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;
  26
  27         /**
  28          * Starts the application.
  29          */
  30         public static void main (String[] args) {
  31                 System.out.println("\nMoosique version 1.0\n");
  32
  33                 // Parses command-line arguments.
  34                 for (int i = 0; i < args.length; i++) {
  35                         if (args[i].equals("-n")) {makeGUI = false;}
  36                         else if (fileArg == null) {fileArg = args[i];}
  37                 }
  38
  39                 // Acquires MIDI devices and connects them.
  40                 System.out.print("Initializing MIDI devices.");
  41                 try {
  42                         sequencer = MidiSystem.getSequencer();
  43                         System.out.print(".");
  44                         sequencer.open();
  45                         synthesizer = MidiSystem.getSynthesizer();
  46                         System.out.print(".");
  47                         synthesizer.open();
  48                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  49                         channels = synthesizer.getChannels();
  50                         setActiveChannel(0);
  51                 } catch (MidiUnavailableException e) {
  52                         System.out.println("Failed, quitting.");
  53 //                      System.exit(1);
  54                 }
  55                 System.out.println("Done");
  56
  57                 //If a filename is given as the command-line argument, attempts to load a sequence from the file.
  58                 if (fileArg != null) {
  59                         System.out.print("Loading MIDI sequence from " + fileArg + "...");
  60                         if (!load(fileArg)) {
  61                                 System.out.println("Failed");
  62                                 clearSequence();
  63                         } else {
  64                                 System.out.println("Done");
  65                         }
  66                 } else {
  67                         // Otherwise creates a new empty one.
  68                         clearSequence();
  69                 }
  70
  71                 // Builds GUI, unless n-flag is set.
  72                 if (makeGUI) {
  73                         System.out.print("Building GUI...");
  74                         try {
  75                                 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  76                         } catch (Exception e) {}
  77                         gui = new MooGUI(seq);
  78                         System.out.println("Done");
  79                 } else {
  80                         System.out.print("Playing...");
  81                         play();
  82                         while (sequencer.isRunning()) {}
  83                         System.out.println("Done");
  84                         quit();
  85                 }
  86         }
  87
  88         /**
  89          * Returns the GUI.
  90          * @return the GUI
  91          */
  92         public static MooGUI getGUI() {
  93                 return gui;
  94         }
  95
  96         /**
  97          * Returns the current sequence.
  98          * @return the current sequence
  99          */
 100         public static Sequence getSequence() {
 101                 return seq;
 102         }
 103
 104         /**
 105          * Returns the current sequencer.
 106          * @return the current sequencer
 107          */
 108         public static Sequencer getSequencer() {
 109                 return sequencer;
 110         }
 111
 112         /**
 113          * Returns the MidiChannels of the selected synthesizer.
 114          * @return the available MidiChannels
 115          */
 116         public static MidiChannel[] getChannels() {
 117                 return channels;
 118         }
 119
 120         /**
 121          * Returns the currently active MidiChannel.
 122          * @return the active MidiChannel
 123          */
 124         public static MidiChannel getActiveChannel() {
 125                 return activeChannel;
 126         }
 127
 128         /**
 129          * Sets the currently active MidiChannel.
 130          * @param channel       the number of the MidiChannel to activate
 131          */
 132         public static void setActiveChannel(int channel) {
 133                 activeChannel = channels[channel];
 134         }
 135
 136         /**
 137          * Replaces the current sequence with a new one, holding three empty tracks.
 138          */
 139         public static void clearSequence() {
 140                 // Creates a new sequence and sends it to the sequencer.
 141                 try {
 142                         seq = new Sequence(Sequence.PPQ, 96, 3);
 143                         sequencer.setSequence(seq);
 144                 } catch (InvalidMidiDataException e) {}
 145                 // Sends sequence to GUI.
 146                 if (gui != null) gui.setSequence(seq);
 147         }
 148
 149         /**
 150          * Starts playback of the current sequence.
 151          */
 152         public static void play() {
 153                 sequencer.setTickPosition(position);
 154                 sequencer.start();
 155         }
 156
 157         /**
 158          * Pauses playback of the current sequence.
 159          */
 160         public static void pause() {
 161                 sequencer.stop();
 162         }
 163
 164         /**
 165          * Resumes playback of the current sequence.
 166          */
 167         public static void resume() {
 168                 sequencer.start();
 169         }
 170
 171         /**
 172          * Stops playback of the current sequence.
 173          */
 174         public static void stop() {
 175                 sequencer.stop();
 176                 sequencer.setTickPosition(position);
 177         }
 178
 179         /**
 180          * Rewinds the current sequence the given number of measures.
 181          * @param measures      the number of measures to rewind
 182          */
 183         public static long getPosition() {
 184                 return position;
 185         }
 186
 187         /**
 188          * Rewinds the current sequence the given number of measures.
 189          * @param measures      the number of measures to rewind
 190          */
 191         public static void setPosition(long ticks) {
 192                 position = ticks;
 193         }
 194
 195         /**
 196          * Rewinds the current sequence the given number of measures.
 197          * @param measures      the number of measures to rewind
 198          */
 199         public static void rewind(long ticks) {
 200                 setPosition(position - ticks);
 201         }
 202
 203         /**
 204          * Fast forwards the current sequence the given number of measures.
 205          * @param measures      the number of measures to fast forward
 206          */
 207         public static void forward(long ticks) {
 208                 setPosition(position + ticks);
 209         }
 210
 211         /**
 212          * Loads the MooSequence in the given file.
 213          * @param filename      the filename to use
 214          */
 215         public static boolean load(String file) {
 216                 // Loads sequence from file
 217                 filename = file;
 218                 try {
 219                         seq = MidiSystem.getSequence(new File(filename));
 220                 } catch (InvalidMidiDataException e) {
 221                         return false;
 222                 } catch (IOException e) {
 223                         return false;
 224                 }
 225
 226                 // Sends sequence to GUI and sequencer
 227                 if (gui != null) gui.setSequence(seq);
 228                 try {
 229                         sequencer.setSequence(seq);
 230                 } catch (InvalidMidiDataException e) {}
 231
 232                 // Searches the sequence for NoteOn events
 233                 Track[] tracks = seq.getTracks();
 234                 MidiEvent noteOn, noteOff = null, nextEvent;
 235                 MidiMessage nextMsg;
 236                 ShortMessage shortMsg;
 237                 for (int i = 0; i < tracks.length; i++) {
 238         /*
 239                         Collections.sort(track[i].events, new Comparator() {
 240                                 public int compare(Object o1, Object o2) {
 241                                         return ((MidiEvent)o2).getTick() - ((MidiEvent)o1).getTick();
 242                                 }
 243                         });
 244         */
 245                         for (int j = 0; j < tracks[i].size(); j++) {
 246                                 noteOn = tracks[i].get(j);
 247                                 if (noteOn.getMessage() instanceof ShortMessage) {
 248                                         if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
 249                                                 // Finds the corresponding NoteOff event
 250                                                 for (int k = j + 1; k < tracks[i].size(); k++) {
 251                                                         nextEvent = tracks[i].get(k);
 252                                                         nextMsg = nextEvent.getMessage();
 253                                                         if (nextMsg instanceof ShortMessage) {
 254                                                                 shortMsg = (ShortMessage) nextMsg;
 255                                                                 if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 256                                                                         noteOff = nextEvent;
 257                                                                         break;
 258                                                                 }
 259                                                         }
 260                                                 }
 261                                                 // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 262                                                 tracks[i].remove(noteOn);
 263                                                 if (noteOff != null) {
 264                                                         tracks[i].add(new MooNote(noteOn, noteOff));
 265                                                 } else {
 266                                                         tracks[i].add(new MooNote(noteOn));
 267                                                 }
 268                                         }
 269                                 }
 270                         }
 271                 }
 272                 return true;
 273         }
 274
 275         /**
 276          * Saves the current sequence to the given filename
 277          * @param file  the filename to use
 278          */
 279         public static void saveAs(String file) {
 280                 try {
 281                         MidiSystem.write(seq, 1, new File(filename));
 282                 } catch (IOException e) {}
 283                 filename = file;
 284         }
 285
 286         /**
 287          * Saves the current sequence to the previously given filename.
 288          */
 289         public static void save() {
 290                 saveAs(filename);
 291         }
 292
 293         /**
 294          * Releases all reserved devices and exits the program.
 295          */
 296         public static void quit() {
 297                 if (sequencer.isOpen()) sequencer.close();
 298                 if (synthesizer.isOpen()) synthesizer.close();
 299                 System.exit(0);
 300         }
 301 }