < tracks.length; i++) {
 331                          noteOns = new ArrayList(tracks.length);
 332         /*
 333                         Collections.sort(track[i].events, new Comparator() {
 334                                 public int compare(Object o1, Object o2) {
 335                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 336                                 }
 337                         });
 338         */
 339                         for (int j = 0; j < tracks[i].size(); j++) {
 340                                 noteOn = tracks[i].get(j);
 341                                 if (noteOn.getMessage().getStatus() == ShortMessage.NOTE_ON) {
 342                                         // Finds the corresponding NoteOff event
 343                                         for (int k = j + 1; k < tracks[i].size(); k++) {
 344                                                 nextEvent = tracks[i].get(k);
 345                                                 nextMsg = nextEvent.getMessage();
 346                                                 if (nextMsg instanceof ShortMessage) {
 347                                                         shortMsg = (ShortMessage) nextMsg;
 348                                                         if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 349                                                                 noteOff = nextEvent;
 350                                                                 break;
 351                                                         }
 352                                                 }
 353                                         }
 354                                         // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 355                                         tracks[i].remove(noteOn);
 356                                         if (noteOff != null) {
 357                                                 tracks[i].add(new MooNote(noteOn, noteOff));
 358                                         } else {
 359                                                 tracks[i].add(new MooNote(noteOn));
 360                                         }
 361                                 }
 362                         }
 363                 }
 364                 // Sends sequence to GUI and sequencer, then returns
 365                 if (gui != null) gui.setSequence(seq);
 366                 try {
 367                         sequencer.setSequence(seq);
 368                 } catch (InvalidMidiDataException e) {}
 369                 return true;
 370         }
 371
 372         /**
 373          * Saves the current sequence to the given filename
 374          * @param file  the filename to use
 375          */
 376         public static void saveAs(String file) {
 377                 try {
 378                         MidiSystem.write(seq, 1, new File(filename));
 379                 } catch (IOException e) {}
 380                 filename = file;
 381                 gui.setStatus("Saved " + file);
 382         }
 383
 384         /**
 385          * Saves the current sequence to the previously given filename.
 386          */
 387         public static void save() {
 388                 saveAs(filename);
 389         }
 390
 391         /**
 392          * Releases all reserved devices and exits the program.
 393          */
 394         public static void quit() {
 395                 if (sequencer.isOpen()) sequencer.close();
 396                 if (synthesizer.isOpen()) synthesizer.close();
 397                 System.exit(0);
 398         }
 399 }