NERtcChannelDelegate class provides callbacks that report events and statistics of a specified channel. More...

#import <NERtcChannelDelegate.h>

Inheritance diagram for <NERtcChannelDelegate>:

Instance Methods
(void)	- onNERtcChannelConnectionStateChangeWithState:reason:
	Occurs when the state of the channel connection between the SDK and the server changes. More...

(void)	- onNERtcChannelDidLeaveChannelWithResult:
	Occurs when a user leaves a room. More...

(void)	- onNERtcChannelUserDidJoinWithUserID:userName:
	Occurs when a remote user joins the current room. More...

(void)	- onNERtcChannelUserDidLeaveWithUserID:reason:
	Occurs when a remote user leaves a room. More...

(void)	- onNERtcChannelDidClientRoleChanged:newRole:
	Occurs when a user changes the role in live streaming. More...

(void)	- onNERtcChannelUserAudioDidStart:
	Occurs when a remote user enables audio. More...

(void)	- onNERtcChannelUserAudioDidStop:
	Occurs when a remote user disables audio. More...

(void)	- onNERtcChannelUser:audioMuted:
	Occurs when a remote user stops or resumes sending audio streams. More...

(void)	- onNERtcChannelUserSubStreamAudioDidStart:
	Occurs when a remote user enables the audio substream. More...

(void)	- onNERtcChannelUserSubStreamAudioDidStop:
	Occurs when a remote user stops the audio substream. More...

(void)	- onNERtcChannelUser:subStreamAudioMuted:
	Occurs when a remote user pauses or resumes publishing the audio substream. More...

(void)	- onNERtcChannelUserVideoDidStartWithUserID:videoProfile:
	Occurs when a remote user enables video. More...

(void)	- onNERtcChannelUserVideoDidStop:
	Occurs when a remote user disables video. More...

(void)	- onNERtcChannelUserSubStreamDidStartWithUserID:subStreamProfile:
	Occurs when a remote user enables screen sharing by using the substream. More...

(void)	- onNERtcChannelUserSubStreamDidStop:
	Occurs when a remote user stops screen sharing by using the substream. More...

(void)	- onNERtcChannelUser:videoMuted:
	Occurs when a remote user stops or resumes sending video streams. More...

(void)	- onNERtcChannelDidDisconnectWithReason:
	After the connection breaks down and the SDK fails to connect to the server three consecutive times. More...

(void)	- onNERtcChannelReconnectingStart
	Occurs when reconnection starts. More...

(void)	- onNERtcChannelRejoinChannel:
	Occurs when a user rejoins a room. More...

(void)	- onNERtcChannelFirstAudioDataDidReceiveWithUserID:
	Occurs when the first audio frame from a remote user is received. More...

(void)	- onNERtcChannelFirstVideoDataDidReceiveWithUserID:
	Occurs when the first audio frame from a remote user is received. More...

(void)	- onNERtcChannelFirstAudioFrameDecoded:
	Occurs when the first audio frame from a remote user is decoded. More...

(void)	- onNERtcChannelFirstVideoFrameDecoded:width:height:
	Occurs when the first video frame from a remote user is displayed. More...

(void)	- onNERtcChannelRecvSEIMsg:message:
	Occurs when the content of remote SEI is received. More...

(void)	- onNERtcChannelLiveStreamState:taskID:url:
	Occurs when the streaming state in live streaming changes. More...

(void)	- onLocalAudioVolumeIndication:
	Occurs when the system prompts the current local audio volume. More...

(void)	- onLocalAudioVolumeIndication:withVad:
	Occurs when the system prompts the current local audio volume. More...

(void)	- onRemoteAudioVolumeIndication:totalVolume:
	Occurs when the system prompts the active speaker and the audio volume. More...

(void)	- onNERtcChannelLocalPublishFallbackToAudioOnly:streamType:
	Occurs when the published local media stream falls back to an audio-only stream due to poor network conditions or switches back to audio and video stream after the network conditions improve. More...

(void)	- onNERtcChannelRemoteSubscribeFallbackToAudioOnly:isFallback:streamType:
	Occurs when the subscribed remote media stream falls back to audio-only stream due to poor network conditions or switches back to the audio and video stream after the network conditions improve. More...

(void)	- onNERtcChannelDidError:
	Occurs when an error occurs. More...

(void)	- onNERtcChannelMediaRightChangeWithAudio:video:
	音视频权限被禁止通知 More...

(void)	- onNERtcChannelDidWarning:msg:
	Occurs when a warning occurs. More...

(void)	- onNERtcChannelMediaRelayStateDidChange:channelName:
	Occurs when the state of the media stream relay changes. More...

(void)	- onNERtcChannelDidReceiveChannelMediaRelayEvent:channelName:error:
	Returns forwarding events during the media stream relay. More...

Detailed Description

NERtcChannelDelegate class provides callbacks that report events and statistics of a specified channel.

Since: V4.5.0

Method Documentation

◆ onLocalAudioVolumeIndication:

- (void) onLocalAudioVolumeIndication: (int) volume

optional

Occurs when the system prompts the current local audio volume.

This callback is disabled by default. You can enable the callback by calling the enableAudioVolumeIndication method. After the callback is enabled, if a local user speaks, the SDK triggers the callback based on the time interval specified in the enableAudioVolumeIndication method. If the local user mutes the local audio by calling muteLocalAudio, the SDK no longer reports this callback.

Since: V4.5.0

Parameters

volume The audio volume. Value range: 0 to 100.

◆ onLocalAudioVolumeIndication:withVad:

- (void) onLocalAudioVolumeIndication:	(int)	volume
withVad:	(BOOL)	enableVad

optional

Occurs when the system prompts the current local audio volume.

By default, the callback is disabled. You can enable the callback by calling the enableAudioVolumeIndication method. After the callback is enabled, if a local user speaks, the SDK triggers the callback based on the time interval specified in the enableAudioVolumeIndication method.
If the local audio is muted by calling muteLocalAudioStream, the SDK will set the volume to 0 and return to the application layer.

Since: V4.6.10

Parameters

volume	indicates the mixing audio volume. Value range: 0 to 100.
enableVad	indicates whether voice activity detection is enabled.

◆ onNERtcChannelConnectionStateChangeWithState:reason:

- (void) onNERtcChannelConnectionStateChangeWithState:	(NERtcConnectionStateType)	state
reason:	(NERtcReasonConnectionChangedType)	reason

optional

Occurs when the state of the channel connection between the SDK and the server changes.

The callback is triggered when the state of the channel connection changes. The callback returns the current state of channel and the reason why the state changes.

Since: V4.5.0

Parameters

state	The state of the channel connection. For more information, see `NERtcConnectionStateType`.
reason	The reason why the state changes. For more information, see `NERtcReasonConnectionChangedType`.

◆ onNERtcChannelDidClientRoleChanged:newRole:

- (void) onNERtcChannelDidClientRoleChanged:	(NERtcClientRole)	oldRole
newRole:	(NERtcClientRole)	newRole

optional

Occurs when a user changes the role in live streaming.

After the user joins a room, the user can call the setClientRole method to change the role. Then, the callback is triggered. For example, switching from host to audience, or from audience to host.

Note

In live streaming, if you join a room and successfully call this method to change the role, the following callbacks are triggered.

If the role changes from host to audience, the onClientRoleChange callback is triggered on the client, and the onUserLeave callback is triggered on a remote client.
If the role changes from audience to host, the onClientRoleChange callback is triggered on the client, and the onUserJoined callback is triggered on a remote client.

Parameters

oldRole	The role before the user changes the role.
newRole	The role after the user changes the role.

◆ onNERtcChannelDidDisconnectWithReason:

- (void) onNERtcChannelDidDisconnectWithReason: (NERtcError) reason

optional

After the connection breaks down and the SDK fails to connect to the server three consecutive times.

Note

The callback is triggered if the SDK fails to connect to the server three consecutive times after you successfully call the joinChannel method.
If the SDK fails to connect to the server three consecutive times, the SDK stops retries.

Since: V4.5.0

Parameters

reason The reason why the network is disconnected. For more information, see NERtcEngineErrorCode.NERtcError.

◆ onNERtcChannelDidError:

- (void) onNERtcChannelDidError: (NERtcError) errCode

optional

Occurs when an error occurs.

The callback is triggered to report an error related to network or media during SDK runtime. In most cases, the SDK cannot fix the issue and resume running. The SDK requires the app to take action or informs the user of the issue.

Since: V4.5.0

Parameters

errCode The error code. For more information, see NERtcEngineErrorCode.NERtcError.

◆ onNERtcChannelDidLeaveChannelWithResult:

- (void) onNERtcChannelDidLeaveChannelWithResult: (NERtcError) result

optional

Occurs when a user leaves a room.

After an app invokes the leaveChannel method, SDK prompts whether the app successfully leaves the room.

Since: V4.5.0

Parameters

result The result of the leaveChannel operation. For more information, see NERtcEngineErrorCode.NERtcError.

◆ onNERtcChannelDidReceiveChannelMediaRelayEvent:channelName:error:

- (void) onNERtcChannelDidReceiveChannelMediaRelayEvent:	(NERtcChannelMediaRelayEvent)	event
channelName:	(NSString *)	channelName
error:	(NERtcError)	error

optional

Returns forwarding events during the media stream relay.

Since: V4.5.0

Parameters

event	The media stream relay event. For more information, see `NERtcChannelMediaRelayEvent`.
channelName	The name of the destination room where the media streams are relayed.
error	The specific error code. For more information, see `NERtcEngineErrorCode.NERtcError`.

◆ onNERtcChannelDidWarning:msg:

- (void) onNERtcChannelDidWarning:	(NERtcWarning)	warnCode
msg:	(NSString *)	msg

optional

Occurs when a warning occurs.

The callback is triggered to report a warning related to network or media during SDK runtime. In most cases, the SDK cannot fix the issue and resume running. The SDK requires the app to take action or informs the user of the issue.

Since: V4.5.0

Parameters

warnCode	The warn code. For more information, see `NERtcWarning`.
msg	The warning description.

◆ onNERtcChannelFirstAudioDataDidReceiveWithUserID:

- (void) onNERtcChannelFirstAudioDataDidReceiveWithUserID: (uint64_t) userID

optional

Occurs when the first audio frame from a remote user is received.

Since: V4.5.0

Parameters

userID The ID of a remote user whose audio streams are sent.

◆ onNERtcChannelFirstAudioFrameDecoded:

- (void) onNERtcChannelFirstAudioFrameDecoded: (uint64_t) userID

optional

Occurs when the first audio frame from a remote user is decoded.

Since: V4.5.0

Parameters

userID The ID of a remote user whose audio streams are sent.

◆ onNERtcChannelFirstVideoDataDidReceiveWithUserID:

- (void) onNERtcChannelFirstVideoDataDidReceiveWithUserID: (uint64_t) userID

optional

Occurs when the first audio frame from a remote user is received.

If the first video frame from a remote user is displayed in the view, the callback is triggered.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID The ID of a remote user whose video streams are sent.

◆ onNERtcChannelFirstVideoFrameDecoded:width:height:

- (void) onNERtcChannelFirstVideoFrameDecoded:	(uint64_t)	userID
width:	(uint32_t)	width
height:	(uint32_t)	height

optional

Occurs when the first video frame from a remote user is displayed.

If the engine receives the first frame of remote video streams, the callback is triggered. The callback allows the app to set the video canvas.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID	The ID of a remote user whose video streams are sent.
width	The width of the first video frame. Unit: px.
height	The height of the first video frame. Unit: px.

◆ onNERtcChannelLiveStreamState:taskID:url:

- (void) onNERtcChannelLiveStreamState:	(NERtcLiveStreamStateCode)	state
taskID:	(NSString *)	taskID
url:	(NSString *)	url

optional

Occurs when the streaming state in live streaming changes.

Since: V4.5.0

Parameters

state	The streaming state in live streaming. For more information, see `NERtcLiveStreamStateCode`.
taskID	The ID of a streaming task.
url	The URL for the streaming task.

◆ onNERtcChannelLocalPublishFallbackToAudioOnly:streamType:

- (void) onNERtcChannelLocalPublishFallbackToAudioOnly:	(BOOL)	isFallback
streamType:	(NERtcStreamChannelType)	streamType

optional

Occurs when the published local media stream falls back to an audio-only stream due to poor network conditions or switches back to audio and video stream after the network conditions improve.

If you call setLocalPublishFallbackOption and set option to AUDIO_ONLY, this callback is triggered when the locally published stream falls back to audio-only mode due to poor uplink network conditions, or when the audio stream switches back to the audio and video stream after the uplink network conditions improve.

Since: V4.5.0

Parameters

isFallback	The option whether the locally published stream falls back to audio-only mode or switches back to audio and video stream. YES: The published stream from a local client falls back to audio-only mode due to poor uplink network conditions. NO: The audio stream switches back to the audio and video stream after the uplink network condition improves.
streamType	The type of the video stream, such as mainstream and substream. For more information, see `NERtcStreamChannelType`.

◆ onNERtcChannelMediaRelayStateDidChange:channelName:

- (void) onNERtcChannelMediaRelayStateDidChange:	(NERtcChannelMediaRelayState)	state
channelName:	(NSString *)	channelName

optional

Occurs when the state of the media stream relay changes.

Since: V4.5.0

Parameters

state	The state of the media stream relay. For more information, see `NERtcChannelMediaRelayState`.
channelName	The name of the destination room where the media streams are relayed.

◆ onNERtcChannelMediaRightChangeWithAudio:video:

- (void) onNERtcChannelMediaRightChangeWithAudio:	(BOOL)	isAudioBannedByServer
video:	(BOOL)	isVideoBannedByServer

optional

音视频权限被禁止通知

Parameters

isAudioBannedByServer	音频是否被服务器禁止
isVideoBannedByServer	视频是否被服务器禁止

◆ onNERtcChannelReconnectingStart

- (void) onNERtcChannelReconnectingStart

optional

Occurs when reconnection starts.

If a client is disconnected from the server, the SDK starts reconnecting. The callback is triggered when the reconnection starts. For more information about the reconnection result, see onNERtcEngineRejoinChannel and onNERtcEngineDidDisconnectWithReason.

Since: V4.5.0

◆ onNERtcChannelRecvSEIMsg:message:

- (void) onNERtcChannelRecvSEIMsg:	(uint64_t)	userID
message:	(NSData *)	message

optional

Occurs when the content of remote SEI is received.

After a remote client successfully sends SEI, the local client receives a message returned by the callback.

Note: The audio-only SDK disables this callback. If you need to use the callback, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID	The ID of the user who sends SEI.
message	The message that contains SEI.

◆ onNERtcChannelRejoinChannel:

- (void) onNERtcChannelRejoinChannel: (NERtcError) result

optional

Occurs when a user rejoins a room.

If a client is disconnected from the server due to poor network quality, the SDK starts reconnecting. If the client and server are reconnected, the callback is triggered.

Since: V4.5.0

Parameters

result The result of reconnection. For more information, see NERtcEngineErrorCode.NERtcError.

◆ onNERtcChannelRemoteSubscribeFallbackToAudioOnly:isFallback:streamType:

- (void) onNERtcChannelRemoteSubscribeFallbackToAudioOnly:	(uint64_t)	uid
isFallback:	(BOOL)	isFallback
streamType:	(NERtcStreamChannelType)	streamType

optional

Occurs when the subscribed remote media stream falls back to audio-only stream due to poor network conditions or switches back to the audio and video stream after the network conditions improve.

If you call setRemoteSubscribeFallbackOption and set option to AUDIO_ONLY, this callback is triggered when the subscribed remote media stream falls back to audio-only mode due to poor downlink network conditions, or when the subscribed remote media stream switches back to the audio and video stream after the downlink network conditions improve.

Since: V4.5.0

Parameters

isFallback	The option whether the subscribed remote media stream falls back to audio-only mode or switches back to the audio and video stream. YES: The subscribed remote media stream falls back to audio-only mode due to poor downstream network conditions. NO: The subscribed remote media stream switches back to the audio and video stream after the downstream network conditions improve.
uid	The ID of a remote user.
streamType	The type of the video stream, such as mainstream and substream. For more information, see `NERtcStreamChannelType`.

◆ onNERtcChannelUser:audioMuted:

- (void) onNERtcChannelUser:	(uint64_t)	userID
audioMuted:	(BOOL)	muted

optional

Occurs when a remote user stops or resumes sending audio streams.

Since: V4.5.0

Parameters

userID	The ID of the user whose audio streams are sent.
muted	The option whether to pause sending audio streams.

◆ onNERtcChannelUser:subStreamAudioMuted:

- (void) onNERtcChannelUser:	(uint64_t)	userID
subStreamAudioMuted:	(BOOL)	muted

optional

Occurs when a remote user pauses or resumes publishing the audio substream.

Since: V4.6.10

Parameters

userID	User ID indicating which user performs the operation.
muted	indicates if the audio substream is stopped. YES: stops publishing the audio substream. No: resumes publishing the audio substream.

◆ onNERtcChannelUser:videoMuted:

- (void) onNERtcChannelUser:	(uint64_t)	userID
videoMuted:	(BOOL)	muted

optional

Occurs when a remote user stops or resumes sending video streams.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID	The ID of the user whose video streams are sent.
muted	The option whether to pause sending video streams.

◆ onNERtcChannelUserAudioDidStart:

- (void) onNERtcChannelUserAudioDidStart: (uint64_t) userID

optional

Occurs when a remote user enables audio.

Since: V4.5.0

Parameters

userID The ID of a remote user.

◆ onNERtcChannelUserAudioDidStop:

- (void) onNERtcChannelUserAudioDidStop: (uint64_t) userID

optional

Occurs when a remote user disables audio.

Since: V4.5.0

Parameters

userID The ID of a remote user.

◆ onNERtcChannelUserDidJoinWithUserID:userName:

- (void) onNERtcChannelUserDidJoinWithUserID:	(uint64_t)	userID
userName:	(NSString *)	userName

optional

Occurs when a remote user joins the current room.

The callback prompts that a remote user joins the room and returns the ID of the user that joins the room. If the user ID already exists, the remote user also receives a message that the user already joins the room, which is returned by the callback. The callback is triggered in the following cases:

A remote user joins the room by calling the joinChannel method.
A remote user rejoins the room after the client is disconnected.
Since
V4.5.0

Parameters

userID The ID of a remote user.

userName The name of the user who joins the room. The field is deprecated. Ignore the field.

◆ onNERtcChannelUserDidLeaveWithUserID:reason:

- (void) onNERtcChannelUserDidLeaveWithUserID:	(uint64_t)	userID
reason:	(NERtcSessionLeaveReason)	reason

optional

Occurs when a remote user leaves a room.

A message is returned that a remote user leaves the room or becomes disconnected. A user leaves a room due to the following reasons: the user exit the room or connections time out.

If a user leaves the room, the remote user receives a message that indicates that the user leaves the room.
If the connection times out, and the user does not receive data packets for a time period of 40 to 50 seconds, then the user becomes disconnected.

Since: V4.5.0

Parameters

userID	The ID of the user that leaves the room.
reason	The reason why the remote user leaves. For more information, see `NERtcSessionLeaveReason`.

◆ onNERtcChannelUserSubStreamAudioDidStart:

- (void) onNERtcChannelUserSubStreamAudioDidStart: (uint64_t) userID

optional

Occurs when a remote user enables the audio substream.

Since: V4.6.10

Parameters

userID Remote user ID.

◆ onNERtcChannelUserSubStreamAudioDidStop:

- (void) onNERtcChannelUserSubStreamAudioDidStop: (uint64_t) userID

optional

Occurs when a remote user stops the audio substream.

Since: V4.6.10

Parameters

userID remote user ID.

◆ onNERtcChannelUserSubStreamDidStartWithUserID:subStreamProfile:

- (void) onNERtcChannelUserSubStreamDidStartWithUserID:	(uint64_t)	userID
subStreamProfile:	(NERtcVideoProfileType)	profile

optional

Occurs when a remote user enables screen sharing by using the substream.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID	The ID of a remote user.
profile	The resolution of the remote video. For more information, see `NERtcVideoProfileType`.

◆ onNERtcChannelUserSubStreamDidStop:

- (void) onNERtcChannelUserSubStreamDidStop: (uint64_t) userID

optional

Occurs when a remote user stops screen sharing by using the substream.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID The ID of a remote user.

◆ onNERtcChannelUserVideoDidStartWithUserID:videoProfile:

- (void) onNERtcChannelUserVideoDidStartWithUserID:	(uint64_t)	userID
videoProfile:	(NERtcVideoProfileType)	profile

optional

Occurs when a remote user enables video.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID	The ID of the user whose video streams are sent.
profile	The video profile of the remote user. For more information, see `NERtcVideoProfileType`.

◆ onNERtcChannelUserVideoDidStop:

- (void) onNERtcChannelUserVideoDidStop: (uint64_t) userID

optional

Occurs when a remote user disables video.

Note: The audio-only SDK disables this API. If you need to use the API, you can download the standard SDK from the official website of CommsEase and replace the audio-only SDK.

Since: V4.5.0

Parameters

userID The ID of a remote user.

◆ onRemoteAudioVolumeIndication:totalVolume:

- (void) onRemoteAudioVolumeIndication:	(nullable NSArray< NERtcAudioVolumeInfo * > *)	speakers
totalVolume:	(int)	totalVolume

optional

Occurs when the system prompts the active speaker and the audio volume.

By default, the callback is disabled. You can enable the callback by calling the enableAudioVolumeIndication method. After the callback is enabled, if a local user speaks, the SDK triggers the callback based on the time interval specified in the enableAudioVolumeIndication method. In the array returned:

If a uid is contained in the array returned in the last response but not in the array returned in the current response. The remote user with the uid does not speak by default.
If the volume is 0, the user does not speak.
If the array is empty, the remote user does not speak.

Since: V4.5.0

Parameters

speakers	The array that contains the information about user IDs and volumes. For more information, see `NERtcAudioVolumeInfo`.
totalVolume	The volume of the mixing audio. Value range: 0 to 100.

The documentation for this protocol was generated from the following file:

exportHeaders/NERtcChannelDelegate.h

userID	The ID of a remote user.
userName	The name of the user who joins the room. The field is deprecated. Ignore the field.

Instance Methods

Detailed Description

Method Documentation

◆ onLocalAudioVolumeIndication:

◆ onLocalAudioVolumeIndication:withVad:

◆ onNERtcChannelConnectionStateChangeWithState:reason:

◆ onNERtcChannelDidClientRoleChanged:newRole:

◆ onNERtcChannelDidDisconnectWithReason:

◆ onNERtcChannelDidError:

◆ onNERtcChannelDidLeaveChannelWithResult:

◆ onNERtcChannelDidReceiveChannelMediaRelayEvent:channelName:error:

◆ onNERtcChannelDidWarning:msg:

◆ onNERtcChannelFirstAudioDataDidReceiveWithUserID:

◆ onNERtcChannelFirstAudioFrameDecoded:

◆ onNERtcChannelFirstVideoDataDidReceiveWithUserID:

◆ onNERtcChannelFirstVideoFrameDecoded:width:height:

◆ onNERtcChannelLiveStreamState:taskID:url:

◆ onNERtcChannelLocalPublishFallbackToAudioOnly:streamType:

◆ onNERtcChannelMediaRelayStateDidChange:channelName:

◆ onNERtcChannelMediaRightChangeWithAudio:video:

◆ onNERtcChannelReconnectingStart

◆ onNERtcChannelRecvSEIMsg:message:

◆ onNERtcChannelRejoinChannel:

◆ onNERtcChannelRemoteSubscribeFallbackToAudioOnly:isFallback:streamType:

◆ onNERtcChannelUser:audioMuted:

◆ onNERtcChannelUser:subStreamAudioMuted:

◆ onNERtcChannelUser:videoMuted:

◆ onNERtcChannelUserAudioDidStart:

◆ onNERtcChannelUserAudioDidStop:

◆ onNERtcChannelUserDidJoinWithUserID:userName:

◆ onNERtcChannelUserDidLeaveWithUserID:reason:

◆ onNERtcChannelUserSubStreamAudioDidStart:

◆ onNERtcChannelUserSubStreamAudioDidStop:

◆ onNERtcChannelUserSubStreamDidStartWithUserID:subStreamProfile:

◆ onNERtcChannelUserSubStreamDidStop:

◆ onNERtcChannelUserVideoDidStartWithUserID:videoProfile:

◆ onNERtcChannelUserVideoDidStop:

◆ onRemoteAudioVolumeIndication:totalVolume: