\todo Optimization with custom double-to-string converter.

///////////////////////////////////////////////////////////////// Construction/Destruction ///////////////////////////////////////////////////////////

Adjusts the volume of specified audio effect for local playback.. Call this method when you are in a channel. @param soundId ID of the audio eff

Adjusts the volume of specified audio effect for publishing (sending to other users). Call this method when you are in a channel. @param soundId

Retrieves the playback position (ms) of specified audio effect. Call this method when you are in a channel. @param soundId ID of the audio effect.

Retrieves the duration (ms) of specified audio effect. Call this method when you are in a channel. @param soundId ID of the audio effect. Each a

Retrieves the volume of specified audio effect for local playback. Call this method when you are in a channel. @param soundId ID of the audio ef

Retrieves the volume of specified audio effect for publishing (sending to other users). Call this method when you are in a channel. @param sound

@cond

Occurs each time the SDK receives a video frame and prompts you whether or not to mirror the captured video. * * The SDK does not mirror the ca

* Sets the frame position for the video observer. * @since v3.0.1 * * After you successfully register the video observer, the SDK triggers th

Occurs each time the SDK receives a video frame and prompts you whether or not to rotate the captured video according to the rotation member in the Vi

Sets whether to output the acquired video frame smoothly. If you want the video frames acquired from \ref IVideoFrameObserver::onRenderVideoFrame

Occurs each time the SDK receives a video frame and prompts you to set the video format. * * YUV420 is the default video format. If you want to

Determines whether to receive audio data from multiple channels. @since v3.0.1 After you register the audio frame observer, the SDK triggers t

Determines whether to receive video data from multiple channels. After you register the video frame observer, the SDK triggers this callback ev

Occurs when the most active speaker is detected. After a successful call of \ref IRtcEngine::enableAudioVolumeIndication(int, int, bool) "enable

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

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

Occurs when a method is executed by the SDK. @param err The error code (#ERROR_CODE_TYPE) returned by the SDK when a method call fails. If the S

Occurs when channel attributes are updated, and returns all attributes of the channel. @note This callback is enabled only when the us

Occurs when the audio device state changes. This callback notifies the application that the system's audio device state is changed. For example,

Occurs when the volume of the playback device, microphone, or application changes. @param deviceType Device type: #MEDIA_DEVICE_TYPE. @para

Occurs when the local audio effect playback finishes. The SDK triggers this callback when the local audio effect file playback finishes. @

Occurs when the audio mixing file playback finishes. **DEPRECATED** use onAudioMixingStateChanged instead. You can start an audio mixing

Occurs when the state of the local user's audio mixing file changes. When you call the \ref IRtcEngine::startAudioMixing "startAudioMixing" meth

Occurs when the audio publishing state changes. * * @since v3.1.0 * * This callback indicates the publishing state change of the l

DEPRECATED** Reports the statistics of the audio stream from each remote user/host. Deprecated as of v2.3.2. Use the \ref ar::rtc::IRtcEngineEven

Occurs when the local audio route changes. The SDK triggers this callback when the local audio route switches to an earpiece, speakerphone, head

Occurs when the audio subscribing state changes. * * @since v3.1.0 * * This callback indicates the subscribing state change of a r

Reports which users are speaking, the speakers' volume and whether the local user is speaking. This callback reports the IDs and volumes of the

Occurs when the camera exposure area changes. The SDK triggers this callback when the local user changes the camera exposure position by calling

Occurs when the camera focus area changes. The SDK triggers this callback when the local user changes the camera focus position by calling the s

DEPRECATED** Occurs when the camera turns on and is ready to capture the video. If the camera fails to turn on, fix the error reported in the \r

Reports events during the media stream relay. * * @param code The event code in #CHANNEL_MEDIA_RELAY_EVENT. */

Occurs when the state of the media stream relay changes. * * The SDK returns the state of the current media relay with any error * mess

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

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

Occurs when the user role switches in a live broadcast. For example, from a host to an audience or vice versa. This callback notifies the applica

DEPRECATED** Deprecated as of v2.3.2. Replaced by the \ref ar::rtc::IRtcEngineEventHandler::onConnectionStateChanged "onConnectionStateChanged(CONNECT

DEPRECATED** Occurs when the connection between the SDK and the server is interrupted. Deprecated as of v2.3.2. Replaced by the \ref ar::rtc::IR

Occurs when the SDK cannot reconnect to AR's edge server 10 seconds after its connection to the server is interrupted. The SDK triggers this call

Occurs when the connection state between the SDK and the server changes. @param state See #CONNECTION_STATE_TYPE. @param reason See #CONNEC

Occurs when the connection state changes between the SDK and the AR RTM system. @param state The new connection state. See #CONNECTION_STATE.

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

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

Occurs each time the SDK receives a video encoded data after encoding. * * After you successfully register the video frame observer, the SDK trig

Reports an error during SDK runtime. In most cases, the SDK cannot fix the issue and resume running. The SDK requires the application to take ac

* Reports the face detection result of the local user. Applies to Android and iOS only. * @since v3.0.1 * * Once you enable face detect

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

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

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

Occurs when the engine sends the first local audio frame. @deprecated Deprecated as of v3.1.0. Use the \ref IRtcEngineEventHandler::onFirstLocal

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