Java SF2Sample.setSampleRate方法代码示例

import com.sun.media.sound.SF2Sample; //导入方法依赖的package包/类
public static SF2Soundbank createTestSoundbank() {
    // Create impulse instrument
    // used to measure timing of note-on playback
    SF2Soundbank soundbank = new SF2Soundbank();
    float[] data = new float[100];
    Arrays.fill(data, 0);
    data[0] = 1.0f;
    byte[] bdata = new byte[data.length * format.getFrameSize()];
    AudioFloatConverter.getConverter(format).toByteArray(data, bdata);

    SF2Sample sample = new SF2Sample(soundbank);
    sample.setName("Test Sample");
    sample.setData(bdata);
    sample.setSampleRate((long) format.getSampleRate());
    sample.setOriginalPitch(69);
    soundbank.addResource(sample);

    SF2Layer layer = new SF2Layer(soundbank);
    layer.setName("Test Layer");
    soundbank.addResource(layer);
    SF2LayerRegion region = new SF2LayerRegion();
    region.setSample(sample);
    layer.getRegions().add(region);

    SF2Instrument ins = new SF2Instrument(soundbank);
    ins.setName("Test Instrument");
    soundbank.addInstrument(ins);
    SF2InstrumentRegion insregion = new SF2InstrumentRegion();
    insregion.setLayer(layer);
    ins.getRegions().add(insregion);

    return soundbank;
}
 

import com.sun.media.sound.SF2Sample; //导入方法依赖的package包/类
public SF2Sample newSimpleFFTSample(SF2Soundbank sf2, String name,
        double[] data, double base, int fadeuptime) {

    int fftsize = data.length / 2;
    AudioFormat format = new AudioFormat(44100, 16, 1, true, false);
    double basefreq = (base / fftsize) * format.getSampleRate() * 0.5;

    randomPhase(data);
    ifft(data);
    data = realPart(data);
    normalize(data, 0.9);
    float[] fdata = toFloat(data);
    fdata = loopExtend(fdata, fdata.length + 512);
    fadeUp(fdata, fadeuptime);
    byte[] bdata = toBytes(fdata, format);

    /*
     * Create SoundFont2 sample.
     */
    SF2Sample sample = new SF2Sample(sf2);
    sample.setName(name);
    sample.setData(bdata);
    sample.setStartLoop(256);
    sample.setEndLoop(fftsize + 256);
    sample.setSampleRate((long) format.getSampleRate());
    double orgnote = (69 + 12)
            + (12 * Math.log(basefreq / 440.0) / Math.log(2));
    sample.setOriginalPitch((int) orgnote);
    sample.setPitchCorrection((byte) (-(orgnote - (int) orgnote) * 100.0));
    sf2.addResource(sample);

    return sample;
}
 

import com.sun.media.sound.SF2Sample; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception
{
    // Create instance of the synthesizer with very low polyphony
    AudioSynthesizer synth = new SoftSynthesizer();
    AudioFormat format = new AudioFormat(44100, 16, 2, true, false);
    Map<String, Object> p = new HashMap<String, Object>();
    p.put("max polyphony", new Integer(5));
    AudioInputStream stream = synth.openStream(format, p);

    // Create instrument with too many regions (more than max polyphony)
    SF2Soundbank sf2 = new SF2Soundbank();

    SF2Sample sample = new SF2Sample(sf2);
    sample.setName("test sample");
    sample.setData(new byte[100]);
    sample.setSampleRate(44100);
    sample.setOriginalPitch(20);
    sf2.addResource(sample);

    SF2Layer layer = new SF2Layer(sf2);
    layer.setName("test layer");
    sf2.addResource(layer);

    for (int i = 0; i < 100; i++) {
        SF2LayerRegion region = new SF2LayerRegion();
        region.setSample(sample);
        layer.getRegions().add(region);
    }

    SF2Instrument ins = new SF2Instrument(sf2);
    ins.setPatch(new Patch(0,0));
    ins.setName("test instrument");
    sf2.addInstrument(ins);

    SF2InstrumentRegion insregion = new SF2InstrumentRegion();
    insregion.setLayer(layer);
    ins.getRegions().add(insregion);

    // Load the test soundbank into the synthesizer
    synth.unloadAllInstruments(synth.getDefaultSoundbank());
    synth.loadAllInstruments(sf2);

    // Send out one midi on message
    MidiChannel ch1 = synth.getChannels()[0];
    ch1.programChange(0);
    ch1.noteOn(64, 64);

    // Read 1 sec from stream
    stream.skip(format.getFrameSize() * ((int)(format.getFrameRate() * 2)));

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