MidiAudio.java 文件源码

MidiAudio(InputStream data) throws MidiUnavailableException {
    getSequencer();
    setSequence(data);
    sequencer.addMetaEventListener(new MetaEventListener() {
        public void meta(MetaMessage msg) {
            if (msg.getType() == 47) {
                try {
                    sequencer.setSequence(sequence);
                } catch (InvalidMidiDataException e) {
                    ErrorHandler.alert(e);
                }
                sequencer.setTickPosition(0);
                if (loop) { // End of track                        
                    sequencer.start();
                }
            }
        }
    });

    AudioFormat base = new AudioFormat(44100, 16, 2, true, false);
    format = new AudioFileFormat(new Type("MIDI", "mid"), base, (int) (base.getFrameRate() * (sequence.getMicrosecondLength() / 1000000 + 4))).getFormat();
}