Java AudioSynthesizer.getReceiver方法代码示例

import com.sun.media.sound.AudioSynthesizer; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
    AudioSynthesizer synth = new SoftSynthesizer();
    Receiver recv = synth.getReceiver();
    assertTrue(recv != null);
    ShortMessage sm = new ShortMessage();
    sm.setMessage(ShortMessage.NOTE_OFF, 0, 64, 64);
    synth.open(new DummySourceDataLine(), null);
    recv.send(sm, -1);
    synth.close();
    try
    {
        recv.send(sm, -1);
        throw new RuntimeException("Exception not thrown!");
    }
    catch(Exception e)
    {
        // Just checking if exception is thrown
    }
}
 

import com.sun.media.sound.AudioSynthesizer; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {

        AudioSynthesizer synth = new SoftSynthesizer();
        synth.openStream(null, null);
        Receiver recv = synth.getReceiver();
        if (((SoftReceiver) recv).getMidiDevice() != synth) {
            throw new Exception("SoftReceiver.getMidiDevice() doesn't return "
                    + "instance of the synthesizer");
        }
        synth.close();
    }
 

import com.sun.media.sound.AudioSynthesizer; //导入方法依赖的package包/类
public static void test(Soundbank soundbank) throws Exception {

        // Create instance of synthesizer using the testing soundbank above
        AudioSynthesizer synth = new SoftSynthesizer();
        AudioInputStream stream = synth.openStream(format, null);
        synth.unloadAllInstruments(synth.getDefaultSoundbank());
        synth.loadAllInstruments(soundbank);
        Receiver recv = synth.getReceiver();

        // Set volume to max and turn reverb off
        ShortMessage reverb_off = new ShortMessage();
        reverb_off.setMessage(ShortMessage.CONTROL_CHANGE, 91, 0);
        recv.send(reverb_off, -1);
        ShortMessage full_volume = new ShortMessage();
        full_volume.setMessage(ShortMessage.CONTROL_CHANGE, 7, 127);
        recv.send(full_volume, -1);

        Random random = new Random(3485934583945l);

        // Create random timestamps
        long[] test_timestamps = new long[30];
        for (int i = 1; i < test_timestamps.length; i++) {
            test_timestamps[i] = i * 44100
                    + (int) (random.nextDouble() * 22050.0);
        }

        // Send midi note on message to synthesizer
        for (int i = 0; i < test_timestamps.length; i++) {
            ShortMessage midi_on = new ShortMessage();
            midi_on.setMessage(ShortMessage.NOTE_ON, 69, 127);
            recv.send(midi_on,
                    (long) ((test_timestamps[i] / 44100.0) * 1000000.0));
        }

        // Measure timing from rendered audio
        float[] fbuffer = new float[100];
        byte[] buffer = new byte[fbuffer.length * format.getFrameSize()];
        long firsts = -1;
        int counter = 0;
        long s = 0;
        long max_jitter = 0;
        outerloop: for (int k = 0; k < 10000000; k++) {
            stream.read(buffer);
            AudioFloatConverter.getConverter(format).toFloatArray(buffer,
                    fbuffer);
            for (int i = 0; i < fbuffer.length; i++) {
                if (fbuffer[i] != 0) {
                    if (firsts == -1)
                        firsts = s;

                    long measure_time = (s - firsts);
                    long predicted_time = test_timestamps[counter];

                    long jitter = Math.abs(measure_time - predicted_time);

                    if (jitter > 10)
                        max_jitter = jitter;

                    counter++;
                    if (counter == test_timestamps.length)
                        break outerloop;
                }
                s++;
            }
        }
        synth.close();

        if (counter == 0)
            throw new Exception("Nothing was measured!");

        if (max_jitter != 0) {
            throw new Exception("Jitter has occurred! "
                    + "(max jitter = " + max_jitter + ")");
        }

    }
 

import com.sun.media.sound.AudioSynthesizer; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception
{
	/*
	* Open synthesizer in pull mode in the format 96000hz 24 bit stereo
	* using Sinc interpolation for highest quality.
	* With 1024 in max polyphony.
	*/
	AudioFormat format = new AudioFormat(96000, 24, 2, true, false);
	AudioSynthesizer synthesizer = (AudioSynthesizer)MidiSystem.getSynthesizer();
	Map<String,Object> info = new HashMap<String,Object>();
	info.put("resampletType", "sinc");
	info.put("maxPolyphony", "1024");
	AudioInputStream stream = synthesizer.openStream(format, info);
	 
	/*
	* Play midi note 60 on channel 1 for 1 sec.
	*/
	ShortMessage msg = new ShortMessage();
	Receiver recv = synthesizer.getReceiver();
	msg.setMessage(ShortMessage.PROGRAM_CHANGE, 0, 48, 0);
	recv.send(msg, 0);
	msg.setMessage(ShortMessage.NOTE_ON, 0, 60, 80);
	recv.send(msg, 0);
	msg.setMessage(ShortMessage.NOTE_ON, 0, 60, 0);
	recv.send(msg, 1000000);
	 
	/*
	* Calculate how many bytes 4 seconds are.
	*/
	long len = (long)(format.getFrameRate() * 4);
	 
	/*
	* Write 10 second into output file.
	*/
	stream = new AudioInputStream(stream, format, len);
	AudioSystem.write(stream, AudioFileFormat.Type.WAVE, new File("output.wav"));
	 
	/*
	* Close all resources.
	*/
	synthesizer.close();
}