DirectAudioDevice.java 文件源码

@Override
public int getMaxLines(Line.Info info) {
    Line.Info fullInfo = getLineInfo(info);

    // if it's not supported at all, return 0.
    if (fullInfo == null) {
        return 0;
    }

    if (fullInfo instanceof DataLine.Info) {
        // DirectAudioDevices should mix !
        return getMaxSimulLines();
    }

    return 0;
}