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