StdAudio.java 文件源码

private static void init() {
    try {
        // 44,100 samples per second, 16-bit audio, mono, signed PCM, little Endian
        AudioFormat format = new AudioFormat((float) SAMPLE_RATE, BITS_PER_SAMPLE, 1, true, false);
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

        line = (SourceDataLine) AudioSystem.getLine(info);
        line.open(format, SAMPLE_BUFFER_SIZE * BYTES_PER_SAMPLE);

        // the internal buffer is a fraction of the actual buffer size, this choice is arbitrary
        // it gets divided because we can't expect the buffered data to line up exactly with when
        // the sound card decides to push out its samples.
        buffer = new byte[SAMPLE_BUFFER_SIZE * BYTES_PER_SAMPLE/3];
    }
    catch (LineUnavailableException e) {
        System.out.println(e.getMessage());
    }

    // no sound gets made before this call
    line.start();
}