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("\nMoosique version 1.0\n");
  31                 // Acquires MIDI devices and connects them.
  32                 System.out.print("Initializing MIDI devices.");
  33                 try {
  34                         sequencer = MidiSystem.getSequencer();
  35                         System.out.print(".");
  36                         sequencer.open();
  37                         System.out.print(".");
  38                         synthesizer = MidiSystem.getSynthesizer();
  39                         System.out.print(".");
  40                         synthesizer.open();
  41                         System.out.print(".");
  42                         sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());
  43                 } catch (MidiUnavailableException e) {
  44                         System.out.println("Failed, quitting.");
  45                         quit();
  46                 }
  47                 System.out.println("Done");
  48
  49                 //If a filename is given as the command-line argument, attempts to load a sequence from the file.
  50                 System.out.print("Loading MIDI sequence...");
  51                 if (args.length == 1) {
  52                         if (!load(args[0])) clearSequence();
  53                 } else {
  54                         // Otherwise creates a new empty one.
  55                         clearSequence();
  56                 }
  57                 System.out.println("Done");
  58
  59                 // Sets up channels and GUI.
  60                 System.out.print("Creating GUI...");
  61                 channels = synthesizer.getChannels();
  62                 gui = new MooGUI(seq);
  63                 System.out.println("Done");
  64         }
  65
  66         /*
  67          * Returns a pointer to the current sequence.
  68          * @return the current sequence
  69          */
  70         public static Sequence getSequence() {
  71                 return seq;
  72         }
  73
  74         /*
  75          * Returns a pointer to the current sequence.
  76          * @return the current sequence
  77          */
  78         public static void clearSequence() {
  79                 // Creates sequence.
  80                 try {
  81                         seq = new Sequence(Sequence.PPQ, 96);
  82                 } catch (InvalidMidiDataException e) {}
  83                 // Sends sequence to GUI.
  84                 if (gui != null) gui.setSequence(seq);
  85
  86         }
  87
  88         /*
  89          * Starts playback of the current sequence.
  90          */
  91         public static void play() {
  92                 try {
  93                         sequencer.setSequence(seq);
  94                         sequencer.setTickPosition(position);
  95                 } catch (InvalidMidiDataException e) {}
  96                 sequencer.start();
  97         }
  98
  99         /*
 100          * Pauses playback of the current sequence.
 101          */
 102         public static void pause() {
 103                 sequencer.stop();
 104         }
 105
 106         /*
 107          * Resumes playback of the current sequence.
 108          */
 109         public static void resume() {
 110                 sequencer.start();
 111         }
 112
 113         /*
 114          * Stops playback of the current sequence.
 115          */
 116         public static void stop() {
 117                 sequencer.stop();
 118                 sequencer.setTickPosition(position);
 119         }
 120
 121         /*
 122          * Rewinds the current sequence the given number of measures.
 123          * @param measures      the number of measures to rewind
 124          */
 125         public static long getPosition() {
 126                 return position;
 127         }
 128
 129         /*
 130          * Rewinds the current sequence the given number of measures.
 131          * @param measures      the number of measures to rewind
 132          */
 133         public static void setPosition(long ticks) {
 134                 position = ticks;
 135         }
 136
 137         /*
 138          * Rewinds the current sequence the given number of measures.
 139          * @param measures      the number of measures to rewind
 140          */
 141         public static void rewind(long ticks) {
 142                 position -= ticks;
 143         }
 144
 145         /*
 146          * Fast forwards the current sequence the given number of measures.
 147          * @param measures      the number of measures to fast forward
 148          */
 149         public static void forward(long ticks) {
 150                 position += ticks;
 151         }
 152
 153         /*
 154          * Loads the MooSequence in the given file.
 155          * @param filename      the filename to use
 156          */
 157         public static boolean load(String file) {
 158                 // Loads sequence from file
 159                 filename = file;
 160                 try {
 161                         seq = MidiSystem.getSequence(new File(filename));
 162                 } catch (InvalidMidiDataException e) {
 163                         return false;
 164                 } catch (IOException e) {
 165                         JOptionPane.showMessageDialog(null, "File", "alert", JOptionPane.ERROR_MESSAGE);
 166                         return false;
 167                 }
 168
 169                 // Sends sequence to GUI
 170                 if (gui != null) gui.setSequence(seq);
 171
 172                 // Searches the sequence for NoteOn events
 173                 Track[] tracks = seq.getTracks();
 174                 MidiEvent noteOn, noteOff = null, nextEvent;
 175                 MidiMessage nextMsg;
 176                 ShortMessage shortMsg;
 177                 for (int i = 0; i < tracks.length; i++) {
 178                         for (int j = 0; j < tracks[i].size(); j++) {
 179                                 noteOn = tracks[i].get(j);
 180                                 if (noteOn.getMessage() instanceof ShortMessage) {
 181                                         if (((ShortMessage)noteOn.getMessage()).getCommand() == ShortMessage.NOTE_ON) {
 182                                                 // Finds the corresponding NoteOff event
 183                                                 for (int k = j + 1; k < tracks[i].size(); k++) {
 184                                                         nextEvent = tracks[i].get(k);
 185                                                         nextMsg = nextEvent.getMessage();
 186                                                         if (nextMsg instanceof ShortMessage) {
 187                                                                 shortMsg = (ShortMessage) nextMsg;
 188                                                                 if (shortMsg.getCommand() == ShortMessage.NOTE_OFF && shortMsg.getChannel() == ((ShortMessage)noteOn.getMessage()).getChannel() && shortMsg.getData1() == ((ShortMessage)noteOn.getMessage()).getData1()) {
 189                                                                         noteOff = nextEvent;
 190                                                                         break;
 191                                                                 }
 192                                                         }
 193                                                 }
 194                                                 // Replaces the NoteOn event with a MooNote, if possible with the corresponding NoteOff event
 195                                                 tracks[i].remove(noteOn);
 196                                                 if (noteOff != null) {
 197                                                         tracks[i].add(new MooNote(noteOn, noteOff));
 198                                                 } else {
 199                                                         tracks[i].add(new MooNote(noteOn));
 200                                                 }
 201                                         }
 202                                 }
 203                         }
 204                 }
 205                 return true;
 206         }
 207
 208         /*
 209          * Saves the current sequence to the given filename
 210          * @param filename      the filename to use
 211          */
 212         public static void saveAs(String filename) throws IOException {
 213                 MidiSystem.write(seq, 1, new File(filename));
 214
 215         }
 216
 217         /*
 218          * Saves the current sequence to the previously given filename.
 219          */
 220         public static void save() throws IOException {
 221                 saveAs(filename);
 222         }
 223
 224         /*
 225          * Releases all reserved devices and exits the program.
 226          */
 227         public static void quit() {
 228                 if (sequencer.isOpen()) {
 229                         try {
 230                                 sequencer.open();
 231                         } catch (MidiUnavailableException e) {}
 232                 }
 233                 System.exit(0);
 234         }
 235 }