| Method | Description |
| getVersion | Gets the SDK version. |
| errToStr | Converts an error code to a string. |
| licenseGenCredential | Generates a credential, which is a unique device identifier. |
| licenseVerify | Authenticates the SDK license. |
| init | Initializes the SDK. |
| setLogLevel | Sets the log level. |
| createConnection | Creates a connection. |
| destroyConnection | Destroys a connection. |
| configLog | Configures the log file. |
| joinChannel | Joins an RTC channel corresponding to a specified connection. |
| renewToken | Renews an RTC token for one or multiple channels corresponding to a connection. |
| sendAudioData | Sends an audio frame to one or multiple channels corresponding to a connection. |
| sendVideoData | Sends a video frame to one or multiple channels corresponding to a connection. |
| muteLocalAudio | Enables/disables sending local audio data to one or multiple channels corresponding to a connection. |
| muteRemoteAudio | Enables/disables receiving remote audio data from one or multiple channels corresponding to a connection. |
| muteLocalVideo | Enables/disables sending local video data to one or multiple channels corresponding to a connection. |
| muteRemoteVideo | Enables/disables receiving remote video data from one or multiple channels corresponding to a connection. |
| requestVideoKeyFrame | Requests a keyframe from a remote user in one or multiple channels corresponding to a connection. |
| setBweParam | Sets network bandwidth estimation (BWE) parameters. |
| leaveChannel | Leaves an RTC channel corresponding to a specified connection. |
| fini | Releases all resources allocated by the SDK. |
| loginRtm | Logs into RTM. |
| logoutRtm | Logs out of RTM. |
| sendRtm | Sends an RTM message. |
| setParams | Provides technical preview functionalities or special customizations by configuring the SDK with JSON options. |
| Callback | Description |
| onJoinChannelSuccess | Occurs when the local user joins an RTC channel successfully. |
| onConnectionLost | Occurs when the local user disconnects from an RTC channel. |
| onRejoinChannelSuccess | Occurs when the local user rejoins an RTC channel successfully. |
| onError | Occurs when the SDK reports an error. |
| onUserJoined | Occurs when a remote user joins an RTC channel successfully. |
| onUserOffline | Occurs when a remote user leaves an RTC channel. |
| onUserMuteAudio | Occurs when a remote user enables/disables sending audio. |
| onUserMuteVideo | Occurs when a remote user enables/disables sending video. |
| onKeyFrameGenReq | Occurs when a remote user requests a keyframe. |
| onAudioData | Occurs when receiving the audio frame of a remote user in the channel. |
| onVideoData | Occurs when receiving the video frame of a remote user in the channel. |
| onMixedAudioData | Occurs when receiving the mixed audio frame of local and remote users. This callback occurs every 20 ms. |
| onTargetBitrateChanged | Occurs when network bandwidth change is detected. Use this callback to adjust your bitrate. |
| onTokenPrivilegeWillExpire | Occurs when the RTC token expires in 30 seconds. |
| onRtmData | Occurs when the local user receives an RTM message. |
| onRtmEvent | Occurs when an RTM event occurs. |
| onSendRtmDataResult | Reports the result of the sendRtm method call. |
