DirectAudioDevice.java 文件源码

DirectAudioDevice(DirectAudioDeviceProvider.DirectAudioDeviceInfo portMixerInfo) {
    // pass in Line.Info, mixer, controls
    super(portMixerInfo,              // Mixer.Info
          null,                       // Control[]
          null,                       // Line.Info[] sourceLineInfo
          null);                      // Line.Info[] targetLineInfo

    if (Printer.trace) Printer.trace(">> DirectAudioDevice: constructor");

    // source lines
    DirectDLI srcLineInfo = createDataLineInfo(true);
    if (srcLineInfo != null) {
        sourceLineInfo = new Line.Info[2];
        // SourcedataLine
        sourceLineInfo[0] = srcLineInfo;
        // Clip
        sourceLineInfo[1] = new DirectDLI(Clip.class, srcLineInfo.getFormats(),
                                          srcLineInfo.getHardwareFormats(),
                                          32, // arbitrary minimum buffer size
                                          AudioSystem.NOT_SPECIFIED);
    } else {
        sourceLineInfo = new Line.Info[0];
    }

    // TargetDataLine
    DataLine.Info dstLineInfo = createDataLineInfo(false);
    if (dstLineInfo != null) {
        targetLineInfo = new Line.Info[1];
        targetLineInfo[0] = dstLineInfo;
    } else {
        targetLineInfo = new Line.Info[0];
    }
    if (Printer.trace) Printer.trace("<< DirectAudioDevice: constructor completed");
}