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 currently active MidiChannel.
 124          * @return the active MidiChannel
 125          */
 126         public static MidiChannel getActiveChannel() {
 127                 return activeChannel;
 128         }
 129
 130         /**
 131          * Sets the currently active MidiChannel.
 132          * @param channel       the number of the MidiChannel to activate
 133          */
 134         public static void setActiveChannel(int channel) {
 135                 activeChannel = channels[channel];
 136         }
 137
 138         /**
 139          * Replaces the current sequence with a new one, holding three empty tracks.
 140          */
 141         public static void clearSequence() {
 142                 // Creates a new sequence and sends it to the sequencer.
 143                 try {
 144                         seq = new Sequence(Sequence.PPQ, RESOLUTION, DEFAULT_TRACKS);
 145                         sequencer.setSequence(seq);
 146                 } catch (InvalidMidiDataException e) {}
 147                 // Sends sequence to GUI.
 148                 if (gui != null) gui.setSequence(seq);
 149         }
 150
 151         /**
 152          * Starts playback of the current sequence.
 153          */
 154         public static void play() {
 155                 sequencer.setTickPosition(position);
 156                 resume();
 157         }
 158
 159         /**
 160          * Pauses playback of the current sequence.
 161          */
 162         public static void pause() {
 163                 sequencer.stop();
 164                 player.interrupt();
 165         }
 166
 167         /**
 168          * Resumes playback of the current sequence.
 169          */
 170         public static void resume() {
 171                 sequencer.start();
 172
 173                 // Disables input to volatile components
 174                 // gui.disable();
 175
 176                 // Creates the visualization thread and starts it.
 177                 player = new Thread () {
 178                         public void run() {
 179                                 while(sequencer.isRunning()) gui.update(sequencer.getTickPosition());
 180                                 Moosique.stop();
 181                         }
 182                 };
 183                 player.start();
 184         }
 185
 186         /**
 187          * Stops playback of the current sequence.
 188          */
 189         public static void stop() {
 190                 sequencer.stop();
 191                 sequencer.setTickPosition(position);
 192                 player.interrupt();
 193                 gui.update((long)0);
 194         }
 195
 196         /**
 197          * Returns the current tick position of the sequencer.
 198          * @return the tick position
 199          */
 200         public static long getPosition() {
 201                 return position;
 202         }
 203
 204         /**
 205          * Sets the current tick position of the sequencer.
 206          * @param ticks         the tick position
 207          */
 208         public static void setPosition(long ticks) {
 209                 position = ticks;
 210         }
 211
 212         /**
 213          * Returns true if the current sequence has been edited.
 214          * @return the tick position
 215          */
 216         public static boolean isEdited() {
 217                 return isEdited;
 218         }
 219
 220         /**
 221          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 222          */
 223         public static void setEdited() {
 224                 isEdited = true;
 225         }
 226
 227         /**
 228          * Rewinds the current sequence the given number of measures.
 229          * @param measures      the number of measures to rewind
 230          */
 231         public static void rewind(long ticks) {
 232                 setPosition(position - ticks);
 233         }
 234
 235         /**
 236          * Fast forwards the current sequence the given number of measures.
 237          * @param measures      the number of measures to fast forward
 238          */
 239         public static void forward(long ticks) {
 240                 setPosition(position + ticks);
 241         }
 242
 243         /**
 244          * Loads the MooSequence in the given file.
 245          * @param filename      the filename to use
 246          */
 247         public static boolean load(String file) {
 248                 // Loads sequence from file
 249                 filename = file;
 250                 try {
 251                         seq = MidiSystem.getSequence(new File(filename));
 252                 } catch (InvalidMidiDataException e) {
 253                         return false;
 254                 } catch (IOException e) {
 255                         return false;
 256                 }
 257                 isEdited = false;
 258
 259                 // Searches the sequence for NoteOn events
 260                 Track[] tracks = seq.getTracks();
 261                 MidiEvent noteOn, noteOff = null, nextEvent;
 262                 MidiMessage nextMsg;
 263                 ShortMessage shortMsg;
 264                 for (int i = 0; i < tracks.length; i++) {
 265         /*
 266                         Collections.sort(track[i].events, new Comparator() {
 267                                 public int compare(Object o1, Object o2) {
 268                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 269                                 }
 270                         });
 271         */
 272                         for (int j = 0; j < tracks[i].size(); j++) {
 273                                 noteOn = tracks[i].get(j);
 274                                 if (noteOn.getMessage() instanceof ShortMessage) {
 275                                         if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
 276                                                 // Finds the corresponding NoteOff event
 277                                                 for (int k = j + 1; k < tracks[i].size(); k++) {
 278                                                         nextEvent = tracks[i].get(k);
 279                                                         nextMsg = nextEvent.getMessage();
 280                                                         if (nextMsg instanceof ShortMessage) {
 281                                                                 shortMsg = (ShortMessage) nextMsg;
 282                                                                 if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 283                                                                         noteOff = nextEvent;
 284                                                                         break;
 285                                                                 }
 286                                                         }
 287                                                 }
 288                                                 // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 289                                                 tracks[i].remove(noteOn);
 290                                                 if (noteOff != null) {
 291                                                         tracks[i].add(new MooNote(noteOn, noteOff));
 292                                                 } else {
 293                                                         tracks[i].add(new MooNote(noteOn));
 294                                                 }
 295                                         }
 296                                 }
 297                         }
 298                 }
 299                 // Sends sequence to GUI and sequencer, then returns
 300                 if (gui != null) gui.setSequence(seq);
 301                 try {
 302                         sequencer.setSequence(seq);
 303                 } catch (InvalidMidiDataException e) {}
 304                 return true;
 305         }
 306
 307         /**
 308          * Saves the current sequence to the given filename
 309          * @param file  the filename to use
 310          */
 311         public static void saveAs(String file) {
 312                 try {
 313                         MidiSystem.write(seq, 1, new File(filename));
 314                 } catch (IOException e) {}
 315                 filename = file;
 316         }
 317
 318         /**
 319          * Saves the current sequence to the previously given filename.
 320          */
 321         public static void save() {
 322                 saveAs(filename);
 323         }
 324
 325         /**
 326          * Releases all reserved devices and exits the program.
 327          */
 328         public static void quit() {
 329                 if (sequencer.isOpen()) sequencer.close();
 330                 if (synthesizer.isOpen()) synthesizer.close();
 331                 System.exit(0);
 332         }
 333 }