/** Retrieves the total number of the indexed audio playback devices in the system.
*
* @return Total number of the indexed audio playback devices.
*/
public override int GetAudioPlaybackDeviceCount()
{
if (mEngine == null)
{
return((int)ERROR_CODE.ERROR_NOT_INIT_ENGINE);
}
return(IRtcEngineNative.getAudioPlaybackDeviceCount());
}