/** Checks the input lines of the mixer and removes the ones that aren't needed anymore */
private static void serviceMixer(AudioMixer mixer) {
List<AudioInput> ais = mixer.getAudioStreams();
for (int i = ais.size() - 1; i >= 0; i--) {
AudioInput ai = ais.get(i);
if (ai.done()) {
mixer.removeAudioStream(ai);
}
}
}
public static void main(String[] args) throws Exception {
int midiDev = -1;
int audioDev = -1;
int latencyInMillis = 70;
// parse arguments
int argi = 0;
while (argi < args.length) {
String arg = args[argi];
if (arg.equals("-h")) {
printUsageAndExit();
} else if (arg.equals("-m")) {
argi++;
if (argi >= args.length) {
printUsageAndExit();
}
midiDev = Integer.parseInt(args[argi]);
} else if (arg.equals("-a")) {
argi++;
if (argi >= args.length) {
printUsageAndExit();
}
audioDev = Integer.parseInt(args[argi]);
} else if (arg.equals("-l")) {
argi++;
if (argi >= args.length) {
printUsageAndExit();
}
latencyInMillis = Integer.parseInt(args[argi]);
} else {
printUsageAndExit();
}
argi++;
}
// load samples
final AudioFileSource[] src = new AudioFileSource[sounds.length];
for (int i = 0; i < sounds.length; i++) {
src[i] = new AudioFileSource(new File(sounds[i]));
}
// define the first source's audioformat as the master format
final AudioFormat format = src[0].getFormat();
// set up mixer
final AudioMixer mixer = new AudioMixer(format.getChannels(), format.getSampleRate());
// set up soundcard (sink)
SoundcardSink sink = new SoundcardSink();
// open the sink and connect it with the mixer
sink.open(audioDev, latencyInMillis, format, mixer);
try {
// do we want to open a MIDI port?
MidiIn midi = null;
if (midiDev >= 0) {
// start MIDI IN
midi = new MidiIn();
midi.setListener(
new MidiIn.Listener() {
public void midiInPlayed(int status, int data1, int data2) {
// only react to NOTE ON messages with velocity > 0
if (((status & 0xF0) == 0x90) && (data2 > 0)) {
AudioFileSource newSrc = src[data1 % src.length].makeClone();
mixer.addAudioStream(newSrc);
serviceMixer(mixer);
}
}
public void midiInPlayed(byte[] message) {
// nothing to do for long MIDI messages
}
});
midi.open(midiDev);
} else {
Debug.debug("No MIDI.");
}
try {
// start the sink -- from now on, the mixer is polled for new
// data
sink.start();
System.out.println("Press ENTER for a sound, 'q'+ENTER to quit.");
int currSrc = 0;
while (true) {
char c = (char) System.in.read();
if (c == 'q') {
break;
}
AudioFileSource newSrc = src[(currSrc++) % src.length].makeClone();
mixer.addAudioStream(newSrc);
serviceMixer(mixer);
}
} finally {
// clean-up
if (midi != null) {
midi.close();
}
}
} finally {
sink.close();
}
Debug.debug("done");
}