public static extern bool WaveformPlayerOutputECGAndPPG(ref PLAY_RAW_DATA ecgData, PPGChannel channelNo, ref PLAY_RAW_DATA ppgData);
public static extern bool WaveformPlayerOutputPPG(PPGChannel channelNo, ref PLAY_RAW_DATA ppgData);
public static extern bool OutputPPG(PPGChannel channelNo, ref PPG_WAVEFORM waveform, OutputSignalCallback cb);