JVSTSynthMidiDeviceTest.java 文件源码

@Test
public void testOpenMidiDevice() throws Exception
{
    FrinikaJVSTSynth synth = (FrinikaJVSTSynth) MidiSystem.getMidiDevice(new FrinikaJVSTSynthProvider.FrinikaJVSTSynthProviderInfo());
    final TargetDataLine line = (TargetDataLine)((Mixer)synth).getLine( new Line.Info(TargetDataLine.class));
    AudioFormat.Encoding PCM_FLOAT = new AudioFormat.Encoding("PCM_FLOAT");
    AudioFormat format = new AudioFormat(PCM_FLOAT, 44100, 32, 2, 4*2, 44100, ByteOrder.nativeOrder().equals(ByteOrder.BIG_ENDIAN));
    line.open(format);

    AudioInputStream ais = new AudioInputStream(line);
    assertTrue(AudioSystem.isConversionSupported(Encoding.PCM_SIGNED, ais.getFormat()));

    AudioInputStream convertedAis = AudioSystem.getAudioInputStream(Encoding.PCM_SIGNED, ais);
    SourceDataLine sdl = AudioSystem.getSourceDataLine(convertedAis.getFormat());
    sdl.open();
    sdl.start();
    byte[] buf = new byte[16384];        
    ShortMessage shm = new ShortMessage();
    shm.setMessage(ShortMessage.NOTE_ON, 1, 40, 127);
    synth.getReceiver().send(shm,-1);
    for(int n=0;n<20;n++)
    {
        int read = convertedAis.read(buf);            
        sdl.write(buf, 0, read);
    }        
}