/** Open an audio channel. */
public synchronized void openChannel(InputStream in) {
if (DEBUG) {
System.out.println("AudioDevice: openChannel");
System.out.println("input stream =" + in);
}
Info info = null;
// is this already playing? if so, then just return
for (int i = 0; i < infos.size(); i++) {
info = (AudioDevice.Info) infos.elementAt(i);
if (info.in == in) {
return;
}
}
AudioInputStream as = null;
if (in instanceof AudioStream) {
if (((AudioStream) in).midiformat != null) {
// it's a midi file
try {
startMidi(((AudioStream) in).stream, in);
} catch (Exception e) {
return;
}
} else if (((AudioStream) in).ais != null) {
// it's sampled audio
try {
startSampled(((AudioStream) in).ais, in);
} catch (Exception e) {
return;
}
}
} else if (in instanceof AudioDataStream) {
if (in instanceof ContinuousAudioDataStream) {
try {
AudioInputStream ais =
new AudioInputStream(
in, ((AudioDataStream) in).getAudioData().format, AudioSystem.NOT_SPECIFIED);
startSampled(ais, in);
} catch (Exception e) {
return;
}
} else {
try {
AudioInputStream ais =
new AudioInputStream(
in,
((AudioDataStream) in).getAudioData().format,
((AudioDataStream) in).getAudioData().buffer.length);
startSampled(ais, in);
} catch (Exception e) {
return;
}
}
} else {
BufferedInputStream bis = new BufferedInputStream(in, 1024);
try {
try {
as = AudioSystem.getAudioInputStream(bis);
} catch (IOException ioe) {
return;
}
startSampled(as, in);
} catch (UnsupportedAudioFileException e) {
try {
try {
MidiFileFormat mff = MidiSystem.getMidiFileFormat(bis);
} catch (IOException ioe1) {
return;
}
startMidi(bis, in);
} catch (InvalidMidiDataException e1) {
// $$jb:08.01.99: adding this section to make some of our other
// legacy classes work.....
// not MIDI either, special case handling for all others
AudioFormat defformat =
new AudioFormat(AudioFormat.Encoding.ULAW, 8000, 8, 1, 1, 8000, true);
try {
AudioInputStream defaif =
new AudioInputStream(bis, defformat, AudioSystem.NOT_SPECIFIED);
startSampled(defaif, in);
} catch (UnsupportedAudioFileException es) {
return;
} catch (LineUnavailableException es2) {
return;
}
} catch (MidiUnavailableException e2) {
// could not open sequence
return;
}
} catch (LineUnavailableException e) {
return;
}
}
// don't forget adjust for a new stream.
notify();
}
/**
* Parses a MIDI file and returns a Pattern. This is an excellent example of JFugue's
* Parser-Renderer architecture:
*
* <pre>
* MidiParser parser = new MidiParser();
* MusicStringRenderer renderer = new MusicStringRenderer();
* parser.addParserListener(renderer);
* parser.parse(sequence);
* </pre>
*
* @param filename The name of the MIDI file
* @return a Pattern containing the MusicString representing the MIDI music
* @throws IOException If there is a problem opening the MIDI file
* @throws InvalidMidiDataException If there is a problem obtaining MIDI resources
*/
public Pattern loadMidi(File file) throws IOException, InvalidMidiDataException {
MidiFileFormat format = MidiSystem.getMidiFileFormat(file);
this.sequenceTiming = format.getDivisionType();
this.resolution = format.getResolution();
return Pattern.loadMidi(file);
}