Moosique.java

   1 import javax.sound.midi.*;
   2 import javax.swing.*;
   3 import java.io.*;
   4
   5 /*
   6  * Moosique - The MIDI Tracker
   7  *
   8  * Main class that handles initiation, IO and sound FX.
   9  *
  10  * @author  Andersson, Andreen, Lanneskog, Pehrson
  11  * @version 1
  12  */
  13
  14 public class Moosique {
  15
  16         private static MooGUI gui;
  17         private static Sequence seq;
  18
  19         private static Sequencer sequencer = null;
  20         private static Synthesizer synthesizer = null;
  21         private static MidiChannel[] channels;
  22
  23         private static String filename;
  24         private static long position;
  25
  26         /*
  27          * Starts the application.
  28          */
  29         public static void main (String[] args) {
  30                 System.out.println("Moosique version 1.0");
  31                 // Acquires MIDI devices and connects them.
  32                 try {
  33                         sequencer = MidiSystem.getSequencer();
  34                         sequencer.open();
  35                         synthesizer = MidiSystem.getSynthesizer();
  36                         synthesizer.open();
  37                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  38                 } catch (MidiUnavailableException e) {
  39                         System.out.println("Unable to initialize MIDI devices.");
  40                         quit();
  41                 }
  42
  43                 //If a filename is given as the command-line argument, attempts to load a sequence from the file.
  44                 if (args.length == 1) {
  45                         if (!load(args[0])) createSequence();
  46                 } else {
  47                         // Otherwise creates a new empty one.
  48                         createSequence();
  49                 }
  50
  51                 // Sets up channels and GUI.
  52                 channels = synthesizer.getChannels();
  53                 gui = new MooGUI(seq);
  54         }
  55
  56         /*
  57          * Returns a pointer to the current sequence.
  58          * @return the current sequence
  59          */
  60         public static Sequence getSequence() {
  61                 return seq;
  62         }
  63
  64         /*
  65          * Returns a pointer to the current sequence.
  66          * @return the current sequence
  67          */
  68         public static void createSequence() {
  69                 try {
  70                         seq = new Sequence(Sequence.PPQ, 96);
  71                 } catch (InvalidMidiDataException e) {}
  72         }
  73
  74         /*
  75          * Starts playback of the current sequence.
  76          */
  77         public static void play() {
  78                 try {
  79                         sequencer.setSequence(seq);
  80                         sequencer.setTickPosition(position);
  81                 } catch (InvalidMidiDataException e) {}
  82                 sequencer.start();
  83         }
  84
  85         /*
  86          * Pauses playback of the current sequence.
  87          */
  88         public static void pause() {
  89                 sequencer.stop();
  90         }
  91
  92         /*
  93          * Resumes playback of the current sequence.
  94          */
  95         public static void resume() {
  96                 sequencer.start();
  97         }
  98
  99         /*
 100          * Stops playback of the current sequence.
 101          */
 102         public static void stop() {
 103                 sequencer.stop();
 104                 sequencer.setTickPosition(position);
 105         }
 106
 107         /*
 108          * Rewinds the current sequence the given number of measures.
 109          * @param measures      the number of measures to rewind
 110          */
 111         public static long getPosition() {
 112                 return position;
 113         }
 114
 115         /*
 116          * Rewinds the current sequence the given number of measures.
 117          * @param measures      the number of measures to rewind
 118          */
 119         public static void setPosition(long ticks) {
 120                 position = ticks;
 121         }
 122
 123         /*
 124          * Rewinds the current sequence the given number of measures.
 125          * @param measures      the number of measures to rewind
 126          */
 127         public static void rewind(long ticks) {
 128                 position -= ticks;
 129         }
 130
 131         /*
 132          * Fast forwards the current sequence the given number of measures.
 133          * @param measures      the number of measures to fast forward
 134          */
 135         public static void forward(long ticks) {
 136                 position += ticks;
 137         }
 138
 139         /*
 140          * Loads the MooSequence in the given file.
 141          * @param filename      the filename to use
 142          */
 143         public static boolean load(String file) {
 144                 // Loads sequence from file
 145                 filename = file;
 146                 try {
 147                         seq = MidiSystem.getSequence(new File(filename));
 148                 } catch (InvalidMidiDataException e) {
 149                         return false;
 150                 } catch (IOException e) {
 151                         JOptionPane.showMessageDialog(null, "File", "alert", JOptionPane.ERROR_MESSAGE);
 152                         return false;
 153                 }
 154
 155                 // Sends sequence to GUI
 156                 gui.setSequence(seq);
 157
 158                 // Searches the sequence for NoteOn events
 159                 Track[] tracks = seq.getTracks();
 160                 MidiEvent noteOn, noteOff = null, nextEvent;
 161                 MidiMessage nextMsg;
 162                 ShortMessage shortMsg;
 163                 for (int i = 0; i < tracks.length; i++) {
 164                         for (int j = 0; j < tracks[i].size(); j++) {
 165                                 noteOn = tracks[i].get(j);
 166                                 if (noteOn.getMessage() instanceof ShortMessage) {
 167                                         if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
 168                                                 // Finds the corresponding NoteOff event
 169                                                 for (int k = j + 1; k < tracks[i].size(); k++) {
 170                                                         nextEvent = tracks[i].get(k);
 171                                                         nextMsg = nextEvent.getMessage();
 172                                                         if (nextMsg instanceof ShortMessage) {
 173                                                                 shortMsg = (ShortMessage) nextMsg;
 174                                                                 if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 175                                                                         noteOff = nextEvent;
 176                                                                         break;
 177                                                                 }
 178                                                         }
 179                                                 }
 180                                                 // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 181                                                 tracks[i].remove(noteOn);
 182                                                 if (noteOff != null) {
 183                                                         tracks[i].add(new MooNote(noteOn, noteOff));
 184                                                 } else {
 185                                                         tracks[i].add(new MooNote(noteOn));
 186                                                 }
 187                                         }
 188                                 }
 189                         }
 190                 }
 191                 return true;
 192         }
 193
 194         /*
 195          * Saves the current sequence to the given filename
 196          * @param filename      the filename to use
 197          */
 198         public static void saveAs(String filename) throws IOException {
 199                 MidiSystem.write(seq, 1, new File(filename));
 200
 201         }
 202
 203         /*
 204          * Saves the current sequence to the previously given filename.
 205          */
 206         public static void save() throws IOException {
 207                 saveAs(filename);
 208         }
 209
 210         /*
 211          * Releases all reserved devices and exits the program.
 212          */
 213         public static void quit() {
 214                 if (sequencer.isOpen()) {
 215                         try {
 216                                 sequencer.open();
 217                         } catch (MidiUnavailableException e) {}
 218                 }
 219                 System.exit(0);
 220         }
 221 }