IRtcEngineEventHandler
The SDK uses the IRtcEngineEventHandler interface to send event notifications to your app. Your app can get those notifications through methods that inherit this interface.
All methods in this interface have default (empty) implementation. You can choose to inherit events related to your app scenario.
- In the callbacks, avoid implementing time-consuming tasks or calling APIs that may cause thread blocking (such as
sendMessage
). Otherwise, the SDK may not work properly. - The SDK no longer catches exceptions in the code logic that developers implement themselves in IRtcEngineEventHandler class. You need to handle this exception yourself, otherwise the app may crash when the exception occurs.
FOnActiveSpeaker
Occurs when the most active remote speaker is detected.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnActiveSpeaker, int64, userId);
After a successful call of EnableAudioVolumeIndication, the SDK continuously detects which remote user has the loudest volume. During the current period, the remote user whose volume is detected as the loudest for the most times, is the most active user.
- If the most active remote speaker is always the same user, the SDK triggers the FOnActiveSpeaker callback only once.
- If the most active remote speaker changes to another user, the SDK triggers this callback again and reports the uid of the new active remote speaker.
Parameters
- userId
- The user ID of the most active speaker.
FOnAudioDeviceStateChanged
Occurs when the audio device state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnAudioDeviceStateChanged, FString, deviceId, int, deviceType, int, deviceState);
This callback notifies the application that the system's audio device state is changed. For example, a headset is unplugged from the device.
Parameters
- deviceId
- The device ID.
- deviceType
- The device type. See EENUMCUSTOM_MEDIA_DEVICE_TYPE.
- deviceState
- The device state. See MEDIA_DEVICE_STATE_TYPE.
FOnAudioDeviceVolumeChanged
Reports the volume change of the audio device or app.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnAudioDeviceVolumeChanged, FENUMWRAP_MEDIA_DEVICE_TYPE, deviceType, int, volume, bool, muted);
Occurs when the volume on the playback device, audio capture device, or the volume of the app changes.
Parameters
- deviceType
- The device type. See EENUMCUSTOM_MEDIA_DEVICE_TYPE.
- volume
- The volume value. The range is [0, 255].
- muted
-
Whether the audio device is muted:
true
: The audio device is muted.false
: The audio device is not muted.
FOnAudioEffectFinished
Occurs when the playback of the local music file finishes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnAudioEffectFinished, int, soundId);
This callback occurs when the local audio effect file finishes playing.
Parameters
- soundId
- The ID of the audio effect. The ID of each audio effect file is unique.
FOnAudioMixingFinished
Occurs when the playback of the local music file finishes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnAudioMixingFinished);
- Deprecated:
- Use FOnAudioMixingStateChanged instead.
After you call StartAudioMixing to play a local music file, this callback occurs when the playback finishes. If the call of StartAudioMixing fails, the error code WARN_AUDIO_MIXING_OPEN_ERROR is returned.
FOnAudioMixingStateChanged
Occurs when the playback state of the music file changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnAudioMixingStateChanged, FENUMWRAP_AUDIO_MIXING_STATE_TYPE, state, FENUMWRAP_AUDIO_MIXING_REASON_TYPE, reason);
This callback occurs when the playback state of the music file changes, and reports the current state and error code.
Parameters
- state
- The playback state of the music file. See EENUMCUSTOM_AUDIO_MIXING_STATE_TYPE.
- reason
- Error code. See EENUMCUSTOM_AUDIO_MIXING_REASON_TYPE.
FOnAudioPublishStateChanged
Occurs when the audio publishing state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnAudioPublishStateChanged, FString, channel, ESTREAM_PUBLISH_STATE, oldState, ESTREAM_PUBLISH_STATE, newState, int, elapseSinceLastState);
Parameters
- channel
- The channel name.
- oldState
- The previous publishing state. See ESTREAM_PUBLISH_STATE.
- newState
- The current publishing stat. See ESTREAM_PUBLISH_STATE.
- elapseSinceLastState
- The time elapsed (ms) from the previous state to the current state.
FOnAudioQuality
Reports the statistics of the audio stream sent by each remote user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnAudioQuality, int64, uid, int, quality, int, delay, int, lost);
- Deprecated:
- Use FOnRemoteAudioStats instead.
The SDK triggers this callback once every two seconds to report the audio quality of each remote user who is sending an audio stream. If a channel has multiple users sending audio streams, the SDK triggers this callback as many times.
Parameters
- uid
- The user ID of the remote user sending the audio stream.
- quality
- Audio quality of the user.
- QUALITY_UNKNOWN(0): The quality is unknown.
- QUALITY_EXCELLENT(1): The quality is excellent.
- QUALITY_GOOD(2): The network quality seems excellent, but the bitrate can be slightly lower than excellent.
- QUALITY_POOR(3): Users can feel the communication is slightly impaired.
- QUALITY_BAD(4): Users cannot communicate smoothly.
- QUALITY_VBAD(5): The quality is so bad that users can barely communicate.
- QUALITY_DOWN(6): The network is down, and users cannot communicate at all.
- delay
- The network delay (ms) from the sender to the receiver, including the delay caused by audio sampling pre-processing, network transmission, and network jitter buffering.
- lost
- The packet loss rate (%) of the audio packet sent from the remote user to the receiver.
FOnAudioRoutingChanged
Occurs when the local audio route changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnAudioRoutingChanged, int, routing);
This method is for Android, iOS and macOS only.
Parameters
- routing
-
The current audio routing.
- ROUTE_DEFAULT(-1): The default audio route.
- ROUTE_HEADSET(0): The audio route is a headset with a microphone.
- ROUTE_EARPIECE(1): The audio route is an earpiece.
- ROUTE_HEADSETNOMIC(2): The audio route is a headset without a microphone.
- ROUTE_SPEAKERPHONE(3): The audio route is the speaker that comes with the device.
- ROUTE_LOUDSPEAKER(4): (For future use) The audio route is an external speaker.
- (5): The audio route is a Bluetooth device using the HFP protocol.
- (10): The audio route is a Bluetooth device using the A2DP protocol..
FOnAudioSubscribeStateChanged
Occurs when the audio subscribing state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnAudioSubscribeStateChanged, FString, channel, int64, uid, ESTREAM_SUBSCRIBE_STATE, oldState, ESTREAM_SUBSCRIBE_STATE, newState, int, elapseSinceLastState);
Parameters
- channel
- The channel name.
- uid
- The user ID of the remote user.
- oldState
- The previous subscribing status. See ESTREAM_SUBSCRIBE_STATE.
- newState
- The current subscribing status. See ESTREAM_SUBSCRIBE_STATE.
- elapseSinceLastState
- The time elapsed (ms) from the previous state to the current state.
FOnAudioVolumeIndication
Reports the volume information of users.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnAudioVolumeIndication, const TArray<FAudioVolumeInfo>&, speakers, int, totalVolume);
By default, this callback is disabled. You can enable it by calling EnableAudioVolumeIndication. Once this callback is enabled and users send streams in the channel, the SDK triggers the FOnAudioVolumeIndication callback according to the time interval set in EnableAudioVolumeIndication. The SDK triggers two independent FOnAudioVolumeIndication callbacks simultaneously, which separately report the volume information of the local user who sends a stream and the remote users (up to three) whose instantaneous volume is the highest.
Once this callback is enabled, if the local user calls the MuteLocalAudioStream method to mute, the SDK continues to report the volume indication of the local user.
If a remote user whose volume is one of the three highest in the channel stops publishing the audio stream for 20 seconds, the callback excludes this user's information; if all remote users stop publishing audio streams for 20 seconds, the SDK stops triggering the callback for remote users.
Parameters
- speakers
- The volume information of the users. See FAudioVolumeInfo. An empty speakers array in the callback indicates that no remote user is in the channel or is sending a stream.
- totalVolume
-
The volume of the speaker. The value range is [0,255].
- In the callback for the local user, totalVolume is the volume of the local user who sends a stream.
- In the callback for remote users, totalVolume is the sum of the volume of all remote users (up to three) whose instantaneous volume is the highest. If the user calls StartAudioMixing, then totalVolume is the volume after audio mixing.
FOnCameraExposureAreaChanged
Occurs when the camera exposure area changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnCameraExposureAreaChanged, int, x, int, y, int, width, int, height);
The SDK triggers this callback when the local user changes the camera exposure position by calling SetCameraExposurePosition.
Parameters
- x
- The x coordinate of the changed camera exposure area.
- y
- The y coordinate of the changed camera exposure area.
- width
- The width of the changed camera exposure area.
- height
- The height of the changed exposure area.
FOnCameraFocusAreaChanged
Occurs when the camera focus area changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnCameraFocusAreaChanged, int, x, int, y, int, width, int, height);
Parameters
- x
- The x-coordinate of the changed camera focus area.
- y
- The y-coordinate of the changed camera focus area.
- width
- The width of the changed camera focus area.
- height
- The height of the changed camera focus area.
FOnCameraReady
Occurs when the camera turns on and is ready to capture the video.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnCameraReady);
- Deprecated:
-
Use LOCAL_VIDEO_STREAM_STATE_CAPTURING(1) in FOnLocalVideoStateChanged instead.
This callback indicates that the camera has been successfully turned on and you can start to capture video.
FOnChannelMediaRelayEvent
Reports events during the media stream relay.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnChannelMediaRelayEvent, int, code);
- Deprecated:
- This callback is deprecated.
Parameters
- code
-
The event code of channel media relay:
- RELAY_EVENT_NETWORK_DISCONNECTED(0): The user disconnects from the server due to a poor network connection.
- RELAY_EVENT_NETWORK_CONNECTED(1): The user is connected to the server.
- RELAY_EVENT_PACKET_JOINED_SRC_CHANNEL(2): The user joins the source channel.
- RELAY_EVENT_PACKET_JOINED_DEST_CHANNEL(3): The user joins the target channell.
- RELAY_EVENT_PACKET_SENT_TO_DEST_CHANNEL(4): The SDK starts relaying the media stream to the target channel.
- RELAY_EVENT_PACKET_RECEIVED_VIDEO_FROM_SRC(5): The server receives the video stream from the source channel.
- RELAY_EVENT_PACKET_RECEIVED_AUDIO_FROM_SRC(6): The server receives the audio stream from the source channel.
- RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL(7): The target channel is updated.
- RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_NOT_CHANGE(9): The target channel does not change, which means that the target channel fails to be updated.
- RELAY_EVENT_PACKET_UPDATE_DEST_CHANNEL_IS_NULL(10): The target channel name is
NULL
. - RELAY_EVENT_VIDEO_PROFILE_UPDATE(11): The video profile is sent to the server.
- RELAY_EVENT_PAUSE_SEND_PACKET_TO_DEST_CHANNEL_SUCCESS(12): The SDK successfully pauses relaying the media stream to target channels.
- RELAY_EVENT_PAUSE_SEND_PACKET_TO_DEST_CHANNEL_FAILED(13): The SDK fails to pause relaying the media stream to target channels.
- RELAY_EVENT_RESUME_SEND_PACKET_TO_DEST_CHANNEL_SUCCESS(14): The SDK successfully resumes relaying the media stream to target channels.
- RELAY_EVENT_RESUME_SEND_PACKET_TO_DEST_CHANNEL_FAILED(15): The SDK fails to resume relaying the media stream to target channels.
FOnChannelMediaRelayStateChanged
Occurs when the state of the media stream relay changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnChannelMediaRelayStateChanged, int, state, int, code);
The SDK returns the state of the current media relay with any error message.
Parameters
- state
-
The state code:
- RELAY_STATE_IDLE(0): The SDK is initializing.
- RELAY_STATE_CONNECTING(1): The SDK tries to relay the media stream to the destination channel.
- RELAY_STATE_RUNNING(2): The SDK successfully relays the media stream to the destination channel.
- RELAY_STATE_FAILURE(3): An error occurs. See code for the error code.
- code
-
The error code of the channel media relay.
- RELAY_OK(0): Everything is normal.
- RELAY_ERROR_SERVER_ERROR_RESPONSE(1): An error occurs in the server response.
- RELAY_ERROR_SERVER_NO_RESPONSE(2): No server response. This error may be caused by poor network connections. If this error occurs when initiating a channel media relay, you can try again later; if this error occurs during channel media relay, you can call LeaveChannel to leave the channel. This error can also occur if the channel media relay service is not enabled in the project. You can contact technical support to enable the service.
- RELAY_ERROR_NO_RESOURCE_AVAILABLE(3): The SDK fails to access the service, probably due to limited resources of the server.
- RELAY_ERROR_FAILED_JOIN_SRC4: The server fails to send the relay request.
- RELAY_ERROR_FAILED_JOIN_DEST5: The server fails to accept the relay request.
- RELAY_ERROR_FAILED_PACKET_RECEIVED_FROM_SRC6: The server fails to receive the media stream.
- RELAY_ERROR_FAILED_PACKET_SENT_TO_DEST7: The server fails to send the media stream.
- RELAY_ERROR_SERVER_CONNECTION_LOST(8): The SDK disconnects from the server due to poor network connections. You can call LeaveChannel to leave the channel.
- RELAY_ERROR_INTERNAL_ERROR(9): An internal error occurs in the server.
- RELAY_ERROR_SRC_TOKEN_EXPIRED(10): The token of the source channel has expired.
- RELAY_ERROR_DEST_TOKEN_EXPIRED(11): The token of the destination channel has expired.
FOnClientRoleChanged
Occurs when the user role or the audience latency level changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnClientRoleChanged, ECLIENT_ROLE_TYPE, oldRole, ECLIENT_ROLE_TYPE, newRole, FClientRoleOptions, roleoption);
Trigger timing
- Calling SetClientRole to set the user role or audience latency level after joining a channel.
- Calling SetClientRole to set the user role to AUDIENCE before joining a channel.
Restrictions
This callback will not be triggered when you call setClientRole [1/2] or SetClientRole and set the user role to BROADCASTER before joining a channel.
Parameters
- oldRole
- Role that the user switches from: ECLIENT_ROLE_TYPE.
- newRole
- Role that the user switches to: ECLIENT_ROLE_TYPE.
- newRoleOptions
-
Properties of the role that the user switches to. See FClientRoleOptions.
FOnClientRoleChangeFailed
Occurs when switching a user role fails.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnClientRoleChangeFailed, ECLIENT_ROLE_CHANGE_FAILED_REASON, reason, ECLIENT_ROLE_TYPE, currentRole);
This callback informs you about the reason for failing to switching and your current user role.
Trigger timing
The SDK triggers this callback when the local user calls SetClientRole after joining a channel to switch the user role but the switching fails.
Restrictions
None.
Parameters
- reason
- The reason for a user role switch failure. See ECLIENT_ROLE_CHANGE_FAILED_REASON.
- currentRole
- Current user role. See ECLIENT_ROLE_TYPE.
FOnConnectionBanned
Occurs when the connection is banned by the Agora server.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnConnectionBanned);
- Deprecated:
- Use FOnConnectionStateChanged instead.
FOnConnectionInterrupted
Occurs when the connection between the SDK and the server is interrupted.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnConnectionInterrupted);
- Deprecated:
- Use FOnConnectionStateChanged instead.
- The SDK triggers the FOnConnectionInterrupted callback when it loses connection with the server for more than four seconds after it successfully joins the channel.
- The SDK triggers the FOnConnectionLost callback when it loses connection with the server for more than 10 seconds, whether or not it joins the channel.
FOnConnectionLost
Occurs when the SDK cannot reconnect to Agora's edge server 10 seconds after its connection to the server is interrupted.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnConnectionLost);
The SDK triggers this callback when it cannot connect to the server 10 seconds after calling the JoinChannel method, regardless of whether it is in the channel. If the SDK fails to rejoin the channel 20 minutes after being disconnected from Agora's edge server, the SDK stops rejoining the channel.
FOnConnectionStateChanged
Occurs when the network connection state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnConnectionStateChanged, ECONNECTION_STATE_TYPE, state, ECONNECTION_CHANGED_REASON_TYPE, reason);
When the network connection state changes, the SDK triggers this callback and reports the current connection state and the reason for the change.
Parameters
- state
-
The current connection state. See ECONNECTION_STATE_TYPE.
- reason
-
The reason for a connection state change. See ECONNECTION_CHANGED_REASON_TYPE.
FOnEncryptionError
Reports the built-in encryption errors.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnEncryptionError, EENCRYPTION_ERROR_TYPE, errorType);
When encryption is enabled by calling EnableEncryption, the SDK triggers this callback if an error occurs in encryption or decryption on the sender or the receiver side.
Parameters
- errorType
- Details about the error type. See EENCRYPTION_ERROR_TYPE.
FOnError
Reports an error during SDK runtime.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnError, int, err, FString, msg);
This callback indicates that an error (concerning network or media) occurs 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 about the issue.
Parameters
- msg
- The error message.
- err
- Error code.
FOnExtensionError
Occurs when the extension runs incorrectly.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnExtensionError, FString, provider, FString, extension, int, error, FString, message);
In case of extension enabling failure or runtime errors, the extension triggers this callback and reports the error code along with the reasons.
Parameters
- provider
- The name of the extension provider.
- extension
- The name of the extension.
- error
- Error code. For details, see the extension documentation provided by the extension provider.
- message
- Reason. For details, see the extension documentation provided by the extension provider.
FOnExtensionEvent
The event callback of the extension.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnExtensionEvent, FString, provider, FString, extension, FString, key, FString, value);
To listen for events while the extension is running, you need to register this callback.
Parameters
- provider
- The name of the extension provider.
- extension
- The name of the extension.
- key
- The key of the extension.
- value
- The value of the extension key.
FOnExtensionStarted
Occurs when the extension is enabled.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnExtensionStarted, FString, provider, FString, extension);
The extension triggers this callback after it is successfully enabled.
Parameters
- provider
- The name of the extension provider.
- extension
- The name of the extension.
FOnExtensionStopped
Occurs when the extension is disabled.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnExtensionStopped, FString, provider, FString, extension);
The extension triggers this callback after it is successfully destroyed.
Parameters
- provider
- The name of the extension provider.
- extension
- The name of the extension.
FOnFacePositionChanged
Reports the face detection result of the local user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnFacePositionChanged, int, imageWidth, int, imageHeight, FRectangle, vecRectangle, TArray<int>, vecDistance, int, numFaces);
(true)
, you can get the following information on the local user in real-time:- The width and height of the local video.
- The position of the human face in the local view.
- The distance between the human face and the screen.
This value is based on the fitting calculation of the local video size and the position of the human face.
- This callback is for Android and iOS only.
- When it is detected that the face in front of the camera disappears, the callback will be triggered immediately. When no human face is detected, the frequency of this callback to be triggered wil be decreased to reduce power consumption on the local device.
- The SDK stops triggering this callback when a human face is in close proximity to the screen.
- On Android, the value of distance reported in this callback may be slightly different from the actual distance. Therefore, Agora does not recommend using it for accurate calculation.
Parameters
- imageWidth
- The width (px) of the video image captured by the local camera.
- imageHeight
- The height (px) of the video image captured by the local camera.
- vecRectangle
-
An array of numFaces, representing the detected face information:
x
: The x-coordinate (px) of the human face in the local view. Taking the top left corner of the view as the origin, the x-coordinate represents the horizontal position of the human face relative to the origin.y
: The y-coordinate (px) of the human face in the local view. Taking the top left corner of the view as the origin, the y-coordinate represents the vertical position of the human face relative to the origin.width
: The width (px) of the human face in the captured view.height
: The height (px) of the human face in the captured view.
- vecDistance
- An array of numFaces, representing the distance (cm) between a face and the device screen.
- numFaces
- The number of faces detected. If the value is 0, it means that no human face is detected.
FOnFirstLocalAudioFramePublished
Occurs when the first audio frame is published.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnFirstLocalAudioFramePublished, int, elapsed);
- The local client enables the audio module and calls JoinChannel successfully.
- The local client calls MuteLocalAudioStream(
true
) and MuteLocalAudioStream(false
) in sequence. - The local client calls DisableAudio and EnableAudio in sequence.
- The local client calls PushAudioFrame to successfully push the audio frame to the SDK.
Parameters
- elapsed
- Time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnFirstLocalVideoFrame
Occurs when the first local video frame is displayed on the local video view.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnFirstLocalVideoFrame, EVIDEO_SOURCE_TYPE, source, int, width, int, height, int, elapsed);
The SDK triggers this callback when the first local video frame is displayed on the local video view.
Parameters
- source
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- width
- The width (px) of the first local video frame.
- height
- The height (px) of the first local video frame.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel to join the channel to when the SDK triggers this callback. If StartPreview is called before joining the channel, this parameter indicates the time elapsed from calling StartPreview to when this event occurred.
FOnFirstLocalVideoFramePublished
Occurs when the first video frame is published.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnFirstLocalVideoFramePublished, EVIDEO_SOURCE_TYPE, source, int, elapsed);
- The local client enables the video module and calls JoinChannel to join the channel successfully.
- The local client calls MuteLocalVideoStream(
true
) and MuteLocalVideoStream(false
) in sequence. - The local client calls DisableVideo and EnableVideo in sequence.
- The local client calls PushVideoFrame to successfully push the video frame to the SDK.
Parameters
- source
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- elapsed
- Time elapsed (ms) from the local user calling JoinChannel until this callback is triggered.
FOnFirstRemoteAudioFrame
Occurs when the SDK receives the first audio frame from a specific remote user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnFirstRemoteAudioFrame, int64, uid, int, elapsed);
- Deprecated:
- Use FOnRemoteAudioStateChanged instead.
Parameters
- uid
- The user ID of the remote user.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnFirstRemoteAudioDecoded
Occurs when the SDK decodes the first remote audio frame for playback.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnFirstRemoteAudioDecoded, int64, uid, int, elapsed);
- Deprecated:
- Use FOnRemoteAudioStateChanged instead.
- The remote user joins the channel and sends the audio stream for the first time.
- The remote user's audio is offline and then goes online to re-send audio. It means the local user cannot receive audio in 15 seconds. Reasons for such an interruption include:
- The remote user leaves channel.
- The remote user drops offline.
- The remote user calls MuteLocalAudioStream to stop sending the audio stream.
- The remote user calls DisableAudio to disable audio.
Parameters
- uid
- The user ID of the remote user.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnFirstRemoteVideoDecoded
Occurs when the first remote video frame is received and decoded.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnFirstRemoteVideoDecoded, int64, uid, int, width, int, height, int, elapsed);
- The remote user joins the channel and sends the video stream.
- The remote user stops sending the video stream and re-sends it after 15 seconds. Reasons for such an interruption include:
- The remote user leaves the channel.
- The remote user drops offline.
- The remote user calls DisableVideo to disable video.
Parameters
- uid
- The user ID of the remote user sending the video stream.
- width
- The width (px) of the video stream.
- height
- The height (px) of the video stream.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnFirstRemoteVideoFrame
Occurs when the renderer receives the first frame of the remote video.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnFirstRemoteVideoFrame, int64, userId, int, width, int, height, int, elapsed);
Parameters
- userId
- The user ID of the remote user sending the video stream.
- width
- The width (px) of the video stream.
- height
- The height (px) of the video stream.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnJoinChannelSuccess
Occurs when a user joins a channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnJoinChannelSuccess, FString, channel, int64, uid, int, elapsed);
This callback notifies the application that a user joins a specified channel.
Parameters
- channel
- The channel name.
- uid
- The ID of the user who joins the channel.
- elapsed
- The time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnLastmileProbeResult
Reports the last mile network probe result.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnLastmileProbeResult, const FLastmileProbeResult&, result);
The SDK triggers this callback within 30 seconds after the app calls StartLastmileProbeTest.
Parameters
- result
- The uplink and downlink last-mile network probe test result. See FLastmileProbeResult.
FOnLastmileQuality
Reports the last-mile network quality of the local user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnLastmileQuality, int, quality);
This callback reports the last-mile network conditions of the local user before the user joins the channel. Last mile refers to the connection between the local device and Agora's edge server.
Before the user joins the channel, this callback is triggered by the SDK onceStartLastmileProbeTest is called and reports the last-mile network conditions of the local user.
Parameters
- quality
- The last-mile network quality.
- QUALITY_UNKNOWN(0): The quality is unknown.
- QUALITY_EXCELLENT(1): The quality is excellent.
- QUALITY_GOOD(2): The network quality seems excellent, but the bitrate can be slightly lower than excellent.
- QUALITY_POOR(3): Users can feel the communication is slightly impaired.
- QUALITY_BAD(4): Users cannot communicate smoothly.
- QUALITY_VBAD(5): The quality is so bad that users can barely communicate.
- QUALITY_DOWN(6): The network is down, and users cannot communicate at all.
FOnLeaveChannel
Occurs when a user leaves a channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnLeaveChannel, const FRtcStats&, stats);
You can obtain information such as the total duration of a call, and the data traffic that the SDK transmits and receives.
Trigger timing
The SDK triggers this callback after you call LeaveChannel or LeaveChannelEx to leave a channel.
Restrictions
None.
Parameters
- stats
- Call statistics. See FRtcStats.
FOnLocalAudioStateChanged
Occurs when the local audio stream state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnLocalAudioStateChanged, ELOCAL_AUDIO_STREAM_STATE, state, ELOCAL_AUDIO_STREAM_ERROR, error);
When the state of the local audio stream changes (including the state of the audio capture and encoding), the SDK triggers this callback to report the current state. This callback indicates the state of the local audio stream, and allows you to troubleshoot issues when audio exceptions occur.
Parameters
- state
- The state of the local audio. See ELOCAL_AUDIO_STREAM_STATE.
- reason
- Reasons for local audio state changes. See ELOCAL_AUDIO_STREAM_REASON.
FOnLocalAudioStats
Reports the statistics of the local audio stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnLocalAudioStats, const FLocalAudioStats&, stats);
The SDK triggers this callback once every two seconds.
Parameters
- stats
- Local audio statistics. See FLocalAudioStats.
FOnLocalUserRegistered
Occurs when the local user registers a user account.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnLocalUserRegistered, int64, uid, FString, userAccount);
After the local user successfully calls RegisterLocalUserAccount to register the user account or calls JoinChannelWithUserAccount to join a channel, the SDK triggers the callback and informs the local user's UID and User Account.
Parameters
- uid
- The ID of the local user.
- userAccount
- The user account of the local user.
FOnLocalVideoStateChanged
Occurs when the local video stream state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnLocalVideoStateChanged, EVIDEO_SOURCE_TYPE, source, ELOCAL_VIDEO_STREAM_STATE, state, ELOCAL_VIDEO_STREAM_ERROR, error);
When the status of the local video changes, the SDK triggers this callback to report the current local video state and the reason for the state change.
Applicable scenarios
You can use this callback to stay updated on the state changes of the local video stream, and take corresponding measures based on the reasons for the state changes, to better manage and debug issues related to the video stream.
Trigger timing
- The SDK triggeres this callback under the following circumstances, with the state as LOCAL_VIDEO_STREAM_STATE_FAILED, and the reason as
LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE
:- The app switches to the background, and the system revokes the camera resource.
- For Android 9 and later versions, after an app is in the background for a period, the system automatically revokes camera permissions.
- For Android 6 and later versions, if the camera is held by a third-party app for a certain duration and then released, the SDK triggers this callback and reports the FOnLocalVideoStateChanged(
LOCAL_VIDEO_STREAM_STATE_CAPTURING,LOCAL_VIDEO_STREAM_REASON_OK
) callback. - The camera starts normally, but does not output video frames for four consecutive seconds.
- When the camera outputs captured video frames, if the SDK detects 15 consecutive duplicate video frames, it triggers this callback, with the state as LOCAL_VIDEO_STREAM_STATE_CAPTURING and the reason as LOCAL_VIDEO_STREAM_REASON_CAPTURE_FAILURE.Note: Note that the video frame duplication detection is only available for video frames with a resolution greater than 200 Ă— 200, a frame rate greater than or equal to 10 fps, and a bitrate less than 20 Kbps.
Restrictions
For some device models, the SDK does not trigger this callback when the state of the local video changes while the local video capturing device is in use, so you have to make your own timeout judgment.
Parameters
- source
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- state
-
The state of the local video, see ELOCAL_VIDEO_STREAM_STATE.
- reason
-
The reasons for changes in local video state. See ELOCAL_VIDEO_STREAM_REASON.
FOnLocalVideoStats
Reports the statistics of the local video stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnLocalVideoStats, EVIDEO_SOURCE_TYPE, source, const FLocalVideoStats&, stats);
The SDK triggers this callback once every two seconds to report the statistics of the local video stream.
Parameters
- source
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- stats
- The statistics of the local video stream. See FLocalVideoStats.
FOnLocalVideoTranscoderError
Occurs when there's an error during the local video mixing.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnLocalVideoTranscoderError, const FTranscodingVideoStream&, stream, EVIDEO_TRANSCODER_ERROR, error);
Details
When you fail to call StartLocalVideoTranscoder or UpdateLocalTranscoderConfiguration, the SDK triggers this callback to report the reason.
Parameters
- stream
- The video streams that cannot be mixed during video mixing. See FTranscodingVideoStream.
- error
- The reason for local video mixing error. See EVIDEO_TRANSCODER_ERROR.
FOnNetworkQuality
Reports the last mile network quality of each user in the channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnNetworkQuality, int64, uid, int, txQuality, int, rxQuality);
This callback reports the last mile network conditions of each user in the channel. Last mile refers to the connection between the local device and Agora's edge server.
The SDK triggers this callback once every two seconds. If a channel includes multiple users, the SDK triggers this callback as many times.
This callback provides feedback on network quality through sending and receiving broadcast packets within the channel. Excessive broadcast packets can lead to broadcast storms. To prevent broadcast storms from causing a large amount of data transmission within the channel, this callback supports feedback on the network quality of up to 4 remote hosts simultaneously by default.
UNKNOWN
when the user is not sending a stream; rxQuality is UNKNOWN
when the user is not receiving a stream.Parameters
- uid
-
The user ID. The network quality of the user with this user ID is reported. If the uid is 0, the local network quality is reported.
- txQuality
- Uplink network quality rating of the user in terms of the transmission bit rate, packet loss rate, average RTT (Round-Trip Time) and jitter of the uplink network. This parameter is a quality rating helping you understand how well the current uplink network conditions can support the selected video encoder configuration. For example, a 1000 Kbps uplink network may be adequate for video frames with a resolution of 640 Ă— 480 and a frame rate of 15 fps in the LIVE_BROADCASTING profile, but might be inadequate for resolutions higher than 1280 Ă— 720.
- QUALITY_UNKNOWN(0): The quality is unknown.
- QUALITY_EXCELLENT(1): The quality is excellent.
- QUALITY_GOOD(2): The network quality seems excellent, but the bitrate can be slightly lower than excellent.
- QUALITY_POOR(3): Users can feel the communication is slightly impaired.
- QUALITY_BAD(4): Users cannot communicate smoothly.
- QUALITY_VBAD(5): The quality is so bad that users can barely communicate.
- QUALITY_DOWN(6): The network is down, and users cannot communicate at all.
- rxQuality
- Downlink network quality rating of the user in terms of packet loss rate, average RTT, and jitter of the downlink network.
- QUALITY_UNKNOWN(0): The quality is unknown.
- QUALITY_EXCELLENT(1): The quality is excellent.
- QUALITY_GOOD(2): The network quality seems excellent, but the bitrate can be slightly lower than excellent.
- QUALITY_POOR(3): Users can feel the communication is slightly impaired.
- QUALITY_BAD(4): Users cannot communicate smoothly.
- QUALITY_VBAD(5): The quality is so bad that users can barely communicate.
- QUALITY_DOWN(6): The network is down, and users cannot communicate at all.
FOnNetworkTypeChanged
Occurs when the local network type changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnNetworkTypeChanged, FENUMWRAP_NETWORK_TYPE, type);
This callback occurs when the connection state of the local user changes. You can get the connection state and reason for the state change in this callback. When the network connection is interrupted, this callback indicates whether the interruption is caused by a network type change or poor network conditions.
Parameters
- type
-
The type of the local network connection. See EENUMCUSTOM_NETWORK_TYPE.
FOnPermissionError
Occurs when the SDK cannot get the device permission.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnPermissionError, EPERMISSION_TYPE, permissionType);
When the SDK fails to get the device permission, the SDK triggers this callback to report which device permission cannot be got.
Parameters
- permissionType
- The type of the device permission. See EPERMISSION_TYPE.
FOnProxyConnected
Reports the proxy connection state.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnProxyConnected, FString, channel, int64, uid, EPROXY_TYPE, proxyType, FString, localProxyIp, int, elapsed);
You can use this callback to listen for the state of the SDK connecting to a proxy. For example, when a user calls SetCloudProxy and joins a channel successfully, the SDK triggers this callback to report the user ID, the proxy type connected, and the time elapsed fromthe user calling JoinChannel until this callback is triggered.
Parameters
- channel
- The channel name.
- uid
- The user ID.
- proxyType
- The proxy type connected. See EPROXY_TYPE.
- localProxyIp
- Reserved for future use.
- elapsed
- The time elapsed (ms) from the user calling JoinChannel until this callback is triggered.
FOnRejoinChannelSuccess
Occurs when a user rejoins the channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnRejoinChannelSuccess, FString, channel, int64, uid, int, elapsed);
When a user loses connection with the server because of network problems, the SDK automatically tries to reconnect and triggers this callback upon reconnection.
Parameters
- channel
- The channel name.
- uid
- The ID of the user who rejoins the channel.
- elapsed
- Time elapsed (ms) from the local user calling JoinChannel until the SDK triggers this callback.
FOnRemoteAudioStateChanged
Occurs when the remote audio state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnRemoteAudioStateChanged, int64, uid, EREMOTE_AUDIO_STATE, state, EREMOTE_AUDIO_STATE_REASON, reason, int, elapsed);
When the audio state of a remote user (in a voice/video call channel) or host (in a live streaming channel) changes, the SDK triggers this callback to report the current state of the remote audio stream.
Parameters
- uid
- The ID of the remote user whose audio state changes.
- state
- The state of the remote audio. See EREMOTE_AUDIO_STATE.
- reason
- The reason of the remote audio state change. See EREMOTE_AUDIO_STATE_REASON.
- elapsed
- Time elapsed (ms) from the local user calling the JoinChannel method until the SDK triggers this callback.
FOnRemoteAudioStats
Reports the transport-layer statistics of each remote audio stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnRemoteAudioStats, const FRemoteAudioStats&, stats);
The SDK triggers this callback once every two seconds for each remote user who is sending audio streams. If a channel includes multiple remote users, the SDK triggers this callback as many times.
Parameters
- stats
- The statistics of the received remote audio streams. See FRemoteAudioStats.
FOnRemoteAudioTransportStats
Reports the transport-layer statistics of each remote audio stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnRemoteAudioTransportStats, int64, uid, int, delay, int, lost, int, rxKBitRate);
- Deprecated:
- Use FOnRemoteAudioStats instead.
This callback reports the transport-layer statistics, such as the packet loss rate and network time delay after the local user receives an audio packet from a remote user. During a call, when the user receives the audio packet sent by the remote user, the callback is triggered every 2 seconds.
Parameters
- uid
- The ID of the remote user sending the audio streams.
- delay
- The network delay (ms) from the remote user to the receiver.
- lost
- The packet loss rate (%) of the audio packet sent from the remote user to the receiver.
- rxKBitrate
- The bitrate of the received audio (Kbps).
FOnRemoteVideoStateChanged
Occurs when the remote video stream state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnRemoteVideoStateChanged, int64, uid, EREMOTE_VIDEO_STATE, state, EREMOTE_VIDEO_STATE_REASON, reason, int, elapsed);
Parameters
- uid
- The ID of the remote user whose video state changes.
- state
-
The state of the remote video. See EREMOTE_VIDEO_STATE.
- reason
-
The reason for the remote video state change. See EREMOTE_VIDEO_STATE_REASON.
- elapsed
- Time elapsed (ms) from the local user calling the JoinChannel method until the SDK triggers this callback.
FOnRemoteVideoStats
Reports the statistics of the video stream sent by each remote users.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnRemoteVideoStats, const FRemoteVideoStats&, stats);
Reports the statistics of the video stream from the remote users. The SDK triggers this callback once every two seconds for each remote user. If a channel has multiple users/hosts sending video streams, the SDK triggers this callback as many times.
Parameters
- stats
- Statistics of the remote video stream. See FRemoteVideoStats.
FOnRemoteVideoTransportStats
Reports the transport-layer statistics of each remote video stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FourParams(FOnRemoteVideoTransportStats, int64, uid, int, delay, int, lost, int, rxKBitRate);
- Deprecated:
- This callback is deprecated. Use FOnRemoteVideoStats instead.
This callback reports the transport-layer statistics, such as the packet loss rate and network time delay after the local user receives a video packet from a remote user.
During a call, when the user receives the video packet sent by the remote user/host, the callback is triggered every 2 seconds.
Parameters
- uid
- The ID of the remote user sending the video packets.
- delay
- The network delay (ms) from the sender to the receiver.
- lost
- The packet loss rate (%) of the video packet sent from the remote user.
- rxKBitRate
- The bitrate of the received video (Kbps).
FOnRequestToken
Occurs when the token expires.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnRequestToken);
The SDK triggers this callback if the token expires.
- In scenarios involving one channel:
- Call RenewToken to pass in the new token.
- Call LeaveChannel to leave the current channel and then pass in the new token when you call JoinChannel to join a channel.
- In scenarios involving mutiple channels: Call UpdateChannelMediaOptionsEx to pass in the new token.
Restrictions
None.
FOnRhythmPlayerStateChanged
Occurs when the state of virtual metronome changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnRhythmPlayerStateChanged, FENUMWRAP_RHYTHM_PLAYER_STATE_TYPE, state, FENUMWRAP_RHYTHM_PLAYER_ERROR_TYPE, errorCode);
When the state of the virtual metronome changes, the SDK triggers this callback to report the current state of the virtual metronome. This callback indicates the state of the local audio stream and enables you to troubleshoot issues when audio exceptions occur.
Parameters
- state
- For the current virtual metronome status, see EENUMCUSTOM_RHYTHM_PLAYER_STATE_TYPE.
- errorCode
- For the error codes and error messages related to virtual metronome errors, see EENUMCUSTOM_RHYTHM_PLAYER_REASON.
FOnRtcStats
Reports the statistics about the current call.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnRtcStats, const FRtcStats&, stats);
Trigger timing
The SDK triggers this callback once every two seconds after the user joins the channel.
Restrictions
None.
Parameters
- stats
-
Statistics of the RTC engine. See FRtcStats.
FOnRtmpStreamingEvent
Reports events during the Media Push.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnRtmpStreamingEvent, FString, url, ERTMP_STREAMING_EVENT, eventCode);
Parameters
- url
- The URL for Media Push.
- eventCode
- The event code of Media Push. See ERTMP_STREAMING_EVENT.
FOnRtmpStreamingStateChanged
Occurs when the state of Media Push changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnRtmpStreamingStateChanged, FString, url, ERTMP_STREAM_PUBLISH_STATE, state, ERTMP_STREAM_PUBLISH_REASON, errCode);
When the state of Media Push changes, the SDK triggers this callback and reports the URL address and the current state of the Media Push. This callback indicates the state of the Media Push. When exceptions occur, you can troubleshoot issues by referring to the detailed error descriptions in the error code parameter.
Parameters
- url
-
The URL address where the state of the Media Push changes.
- state
- The current state of the Media Push. See ERTMP_STREAM_PUBLISH_STATE.
- reason
- Reasons for the changes in the Media Push status. See ERTMP_STREAM_PUBLISH_REASON.
FOnSnapshotTaken
Reports the result of taking a video snapshot.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnSnapshotTaken, int64, uid, FString, filePath, int, width, int, height, int, errCode);
After a successful TakeSnapshot method call, the SDK triggers this callback to report whether the snapshot is successfully taken as well as the details for the snapshot taken.
Parameters
- uid
- The user ID. One uid of 0 indicates the local user.
- filePath
- The local path of the snapshot.
- width
- The width (px) of the snapshot.
- height
- The height (px) of the snapshot.
- errCode
- The message that confirms success or gives the reason why the snapshot is not successfully taken:
- 0: Success.
- < 0: Failure:
- -1: The SDK fails to write data to a file or encode a JPEG image.
- -2: The SDK does not find the video stream of the specified user within one second after the TakeSnapshot method call succeeds. The possible reasons are: local capture stops, remote end stops publishing, or video data processing is blocked.
- -3: Calling the TakeSnapshot method too frequently.
FOnStreamMessage
Occurs when the local user receives the data stream from the remote user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnStreamMessage, int64, userId, int, streamId, FString, data, int64, length, int, sentTs);
The SDK triggers this callback when the local user receives the stream message that the remote user sends by calling the SendStreamMessage method.
Parameters
- userId
- The ID of the remote user sending the message.
- streamId
- The stream ID of the received message.
- data
- The data received.
- length
- The data length (byte).
- sentTs
- The time when the data stream is sent.
FOnStreamMessageError
Occurs when the local user does not receive the data stream from the remote user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnStreamMessageError, int64, userId, int, streamId, int, code, int, missed, int, cached);
The SDK triggers this callback when the local user fails to receive the stream message that the remote user sends by calling the SendStreamMessage method.
Parameters
- userId
- The ID of the remote user sending the message.
- streamId
- The stream ID of the received message.
- code
- The error code. See .
- missed
- The number of lost messages.
- cached
- Number of incoming cached messages when the data stream is interrupted.
FOnTokenPrivilegeWillExpire
Occurs when the token expires in 30 seconds.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnTokenPrivilegeWillExpire, FString, token);
- In scenarios involving one channel:
- Call RenewToken to pass in the new token.
- Call LeaveChannel to leave the current channel and then pass in the new token when you call JoinChannel to join a channel.
- In scenarios involving mutiple channels: Call UpdateChannelMediaOptionsEx to pass in the new token.
Trigger timing
The SDK triggers this callback 30 seconds before the token expires, reminding the app to update the token.
Restrictions
None.
Parameters
- token
- The token that is about to expire.
FOnTranscodingUpdated
Occurs when the publisher's transcoding is updated.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnTranscodingUpdated);
When the FLiveTranscoding class in the StartRtmpStreamWithTranscoding method updates, the SDK triggers the FOnTranscodingUpdated callback to report the update information.
FOnUplinkNetworkInfoUpdated
Occurs when the uplink network information changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnUplinkNetworkInfoUpdated, const FUplinkNetworkInfo&, info);
The SDK triggers this callback when the uplink network information changes.
Parameters
- info
- The uplink network information. See FUplinkNetworkInfo.
FOnUserEnableLocalVideo
Occurs when a specific remote user enables/disables the local video capturing function.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserEnableLocalVideo, int64, uid, bool, enabled);
- Deprecated:
- This callback is deprecated, use the following enumerations in the FOnRemoteVideoStateChanged callback:
- REMOTE_VIDEO_STATE_STOPPED(0) and REMOTE_VIDEO_STATE_REASON_REMOTE_MUTED(5).
- REMOTE_VIDEO_STATE_DECODING(2) and REMOTE_VIDEO_STATE_REASON_REMOTE_UNMUTED(6).
The SDK triggers this callback when the remote user resumes or stops capturing the video stream by calling the EnableLocalVideo method.
Parameters
- uid
- The user ID of the remote user.
- enabled
-
Whether the specified remote user enables/disables local video capturing:
true
: The video module is enabled. Other users in the channel can see the video of this remote user.false
: The video module is disabled. Other users in the channel can no longer receive the video stream from this remote user, while this remote user can still receive the video streams from other users.
FOnUserEnableVideo
Occurs when a remote user enables or disables the video module.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserEnableVideo, int64, uid, bool, enabled);
Once the video module is disabled, the user can only use a voice call. The user cannot send or receive any video.
The SDK triggers this callback when a remote user enables or disables the video module by calling the EnableVideo or DisableVideo method.
Parameters
- uid
- The user ID of the remote user.
- enabled
-
true
: The video module is enabled.false
: The video module is disabled.
FOnUserInfoUpdated
Occurs when the SDK gets the user ID and user account of the remote user.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserInfoUpdated, int64, uid, const FUserInfo&, info);
After a remote user joins the channel, the SDK gets the UID and user account of the remote user, caches them in a mapping table object, and triggers this callback on the local client.
Parameters
- uid
- The user ID of the remote user.
- info
- The UserInfo object that contains the user ID and user account of the remote user. See FUserInfo for details.
FOnUserJoined
Occurs when a remote user (in the communication profile)/ host (in the live streaming profile) joins the channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserJoined, int64, uid, int, elapsed);
- In a communication channel, this callback indicates that a remote user joins the channel. The SDK also triggers this callback to report the existing users in the channel when a user joins the channel.
- In a live-broadcast channel, this callback indicates that a host joins the channel. The SDK also triggers this callback to report the existing hosts in the channel when a host joins the channel. Agora recommends limiting the number of hosts to 17.
- A remote user/host joins the channel.
- A remote user switches the user role to the host after joining the channel.
- A remote user/host rejoins the channel after a network interruption.
Parameters
- uid
- The ID of the user or host who joins the channel.
- elapsed
- Time delay (ms) from the local user calling JoinChannel until this callback is triggered.
FOnUserMuteAudio
Occurs when a remote user (in the communication profile) or a host (in the live streaming profile) stops/resumes sending the audio stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserMuteAudio, int64, uid, bool, muted);
The SDK triggers this callback when the remote user stops or resumes sending the audio stream by calling the MuteLocalAudioStream method.
Parameters
- uid
- The user ID.
- muted
- Whether the remote user's audio stream is muted:
true
: User's audio stream is muted.false
: User's audio stream is unmuted.
FOnUserMuteVideo
Occurs when a remote user stops or resumes publishing the video stream.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserMuteVideo, int64, userId, bool, muted);
When a remote user calls MuteLocalVideoStream to stop or resume publishing the video stream, the SDK triggers this callback to report to the local user the state of the streams published by the remote user.
Parameters
- uid
- The user ID of the remote user.
- muted
- Whether the remote user stops publishing the video stream:
true
: The remote user stops publishing the video stream.false
: The remote user resumes publishing the video stream.
FOnUserOffline
Occurs when a remote user (in the communication profile)/ host (in the live streaming profile) leaves the channel.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnUserOffline, int64, uid, EUSER_OFFLINE_REASON_TYPE, reason);
- Leave the channel: When a user/host leaves the channel, the user/host sends a goodbye message. When this message is received, the SDK determines that the user/host leaves the channel.
- Drop offline: When no data packet of the user or host is received for a certain period of time (20 seconds for the communication profile, and more for the live broadcast profile), the SDK assumes that the user/host drops offline. A poor network connection may lead to false detections. It's recommended to use the Agora RTM SDK for reliable offline detection.
Parameters
- uid
- The ID of the user who leaves the channel or goes offline.
- reason
-
Reasons why the user goes offline: EUSER_OFFLINE_REASON_TYPE.
FOnVideoDeviceStateChanged
Occurs when the video device state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnVideoDeviceStateChanged, FString, deviceId, int, deviceType, int, deviceState);
This callback reports the change of system video devices, such as being unplugged or removed. On a Windows device with an external camera for video capturing, the video disables once the external camera is unplugged.
Parameters
- deviceId
- The device ID.
- deviceType
- Media device types. See EENUMCUSTOM_MEDIA_DEVICE_TYPE.
- deviceState
- Media device states. See MEDIA_DEVICE_STATE_TYPE.
FOnVideoPublishStateChanged
Occurs when the video publishing state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnVideoPublishStateChanged, EVIDEO_SOURCE_TYPE, source, FString, channel, ESTREAM_PUBLISH_STATE, oldState, ESTREAM_PUBLISH_STATE, newState, int, elapseSinceLastState);
Parameters
- channel
- The channel name.
- source
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- oldState
- The previous publishing state. See ESTREAM_PUBLISH_STATE.
- newState
- The current publishing stat. See ESTREAM_PUBLISH_STATE.
- elapseSinceLastState
- The time elapsed (ms) from the previous state to the current state.
FOnVideoSizeChanged
Occurs when the video size or rotation of a specified user changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnVideoSizeChanged, EVIDEO_SOURCE_TYPE, sourceType, int64, uid, int, width, int, height, int, rotation);
Parameters
- sourceType
- The type of the video source. See EVIDEO_SOURCE_TYPE.
- uid
- The ID of the user whose video size or rotation changes. (The uid for the local user is 0. The video is the local user's video preview).
- width
- The width (pixels) of the video stream.
- height
- The height (pixels) of the video stream.
- rotation
- The rotation information. The value range is [0,360).Note: On the iOS platform, the parameter value is always 0.
FOnVideoStopped
Occurs when the video stops playing.
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnVideoStopped);
- Deprecated:
- Use LOCAL_VIDEO_STREAM_STATE_STOPPED(0) in the FOnLocalVideoStateChanged callback instead.
The application can use this callback to change the configuration of the view (for example, displaying other pictures in the view) after the video stops playing.
FOnVideoSubscribeStateChanged
Occurs when the video subscribing state changes.
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams(FOnVideoSubscribeStateChanged, FString, channel, int64, uid, ESTREAM_SUBSCRIBE_STATE, oldState, ESTREAM_SUBSCRIBE_STATE, newState, int, elapseSinceLastState);
Parameters
- channel
- The channel name.
- uid
- The user ID of the remote user.
- oldState
- The previous subscribing status. See ESTREAM_SUBSCRIBE_STATE.
- newState
- The current subscribing status. See ESTREAM_SUBSCRIBE_STATE.
- elapseSinceLastState
- The time elapsed (ms) from the previous state to the current state.