Java AudioSynthesizer类代码示例

import com.sun.media.sound.AudioSynthesizer; //导入依赖的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; //导入依赖的package包/类
/**
 * Find available AudioSynthesizer.
 * @return
 * @throws MidiUnavailableException
 */
private AudioSynthesizer findAudioSynthesizer() throws MidiUnavailableException {
    // First check if default synthesizer is AudioSynthesizer.
    Synthesizer synth = MidiSystem.getSynthesizer();
    if (synth instanceof AudioSynthesizer) {
        return (AudioSynthesizer)synth;
    }

    // If default synthesizer is not AudioSynthesizer, check others.
    MidiDevice.Info[] midiDeviceInfo = MidiSystem.getMidiDeviceInfo();
    for (MidiDevice.Info aMidiDeviceInfo : midiDeviceInfo) {
        MidiDevice dev = MidiSystem.getMidiDevice(aMidiDeviceInfo);
        if (dev instanceof AudioSynthesizer) {
            return (AudioSynthesizer) dev;
        }
    }

    return null;        // No AudioSynthesizer was found, return null.
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
/**
 * Find available AudioSynthesizer
 */
public static AudioSynthesizer findAudioSynthesizer() throws MidiUnavailableException
{
	// First check if default synthesizer is AudioSynthesizer.
	Synthesizer synth = MidiSystem.getSynthesizer();
	if (synth instanceof AudioSynthesizer)
		return (AudioSynthesizer) synth;

	// If default synhtesizer is not AudioSynthesizer, check others.
	for (Info info : MidiSystem.getMidiDeviceInfo())
	{
		MidiDevice dev = MidiSystem.getMidiDevice(info);
		if (dev instanceof AudioSynthesizer)
			return (AudioSynthesizer) dev;
	}

	// No AudioSynthesizer was found, return null.
	return null;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
public static AudioSynthesizer findAudioSynthesizer() throws MidiUnavailableException, IOException, InvalidMidiDataException {
    // First check if default synthesizer is AudioSynthesizer.
    Synthesizer synth = MidiSystem.getSynthesizer();
    if (synth instanceof AudioSynthesizer) {
        return (AudioSynthesizer) synth;
    }

    // If default synhtesizer is not AudioSynthesizer, check others.
    Info[] infos = MidiSystem.getMidiDeviceInfo();
    for (int i = 0; i < infos.length; i++) {
        MidiDevice dev = MidiSystem.getMidiDevice(infos[i]);
        if (dev instanceof AudioSynthesizer) {
            return (AudioSynthesizer) dev;
        }
    }

    // No AudioSynthesizer was found, return null.
    return null;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
public static AudioSynthesizer findAudioSynthesizer()
		throws MidiUnavailableException {
	// First check if default synthesizer is AudioSynthesizer.
	Synthesizer synth = MidiSystem.getSynthesizer();
	if (synth instanceof AudioSynthesizer)
		return (AudioSynthesizer) synth;

	// If default synhtesizer is not AudioSynthesizer, check others.
	Info[] infos = MidiSystem.getMidiDeviceInfo();
	for (int i = 0; i < infos.length; i++) {
		MidiDevice dev = MidiSystem.getMidiDevice(infos[i]);
		if (dev instanceof AudioSynthesizer)
			return (AudioSynthesizer) dev;
	}

	// No AudioSynthesizer was found, return null.
	return null;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
public static AudioSynthesizer findAudioSynthesizer()
	throws MidiUnavailableException {
	// First check if default synthesizer is AudioSynthesizer.
	Synthesizer synth = MidiSystem.getSynthesizer();
	if (synth instanceof AudioSynthesizer)
		return (AudioSynthesizer) synth;

	// If default synhtesizer is not AudioSynthesizer, check others.
	Info[] infos = MidiSystem.getMidiDeviceInfo();
	for (val info : infos) {
		MidiDevice dev = MidiSystem.getMidiDevice(info);
		if (dev instanceof AudioSynthesizer)
			return (AudioSynthesizer) dev;
	}

	// No AudioSynthesizer was found, return null.
	return null;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
private AudioSynthesizer findAudioSynthesizer()
	throws MidiUnavailableException {
	//first check if default synthesizer is AudioSynthesizer.
	Synthesizer synth = MidiSystem.getSynthesizer();
	if (synth instanceof AudioSynthesizer)
		return (AudioSynthesizer) synth;

	//if default synthesizer is not AudioSynthesizer, check others.
	Info[] infos = MidiSystem.getMidiDeviceInfo();
	for (val info : infos) {
		MidiDevice dev = MidiSystem.getMidiDevice(info);
		if (dev instanceof AudioSynthesizer)
			return (AudioSynthesizer) dev;
	}

	//no AudioSynthesizer was found, return null.
	return null;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
public static void main(String[] args) throws Exception
{
    AudioSynthesizer synth = new SoftSynthesizer();
    AudioFormat format = new AudioFormat(44100, 16, 2, true, false);
    AudioInputStream stream = synth.openStream(format, null);

    // Make all voices busy, e.g.
    // send midi on and midi off on all available voices
    MidiChannel ch1 = synth.getChannels()[0];
    ch1.programChange(48); // Use contionus instrument like string ensemble
    for (int i = 0; i < synth.getMaxPolyphony(); i++) {
        ch1.noteOn(64, 64);
        ch1.noteOff(64);
    }

    // Now send single midi on, and midi off message
    ch1.noteOn(64, 64);
    ch1.noteOff(64);

    // Read 10 sec from stream, by this time all voices should be inactvie
    stream.skip(format.getFrameSize() * ((int)(format.getFrameRate() * 20)));

    // If no voice are active, then this test will pass
    VoiceStatus[] v = synth.getVoiceStatus();
    for (int i = 0; i < v.length; i++) {
        if(v[i].active)
        {
            throw new RuntimeException("Not all voices are inactive!");
        }
    }

    // Close the synthesizer after use
    synth.close();
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的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; //导入依赖的package包/类
MidiToWavRenderer() throws MidiUnavailableException, InvalidMidiDataException, IOException {
    try {
        synth = (AudioSynthesizer) MidiSystem.getSynthesizer();
    } catch (ClassCastException e) {
        throw new Error("Please make sure Gervill is included in the classpath: "
                + "it should be de default synth. These are the currently installed synths: "
                + Arrays.toString(MidiSystem.getMidiDeviceInfo()), e);
    }
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的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; //导入依赖的package包/类
public static AudioSynthesizer getLotroAudioSynthesizer() throws MidiUnavailableException,
		InvalidMidiDataException, IOException
{
	AudioSynthesizer synth = findAudioSynthesizer();
	if (synth != null)
		initLotroSynthesizer(synth);
	return synth;
}
 

import com.sun.media.sound.AudioSynthesizer; //导入依赖的package包/类
public static void render(Sequence sequence, OutputStream outStream) {
    try {
        // Find available AudioSynthesizer.
        AudioSynthesizer synth = findAudioSynthesizer();
        if (synth == null) {
            logger.warn("No AudioSynhtesizer was found!");
            return;
        }

        // Open AudioStream from AudioSynthesizer.
        AudioInputStream stream = synth.openStream(null, null);

        Generator.loadSoundbankInstruments(synth);
        // Play Sequence into AudioSynthesizer Receiver.
        double total = send(sequence, synth.getReceiver());

        // Calculate how long the WAVE file needs to be.
        long len = (long) (stream.getFormat().getFrameRate() * (total + 4));
        stream = new AudioInputStream(stream, stream.getFormat(), len);

        AudioSystem.write(stream, AudioFileFormat.Type.WAVE, outStream);

        synth.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}