Occurs when the first local video frame is displayed/rendered on the local video view. @param width Width (px) of the first local video frame.

Occurs when the first video frame is published. * * @since v3.1.0 * * The SDK triggers this callback under one of the following ci

Occurs when the SDK decodes the first remote audio frame for playback. This callback is triggered in either of the following scenarios: -

Occurs when the engine receives the first audio frame from a specific remote user. @param uid User ID of the remote user. @param elapsed Time

Occurs when the first remote video frame is received and decoded. * * @deprecated * This callback is deprecated and replaced by the

Occurs when the first remote video frame is rendered. The SDK triggers this callback when the first frame of the remote video is displayed in the

Reports the result of the \ref ar::rtm::IRtmService::getChannelAttributes "getChannelAttributes" or \ref ar::rtm::IRtmService::getChannelAttributesByK

Reports the result of the \ref ar::rtm::IRtmService::getChannelMemberCount "getChannelMemberCount" method call. @param requestId The unique ID

Returns the result of the \ref ar::rtm::IChannel::getMembers "getMembers" method call. When the method call succeeds, the SDK returns t

Reports the result of the \ref ar::rtm::IRtmService::getUserAttributes "getUserAttributes" or \ref ar::rtm::IRtmService::getUserAttributesByKeys "getU

Reports the result of the \ref ar::rtm::IRtmService::createImageMessageByUploading "createImageMessageByUploading" method call. @param request

Occurs when receiving a channel image message. @param userId The message sender. @param message The received channel image

Occurs when receiving a peer-to-peer image message. @param peerId The ID of the message sender. @param message The received peer

Occurs when a user joins a channel. This callback notifies the application that a user joins a specified channel when the application calls the

Occurs when failing to join a channel. The local user receives this callback when the \ref ar::rtm::IChannel::join "join" method call fails.

For ARM::IChannelEventHandler

Occurs when successfully joining a channel. When the local user calls the \ref ar::rtm::IChannel::join "join" method and successfully joins th

Reports the last-mile network probe result. The SDK triggers this callback within 30 seconds after the app calls the \ref ar::rtc::IRtcEngine::st

Reports the last mile network quality of the local user once every two seconds before the user joins the channel. Last mile refers to the connec

Returns the result of the \ref ar::rtm::IChannel::leave "leave" method call. @param errorCode The error code. See #LEAVE_CHANNEL_ERR.

Occurs when a user leaves the channel. This callback notifies the application that a user leaves the channel when the application calls the \ref

Occurs when the local audio state changes. * * This callback indicates the state change of the local audio stream, * including the stat

Reports the statistics of the local audio stream. * * The SDK triggers this callback once every two seconds. * * @param stats The

Callback to the caller: occurs when the callee accepts the call invitation. @param localInvitation An ILocalCallInvitation object. @para

Callback to the caller: occurs when the caller cancels a call invitation. @param localInvitation An ILocalCallInvitation object. */

Callback to the caller: occurs when the life cycle of the outgoing call invitation ends in failure. @param localInvitation An ILocalCallInvi

For ARM::IRtmCallEventHandler

Callback to the caller: occurs when the callee receives the call invitation. @param localInvitation An ILocalCallInvitation object. */

Callback to the caller: occurs when the callee refuses the call invitation. @param localInvitation An ILocalCallInvitation object. @par

Occurs when the locally published media stream falls back to an audio-only stream due to poor network conditions or switches back to the video after t

Occurs when the local user successfully registers a user account by calling the \ref ar::rtc::IRtcEngine::registerLocalUserAccount "registerLocalUserA

Occurs when the local video stream state changes. This callback indicates the state of the local video stream, including camera capturing and vi

Reports the statistics of the local video stream. * * The SDK triggers this callback once every two seconds for each * user/host. If th

Occurs when a user fails to log in the AR RTM system. The local user receives this callback when the \ref ar::rtm::IRtmService::login "login"

For ARM::IRtmServiceEventHandler

For ARM::IRtmServiceEventHandler

For ARM::IRtmServiceEventHandler

Occurs when a user logs in the AR RTM system. The local user receives this callback when the \ref ar::rtm::IRtmService::login "login" method c

Occurs when a user logs out of the AR RTM system. The local user receives this callback when the SDK calls the \ref ar::rtm::IRtmService::logo

Reports the result of the \ref ar::rtm::IRtmService::cancelMediaDownload "cancelMediaDownload" or \ref ar::rtm::IRtmService::cancelMediaUpload "cancel

Reports the result of the \ref ar::rtm::IRtmService::downloadMediaToFile "downloadMediaToFile" method call. @param requestId The unique I

Reports the result of the \ref ar::rtm::IRtmService::downloadMediaToMemory "downloadMediaToMemory" method call. @note The SDK releases

Reports the progress of an ongoing download task. @note - If the download task is ongoing, the SDK returns this callback once ev

Occurs when the media engine loads.*/

Occurs when the media engine call starts.*/

Reports the progress of an ongoing upload task. @note - If the upload task is ongoing, the SDK returns this callback once every

Occurs when the number of the channel members changes, and returns the new number. @note - When the number of channel members ≤ 512

Occurs when a remote user joins the channel. When a remote user calls the \ref ar::rtm::IChannel::join "join" method and receives the \ref ar:

Occurs when a remote member leaves the channel. When a remote member in the channel calls the \ref ar::rtm::IChannel::leave "leave" method and

Occurs when receiving a channel message. @param userId The message sender. @param message The received channel message. See \ref ar::rt

Occurs when receiving a peer-to-peer message. @param peerId The ID of the message sender. @param message The received peer-to-peer mess

DEPRECATED** Occurs when the microphone is enabled/disabled. * * The \ref onMicrophoneEnabled() "onMicrophoneEnabled" callback is * dep

Reports the last mile network quality of each user in the channel once every two seconds. Last mile refers to the connection between the local d

Occurs when the local network type changes. When the network connection is interrupted, this callback indicates whether the interruption is caused b

Occurs when the online status of the peers, to whom you subscribe, changes. - When the subscription to the online status of specified p

Gets the before-mixing playback audio frame from multiple channels. After you successfully register the audio frame observer, if you set the return

Occurs each time the SDK receives a video frame before encoding. * * After you successfully register the video frame observer, the SDK triggers

Returns the result of the \ref ar::rtm::IRtmService::queryPeersBySubscriptionOption "queryPeersBySubscriptionOption" method call. @param reque

Reports the result of the \ref ar::rtm::IRtmService::queryPeersOnlineStatus "queryPeersOnlineStatus" method call. @param requestId The unique

Occurs when a user rejoins the channel after disconnection due to network problems. When a user loses connection with the server because of netwo

Occurs when a remote user starts audio mixing. When a remote user calls \ref IRtcEngine::startAudioMixing "startAudioMixing" to play the backgro

Occurs when a remote user finishes audio mixing. */

Occurs when the remote audio state changes. * * This callback indicates the state change of the remote audio stream. * * @param ui

Reports the statistics of the audio stream from each remote user/host. This callback replaces the \ref ar::rtc::IRtcEngineEventHandler::onAudioQ

Reports the transport-layer statistics of each remote audio stream. * * @deprecated * This callback is deprecated and replaced by the

Callback to the callee: occurs when the callee accepts a call invitation. @param remoteInvitation An IRemoteCallInvitation object.

Callback to the callee: occurs when the caller cancels the call invitation. @param remoteInvitation An IRemoteCallInvitation object. */

Callback to the callee: occurs when the life cycle of the incoming call invitation ends in failure. @param remoteInvitation An IRemoteCallInv

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Callback to the callee: occurs when the callee receives a call invitation. @param remoteInvitation An IRemoteCallInvitation object. */

For ARM::IRtmCallEventHandler

Callback for the callee: occurs when the callee refuses a call invitation. @param remoteInvitation An IRemoteCallInvitation object.

Occurs when the remote media stream falls back to audio-only stream * due to poor network conditions or switches back to the video stream *

Occurs when the remote video state changes. * * @param uid ID of the remote user whose video state changes. * @param state State of the

Reports the statistics of the video stream from each remote user/host. * * The SDK triggers this callback once every two seconds for each re

Reports the transport-layer statistics of each remote video stream. * * @deprecated * This callback is deprecated and replaced by the

Gets the video frame from multiple channels. After you successfully register the video frame observer, if you set the return value of isMultipl

Reports the result of the \ref ar::rtm::IRtmService::renewToken "renewToken" method call. @param token Your new token. @param er

Occurs when the token expires. After a token is specified by calling the \ref IRtcEngine::joinChannel "joinChannel" method, if the SDK losses co