NIMSDK Hierarchy Class Hierarchy NSObject NIMQChatAudioProfile NIMQChatGetMediaChannelInfoResult NIMQChatMediaKit NIMQChatMediaOption NIMQChatMemberMediaStatusInfo NIMQChatMemberVolumeInfo NIMQChatUpdateMediaChannelParam NIMQChatVideoCanvas NIMQChatVideoFrame NIMQChatVideoProfile NIMScreenShareBroadcasterOptions Protocol References NIMQChatMediaChannelDelegate NIMQChatMediaChannelManager NIMQChatVideoRenderSinkDelegate Constant References NIMQChatAudioOutputDevice NIMQChatAudioQuality NIMQChatAudioScenario NIMQChatMediaChannelEndReason NIMQChatVideoFormatType NIMQChatVideoMirrorMode NIMQChatVideoRenderScaleMode NIMQChatVideoRotationType NIMQChatVideoStreamType