DefaultMixers.java 文件源码

private static AudioFormat getFirstLinearFormat(Line.Info[] infos) {
    for (int i = 0; i < infos.length; i++) {
        if (infos[i] instanceof DataLine.Info) {
            AudioFormat[] formats = ((DataLine.Info) infos[i]).getFormats();
            for (int j = 0; j < formats.length; j++) {
                AudioFormat.Encoding encoding = formats[j].getEncoding();
                int sampleSizeInBits = formats[j].getSampleSizeInBits();
                if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED) &&
                    sampleSizeInBits == 16 ||
                    encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED) &&
                    sampleSizeInBits == 16) {
                    return formats[j];
                }
            }
        }
    }
    return null;
}