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                 if (sequencer.isRunning()) {
 172                         sequencer.stop();
 173                 }
 174                 if (player != null) player.interrupt();
 175         }
 176
 177         /**
 178          * Resumes playback of the current sequence.
 179          */
 180         public static void resume() {
 181                 gui.update(0);
 182                 sequencer.start();
 183
 184                 // Disables input to volatile components
 185                 // gui.disable();
 186
 187                 // Creates the visualization thread and starts it.
 188                 player = new Thread () {
 189                         public void run() {
 190                                 while(sequencer.isRunning()) gui.update(sequencer.getTickPosition());
 191                                 Moosique.stop();
 192                         }
 193                 };
 194                 player.start();
 195         }
 196
 197         /**
 198          * Stops playback of the current sequence.
 199          */
 200         public static void stop() {
 201                 if (sequencer.isRunning()) {
 202                         sequencer.stop();
 203                 }
 204                 sequencer.setTickPosition(editPosition);
 205                 if (player != null) player.interrupt();
 206                 gui.update((long)0);
 207         }
 208
 209         /**
 210          * Returns the current editing position of the sequencer.
 211          * @return the tick position
 212          */
 213         public static long getPosition() {
 214                 return editPosition;
 215         }
 216
 217         /**
 218          * Sets the current editing position of the sequencer.
 219          * @param ticks         the tick position
 220          */
 221         public static void setPosition(long ticks) {
 222                 editPosition = ticks;
 223         }
 224
 225         /**
 226          * Returns true if the current sequence has been edited.
 227          * @return the tick position
 228          */
 229         public static boolean isEdited() {
 230                 return isEdited;
 231         }
 232
 233         /**
 234          * Sets the current sequence as edited, which implies prompts when loading a new sequence.
 235          */
 236         public static void setEdited() {
 237                 isEdited = true;
 238         }
 239
 240         /**
 241          * Rewinds the current sequence the given number of measures.
 242          * @param measures      the number of measures to rewind
 243          */
 244         public static void rewind(long ticks) {
 245                 editPosition -= ticks;
 246         }
 247
 248         /**
 249          * Fast forwards the current sequence the given number of measures.
 250          * @param measures      the number of measures to fast forward
 251          */
 252         public static void forward(long ticks) {
 253                 editPosition += ticks;
 254         }
 255
 256         /**
 257          * Loads the MooSequence in the given file.
 258          * @param filename      the filename to use
 259          */
 260         public static boolean load(String file) {
 261                 // Loads sequence from file
 262                 filename = file;
 263                 try {
 264                         seq = MidiSystem.getSequence(new File(filename));
 265                 } catch (InvalidMidiDataException e) {
 266                         return false;
 267                 } catch (IOException e) {
 268                         return false;
 269                 }
 270                 isEdited = false;
 271
 272                 // Searches the sequence for NoteOn events
 273                 Track[] tracks = seq.getTracks();
 274                 MidiEvent noteOn, noteOff = null, nextEvent;
 275                 MidiMessage nextMsg;
 276                 ShortMessage shortMsg;
 277                 ArrayList noteOns, noteOffs;
 278                 for (int i = 0; i < tracks.length; i++) {
 279                          noteOns = new ArrayList(tracks.length);
 280         /*
 281                         Collections.sort(track[i].events, new Comparator() {
 282                                 public int compare(Object o1, Object o2) {
 283                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 284                                 }
 285                         });
 286         */
 287                         for (int j = 0; j < tracks[i].size(); j++) {
 288                                 noteOn = tracks[i].get(j);
 289                                 if (noteOn.getMessage().getStatus() == ShortMessage.NOTE_ON) {
 290                                         // Finds the corresponding NoteOff event
 291                                         for (int k = j + 1; k < tracks[i].size(); k++) {
 292                                                 nextEvent = tracks[i].get(k);
 293                                                 nextMsg = nextEvent.getMessage();
 294                                                 if (nextMsg instanceof ShortMessage) {
 295                                                         shortMsg = (ShortMessage) nextMsg;
 296                                                         if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 297                                                                 noteOff = nextEvent;
 298                                                                 break;
 299                                                         }
 300                                                 }
 301                                         }
 302                                         // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 303                                         tracks[i].remove(noteOn);
 304                                         if (noteOff != null) {
 305                                                 tracks[i].add(new MooNote(noteOn, noteOff));
 306                                         } else {
 307                                                 tracks[i].add(new MooNote(noteOn));
 308                                         }
 309                                 }
 310                         }
 311                 }
 312                 // Sends sequence to GUI and sequencer, then returns
 313                 if (gui != null) gui.setSequence(seq);
 314                 try {
 315                         sequencer.setSequence(seq);
 316                 } catch (InvalidMidiDataException e) {}
 317                 return true;
 318         }
 319
 320         /**
 321          * Saves the current sequence to the given filename
 322          * @param file  the filename to use
 323          */
 324         public static void saveAs(String file) {
 325                 try {
 326                         MidiSystem.write(seq, 1, new File(filename));
 327                 } catch (IOException e) {}
 328                 filename = file;
 329         }
 330
 331         /**
 332          * Saves the current sequence to the previously given filename.
 333          */
 334         public static void save() {
 335                 saveAs(filename);
 336         }
 337
 338         /**
 339          * Releases all reserved devices and exits the program.
 340          */
 341         public static void quit() {
 342                 if (sequencer.isOpen()) sequencer.close();
 343                 if (synthesizer.isOpen()) synthesizer.close();
 344                 System.exit(0);
 345         }
 346 }