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 editPosition;
  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(editPosition);
 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                 gui.update(0);
 180                 sequencer.start();
 181
 182                 // Disables input to volatile components
 183                 // gui.disable();
 184
 185                 // Creates the visualization thread and starts it.
 186                 player = new Thread () {
 187                         public void run() {
 188                                 while(sequencer.isRunning()) gui.update(sequencer.getTickPosition());
 189                                 Moosique.stop();
 190                         }
 191                 };
 192                 player.start();
 193         }
 194
 195         /**
 196          * Stops playback of the current sequence.
 197          */
 198         public static void stop() {
 199                 if (sequencer.isRunning()) {
 200                         sequencer.stop();
 201                         sequencer.setTickPosition(editPosition);
 202                         player.interrupt();
 203                         gui.update((long)0);
 204                 }
 205         }
 206
 207         /**
 208          * Returns the current editing position of the sequencer.
 209          * @return the tick position
 210          */
 211         public static long getPosition() {
 212                 return editPosition;
 213         }
 214
 215         /**
 216          * Sets the current editing position of the sequencer.
 217          * @param ticks         the tick position
 218          */
 219         public static void setPosition(long ticks) {
 220                 editPosition = ticks;
 221         }
 222
 223         /**
 224          * Returns true if the current sequence has been edited.
 225          * @return the tick position
 226          */
 227         public static boolean isEdited() {
 228                 return isEdited;
 229         }
 230
 231         /**
 232          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 233          */
 234         public static void setEdited() {
 235                 isEdited = true;
 236         }
 237
 238         /**
 239          * Rewinds the current sequence the given number of measures.
 240          * @param measures      the number of measures to rewind
 241          */
 242         public static void rewind(long ticks) {
 243                 editPosition -= ticks;
 244         }
 245
 246         /**
 247          * Fast forwards the current sequence the given number of measures.
 248          * @param measures      the number of measures to fast forward
 249          */
 250         public static void forward(long ticks) {
 251                 editPosition += ticks;
 252         }
 253
 254         /**
 255          * Loads the MooSequence in the given file.
 256          * @param filename      the filename to use
 257          */
 258         public static boolean load(String file) {
 259                 // Loads sequence from file
 260                 filename = file;
 261                 try {
 262                         seq = MidiSystem.getSequence(new File(filename));
 263                 } catch (InvalidMidiDataException e) {
 264                         return false;
 265                 } catch (IOException e) {
 266                         return false;
 267                 }
 268                 isEdited = false;
 269
 270                 // Searches the sequence for NoteOn events
 271                 Track[] tracks = seq.getTracks();
 272                 MidiEvent noteOn, noteOff = null, nextEvent;
 273                 MidiMessage nextMsg;
 274                 ShortMessage shortMsg;
 275                 for (int i = 0; i < tracks.length; i++) {
 276         /*
 277                         Collections.sort(track[i].events, new Comparator() {
 278                                 public int compare(Object o1, Object o2) {
 279                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 280                                 }
 281                         });
 282         */
 283                         for (int j = 0; j < tracks[i].size(); j++) {
 284                                 noteOn = tracks[i].get(j);
 285                                 if (noteOn.getMessage() instanceof ShortMessage) {
 286                                         if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
 287                                                 // Finds the corresponding NoteOff event
 288                                                 for (int k = j + 1; k < tracks[i].size(); k++) {
 289                                                         nextEvent = tracks[i].get(k);
 290                                                         nextMsg = nextEvent.getMessage();
 291                                                         if (nextMsg instanceof ShortMessage) {
 292                                                                 shortMsg = (ShortMessage) nextMsg;
 293                                                                 if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 294                                                                         noteOff = nextEvent;
 295                                                                         break;
 296                                                                 }
 297                                                         }
 298                                                 }
 299                                                 // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 300                                                 tracks[i].remove(noteOn);
 301                                                 if (noteOff != null) {
 302                                                         tracks[i].add(new MooNote(noteOn, noteOff));
 303                                                 } else {
 304                                                         tracks[i].add(new MooNote(noteOn));
 305                                                 }
 306                                         }
 307                                 }
 308                         }
 309                 }
 310                 // Sends sequence to GUI and sequencer, then returns
 311                 if (gui != null) gui.setSequence(seq);
 312                 try {
 313                         sequencer.setSequence(seq);
 314                 } catch (InvalidMidiDataException e) {}
 315                 return true;
 316         }
 317
 318         /**
 319          * Saves the current sequence to the given filename
 320          * @param file  the filename to use
 321          */
 322         public static void saveAs(String file) {
 323                 try {
 324                         MidiSystem.write(seq, 1, new File(filename));
 325                 } catch (IOException e) {}
 326                 filename = file;
 327         }
 328
 329         /**
 330          * Saves the current sequence to the previously given filename.
 331          */
 332         public static void save() {
 333                 saveAs(filename);
 334         }
 335
 336         /**
 337          * Releases all reserved devices and exits the program.
 338          */
 339         public static void quit() {
 340                 if (sequencer.isOpen()) sequencer.close();
 341                 if (synthesizer.isOpen()) synthesizer.close();
 342                 System.exit(0);
 343         }
 344 }