#include <IAgoraRtcEngine.h>

Inheritance diagram for agora::rtc::IRtcEngine:

Public Member Functions
virtual int	initialize (const RtcEngineContext &context)=0
	Initializes `IRtcEngine`. More...

virtual int	queryInterface (INTERFACE_ID_TYPE iid, void **inter)=0
	Gets the pointer to the specified interface. More...

virtual const char *	getVersion (int *build)=0
	Gets the SDK version. More...

virtual const char *	getErrorDescription (int code)=0
	Gets the warning or error description. More...

virtual int	queryCodecCapability (CodecCapInfo *codecInfo, int &size)=0
	Queries the video codec capabilities of the SDK. More...

virtual int	queryDeviceScore ()=0
	Queries device score. More...

virtual int	preloadChannel (const char token, const char channelId, uid_t uid)=0
	Preloads a channel with `token`, `channelId`, and `uid`. More...

virtual int	preloadChannelWithUserAccount (const char token, const char channelId, const char *userAccount)=0
	Preloads a channel with `token`, `channelId`, and `userAccount`. More...

virtual int	updatePreloadChannelToken (const char *token)=0
	Updates the wildcard token for preloading channels. More...

virtual int	joinChannel (const char token, const char channelId, const char *info, uid_t uid)=0
	Joins a channel. More...

virtual int	joinChannel (const char token, const char channelId, uid_t uid, const ChannelMediaOptions &options)=0
	Joins a channel with media options. More...

virtual int	updateChannelMediaOptions (const ChannelMediaOptions &options)=0
	Updates the channel media options after joining the channel. More...

virtual int	leaveChannel ()=0
	Leaves a channel. More...

virtual int	leaveChannel (const LeaveChannelOptions &options)=0
	Sets channel options and leaves the channel. More...

virtual int	renewToken (const char *token)=0
	Renews the token. More...

virtual int	setChannelProfile (CHANNEL_PROFILE_TYPE profile)=0
	Sets the channel profile. More...

virtual int	setClientRole (CLIENT_ROLE_TYPE role)=0
	Sets the client role. More...

virtual int	setClientRole (CLIENT_ROLE_TYPE role, const ClientRoleOptions &options)=0
	Sets the user role and the audience latency level in a live streaming scenario. More...

virtual int	startEchoTest (const EchoTestConfiguration &config)=0
	Starts an audio device loopback test. More...

virtual int	stopEchoTest ()=0
	Stops the audio call test. More...

virtual int	enableVideo ()=0
	Enables the video module. More...

virtual int	disableVideo ()=0
	Disables the video module. More...

virtual int	startPreview ()=0
	Enables the local video preview. More...

virtual int	startPreview (VIDEO_SOURCE_TYPE sourceType)=0
	Enables the local video preview and specifies the video source for the preview. More...

virtual int	stopPreview ()=0
	Stops the local video preview. More...

virtual int	stopPreview (VIDEO_SOURCE_TYPE sourceType)=0
	Stops the local video preview. More...

virtual int	startLastmileProbeTest (const LastmileProbeConfig &config)=0
	Starts the last mile network probe test. More...

virtual int	stopLastmileProbeTest ()=0
	Stops the last mile network probe test. More...

virtual int	setVideoEncoderConfiguration (const VideoEncoderConfiguration &config)=0
	Sets the video encoder configuration. More...

virtual int	setBeautyEffectOptions (bool enabled, const BeautyOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets the image enhancement options. More...

virtual int	setFaceShapeBeautyOptions (bool enabled, const FaceShapeBeautyOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets the face shape options and specifies the media source. More...

virtual int	setFaceShapeAreaOptions (const FaceShapeAreaOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets the image enhancement options for facial areas and specifies the media source. More...

virtual int	getFaceShapeBeautyOptions (FaceShapeBeautyOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Gets the beauty effect options. More...

virtual int	getFaceShapeAreaOptions (agora::rtc::FaceShapeAreaOptions::FACE_SHAPE_AREA shapeArea, FaceShapeAreaOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Gets the facial beauty area options. More...

virtual int	setFilterEffectOptions (bool enabled, const FilterEffectOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets the filter effect options and specifies the media source. More...

virtual agora_refptr< IVideoEffectObject >	createVideoEffectObject (const char *bundlePath, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Creates a video effect object. More...

virtual int	destroyVideoEffectObject (agora_refptr< IVideoEffectObject > videoEffectObject)=0
	Destroys a video effect object. More...

virtual int	setLowlightEnhanceOptions (bool enabled, const LowlightEnhanceOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets low-light enhancement. More...

virtual int	setVideoDenoiserOptions (bool enabled, const VideoDenoiserOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets video noise reduction. More...

virtual int	setColorEnhanceOptions (bool enabled, const ColorEnhanceOptions &options, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Sets color enhancement. More...

virtual int	enableVirtualBackground (bool enabled, VirtualBackgroundSource backgroundSource, SegmentationProperty segproperty, agora::media::MEDIA_SOURCE_TYPE type=agora::media::PRIMARY_CAMERA_SOURCE)=0
	Enables/Disables the virtual background. More...

virtual int	setupRemoteVideo (const VideoCanvas &canvas)=0
	Initializes the video view of a remote user. More...

virtual int	setupLocalVideo (const VideoCanvas &canvas)=0
	Initializes the local video view. More...

virtual int	setVideoScenario (VIDEO_APPLICATION_SCENARIO_TYPE scenarioType)=0
	Sets video application scenarios. More...

virtual int	setVideoQoEPreference (VIDEO_QOE_PREFERENCE_TYPE qoePreference)=0

virtual int	enableAudio ()=0
	Enables the audio module. More...

virtual int	disableAudio ()=0
	Disables the audio module. More...

virtual int	setAudioProfile (AUDIO_PROFILE_TYPE profile, AUDIO_SCENARIO_TYPE scenario) __deprecated=0
	Sets the audio profile and audio scenario. More...

virtual int	setAudioProfile (AUDIO_PROFILE_TYPE profile)=0
	Sets audio profiles. More...

virtual int	setAudioScenario (AUDIO_SCENARIO_TYPE scenario)=0
	Sets audio scenarios. More...

virtual int	enableLocalAudio (bool enabled)=0
	Enables or disables the local audio capture. More...

virtual int	muteLocalAudioStream (bool mute)=0
	Stops or resumes publishing the local audio stream. More...

virtual int	muteAllRemoteAudioStreams (bool mute)=0
	Stops or resumes subscribing to the audio streams of all remote users. More...

virtual int	muteRemoteAudioStream (uid_t uid, bool mute)=0
	Stops or resumes subscribing to the audio stream of a specified user. More...

virtual int	muteLocalVideoStream (bool mute)=0
	Stops or resumes publishing the local video stream. More...

virtual int	enableLocalVideo (bool enabled)=0
	Enables/Disables the local video capture. More...

virtual int	muteAllRemoteVideoStreams (bool mute)=0
	Stops or resumes subscribing to the video streams of all remote users. More...

virtual int	setRemoteDefaultVideoStreamType (VIDEO_STREAM_TYPE streamType)=0
	Sets the default video stream type to subscribe to. More...

virtual int	muteRemoteVideoStream (uid_t uid, bool mute)=0
	Stops or resumes subscribing to the video stream of a specified user. More...

virtual int	setRemoteVideoStreamType (uid_t uid, VIDEO_STREAM_TYPE streamType)=0
	Sets the video stream type to subscribe to. More...

virtual int	setRemoteVideoSubscriptionOptions (uid_t uid, const VideoSubscriptionOptions &options)=0
	Options for subscribing to remote video streams. More...

virtual int	setSubscribeAudioBlocklist (uid_t *uidList, int uidNumber)=0
	Sets the blocklist of subscriptions for audio streams. More...

virtual int	setSubscribeAudioAllowlist (uid_t *uidList, int uidNumber)=0
	Sets the allowlist of subscriptions for audio streams. More...

virtual int	setSubscribeVideoBlocklist (uid_t *uidList, int uidNumber)=0
	Sets the blocklist of subscriptions for video streams. More...

virtual int	setSubscribeVideoAllowlist (uid_t *uidList, int uidNumber)=0
	Sets the allowlist of subscriptions for video streams. More...

virtual int	enableAudioVolumeIndication (int interval, int smooth, bool reportVad)=0
	Enables the reporting of users' volume indication. More...

virtual int	startAudioRecording (const char *filePath, AUDIO_RECORDING_QUALITY_TYPE quality)=0
	Starts client-side audio recording with recording configuration. More...

virtual int	startAudioRecording (const char *filePath, int sampleRate, AUDIO_RECORDING_QUALITY_TYPE quality)=0
	Starts client-side audio recording and sets the recording sample rate. More...

virtual int	startAudioRecording (const AudioRecordingConfiguration &config)=0

virtual int	registerAudioEncodedFrameObserver (const AudioEncodedFrameObserverConfig &config, IAudioEncodedFrameObserver *observer)=0
	Registers an encoded audio observer. More...

virtual int	stopAudioRecording ()=0
	Stops client-side audio recording. More...

virtual agora_refptr< IMediaPlayer >	createMediaPlayer ()=0
	Creates a media player object. More...

virtual int	destroyMediaPlayer (agora_refptr< IMediaPlayer > media_player)=0
	Destroys the media player instance. More...

virtual agora_refptr< IMediaRecorder >	createMediaRecorder (const RecorderStreamInfo &info)=0
	Creates an audio and video recording object. More...

virtual int	destroyMediaRecorder (agora_refptr< IMediaRecorder > mediaRecorder)=0
	Destroys an audio and video recording object. More...

virtual int	startAudioMixing (const char *filePath, bool loopback, int cycle)=0
	Starts playing the music file. More...

virtual int	startAudioMixing (const char *filePath, bool loopback, int cycle, int startPos)=0
	Starts playing the music file. More...

virtual int	stopAudioMixing ()=0
	Stops playing the music file. More...

virtual int	pauseAudioMixing ()=0
	Pauses playing and mixing the music file. More...

virtual int	resumeAudioMixing ()=0
	Resumes playing and mixing the music file. More...

virtual int	selectAudioTrack (int index)=0
	Selects the audio track used during playback. More...

virtual int	getAudioTrackCount ()=0
	Gets the index of audio tracks of the current music file. More...

virtual int	adjustAudioMixingVolume (int volume)=0
	Adjusts the volume during audio mixing. More...

virtual int	adjustAudioMixingPublishVolume (int volume)=0
	Adjusts the volume of audio mixing for publishing. More...

virtual int	getAudioMixingPublishVolume ()=0
	Retrieves the audio mixing volume for publishing. More...

virtual int	adjustAudioMixingPlayoutVolume (int volume)=0
	Adjusts the volume of audio mixing for local playback. More...

virtual int	getAudioMixingPlayoutVolume ()=0
	Retrieves the audio mixing volume for local playback. More...

virtual int	getAudioMixingDuration ()=0
	Retrieves the duration (ms) of the music file. More...

virtual int	getAudioMixingCurrentPosition ()=0
	Retrieves the playback position (ms) of the music file. More...

virtual int	setAudioMixingPosition (int pos)=0
	Sets the audio mixing position. More...

virtual int	setAudioMixingDualMonoMode (media::AUDIO_MIXING_DUAL_MONO_MODE mode)=0
	Sets the channel mode of the current audio file. More...

virtual int	setAudioMixingPitch (int pitch)=0
	Sets the pitch of the local music file. More...

virtual int	setAudioMixingPlaybackSpeed (int speed)=0
	Sets the playback speed of the current audio file. More...

virtual int	getEffectsVolume ()=0
	Retrieves the volume of the audio effects. More...

virtual int	setEffectsVolume (int volume)=0
	Sets the volume of the audio effects. More...

virtual int	preloadEffect (int soundId, const char *filePath, int startPos=0)=0
	Preloads a specified audio effect file into the memory. More...

virtual int	playEffect (int soundId, const char *filePath, int loopCount, double pitch, double pan, int gain, bool publish=false, int startPos=0)=0
	Plays the specified local or online audio effect file. More...

virtual int	playAllEffects (int loopCount, double pitch, double pan, int gain, bool publish=false)=0
	Plays all audio effect files. More...

virtual int	getVolumeOfEffect (int soundId)=0
	Gets the volume of a specified audio effect file. More...

virtual int	setVolumeOfEffect (int soundId, int volume)=0
	Gets the volume of a specified audio effect file. More...

virtual int	pauseEffect (int soundId)=0
	Pauses a specified audio effect file. More...

virtual int	pauseAllEffects ()=0
	Pauses all audio effects. More...

virtual int	resumeEffect (int soundId)=0
	Resumes playing a specified audio effect. More...

virtual int	resumeAllEffects ()=0
	Resumes playing all audio effect files. More...

virtual int	stopEffect (int soundId)=0
	Stops playing a specified audio effect. More...

virtual int	stopAllEffects ()=0
	Stops playing all audio effects. More...

virtual int	unloadEffect (int soundId)=0
	Releases a specified preloaded audio effect from the memory. More...

virtual int	unloadAllEffects ()=0
	Releases a specified preloaded audio effect from the memory. More...

virtual int	getEffectDuration (const char *filePath)=0
	Retrieves the duration of the audio effect file. More...

virtual int	setEffectPosition (int soundId, int pos)=0
	Sets the playback position of an audio effect file. More...

virtual int	getEffectCurrentPosition (int soundId)=0
	Retrieves the playback position of the audio effect file. More...

virtual int	enableSoundPositionIndication (bool enabled)=0
	Enables or disables stereo panning for remote users. More...

virtual int	setRemoteVoicePosition (uid_t uid, double pan, double gain)=0
	Sets the 2D position (the position on the horizontal plane) of the remote user's voice. More...

virtual int	enableSpatialAudio (bool enabled)=0
	Enables or disables the spatial audio effect. More...

virtual int	setRemoteUserSpatialAudioParams (uid_t uid, const agora::SpatialAudioParams &params)=0
	Sets the spatial audio effect parameters of the remote user. More...

virtual int	setVoiceBeautifierPreset (VOICE_BEAUTIFIER_PRESET preset)=0
	Sets a preset voice beautifier effect. More...

virtual int	setAudioEffectPreset (AUDIO_EFFECT_PRESET preset)=0
	Sets an SDK preset audio effect. More...

virtual int	setVoiceConversionPreset (VOICE_CONVERSION_PRESET preset)=0
	Sets a preset voice beautifier effect. More...

virtual int	setAudioEffectParameters (AUDIO_EFFECT_PRESET preset, int param1, int param2)=0
	Sets parameters for SDK preset audio effects. More...

virtual int	setVoiceBeautifierParameters (VOICE_BEAUTIFIER_PRESET preset, int param1, int param2)=0
	Sets parameters for the preset voice beautifier effects. More...

virtual int	setVoiceConversionParameters (VOICE_CONVERSION_PRESET preset, int param1, int param2)=0

virtual int	setLocalVoicePitch (double pitch)=0
	Changes the voice pitch of the local speaker. More...

virtual int	setLocalVoiceFormant (double formantRatio)=0
	Sets the formant ratio to change the timbre of human voice. More...

virtual int	setLocalVoiceEqualization (AUDIO_EQUALIZATION_BAND_FREQUENCY bandFrequency, int bandGain)=0
	Sets the local voice equalization effect. More...

virtual int	setLocalVoiceReverb (AUDIO_REVERB_TYPE reverbKey, int value)=0
	Sets the local voice reverberation. More...

virtual int	setHeadphoneEQPreset (HEADPHONE_EQUALIZER_PRESET preset)=0
	Sets the preset headphone equalization effect. More...

virtual int	setHeadphoneEQParameters (int lowGain, int highGain)=0
	Sets the low- and high-frequency parameters of the headphone equalizer. More...

virtual int	enableVoiceAITuner (bool enabled, VOICE_AI_TUNER_TYPE type)=0
	Enables or disables the voice AI tuner. More...

virtual int	setLogFile (const char *filePath)=0
	Sets the log file. More...

virtual int	setLogFilter (unsigned int filter)=0
	Sets the log output level of the SDK. More...

virtual int	setLogLevel (commons::LOG_LEVEL level)=0
	Sets the output log level of the SDK. More...

virtual int	setLogFileSize (unsigned int fileSizeInKBytes)=0
	Sets the log file size. More...

virtual int	uploadLogFile (agora::util::AString &requestId)=0

virtual int	writeLog (commons::LOG_LEVEL level, const char *fmt,...)=0

virtual int	setLocalRenderMode (media::base::RENDER_MODE_TYPE renderMode, VIDEO_MIRROR_MODE_TYPE mirrorMode)=0
	Updates the display mode of the local video view. More...

virtual int	setRemoteRenderMode (uid_t uid, media::base::RENDER_MODE_TYPE renderMode, VIDEO_MIRROR_MODE_TYPE mirrorMode)=0
	Updates the display mode of the video view of a remote user. More...

virtual int	setLocalRenderTargetFps (VIDEO_SOURCE_TYPE sourceType, int targetFps)=0
	Sets the maximum frame rate for rendering local video. More...

virtual int	setRemoteRenderTargetFps (int targetFps)=0
	Sets the maximum frame rate for rendering remote video. More...

virtual int	setLocalRenderMode (media::base::RENDER_MODE_TYPE renderMode) __deprecated=0

virtual int	setLocalVideoMirrorMode (VIDEO_MIRROR_MODE_TYPE mirrorMode) __deprecated=0
	Sets the local video mirror mode. More...

virtual int	enableDualStreamMode (bool enabled) __deprecated=0
	Enables or disables dual-stream mode on the sender side. More...

virtual int	enableDualStreamMode (bool enabled, const SimulcastStreamConfig &streamConfig) __deprecated=0
	Sets the dual-stream mode on the sender side and the low-quality video stream. More...

virtual int	setDualStreamMode (SIMULCAST_STREAM_MODE mode)=0
	Sets the dual-stream mode on the sender side. More...

virtual int	setSimulcastConfig (const SimulcastConfig &simulcastConfig)=0
	Sets the simulcast video stream configuration. More...

virtual int	setDualStreamMode (SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig &streamConfig)=0
	Sets dual-stream mode configuration on the sender side. More...

virtual int	enableCustomAudioLocalPlayback (track_id_t trackId, bool enabled)=0
	Sets whether to enable the local playback of external audio source. More...

virtual int	setRecordingAudioFrameParameters (int sampleRate, int channel, RAW_AUDIO_FRAME_OP_MODE_TYPE mode, int samplesPerCall)=0
	Sets the format of the captured raw audio data. More...

virtual int	setPlaybackAudioFrameParameters (int sampleRate, int channel, RAW_AUDIO_FRAME_OP_MODE_TYPE mode, int samplesPerCall)=0
	Sets the format of the raw audio playback data. More...

virtual int	setMixedAudioFrameParameters (int sampleRate, int channel, int samplesPerCall)=0
	Sets the format of the raw audio data after mixing for audio capture and playback. More...

virtual int	setEarMonitoringAudioFrameParameters (int sampleRate, int channel, RAW_AUDIO_FRAME_OP_MODE_TYPE mode, int samplesPerCall)=0
	Sets the format of the in-ear monitoring raw audio data. More...

virtual int	setPlaybackAudioFrameBeforeMixingParameters (int sampleRate, int channel)=0
	Sets the format of the raw audio playback data before mixing. More...

virtual int	setPlaybackAudioFrameBeforeMixingParameters (int sampleRate, int channel, int samplesPerCall)=0
	Sets the format of audio data in the `onPlaybackAudioFrameBeforeMixing` callback. More...

virtual int	enableAudioSpectrumMonitor (int intervalInMS=100)=0
	Turns on audio spectrum monitoring. More...

virtual int	disableAudioSpectrumMonitor ()=0
	Disables audio spectrum monitoring. More...

virtual int	registerAudioSpectrumObserver (agora::media::IAudioSpectrumObserver *observer)=0
	Registers an audio spectrum observer. More...

virtual int	unregisterAudioSpectrumObserver (agora::media::IAudioSpectrumObserver *observer)=0
	Unregisters the audio spectrum observer. More...

virtual int	adjustRecordingSignalVolume (int volume)=0
	Adjusts the capturing signal volume. More...

virtual int	muteRecordingSignal (bool mute)=0
	Whether to mute the recording signal. More...

virtual int	adjustPlaybackSignalVolume (int volume)=0
	Adjusts the playback signal volume of all remote users. More...

virtual int	adjustUserPlaybackSignalVolume (uid_t uid, int volume)=0
	Adjusts the playback signal volume of a specified remote user. More...

virtual int	setRemoteSubscribeFallbackOption (STREAM_FALLBACK_OPTIONS option)=0
	Sets the fallback option for the subscribed video stream based on the network conditions. More...

virtual int	setHighPriorityUserList (uid_t *uidList, int uidNum, STREAM_FALLBACK_OPTIONS option)=0

virtual int	enableExtension (const char provider, const char extension, const ExtensionInfo &extensionInfo, bool enable=true)=0

virtual int	setExtensionProperty (const char provider, const char extension, const ExtensionInfo &extensionInfo, const char key, const char value)=0

virtual int	getExtensionProperty (const char provider, const char extension, const ExtensionInfo &extensionInfo, const char key, char value, int buf_len)=0

virtual int	enableLoopbackRecording (bool enabled, const char *deviceName=NULL)=0
	Enables loopback audio capturing. More...

virtual int	adjustLoopbackSignalVolume (int volume)=0
	Adjusts the volume of the signal captured by the sound card. More...

virtual int	getLoopbackRecordingVolume ()=0

virtual int	enableInEarMonitoring (bool enabled, int includeAudioFilters)=0
	Enables in-ear monitoring. More...

virtual int	setInEarMonitoringVolume (int volume)=0
	Sets the volume of the in-ear monitor. More...

virtual int	setExtensionProviderProperty (const char provider, const char key, const char *value)=0
	Sets the properties of the extension provider. More...

virtual int	registerExtension (const char provider, const char extension, agora::media::MEDIA_SOURCE_TYPE type=agora::media::UNKNOWN_MEDIA_SOURCE)=0
	Registers an extension. More...

virtual int	enableExtension (const char provider, const char extension, bool enable=true, agora::media::MEDIA_SOURCE_TYPE type=agora::media::UNKNOWN_MEDIA_SOURCE)=0
	Enables or disables extensions. More...

virtual int	setExtensionProperty (const char provider, const char extension, const char key, const char value, agora::media::MEDIA_SOURCE_TYPE type=agora::media::UNKNOWN_MEDIA_SOURCE)=0
	Sets the properties of the extension. More...

virtual int	getExtensionProperty (const char provider, const char extension, const char key, char value, int buf_len, agora::media::MEDIA_SOURCE_TYPE type=agora::media::UNKNOWN_MEDIA_SOURCE)=0
	Gets detailed information on the extensions. More...

virtual int	setCameraCapturerConfiguration (const CameraCapturerConfiguration &config)=0
	Sets the camera capture configuration. More...

virtual video_track_id_t	createCustomVideoTrack ()=0
	Creates a custom video track. More...

virtual video_track_id_t	createCustomEncodedVideoTrack (const SenderOptions &sender_option)=0

virtual int	destroyCustomVideoTrack (video_track_id_t video_track_id)=0
	Destroys the specified video track. More...

virtual int	destroyCustomEncodedVideoTrack (video_track_id_t video_track_id)=0

virtual int	getCallId (agora::util::AString &callId)=0
	Retrieves the call ID. More...

virtual int	rate (const char callId, int rating, const char description)=0
	Allows a user to rate a call after the call ends. More...

virtual int	complain (const char callId, const char description)=0
	Allows a user to complain about the call quality after a call ends. More...

virtual int	startRtmpStreamWithoutTranscoding (const char *url)=0
	Starts pushing media streams to a CDN without transcoding. More...

virtual int	startRtmpStreamWithTranscoding (const char *url, const LiveTranscoding &transcoding)=0
	Starts Media Push and sets the transcoding configuration. More...

virtual int	updateRtmpTranscoding (const LiveTranscoding &transcoding)=0
	Updates the transcoding configuration. More...

virtual int	startLocalVideoTranscoder (const LocalTranscoderConfiguration &config)=0
	Starts the local video mixing. More...

virtual int	updateLocalTranscoderConfiguration (const LocalTranscoderConfiguration &config)=0
	Updates the local video mixing configuration. More...

virtual int	stopRtmpStream (const char *url)=0
	Stops pushing media streams to a CDN. More...

virtual int	stopLocalVideoTranscoder ()=0
	Stops the local video mixing. More...

virtual int	startLocalAudioMixer (const LocalAudioMixerConfiguration &config)=0
	Starts local audio mixing. More...

virtual int	updateLocalAudioMixerConfiguration (const LocalAudioMixerConfiguration &config)=0
	Updates the configurations for mixing audio streams locally. More...

virtual int	stopLocalAudioMixer ()=0
	Stops the local audio mixing. More...

virtual int	startCameraCapture (VIDEO_SOURCE_TYPE sourceType, const CameraCapturerConfiguration &config)=0
	Starts camera capture. More...

virtual int	stopCameraCapture (VIDEO_SOURCE_TYPE sourceType)=0
	Stops camera capture. More...

virtual int	setCameraDeviceOrientation (VIDEO_SOURCE_TYPE type, VIDEO_ORIENTATION orientation)=0
	Sets the rotation angle of the captured video. More...

virtual int	setScreenCaptureOrientation (VIDEO_SOURCE_TYPE type, VIDEO_ORIENTATION orientation)=0

virtual int	startScreenCapture (VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration &config)=0
	Starts screen capture from the specified video source. More...

virtual int	stopScreenCapture (VIDEO_SOURCE_TYPE sourceType)=0
	Stops screen capture from the specified video source. More...

virtual CONNECTION_STATE_TYPE	getConnectionState ()=0
	Gets the current connection state of the SDK. More...

virtual bool	registerEventHandler (IRtcEngineEventHandler *eventHandler)=0

virtual bool	unregisterEventHandler (IRtcEngineEventHandler *eventHandler)=0

virtual int	setRemoteUserPriority (uid_t uid, PRIORITY_TYPE userPriority)=0

virtual int	registerPacketObserver (IPacketObserver *observer)=0
	Registers a packet observer. More...

virtual int	enableEncryption (bool enabled, const EncryptionConfig &config)=0
	Enables or disables the built-in encryption. More...

virtual int	createDataStream (int *streamId, bool reliable, bool ordered)=0
	Creates a data stream. More...

virtual int	createDataStream (int *streamId, const DataStreamConfig &config)=0
	Creates a data stream. More...

virtual int	sendStreamMessage (int streamId, const char *data, size_t length)=0
	Sends data stream messages. More...

virtual int	sendRdtMessage (uid_t uid, RdtStreamType type, const char *data, size_t length)=0
	Send Reliable message to remote uid in channel. More...

virtual int	sendMediaControlMessage (uid_t uid, const char *data, size_t length)=0
	Send media control message. More...

virtual int	addVideoWatermark (const RtcImage &watermark) __deprecated=0
	Adds a watermark image to the local video. More...

virtual int	addVideoWatermark (const char *watermarkUrl, const WatermarkOptions &options)=0
	Adds a watermark image to the local video. More...

virtual int	addVideoWatermark (const WatermarkConfig &configs)=0
	Adds a watermark image to the local video. More...

virtual int	removeVideoWatermark (const char *id)=0
	Removes the watermark image from the local video. More...

virtual int	clearVideoWatermarks ()=0
	Removes the watermark image from the video stream. More...

virtual int	pauseAudio () __deprecated=0

virtual int	resumeAudio () __deprecated=0

virtual int	enableWebSdkInteroperability (bool enabled) __deprecated=0
	Enables interoperability with the Agora Web SDK (applicable only in the live streaming. More...

virtual int	sendCustomReportMessage (const char id, const char category, const char event, const char label, int value)=0
	Reports customized messages. More...

virtual int	registerMediaMetadataObserver (IMetadataObserver *observer, IMetadataObserver::METADATA_TYPE type)=0
	Registers the metadata observer. More...

virtual int	unregisterMediaMetadataObserver (IMetadataObserver *observer, IMetadataObserver::METADATA_TYPE type)=0
	Unregisters the specified metadata observer. More...

virtual int	startAudioFrameDump (const char channel_id, uid_t uid, const char location, const char uuid, const char passwd, long duration_ms, bool auto_upload)=0

virtual int	stopAudioFrameDump (const char channel_id, uid_t uid, const char location)=0

virtual int	setAINSMode (bool enabled, AUDIO_AINS_MODE mode)=0
	Sets whether to enable the AI noise suppression function and set the noise suppression mode. More...

virtual int	registerLocalUserAccount (const char appId, const char userAccount)=0
	Registers a user account. More...

virtual int	joinChannelWithUserAccount (const char token, const char channelId, const char *userAccount)=0
	Joins a channel with a User Account and Token. More...

virtual int	joinChannelWithUserAccount (const char token, const char channelId, const char *userAccount, const ChannelMediaOptions &options)=0
	Join a channel using a user account and token, and set the media options. More...

virtual int	joinChannelWithUserAccountEx (const char token, const char channelId, const char userAccount, const ChannelMediaOptions &options, IRtcEngineEventHandler eventHandler)=0
	Join a channel using a user account and token, and set the media options. More...

virtual int	getUserInfoByUserAccount (const char userAccount, rtc::UserInfo userInfo)=0
	Gets the user information by passing in the user account. More...

virtual int	getUserInfoByUid (uid_t uid, rtc::UserInfo *userInfo)=0
	Gets the user information by passing in the user ID. More...

virtual int	startOrUpdateChannelMediaRelay (const ChannelMediaRelayConfiguration &configuration)=0
	Starts relaying media streams across channels or updates channels for media relay. More...

virtual int	stopChannelMediaRelay ()=0
	Stops the media stream relay. Once the relay stops, the host quits all the target channels. More...

virtual int	pauseAllChannelMediaRelay ()=0
	Pauses the media stream relay to all target channels. More...

virtual int	resumeAllChannelMediaRelay ()=0
	Resumes the media stream relay to all target channels. More...

virtual int	setDirectCdnStreamingAudioConfiguration (AUDIO_PROFILE_TYPE profile)=0
	Sets the audio profile of the audio streams directly pushed to the CDN by the host. More...

virtual int	setDirectCdnStreamingVideoConfiguration (const VideoEncoderConfiguration &config)=0
	Sets the video profile of the media streams directly pushed to the CDN by the host. More...

virtual int	startDirectCdnStreaming (IDirectCdnStreamingEventHandler eventHandler, const char publishUrl, const DirectCdnStreamingMediaOptions &options)=0
	Starts pushing media streams to the CDN directly. More...

virtual int	stopDirectCdnStreaming ()=0
	Stops pushing media streams to the CDN directly. More...

virtual int	updateDirectCdnStreamingMediaOptions (const DirectCdnStreamingMediaOptions &options)=0

virtual int	startRhythmPlayer (const char sound1, const char sound2, const AgoraRhythmPlayerConfig &config)=0
	Enables the virtual metronome. More...

virtual int	stopRhythmPlayer ()=0
	Disables the virtual metronome. More...

virtual int	configRhythmPlayer (const AgoraRhythmPlayerConfig &config)=0
	Configures the virtual metronome. More...

virtual int	takeSnapshot (uid_t uid, const char *filePath)=0
	Takes a snapshot of a video stream. More...

virtual int	takeSnapshot (uid_t uid, const media::SnapshotConfig &config)=0
	Takes a screenshot of the video at the specified observation point. More...

virtual int	enableContentInspect (bool enabled, const media::ContentInspectConfig &config)=0
	Enables or disables video screenshot and upload. More...

virtual int	adjustCustomAudioPublishVolume (track_id_t trackId, int volume)=0
	Adjusts the volume of the custom audio track played remotely. More...

virtual int	adjustCustomAudioPlayoutVolume (track_id_t trackId, int volume)=0
	Adjusts the volume of the custom audio track played locally. More...

virtual int	setCloudProxy (CLOUD_PROXY_TYPE proxyType)=0
	Sets up cloud proxy service. More...

virtual int	setLocalAccessPoint (const LocalAccessPointConfiguration &config)=0
	Configures the connection to Agora's Private Media Server access module. More...

virtual int	setAdvancedAudioOptions (AdvancedAudioOptions &options, int sourceType=0)=0
	Sets audio advanced options. More...

virtual int	setAVSyncSource (const char *channelId, uid_t uid)=0
	Sets audio-video synchronization for the sender. More...

virtual int	enableVideoImageSource (bool enable, const ImageTrackOptions &options)=0
	Sets whether to replace the current video feeds with images when publishing video streams. More...

virtual int64_t	getCurrentMonotonicTimeInMs ()=0
	Gets the current Monotonic Time of the SDK. More...

virtual int	getNetworkType ()=0
	Gets the type of the local network connection. More...

virtual int	setParameters (const char *parameters)=0
	Provides technical preview functionalities or special customizations by configuring the SDK with JSON options. More...

virtual int	startMediaRenderingTracing ()=0
	Enables tracing the video frame rendering process. More...

virtual int	enableInstantMediaRendering ()=0
	Enables audio and video frame instant rendering. More...

virtual uint64_t	getNtpWallTimeInMs ()=0
	Gets the current NTP (Network Time Protocol) time. More...

virtual bool	isFeatureAvailableOnDevice (FeatureType type)=0
	Checks whether the device supports the specified advanced feature. More...

virtual int	sendAudioMetadata (const char *metadata, size_t length)=0
	send audio metadata More...

virtual int	queryHDRCapability (VIDEO_MODULE_TYPE videoModule, HDR_CAPABILITY &capability)=0
	Queries the HDR capability of the video module. More...

Static Public Member Functions
static AGORA_CPP_API void	release (RtcEngineReleaseCallback callback=nullptr)
	Releases the `IRtcEngine` instance. More...

Detailed Description

The IRtcEngine class, which is the basic interface of the Agora SDK that implements the core functions of real-time communication.

IRtcEngine provides the main methods that your app can call.

Member Function Documentation

◆ release()

static AGORA_CPP_API void agora::rtc::IRtcEngine::release ( RtcEngineReleaseCallback callback = nullptr )

static

Releases the IRtcEngine instance.

This method releases all resources used by the Agora SDK. Use this method for apps in which users occasionally make voice or video calls. When users do not make calls, you can free up resources for other operations. After a successful method call, you can no longer use any method or callback in the SDK anymore. If you want to use the real-time communication functions again, you must call createAgoraRtcEngine and initialize to create a new IRtcEngine instance.

Note: Agora does not recommend you calling release in any callback of the SDK. Otherwise, the SDK cannot release the resources until the callbacks return results, which may result in a deadlock.

Parameters

callback

(Optional) Callback function pointer for setting the destruction mode of the engine to either synchronous or asynchronous. See RtcEngineReleaseCallback.

Non nullptr: Destroy the engine asynchronously. The method will return immediately, at which point the engine resources may not have been fully released yet. After the engine is destroyed, the SDK triggers RtcEngineReleaseCallback.
nullptr: Destroy the engine synchronously. This method only returns after the engine resources have been fully released.

◆ initialize()

virtual int agora::rtc::IRtcEngine::initialize ( const RtcEngineContext & context )

pure virtual

Initializes IRtcEngine.

Call timing: Before calling other APIs, you must call createAgoraRtcEngine and initialize to create and initialize the IRtcEngine object.

Note: The SDK supports creating only one IRtcEngine instance for an app. All called methods provided by the IRtcEngine class are executed asynchronously. Agora recommends calling these methods in the same thread.

Parameters

context Configurations for the IRtcEngine instance. See RtcEngineContext.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -7: The SDK is not initialized.
- -22: The resource request failed. The SDK fails to allocate resources because your app consumes too much system resource or the system resources are insufficient.
- -101: The App ID is invalid.

◆ queryInterface()

virtual int agora::rtc::IRtcEngine::queryInterface	(	INTERFACE_ID_TYPE	iid,
		void **	inter
	)

pure virtual

Gets the pointer to the specified interface.

Parameters

iid	The ID of the interface. See `INTERFACE_ID_TYPE`.
inter	An output parameter. The pointer to the specified interface.

Returns

0: Success.
< 0: Failure.

Implements agora::base::IEngineBase.

◆ getVersion()

virtual const char* agora::rtc::IRtcEngine::getVersion ( int * build )

pure virtual

Gets the SDK version.

Parameters

build The SDK build index.

Returns: The SDK version number. The format is a string.

◆ getErrorDescription()

virtual const char* agora::rtc::IRtcEngine::getErrorDescription ( int code )

pure virtual

Gets the warning or error description.

Parameters

code	The error code reported by the SDK.

Returns: The specific error description.

◆ queryCodecCapability()

virtual int agora::rtc::IRtcEngine::queryCodecCapability	(	CodecCapInfo *	codecInfo,
		int &	size
	)

pure virtual

Queries the video codec capabilities of the SDK.

Parameters

codecInfo	Input and output parameter. An array representing the video codec capabilities of the SDK. See `CodecCapInfo`. Input value: One `CodecCapInfo` defined by the user when executing this method, representing the video codec capability to be queried. Output value: The `CodecCapInfo` after the method is executed, representing the actual video codec capabilities of the SDK.
size	Input and output parameter, represent the size of the `CodecCapInfo` array. Input value: Size of the `CodecCapInfo` defined by the user when executing the method. Output value: Size of the output `CodecCapInfo` after this method is executed.

Returns

0: Success.
< 0: Failure.

◆ queryDeviceScore()

virtual int agora::rtc::IRtcEngine::queryDeviceScore ( )

pure virtual

Queries device score.

Applicable scenarios: In high-definition or ultra-high-definition video scenarios, you can first call this method to query the device's score. If the returned score is low (for example, below 60), you need to lower the video resolution to avoid affecting the video experience. The minimum device score required for different business scenarios is varied. For specific score recommendations, please technical support.

Returns

>0: The method call succeeeds, the value is the current device's score, the range is [0,100], the larger the value, the stronger the device capability. Most devices are rated between 60 and 100.
< 0: Failure.

◆ preloadChannel()

virtual int agora::rtc::IRtcEngine::preloadChannel	(	const char *	token,
		const char *	channelId,
		uid_t	uid
	)

pure virtual

Preloads a channel with token, channelId, and uid.

When audience members need to switch between different channels frequently, calling the method can help shortening the time of joining a channel, thus reducing the time it takes for audience members to hear and see the host. If you join a preloaded channel, leave it and want to rejoin the same channel, you do not need to call this method unless the token for preloading the channel expires. Call timing: To improve the user experience of preloading channels, Agora recommends that before joining the channel, calling this method as early as possible once confirming the channel name and user information.

Note

When calling this method, ensure you set the user role as audience and do not set the audio scenario as AUDIO_SCENARIO_CHORUS, otherwise, this method does not take effect.
You also need to make sure that the channel name, user ID and token passed in for preloading are the same as the values passed in when joinning the channel, otherwise, this method does not take effect.
One IRtcEngine instance supports preloading 20 channels at most. When exceeding this limit, the latest 20 preloaded channels take effect. Failing to preload a channel does not mean that you can't join a channel, nor will it increase the time of joining a channel.

Parameters

token	The token generated on your server for authentication. See .When the token for preloading channels expires, you can update the token based on the number of channels you preload. When preloading one channel, calling this method to pass in the new token. When preloading more than one channels: If you use a wildcard token for all preloaded channels, call `updatePreloadChannelToken` to update the token.Note: When generating a wildcard token, ensure the user ID is not set as 0. See `Secure authentication with tokens`. If you use different tokens to preload different channels, call this method to pass in your user ID, channel name and the new token.
channelId	The channel name that you want to preload. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
uid	The user ID. This parameter is used to identify the user in the channel for real-time audio and video interaction. You need to set and manage user IDs yourself, and ensure that each user ID in the same channel is unique. This parameter is a 32-bit unsigned integer. The value range is 1 to 2^32-1. If the user ID is not assigned (or set to 0), the SDK assigns a random user ID and `onJoinChannelSuccess` returns it in the callback. Your application must record and maintain the returned user ID, because the SDK does not do so.

Returns

0: Success.
< 0: Failure.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -102: The channel name is invalid. You need to pass in a valid channel name and join the channel again.

◆ preloadChannelWithUserAccount()

virtual int agora::rtc::IRtcEngine::preloadChannelWithUserAccount	(	const char *	token,
		const char *	channelId,
		const char *	userAccount
	)

pure virtual

Preloads a channel with token, channelId, and userAccount.

When audience members need to switch between different channels frequently, calling the method can help shortening the time of joining a channel, thus reducing the time it takes for audience members to hear and see the host. If you join a preloaded channel, leave it and want to rejoin the same channel, you do not need to call this method unless the token for preloading the channel expires. Call timing: To improve the user experience of preloading channels, Agora recommends that before joining the channel, calling this method as early as possible once confirming the channel name and user information.

Note

When calling this method, ensure you set the user role as audience and do not set the audio scenario as AUDIO_SCENARIO_CHORUS, otherwise, this method does not take effect.
You also need to make sure that the User Account, channel ID and token passed in for preloading are the same as the values passed in when joining the channel, otherwise, this method does not take effect.
One IRtcEngine instance supports preloading 20 channels at most. When exceeding this limit, the latest 20 preloaded channels take effect. Failing to preload a channel does not mean that you can't join a channel, nor will it increase the time of joining a channel.

Parameters

token	The token generated on your server for authentication. See .When the token for preloading channels expires, you can update the token based on the number of channels you preload. When preloading one channel, calling this method to pass in the new token. When preloading more than one channels: If you use a wildcard token for all preloaded channels, call `updatePreloadChannelToken` to update the token.Note: When generating a wildcard token, ensure the user ID is not set as 0. See `Secure authentication with tokens`. If you use different tokens to preload different channels, call this method to pass in your user ID, channel name and the new token.
channelId	The channel name that you want to preload. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
userAccount	The user account. This parameter is used to identify the user in the channel for real-time audio and video engagement. You need to set and manage user accounts yourself and ensure that each user account in the same channel is unique. The maximum length of this parameter is 255 bytes. Ensure that you set this parameter and do not set it as NULL. Supported characters are as follows(89 in total): The 26 lowercase English letters: a to z. The 26 uppercase English letters: A to Z. All numeric characters: 0 to 9. Space "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the User Account is empty. You need to pass in a valid parameter and join the channel again.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -102: The channel name is invalid. You need to pass in a valid channel name and join the channel again.

◆ updatePreloadChannelToken()

virtual int agora::rtc::IRtcEngine::updatePreloadChannelToken ( const char * token )

pure virtual

Updates the wildcard token for preloading channels.

You need to maintain the life cycle of the wildcard token by yourself. When the token expires, you need to generate a new wildcard token and then call this method to pass in the new token. Applicable scenarios: In scenarios involving multiple channels, such as switching between different channels, using a wildcard token means users do not need to apply for a new token every time joinning a new channel, which can save users time for switching channels and reduce the pressure on your token server.

Parameters

token The new token.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid. You need to pass in a valid parameter and join the channel again.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.

◆ joinChannel() [1/2]

virtual int agora::rtc::IRtcEngine::joinChannel	(	const char *	token,
		const char *	channelId,
		const char *	info,
		uid_t	uid
	)

pure virtual

Joins a channel.

By default, the user subscribes to the audio and video streams of all the other users in the channel, giving rise to usage and billings. To stop subscribing to a specified stream or all remote streams, call the corresponding mute methods. Call timing: Call this method after initialize. Related callbacks: A successful call of this method triggers the following callbacks:

The local client: The onJoinChannelSuccess and onConnectionStateChanged callbacks.
The remote client: The onUserJoined callback, if a user joining the channel in the COMMUNICATION profile, or a host joining a channel in the LIVE_BROADCASTING profile. When the connection between the local client and Agora's server is interrupted due to poor network conditions, the SDK tries reconnecting to the server. When the local client successfully rejoins the channel, the SDK triggers the onRejoinChannelSuccess callback on the local client.

Note

This method only supports users joining one channel at a time.
Users with different App IDs cannot call each other.
Before joining a channel, ensure that the App ID you use to generate a token is the same as that you pass in the initialize method; otherwise, you may fail to join the channel with the token.

Parameters

token	The token generated on your server for authentication. See .Note: (Recommended) If your project has enabled the security mode (using APP ID and Token for authentication), this parameter is required. If you have only enabled the testing mode (using APP ID for authentication), this parameter is optional. You will automatically exit the channel 24 hours after successfully joining in. If you need to join different channels at the same time or switch between channels, Agora recommends using a wildcard token so that you don't need to apply for a new token every time joining a channel. See `Secure authentication with tokens`.
channelId	The channel name. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
info	(Optional) Reserved for future use.
uid	The user ID. This parameter is used to identify the user in the channel for real-time audio and video interaction. You need to set and manage user IDs yourself, and ensure that each user ID in the same channel is unique. This parameter is a 32-bit unsigned integer. The value range is 1 to 2^32-1. If the user ID is not assigned (or set to 0), the SDK assigns a random user ID and `onJoinChannelSuccess` returns it in the callback. Your application must record and maintain the returned user ID, because the SDK does not do so.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid, the uid parameter is not set to an integer, or the value of a member in ChannelMediaOptions is invalid. You need to pass in a valid parameter and join the channel again.
- -3: Fails to initialize the IRtcEngine object. You need to reinitialize the IRtcEngine object.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The typical cause is that after calling startEchoTest to start a call loop test, you call this method to join the channel without calling stopEchoTest to stop the test. You need to call stopEchoTest before calling this method.
- -17: The request to join the channel is rejected. The typical cause is that the user is already in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. Do not call this method to join the channel unless you receive the CONNECTION_STATE_DISCONNECTED (1) state.
- -102: The channel name is invalid. You need to pass in a valid channel name in channelId to rejoin the channel.
- -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.

◆ joinChannel() [2/2]

virtual int agora::rtc::IRtcEngine::joinChannel	(	const char *	token,
		const char *	channelId,
		uid_t	uid,
		const ChannelMediaOptions &	options
	)

pure virtual

Joins a channel with media options.

Compared to joinChannel(const char* token, const char* channelId, const char* info, uid_t uid), this method has the options parameter which is used to set media options, such as whether to publish audio and video streams within a channel, or whether to automatically subscribe to the audio and video streams of all remote users when joining a channel. By default, the user subscribes to the audio and video streams of all the other users in the channel, giving rise to usage and billings. To stop subscribing to other streams, set the options parameter or call the corresponding mute methods. Call timing: Call this method after initialize. Related callbacks: A successful call of this method triggers the following callbacks:

The local client: The onJoinChannelSuccess and onConnectionStateChanged callbacks.
The remote client: The onUserJoined callback, if a user joining the channel in the COMMUNICATION profile, or a host joining a channel in the LIVE_BROADCASTING profile. When the connection between the local client and Agora's server is interrupted due to poor network conditions, the SDK tries reconnecting to the server. When the local client successfully rejoins the channel, the SDK triggers the onRejoinChannelSuccess callback on the local client.

Note

This method only supports users joining one channel at a time.
Users with different App IDs cannot call each other.
Before joining a channel, ensure that the App ID you use to generate a token is the same as that you pass in the initialize method; otherwise, you may fail to join the channel with the token.

Parameters

token	The token generated on your server for authentication. See .Note: (Recommended) If your project has enabled the security mode (using APP ID and Token for authentication), this parameter is required. If you have only enabled the testing mode (using APP ID for authentication), this parameter is optional. You will automatically exit the channel 24 hours after successfully joining in. If you need to join different channels at the same time or switch between channels, Agora recommends using a wildcard token so that you don't need to apply for a new token every time joining a channel. See `Secure authentication with tokens`.
channelId	The channel name. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
uid	The user ID. This parameter is used to identify the user in the channel for real-time audio and video interaction. You need to set and manage user IDs yourself, and ensure that each user ID in the same channel is unique. This parameter is a 32-bit unsigned integer. The value range is 1 to 2^32-1. If the user ID is not assigned (or set to 0), the SDK assigns a random user ID and `onJoinChannelSuccess` returns it in the callback. Your application must record and maintain the returned user ID, because the SDK does not do so.
options	The channel media options. See `ChannelMediaOptions`.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid, the uid parameter is not set to an integer, or the value of a member in ChannelMediaOptions is invalid. You need to pass in a valid parameter and join the channel again.
- -3: Fails to initialize the IRtcEngine object. You need to reinitialize the IRtcEngine object.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The typical cause is that after calling startEchoTest to start a call loop test, you call this method to join the channel without calling stopEchoTest to stop the test. You need to call stopEchoTest before calling this method.
- -17: The request to join the channel is rejected. The typical cause is that the user is already in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. Do not call this method to join the channel unless you receive the CONNECTION_STATE_DISCONNECTED (1) state.
- -102: The channel name is invalid. You need to pass in a valid channel name in channelId to rejoin the channel.
- -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.

◆ updateChannelMediaOptions()

virtual int agora::rtc::IRtcEngine::updateChannelMediaOptions ( const ChannelMediaOptions & options )

pure virtual

Updates the channel media options after joining the channel.

Parameters

options The channel media options. See ChannelMediaOptions.

Returns

0: Success.
< 0: Failure.
- -2: The value of a member in ChannelMediaOptions is invalid. For example, the token or the user ID is invalid. You need to fill in a valid parameter.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The possible reason is that the user is not in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. If you receive the CONNECTION_STATE_DISCONNECTED (1) or CONNECTION_STATE_FAILED (5) state, the user is not in the channel. You need to call joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join a channel before calling this method.

◆ leaveChannel() [1/2]

virtual int agora::rtc::IRtcEngine::leaveChannel ( )

pure virtual

Leaves a channel.

After calling this method, the SDK terminates the audio and video interaction, leaves the current channel, and releases all resources related to the session. After joining the channel, you must call this method to end the call; otherwise, the next call cannot be started. Call timing: Call this method after joining a channel. Related callbacks: A successful call of this method triggers the following callbacks:

The local client: The onLeaveChannel callback will be triggered.
The remote client: The onUserOffline callback will be triggered after the remote host leaves the channel.

Note

If you call release immediately after calling this method, the SDK does not trigger the onLeaveChannel callback.

This method call is asynchronous. When this method returns, it does not necessarily mean that the user has left the channel.
If you have called joinChannelEx to join multiple channels, calling this method will leave all the channels you joined.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -7: The SDK is not initialized.

◆ leaveChannel() [2/2]

virtual int agora::rtc::IRtcEngine::leaveChannel ( const LeaveChannelOptions & options )

pure virtual

Sets channel options and leaves the channel.

After calling this method, the SDK terminates the audio and video interaction, leaves the current channel, and releases all resources related to the session. After joining a channel, you must call this method or leaveChannel() to end the call, otherwise, the next call cannot be started. If you have called joinChannelEx to join multiple channels, calling this method will leave all the channels you joined. Call timing: Call this method after joining a channel. Related callbacks: A successful call of this method triggers the following callbacks:

The local client: The onLeaveChannel callback will be triggered.
The remote client: The onUserOffline callback will be triggered after the remote host leaves the channel.

Note: If you call release immediately after calling this method, the SDK does not trigger the onLeaveChannel callback. This method call is asynchronous. When this method returns, it does not necessarily mean that the user has left the channel.

Parameters

options The options for leaving the channel. See LeaveChannelOptions.

Returns

0: Success.
< 0: Failure.

◆ renewToken()

virtual int agora::rtc::IRtcEngine::renewToken ( const char * token )

pure virtual

Renews the token.

This method is used to update the token. After successfully calling this method, the SDK will trigger the onRenewTokenResult callback. A token will expire after a certain period of time, at which point the SDK will be unable to establish a connection with the server. Call timing: In any of the following cases, Agora recommends that you generate a new token on your server and then call this method to renew your token:

Receiving the onTokenPrivilegeWillExpire callback reporting the token is about to expire.
Receiving the onRequestToken callback reporting the token has expired.
Receiving the onConnectionStateChanged callback reporting CONNECTION_CHANGED_TOKEN_EXPIRED (9).

Parameters

token The new token.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is empty.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- 110: Invalid token. Ensure the following:
  - The user ID specified when generating the token is consistent with the user ID used when joining the channel.
  - The generated token is the same as the token passed in to join the channel.

◆ setChannelProfile()

virtual int agora::rtc::IRtcEngine::setChannelProfile ( CHANNEL_PROFILE_TYPE profile )

pure virtual

Sets the channel profile.

You can call this method to set the channel profile. The SDK adopts different optimization strategies for different channel profiles. For example, in a live streaming scenario, the SDK prioritizes video quality. After initializing the SDK, the default channel profile is the live streaming profile. Call timing: Call this method before joining a channel.

Note: To ensure the quality of real-time communication, Agora recommends that all users in a channel use the same channel profile. In different channel scenarios, the default audio routing of the SDK is different. See setDefaultAudioRouteToSpeakerphone.

Parameters

profile The channel profile. See CHANNEL_PROFILE_TYPE.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid.
- -7: The SDK is not initialized.

◆ setClientRole() [1/2]

virtual int agora::rtc::IRtcEngine::setClientRole ( CLIENT_ROLE_TYPE role )

pure virtual

Sets the client role.

By default,the SDK sets the user role as audience. You can call this method to set the user role as host. The user role ( roles ) determines the users' permissions at the SDK level, including whether they can publish audio and video streams in a channel. Call timing: You can call this method either before or after joining a channel. If you call this method to set the user role as the host before joining the channel and set the local video property through the setupLocalVideo method, the local video preview is automatically enabled when the user joins the channel. If you call this method to set the user role after joining a channel, the SDK will automatically call the muteLocalAudioStream and muteLocalVideoStream method to change the state for publishing audio and video streams. Related callbacks: If you call this method to switch the user role after joining the channel, the SDK triggers the following callbacks:

Triggers onClientRoleChanged on the local client.Note: Calling this method before joining a channel and set the role to AUDIENCE will trigger this callback as well.
Triggers onUserJoined or onUserOffline on the remote client. If you call this method to set the user role after joining a channel but encounter a failure, the SDK trigger the onClientRoleChangeFailed callback to report the reason for the failure and the current user role.

Note: When calling this method before joining a channel and setting the user role to BROADCASTER, the onClientRoleChanged callback will not be triggered on the local client. Calling this method before joining a channel and set the role to AUDIENCE will trigger this callback as well.

Parameters

role	The user role. See `CLIENT_ROLE_TYPE`. Note: If you set the user role as an audience member, you cannot publish audio and video streams in the channel. If you want to publish media streams in a channel during live streaming, ensure you set the user role as broadcaster.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -7: The SDK is not initialized.

◆ setClientRole() [2/2]

virtual int agora::rtc::IRtcEngine::setClientRole	(	CLIENT_ROLE_TYPE	role,
		const ClientRoleOptions &	options
	)

pure virtual

Sets the user role and the audience latency level in a live streaming scenario.

By default,the SDK sets the user role as audience. You can call this method to set the user role as host. The user role ( roles ) determines the users' permissions at the SDK level, including whether they can publish audio and video streams in a channel. The difference between this method and setClientRole(CLIENT_ROLE_TYPE role) is that, this method supports setting the audienceLatencyLevel. audienceLatencyLevel needs to be used together with role to determine the level of service that users can enjoy within their permissions. For example, an audience member can choose to receive remote streams with low latency or ultra-low latency. Call timing: You can call this method either before or after joining a channel. If you call this method to set the user role as the host before joining the channel and set the local video property through the setupLocalVideo method, the local video preview is automatically enabled when the user joins the channel. If you call this method to set the user role after joining a channel, the SDK will automatically call the muteLocalAudioStream and muteLocalVideoStream method to change the state for publishing audio and video streams. Related callbacks: If you call this method to switch the user role after joining the channel, the SDK triggers the following callbacks:

Triggers onClientRoleChanged on the local client.Note: Calling this method before joining a channel and set the role to AUDIENCE will trigger this callback as well.
Triggers onUserJoined or onUserOffline on the remote client. If you call this method to set the user role after joining a channel but encounter a failure, the SDK trigger the onClientRoleChangeFailed callback to report the reason for the failure and the current user role.

Note: When the user role is set to host, the audience latency level can only be set to AUDIENCE_LATENCY_LEVEL_ULTRA_LOW_LATENCY. When calling this method before joining a channel and setting the role to BROADCASTER, the onClientRoleChanged callback will not be triggered on the local client. Calling this method before joining a channel and set the role to AUDIENCE will trigger this callback as well.

Parameters

role	The user role. See `CLIENT_ROLE_TYPE`. Note: If you set the user role as an audience member, you cannot publish audio and video streams in the channel. If you want to publish media streams in a channel during live streaming, ensure you set the user role as broadcaster.
options	The detailed options of a user, including the user level. See `ClientRoleOptions`.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -5: The request is rejected.
- -7: The SDK is not initialized.

◆ startEchoTest()

virtual int agora::rtc::IRtcEngine::startEchoTest ( const EchoTestConfiguration & config )

pure virtual

Starts an audio device loopback test.

To test whether the user's local sending and receiving streams are normal, you can call this method to perform an audio and video call loop test, which tests whether the audio and video devices and the user's upstream and downstream networks are working properly. After starting the test, the user needs to make a sound or face the camera. The audio or video is output after about two seconds. If the audio playback is normal, the audio device and the user's upstream and downstream networks are working properly; if the video playback is normal, the video device and the user's upstream and downstream networks are working properly. Call timing: You can call this method either before or after joining a channel.

Note

When calling in a channel, make sure that no audio or video stream is being published.
After calling this method, call stopEchoTest to end the test; otherwise, the user cannot perform the next audio and video call loop test and cannot join the channel.
In live streaming scenarios, this method only applies to hosts.

Parameters

config The configuration of the audio and video call loop test. See EchoTestConfiguration.

Returns

0: Success.
< 0: Failure.

◆ stopEchoTest()

virtual int agora::rtc::IRtcEngine::stopEchoTest ( )

pure virtual

Stops the audio call test.

After calling startEchoTest, you must call this method to end the test; otherwise, the user cannot perform the next audio and video call loop test and cannot join the channel.

Returns

0: Success.
< 0: Failure.
- -5(ERR_REFUSED): Failed to stop the echo test. The echo test may not be running.

◆ enableVideo()

virtual int agora::rtc::IRtcEngine::enableVideo ( )

pure virtual

Enables the video module.

The video module is disabled by default, call this method to enable it. If you need to disable the video module later, you need to call disableVideo. Call timing: This method can be called either before joining a channel or while in the channel:

If called before joining a channel, it enables the video module.
If called during an audio-only call, the audio call automatically switches to a video call. Related callbacks: A successful call of this method triggers the onRemoteVideoStateChanged callback on the remote client.

Note

This method enables the internal engine and is valid after leaving the channel.
Calling this method will reset the entire engine, resulting in a slow response time. You can use the following methods to independently control a specific function of the video module based on your actual needs:
- enableLocalVideo: Whether to enable the camera to create the local video stream.
- muteLocalVideoStream: Whether to publish the local video stream.
- muteRemoteVideoStream: Whether to subscribe to and play the remote video stream.
- muteAllRemoteVideoStreams: Whether to subscribe to and play all remote video streams.
A successful call of this method resets enableLocalVideo, muteRemoteVideoStream, and muteAllRemoteVideoStreams. Proceed it with caution.

Returns

0: Success.
< 0: Failure.

◆ disableVideo()

virtual int agora::rtc::IRtcEngine::disableVideo ( )

pure virtual

Disables the video module.

This method is used to disable the video module. Call timing: This method can be called either before or after joining the channel.

If it is called before joining the channel, the audio-only mode is enabled.
If it is called after joining the channel, it switches from video mode to audio-only mode. Then, calling enableVideo can swithch to video mode again. Related callbacks: A successful call of this method triggers the onUserEnableVideo (false) callback on the remote client.

Note

This method affects the internal engine and can be called after leaving the channel.
Calling this method will reset the entire engine, resulting in a slow response time. You can use the following methods to independently control a specific function of the video module based on your actual needs:
- enableLocalVideo: Whether to enable the camera to create the local video stream.
- muteLocalVideoStream: Whether to publish the local video stream.
- muteRemoteVideoStream: Whether to subscribe to and play the remote video stream.
- muteAllRemoteVideoStreams: Whether to subscribe to and play all remote video streams.

Returns

0: Success.
< 0: Failure.

◆ startPreview() [1/2]

virtual int agora::rtc::IRtcEngine::startPreview ( )

pure virtual

Enables the local video preview.

You can call this method to enable local video preview. Call timing: This method must be called after enableVideo and setupLocalVideo.

Note

The local preview enables the mirror mode by default.
After leaving the channel, local preview remains enabled. You need to call stopPreview() to disable local preview.

Returns

0: Success.
< 0: Failure.

◆ startPreview() [2/2]

virtual int agora::rtc::IRtcEngine::startPreview ( VIDEO_SOURCE_TYPE sourceType )

pure virtual

Enables the local video preview and specifies the video source for the preview.

This method is used to start local video preview and specify the video source that appears in the preview screen. Call timing: This method must be called after enableVideo and setupLocalVideo.

Note

The local preview enables the mirror mode by default.
After leaving the channel, local preview remains enabled. You need to call stopPreview() to disable local preview.

Parameters

sourceType The type of the video source. See VIDEO_SOURCE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ stopPreview() [1/2]

virtual int agora::rtc::IRtcEngine::stopPreview ( )

pure virtual

Stops the local video preview.

Applicable scenarios: After calling startPreview() to start the preview, if you want to stop the local video preview, call this method. Call timing: Call this method before joining a channel or after leaving a channel.

Returns

0: Success.
< 0: Failure.

◆ stopPreview() [2/2]

virtual int agora::rtc::IRtcEngine::stopPreview ( VIDEO_SOURCE_TYPE sourceType )

pure virtual

Stops the local video preview.

Applicable scenarios: After calling startPreview(VIDEO_SOURCE_TYPE sourceType) to start the preview, if you want to stop the local video preview, call this method. Call timing: Call this method before joining a channel or after leaving a channel.

Parameters

sourceType The type of the video source. See VIDEO_SOURCE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ startLastmileProbeTest()

virtual int agora::rtc::IRtcEngine::startLastmileProbeTest ( const LastmileProbeConfig & config )

pure virtual

Starts the last mile network probe test.

This method starts the last-mile network probe test before joining a channel to get the uplink and downlink last mile network statistics, including the bandwidth, packet loss, jitter, and round-trip time (RTT). Call timing: Do not call other methods before receiving the onLastmileQuality and onLastmileProbeResult callbacks. Otherwise, the callbacks may be interrupted. Related callbacks: After successfully calling this method, the SDK sequentially triggers the following 2 callbacks:

onLastmileQuality: The SDK triggers this callback within two seconds depending on the network conditions. This callback rates the network conditions and is more closely linked to the user experience.
onLastmileProbeResult: The SDK triggers this callback within 30 seconds depending on the network conditions. This callback returns the real-time statistics of the network conditions and is more objective.

Parameters

config The configurations of the last-mile network probe test. See LastmileProbeConfig.

Returns

0: Success.
< 0: Failure.

◆ stopLastmileProbeTest()

virtual int agora::rtc::IRtcEngine::stopLastmileProbeTest ( )

pure virtual

Stops the last mile network probe test.

Returns

0: Success.
< 0: Failure.

◆ setVideoEncoderConfiguration()

virtual int agora::rtc::IRtcEngine::setVideoEncoderConfiguration ( const VideoEncoderConfiguration & config )

pure virtual

Sets the video encoder configuration.

Sets the encoder configuration for the local video. Each configuration profile corresponds to a set of video parameters, including the resolution, frame rate, and bitrate. Call timing: You can call this method either before or after joining a channel. If the user does not need to reset the video encoding properties after joining the channel, Agora recommends calling this method before enableVideo to reduce the time to render the first video frame.

Note

Both this method and the getMirrorApplied method support setting the mirroring effect. Agora recommends that you only choose one method to set it up. Using both methods at the same time causes the mirroring effect to overlap, and the mirroring settings fail.
The config specified in this method is the maximum value under ideal network conditions. If the video engine cannot render the video using the specified config due to unreliable network conditions, the parameters further down the list are considered until a successful configuration is found.

Parameters

config Video profile. See VideoEncoderConfiguration.

Returns

0: Success.
< 0: Failure.

◆ setBeautyEffectOptions()

virtual int agora::rtc::IRtcEngine::setBeautyEffectOptions	(	bool	enabled,
		const BeautyOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets the image enhancement options.

Enables or disables image enhancement, and sets the options. Call timing: Call this method after calling enableVideo or startPreview(VIDEO_SOURCE_TYPE sourceType).

Note

This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
This feature has high requirements on device performance. When calling this method, the SDK automatically checks the capabilities of the current device.

Parameters

enabled	Whether to enable the image enhancement function: `true`: Enable the image enhancement function. `false`: (Default) Disable the image enhancement function.
options	The image enhancement options. See `BeautyOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.
- -4: The current device does not support this feature. Possible reasons include:
  - The current device capabilities do not meet the requirements for image enhancement. Agora recommends you replace it with a high-performance device.

◆ setFaceShapeBeautyOptions()

virtual int agora::rtc::IRtcEngine::setFaceShapeBeautyOptions	(	bool	enabled,
		const FaceShapeBeautyOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets the face shape options and specifies the media source.

Calling this method allows for modifying various parts of the face, achieving slimming, enlarging eyes, slimming nose, and other minor cosmetic effects all at once using preset parameters, supporting fine-tuning the overall modification intensity. Call timing: Call this method after calling enableVideo.

Note

This method only applies to Android 4.4 or later.
This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
This feature has high requirements on device performance. When calling this method, the SDK automatically checks the capabilities of the current device.

Parameters

enabled	Whether to enable the face shape effect: `true`: Enable the face shape effect. `false`: (Default) Disable the face shape effect.
options	Face shaping style options, see `FaceShapeBeautyOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.
- -4: The current device does not support this feature. Possible reasons include:
  - The current device capabilities do not meet the requirements for image enhancement. Agora recommends you replace it with a high-performance device.
  - The current device version is lower than Android 4.4 and does not support this feature. Agora recommends you replace the device or upgrade the operating system.

◆ setFaceShapeAreaOptions()

virtual int agora::rtc::IRtcEngine::setFaceShapeAreaOptions	(	const FaceShapeAreaOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets the image enhancement options for facial areas and specifies the media source.

If the preset beauty effects implemented in the setFaceShapeBeautyOptions method do not meet expectations, you can use this method to set beauty area options, individually fine-tune each part of the face, and achieve a more refined beauty effect. Call timing: Call this method after calling setFaceShapeBeautyOptions.

Note

This method only applies to Android 4.4 or later.
This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
This feature has high requirements on device performance. When calling this method, the SDK automatically checks the capabilities of the current device.

Parameters

options	Facial enhancement areas, see `FaceShapeAreaOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.
- -4: The current device does not support this feature. Possible reasons include:
  - The current device capabilities do not meet the requirements for image enhancement. Agora recommends you replace it with a high-performance device.
  - The current device version is lower than Android 4.4 and does not support this feature. Agora recommends you replace the device or upgrade the operating system.

◆ getFaceShapeBeautyOptions()

virtual int agora::rtc::IRtcEngine::getFaceShapeBeautyOptions	(	FaceShapeBeautyOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Gets the beauty effect options.

Calling this method can retrieve the current settings of the beauty effect. Applicable scenarios: When the user opens the beauty style and style intensity menu in the app, you can call this method to get the current beauty effect options, then refresh the menu in the user interface according to the results, and update the UI. Call timing: Call this method after calling enableVideo.

Parameters

options	Face shaping style options, see `FaceShapeBeautyOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ getFaceShapeAreaOptions()

virtual int agora::rtc::IRtcEngine::getFaceShapeAreaOptions	(	agora::rtc::FaceShapeAreaOptions::FACE_SHAPE_AREA	shapeArea,
		FaceShapeAreaOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Gets the facial beauty area options.

Calling this method can retrieve the current settings of the beauty effect. Applicable scenarios: When the user opens the facial beauty area and shaping intensity menu in the app, you can call this method to get the current beauty effect options, then refresh the menu in the user interface according to the results, and update the UI. Call timing: Call this method after calling enableVideo.

Parameters

shapeArea	Facial enhancement areas. See `FACE_SHAPE_AREA`.
options	Facial enhancement areas, see `FaceShapeAreaOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ setFilterEffectOptions()

virtual int agora::rtc::IRtcEngine::setFilterEffectOptions	(	bool	enabled,
		const FilterEffectOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets the filter effect options and specifies the media source.

Since: v4.4.1

Call timing: Call this method after calling enableVideo.

Note

This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
This feature has high requirements on device performance. When calling this method, the SDK automatically checks the capabilities of the current device.

Parameters

enabled	Whether to enable the filter effect: `true`: Yes. `false`: (Default) No.
options	The filter effect options. See `FilterEffectOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ createVideoEffectObject()

virtual agora_refptr<IVideoEffectObject> agora::rtc::IRtcEngine::createVideoEffectObject	(	const char *	bundlePath,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Creates a video effect object.

Since: v4.6.0

Creates an IVideoEffectObject video effect object and returns its pointer.

Parameters

bundlePath	The path to the video effect bundle.
type	The media source type. See `MEDIA_SOURCE_TYPE`.

Returns

The IVideoEffectObject object pointer, if the method call succeeds.
An empty pointer, if the method call fails.

◆ destroyVideoEffectObject()

virtual int agora::rtc::IRtcEngine::destroyVideoEffectObject ( agora_refptr< IVideoEffectObject > videoEffectObject )

pure virtual

Destroys a video effect object.

Since: v4.6.0

Parameters

videoEffectObject The video effect object to be destroyed. See IVideoEffectObject.

Returns

0: Success.
< 0: Failure.

◆ setLowlightEnhanceOptions()

virtual int agora::rtc::IRtcEngine::setLowlightEnhanceOptions	(	bool	enabled,
		const LowlightEnhanceOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets low-light enhancement.

Since: v4.0.0

You can call this method to enable the color enhancement feature and set the options of the color enhancement effect. Applicable scenarios: The low-light enhancement feature can adaptively adjust the brightness value of the video captured in situations with low or uneven lighting, such as backlit, cloudy, or dark scenes. It restores or highlights the image details and improves the overall visual effect of the video. Call timing: Call this method after calling enableVideo.

Note

This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
Dark light enhancement has certain requirements for equipment performance. The low-light enhancement feature has certain performance requirements on devices. If your device overheats after you enable low-light enhancement, Agora recommends modifying the low-light enhancement options to a less performance-consuming level or disabling low-light enhancement entirely.
If you want to prioritize image quality ( LOW_LIGHT_ENHANCE_LEVEL_HIGH_QUALITY ) when using the low-light enhancement function, you need to first call setVideoDenoiserOptions to achieve video noise reduction, the specific corresponding relationship is as follows:
- When low light enhancement is set to automatic mode ( LOW_LIGHT_ENHANCE_AUTO ), video noise reduction needs to be set to prioritize image quality ( VIDEO_DENOISER_LEVEL_HIGH_QUALITY ) and automatic mode ( VIDEO_DENOISER_AUTO ).
- When low-light enhancement is set to manual mode ( LOW_LIGHT_ENHANCE_MANUAL ), video noise reduction needs to be set to prioritize image quality ( VIDEO_DENOISER_LEVEL_HIGH_QUALITY ) and manual mode ( VIDEO_DENOISER_MANUAL ).

Parameters

enabled	Whether to enable low-light enhancement: `true`: Enable low-light enhancement. `false`: (Default) Disable low-light enhancement.
options	The low-light enhancement options. See `LowlightEnhanceOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ setVideoDenoiserOptions()

virtual int agora::rtc::IRtcEngine::setVideoDenoiserOptions	(	bool	enabled,
		const VideoDenoiserOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets video noise reduction.

Since: v4.0.0

You can call this method to enable the video noise reduction feature and set the options of the video noise reduction effect. Applicable scenarios: dark environments and low-end video capture devices can cause video images to contain significant noise, which affects video quality. In real-time interactive scenarios, video noise also consumes bitstream resources and reduces encoding efficiency during encoding. Call timing: Call this method after calling enableVideo.

Note

This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.
Video noise reduction has certain requirements for equipment performance. If your device overheats after you enable video noise reduction, Agora recommends modifying the video noise reduction options to a less performance-consuming level or disabling video noise reduction entirely. If the noise reduction implemented by this method does not meet your needs, Agora recommends that you call the setBeautyEffectOptions method to enable the beauty and skin smoothing function to achieve better video noise reduction effects. The recommended BeautyOptions settings for intense noise reduction effect are as follows:
lighteningContrastLevel LIGHTENING_CONTRAST_NORMAL
lighteningLevel: 0.0
smoothnessLevel: 0.5
rednessLevel: 0.0
sharpnessLevel: 0.1

Parameters

enabled	Whether to enable video noise reduction: `true`: Enable video noise reduction. `false`: (Default) Disable video noise reduction.
options	The video noise reduction options. See `VideoDenoiserOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ setColorEnhanceOptions()

virtual int agora::rtc::IRtcEngine::setColorEnhanceOptions	(	bool	enabled,
		const ColorEnhanceOptions &	options,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Sets color enhancement.

Since: v4.0.0

The video images captured by the camera can have color distortion. The color enhancement feature intelligently adjusts video characteristics such as saturation and contrast to enhance the video color richness and color reproduction, making the video more vivid. You can call this method to enable the color enhancement feature and set the options of the color enhancement effect.

Note

Call this method after calling enableVideo.
The color enhancement feature has certain performance requirements on devices. With color enhancement turned on, Agora recommends that you change the color enhancement level to one that consumes less performance or turn off color enhancement if your device is experiencing severe heat problems.
This method relies on the image enhancement dynamic library libagora_clear_vision_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

enabled	Whether to enable color enhancement: `true` Enable color enhancement. `false`: (Default) Disable color enhancement.
options	The color enhancement options. See `ColorEnhanceOptions`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.

◆ enableVirtualBackground()

virtual int agora::rtc::IRtcEngine::enableVirtualBackground	(	bool	enabled,
		VirtualBackgroundSource	backgroundSource,
		SegmentationProperty	segproperty,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::PRIMARY_CAMERA_SOURCE`
	)

pure virtual

Enables/Disables the virtual background.

Since: v3.7.200

The virtual background feature enables the local user to replace their original background with a static image, dynamic video, blurred background, or portrait-background segmentation to achieve picture-in-picture effect. Once the virtual background feature is enabled, all users in the channel can see the custom background. Call this method after calling enableVideo or startPreview(VIDEO_SOURCE_TYPE sourceType).

Note

Using a video as a your virtual background will lead to continuous increase in memory usage, which may cause issues such as app crashes. Therefore,it is recommended to reduce the resolution and frame rate of the video when using it.
This feature has high requirements on device performance. When calling this method, the SDK automatically checks the capabilities of the current device. Agora recommends you use virtual background on devices with the following processors:
- Snapdragon 700 series 750G and later
- Snapdragon 800 series 835 and later
- Dimensity 700 series 720 and later
- Kirin 800 series 810 and later
- Kirin 900 series 980 and later
- Devices with an i5 CPU and better
- Devices with an A9 chip and better, as follows:
  - iPhone 6S and later
  - iPad Air 3rd generation and later
  - iPad 5th generation and later
  - iPad Pro 1st generation and later
  - iPad mini 5th generation and later
Agora recommends that you use this feature in scenarios that meet the following conditions:
- A high-definition camera device is used, and the environment is uniformly lit.
- There are few objects in the captured video. Portraits are half-length and unobstructed. Ensure that the background is a solid color that is different from the color of the user's clothing.
This method relies on the virtual background dynamic library libagora_segmentation_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

enabled	Whether to enable virtual background: `true`: Enable virtual background. `false`: Disable virtual background.
backgroundSource	The custom background. See `VirtualBackgroundSource`. To adapt the resolution of the custom background image to that of the video captured by the SDK, the SDK scales and crops the custom background image while ensuring that the content of the custom background image is not distorted.
segproperty	Processing properties for background images. See `SegmentationProperty`.
type	The type of the media source to which the filter effect is applied. See `MEDIA_SOURCE_TYPE`.Attention: In this method, this parameter supports only the following two settings: Use the default value `PRIMARY_CAMERA_SOURCE` if you use camera to capture local video. Set this parameter to `CUSTOM_VIDEO_SOURCE` if you use custom video source.

Returns

0: Success.
< 0: Failure.
- -4: The device capabilities do not meet the requirements for the virtual background feature. Agora recommends you try it on devices with higher performance.

◆ setupRemoteVideo()

virtual int agora::rtc::IRtcEngine::setupRemoteVideo ( const VideoCanvas & canvas )

pure virtual

Initializes the video view of a remote user.

This method initializes the video view of a remote stream on the local device. It affects only the video view that the local user sees. Call this method to bind the remote video stream to a video view and to set the rendering and mirror modes of the video view. You need to specify the ID of the remote user in this method. If the remote user ID is unknown to the application, set it after the app receives the onUserJoined callback. To unbind the remote user from the view, set the view parameter to NULL. Once the remote user leaves the channel, the SDK unbinds the remote user. In the scenarios of custom layout for mixed videos on the mobile end, you can call this method and set a separate view for rendering each sub-video stream of the mixed video stream.

Note

To update the rendering or mirror mode of the remote video view during a call, use the setRemoteRenderMode method.
When using the recording service, the app does not need to bind a view, as it does not send a video stream. If your app does not recognize the recording service, bind the remote user to the view when the SDK triggers the onFirstRemoteVideoDecoded callback.

Parameters

canvas The remote video view and settings. See VideoCanvas.

Returns

0: Success.
< 0: Failure.

◆ setupLocalVideo()

virtual int agora::rtc::IRtcEngine::setupLocalVideo ( const VideoCanvas & canvas )

pure virtual

Initializes the local video view.

This method initializes the video view of a local stream on the local device. It only affects the video seen by the local user and does not impact the publishing of the local video. Call this method to bind the local video stream to a video view ( view ) and to set the rendering and mirror modes of the video view. The binding remains valid after leaving the channel. To stop rendering or unbind the local video from the view, set view as NULL. Applicable scenarios: After initialization, call this method to set the local video and then join the channel. In real-time interactive scenarios, if you need to simultaneously view multiple preview frames in the local video preview, and each frame is at a different observation position along the video link, you can repeatedly call this method to set different view s and set different observation positions for each view. For example, by setting the video source to the camera and then configuring two view s with position setting to POSITION_POST_CAPTURER_ORIGIN and POSITION_POST_CAPTURER, you can simultaneously preview the raw, unprocessed video frame and the video frame that has undergone preprocessing (image enhancement effects, virtual background, watermark) in the local video preview. Call timing: You can call this method either before or after joining a channel.

Note: To update only the rendering or mirror mode of the local video view during a call, call setLocalRenderMode(media::base::RENDER_MODE_TYPE renderMode, VIDEO_MIRROR_MODE_TYPE mirrorMode) instead.

Parameters

canvas The local video view and settings. See VideoCanvas.

Returns

0: Success.
< 0: Failure.

◆ setVideoScenario()

virtual int agora::rtc::IRtcEngine::setVideoScenario ( VIDEO_APPLICATION_SCENARIO_TYPE scenarioType )

pure virtual

Sets video application scenarios.

Since: v4.2.0

After successfully calling this method, the SDK will automatically enable the best practice strategies and adjust key performance metrics based on the specified scenario, to optimize the video experience.

Note: Call this method before joining a channel.

Parameters

scenarioType

The type of video application scenario. See VIDEO_APPLICATION_SCENARIO_TYPE.APPLICATION_SCENARIO_MEETING (1) is suitable for meeting scenarios. The SDK automatically enables the following strategies:

In meeting scenarios where low-quality video streams are required to have a high bitrate, the SDK automatically enables multiple technologies used to deal with network congestions, to enhance the performance of the low-quality streams and to ensure the smooth reception by subscribers.
The SDK monitors the number of subscribers to the high-quality video stream in real time and dynamically adjusts its configuration based on the number of subscribers.
- If nobody subscribers to the high-quality stream, the SDK automatically reduces its bitrate and frame rate to save upstream bandwidth.
- If someone subscribes to the high-quality stream, the SDK resets the high-quality stream to the VideoEncoderConfiguration configuration used in the most recent calling of setVideoEncoderConfiguration. If no configuration has been set by the user previously, the following values are used:
  - Resolution: (Windows and macOS) 1280 × 720; (Android and iOS) 960 × 540
  - Frame rate: 15 fps
  - Bitrate: (Windows and macOS) 1600 Kbps; (Android and iOS) 1000 Kbps
The SDK monitors the number of subscribers to the low-quality video stream in real time and dynamically enables or disables it based on the number of subscribers.Note: If the user has called setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) to set that never send low-quality video stream ( DISABLE_SIMULCAST_STREAM ), the dynamic adjustment of the low-quality stream in meeting scenarios will not take effect.
- If nobody subscribes to the low-quality stream, the SDK automatically disables it to save upstream bandwidth.
- If someone subscribes to the low-quality stream, the SDK enables the low-quality stream and resets it to the SimulcastStreamConfig configuration used in the most recent calling of setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig). If no configuration has been set by the user previously, the following values are used:
  - Resolution: 480 × 272
  - Frame rate: 15 fps
  - Bitrate: 500 Kbps APPLICATION_SCENARIO_1V1 (2) This is applicable to the one to one live scenario. To meet the requirements for low latency and high-quality video in this scenario, the SDK optimizes its strategies, improving performance in terms of video quality, first frame rendering, latency on mid-to-low-end devices, and smoothness under weak network conditions.Attention: This enumeration value is only applicable to the broadcaster vs. broadcaster scenario. APPLICATION_SCENARIO_LIVESHOW (3) This is applicable to the show room scenario. In this scenario, fast video rendering and high image quality are crucial. The SDK implements several performance optimizations, including automatically enabling accelerated audio and video frame rendering to minimize first-frame latency (no need to call enableInstantMediaRendering ), and B-frame encoding to achieve better image quality and bandwidth efficiency. The SDK also provides enhanced video quality and smooth playback, even in poor network conditions or on lower-end devices.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -4: Video application scenarios are not supported. Possible reasons include that you use the Voice SDK instead of the Video SDK.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.

◆ setVideoQoEPreference()

virtual int agora::rtc::IRtcEngine::setVideoQoEPreference ( VIDEO_QOE_PREFERENCE_TYPE qoePreference )

pure virtual

Sets the video qoe preference.

Since: v4.2.1

You can call this method to set the expected QoE Preference. The SDK will optimize the video experience for each preference you set.

Parameters

qoePreference The qoe preference type. See #VIDEO_QOE_PREFERENCE_TYPE.

Returns

0: Success.
< 0: Failure.
ERR_FAILED (1): A general error occurs (no specified reason).
ERR_NOT_SUPPORTED (4): Unable to set video application scenario.
ERR_NOT_INITIALIZED (7): The SDK is not initialized.

◆ enableAudio()

virtual int agora::rtc::IRtcEngine::enableAudio ( )

pure virtual

Enables the audio module.

The audio module is enabled by default After calling disableAudio to disable the audio module, you can call this method to re-enable it. Call timing: This method can be called either before or after joining the channel. It is still valid after one leaves channel.

Note

Calling this method will reset the entire engine, resulting in a slow response time. You can use the following methods to independently control a specific function of the audio module based on your actual needs:
- enableLocalAudio: Whether to enable the microphone to create the local audio stream.
- muteLocalAudioStream: Whether to publish the local audio stream.
- muteRemoteAudioStream: Whether to subscribe and play the remote audio stream.
- muteAllRemoteAudioStreams: Whether to subscribe to and play all remote audio streams.
A successful call of this method resets enableLocalAudio, muteRemoteAudioStream, and muteAllRemoteAudioStreams. Proceed it with caution.

Returns

0: Success.
< 0: Failure.

◆ disableAudio()

virtual int agora::rtc::IRtcEngine::disableAudio ( )

pure virtual

Disables the audio module.

The audio module is enabled by default, and you can call this method to disable the audio module. Call timing: This method can be called either before or after joining the channel. It is still valid after one leaves channel.

Note

This method resets the internal engine and takes some time to take effect. Agora recommends using the following API methods to control the audio modules separately:

enableLocalAudio: Whether to enable the microphone to create the local audio stream.
enableLoopbackRecording: Whether to enable loopback audio capturing.
muteLocalAudioStream: Whether to publish the local audio stream.
muteRemoteAudioStream: Whether to subscribe and play the remote audio stream.
muteAllRemoteAudioStreams: Whether to subscribe to and play all remote audio streams.

Returns

0: Success.
< 0: Failure.

◆ setAudioProfile() [1/2]

virtual int agora::rtc::IRtcEngine::setAudioProfile	(	AUDIO_PROFILE_TYPE	profile,
		AUDIO_SCENARIO_TYPE	scenario
	)

pure virtual

Sets the audio profile and audio scenario.

Deprecated:: This method is deprecated. You can use the setAudioProfile(AUDIO_PROFILE_TYPE profile) = 0 method instead. To set the audio scenario, call the initialize method and pass value in the audioScenario member in the RtcEngineContext struct.

Applicable scenarios: This method is suitable for various audio scenarios. You can choose as needed. For example, in scenarios with high audio quality requirements such as music teaching, it is recommended to set profile to AUDIO_PROFILE_MUSIC_HIGH_QUALITY(4) and scenario to AUDIO_SCENARIO_GAME_STREAMING(3). Call timing: You can call this method either before or after joining a channel.

Note: Due to iOS system restrictions, some audio routes cannot be recognized in call volume mode. Therefore, if you need to use an external sound card, it is recommended to set the audio scenario to AUDIO_SCENARIO_GAME_STREAMING(3). In this scenario, the SDK will switch to media volume to avoid this issue.

Parameters

profile	The audio profile, including the sampling rate, bitrate, encoding mode, and the number of channels. See `AUDIO_PROFILE_TYPE`.
scenario	The audio scenarios. Under different audio scenarios, the device uses different volume types. See `AUDIO_SCENARIO_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ setAudioProfile() [2/2]

virtual int agora::rtc::IRtcEngine::setAudioProfile ( AUDIO_PROFILE_TYPE profile )

pure virtual

Sets audio profiles.

If you need to set the audio scenario, you can either call setAudioScenario, or initialize and set the audioScenario in RtcEngineContext. Applicable scenarios: This method is suitable for various audio scenarios. You can choose as needed. For example, in scenarios with high audio quality requirements such as music teaching, it is recommended to set profile to AUDIO_PROFILE_MUSIC_HIGH_QUALITY(4). Call timing: You can call this method either before or after joining a channel.

Parameters

profile The audio profile, including the sampling rate, bitrate, encoding mode, and the number of channels. See AUDIO_PROFILE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ setAudioScenario()

virtual int agora::rtc::IRtcEngine::setAudioScenario ( AUDIO_SCENARIO_TYPE scenario )

pure virtual

Sets audio scenarios.

Applicable scenarios: This method is suitable for various audio scenarios. You can choose as needed. For example, in scenarios such as music teaching that require high sound quality, it is recommended to set scenario to AUDIO_SCENARIO_GAME_STREAMING(3). Call timing: You can call this method either before or after joining a channel.

Note: Due to iOS system restrictions, some audio routes cannot be recognized in call volume mode. Therefore, if you need to use an external sound card, it is recommended to set the audio scenario to AUDIO_SCENARIO_GAME_STREAMING(3). In this scenario, the SDK will switch to media volume to avoid this issue.

Parameters

scenario The audio scenarios. Under different audio scenarios, the device uses different volume types. See AUDIO_SCENARIO_TYPE.

Returns

0: Success.
< 0: Failure.

◆ enableLocalAudio()

virtual int agora::rtc::IRtcEngine::enableLocalAudio ( bool enabled )

pure virtual

Enables or disables the local audio capture.

The audio function is enabled by default when users joining a channel. This method disables or re-enables the local audio function to stop or restart local audio capturing. The difference between this method and muteLocalAudioStream are as follows:

enableLocalAudio: Disables or re-enables the local audio capturing and processing. If you disable or re-enable local audio capturing using the enableLocalAudio method, the local user might hear a pause in the remote audio playback.
muteLocalAudioStream: Sends or stops sending the local audio streams without affecting the audio capture status. Applicable scenarios: This method does not affect receiving the remote audio streams. enableLocalAudio (false) is suitable for scenarios where the user wants to receive remote audio streams without sending locally captured audio. Call timing: You can call this method either before or after joining a channel. Calling it before joining a channel only sets the device state, and it takes effect immediately after you join the channel. Related callbacks: Once the local audio function is disabled or re-enabled, the SDK triggers the onLocalAudioStateChanged callback, which reports LOCAL_AUDIO_STREAM_STATE_STOPPED (0) or LOCAL_AUDIO_STREAM_STATE_RECORDING (1).

Parameters

enabled

true: (Default) Re-enable the local audio function, that is, to start the local audio capturing device (for example, the microphone).
false: Disable the local audio function, that is, to stop local audio capturing.

Returns

0: Success.
< 0: Failure.

◆ muteLocalAudioStream()

virtual int agora::rtc::IRtcEngine::muteLocalAudioStream ( bool mute )

pure virtual

Stops or resumes publishing the local audio stream.

This method is used to control whether to publish the locally captured audio stream. If you call this method to stop publishing locally captured audio streams, the audio capturing device will still work and won't be affected. Call timing: This method can be called either before or after joining the channel. Related callbacks: After successfully calling this method, the local end triggers callback onAudioPublishStateChanged; the remote end triggers onUserMuteAudio and onRemoteAudioStateChanged callbacks.

Parameters

mute	Whether to stop publishing the local audio stream: `true`: Stops publishing the local audio stream. `false`: (Default) Resumes publishing the local audio stream.

Returns

0: Success.
< 0: Failure.

◆ muteAllRemoteAudioStreams()

virtual int agora::rtc::IRtcEngine::muteAllRemoteAudioStreams ( bool mute )

pure virtual

Stops or resumes subscribing to the audio streams of all remote users.

Stops or resumes receiving all remote audio stream.

This method works for all remote users that join or will join a channel using the joinChannel method. It is equivalent to the autoSubscribeAudio member in the ChannelMediaOptions class.

Ensure that you call this method after joining a channel.
If you call muteAllRemoteAudioStreams(true) after joining a channel, the local use stops receiving any audio stream from any user in the channel, including any user who joins the channel after you call this method.
If you call muteAllRemoteAudioStreams(true) after leaving a channel, the local user does not receive any audio stream the next time the user joins a channel.

After you successfully call muteAllRemoteAudioStreams(true), you can take the following actions:

To resume receiving all remote audio streams, call muteAllRemoteAudioStreams(false).
To resume receiving the audio stream of a specified user, call muteRemoteAudioStream(uid, false), where uid is the ID of the user whose audio stream you want to resume receiving.

Note

The result of calling this method is affected by calling enableAudio and disableAudio. Settings in muteAllRemoteAudioStreams stop taking effect if either of the following occurs:
- Calling enableAudio after muteAllRemoteAudioStreams(true).
- Calling disableAudio after muteAllRemoteAudioStreams(false).
This method only works for the channel created by calling joinChannel. To set whether to receive remote audio streams for a specific channel, Agora recommends using autoSubscribeAudio in the ChannelMediaOptions class.

Parameters

mute	Whether to stop receiving remote audio streams: true: Stop receiving any remote audio stream. false: (Default) Resume receiving all remote audio streams.

Returns

0: Success.
< 0: Failure.

After successfully calling this method, the local user stops or resumes subscribing to the audio streams of all remote users, including all subsequent users. Call timing: Call this method after joining a channel.

Note: If you call this method and then call enableAudio or disableAudio, the latest call will prevail. By default, the SDK subscribes to the audio streams of all remote users when joining a channel. To modify this behavior, you can set autoSubscribeAudio to false when calling joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join the channel, which will cancel the subscription to the audio streams of all users upon joining the channel.

Parameters

mute	Whether to stop subscribing to the audio streams of all remote users: `true`: Stops subscribing to the audio streams of all remote users. `false`: (Default) Subscribes to the audio streams of all remote users by default.

Returns

0: Success.
< 0: Failure.

◆ muteRemoteAudioStream()

virtual int agora::rtc::IRtcEngine::muteRemoteAudioStream	(	uid_t	uid,
		bool	mute
	)

pure virtual

Stops or resumes subscribing to the audio stream of a specified user.

Call timing: Call this method after joining a channel. Related callbacks: After a successful method call, the SDK triggers the onAudioSubscribeStateChanged callback.

Parameters

uid	The user ID of the specified user.
mute	Whether to subscribe to the specified remote user's audio stream. `true`: Stop subscribing to the audio stream of the specified user. `false`: (Default) Subscribe to the audio stream of the specified user.

Returns

0: Success.
< 0: Failure.

◆ muteLocalVideoStream()

virtual int agora::rtc::IRtcEngine::muteLocalVideoStream ( bool mute )

pure virtual

Stops or resumes publishing the local video stream.

This method is used to control whether to publish the locally captured video stream. If you call this method to stop publishing locally captured video streams, the video capturing device will still work and won't be affected. Compared to enableLocalVideo (false), which can also cancel the publishing of local video stream by turning off the local video stream capture, this method responds faster. Call timing: This method can be called either before or after joining the channel. Related callbacks: After successfully calling this method, the local end triggers callback onVideoPublishStateChanged; the remote end triggers onUserMuteVideo and onRemoteVideoStateChanged callbacks.

Parameters

mute	Whether to stop publishing the local video stream. `true`: Stop publishing the local video stream. `false`: (Default) Publish the local video stream.

Returns

0: Success.
< 0: Failure.

◆ enableLocalVideo()

virtual int agora::rtc::IRtcEngine::enableLocalVideo ( bool enabled )

pure virtual

Enables/Disables the local video capture.

This method disables or re-enables the local video capture, and does not affect receiving the remote video stream. After calling enableVideo, the local video capture is enabled by default. If you call enableLocalVideo (false) to disable local video capture within the channel, it also simultaneously stops publishing the video stream within the channel. If you want to restart video catpure, you can call enableLocalVideo (true) and then call updateChannelMediaOptions to set the options parameter to publish the locally captured video stream in the channel. After the local video capturer is successfully disabled or re-enabled, the SDK triggers the onRemoteVideoStateChanged callback on the remote client.

Note

You can call this method either before or after joining a channel. However, if you call it before joining, the settings will only take effect once you have joined the channel.
This method enables the internal engine and is valid after leaving the channel.

Parameters

enabled

Whether to enable the local video capture.

true: (Default) Enable the local video capture.
false: Disable the local video capture. Once the local video is disabled, the remote users cannot receive the video stream of the local user, while the local user can still receive the video streams of remote users. When set to false, this method does not require a local camera.

Returns

0: Success.
< 0: Failure.

◆ muteAllRemoteVideoStreams()

virtual int agora::rtc::IRtcEngine::muteAllRemoteVideoStreams ( bool mute )

pure virtual

Stops or resumes subscribing to the video streams of all remote users.

Stops or resumes receiving all remote video streams.

This method works for all remote users that join or will join a channel using the joinChannel method. It is equivalent to the autoSubscribeVideo member in the ChannelMediaOptions class.

Ensure that you call this method after joining a channel.
If you call muteAllRemoteVideoStreams(true) after joining a channel, the local use stops receiving any video stream from any user in the channel, including any user who joins the channel after you call this method.
If you call muteAllRemoteVideoStreams(true) after leaving a channel, the local user does not receive any video stream the next time the user joins a channel.

After you successfully call muteAllRemoteVideoStreams(true), you can take the following actions:

To resume receiving all remote video streams, call muteAllRemoteVideoStreams(false).
To resume receiving the video stream of a specified user, call muteRemoteVideoStream(uid, false), where uid is the ID of the user whose video stream you want to resume receiving.

Note

The result of calling this method is affected by calling enableVideo and disableVideo. Settings in muteAllRemoteVideoStreams stop taking effect if either of the following occurs:
- Calling enableVideo after muteAllRemoteVideoStreams(true).
- Calling disableVideo after muteAllRemoteVideoStreams(false).
This method only works for the channel created by calling joinChannel. To set whether to receive remote audio streams for a specific channel, Agora recommends using autoSubscribeVideo in the ChannelMediaOptions class.

Parameters

mute	Whether to stop receiving remote video streams: true: Stop receiving any remote video stream. false: (Default) Resume receiving all remote video streams.

Returns

0: Success.
< 0: Failure.

After successfully calling this method, the local user stops or resumes subscribing to the video streams of all remote users, including all subsequent users. Call timing: Call this method after joining a channel.

Note: If you call this method and then call enableVideo or disableVideo, the latest call will prevail. By default, the SDK subscribes to the video streams of all remote users when joining a channel. To modify this behavior, you can set autoSubscribeVideo tofalse when calling joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join the channel, which will cancel the subscription to the video streams of all users upon joining the channel.

Parameters

mute	Whether to stop subscribing to the video streams of all remote users. `true`: Stop subscribing to the video streams of all remote users. `false`: (Default) Subscribe to the video streams of all remote users by default.

Returns

0: Success.
< 0: Failure.

◆ setRemoteDefaultVideoStreamType()

virtual int agora::rtc::IRtcEngine::setRemoteDefaultVideoStreamType ( VIDEO_STREAM_TYPE streamType )

pure virtual

Sets the default video stream type to subscribe to.

Depending on the default behavior of the sender and the specific settings when calling setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig), the scenarios for the receiver calling this method are as follows:

The SDK enables low-quality video stream adaptive mode ( AUTO_SIMULCAST_STREAM ) on the sender side by default, meaning only the high-quality video stream is transmitted. Only the receiver with the role of the **host**can call this method to initiate a low-quality video stream request. Once the sender receives the request, it starts automatically sending the low-quality video stream. At this point, all users in the channel can call this method to switch to low-quality video stream subscription mode.
If the sender calls setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) and sets mode to DISABLE_SIMULCAST_STREAM (never send low-quality video stream), then calling this method will have no effect.
If the sender calls setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) and sets mode to ENABLE_SIMULCAST_STREAM (always send low-quality video stream), both the host and audience receivers can call this method to switch to low-quality video stream subscription mode. The SDK will dynamically adjust the size of the corresponding video stream based on the size of the video window to save bandwidth and computing resources. The default aspect ratio of the low-quality video stream is the same as that of the high-quality video stream. According to the current aspect ratio of the high-quality video stream, the system will automatically allocate the resolution, frame rate, and bitrate of the low-quality video stream. Call timing: Call this method before joining a channel. The SDK does not support changing the default subscribed video stream type after joining a channel.

Note: If you call both this method and setRemoteVideoStreamType, the setting of setRemoteVideoStreamType takes effect.

Parameters

streamType The default video-stream type. See VIDEO_STREAM_TYPE.

Returns

0: Success.
< 0: Failure.

◆ muteRemoteVideoStream()

virtual int agora::rtc::IRtcEngine::muteRemoteVideoStream	(	uid_t	uid,
		bool	mute
	)

pure virtual

Stops or resumes subscribing to the video stream of a specified user.

Call timing: Call this method after joining a channel. Related callbacks: After a successful method call, the SDK triggers the onVideoSubscribeStateChanged callback.

Parameters

uid	The user ID of the specified user.
mute	Whether to subscribe to the specified remote user's video stream. `true`: Stop subscribing to the video streams of the specified user. `false`: (Default) Subscribe to the video stream of the specified user.

Returns

0: Success.
< 0: Failure.

◆ setRemoteVideoStreamType()

virtual int agora::rtc::IRtcEngine::setRemoteVideoStreamType	(	uid_t	uid,
		VIDEO_STREAM_TYPE	streamType
	)

pure virtual

Sets the video stream type to subscribe to.

Depending on the default behavior of the sender and the specific settings when calling setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig), the scenarios for the receiver calling this method are as follows:

The SDK enables low-quality video stream adaptive mode ( AUTO_SIMULCAST_STREAM ) on the sender side by default, meaning only the high-quality video stream is transmitted. Only the receiver with the role of the **host**can call this method to initiate a low-quality video stream request. Once the sender receives the request, it starts automatically sending the low-quality video stream. At this point, all users in the channel can call this method to switch to low-quality video stream subscription mode.
If the sender calls setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) and sets mode to DISABLE_SIMULCAST_STREAM (never send low-quality video stream), then calling this method will have no effect.
If the sender calls setDualStreamMode(SIMULCAST_STREAM_MODE mode, const SimulcastStreamConfig& streamConfig) and sets mode to ENABLE_SIMULCAST_STREAM (always send low-quality video stream), both the host and audience receivers can call this method to switch to low-quality video stream subscription mode. The SDK will dynamically adjust the size of the corresponding video stream based on the size of the video window to save bandwidth and computing resources. The default aspect ratio of the low-quality video stream is the same as that of the high-quality video stream. According to the current aspect ratio of the high-quality video stream, the system will automatically allocate the resolution, frame rate, and bitrate of the low-quality video stream.

Note

You can call this method either before or after joining a channel.
If you call both this method and setRemoteDefaultVideoStreamType, the setting of this method takes effect.

Parameters

uid	The user ID.
streamType	The video stream type, see `VIDEO_STREAM_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ setRemoteVideoSubscriptionOptions()

virtual int agora::rtc::IRtcEngine::setRemoteVideoSubscriptionOptions	(	uid_t	uid,
		const VideoSubscriptionOptions &	options
	)

pure virtual

Options for subscribing to remote video streams.

When a remote user has enabled dual-stream mode, you can call this method to choose the option for subscribing to the video streams sent by the remote user. The default subscription behavior of the SDK for remote video streams depends on the type of registered video observer:

If the IVideoFrameObserver observer is registered, the default is to subscribe to both raw data and encoded data.
If the IVideoEncodedFrameObserver observer is registered, the default is to subscribe only to the encoded data.
If both types of observers are registered, the default behavior follows the last registered video observer. For example, if the last registered observer is the IVideoFrameObserver observer, the default is to subscribe to both raw data and encoded data. If you want to modify the default behavior, or set different subscription options for different uids, you can call this method to set it.

Parameters

uid	The user ID of the remote user.
options	The video subscription options. See `VideoSubscriptionOptions`.

Returns

0: Success.
< 0: Failure.

◆ setSubscribeAudioBlocklist()

virtual int agora::rtc::IRtcEngine::setSubscribeAudioBlocklist	(	uid_t *	uidList,
		int	uidNumber
	)

pure virtual

Sets the blocklist of subscriptions for audio streams.

You can call this method to specify the audio streams of a user that you do not want to subscribe to.

Note

You can call this method either before or after joining a channel.
The blocklist is not affected by the setting in muteRemoteAudioStream, muteAllRemoteAudioStreams, and autoSubscribeAudio in ChannelMediaOptions.
Once the blocklist of subscriptions is set, it is effective even if you leave the current channel and rejoin the channel.
If a user is added in the allowlist and blocklist at the same time, only the blocklist takes effect.

Parameters

uidList The user ID list of users that you do not want to subscribe to. If you want to specify the audio streams of a user that you do not want to subscribe to, add the user ID in this list. If you want to remove a user from the blocklist, you need to call the setSubscribeAudioBlocklist method to update the user ID list; this means you only add the uid of users that you do not want to subscribe to in the new user ID list.

uidNumber The number of users in the user ID list.

Returns

0: Success.
< 0: Failure.

◆ setSubscribeAudioAllowlist()

virtual int agora::rtc::IRtcEngine::setSubscribeAudioAllowlist	(	uid_t *	uidList,
		int	uidNumber
	)

pure virtual

Sets the allowlist of subscriptions for audio streams.

You can call this method to specify the audio streams of a user that you want to subscribe to.

Note

You can call this method either before or after joining a channel.
The allowlist is not affected by the setting in muteRemoteAudioStream, muteAllRemoteAudioStreams and autoSubscribeAudio in ChannelMediaOptions.
Once the allowlist of subscriptions is set, it is effective even if you leave the current channel and rejoin the channel.
If a user is added in the allowlist and blocklist at the same time, only the blocklist takes effect.

Parameters

uidList	The user ID list of users that you want to subscribe to. If you want to specify the audio streams of a user for subscription, add the user ID in this list. If you want to remove a user from the allowlist, you need to call the `setSubscribeAudioAllowlist` method to update the user ID list; this means you only add the `uid` of users that you want to subscribe to in the new user ID list.
uidNumber	The number of users in the user ID list.

Returns

0: Success.
< 0: Failure.

◆ setSubscribeVideoBlocklist()

virtual int agora::rtc::IRtcEngine::setSubscribeVideoBlocklist	(	uid_t *	uidList,
		int	uidNumber
	)

pure virtual

Sets the blocklist of subscriptions for video streams.

You can call this method to specify the video streams of a user that you do not want to subscribe to.

Note

You can call this method either before or after joining a channel.
The blocklist is not affected by the setting in muteRemoteVideoStream, muteAllRemoteVideoStreams and autoSubscribeAudio in ChannelMediaOptions.
Once the blocklist of subscriptions is set, it is effective even if you leave the current channel and rejoin the channel.
If a user is added in the allowlist and blocklist at the same time, only the blocklist takes effect.

Parameters

uidList The user ID list of users that you do not want to subscribe to. If you want to specify the video streams of a user that you do not want to subscribe to, add the user ID of that user in this list. If you want to remove a user from the blocklist, you need to call the setSubscribeVideoBlocklist method to update the user ID list; this means you only add the uid of users that you do not want to subscribe to in the new user ID list.

uidNumber The number of users in the user ID list.

Returns

0: Success.
< 0: Failure.

◆ setSubscribeVideoAllowlist()

virtual int agora::rtc::IRtcEngine::setSubscribeVideoAllowlist	(	uid_t *	uidList,
		int	uidNumber
	)

pure virtual

Sets the allowlist of subscriptions for video streams.

You can call this method to specify the video streams of a user that you want to subscribe to.

Note

You can call this method either before or after joining a channel.
The allowlist is not affected by the setting in muteRemoteVideoStream, muteAllRemoteVideoStreams and autoSubscribeAudio in ChannelMediaOptions.
Once the allowlist of subscriptions is set, it is effective even if you leave the current channel and rejoin the channel.
If a user is added in the allowlist and blocklist at the same time, only the blocklist takes effect.

Parameters

uidList The user ID list of users that you want to subscribe to. If you want to specify the video streams of a user for subscription, add the user ID of that user in this list. If you want to remove a user from the allowlist, you need to call the setSubscribeVideoAllowlist method to update the user ID list; this means you only add the uid of users that you want to subscribe to in the new user ID list.

uidNumber The number of users in the user ID list.

Returns

0: Success.
< 0: Failure.

◆ enableAudioVolumeIndication()

virtual int agora::rtc::IRtcEngine::enableAudioVolumeIndication	(	int	interval,
		int	smooth,
		bool	reportVad
	)

pure virtual

Enables the reporting of users' volume indication.

This method enables the SDK to regularly report the volume information to the app of the local user who sends a stream and remote users (three users at most) whose instantaneous volumes are the highest. Call timing: This method can be called either before or after joining the channel. Related callbacks: The SDK triggers the onAudioVolumeIndication callback according to the interval you set if this method is successfully called and there are users publishing streams in the channel.

Parameters

interval	Sets the time interval between two consecutive volume indications: ≤ 0: Disables the volume indication. > 0: Time interval (ms) between two consecutive volume indications. Ensure this parameter is set to a value greater than 10, otherwise you will not receive the `onAudioVolumeIndication` callback. Agora recommends that this value is set as greater than 100.
smooth	The smoothing factor that sets the sensitivity of the audio volume indicator. The value ranges between 0 and 10. The recommended value is 3. The greater the value, the more sensitive the indicator.
reportVad	- `true`: Enables the voice activity detection of the local user. Once it is enabled, the `vad` parameter of the `onAudioVolumeIndication` callback reports the voice activity status of the local user. `false`: (Default) Disables the voice activity detection of the local user. Once it is disabled, the `vad` parameter of the `onAudioVolumeIndication` callback does not report the voice activity status of the local user, except for the scenario where the engine automatically detects the voice activity of the local user.

Returns

0: Success.
< 0: Failure.

◆ startAudioRecording() [1/3]

virtual int agora::rtc::IRtcEngine::startAudioRecording	(	const char *	filePath,
		AUDIO_RECORDING_QUALITY_TYPE	quality
	)

pure virtual

Starts client-side audio recording with recording configuration.

The SDK supports recording on the client during a call. After calling this method, you can record the audio of users in the channel and obtain a recording file. The recording file supports the following formats only:

WAV: Higher audio fidelity, larger file size. For example, with a sample rate of 32000 Hz, a 10-minute recording is about 73 MB.
AAC: Lower audio fidelity, smaller file size. For example, with a sample rate of 32000 Hz and recording quality set to AUDIO_RECORDING_QUALITY_MEDIUM, a 10-minute recording is about 2 MB. Recording automatically stops when the user leaves the channel. Call timing: This method must be called after joining a channel.

Parameters

config Recording configuration. See AudioRecordingConfiguration.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ startAudioRecording() [2/3]

virtual int agora::rtc::IRtcEngine::startAudioRecording	(	const char *	filePath,
		int	sampleRate,
		AUDIO_RECORDING_QUALITY_TYPE	quality
	)

pure virtual

Starts client-side audio recording and sets the recording sample rate.

The SDK supports recording on the client during a call. After calling this method, you can record the audio of all users in the channel and obtain a recording file that includes all voices. The recording file supports the following formats only:

.wav: Large file size, higher audio fidelity.
.aac: Smaller file size, lower audio fidelity.

Note

Make sure the path you specify in this method exists and is writable.
This method must be called after joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options). If leaveChannel(const LeaveChannelOptions& options) is called while recording is in progress, the recording will automatically stop.
To ensure recording quality, when sampleRate is set to 44.1 kHz or 48 kHz, it is recommended to set quality to AUDIO_RECORDING_QUALITY_MEDIUM or AUDIO_RECORDING_QUALITY_HIGH.

Parameters

filePath	The absolute path where the recording file will be saved locally, including the file name and extension. For example: `C:\music\audio.aac`. Note: Make sure the specified path exists and is writable.
sampleRate	Recording sample rate (Hz). You can set it to one of the following values: 16000 32000 (default) 44100 48000
quality	Recording quality. See `AUDIO_RECORDING_QUALITY_TYPE`.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ startAudioRecording() [3/3]

virtual int agora::rtc::IRtcEngine::startAudioRecording ( const AudioRecordingConfiguration & config )

pure virtual

Starts an audio recording.

The SDK allows recording during a call, which supports either one of the following two formats:

.wav: Large file size with high sound fidelity
.aac: Small file size with low sound fidelity

Ensure that the directory to save the recording file exists and is writable. This method is usually called after the joinChannel() method. The recording automatically stops when the leaveChannel() method is called.

Parameters

config Audio recording config.

Returns

0: Success.
< 0: Failure.

◆ registerAudioEncodedFrameObserver()

virtual int agora::rtc::IRtcEngine::registerAudioEncodedFrameObserver	(	const AudioEncodedFrameObserverConfig &	config,
		IAudioEncodedFrameObserver *	observer
	)

pure virtual

Registers an encoded audio observer.

Note

Call this method after joining a channel.
You can call this method or startAudioRecording [3/3] to set the recording type and quality of audio files, but Agora does not recommend using this method and startAudioRecording [3/3] at the same time. Only the method called later will take effect.

Parameters

config	Observer settings for the encoded audio. See `AudioEncodedFrameObserverConfig`.
observer	The encoded audio observer. See `IAudioEncodedFrameObserver`.

Returns

0: Success.
< 0: Failure.

◆ stopAudioRecording()

virtual int agora::rtc::IRtcEngine::stopAudioRecording ( )

pure virtual

Stops client-side audio recording.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ createMediaPlayer()

virtual agora_refptr<IMediaPlayer> agora::rtc::IRtcEngine::createMediaPlayer ( )

pure virtual

Creates a media player object.

Before calling any APIs in the IMediaPlayer class, you need to call this method to create an instance of the media player. If you need to create multiple instances, you can call this method multiple times. Call timing: You can call this method either before or after joining a channel.

Returns

An IMediaPlayer object, if the method call succeeds.
An empty pointer, if the method call fails.

◆ destroyMediaPlayer()

virtual int agora::rtc::IRtcEngine::destroyMediaPlayer ( agora_refptr< IMediaPlayer > media_player )

pure virtual

Destroys the media player instance.

Parameters

media_player IMediaPlayer object.

Returns

≥ 0: Success. Returns the ID of media player instance.
< 0: Failure.

◆ createMediaRecorder()

virtual agora_refptr<IMediaRecorder> agora::rtc::IRtcEngine::createMediaRecorder ( const RecorderStreamInfo & info )

pure virtual

Creates an audio and video recording object.

Before starting to record audio and video streams, you need to call this method to create a recording object. The SDK supports recording multiple audio and video streams from local or remote users. You can call this method multiple times to create recording objects, and use the info parameter to specify the channel name and the user ID of the stream to be recorded. After successful creation, you need to call setMediaRecorderObserver to register an observer for the recording object to listen for related callbacks, and then call startRecording to begin recording.

Parameters

info	Information about the audio and video stream to be recorded. See `RecorderStreamInfo`.

Returns

If the method call succeeds: Returns an IMediaRecorder object.
If the method call fails: Returns a null pointer.

◆ destroyMediaRecorder()

virtual int agora::rtc::IRtcEngine::destroyMediaRecorder ( agora_refptr< IMediaRecorder > mediaRecorder )

pure virtual

Destroys an audio and video recording object.

When you no longer need to record audio and video streams, you can call this method to destroy the corresponding recording object. If recording is in progress, call stopRecording first, then call this method to destroy the recording object.

Parameters

mediaRecorder The IMediaRecorder object to be destroyed.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ startAudioMixing() [1/2]

virtual int agora::rtc::IRtcEngine::startAudioMixing	(	const char *	filePath,
		bool	loopback,
		int	cycle
	)

pure virtual

Starts playing the music file.

Starts playing and mixing the music file.

This method mixes the specified local audio file with the audio stream from the microphone. You can choose whether the other user can hear the local audio playback and specify the number of playback loops. This method also supports online music playback.

After calling this method successfully, the SDK triggers the

onAudioMixingStateChanged (PLAY) callback on the local client. When the audio mixing file playback finishes after calling this method, the SDK triggers the onAudioMixingStateChanged (STOPPED) callback on the local client.

Note

Call this method after joining a channel, otherwise issues may occur.
If the local audio mixing file does not exist, or if the SDK does not support the file format or cannot access the music file URL, the SDK returns #WARN_AUDIO_MIXING_OPEN_ERROR (701).
If you want to play an online music file, ensure that the time interval between calling this method is more than 100 ms, or the AUDIO_MIXING_ERROR_TOO_FREQUENT_CALL(702) error code occurs.

Parameters

filePath	Pointer to the absolute path (including the suffixes of the filename) of the local or online audio file to mix, for example, c:/music/au dio.mp4. Supported audio formats: 3GP, ASF, ADTS, AVI, MP3, MP4, MPEG-4, SAMI, and WAVE.
loopback	Sets which user can hear the audio mixing: true: Only the local user can hear the audio mixing. false: Both users can hear the audio mixing.
cycle	Sets the number of playback loops: Positive integer: Number of playback loops. `-1`: Infinite playback loops.

Returns

0: Success.
< 0: Failure.

For the audio file formats supported by this method, see What formats of audio files does the Agora RTC SDK support. If the local music file does not exist, the SDK does not support the file format, or the the SDK cannot access the music file URL, the SDK reports AUDIO_MIXING_REASON_CAN_NOT_OPEN. Call timing: You can call this method either before or after joining a channel. Related callbacks: A successful method call triggers the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback. When the audio mixing file playback finishes, the SDK triggers the onAudioMixingStateChanged (AUDIO_MIXING_STATE_STOPPED) callback on the local client.

Note

If you call this method to play short sound effect files, you may encounter playback failure. Agora recommends using playEffect instead to play such files.
If you need to call this method multiple times, ensure that the time interval between calling this method is more than 500 ms.
On Android, there are following considerations:
- To use this method, ensure that the Android device is v4.2 or later, and the API version is v16 or later.
- If you need to play an online music file, Agora does not recommend using the redirected URL address. Some Android devices may fail to open a redirected URL address.
- If you call this method on an emulator, ensure that the music file is in the /sdcard/ directory and the format is MP3.

Parameters

filePath	The file path. The SDK supports URLs and absolute path of local files. The absolute path needs to be accurate to the file name and extension. Supported audio formats include MP3, AAC, M4A, MP4, WAV, and 3GP. See `Supported Audio Formats`. Attention: If you have preloaded an audio effect into memory by calling `preloadEffect`, ensure that the value of this parameter is the same as that of `filePath` in `preloadEffect`.
loopback	Whether to only play music files on the local client: `true`: Only play music files on the local client so that only the local user can hear the music. `false`: Publish music files to remote clients so that both the local user and remote users can hear the music.
cycle	The number of times the music file plays. >0: The number of times for playback. For example, 1 represents playing 1 time. -1: Play the audio file in an infinite loop.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -3: The SDK is not ready.
  - The audio module is disabled.
  - The program is not complete.
  - The initialization of IRtcEngine fails. Reinitialize the IRtcEngine.

◆ startAudioMixing() [2/2]

virtual int agora::rtc::IRtcEngine::startAudioMixing	(	const char *	filePath,
		bool	loopback,
		int	cycle,
		int	startPos
	)

pure virtual

Starts playing the music file.

Starts playing and mixing the music file.

This method mixes the specified local audio file with the audio stream from the microphone. You can choose whether the other user can hear the local audio playback and specify the number of playback loops. This method also supports online music playback.

After calling this method successfully, the SDK triggers the

onAudioMixingStateChanged (PLAY) callback on the local client. When the audio mixing file playback finishes after calling this method, the SDK triggers the onAudioMixingStateChanged (STOPPED) callback on the local client.

Note

Call this method after joining a channel, otherwise issues may occur.
If the local audio mixing file does not exist, or if the SDK does not support the file format or cannot access the music file URL, the SDK returns #WARN_AUDIO_MIXING_OPEN_ERROR (701).
If you want to play an online music file, ensure that the time interval between calling this method is more than 100 ms, or the AUDIO_MIXING_ERROR_TOO_FREQUENT_CALL(702) error code occurs.

Parameters

filePath	Pointer to the absolute path (including the suffixes of the filename) of the local or online audio file to mix, for example, c:/music/au dio.mp4. Supported audio formats: 3GP, ASF, ADTS, AVI, MP3, MP4, MPEG-4, SAMI, and WAVE.
loopback	Sets which user can hear the audio mixing: true: Only the local user can hear the audio mixing. false: Both users can hear the audio mixing.
cycle	Sets the number of playback loops: Positive integer: Number of playback loops. `-1`: Infinite playback loops.
startPos	The playback position (ms) of the music file.

Returns

0: Success.
< 0: Failure.

For the audio file formats supported by this method, see What formats of audio files does the Agora RTC SDK support. If the local music file does not exist, the SDK does not support the file format, or the the SDK cannot access the music file URL, the SDK reports AUDIO_MIXING_REASON_CAN_NOT_OPEN. Call timing: You can call this method either before or after joining a channel. Related callbacks: A successful method call triggers the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback. When the audio mixing file playback finishes, the SDK triggers the onAudioMixingStateChanged (AUDIO_MIXING_STATE_STOPPED) callback on the local client.

Note

If you call this method to play short sound effect files, you may encounter playback failure. Agora recommends using playEffect instead to play such files.
If you need to call this method multiple times, ensure that the time interval between calling this method is more than 500 ms.
On Android, there are following considerations:
- To use this method, ensure that the Android device is v4.2 or later, and the API version is v16 or later.
- If you need to play an online music file, Agora does not recommend using the redirected URL address. Some Android devices may fail to open a redirected URL address.
- If you call this method on an emulator, ensure that the music file is in the /sdcard/ directory and the format is MP3.

Parameters

filePath	File path: Android: The file path, which needs to be accurate to the file name and suffix. Agora supports URL addresses, absolute paths, or file paths that start with `/assets/`. You might encounter permission issues if you use an absolute path to access a local file, so Agora recommends using a URI address instead. For example`: content://com.android.providers.media.documents/document/audio%3A14441` Windows: The absolute path or URL address (including the suffixes of the filename) of the audio effect file. For example`: C:\music\audio.mp4`.
loopback	Whether to only play music files on the local client: `true`: Only play music files on the local client so that only the local user can hear the music. `false`: Publish music files to remote clients so that both the local user and remote users can hear the music.
cycle	The number of times the music file plays. >0: The number of times for playback. For example, 1 represents playing 1 time. -1: Play the audio file in an infinite loop.
startPos	The playback position (ms) of the music file.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -3: The SDK is not ready.
  - The audio module is disabled.
  - The program is not complete.
  - The initialization of IRtcEngine fails. Reinitialize the IRtcEngine.

◆ stopAudioMixing()

virtual int agora::rtc::IRtcEngine::stopAudioMixing ( )

pure virtual

Stops playing the music file.

After calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) to play a music file, you can call this method to stop the playing. If you only need to pause the playback, call pauseAudioMixing. Call timing: Call this method after joining a channel.

Returns

0: Success.
< 0: Failure.

◆ pauseAudioMixing()

virtual int agora::rtc::IRtcEngine::pauseAudioMixing ( )

pure virtual

Pauses playing and mixing the music file.

After calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) to play a music file, you can call this method to pause the playing. If you need to stop the playback, call stopAudioMixing. Call timing: Call this method after joining a channel.

Returns

0: Success.
< 0: Failure.

◆ resumeAudioMixing()

virtual int agora::rtc::IRtcEngine::resumeAudioMixing ( )

pure virtual

Resumes playing and mixing the music file.

After calling pauseAudioMixing to pause the playback, you can call this method to resume the playback. Call timing: Call this method after joining a channel.

Returns

0: Success.
< 0: Failure.

◆ selectAudioTrack()

virtual int agora::rtc::IRtcEngine::selectAudioTrack ( int index )

pure virtual

Selects the audio track used during playback.

After getting the track index of the audio file, you can call this method to specify any track to play. For example, if different tracks of a multi-track file store songs in different languages, you can call this method to set the playback language.

Note

For the supported formats of audio files, see https://docs.agora.io/en/help/general-product-inquiry/audio_format#extended-audio-file-formats.
You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Parameters

index The audio track you want to specify. The value should be greater than 0 and less than that of returned by getAudioTrackCount.

Returns

0: Success.
< 0: Failure.

◆ getAudioTrackCount()

virtual int agora::rtc::IRtcEngine::getAudioTrackCount ( )

pure virtual

Gets the index of audio tracks of the current music file.

Note: You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Returns

The SDK returns the index of the audio tracks if the method call succeeds.
< 0: Failure.

◆ adjustAudioMixingVolume()

virtual int agora::rtc::IRtcEngine::adjustAudioMixingVolume ( int volume )

pure virtual

Adjusts the volume during audio mixing.

This method adjusts the audio mixing volume on both the local client and remote clients. Call timing: Call this method after startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos).

Note: This method does not affect the volume of the audio file set in the playEffect method.

Parameters

volume Audio mixing volume. The value ranges between 0 and 100. The default value is 100, which means the original volume.

Returns

0: Success.
< 0: Failure.

◆ adjustAudioMixingPublishVolume()

virtual int agora::rtc::IRtcEngine::adjustAudioMixingPublishVolume ( int volume )

pure virtual

Adjusts the volume of audio mixing for publishing.

This method adjusts the volume of audio mixing for publishing (sending to other users). Call timing: Call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Parameters

volume The volume of audio mixing for local playback. The value ranges between 0 and 100 (default). 100 represents the original volume.

Returns

0: Success.
< 0: Failure.

◆ getAudioMixingPublishVolume()

virtual int agora::rtc::IRtcEngine::getAudioMixingPublishVolume ( )

pure virtual

Retrieves the audio mixing volume for publishing.

This method helps troubleshoot audio volume‑related issues.

Note: You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Returns

≥ 0: The audio mixing volume, if this method call succeeds. The value range is [0,100].
< 0: Failure.

◆ adjustAudioMixingPlayoutVolume()

virtual int agora::rtc::IRtcEngine::adjustAudioMixingPlayoutVolume ( int volume )

pure virtual

Adjusts the volume of audio mixing for local playback.

Call timing: You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Parameters

volume The volume of audio mixing for local playback. The value ranges between 0 and 100 (default). 100 represents the original volume.

Returns

0: Success.
< 0: Failure.

◆ getAudioMixingPlayoutVolume()

virtual int agora::rtc::IRtcEngine::getAudioMixingPlayoutVolume ( )

pure virtual

Retrieves the audio mixing volume for local playback.

You can call this method to get the local playback volume of the mixed audio file, which helps in troubleshooting volume‑related issues. Call timing: Call this method after startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Returns

≥ 0: The audio mixing volume, if this method call succeeds. The value range is [0,100].
< 0: Failure.

◆ getAudioMixingDuration()

virtual int agora::rtc::IRtcEngine::getAudioMixingDuration ( )

pure virtual

Retrieves the duration (ms) of the music file.

Retrieves the total duration (ms) of the audio. Call timing: Call this method after startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Returns

≥ 0: The audio mixing duration, if this method call succeeds.
< 0: Failure.

◆ getAudioMixingCurrentPosition()

virtual int agora::rtc::IRtcEngine::getAudioMixingCurrentPosition ( )

pure virtual

Retrieves the playback position (ms) of the music file.

Retrieves the playback position (ms) of the audio.

Note

You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.
If you need to call getAudioMixingCurrentPosition multiple times, ensure that the time interval between calling this method is more than 500 ms.

Returns

≥ 0: The current playback position (ms) of the audio mixing, if this method call succeeds. 0 represents that the current music file does not start playing.
< 0: Failure.

◆ setAudioMixingPosition()

virtual int agora::rtc::IRtcEngine::setAudioMixingPosition ( int pos )

pure virtual

Sets the audio mixing position.

Call this method to set the playback position of the music file to a different starting position (the default plays from the beginning). Call timing: Call this method after startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Parameters

pos	Integer. The playback position (ms).

Returns

0: Success.
< 0: Failure.

◆ setAudioMixingDualMonoMode()

virtual int agora::rtc::IRtcEngine::setAudioMixingDualMonoMode ( media::AUDIO_MIXING_DUAL_MONO_MODE mode )

pure virtual

Sets the channel mode of the current audio file.

In a stereo music file, the left and right channels can store different audio data. According to your needs, you can set the channel mode to original mode, left channel mode, right channel mode, or mixed channel mode. Applicable scenarios: For example, in the KTV scenario, the left channel of the music file stores the musical accompaniment, and the right channel stores the original singer's vocals. You can set according to actual needs:

If you only want to hear the accompaniment, use this method to set the audio file's channel mode to left channel mode.
If you need to hear both the accompaniment and the original vocals simultaneously, call this method to set the channel mode to mixed mode. Call timing: Call this method after startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Note: This method only applies to stereo audio files.

Parameters

mode	The channel mode. See `AUDIO_MIXING_DUAL_MONO_MODE`.

Returns

0: Success.
< 0: Failure.

◆ setAudioMixingPitch()

virtual int agora::rtc::IRtcEngine::setAudioMixingPitch ( int pitch )

pure virtual

Sets the pitch of the local music file.

When a local music file is mixed with a local human voice, call this method to set the pitch of the local music file only. Call timing: You need to call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) and receiving the onAudioMixingStateChanged (AUDIO_MIXING_STATE_PLAYING) callback.

Parameters

pitch Sets the pitch of the local music file by the chromatic scale. The default value is 0, which means keeping the original pitch. The value ranges from -12 to 12, and the pitch value between consecutive values is a chromatic value. The greater the absolute value of this parameter, the higher or lower the pitch of the local music file.

Returns

0: Success.
< 0: Failure.

◆ setAudioMixingPlaybackSpeed()

virtual int agora::rtc::IRtcEngine::setAudioMixingPlaybackSpeed ( int speed )

pure virtual

Sets the playback speed of the current audio file.

Ensure you call this method after calling startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) receiving the onAudioMixingStateChanged callback reporting the state as AUDIO_MIXING_STATE_PLAYING.

Parameters

speed

The playback speed. Agora recommends that you set this to a value between 50 and 400, defined as follows:

50: Half the original speed.
100: The original speed.
400: 4 times the original speed.

Returns

0: Success.
< 0: Failure.

◆ getEffectsVolume()

virtual int agora::rtc::IRtcEngine::getEffectsVolume ( )

pure virtual

Retrieves the volume of the audio effects.

The volume is an integer ranging from 0 to 100. The default value is 100, which means the original volume.

Note: Call this method after playEffect.

Returns

Volume of the audio effects, if this method call succeeds.
< 0: Failure.

◆ setEffectsVolume()

virtual int agora::rtc::IRtcEngine::setEffectsVolume ( int volume )

pure virtual

Sets the volume of the audio effects.

Call timing: Call this method after playEffect.

Parameters

volume The playback volume. The value range is [0, 100]. The default value is 100, which represents the original volume.

Returns

0: Success.
< 0: Failure.

◆ preloadEffect()

virtual int agora::rtc::IRtcEngine::preloadEffect	(	int	soundId,
		const char *	filePath,
		int	startPos = `0`
	)

pure virtual

Preloads a specified audio effect file into the memory.

Ensure the size of all preloaded files does not exceed the limit. For the audio file formats supported by this method, see What formats of audio files does the Agora RTC SDK support. Call timing: Agora recommends that you call this method before joining a channel.

Note

If preloadEffect is called before playEffect is executed, the file resource will not be closed after playEffect. The next time playEffect is executed, it will directly seek to play at the beginning.
If preloadEffect is not called before playEffect is executed, the resource will be destroyed after playEffect. The next time playEffect is executed, it will try to reopen the file and play it from the beginning.

Parameters

soundId	The audio effect ID. The ID of each audio effect file is unique.
filePath	File path: Android: The file path, which needs to be accurate to the file name and suffix. Agora supports URL addresses, absolute paths, or file paths that start with `/assets/`. You might encounter permission issues if you use an absolute path to access a local file, so Agora recommends using a URI address instead. For example: `content://com.android.providers.media.documents/document/audio%3A14441` Windows: The absolute path or URL address (including the suffixes of the filename) of the audio effect file. For example: `C:\music\audio.mp4`. iOS or macOS: The absolute path or URL address (including the suffixes of the filename) of the audio effect file. For example: `/var/mobile/Containers/Data/audio.mp4`.
startPos	The playback position (ms) of the audio effect file.

Returns

0: Success.
< 0: Failure.

◆ playEffect()

virtual int agora::rtc::IRtcEngine::playEffect	(	int	soundId,
		const char *	filePath,
		int	loopCount,
		double	pitch,
		double	pan,
		int	gain,
		bool	publish = `false`,
		int	startPos = `0`
	)

pure virtual

Plays the specified local or online audio effect file.

To play multiple audio effect files at the same time, call this method multiple times with different soundId and filePath. To achieve the optimal user experience, Agora recommends that you do not playing more than three audio files at the same time. Call timing: You can call this method either before or after joining a channel. Related callbacks: After the playback of an audio effect file completes, the SDK triggers the onAudioEffectFinished callback.

Note

If you need to play an online audio effect file, Agora recommends that you cache the online audio effect file to your local device, call preloadEffect to preload the file into memory, and then call this method to play the audio effect. Otherwise, you might encounter playback failures or no sound during playback due to loading timeouts or failures.
If preloadEffect is called before playEffect is executed, the file resource will not be closed after playEffect. The next time playEffect is executed, it will directly seek to play at the beginning.
If preloadEffect is not called before playEffect is executed, the resource will be destroyed after playEffect. The next time playEffect is executed, it will try to reopen the file and play it from the beginning.

Parameters

soundId	The audio effect ID. The ID of each audio effect file is unique.Attention: If you have preloaded an audio effect into memory by calling `preloadEffect`, ensure that the value of this parameter is the same as that of `soundId` in `preloadEffect`.
filePath	The file path. The SDK supports URLs and absolute path of local files. The absolute path needs to be accurate to the file name and extension. Supported audio formats include MP3, AAC, M4A, MP4, WAV, and 3GP. See `Supported Audio Formats`. Attention: If you have preloaded an audio effect into memory by calling `preloadEffect`, ensure that the value of this parameter is the same as that of `filePath` in `preloadEffect`.
loopCount	The number of times the audio effect loops. ≥ 0: The number of playback times. For example, 1 means looping one time, which means playing the audio effect two times in total. -1: Play the audio file in an infinite loop.
pitch	The pitch of the audio effect. The value range is 0.5 to 2.0. The default value is 1.0, which means the original pitch. The lower the value, the lower the pitch.
pan	The spatial position of the audio effect. The value ranges between -1.0 and 1.0: -1.0: The audio effect is heard on the left of the user. 0.0: The audio effect is heard in front of the user. 1.0: The audio effect is heard on the right of the user.
gain	The volume of the audio effect. The value range is 0.0 to 100.0. The default value is 100.0, which means the original volume. The smaller the value, the lower the volume.
publish	Whether to publish the audio effect to the remote users: `true`: Publish the audio effect to the remote users. Both the local user and remote users can hear the audio effect. `false`: Do not publish the audio effect to the remote users. Only the local user can hear the audio effect.
startPos	The playback position (ms) of the audio effect file.

Returns

0: Success.
< 0: Failure.

◆ playAllEffects()

virtual int agora::rtc::IRtcEngine::playAllEffects	(	int	loopCount,
		double	pitch,
		double	pan,
		int	gain,
		bool	publish = `false`
	)

pure virtual

Plays all audio effect files.

After calling preloadEffect multiple times to preload multiple audio effects into the memory, you can call this method to play all the specified audio effects for all users in the channel.

Parameters

loopCount	The number of times the audio effect loops: -1: Play the audio effect files in an indefinite loop until you call `stopEffect` or `stopAllEffects`. 0: Play the audio effect once. 1: Play the audio effect twice.
pitch	The pitch of the audio effect. The value ranges between 0.5 and 2.0. The default value is 1.0 (original pitch). The lower the value, the lower the pitch.
pan	The spatial position of the audio effect. The value ranges between -1.0 and 1.0: -1.0: The audio effect shows on the left. 0: The audio effect shows ahead. 1.0: The audio effect shows on the right.
gain	The volume of the audio effect. The value range is [0, 100]. The default value is 100 (original volume). The smaller the value, the lower the volume.
publish	Whether to publish the audio effect to the remote users: `true`: Publish the audio effect to the remote users. Both the local user and remote users can hear the audio effect. `false`: (Default) Do not publish the audio effect to the remote users. Only the local user can hear the audio effect.

Returns

0: Success.
< 0: Failure.

◆ getVolumeOfEffect()

virtual int agora::rtc::IRtcEngine::getVolumeOfEffect ( int soundId )

pure virtual

Gets the volume of a specified audio effect file.

Parameters

soundId The ID of the audio effect file.

Returns

≥ 0: Returns the volume of the specified audio effect, if the method call is successful. The value ranges between 0 and 100. 100 represents the original volume.
< 0: Failure.

◆ setVolumeOfEffect()

virtual int agora::rtc::IRtcEngine::setVolumeOfEffect	(	int	soundId,
		int	volume
	)

pure virtual

Gets the volume of a specified audio effect file.

Call timing: Call this method after playEffect.

Parameters

soundId	The ID of the audio effect. The unique ID of each audio effect file.
volume	The playback volume. The value range is [0, 100]. The default value is 100, which represents the original volume.

Returns

0: Success.
< 0: Failure.

◆ pauseEffect()

virtual int agora::rtc::IRtcEngine::pauseEffect ( int soundId )

pure virtual

Pauses a specified audio effect file.

Parameters

soundId The audio effect ID. The ID of each audio effect file is unique.

Returns

0: Success.
< 0: Failure.

◆ pauseAllEffects()

virtual int agora::rtc::IRtcEngine::pauseAllEffects ( )

pure virtual

Pauses all audio effects.

Returns

0: Success.
< 0: Failure.

◆ resumeEffect()

virtual int agora::rtc::IRtcEngine::resumeEffect ( int soundId )

pure virtual

Resumes playing a specified audio effect.

Parameters

soundId The audio effect ID. The ID of each audio effect file is unique.

Returns

0: Success.
< 0: Failure.

◆ resumeAllEffects()

virtual int agora::rtc::IRtcEngine::resumeAllEffects ( )

pure virtual

Resumes playing all audio effect files.

After you call pauseAllEffects to pause the playback, you can call this method to resume the playback. Call timing: Call this method after pauseAllEffects.

Returns

0: Success.
< 0: Failure.

◆ stopEffect()

virtual int agora::rtc::IRtcEngine::stopEffect ( int soundId )

pure virtual

Stops playing a specified audio effect.

When you no longer need to play the audio effect, you can call this method to stop the playback. If you only need to pause the playback, call pauseEffect. Call timing: Call this method after playEffect.

Parameters

soundId The ID of the audio effect. Each audio effect has a unique ID.

Returns

0: Success.
< 0: Failure.

◆ stopAllEffects()

virtual int agora::rtc::IRtcEngine::stopAllEffects ( )

pure virtual

Stops playing all audio effects.

When you no longer need to play the audio effect, you can call this method to stop the playback. If you only need to pause the playback, call pauseAllEffects. Call timing: Call this method after playEffect.

Returns

0: Success.
< 0: Failure.

◆ unloadEffect()

virtual int agora::rtc::IRtcEngine::unloadEffect ( int soundId )

pure virtual

Releases a specified preloaded audio effect from the memory.

After loading the audio effect file into memory using preloadEffect, if you need to release the audio effect file, call this method. Call timing: You can call this method either before or after joining a channel.

Parameters

soundId The ID of the audio effect. Each audio effect has a unique ID.

Returns

0: Success.
< 0: Failure.

◆ unloadAllEffects()

virtual int agora::rtc::IRtcEngine::unloadAllEffects ( )

pure virtual

Releases a specified preloaded audio effect from the memory.

Returns

0: Success.
< 0: Failure.

◆ getEffectDuration()

virtual int agora::rtc::IRtcEngine::getEffectDuration ( const char * filePath )

pure virtual

Retrieves the duration of the audio effect file.

Note: Call this method after joining a channel.

Parameters

filePath

File path:

Android: The file path, which needs to be accurate to the file name and suffix. Agora supports URL addresses, absolute paths, or file paths that start with /assets/. You might encounter permission issues if you use an absolute path to access a local file, so Agora recommends using a URI address instead. For example: content://com.android.providers.media.documents/document/audio%3A14441
Windows: The absolute path or URL address (including the suffixes of the filename) of the audio effect file. For example: C:\music\audio.mp4.
iOS or macOS: The absolute path or URL address (including the suffixes of the filename) of the audio effect file. For example: /var/mobile/Containers/Data/audio.mp4.

Returns

The total duration (ms) of the specified audio effect file, if the method call succeeds.
< 0: Failure.

◆ setEffectPosition()

virtual int agora::rtc::IRtcEngine::setEffectPosition	(	int	soundId,
		int	pos
	)

pure virtual

Sets the playback position of an audio effect file.

After a successful setting, the local audio effect file starts playing at the specified position.

Note: Call this method after playEffect.

Parameters

soundId	The audio effect ID. The ID of each audio effect file is unique.
pos	The playback position (ms) of the audio effect file.

Returns

0: Success.
< 0: Failure.

◆ getEffectCurrentPosition()

virtual int agora::rtc::IRtcEngine::getEffectCurrentPosition ( int soundId )

pure virtual

Retrieves the playback position of the audio effect file.

Note: Call this method after playEffect.

Parameters

soundId The audio effect ID. The ID of each audio effect file is unique.

Returns

The playback position (ms) of the specified audio effect file, if the method call succeeds.
< 0: Failure.

◆ enableSoundPositionIndication()

virtual int agora::rtc::IRtcEngine::enableSoundPositionIndication ( bool enabled )

pure virtual

Enables or disables stereo panning for remote users.

Ensure that you call this method before joining a channel to enable stereo panning for remote users so that the local user can track the position of a remote user by calling setRemoteVoicePosition.

Parameters

enabled

Whether to enable stereo panning for remote users:

true: Enable stereo panning.
false: Disable stereo panning.

Returns

0: Success.
< 0: Failure.

◆ setRemoteVoicePosition()

virtual int agora::rtc::IRtcEngine::setRemoteVoicePosition	(	uid_t	uid,
		double	pan,
		double	gain
	)

pure virtual

Sets the 2D position (the position on the horizontal plane) of the remote user's voice.

This method sets the 2D position and volume of a remote user, so that the local user can easily hear and identify the remote user's position. When the local user calls this method to set the voice position of a remote user, the voice difference between the left and right channels allows the local user to track the real-time position of the remote user, creating a sense of space. This method applies to massive multiplayer online games, such as Battle Royale games.

Note

For this method to work, enable stereo panning for remote users by calling the enableSoundPositionIndication method before joining a channel.
For the best voice positioning, Agora recommends using a wired headset.
Call this method after joining a channel.

Parameters

uid	The user ID of the remote user.
pan	The voice position of the remote user. The value ranges from -1.0 to 1.0: 0.0: (Default) The remote voice comes from the front. -1.0: The remote voice comes from the left. 1.0: The remote voice comes from the right.
gain	The volume of the remote user. The value ranges from 0.0 to 100.0. The default value is 100.0 (the original volume of the remote user). The smaller the value, the lower the volume.

Returns

0: Success.
< 0: Failure.

◆ enableSpatialAudio()

virtual int agora::rtc::IRtcEngine::enableSpatialAudio ( bool enabled )

pure virtual

Enables or disables the spatial audio effect.

After enabling the spatial audio effect, you can call setRemoteUserSpatialAudioParams to set the spatial audio effect parameters of the remote user.

Note

You can call this method either before or after joining a channel.
This method relies on the spatial audio dynamic library libagora_spatial_audio_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

enabled

Whether to enable the spatial audio effect:

true: Enable the spatial audio effect.
false: Disable the spatial audio effect.

Returns

0: Success.
< 0: Failure.

◆ setRemoteUserSpatialAudioParams()

virtual int agora::rtc::IRtcEngine::setRemoteUserSpatialAudioParams	(	uid_t	uid,
		const agora::SpatialAudioParams &	params
	)

pure virtual

Sets the spatial audio effect parameters of the remote user.

Call this method after enableSpatialAudio. After successfully setting the spatial audio effect parameters of the remote user, the local user can hear the remote user with a sense of space.

Parameters

uid	The user ID. This parameter must be the same as the user ID passed in when the user joined the channel.
params	The spatial audio parameters. See `SpatialAudioParams`.

Returns

0: Success.
< 0: Failure.

◆ setVoiceBeautifierPreset()

virtual int agora::rtc::IRtcEngine::setVoiceBeautifierPreset ( VOICE_BEAUTIFIER_PRESET preset )

pure virtual

Sets a preset voice beautifier effect.

Call this method to set a preset voice beautifier effect for the local user who sends an audio stream. After setting a voice beautifier effect, all users in the channel can hear the effect. You can set different voice beautifier effects for different scenarios. Call timing: This method can be called either before or after joining the channel. To achieve better vocal effects, it is recommended that you call the following APIs before calling this method:

Call setAudioScenario to set the audio scenario to high-quality audio scenario, namely AUDIO_SCENARIO_GAME_STREAMING (3).
Call setAudioProfile(AUDIO_PROFILE_TYPE profile) to set the profile parameter to AUDIO_PROFILE_MUSIC_HIGH_QUALITY (4) or AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO (5).

Note

Do not set the profile parameter in setAudioProfile(AUDIO_PROFILE_TYPE profile) to AUDIO_PROFILE_SPEECH_STANDARD (1) or AUDIO_PROFILE_IOT (6), or the method does not take effect.
This method has the best effect on human voice processing, and Agora does not recommend calling this method to process audio data containing music.
After calling setVoiceBeautifierPreset, Agora does not recommend calling the following methods, otherwise the effect set by setVoiceBeautifierPreset will be overwritten:
- setAudioEffectPreset
- setAudioEffectParameters
- setLocalVoicePitch
- setLocalVoiceEqualization
- setLocalVoiceReverb
- setVoiceBeautifierParameters
- setVoiceConversionPreset
This method relies on the voice beautifier dynamic library libagora_audio_beauty_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

preset The preset voice beautifier effect options: VOICE_BEAUTIFIER_PRESET.

Returns

0: Success.
< 0: Failure.

◆ setAudioEffectPreset()

virtual int agora::rtc::IRtcEngine::setAudioEffectPreset ( AUDIO_EFFECT_PRESET preset )

pure virtual

Sets an SDK preset audio effect.

Call this method to set an SDK preset audio effect for the local user who sends an audio stream. This audio effect does not change the gender characteristics of the original voice. After setting an audio effect, all users in the channel can hear the effect. Call timing: This method can be called either before or after joining the channel. To achieve better vocal effects, it is recommended that you call the following APIs before calling this method:

Call setAudioScenario to set the audio scenario to high-quality audio scenario, namely AUDIO_SCENARIO_GAME_STREAMING (3).
Call setAudioProfile(AUDIO_PROFILE_TYPE profile) to set the profile parameter to AUDIO_PROFILE_MUSIC_HIGH_QUALITY (4) or AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO (5).

Note

Do not set the profile parameter in setAudioProfile(AUDIO_PROFILE_TYPE profile) to AUDIO_PROFILE_SPEECH_STANDARD (1) or AUDIO_PROFILE_IOT (6), or the method does not take effect.
If you call setAudioEffectPreset and set enumerators except for ROOM_ACOUSTICS_3D_VOICE or PITCH_CORRECTION, do not call setAudioEffectParameters; otherwise, setAudioEffectPreset is overridden.
After calling setAudioEffectPreset, Agora does not recommend you to call the following methods, otherwise the effect set by setAudioEffectPreset will be overwritten:
- setVoiceBeautifierPreset
- setLocalVoicePitch
- setLocalVoiceEqualization
- setLocalVoiceReverb
- setVoiceBeautifierParameters
- setVoiceConversionPreset
This method relies on the voice beautifier dynamic library libagora_audio_beauty_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

preset The options for SDK preset audio effects. See AUDIO_EFFECT_PRESET.

Returns

0: Success.
< 0: Failure.

◆ setVoiceConversionPreset()

virtual int agora::rtc::IRtcEngine::setVoiceConversionPreset ( VOICE_CONVERSION_PRESET preset )

pure virtual

Sets a preset voice beautifier effect.

Call this method to set a preset voice changing effect for the local user who publishes an audio stream in a channel. After setting the voice changing effect, all users in the channel can hear the effect. You can set different voice changing effects for the user depending on different scenarios. Call timing: This method can be called either before or after joining the channel. To achieve better vocal effects, it is recommended that you call the following APIs before calling this method:

Call setAudioScenario to set the audio scenario to high-quality audio scenario, namely AUDIO_SCENARIO_GAME_STREAMING (3).
Call setAudioProfile(AUDIO_PROFILE_TYPE profile) to set the profile parameter to AUDIO_PROFILE_MUSIC_HIGH_QUALITY (4) or AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO (5).

Note

Do not set the profile parameter in setAudioProfile(AUDIO_PROFILE_TYPE profile) to AUDIO_PROFILE_SPEECH_STANDARD (1) or AUDIO_PROFILE_IOT (6), or the method does not take effect.
This method has the best effect on human voice processing, and Agora does not recommend calling this method to process audio data containing music.
After calling setVoiceConversionPreset, Agora does not recommend you to call the following methods, otherwise the effect set by setVoiceConversionPreset will be overwritten:
- setAudioEffectPreset
- setAudioEffectParameters
- setVoiceBeautifierPreset
- setVoiceBeautifierParameters
- setLocalVoicePitch
- setLocalVoiceFormant
- setLocalVoiceEqualization
- setLocalVoiceReverb
This method relies on the voice beautifier dynamic library libagora_audio_beauty_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

preset The options for the preset voice beautifier effects: VOICE_CONVERSION_PRESET.

Returns

0: Success.
< 0: Failure.

◆ setAudioEffectParameters()

virtual int agora::rtc::IRtcEngine::setAudioEffectParameters	(	AUDIO_EFFECT_PRESET	preset,
		int	param1,
		int	param2
	)

pure virtual

Sets parameters for SDK preset audio effects.

Call this method to set the following parameters for the local user who sends an audio stream:

3D voice effect: Sets the cycle period of the 3D voice effect.
Pitch correction effect: Sets the basic mode and tonic pitch of the pitch correction effect. Different songs have different modes and tonic pitches. Agora recommends bounding this method with interface elements to enable users to adjust the pitch correction interactively. After setting the audio parameters, all users in the channel can hear the effect. To achieve better vocal effects, it is recommended that you call the following APIs before calling this method:
Call setAudioScenario to set the audio scenario to high-quality audio scenario, namely AUDIO_SCENARIO_GAME_STREAMING (3).
Call setAudioProfile(AUDIO_PROFILE_TYPE profile) to set the profile parameter to AUDIO_PROFILE_MUSIC_HIGH_QUALITY (4) or AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO (5).

Note

You can call this method either before or after joining a channel.
Do not set the profile parameter in setAudioProfile(AUDIO_PROFILE_TYPE profile) to AUDIO_PROFILE_SPEECH_STANDARD (1) or AUDIO_PROFILE_IOT (6), or the method does not take effect.
This method has the best effect on human voice processing, and Agora does not recommend calling this method to process audio data containing music.
After calling setAudioEffectParameters, Agora does not recommend you to call the following methods, otherwise the effect set by setAudioEffectParameters will be overwritten:
- setAudioEffectPreset
- setVoiceBeautifierPreset
- setLocalVoicePitch
- setLocalVoiceEqualization
- setLocalVoiceReverb
- setVoiceBeautifierParameters
- setVoiceConversionPreset
This method relies on the voice beautifier dynamic library libagora_audio_beauty_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

preset	The options for SDK preset audio effects: `ROOM_ACOUSTICS_3D_VOICE`, 3D voice effect: You need to set the `profile` parameter in `setAudioProfile(AUDIO_PROFILE_TYPE profile)` to `AUDIO_PROFILE_MUSIC_STANDARD_STEREO` (3) or `AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO` (5) before setting this enumerator; otherwise, the enumerator setting does not take effect. If the 3D voice effect is enabled, users need to use stereo audio playback devices to hear the anticipated voice effect. `PITCH_CORRECTION`, Pitch correction effect:
param1	- If you set `preset` to `ROOM_ACOUSTICS_3D_VOICE`, `param1` sets the cycle period of the 3D voice effect. The value range is [1,60] and the unit is seconds. The default value is 10, indicating that the voice moves around you every 10 seconds. If you set `preset` to `PITCH_CORRECTION`, `param1` indicates the basic mode of the pitch correction effect: `1`: (Default) Natural major scale. `2`: Natural minor scale. `3`: Japanese pentatonic scale.
param2	- If you set `preset` to `ROOM_ACOUSTICS_3D_VOICE` , you need to set `param2` to `0`. If you set `preset` to `PITCH_CORRECTION`, `param2` indicates the tonic pitch of the pitch correction effect: `1`: A `2`: A# `3`: B `4`: (Default) C `5`: C# `6`: D `7`: D# `8`: E `9`: F `10`: F# `11`: G `12`: G#

Returns

0: Success.
< 0: Failure.

◆ setVoiceBeautifierParameters()

virtual int agora::rtc::IRtcEngine::setVoiceBeautifierParameters	(	VOICE_BEAUTIFIER_PRESET	preset,
		int	param1,
		int	param2
	)

pure virtual

Sets parameters for the preset voice beautifier effects.

Call this method to set a gender characteristic and a reverberation effect for the singing beautifier effect. This method sets parameters for the local user who sends an audio stream. After setting the audio parameters, all users in the channel can hear the effect. To achieve better vocal effects, it is recommended that you call the following APIs before calling this method:

Call setAudioScenario to set the audio scenario to high-quality audio scenario, namely AUDIO_SCENARIO_GAME_STREAMING (3).
Call setAudioProfile(AUDIO_PROFILE_TYPE profile) to set the profile parameter to AUDIO_PROFILE_MUSIC_HIGH_QUALITY (4) or AUDIO_PROFILE_MUSIC_HIGH_QUALITY_STEREO (5).

Note

You can call this method either before or after joining a channel.
Do not set the profile parameter in setAudioProfile(AUDIO_PROFILE_TYPE profile) to AUDIO_PROFILE_SPEECH_STANDARD (1) or AUDIO_PROFILE_IOT (6), or the method does not take effect.
This method has the best effect on human voice processing, and Agora does not recommend calling this method to process audio data containing music.
After calling setVoiceBeautifierParameters, Agora does not recommend calling the following methods, otherwise the effect set by setVoiceBeautifierParameters will be overwritten:
- setAudioEffectPreset
- setAudioEffectParameters
- setVoiceBeautifierPreset
- setLocalVoicePitch
- setLocalVoiceEqualization
- setLocalVoiceReverb
- setVoiceConversionPreset
This method relies on the voice beautifier dynamic library libagora_audio_beauty_extension.dll. If the dynamic library is deleted, the function cannot be enabled normally.

Parameters

preset	The option for the preset audio effect: `SINGING_BEAUTIFIER`: The singing beautifier effect.
param1	The gender characteristics options for the singing voice: `1`: A male-sounding voice. `2`: A female-sounding voice.
param2	The reverberation effect options for the singing voice: `1`: The reverberation effect sounds like singing in a small room. `2`: The reverberation effect sounds like singing in a large room. `3`: The reverberation effect sounds like singing in a hall.

Returns

0: Success.
< 0: Failure.

◆ setVoiceConversionParameters()

virtual int agora::rtc::IRtcEngine::setVoiceConversionParameters	(	VOICE_CONVERSION_PRESET	preset,
		int	param1,
		int	param2
	)

pure virtual

Set parameters for SDK preset voice conversion.

Note

reserved interface

Parameters

preset	The options for SDK preset audio effects. See #VOICE_CONVERSION_PRESET.
param1	reserved.
param2	reserved.

Returns

0: Success.
< 0: Failure.

◆ setLocalVoicePitch()

virtual int agora::rtc::IRtcEngine::setLocalVoicePitch ( double pitch )

pure virtual

Changes the voice pitch of the local speaker.

Call timing: This method can be called either before or after joining the channel.

Parameters

pitch The local voice pitch. The value range is [0.5,2.0]. The lower the value, the lower the pitch. The default value is 1.0 (no change to the pitch).

Returns

0: Success.
< 0: Failure.

◆ setLocalVoiceFormant()

virtual int agora::rtc::IRtcEngine::setLocalVoiceFormant ( double formantRatio )

pure virtual

Sets the formant ratio to change the timbre of human voice.

Formant ratio affects the timbre of voice. The smaller the value, the deeper the sound will be, and the larger, the sharper. After you set the formant ratio, all users in the channel can hear the changed voice. If you want to change the timbre and pitch of voice at the same time, Agora recommends using this method together with setLocalVoicePitch. Applicable scenarios: You can call this method to set the formant ratio of local audio to change the timbre of human voice. Call timing: This method can be called either before or after joining the channel.

Parameters

formantRatio The formant ratio. The value range is [-1.0, 1.0]. The default value is 0.0, which means do not change the timbre of the voice.Note: Agora recommends setting this value within the range of [-0.4, 0.6]. Otherwise, the voice may be seriously distorted.

Returns

0: Success.
< 0: Failure.

◆ setLocalVoiceEqualization()

virtual int agora::rtc::IRtcEngine::setLocalVoiceEqualization	(	AUDIO_EQUALIZATION_BAND_FREQUENCY	bandFrequency,
		int	bandGain
	)

pure virtual

Sets the local voice equalization effect.

Call timing: This method can be called either before or after joining the channel.

Parameters

bandFrequency	The band frequency. The value ranges between 0 and 9; representing the respective 10-band center frequencies of the voice effects, including 31, 62, 125, 250, 500, 1k, 2k, 4k, 8k, and 16k Hz. See `AUDIO_EQUALIZATION_BAND_FREQUENCY`.
bandGain	The gain of each band in dB. The value ranges between -15 and 15. The default value is 0.

Returns

0: Success.
< 0: Failure.

◆ setLocalVoiceReverb()

virtual int agora::rtc::IRtcEngine::setLocalVoiceReverb	(	AUDIO_REVERB_TYPE	reverbKey,
		int	value
	)

pure virtual

Sets the local voice reverberation.

The SDK provides an easier-to-use method, setAudioEffectPreset, to directly implement preset reverb effects for such as pop, R&B, and KTV.

Note: You can call this method either before or after joining a channel.

Parameters

reverbKey	The reverberation key. Agora provides five reverberation keys, see `AUDIO_REVERB_TYPE`.
value	The value of the reverberation key.

Returns

0: Success.
< 0: Failure.

◆ setHeadphoneEQPreset()

virtual int agora::rtc::IRtcEngine::setHeadphoneEQPreset ( HEADPHONE_EQUALIZER_PRESET preset )

pure virtual

Sets the preset headphone equalization effect.

This method is mainly used in spatial audio effect scenarios. You can select the preset headphone equalizer to listen to the audio to achieve the expected audio experience.

Note: If the headphones you use already have a good equalization effect, you may not get a significant improvement when you call this method, and could even diminish the experience.

Parameters

preset The preset headphone equalization effect. See HEADPHONE_EQUALIZER_PRESET.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).

◆ setHeadphoneEQParameters()

virtual int agora::rtc::IRtcEngine::setHeadphoneEQParameters	(	int	lowGain,
		int	highGain
	)

pure virtual

Sets the low- and high-frequency parameters of the headphone equalizer.

In a spatial audio effect scenario, if the preset headphone equalization effect is not achieved after calling the setHeadphoneEQPreset method, you can further adjust the headphone equalization effect by calling this method.

Parameters

lowGain	The low-frequency parameters of the headphone equalizer. The value range is [-10,10]. The larger the value, the deeper the sound.
highGain	The high-frequency parameters of the headphone equalizer. The value range is [-10,10]. The larger the value, the sharper the sound.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).

◆ enableVoiceAITuner()

virtual int agora::rtc::IRtcEngine::enableVoiceAITuner	(	bool	enabled,
		VOICE_AI_TUNER_TYPE	type
	)

pure virtual

Enables or disables the voice AI tuner.

The voice AI tuner supports enhancing sound quality and adjusting tone style. Applicable scenarios: Social entertainment scenes including online KTV, online podcast and live streaming in showrooms, where high sound quality is required. Call timing: This method can be called either before or after joining the channel.

Parameters

enabled	Whether to enable the voice AI tuner: `true`: Enables the voice AI tuner. `false`: (Default) Disable the voice AI tuner.
type	Voice AI tuner sound types, see `VOICE_AI_TUNER_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ setLogFile()

virtual int agora::rtc::IRtcEngine::setLogFile ( const char * filePath )

pure virtual

Sets the log file.

Specifies an SDK output log file. The log file records all log data for the SDK’s operation. Call timing: This method needs to be called immediately after initialize, otherwise the output log may be incomplete.

Note: Ensure that the directory for the log file exists and is writable.

Parameters

filePath The complete path of the log files. These log files are encoded in UTF-8.

Returns

0: Success.
< 0: Failure.

◆ setLogFilter()

virtual int agora::rtc::IRtcEngine::setLogFilter ( unsigned int filter )

pure virtual

Sets the log output level of the SDK.

This method sets the output log level of the SDK. You can use one or a combination of the log filter levels. The log level follows the sequence of LOG_FILTER_OFF, LOG_FILTER_CRITICAL, LOG_FILTER_ERROR, LOG_FILTER_WARN, LOG_FILTER_INFO, and LOG_FILTER_DEBUG. Choose a level to see the logs preceding that level. If, for example, you set the log level to LOG_FILTER_WARN, you see the logs within levels LOG_FILTER_CRITICAL, LOG_FILTER_ERROR and LOG_FILTER_WARN.

Parameters

filter The output log level of the SDK. See LOG_FILTER_TYPE.

Returns

0: Success.
< 0: Failure.

◆ setLogLevel()

virtual int agora::rtc::IRtcEngine::setLogLevel ( commons::LOG_LEVEL level )

pure virtual

Sets the output log level of the SDK.

Choose a level to see the logs preceding that level.

Parameters

level The log level. See LOG_LEVEL.

Returns

0: Success.
< 0: Failure.

◆ setLogFileSize()

virtual int agora::rtc::IRtcEngine::setLogFileSize ( unsigned int fileSizeInKBytes )

pure virtual

Sets the log file size.

By default, the SDK generates five SDK log files and five API call log files with the following rules:

The SDK log files are: agorasdk.log, agorasdk.1.log, agorasdk.2.log, agorasdk.3.log, and agorasdk.4.log.
The API call log files are: agoraapi.log, agoraapi.1.log, agoraapi.2.log, agoraapi.3.log, and agoraapi.4.log.
The default size of each SDK log file and API log file is 2,048 KB. These log files are encoded in UTF-8.
The SDK writes the latest logs in agorasdk.log or agoraapi.log.
When agorasdk.log is full, the SDK processes the log files in the following order:1. Delete the agorasdk.4.log file (if any).

Rename agorasdk.3.log to agorasdk.4.log.
Rename agorasdk.2.log to agorasdk.3.log.
Rename agorasdk.1.log to agorasdk.2.log.
Create a new agorasdk.log file.

The overwrite rules for the agoraapi.log file are the same as for agorasdk.log.

Note: This method is used to set the size of the agorasdk.log file only and does not effect the agoraapi.log file.

Parameters

fileSizeInKBytes The size (KB) of an agorasdk.log file. The value range is [128,20480]. The default value is 2,048 KB. If you set fileSizeInKByte smaller than 128 KB, the SDK automatically adjusts it to 128 KB; if you set fileSizeInKByte greater than 20,480 KB, the SDK automatically adjusts it to 20,480 KB.

Returns

0: Success.
< 0: Failure.

◆ uploadLogFile()

virtual int agora::rtc::IRtcEngine::uploadLogFile ( agora::util::AString & requestId )

pure virtual

Upload current log file immediately to server. only use this when an error occurs block before log file upload success or timeout.

Returns

0: Success.
< 0: Failure.

◆ writeLog()

virtual int agora::rtc::IRtcEngine::writeLog	(	commons::LOG_LEVEL	level,
		const char *	fmt,
			...
	)

pure virtual

Write the log to SDK . @technical preview

You can Write the log to SDK log files of the specified level.

Parameters

level

The log level:

LOG_LEVEL_NONE (0x0000): Do not output any log file.
LOG_LEVEL_INFO (0x0001): (Recommended) Output log files of the INFO level.
LOG_LEVEL_WARN (0x0002): Output log files of the WARN level.
LOG_LEVEL_ERROR (0x0004): Output log files of the ERROR level.
LOG_LEVEL_FATAL (0x0008): Output log files of the FATAL level.

Returns

0: Success.
< 0: Failure.

◆ setLocalRenderMode() [1/2]

virtual int agora::rtc::IRtcEngine::setLocalRenderMode	(	media::base::RENDER_MODE_TYPE	renderMode,
		VIDEO_MIRROR_MODE_TYPE	mirrorMode
	)

pure virtual

Updates the display mode of the local video view.

After initializing the local video view, you can call this method to update its rendering and mirror modes. It affects only the video view that the local user sees and does not impact the publishing of the local video. Call timing: - Ensure that you have called the setupLocalVideo method to initialize the local video view before calling this method.

During a call, you can call this method as many times as necessary to update the display mode of the local video view.

Note: This method only takes effect on the primary camera (PRIMARY_CAMERA_SOURCE). In scenarios involving custom video capture or the use of alternative video sources, you need to use setupLocalVideo instead of this method.

Parameters

renderMode	The local video display mode. See `RENDER_MODE_TYPE`.
mirrorMode	The mirror mode of the local video view. See `VIDEO_MIRROR_MODE_TYPE`. Attention: If you use a front camera, the SDK enables the mirror mode by default; if you use a rear camera, the SDK disables the mirror mode by default.

Returns

0: Success.
< 0: Failure.

◆ setRemoteRenderMode()

virtual int agora::rtc::IRtcEngine::setRemoteRenderMode	(	uid_t	uid,
		media::base::RENDER_MODE_TYPE	renderMode,
		VIDEO_MIRROR_MODE_TYPE	mirrorMode
	)

pure virtual

Updates the display mode of the video view of a remote user.

After initializing the video view of a remote user, you can call this method to update its rendering and mirror modes. This method affects only the video view that the local user sees.

Note

Call this method after initializing the remote view by calling the setupRemoteVideo method.
During a call, you can call this method as many times as necessary to update the display mode of the video view of a remote user.

Parameters

uid	The user ID of the remote user.
renderMode	The rendering mode of the remote user view. For details, see `RENDER_MODE_TYPE`.
mirrorMode	The mirror mode of the remote user view. See `VIDEO_MIRROR_MODE_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ setLocalRenderTargetFps()

virtual int agora::rtc::IRtcEngine::setLocalRenderTargetFps	(	VIDEO_SOURCE_TYPE	sourceType,
		int	targetFps
	)

pure virtual

Sets the maximum frame rate for rendering local video.

Applicable scenarios: In scenarios where the requirements for video rendering frame rate are not high (such as screen sharing or online education), you can call this method to set the maximum frame rate for local video rendering. The SDK will attempt to keep the actual frame rate of local rendering close to this value, which helps to reduce CPU consumption and improving system performance. Call timing: You can call this method either before or after joining a channel.

Parameters

sourceType	The type of the video source. See `VIDEO_SOURCE_TYPE`.
targetFps	The capture frame rate (fps) of the local video. Sopported values are: 1, 7, 10, 15, 24, 30, 60.CAUTION: Set this parameter to a value lower than the actual video frame rate; otherwise, the settings do not take effect.

Returns

0: Success.
< 0: Failure.

◆ setRemoteRenderTargetFps()

virtual int agora::rtc::IRtcEngine::setRemoteRenderTargetFps ( int targetFps )

pure virtual

Sets the maximum frame rate for rendering remote video.

Applicable scenarios: In scenarios where the video rendering frame rate is not critical (e.g., screen sharing, online education) or when the remote users are using mid-to-low-end devices, you can call this method to set the maximum frame rate for video rendering on the remote client. The SDK will attempt to render the actual frame rate as close as possible to this value, which helps to reduce CPU consumption and improve system performance. Call timing: You can call this method either before or after joining a channel.

Parameters

targetFps The capture frame rate (fps) of the local video. Sopported values are: 1, 7, 10, 15, 24, 30, 60.CAUTION: Set this parameter to a value lower than the actual video frame rate; otherwise, the settings do not take effect.

Returns

0: Success.
< 0: Failure.

◆ setLocalRenderMode() [2/2]

virtual int agora::rtc::IRtcEngine::setLocalRenderMode ( media::base::RENDER_MODE_TYPE renderMode )

pure virtual

Updates the display mode of the local video view.

After initializing the local video view, you can call this method to update its rendering mode. It affects only the video view that the local user sees, not the published local video stream.

Note

Ensure that you have called setupLocalVideo to initialize the local video view before this method.
During a call, you can call this method as many times as necessary to update the local video view.

Parameters

renderMode Sets the local display mode. See #RENDER_MODE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ setLocalVideoMirrorMode()

virtual int agora::rtc::IRtcEngine::setLocalVideoMirrorMode ( VIDEO_MIRROR_MODE_TYPE mirrorMode )

pure virtual

Sets the local video mirror mode.

Parameters

mirrorMode The local video mirror mode. See VIDEO_MIRROR_MODE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ enableDualStreamMode() [1/2]

virtual int agora::rtc::IRtcEngine::enableDualStreamMode ( bool enabled )

pure virtual

Enables or disables dual-stream mode on the sender side.

Dual streams are a pairing of a high-quality video stream and a low-quality video stream:

High-quality video stream: High bitrate, high resolution.
Low-quality video stream: Low bitrate, low resolution. After you enable dual-stream mode, you can call setRemoteVideoStreamType to choose to receive either the high-quality video stream or the low-quality video stream on the subscriber side.

Note

This method is applicable to all types of streams from the sender, including but not limited to video streams collected from cameras, screen sharing streams, and custom-collected video streams.
If you need to enable dual video streams in a multi-channel scenario, you can call the enableDualStreamModeEx method.
You can call this method either before or after joining a channel.

Parameters

enabled

Whether to enable dual-stream mode:

true: Enable dual-stream mode.
false: (Default) Disable dual-stream mode.

Returns

0: Success.
< 0: Failure.

◆ enableDualStreamMode() [2/2]

virtual int agora::rtc::IRtcEngine::enableDualStreamMode	(	bool	enabled,
		const SimulcastStreamConfig &	streamConfig
	)

pure virtual

Sets the dual-stream mode on the sender side and the low-quality video stream.

You can call this method to enable or disable the dual-stream mode on the publisher side. Dual streams are a pairing of a high-quality video stream and a low-quality video stream:

High-quality video stream: High bitrate, high resolution.
Low-quality video stream: Low bitrate, low resolution. After you enable dual-stream mode, you can call setRemoteVideoStreamType to choose to receive either the high-quality video stream or the low-quality video stream on the subscriber side.

Note

This method is applicable to all types of streams from the sender, including but not limited to video streams collected from cameras, screen sharing streams, and custom-collected video streams.
If you need to enable dual video streams in a multi-channel scenario, you can call the enableDualStreamModeEx method.
You can call this method either before or after joining a channel.

Parameters

enabled	Whether to enable dual-stream mode: `true`: Enable dual-stream mode. `false`: (Default) Disable dual-stream mode.
streamConfig	The configuration of the low-quality video stream. See `SimulcastStreamConfig`.Note: When setting `mode` to `DISABLE_SIMULCAST_STREAM`, setting `streamConfig` will not take effect.

Returns

0: Success.
< 0: Failure.

◆ setDualStreamMode() [1/2]

virtual int agora::rtc::IRtcEngine::setDualStreamMode ( SIMULCAST_STREAM_MODE mode )

pure virtual

Sets the dual-stream mode on the sender side.

The SDK defaults to enabling low-quality video stream adaptive mode ( AUTO_SIMULCAST_STREAM ) on the sender side, which means the sender does not actively send low-quality video stream. The receiving end with the role of the host can initiate a low-quality video stream request by calling setRemoteVideoStreamType, and upon receiving the request, the sending end automatically starts sending low-quality stream.

If you want to modify this behavior, you can call this method and set mode to DISABLE_SIMULCAST_STREAM (never send low-quality video streams) or ENABLE_SIMULCAST_STREAM (always send low-quality video streams).
If you want to restore the default behavior after making changes, you can call this method again with mode set to AUTO_SIMULCAST_STREAM.

Note

The difference and connection between this method and enableDualStreamMode(bool enabled) is as follows:

When calling this method and setting mode to DISABLE_SIMULCAST_STREAM, it has the same effect as enableDualStreamMode(bool enabled) (false).
When calling this method and setting mode to ENABLE_SIMULCAST_STREAM, it has the same effect as enableDualStreamMode(bool enabled) (true).
Both methods can be called before and after joining a channel. If both methods are used, the settings in the method called later takes precedence.

Parameters

mode	The mode in which the video stream is sent. See `SIMULCAST_STREAM_MODE`.

Returns

0: Success.
< 0: Failure.

◆ setSimulcastConfig()

virtual int agora::rtc::IRtcEngine::setSimulcastConfig ( const SimulcastConfig & simulcastConfig )

pure virtual

Sets the simulcast video stream configuration.

Since: v4.6.0

You can call this method to set video streams with different resolutions for the same video source. The subscribers can call setRemoteVideoStreamType to select which stream layer to receive. The broadcaster can publish up to four layers of video streams: one main stream (highest resolution) and three additional streams of different quality levels.

Parameters

simulcastConfig This configuration includes seven layers, from STREAM_LAYER_1 to STREAM_LOW, with a maximum of three layers enabled simultaneously. See SimulcastConfig.

Returns

0: Success.
< 0: Failure.

◆ setDualStreamMode() [2/2]

virtual int agora::rtc::IRtcEngine::setDualStreamMode	(	SIMULCAST_STREAM_MODE	mode,
		const SimulcastStreamConfig &	streamConfig
	)

pure virtual

Sets dual-stream mode configuration on the sender side.

The SDK defaults to enabling low-quality video stream adaptive mode ( AUTO_SIMULCAST_STREAM ) on the sender side, which means the sender does not actively send low-quality video stream. The receiving end with the role of the host can initiate a low-quality video stream request by calling setRemoteVideoStreamType, and upon receiving the request, the sending end automatically starts sending low-quality stream.

If you want to modify this behavior, you can call this method and set mode to DISABLE_SIMULCAST_STREAM (never send low-quality video streams) or ENABLE_SIMULCAST_STREAM (always send low-quality video streams).
If you want to restore the default behavior after making changes, you can call this method again with mode set to AUTO_SIMULCAST_STREAM. The difference between this method and setDualStreamMode(SIMULCAST_STREAM_MODE mode) is that this method can also configure the low-quality video stream, and the SDK sends the stream according to the configuration in streamConfig.

Note

The difference and connection between this method and enableDualStreamMode(bool enabled, const SimulcastStreamConfig& streamConfig) is as follows:

When calling this method and setting mode to DISABLE_SIMULCAST_STREAM, it has the same effect as calling enableDualStreamMode(bool enabled, const SimulcastStreamConfig& streamConfig) and setting enabled to false.
When calling this method and setting mode to ENABLE_SIMULCAST_STREAM, it has the same effect as calling enableDualStreamMode(bool enabled, const SimulcastStreamConfig& streamConfig) and setting enabled to true.
Both methods can be called before and after joining a channel. If both methods are used, the settings in the method called later takes precedence.

Parameters

mode	The mode in which the video stream is sent. See `SIMULCAST_STREAM_MODE`.
streamConfig	The configuration of the low-quality video stream. See `SimulcastStreamConfig`.Note: When setting `mode` to `DISABLE_SIMULCAST_STREAM`, setting `streamConfig` will not take effect.

Returns

0: Success.
< 0: Failure.

◆ enableCustomAudioLocalPlayback()

virtual int agora::rtc::IRtcEngine::enableCustomAudioLocalPlayback	(	track_id_t	trackId,
		bool	enabled
	)

pure virtual

Sets whether to enable the local playback of external audio source.

After calling this method to enable the local playback of external audio source, if you need to stop local playback, you can call this method again and set enabled to false. You can call adjustCustomAudioPlayoutVolume to adjust the local playback volume of the custom audio track.

Note: Ensure you have called the createCustomAudioTrack method to create a custom audio track before calling this method.

Parameters

trackId	The audio track ID. Set this parameter to the custom audio track ID returned in `createCustomAudioTrack`.
enabled	Whether to play the external audio source: `true`: Play the external audio source. `false`: (Default) Do not play the external source.

Returns

0: Success.
< 0: Failure.

◆ setRecordingAudioFrameParameters()

virtual int agora::rtc::IRtcEngine::setRecordingAudioFrameParameters	(	int	sampleRate,
		int	channel,
		RAW_AUDIO_FRAME_OP_MODE_TYPE	mode,
		int	samplesPerCall
	)

pure virtual

Sets the format of the captured raw audio data.

The SDK calculates the sampling interval based on the samplesPerCall, sampleRate and channel parameters set in this method.Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s). The SDK triggers the onRecordAudioFrame callback according to the sampling interval. Call timing: Call this method before joining a channel.

Parameters

sampleRate	The sample rate returned in the callback, which can be set as 8000, 16000, 32000, 44100, or 48000 Hz.
channel	The number of audio channels. You can set the value as 1 or 2. 1: Mono. 2: Stereo.
mode	The use mode of the audio frame. See `RAW_AUDIO_FRAME_OP_MODE_TYPE`.
samplesPerCall	The number of data samples, such as 1024 for the Media Push.

Returns

0: Success.
< 0: Failure.

◆ setPlaybackAudioFrameParameters()

virtual int agora::rtc::IRtcEngine::setPlaybackAudioFrameParameters	(	int	sampleRate,
		int	channel,
		RAW_AUDIO_FRAME_OP_MODE_TYPE	mode,
		int	samplesPerCall
	)

pure virtual

Sets the format of the raw audio playback data.

The SDK calculates the sampling interval based on the samplesPerCall, sampleRate and channel parameters set in this method.Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s). The SDK triggers the onPlaybackAudioFrame callback according to the sampling interval. Call timing: Call this method before joining a channel.

Parameters

sampleRate	The sample rate returned in the callback, which can be set as 8000, 16000, 24000, 32000, 44100, or 48000 Hz.
channel	The number of audio channels. You can set the value as 1 or 2. 1: Mono. 2: Stereo.
mode	The use mode of the audio frame. See `RAW_AUDIO_FRAME_OP_MODE_TYPE`.
samplesPerCall	The number of data samples, such as 1024 for the Media Push.

Returns

0: Success.
< 0: Failure.

◆ setMixedAudioFrameParameters()

virtual int agora::rtc::IRtcEngine::setMixedAudioFrameParameters	(	int	sampleRate,
		int	channel,
		int	samplesPerCall
	)

pure virtual

Sets the format of the raw audio data after mixing for audio capture and playback.

The SDK calculates the sampling interval based on the samplesPerCall, sampleRate and channel parameters set in this method.Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s). The SDK triggers the onMixedAudioFrame callback according to the sampling interval. Call timing: Call this method before joining a channel.

Parameters

sampleRate	The sample rate returned in the callback, which can be set as 8000, 16000, 32000, 44100, or 48000 Hz.
channel	The number of audio channels. You can set the value as 1 or 2. 1: Mono. 2: Stereo.
samplesPerCall	The number of data samples, such as 1024 for the Media Push.

Returns

0: Success.
< 0: Failure.

◆ setEarMonitoringAudioFrameParameters()

virtual int agora::rtc::IRtcEngine::setEarMonitoringAudioFrameParameters	(	int	sampleRate,
		int	channel,
		RAW_AUDIO_FRAME_OP_MODE_TYPE	mode,
		int	samplesPerCall
	)

pure virtual

Sets the format of the in-ear monitoring raw audio data.

This method is used to set the in-ear monitoring audio data format reported by the onEarMonitoringAudioFrame callback.

Note

Before calling this method, you need to call enableInEarMonitoring, and set includeAudioFilters to EAR_MONITORING_FILTER_BUILT_IN_AUDIO_FILTERS or EAR_MONITORING_FILTER_NOISE_SUPPRESSION.
The SDK calculates the sampling interval based on the samplesPerCall, sampleRate and channel parameters set in this method.Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s). The SDK triggers the onEarMonitoringAudioFrame callback according to the sampling interval.

Parameters

sampleRate	The sample rate of the audio data reported in the `onEarMonitoringAudioFrame` callback, which can be set as 8,000, 16,000, 32,000, 44,100, or 48,000 Hz.
channel	The number of audio channels reported in the `onEarMonitoringAudioFrame` callback. 1: Mono. 2: Stereo.
mode	The use mode of the audio frame. See `RAW_AUDIO_FRAME_OP_MODE_TYPE`.
samplesPerCall	The number of data samples reported in the `onEarMonitoringAudioFrame` callback, such as 1,024 for the Media Push.

Returns

0: Success.
< 0: Failure.

◆ setPlaybackAudioFrameBeforeMixingParameters() [1/2]

virtual int agora::rtc::IRtcEngine::setPlaybackAudioFrameBeforeMixingParameters	(	int	sampleRate,
		int	channel
	)

pure virtual

Sets the format of the raw audio playback data before mixing.

The SDK triggers the onPlaybackAudioFrameBeforeMixing callback according to the sampling interval. Call timing: Call this method before joining a channel.

Parameters

sampleRate	The sample rate returned in the callback, which can be set as 8000, 16000, 32000, 44100, or 48000 Hz.
channel	The number of audio channels. You can set the value as 1 or 2. 1: Mono. 2: Stereo.

Returns

0: Success.
< 0: Failure.

◆ setPlaybackAudioFrameBeforeMixingParameters() [2/2]

virtual int agora::rtc::IRtcEngine::setPlaybackAudioFrameBeforeMixingParameters	(	int	sampleRate,
		int	channel,
		int	samplesPerCall
	)

pure virtual

Sets the format of audio data in the onPlaybackAudioFrameBeforeMixing callback.

Used to set the sample rate, number of channels, and number of samples per callback for the audio data returned in the onPlaybackAudioFrameBeforeMixing callback.

Parameters

sampleRate	Set the sample rate returned in the `onPlaybackAudioFrameBeforeMixing` callback. It can be set as the following values: 8000、16000、32000、44100 or 48000.
channel	Set the number of channels for the audio data returned in the `onPlaybackAudioFrameBeforeMixing` callback. It can be set to: 1: Mono. 2: Stereo.
samplesPerCall	Set the sample rate of the audio data returned in the `onPlaybackAudioFrameBeforeMixing` callback. In the RTMP streaming scenario, it is recommended to set it to 1024.

Returns

0: Success.
< 0: Failure.

◆ enableAudioSpectrumMonitor()

virtual int agora::rtc::IRtcEngine::enableAudioSpectrumMonitor ( int intervalInMS = 100 )

pure virtual

Turns on audio spectrum monitoring.

If you want to obtain the audio spectrum data of local or remote users, you can register the audio spectrum observer and enable audio spectrum monitoring.

Note: You can call this method either before or after joining a channel.

Parameters

intervalInMS The interval (in milliseconds) at which the SDK triggers the onLocalAudioSpectrum and onRemoteAudioSpectrum callbacks. The default value is 100. Do not set this parameter to a value less than 10, otherwise calling this method would fail.

Returns

0: Success.
< 0: Failure.
- -2: Invalid parameters.

◆ disableAudioSpectrumMonitor()

virtual int agora::rtc::IRtcEngine::disableAudioSpectrumMonitor ( )

pure virtual

Disables audio spectrum monitoring.

After calling enableAudioSpectrumMonitor, if you want to disable audio spectrum monitoring, you can call this method.

Note: You can call this method either before or after joining a channel.

Returns

0: Success.
< 0: Failure.

◆ registerAudioSpectrumObserver()

virtual int agora::rtc::IRtcEngine::registerAudioSpectrumObserver ( agora::media::IAudioSpectrumObserver * observer )

pure virtual

Registers an audio spectrum observer.

After successfully registering the audio spectrum observer and calling enableAudioSpectrumMonitor to enable the audio spectrum monitoring, the SDK reports the callback that you implement in the IAudioSpectrumObserver class according to the time interval you set.

Note: You can call this method either before or after joining a channel.

Parameters

observer The audio spectrum observer. See IAudioSpectrumObserver.

Returns

0: Success.
< 0: Failure.

◆ unregisterAudioSpectrumObserver()

virtual int agora::rtc::IRtcEngine::unregisterAudioSpectrumObserver ( agora::media::IAudioSpectrumObserver * observer )

pure virtual

Unregisters the audio spectrum observer.

After calling registerAudioSpectrumObserver, if you want to disable audio spectrum monitoring, you can call this method.

Note: You can call this method either before or after joining a channel.

Parameters

observer The audio spectrum observer. See IAudioSpectrumObserver.

Returns

0: Success.
< 0: Failure.

◆ adjustRecordingSignalVolume()

virtual int agora::rtc::IRtcEngine::adjustRecordingSignalVolume ( int volume )

pure virtual

Adjusts the capturing signal volume.

If you only need to mute the audio signal, Agora recommends that you use muteRecordingSignal instead. Call timing: This method can be called either before or after joining the channel.

Parameters

volume

The volume of the user. The value range is [0,400].

0: Mute.
100: (Default) The original volume.
400: Four times the original volume (amplifying the audio signals by four times).

Returns

0: Success.
< 0: Failure.

◆ muteRecordingSignal()

virtual int agora::rtc::IRtcEngine::muteRecordingSignal ( bool mute )

pure virtual

Whether to mute the recording signal.

If you have already called adjustRecordingSignalVolume to adjust the recording signal volume, when you call this method and set it to true, the SDK behaves as follows:1. Records the adjusted volume.

Mutes the recording signal. When you call this method again and set it to false, the recording signal volume will be restored to the volume recorded by the SDK before muting. Call timing: This method can be called either before or after joining the channel.

Parameters

mute	- `true`: Mute the recording signal. `false`: (Default) Do not mute the recording signal.

Returns

0: Success.
< 0: Failure.

◆ adjustPlaybackSignalVolume()

virtual int agora::rtc::IRtcEngine::adjustPlaybackSignalVolume ( int volume )

pure virtual

Adjusts the playback signal volume of all remote users.

This method is used to adjust the signal volume of all remote users mixed and played locally. If you need to adjust the signal volume of a specified remote user played locally, it is recommended that you call adjustUserPlaybackSignalVolume instead. Call timing: This method can be called either before or after joining the channel.

Parameters

volume

The volume of the user. The value range is [0,400].

0: Mute.
100: (Default) The original volume.
400: Four times the original volume (amplifying the audio signals by four times).

Returns

0: Success.
< 0: Failure.

◆ adjustUserPlaybackSignalVolume()

virtual int agora::rtc::IRtcEngine::adjustUserPlaybackSignalVolume	(	uid_t	uid,
		int	volume
	)

pure virtual

Adjusts the playback signal volume of a specified remote user.

You can call this method to adjust the playback volume of a specified remote user. To adjust the playback volume of different remote users, call the method as many times, once for each remote user. Call timing: Call this method after joining a channel.

Parameters

uid	The user ID of the remote user.
volume	The volume of the user. The value range is [0,400]. 0: Mute. 100: (Default) The original volume. 400: Four times the original volume (amplifying the audio signals by four times).

Returns

0: Success.
< 0: Failure.

◆ setRemoteSubscribeFallbackOption()

virtual int agora::rtc::IRtcEngine::setRemoteSubscribeFallbackOption ( STREAM_FALLBACK_OPTIONS option )

pure virtual

Sets the fallback option for the subscribed video stream based on the network conditions.

An unstable network affects the audio and video quality in a video call or interactive live video streaming. If option is set as STREAM_FALLBACK_OPTION_VIDEO_STREAM_LOW or STREAM_FALLBACK_OPTION_AUDIO_ONLY, the SDK automatically switches the video from a high-quality stream to a low-quality stream or disables the video when the downlink network conditions cannot support both audio and video to guarantee the quality of the audio. Meanwhile, the SDK continuously monitors network quality and resumes subscribing to audio and video streams when the network quality improves. When the subscribed video stream falls back to an audio-only stream, or recovers from an audio-only stream to an audio-video stream, the SDK triggers the onRemoteSubscribeFallbackToAudioOnly callback.

Parameters

option Fallback options for the subscribed stream. See STREAM_FALLBACK_OPTIONS.

Returns

0: Success.
< 0: Failure.

◆ setHighPriorityUserList()

virtual int agora::rtc::IRtcEngine::setHighPriorityUserList	(	uid_t *	uidList,
		int	uidNum,
		STREAM_FALLBACK_OPTIONS	option
	)

pure virtual

Sets the high priority user list and their fallback level in weak network condition.

Note

This method can be called before and after joining a channel.
If a subscriber is set to high priority, this stream only fallback to lower stream after all normal priority users fallback to their fallback level on weak network condition if needed.

Parameters

uidList	The high priority user list.
uidNum	The size of uidList.
option	The fallback level of high priority users.

Returns

int

0 : Success.
<0 : Failure.

◆ enableExtension() [1/2]

virtual int agora::rtc::IRtcEngine::enableExtension	(	const char *	provider,
		const char *	extension,
		const ExtensionInfo &	extensionInfo,
		bool	enable = `true`
	)

pure virtual

Enable/Disable an extension. By calling this function, you can dynamically enable/disable the extension without changing the pipeline. For example, enabling/disabling Extension_A means the data will be adapted/bypassed by Extension_A.

NOTE: For compatibility reasons, if you haven't call registerExtension, enableExtension will automatically register the specified extension. We suggest you call registerExtension explicitly.

Parameters

provider	The name of the extension provider, e.g. agora.io.
extension	The name of the extension, e.g. agora.beauty.
extensionInfo	The information for extension.
enable	Whether to enable the extension: true: (Default) Enable the extension. false: Disable the extension.

Returns

0: Success.
< 0: Failure.

◆ setExtensionProperty() [1/2]

virtual int agora::rtc::IRtcEngine::setExtensionProperty	(	const char *	provider,
		const char *	extension,
		const ExtensionInfo &	extensionInfo,
		const char *	key,
		const char *	value
	)

pure virtual

Sets the properties of an extension.

Parameters

provider	The name of the extension provider, e.g. agora.io.
extension	The name of the extension, e.g. agora.beauty.
extensionInfo	The information for extension.
key	The key of the extension.
value	The JSON formatted value of the extension key.

Returns

0: Success.
< 0: Failure.

◆ getExtensionProperty() [1/2]

virtual int agora::rtc::IRtcEngine::getExtensionProperty	(	const char *	provider,
		const char *	extension,
		const ExtensionInfo &	extensionInfo,
		const char *	key,
		char *	value,
		int	buf_len
	)

pure virtual

Gets the properties of an extension.

Parameters

provider	The name of the extension provider, e.g. agora.io.
extension	The name of the extension, e.g. agora.beauty.
extensionInfo	The information for extension.
key	The key of the extension.
value	The value of the extension key.
buf_len	Maximum length of the JSON string indicating the extension property.

Returns

0: Success.
< 0: Failure.

◆ enableLoopbackRecording()

virtual int agora::rtc::IRtcEngine::enableLoopbackRecording	(	bool	enabled,
		const char *	deviceName = `NULL`
	)

pure virtual

Enables loopback audio capturing.

If you enable loopback audio capturing, the output of the sound card is mixed into the audio stream sent to the other end.

Note

This method applies to the macOS and Windows only.
You can call this method either before or after joining a channel.
If you call the disableAudio method to disable the audio module, audio capturing will be disabled as well. If you need to enable audio capturing, call the enableAudio method to enable the audio module and then call the enableLoopbackRecording method.

Parameters

enabled	Sets whether to enable loopback audio capturing. `true`: Enable sound card capturing. You can find the name of the virtual sound card in your system'sAudio Devices > Output. `false`: Disable sound card capturing. The name of the virtual sound card will not be shown in your system's Audio Devices > Output.
deviceName	- macOS: The device name of the virtual sound card. The default value is set to NULL, which means using AgoraALD for loopback audio capturing. Windows: The device name of the sound card. The default is set to NULL, which means the SDK uses the sound card of your device for loopback audio capturing.

Returns

0: Success.
< 0: Failure.

◆ adjustLoopbackSignalVolume()

virtual int agora::rtc::IRtcEngine::adjustLoopbackSignalVolume ( int volume )

pure virtual

Adjusts the volume of the signal captured by the sound card.

After calling enableLoopbackRecording to enable loopback audio capturing, you can call this method to adjust the volume of the signal captured by the sound card.

Parameters

volume Audio mixing volume. The value ranges between 0 and 100. The default value is 100, which means the original volume.

Returns

0: Success.
< 0: Failure.

◆ getLoopbackRecordingVolume()

virtual int agora::rtc::IRtcEngine::getLoopbackRecordingVolume ( )

pure virtual

Retrieves the audio volume for recording loopback.

Note: Call this method when you are in a channel.

Returns

≥ 0: The audio volume for loopback, if this method call succeeds. The value range is [0,100].
< 0: Failure.

◆ enableInEarMonitoring()

virtual int agora::rtc::IRtcEngine::enableInEarMonitoring	(	bool	enabled,
		int	includeAudioFilters
	)

pure virtual

Enables in-ear monitoring.

This method enables or disables in-ear monitoring. Call timing: This method can be called either before or after joining the channel.

Note: Users must use earphones (wired or Bluetooth) to hear the in-ear monitoring effect.

Parameters

enabled	Enables or disables in-ear monitoring. `true`: Enables in-ear monitoring. `false`: (Default) Disables in-ear monitoring.
includeAudioFilters	The audio filter types of in-ear monitoring. See `EAR_MONITORING_FILTER_TYPE`.

Returns

0: Success.
< 0: Failure.
- - 8: Make sure the current audio routing is Bluetooth or headset.

◆ setInEarMonitoringVolume()

virtual int agora::rtc::IRtcEngine::setInEarMonitoringVolume ( int volume )

pure virtual

Sets the volume of the in-ear monitor.

Call timing: This method can be called either before or after joining the channel.

Parameters

volume

The volume of the user. The value range is [0,400].

0: Mute.
100: (Default) The original volume.
400: Four times the original volume (amplifying the audio signals by four times).

Returns

0: Success.
< 0: Failure.
- -2: Invalid parameter settings, such as in-ear monitoring volume exceeding the valid range (< 0 or > 400).

◆ setExtensionProviderProperty()

virtual int agora::rtc::IRtcEngine::setExtensionProviderProperty	(	const char *	provider,
		const char *	key,
		const char *	value
	)

pure virtual

Sets the properties of the extension provider.

You can call this method to set the attributes of the extension provider and initialize the relevant parameters according to the type of the provider. Call timing: Call this method before enableExtension and after registerExtension.

Note: If you want to set the properties of the extension provider for multiple extensions, you need to call this method multiple times.

Parameters

provider	The name of the extension provider.
key	The key of the extension.
value	The value of the extension key.

Returns

0: Success.
< 0: Failure.

◆ registerExtension()

virtual int agora::rtc::IRtcEngine::registerExtension	(	const char *	provider,
		const char *	extension,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::UNKNOWN_MEDIA_SOURCE`
	)

pure virtual

Registers an extension.

For extensions external to the SDK (such as those from Extensions Marketplace and SDK Extensions), you need to load them before calling this method. Extensions internal to the SDK (those included in the full SDK package) are automatically loaded and registered after the initialization of IRtcEngine. Call timing: - Agora recommends you call this method after the initialization of IRtcEngine and before joining a channel.

For video extensions (such as the image enhancement extension), you need to call this method after enabling the video module by calling enableVideo or enableLocalVideo.
Before calling this method, you need to call loadExtensionProvider to load the extension first.

Note

If you want to register multiple extensions, you need to call this method multiple times.
The data processing order of different extensions in the SDK is determined by the order in which the extensions are registered. That is, the extension that is registered first will process the data first.

Parameters

provider	The name of the extension provider.
extension	The name of the extension.
type	Source type of the extension. See `MEDIA_SOURCE_TYPE`.

Returns

0: Success.
< 0: Failure.
- -3: The extension library is not loaded. Agora recommends that you check the storage location or the name of the dynamic library.

◆ enableExtension() [2/2]

virtual int agora::rtc::IRtcEngine::enableExtension	(	const char *	provider,
		const char *	extension,
		bool	enable = `true`,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::UNKNOWN_MEDIA_SOURCE`
	)

pure virtual

Enables or disables extensions.

Call timing: Agora recommends that you call this method after joining a channel. Related callbacks: When this method is successfully called within the channel, it triggers onExtensionStartedWithContext or onExtensionStoppedWithContext.

Note

If you want to enable multiple extensions, you need to call this method multiple times.
After a successful call of this method, you cannot load other extensions.

Parameters

provider	The name of the extension provider.
extension	The name of the extension.
enable	Whether to enable the extension: `true`: Enable the extension. `false`: Disable the extension.
type	Source type of the extension. See `MEDIA_SOURCE_TYPE`.

Returns

0: Success.
< 0: Failure.
- -3: The extension library is not loaded. Agora recommends that you check the storage location or the name of the dynamic library.

◆ setExtensionProperty() [2/2]

virtual int agora::rtc::IRtcEngine::setExtensionProperty	(	const char *	provider,
		const char *	extension,
		const char *	key,
		const char *	value,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::UNKNOWN_MEDIA_SOURCE`
	)

pure virtual

Sets the properties of the extension.

After enabling the extension, you can call this method to set the properties of the extension. Call timing: Call this mehtod after calling enableExtension. Related callbacks: After calling this method, it may trigger the onExtensionEventWithContext callback, and the specific triggering logic is related to the extension itself.

Note: If you want to set properties for multiple extensions, you need to call this method multiple times.

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.
type	Source type of the extension. See `MEDIA_SOURCE_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ getExtensionProperty() [2/2]

virtual int agora::rtc::IRtcEngine::getExtensionProperty	(	const char *	provider,
		const char *	extension,
		const char *	key,
		char *	value,
		int	buf_len,
		agora::media::MEDIA_SOURCE_TYPE	type = `agora::media::UNKNOWN_MEDIA_SOURCE`
	)

pure virtual

Gets detailed information on the extensions.

Call timing: This method can be called either before or after joining the channel.

Parameters

provider	An output parameter. The name of the extension provider.
extension	An output parameter. The name of the extension.
key	An output parameter. The key of the extension.
value	An output parameter. The value of the extension key.
type	Source type of the extension. See `MEDIA_SOURCE_TYPE`.
buf_len	Maximum length of the JSON string indicating the extension property. The maximum value is 512 bytes.

Returns

0: Success.
< 0: Failure.

◆ setCameraCapturerConfiguration()

virtual int agora::rtc::IRtcEngine::setCameraCapturerConfiguration ( const CameraCapturerConfiguration & config )

pure virtual

Sets the camera capture configuration.

Call timing: Call this method before enabling local camera capture, such as before calling startPreview(VIDEO_SOURCE_TYPE sourceType) and joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options).

Note: To adjust the camera focal length configuration, It is recommended to call queryCameraFocalLengthCapability first to check the device's focal length capabilities, and then configure based on the query results. Due to limitations on some Android devices, even if you set the focal length type according to the results returned in queryCameraFocalLengthCapability, the settings may not take effect.

Parameters

config The camera capture configuration. See CameraCapturerConfiguration.Attention: In this method, you do not need to set the deviceId parameter.

Returns

0: Success.
< 0: Failure.

◆ createCustomVideoTrack()

virtual video_track_id_t agora::rtc::IRtcEngine::createCustomVideoTrack ( )

pure virtual

Creates a custom video track.

To publish a custom video source, see the following steps:1. Call this method to create a video track and get the video track ID.

Call joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join the channel. In ChannelMediaOptions, set customVideoTrackId to the video track ID that you want to publish, and set publishCustomVideoTrack to true.
Call pushVideoFrame and specify videoTrackId as the video track ID set in step 2. You can then publish the corresponding custom video source in the channel.

Returns

If the method call is successful, the video track ID is returned as the unique identifier of the video track.
If the method call fails, 0xffffffff is returned.

◆ createCustomEncodedVideoTrack()

virtual video_track_id_t agora::rtc::IRtcEngine::createCustomEncodedVideoTrack ( const SenderOptions & sender_option )

pure virtual

Get an custom encoded video track id created by internal,which could used to publish or preview

Returns

> 0: the useable video track id.
< 0: Failure.

◆ destroyCustomVideoTrack()

virtual int agora::rtc::IRtcEngine::destroyCustomVideoTrack ( video_track_id_t video_track_id )

pure virtual

Destroys the specified video track.

Parameters

video_track_id The video track ID returned by calling the createCustomVideoTrack method.

Returns

0: Success.
< 0: Failure.

◆ destroyCustomEncodedVideoTrack()

virtual int agora::rtc::IRtcEngine::destroyCustomEncodedVideoTrack ( video_track_id_t video_track_id )

pure virtual

destroy a created custom encoded video track id

Parameters

video_track_id The video track id which was created by createCustomEncodedVideoTrack

Returns

0: Success.
< 0: Failure.

◆ getCallId()

virtual int agora::rtc::IRtcEngine::getCallId ( agora::util::AString & callId )

pure virtual

Retrieves the call ID.

When a user joins a channel on a client, a callId is generated to identify the call from the client. You can call this method to get callId, and pass it in when calling methods such as rate and complain. Call timing: Call this method after joining a channel.

Parameters

callId Output parameter, the current call ID.

Returns

0: Success.
< 0: Failure.

◆ rate()

virtual int agora::rtc::IRtcEngine::rate	(	const char *	callId,
		int	rating,
		const char *	description
	)

pure virtual

Allows a user to rate a call after the call ends.

Note: Ensure that you call this method after leaving a channel.

Parameters

callId	The current call ID. You can get the call ID by calling `getCallId`.
rating	The value is between 1 (the lowest score) and 5 (the highest score).
description	(Optional) A description of the call. The string length should be less than 800 bytes.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.

◆ complain()

virtual int agora::rtc::IRtcEngine::complain	(	const char *	callId,
		const char *	description
	)

pure virtual

Allows a user to complain about the call quality after a call ends.

This method allows users to complain about the quality of the call. Call this method after the user leaves the channel.

Parameters

callId	The current call ID. You can get the call ID by calling `getCallId`.
description	(Optional) A description of the call. The string length should be less than 800 bytes.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -7: The method is called before IRtcEngine is initialized.

◆ startRtmpStreamWithoutTranscoding()

virtual int agora::rtc::IRtcEngine::startRtmpStreamWithoutTranscoding ( const char * url )

pure virtual

Starts pushing media streams to a CDN without transcoding.

Agora recommends that you use the server-side Media Push function. For details, see Use RESTful API. You can call this method to push an audio or video stream to the specified CDN address. This method can push media streams to only one CDN address at a time, so if you need to push streams to multiple addresses, call this method multiple times. After you call this method, the SDK triggers the onRtmpStreamingStateChanged callback on the local client to report the state of the streaming.

Note

Call this method after joining a channel.
Only hosts in the LIVE_BROADCASTING profile can call this method.
If you want to retry pushing streams after a failed push, make sure to call stopRtmpStream first, then call this method to retry pushing streams; otherwise, the SDK returns the same error code as the last failed push.

Parameters

url	The address of Media Push. The format is RTMP or RTMPS. The character length cannot exceed 1024 bytes. Special characters such as Chinese characters are not supported.

Returns

0: Success.
< 0: Failure.
- -2: The URL or configuration of transcoding is invalid; check your URL and transcoding configurations.
- -7: The SDK is not initialized before calling this method.
- -19: The Media Push URL is already in use; use another URL instead.

◆ startRtmpStreamWithTranscoding()

virtual int agora::rtc::IRtcEngine::startRtmpStreamWithTranscoding	(	const char *	url,
		const LiveTranscoding &	transcoding
	)

pure virtual

Starts Media Push and sets the transcoding configuration.

Agora recommends that you use the server-side Media Push function. For details, see Use RESTful API. You can call this method to push a live audio-and-video stream to the specified CDN address and set the transcoding configuration. This method can push media streams to only one CDN address at a time, so if you need to push streams to multiple addresses, call this method multiple times. Under one Agora project, the maximum number of concurrent tasks to push media streams is 200 by default. If you need a higher quota, contact technical support. After you call this method, the SDK triggers the onRtmpStreamingStateChanged callback on the local client to report the state of the streaming.

Note

Call this method after joining a channel.
Only hosts in the LIVE_BROADCASTING profile can call this method.
If you want to retry pushing streams after a failed push, make sure to call stopRtmpStream first, then call this method to retry pushing streams; otherwise, the SDK returns the same error code as the last failed push.

Parameters

url	The address of Media Push. The format is RTMP or RTMPS. The character length cannot exceed 1024 bytes. Special characters such as Chinese characters are not supported.
transcoding	The transcoding configuration for Media Push. See `LiveTranscoding`.

Returns

0: Success.
< 0: Failure.
- -2: The URL or configuration of transcoding is invalid; check your URL and transcoding configurations.
- -7: The SDK is not initialized before calling this method.
- -19: The Media Push URL is already in use; use another URL instead.

◆ updateRtmpTranscoding()

virtual int agora::rtc::IRtcEngine::updateRtmpTranscoding ( const LiveTranscoding & transcoding )

pure virtual

Updates the transcoding configuration.

Agora recommends that you use the server-side Media Push function. For details, see Use RESTful API. After you start pushing media streams to CDN with transcoding, you can dynamically update the transcoding configuration according to the scenario. The SDK triggers the onTranscodingUpdated callback after the transcoding configuration is updated.

Parameters

transcoding The transcoding configuration for Media Push. See LiveTranscoding.

Returns

0: Success.
< 0: Failure.

◆ startLocalVideoTranscoder()

virtual int agora::rtc::IRtcEngine::startLocalVideoTranscoder ( const LocalTranscoderConfiguration & config )

pure virtual

Starts the local video mixing.

After calling this method, you can merge multiple video streams into one video stream locally. For example, you can merge the video streams captured by the camera, screen sharing, media player, remote video, video files, images, etc. into one video stream, and then publish the mixed video stream to the channel. Applicable scenarios: You can enable the local video mixing function in scenarios such as remote conferences, live streaming, and online education, which allows users to view and manage multiple videos more conveniently, and supports portrait-in-picture effect and other functions. The following is a typical use case for implementing the portrait-in-picture effect:1. Call enableVirtualBackground, and set the custom background image to BACKGROUND_NONE, that is, separate the portrait and the background in the video captured by the camera.

Call startScreenCapture(VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration& config) to start capturing the screen sharing video stream.
Call this method and set the video source for capturing portraits as one of the video sources participating in the local video mixing, picture-in-picture of the portrait can be achived in the mixed video. Call timing: - If you need to mix the locally collected video streams, you need to call this method after startCameraCapture or startScreenCapture(VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration& config).

If you want to publish the mixed video stream to the channel, you need to set publishTranscodedVideoTrack in ChannelMediaOptions to true when calling joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) or updateChannelMediaOptions. Related callbacks: When you fail to call this method, the SDK triggers the onLocalVideoTranscoderError callback to report the reason.

Note

Local video mixing requires more CPU resources. Therefore, Agora recommends enabling this function on devices with higher performance.
If you need to mix locally captured video streams, the SDK supports the following capture combinations:
- On the Windows platform, it supports up to 4 video streams captured by cameras + 4 screen sharing streams.
- On the macOS platform, it supports up to 4 video streams captured by cameras + 1 screen sharing stream.
- On Android and iOS platforms, it supports video streams captured by up to 2 cameras (the device itself needs to support dual cameras or supports external cameras) + 1 screen sharing stream.
When configuring the local video mixing, it is necessary to ensure that the layer number of the video stream capturing the portrait is greater than the layer number of the screen sharing stream. Otherwise, the portrait will be covered by the screen sharing and will not be displayed in the final mixed video stream.

Parameters

config

Configuration of the local video mixing, see LocalTranscoderConfiguration.Attention:

The maximum resolution of each video stream participating in the local video mixing is 4096 ×

If this limit is exceeded, video mixing does not take effect.

The maximum resolution of the mixed video stream is 4096 × 2160.

Returns

0: Success.
< 0: Failure.

◆ updateLocalTranscoderConfiguration()

virtual int agora::rtc::IRtcEngine::updateLocalTranscoderConfiguration ( const LocalTranscoderConfiguration & config )

pure virtual

Updates the local video mixing configuration.

After calling startLocalVideoTranscoder, call this method if you want to update the local video mixing configuration.

Note: If you want to update the video source type used for local video mixing, such as adding a second camera or screen to capture video, you need to call this method after startCameraCapture or startScreenCapture(VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration& config).

Parameters

config Configuration of the local video mixing, see LocalTranscoderConfiguration.

Returns

0: Success.
< 0: Failure.

◆ stopRtmpStream()

virtual int agora::rtc::IRtcEngine::stopRtmpStream ( const char * url )

pure virtual

Stops pushing media streams to a CDN.

Agora recommends that you use the server-side Media Push function. For details, see Use RESTful API. You can call this method to stop the live stream on the specified CDN address. This method can stop pushing media streams to only one CDN address at a time, so if you need to stop pushing streams to multiple addresses, call this method multiple times. After you call this method, the SDK triggers the onRtmpStreamingStateChanged callback on the local client to report the state of the streaming.

Parameters

url	The address of Media Push. The format is RTMP or RTMPS. The character length cannot exceed 1024 bytes. Special characters such as Chinese characters are not supported.

Returns

0: Success.
< 0: Failure.

◆ stopLocalVideoTranscoder()

virtual int agora::rtc::IRtcEngine::stopLocalVideoTranscoder ( )

pure virtual

Stops the local video mixing.

After calling startLocalVideoTranscoder, call this method if you want to stop the local video mixing.

Returns

0: Success.
< 0: Failure.

◆ startLocalAudioMixer()

virtual int agora::rtc::IRtcEngine::startLocalAudioMixer ( const LocalAudioMixerConfiguration & config )

pure virtual

Starts local audio mixing.

This method supports merging multiple audio streams into one audio stream locally. For example, merging the audio streams captured from the local microphone, and that from the media player, the sound card, and the remote users into one audio stream, and then publish the merged audio stream to the channel.

If you want to mix the locally captured audio streams, you can set publishMixedAudioTrack in ChannelMediaOptions to true, and then publish the mixed audio stream to the channel.
If you want to mix the remote audio stream, ensure that the remote audio stream has been published in the channel and you have subcribed to the audio stream that you need to mix. Applicable scenarios: You can enable this function in the following scenarios:
By utilizing the local video mixing feature, the associated audio streams of the mixed video streams can be simultaneously captured and published.
In live streaming scenarios, users can receive audio streams within the channel, mix multiple audio streams locally, and then forward the mixed audio stream to other channels.
In online classes, teachers can mix the audio from interactions with students locally and then forward the mixed audio stream to other channels. Call timing: You can call this method either before or after joining a channel.

Note: To ensure audio quality, it is recommended that the number of audio streams to be mixed does not exceed 10.

Parameters

config The configurations for mixing the lcoal audio. See LocalAudioMixerConfiguration.

Returns

0: Success.
< 0: Failure.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.

◆ updateLocalAudioMixerConfiguration()

virtual int agora::rtc::IRtcEngine::updateLocalAudioMixerConfiguration ( const LocalAudioMixerConfiguration & config )

pure virtual

Updates the configurations for mixing audio streams locally.

After calling startLocalAudioMixer, call this method if you want to update the local audio mixing configuration. Call timing: Call this method after startLocalAudioMixer.

Note: To ensure audio quality, it is recommended that the number of audio streams to be mixed does not exceed 10.

Parameters

config The configurations for mixing the lcoal audio. See LocalAudioMixerConfiguration.

Returns

0: Success.
< 0: Failure.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.

◆ stopLocalAudioMixer()

virtual int agora::rtc::IRtcEngine::stopLocalAudioMixer ( )

pure virtual

Stops the local audio mixing.

After calling startLocalAudioMixer, call this method if you want to stop the local audio mixing. Call timing: Call this method after startLocalAudioMixer.

Returns

0: Success.
< 0: Failure.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.

◆ startCameraCapture()

virtual int agora::rtc::IRtcEngine::startCameraCapture	(	VIDEO_SOURCE_TYPE	sourceType,
		const CameraCapturerConfiguration &	config
	)

pure virtual

Starts camera capture.

You can call this method to start capturing video from one or more cameras by specifying sourceType.

Note: On the iOS platform, if you want to enable multi-camera capture, you need to call enableMultiCamera and set enabled to true before calling this method.

Parameters

sourceType	The type of the video source. See `VIDEO_SOURCE_TYPE`. Note: On iOS devices, you can capture video from up to 2 cameras, provided the device has multiple cameras or supports external cameras. On Android devices, you can capture video from up to 4 cameras, provided the device has multiple cameras or supports external cameras. On the desktop platforms, you can capture video from up to 4 cameras.
config	The configuration of the video capture. See `CameraCapturerConfiguration`. Note: On the iOS platform, this parameter has no practical function. Use the `config` parameter in `enableMultiCamera` instead to set the video capture configuration.

Returns

0: Success.
< 0: Failure.

◆ stopCameraCapture()

virtual int agora::rtc::IRtcEngine::stopCameraCapture ( VIDEO_SOURCE_TYPE sourceType )

pure virtual

Stops camera capture.

After calling startCameraCapture to start capturing video through one or more cameras, you can call this method and set the sourceType parameter to stop the capture from the specified cameras.

Note: If you are using the local video mixing function, calling this method can cause the local video mixing to be interrupted. On the iOS platform, if you want to disable multi-camera capture, you need to call enableMultiCamera after calling this method and set enabled to false.

Parameters

sourceType The type of the video source. See VIDEO_SOURCE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ setCameraDeviceOrientation()

virtual int agora::rtc::IRtcEngine::setCameraDeviceOrientation	(	VIDEO_SOURCE_TYPE	type,
		VIDEO_ORIENTATION	orientation
	)

pure virtual

Sets the rotation angle of the captured video.

Note

This method applies to Windows only.
You must call this method after enableVideo. The setting result will take effect after the camera is successfully turned on, that is, after the SDK triggers the onLocalVideoStateChanged callback and returns the local video state as LOCAL_VIDEO_STREAM_STATE_CAPTURING (1).
When the video capture device does not have the gravity sensing function, you can call this method to manually adjust the rotation angle of the captured video.

Parameters

type	The video source type. See `VIDEO_SOURCE_TYPE`.
orientation	The clockwise rotation angle. See `VIDEO_ORIENTATION`.

Returns

0: Success.
< 0: Failure.

◆ setScreenCaptureOrientation()

virtual int agora::rtc::IRtcEngine::setScreenCaptureOrientation	(	VIDEO_SOURCE_TYPE	type,
		VIDEO_ORIENTATION	orientation
	)

pure virtual

Sets the rotation angle of the video captured by the screen.

When the screen capture device does not have the gravity sensing function, you can call this method to manually adjust the rotation angle of the captured video.

Parameters

type	The video source type. See #VIDEO_SOURCE_TYPE.
orientation	The clockwise rotation angle. See #VIDEO_ORIENTATION.

Returns

0: Success.
< 0: Failure.

◆ startScreenCapture()

virtual int agora::rtc::IRtcEngine::startScreenCapture	(	VIDEO_SOURCE_TYPE	sourceType,
		const ScreenCaptureConfiguration &	config
	)

pure virtual

Starts screen capture from the specified video source.

Applicable scenarios: In the screen sharing scenario, you need to call this method to start capturing the screen video stream. The SDK supports a series of methods for screen capturing, with the following distinctions between them. Please choose according to the actual scenario:

startScreenCapture(const ScreenCaptureParameters2& captureParams) / startScreenCaptureByDisplayId / startScreenCaptureByWindowId: Only supports capturing a single screen or window, suitable for scenarios where only a single screen is shared.
startScreenCapture(VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration& config): Supports specifying multiple video sources to capture multiple screen sharing streams, used for local video mixing or multi-channel scenarios. Call timing: You can call this method either before or after joining the channel, with the following differences:
Call this method first and then call joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join channel and set publishScreenCaptureVideo to true to start screen sharing.
Call this method after joining a channel, then call updateChannelMediaOptions and set publishScreenCaptureVideo to true to start screen sharing.

Note

If you start screen capture by calling this method, you need to call stopScreenCapture(VIDEO_SOURCE_TYPE sourceType) to stop screen capture.
On the Windows platform, it supports up to four screen capture video streams.
On the macOS platform, it supports only one screen capture video stream. This method applies to the macOS and Windows only.

Parameters

sourceType	The type of the video source. See `VIDEO_SOURCE_TYPE`.Attention: On the macOS platform, this parameter can only be set to VIDEO_SOURCE_SCREEN (2).
config	The configuration of the captured screen. See `ScreenCaptureConfiguration`.

Returns

0: Success.
< 0: Failure.

◆ stopScreenCapture()

virtual int agora::rtc::IRtcEngine::stopScreenCapture ( VIDEO_SOURCE_TYPE sourceType )

pure virtual

Stops screen capture from the specified video source.

Applicable scenarios: If you start screen capture from one or more screens by calling startScreenCapture(VIDEO_SOURCE_TYPE sourceType, const ScreenCaptureConfiguration& config), you need to call this method to stop screen capture, specifying the screen through the sourceType parameter. Call timing: You can call this method either before or after joining a channel.

Note: This method applies to the macOS and Windows only.

Parameters

sourceType The type of the video source. See VIDEO_SOURCE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ getConnectionState()

virtual CONNECTION_STATE_TYPE agora::rtc::IRtcEngine::getConnectionState ( )

pure virtual

Gets the current connection state of the SDK.

Call timing: This method can be called either before or after joining the channel.

Returns: The current connection state. See CONNECTION_STATE_TYPE.

◆ registerPacketObserver()

virtual int agora::rtc::IRtcEngine::registerPacketObserver ( IPacketObserver * observer )

pure virtual

Registers a packet observer.

Call this method registers a packet observer. When the Agora SDK triggers IPacketObserver callbacks registered by for voice or video packet transmission, you can call this method to process the packets, such as encryption and decryption.

Note

The size of the packet sent to the network after processing should not exceed 1200 bytes, otherwise, the SDK may fail to send the packet.
Ensure that both receivers and senders call this method; otherwise, you may meet undefined behaviors such as no voice and black screen.
When you use the Media Push or recording functions, Agora doesn't recommend calling this method.
Call this method before joining a channel.

Parameters

observer IPacketObserver.

Returns

0: Success.
< 0: Failure.

◆ enableEncryption()

virtual int agora::rtc::IRtcEngine::enableEncryption	(	bool	enabled,
		const EncryptionConfig &	config
	)

pure virtual

Enables or disables the built-in encryption.

After the user leaves the channel, the SDK automatically disables the built-in encryption. To enable the built-in encryption, call this method before the user joins the channel again. Applicable scenarios: Scenarios with higher security requirements. Call timing: Call this method before joining a channel.

Note

All users within the same channel must set the same encryption configurations when calling this method.
If you enable the built-in encryption, you cannot use the Media Push function.

Parameters

enabled	Whether to enable built-in encryption: true: Enable the built-in encryption. false: (Default) Disable the built-in encryption.
config	Built-in encryption configurations. See `EncryptionConfig`.

Returns

0: Success.
< 0: Failure.
- -2: An invalid parameter is used. Set the parameter with a valid value.
- -4: The built-in encryption mode is incorrect or the SDK fails to load the external encryption library. Check the enumeration or reload the external encryption library.
- -7: The SDK is not initialized. Initialize the IRtcEngine instance before calling this method.

◆ createDataStream() [1/2]

virtual int agora::rtc::IRtcEngine::createDataStream	(	int *	streamId,
		bool	reliable,
		bool	ordered
	)

pure virtual

Creates a data stream.

You can call this method to create a data stream and improve the reliability and ordering of data transmission. Call timing: You can call this method either before or after joining a channel. Related callbacks: After setting reliable to true, if the recipient does not receive the data within five seconds, the SDK triggers the onStreamMessageError callback and returns an error code.

Note: Each user can create up to five data streams during the lifecycle of IRtcEngine. The data stream will be destroyed when leaving the channel, and the data stream needs to be recreated if needed. If you need a more comprehensive solution for low-latency, high-concurrency, and scalable real-time messaging and status synchronization, it is recommended to use Signaling.

Parameters

streamId	An output parameter; the ID of the data stream created.
reliable	Sets whether the recipients are guaranteed to receive the data stream within five seconds: `true`: The recipients receive the data from the sender within five seconds. If the recipient does not receive the data within five seconds, the SDK triggers the `onStreamMessageError` callback and returns an error code. `false`: There is no guarantee that the recipients receive the data stream within five seconds and no error message is reported for any delay or missing data stream. Attention: Please ensure that `reliable` and `ordered` are either both set to`true` or both set to `false`.
ordered	Sets whether the recipients receive the data stream in the sent order: `true`: The recipients receive the data in the sent order. `false`: The recipients do not receive the data in the sent order.

Returns

0: The data stream is successfully created.
< 0: Failure.

◆ createDataStream() [2/2]

virtual int agora::rtc::IRtcEngine::createDataStream	(	int *	streamId,
		const DataStreamConfig &	config
	)

pure virtual

Creates a data stream.

Compared to createDataStream(int* streamId, bool reliable, bool ordered), this method does not guarantee the reliability of data transmission. If a data packet is not received five seconds after it was sent, the SDK directly discards the data. Call timing: You can call this method either before or after joining a channel.

Note: Each user can create up to five data streams during the lifecycle of IRtcEngine. The data stream will be destroyed when leaving the channel, and the data stream needs to be recreated if needed. If you need a more comprehensive solution for low-latency, high-concurrency, and scalable real-time messaging and status synchronization, it is recommended to use Signaling.

Parameters

streamId	An output parameter; the ID of the data stream created.
config	The configurations for the data stream. See `DataStreamConfig`.

Returns

0: The data stream is successfully created.
< 0: Failure.

◆ sendStreamMessage()

virtual int agora::rtc::IRtcEngine::sendStreamMessage	(	int	streamId,
		const char *	data,
		size_t	length
	)

pure virtual

Sends data stream messages.

After calling createDataStream(int* streamId, const DataStreamConfig& config), you can call this method to send data stream messages to all users in the channel. The SDK has the following restrictions on this method:

Each client within the channel can have up to 5 data channels simultaneously, with a total shared packet bitrate limit of 30 KB/s for all data channels.
Each data channel can send up to 60 packets per second, with each packet being a maximum of 1 KB. A successful method call triggers the onStreamMessage callback on the remote client, from which the remote user gets the stream message. A failed method call triggers the onStreamMessageError callback on the remote client.

Note

If you need a more comprehensive solution for low-latency, high-concurrency, and scalable real-time messaging and status synchronization, it is recommended to use Signaling.

This method needs to be called after createDataStream(int* streamId, const DataStreamConfig& config) and joining the channel.
This method applies to broadcasters only.

Parameters

streamId	The data stream ID. You can get the data stream ID by calling `createDataStream(int* streamId, const DataStreamConfig& config)`
data	The message to be sent.
length	The length of the data.

Returns

0: Success.
< 0: Failure.

◆ sendRdtMessage()

virtual int agora::rtc::IRtcEngine::sendRdtMessage	(	uid_t	uid,
		RdtStreamType	type,
		const char *	data,
		size_t	length
	)

pure virtual

Send Reliable message to remote uid in channel.

@technical preview

Parameters

uid	remote user id.
type	Reliable Data Transmission tunnel message type. See RdtStreamType
data	The pointer to the sent data.
length	The length of the sent data.

Returns

0: Success.
< 0: Failure.

◆ sendMediaControlMessage()

virtual int agora::rtc::IRtcEngine::sendMediaControlMessage	(	uid_t	uid,
		const char *	data,
		size_t	length
	)

pure virtual

Send media control message.

@technical preview

Parameters

uid	Remote user id. In particular, if the uid is set to 0, it means broadcasting the message to the entire channel.
data	The pointer to the sent data.
length	The length of the sent data, max 1024.

Returns

0: Success.
< 0: Failure.

◆ addVideoWatermark() [1/3]

virtual int agora::rtc::IRtcEngine::addVideoWatermark ( const RtcImage & watermark )

pure virtual

Adds a watermark image to the local video.

This method adds a PNG watermark image to the local video stream in a live streaming session. Once the watermark image is added, all the users in the channel (CDN audience included) and the video capturing device can see and capture it. If you only want to add a watermark to the CDN live streaming, see startRtmpStreamWithTranscoding.

Note

The URL descriptions are different for the local video and CDN live streaming: In a local video stream, URL refers to the absolute path of the added watermark image file in the local video stream. In a CDN live stream, URL refers to the URL address of the added watermark image in the CDN live streaming.
The source file of the watermark image must be in the PNG file format. If the width and height of the PNG file differ from your settings in this method, the PNG file will be cropped to conform to your settings.
The Agora SDK supports adding only one watermark image onto a local video or CDN live stream. The newly added watermark image replaces the previous one.

Parameters

watermark The watermark image to be added to the local live streaming: RtcImage.

Returns

0: Success.
< 0: Failure.

◆ addVideoWatermark() [2/3]

virtual int agora::rtc::IRtcEngine::addVideoWatermark	(	const char *	watermarkUrl,
		const WatermarkOptions &	options
	)

pure virtual

Adds a watermark image to the local video.

Deprecated:: Use addVideoWatermarkEx(const WatermarkConfig& config, const RtcConnection& connection) instead.

This method adds a PNG watermark image to the local video in the live streaming. Once the watermark image is added, all the audience in the channel (CDN audience included), and the capturing device can see and capture it. The Agora SDK supports adding only one watermark image onto a live video stream. The newly added watermark image replaces the previous one. The watermark coordinates are dependent on the settings in the setVideoEncoderConfiguration method:

If the orientation mode of the encoding video ( ORIENTATION_MODE ) is fixed landscape mode or the adaptive landscape mode, the watermark uses the landscape orientation.
If the orientation mode of the encoding video ( ORIENTATION_MODE ) is fixed portrait mode or the adaptive portrait mode, the watermark uses the portrait orientation.
When setting the watermark position, the region must be less than the dimensions set in the setVideoEncoderConfiguration method; otherwise, the watermark image will be cropped. You can control the visibility of the watermark during preview by setting the visibleInPreview parameter when calling this method. However, whether it ultimately takes effect also depends on the position parameter you set when calling setupLocalVideo (the position of the video frame in the video link). Refer to the table below for details.| Observation position | visibleInPreview value | Watermark visibility | | -------------------------------— | -------------------— | -----------------— | | (Default) POSITION_POST_CAPTURER | true | Yes | | | false | No | | POSITION_PRE_ENCODER | true | Yes | | | false | Yes |

Note

Ensure that calling this method after enableVideo.
If you only want to add a watermark to the media push, you can call this method or the startRtmpStreamWithTranscoding method.
This method supports adding a watermark image in the PNG file format only. Supported pixel formats of the PNG image are RGBA, RGB, Palette, Gray, and Alpha_gray.
If the dimensions of the PNG image differ from your settings in this method, the image will be cropped or zoomed to conform to your settings.
If you have enabled the mirror mode for the local video, the watermark on the local video is also mirrored. To avoid mirroring the watermark, Agora recommends that you do not use the mirror and watermark functions for the local video at the same time. You can implement the watermark function in your application layer.

Parameters

watermarkUrl	The local file path of the watermark image to be added. This method supports adding a watermark image from the local absolute or relative file path.
options	The options of the watermark image to be added. See `WatermarkOptions`.

Returns

0: Success.
< 0: Failure.

◆ addVideoWatermark() [3/3]

virtual int agora::rtc::IRtcEngine::addVideoWatermark ( const WatermarkConfig & configs )

pure virtual

Adds a watermark image to the local video.

Since: 4.6.0

You can use this method to overlay a watermark image on the local video stream, and configure the watermark's position, size, and visibility in the preview using WatermarkConfig.

Parameters

configs Watermark configuration. See WatermarkConfig.

Returns

0: Success.
< 0: Failure.

◆ removeVideoWatermark()

virtual int agora::rtc::IRtcEngine::removeVideoWatermark ( const char * id )

pure virtual

Removes the watermark image from the local video.

Since: 4.6.0

This method removes a previously added watermark image from the local video stream using the specified unique ID.

Parameters

id	The ID of the watermark to be removed. This value should match the ID used when the watermark was added.

Returns

0: Success.
< 0: Failure.

◆ clearVideoWatermarks()

virtual int agora::rtc::IRtcEngine::clearVideoWatermarks ( )

pure virtual

Removes the watermark image from the video stream.

Returns

0: Success.
< 0: Failure.

◆ pauseAudio()

virtual int agora::rtc::IRtcEngine::pauseAudio ( )

pure virtual

Deprecated:: Use disableAudio() instead.

Disables the audio function in the channel.

Returns

int

0: Success.
< 0: Failure.

◆ resumeAudio()

virtual int agora::rtc::IRtcEngine::resumeAudio ( )

pure virtual

Deprecated:: Use enableAudio() instead.

Resumes the audio function in the channel.

Returns

int

0: Success.
< 0: Failure.

◆ enableWebSdkInteroperability()

virtual int agora::rtc::IRtcEngine::enableWebSdkInteroperability ( bool enabled )

pure virtual

Enables interoperability with the Agora Web SDK (applicable only in the live streaming.

Deprecated:: The Agora NG SDK enables the interoperablity with the Web SDK. scenarios).

You can call this method to enable or disable interoperability with the Agora Web SDK. If a channel has Web SDK users, ensure that you call this method, or the video of the Native user will be a black screen for the Web user. This method is only applicable in live streaming scenarios, and interoperability is enabled by default in communication scenarios.

Parameters

enabled

Whether to enable interoperability:

true: Enable interoperability.
false: (Default) Disable interoperability.

Returns

0: Success.
< 0: Failure.

◆ sendCustomReportMessage()

virtual int agora::rtc::IRtcEngine::sendCustomReportMessage	(	const char *	id,
		const char *	category,
		const char *	event,
		const char *	label,
		int	value
	)

pure virtual

Reports customized messages.

Agora supports reporting and analyzing customized messages. This function is in the beta stage with a free trial. The ability provided in its beta test version is reporting a maximum of 10 message pieces within 6 seconds, with each message piece not exceeding 256 bytes and each string not exceeding 100 bytes. To try out this function, contact support@agora.io and discuss the format of customized messages with us.

◆ registerMediaMetadataObserver()

virtual int agora::rtc::IRtcEngine::registerMediaMetadataObserver	(	IMetadataObserver *	observer,
		IMetadataObserver::METADATA_TYPE	type
	)

pure virtual

Registers the metadata observer.

You need to implement the IMetadataObserver class and specify the metadata type in this method. This method enables you to add synchronized metadata in the video stream for more diversified live interactive streaming, such as sending shopping links, digital coupons, and online quizzes. A successful call of this method triggers the getMaxMetadataSize callback.

Note: Call this method before joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options).

Parameters

observer	The metadata observer. See `IMetadataObserver`.
type	The metadata type. The SDK currently only supports `VIDEO_METADATA`. See `METADATA_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ unregisterMediaMetadataObserver()

virtual int agora::rtc::IRtcEngine::unregisterMediaMetadataObserver	(	IMetadataObserver *	observer,
		IMetadataObserver::METADATA_TYPE	type
	)

pure virtual

Unregisters the specified metadata observer.

Parameters

observer	The metadata observer. See `IMetadataObserver`.
type	The metadata type. The SDK currently only supports `VIDEO_METADATA`. See `METADATA_TYPE`.

Returns

0: Success.
< 0: Failure.

◆ startAudioFrameDump()

virtual int agora::rtc::IRtcEngine::startAudioFrameDump	(	const char *	channel_id,
		uid_t	uid,
		const char *	location,
		const char *	uuid,
		const char *	passwd,
		long	duration_ms,
		bool	auto_upload
	)

pure virtual

Start audio frame dump.

Optional location is: "pre_apm_proc", "apm", "pre_send_proc", "filter", "enc", "tx_mixer", "at_record", "atw_record" for audio sending. "dec", "mixed", "play", "rx_mixer", "playback_mixer", "pcm_source_playback_mixer", "pre_play_proc", "at_playout", "atw_playout" for audio receiving.

◆ stopAudioFrameDump()

virtual int agora::rtc::IRtcEngine::stopAudioFrameDump	(	const char *	channel_id,
		uid_t	uid,
		const char *	location
	)

pure virtual

Stops the audio frame dump.

◆ setAINSMode()

virtual int agora::rtc::IRtcEngine::setAINSMode	(	bool	enabled,
		AUDIO_AINS_MODE	mode
	)

pure virtual

Sets whether to enable the AI noise suppression function and set the noise suppression mode.

You can call this method to enable AI noise suppression function. Once enabled, the SDK automatically detects and reduces stationary and non-stationary noise from your audio on the premise of ensuring the quality of human voice. Stationary noise refers to noise signal with constant average statistical properties and negligibly small fluctuations of level within the period of observation. Common sources of stationary noises are:

Television;
Air conditioner;
Machinery, etc. Non-stationary noise refers to noise signal with huge fluctuations of level within the period of observation; common sources of non-stationary noises are:
Thunder;
Explosion;
Cracking, etc. Applicable scenarios: In scenarios such as co-streaming, online education and video meeting, this function can detect and reduce background noises to improve experience. Call timing: You can call this method either before or after joining a channel.

Note

This method relies on the AI noise suppression dynamic library libagora_ai_noise_suppression_extension.dll. If the dynamic library is deleted, the function cannot be enabled.
Agora does not recommend enabling this function on devices running Android 6.0 and below.

Parameters

enabled	Whether to enable the AI noise suppression function: `true`: Enable the AI noise suppression. `false`: (Default) Disable the AI noise suppression.
mode	The AI noise suppression modes. See `AUDIO_AINS_MODE`.

Returns

0: Success.
< 0: Failure.

◆ registerLocalUserAccount()

virtual int agora::rtc::IRtcEngine::registerLocalUserAccount	(	const char *	appId,
		const char *	userAccount
	)

pure virtual

Registers a user account.

Once registered, the user account can be used to identify the local user when the user joins the channel. After the registration is successful, the user account can identify the identity of the local user, and the user can use it to join the channel. This method is optional. If you want to join a channel using a user account, you can choose one of the following methods:

Call the registerLocalUserAccount method to register a user account, and then call the joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount) or joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount, const ChannelMediaOptions& options) method to join a channel, which can shorten the time it takes to enter the channel.
Call the joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount) or joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount, const ChannelMediaOptions& options) method to join a channel. Related callbacks: After successfully calling this method, the onLocalUserRegistered callback will be triggered on the local client to report the local user's UID and user account.

Note

Starting from v4.6.0, the SDK will no longer automatically map Int UID to the String userAccount used when registering a User Account. If you want to join a channel with the original String userAccount used during registration, call the joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount, const ChannelMediaOptions& options) method to join the channel, instead of calling joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) and pass in the Int UID obtained through this method
Ensure that the userAccount is unique in the channel.
To ensure smooth communication, use the same parameter type to identify the user. For example, if a user joins the channel with a UID, then ensure all the other users use the UID too. The same applies to the user account. If a user joins the channel with the Agora Web SDK, ensure that the ID of the user is set to the same parameter type.

Parameters

appId The App ID of your project on Agora Console.

userAccount

The user account. This parameter is used to identify the user in the channel for real-time audio and video engagement. You need to set and manage user accounts yourself and ensure that each user account in the same channel is unique. The maximum length of this parameter is 255 bytes. Ensure that you set this parameter and do not set it as NULL. Supported characters are as follow(89 in total):

The 26 lowercase English letters: a to z.
The 26 uppercase English letters: A to Z.
All numeric characters: 0 to 9.
Space
"!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "|", "~", ","

Returns

0: Success.
< 0: Failure.

◆ joinChannelWithUserAccount() [1/2]

virtual int agora::rtc::IRtcEngine::joinChannelWithUserAccount	(	const char *	token,
		const char *	channelId,
		const char *	userAccount
	)

pure virtual

Joins a channel with a User Account and Token.

Before calling this method, if you have not called registerLocalUserAccount to register a user account, when you call this method to join a channel, the SDK automatically creates a user account for you. Calling the registerLocalUserAccount method to register a user account, and then calling this method to join a channel can shorten the time it takes to enter the channel. Once a user joins the channel, the user subscribes to the audio and video streams of all the other users in the channel by default, giving rise to usage and billings. To stop subscribing to a specified stream or all remote streams, call the corresponding mute methods. Call timing: Call this method after initialize. Related callbacks: After the user successfully joins the channel, the SDK triggers the following callbacks:

The local client: onLocalUserRegistered, onJoinChannelSuccess and onConnectionStateChanged callbacks.
The remote client: The onUserJoined and onUserInfoUpdated callbacks if a user joins the channel in the COMMUNICATION profile, or if a host joins the channel in the LIVE_BROADCASTING profile.

Note

This method only supports users joining one channel at a time.
Users with different App IDs cannot call each other.
Before joining a channel, ensure that the App ID you use to generate a token is the same as that you pass in the initialize method; otherwise, you may fail to join the channel with the token. To ensure smooth communication, use the same parameter type to identify the user. For example, if a user joins the channel with a UID, then ensure all the other users use the UID too. The same applies to the user account. If a user joins the channel with the Agora Web SDK, ensure that the ID of the user is set to the same parameter type.

Parameters

token	The token generated on your server for authentication. See .Note: (Recommended) If your project has enabled the security mode (using APP ID and Token for authentication), this parameter is required. If you have only enabled the testing mode (using APP ID for authentication), this parameter is optional. You will automatically exit the channel 24 hours after successfully joining in. If you need to join different channels at the same time or switch between channels, Agora recommends using a wildcard token so that you don't need to apply for a new token every time joining a channel. See `Secure authentication with tokens`.
channelId	The channel name. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
userAccount	The user account. This parameter is used to identify the user in the channel for real-time audio and video engagement. You need to set and manage user accounts yourself and ensure that each user account in the same channel is unique. The maximum length of this parameter is 255 bytes. Ensure that you set this parameter and do not set it as NULL. Supported characters are as follows(89 in total): The 26 lowercase English letters: a to z. The 26 uppercase English letters: A to Z. All numeric characters: 0 to 9. Space "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid, the uid parameter is not set to an integer, or the value of a member in ChannelMediaOptions is invalid. You need to pass in a valid parameter and join the channel again.
- -3: Fails to initialize the IRtcEngine object. You need to reinitialize the IRtcEngine object.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The typical cause is that after calling startEchoTest to start a call loop test, you call this method to join the channel without calling stopEchoTest to stop the test. You need to call stopEchoTest before calling this method.
- -17: The request to join the channel is rejected. The typical cause is that the user is already in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. Do not call this method to join the channel unless you receive the CONNECTION_STATE_DISCONNECTED (1) state.
- -102: The channel name is invalid. You need to pass in a valid channel name in channelId to rejoin the channel.
- -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.

◆ joinChannelWithUserAccount() [2/2]

virtual int agora::rtc::IRtcEngine::joinChannelWithUserAccount	(	const char *	token,
		const char *	channelId,
		const char *	userAccount,
		const ChannelMediaOptions &	options
	)

pure virtual

Join a channel using a user account and token, and set the media options.

Before calling this method, if you have not called registerLocalUserAccount to register a user account, when you call this method to join a channel, the SDK automatically creates a user account for you. Calling the registerLocalUserAccount method to register a user account, and then calling this method to join a channel can shorten the time it takes to enter the channel. Compared to joinChannelWithUserAccount(const char* token, const char* channelId, const char* userAccount), this method has the options parameter which is used to set media options, such as whether to publish audio and video streams within a channel. By default, the user subscribes to the audio and video streams of all the other users in the channel, giving rise to usage and billings. To stop subscribing to other streams, set the options parameter or call the corresponding mute methods. Call timing: Call this method after initialize. Related callbacks: After the user successfully joins the channel, the SDK triggers the following callbacks:

The local client: onLocalUserRegistered, onJoinChannelSuccess and onConnectionStateChanged callbacks.
The remote client: The onUserJoined and onUserInfoUpdated callbacks if a user joins the channel in the COMMUNICATION profile, or if a host joins the channel in the LIVE_BROADCASTING profile.

Note

This method only supports users joining one channel at a time.
Users with different App IDs cannot call each other.
Before joining a channel, ensure that the App ID you use to generate a token is the same as that you pass in the initialize method; otherwise, you may fail to join the channel with the token. To ensure smooth communication, use the same parameter type to identify the user. For example, if a user joins the channel with a UID, then ensure all the other users use the UID too. The same applies to the user account. If a user joins the channel with the Agora Web SDK, ensure that the ID of the user is set to the same parameter type.

Parameters

token	The token generated on your server for authentication. See .Note: (Recommended) If your project has enabled the security mode (using APP ID and Token for authentication), this parameter is required. If you have only enabled the testing mode (using APP ID for authentication), this parameter is optional. You will automatically exit the channel 24 hours after successfully joining in. If you need to join different channels at the same time or switch between channels, Agora recommends using a wildcard token so that you don't need to apply for a new token every time joining a channel. See `Secure authentication with tokens`.
channelId	The channel name. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
userAccount	The user account. This parameter is used to identify the user in the channel for real-time audio and video engagement. You need to set and manage user accounts yourself and ensure that each user account in the same channel is unique. The maximum length of this parameter is 255 bytes. Ensure that you set this parameter and do not set it as NULL. Supported characters are as follows(89 in total): The 26 lowercase English letters: a to z. The 26 uppercase English letters: A to Z. All numeric characters: 0 to 9. Space "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
options	The channel media options. See `ChannelMediaOptions`.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid, the uid parameter is not set to an integer, or the value of a member in ChannelMediaOptions is invalid. You need to pass in a valid parameter and join the channel again.
- -3: Fails to initialize the IRtcEngine object. You need to reinitialize the IRtcEngine object.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The typical cause is that after calling startEchoTest to start a call loop test, you call this method to join the channel without calling stopEchoTest to stop the test. You need to call stopEchoTest before calling this method.
- -17: The request to join the channel is rejected. The typical cause is that the user is already in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. Do not call this method to join the channel unless you receive the CONNECTION_STATE_DISCONNECTED (1) state.
- -102: The channel name is invalid. You need to pass in a valid channel name in channelId to rejoin the channel.
- -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.

◆ joinChannelWithUserAccountEx()

virtual int agora::rtc::IRtcEngine::joinChannelWithUserAccountEx	(	const char *	token,
		const char *	channelId,
		const char *	userAccount,
		const ChannelMediaOptions &	options,
		IRtcEngineEventHandler *	eventHandler
	)

pure virtual

Join a channel using a user account and token, and set the media options.

Before calling this method, if you have not called registerLocalUserAccount to register a user account, when you call this method to join a channel, the SDK automatically creates a user account for you. Calling the registerLocalUserAccount method to register a user account, and then calling this method to join a channel can shorten the time it takes to enter the channel. Once a user joins the channel, the user subscribes to the audio and video streams of all the other users in the channel by default, giving rise to usage and billings. If you want to stop subscribing to the media stream of other users, you can set the options parameter or call the corresponding mute method. Call timing: Call this method after initialize. Related callbacks: After the user successfully joins the channel, the SDK triggers the following callbacks:

The local client: onLocalUserRegistered, onJoinChannelSuccess and onConnectionStateChanged callbacks.
The remote client: The onUserJoined and onUserInfoUpdated callbacks if a user joins the channel in the COMMUNICATION profile, or if a host joins the channel in the LIVE_BROADCASTING profile.

Note

This method only supports users joining one channel at a time.
Users with different App IDs cannot call each other.
Before joining a channel, ensure that the App ID you use to generate a token is the same as that you pass in the initialize method; otherwise, you may fail to join the channel with the token. To ensure smooth communication, use the same parameter type to identify the user. For example, if a user joins the channel with a UID, then ensure all the other users use the UID too. The same applies to the user account. If a user joins the channel with the Agora Web SDK, ensure that the ID of the user is set to the same parameter type.

Parameters

token	The token generated on your server for authentication. See .Note: (Recommended) If your project has enabled the security mode (using APP ID and Token for authentication), this parameter is required. If you have only enabled the testing mode (using APP ID for authentication), this parameter is optional. You will automatically exit the channel 24 hours after successfully joining in. If you need to join different channels at the same time or switch between channels, Agora recommends using a wildcard token so that you don't need to apply for a new token every time joining a channel. See `Secure authentication with tokens`.
channelId	The channel name. This parameter signifies the channel in which users engage in real-time audio and video interaction. Under the premise of the same App ID, users who fill in the same channel ID enter the same channel for audio and video interaction. The string length must be less than 64 bytes. Supported characters (89 characters in total): All lowercase English letters: a to z. All uppercase English letters: A to Z. All numeric characters: 0 to 9. "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
userAccount	The user account. This parameter is used to identify the user in the channel for real-time audio and video engagement. You need to set and manage user accounts yourself and ensure that each user account in the same channel is unique. The maximum length of this parameter is 255 bytes. Ensure that you set this parameter and do not set it as NULL. Supported characters are as follows(89 in total): The 26 lowercase English letters: a to z. The 26 uppercase English letters: A to Z. All numeric characters: 0 to 9. Space "!", "#", "$", "%", "&", "(", ")", "+", "-", ":", ";", "<", "=", ".", ">", "?", "@", "[", "]", "^", "_", "{", "}", "\|", "~", ","
options	The channel media options. See `ChannelMediaOptions`.
eventHandler	The callback class of `IRtcEngineEx`. See `IRtcEngineEventHandler`. You can get the callback events of multiple channels through the `eventHandler` object passed in this parameter.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid. For example, the token is invalid, the uid parameter is not set to an integer, or the value of a member in ChannelMediaOptions is invalid. You need to pass in a valid parameter and join the channel again.
- -3: Fails to initialize the IRtcEngine object. You need to reinitialize the IRtcEngine object.
- -7: The IRtcEngine object has not been initialized. You need to initialize the IRtcEngine object before calling this method.
- -8: The internal state of the IRtcEngine object is wrong. The typical cause is that after calling startEchoTest to start a call loop test, you call this method to join the channel without calling stopEchoTest to stop the test. You need to call stopEchoTest before calling this method.
- -17: The request to join the channel is rejected. The typical cause is that the user is already in the channel. Agora recommends that you use the onConnectionStateChanged callback to see whether the user is in the channel. Do not call this method to join the channel unless you receive the CONNECTION_STATE_DISCONNECTED (1) state.
- -102: The channel name is invalid. You need to pass in a valid channel name in channelId to rejoin the channel.
- -121: The user ID is invalid. You need to pass in a valid user ID in uid to rejoin the channel.

◆ getUserInfoByUserAccount()

virtual int agora::rtc::IRtcEngine::getUserInfoByUserAccount	(	const char *	userAccount,
		rtc::UserInfo *	userInfo
	)

pure virtual

Gets the user information by passing in the user account.

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 the onUserInfoUpdated callback on the local client. After receiving the callback, you can call this method and pass in the user account to get the UID of the remote user from the UserInfo object. Call timing: Call this method after receiving the onUserInfoUpdated callback. Related callbacks: onUserInfoUpdated

Parameters

userAccount	The user account.
userInfo	Input and output parameter. The `UserInfo` object that identifies the user information. Input value: A `UserInfo` object. Output: A `UserInfo` object that contains both the user account and UID.

Returns

0: Success.
< 0: Failure.

◆ getUserInfoByUid()

virtual int agora::rtc::IRtcEngine::getUserInfoByUid	(	uid_t	uid,
		rtc::UserInfo *	userInfo
	)

pure virtual

Gets the user information by passing in the user ID.

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 the onUserInfoUpdated callback on the local client. After receiving the callback, you can call this method and passi in the UID.to get the user account of the specified user from the UserInfo object. Call timing: Call this method after receiving the onUserInfoUpdated callback. Related callbacks: onUserInfoUpdated

Parameters

uid	The user ID.
userInfo	Input and output parameter. The `UserInfo` object that identifies the user information. Input value: A `UserInfo` object. Output: A `UserInfo` object that contains both the user account and UID.

Returns

0: Success.
< 0: Failure.

◆ startOrUpdateChannelMediaRelay()

virtual int agora::rtc::IRtcEngine::startOrUpdateChannelMediaRelay ( const ChannelMediaRelayConfiguration & configuration )

pure virtual

Starts relaying media streams across channels or updates channels for media relay.

Since: v4.2.0

The first successful call to this method starts relaying media streams from the source channel to the destination channels. To relay the media stream to other channels, or exit one of the current media relays, you can call this method again to update the destination channels. This feature supports relaying media streams to a maximum of six destination channels. After a successful method call, the SDK triggers the onChannelMediaRelayStateChanged callback, and this callback returns the state of the media stream relay. Common states are as follows:

If the onChannelMediaRelayStateChanged callback returns RELAY_STATE_RUNNING (2) and RELAY_OK (0), it means that the SDK starts relaying media streams from the source channel to the destination channel.
If the onChannelMediaRelayStateChanged callback returns RELAY_STATE_FAILURE (3), an exception occurs during the media stream relay.

Note

Call this method after joining the channel.
This method takes effect only when you are a host in a live streaming channel.
The relaying media streams across channels function needs to be enabled by contacting technical support.
Agora does not support string user accounts in this API.

Parameters

configuration The configuration of the media stream relay. See ChannelMediaRelayConfiguration.

Returns

0: Success.
< 0: Failure.
- -1: A general error occurs (no specified reason).
- -2: The parameter is invalid.
- -8: Internal state error. Probably because the user is not a broadcaster.

◆ stopChannelMediaRelay()

virtual int agora::rtc::IRtcEngine::stopChannelMediaRelay ( )

pure virtual

Stops the media stream relay. Once the relay stops, the host quits all the target channels.

After a successful method call, the SDK triggers the onChannelMediaRelayStateChanged callback. If the callback reports RELAY_STATE_IDLE (0) and RELAY_OK (0), the host successfully stops the relay.

Note: If the method call fails, the SDK triggers the onChannelMediaRelayStateChanged callback with the RELAY_ERROR_SERVER_NO_RESPONSE (2) or RELAY_ERROR_SERVER_CONNECTION_LOST (8) status code. You can call the leaveChannel(const LeaveChannelOptions& options) method to leave the channel, and the media stream relay automatically stops.

Returns

0: Success.
< 0: Failure.
- -5: The method call was rejected. There is no ongoing channel media relay.

◆ pauseAllChannelMediaRelay()

virtual int agora::rtc::IRtcEngine::pauseAllChannelMediaRelay ( )

pure virtual

Pauses the media stream relay to all target channels.

After the cross-channel media stream relay starts, you can call this method to pause relaying media streams to all target channels; after the pause, if you want to resume the relay, call resumeAllChannelMediaRelay.

Note: Call this method after startOrUpdateChannelMediaRelay.

Returns

0: Success.
< 0: Failure.
- -5: The method call was rejected. There is no ongoing channel media relay.

◆ resumeAllChannelMediaRelay()

virtual int agora::rtc::IRtcEngine::resumeAllChannelMediaRelay ( )

pure virtual

Resumes the media stream relay to all target channels.

After calling the pauseAllChannelMediaRelay method, you can call this method to resume relaying media streams to all destination channels.

Note: Call this method after pauseAllChannelMediaRelay.

Returns

0: Success.
< 0: Failure.
- -5: The method call was rejected. There is no paused channel media relay.

◆ setDirectCdnStreamingAudioConfiguration()

virtual int agora::rtc::IRtcEngine::setDirectCdnStreamingAudioConfiguration ( AUDIO_PROFILE_TYPE profile )

pure virtual

Sets the audio profile of the audio streams directly pushed to the CDN by the host.

Deprecated:: v4.6.0.

When you set the publishMicrophoneTrack or publishCustomAudioTrack in the DirectCdnStreamingMediaOptions as true to capture audios, you can call this method to set the audio profile.

Parameters

profile The audio profile, including the sampling rate, bitrate, encoding mode, and the number of channels. See AUDIO_PROFILE_TYPE.

Returns

0: Success.
< 0: Failure.

◆ setDirectCdnStreamingVideoConfiguration()

virtual int agora::rtc::IRtcEngine::setDirectCdnStreamingVideoConfiguration ( const VideoEncoderConfiguration & config )

pure virtual

Sets the video profile of the media streams directly pushed to the CDN by the host.

Deprecated:: v4.6.0.

This method only affects video streams captured by cameras or screens, or from custom video capture sources. That is, when you set publishCameraTrack or publishCustomVideoTrack in DirectCdnStreamingMediaOptions as true to capture videos, you can call this method to set the video profiles. If your local camera does not support the video resolution you set,the SDK automatically adjusts the video resolution to a value that is closest to your settings for capture, encoding or streaming, with the same aspect ratio as the resolution you set. You can get the actual resolution of the video streams through the onDirectCdnStreamingStats callback.

Parameters

config Video profile. See VideoEncoderConfiguration.Note: During CDN live streaming, Agora only supports setting ORIENTATION_MODE as ORIENTATION_MODE_FIXED_LANDSCAPE or ORIENTATION_MODE_FIXED_PORTRAIT.

Returns

0: Success.
< 0: Failure.

◆ startDirectCdnStreaming()

virtual int agora::rtc::IRtcEngine::startDirectCdnStreaming	(	IDirectCdnStreamingEventHandler *	eventHandler,
		const char *	publishUrl,
		const DirectCdnStreamingMediaOptions &	options
	)

pure virtual

Starts pushing media streams to the CDN directly.

Deprecated:: v4.6.0.

Aogra does not support pushing media streams to one URL repeatedly. Media options Agora does not support setting the value of publishCameraTrack and publishCustomVideoTrack as true, or the value of publishMicrophoneTrack and publishCustomAudioTrack as true at the same time. When choosing media setting options ( DirectCdnStreamingMediaOptions ), you can refer to the following examples: If you want to push audio and video streams captured by the host from a custom source, the media setting options should be set as follows:

publishCustomAudioTrack is set as true and call the pushAudioFrame method
publishCustomVideoTrack is set as true and call the pushVideoFrame method
publishCameraTrack is set as false (the default value)
publishMicrophoneTrack is set as false (the default value) As of v4.2.0, Agora SDK supports audio-only live streaming. You can set publishCustomAudioTrack or publishMicrophoneTrack in DirectCdnStreamingMediaOptions as true and call pushAudioFrame to push audio streams.

Note: Agora only supports pushing one audio and video streams or one audio streams to CDN.

Parameters

eventHandler	See `onDirectCdnStreamingStateChanged` and `onDirectCdnStreamingStats`.
publishUrl	The CDN live streaming URL.
options	The media setting options for the host. See `DirectCdnStreamingMediaOptions`.

Returns

0: Success.
< 0: Failure.

◆ stopDirectCdnStreaming()

virtual int agora::rtc::IRtcEngine::stopDirectCdnStreaming ( )

pure virtual

Stops pushing media streams to the CDN directly.

Deprecated:: v4.6.0.

Returns

0: Success.
< 0: Failure.

◆ updateDirectCdnStreamingMediaOptions()

virtual int agora::rtc::IRtcEngine::updateDirectCdnStreamingMediaOptions ( const DirectCdnStreamingMediaOptions & options )

pure virtual

Change the media source during the pushing

Deprecated:: v4.6.0.

Note: This method is temporarily not supported.

Parameters

options The direct cdn streaming media options: DirectCdnStreamingMediaOptions.

Returns

0: Success.
< 0: Failure.

◆ startRhythmPlayer()

virtual int agora::rtc::IRtcEngine::startRhythmPlayer	(	const char *	sound1,
		const char *	sound2,
		const AgoraRhythmPlayerConfig &	config
	)

pure virtual

Enables the virtual metronome.

After enabling the virtual metronome, the SDK plays the specified audio effect file from the beginning, and controls the playback duration of each file according to beatsPerMinute you set in AgoraRhythmPlayerConfig. For example, if you set beatsPerMinute as 60, the SDK plays one beat every second. If the file duration exceeds the beat duration, the SDK only plays the audio within the beat duration.
By default, the sound of the virtual metronome is published in the channel. If you want the sound to be heard by the remote users, you can set publishRhythmPlayerTrack in ChannelMediaOptions as true. Applicable scenarios: In music education, physical education and other scenarios, teachers usually need to use a metronome so that students can practice with the correct beat. The meter is composed of a downbeat and upbeats. The first beat of each measure is called a downbeat, and the rest are called upbeats. Call timing: This method can be called either before or after joining the channel. Related callbacks: After successfully calling this method, the SDK triggers the onRhythmPlayerStateChanged callback locally to report the status of the virtual metronome.

Parameters

sound1	The absolute path or URL address (including the filename extensions) of the file for the downbeat. For example, `C:\music\audio.mp4`. For the audio file formats supported by this method, see `What formats of audio files does the Agora RTC SDK support`.
sound2	The absolute path or URL address (including the filename extensions) of the file for the upbeats. For example, `C:\music\audio.mp4`. For the audio file formats supported by this method, see `What formats of audio files does the Agora RTC SDK support`.
config	The metronome configuration. See `AgoraRhythmPlayerConfig`.

Returns

0: Success.
< 0: Failure.
- -22: Cannot find audio effect files. Please set the correct paths for sound1 and sound2.

◆ stopRhythmPlayer()

virtual int agora::rtc::IRtcEngine::stopRhythmPlayer ( )

pure virtual

Disables the virtual metronome.

After calling startRhythmPlayer, you can call this method to disable the virtual metronome.

Note: This method is for Android and iOS only.

Returns

0: Success.
< 0: Failure.

◆ configRhythmPlayer()

virtual int agora::rtc::IRtcEngine::configRhythmPlayer ( const AgoraRhythmPlayerConfig & config )

pure virtual

Configures the virtual metronome.

After calling startRhythmPlayer, you can call this method to reconfigure the virtual metronome.
After enabling the virtual metronome, the SDK plays the specified audio effect file from the beginning, and controls the playback duration of each file according to beatsPerMinute you set in AgoraRhythmPlayerConfig. For example, if you set beatsPerMinute as 60, the SDK plays one beat every second. If the file duration exceeds the beat duration, the SDK only plays the audio within the beat duration.
By default, the sound of the virtual metronome is published in the channel. If you want the sound to be heard by the remote users, you can set publishRhythmPlayerTrack in ChannelMediaOptions as true. Call timing: This method can be called either before or after joining the channel. Related callbacks: After successfully calling this method, the SDK triggers the onRhythmPlayerStateChanged callback locally to report the status of the virtual metronome.

Parameters

config The metronome configuration. See AgoraRhythmPlayerConfig.

Returns

0: Success.
< 0: Failure.

◆ takeSnapshot() [1/2]

virtual int agora::rtc::IRtcEngine::takeSnapshot	(	uid_t	uid,
		const char *	filePath
	)

pure virtual

Takes a snapshot of a video stream.

This method takes a snapshot of a video stream from the specified user, generates a JPG image, and saves it to the specified path. Call timing: Call this method after joining a channel. Related callbacks: After a successful call of this method, the SDK triggers the onSnapshotTaken callback to report whether the snapshot is successfully taken, as well as the details for that snapshot.

Note

The method is asynchronous, and the SDK has not taken the snapshot when the method call returns.
When used for local video snapshots, this method takes a snapshot for the video streams specified in ChannelMediaOptions.
If the user's video has been preprocessed, for example, watermarked or beautified, the resulting snapshot includes the pre-processing effect.

Parameters

uid	The user ID. Set uid as 0 if you want to take a snapshot of the local user's video.
filePath	The local path (including filename extensions) of the snapshot. For example: Windows: `C:\Users\<user_name>\AppData\Local\Agora\<process_name>\example.jpg` iOS: `/App Sandbox/Library/Caches/example.jpg` macOS: `～/Library/Logs/example.jpg` Android: `/storage/emulated/0/Android/data/<package name>/files/example.jpg` Attention: Ensure that the path you specify exists and is writable.

Returns

0: Success.
< 0: Failure.

◆ takeSnapshot() [2/2]

virtual int agora::rtc::IRtcEngine::takeSnapshot	(	uid_t	uid,
		const media::SnapshotConfig &	config
	)

pure virtual

Takes a screenshot of the video at the specified observation point.

This method takes a snapshot of a video stream from the specified user, generates a JPG image, and saves it to the specified path. Call timing: Call this method after joining a channel. Related callbacks: After a successful call of this method, the SDK triggers the onSnapshotTaken callback to report whether the snapshot is successfully taken, as well as the details for that snapshot.

Note

The method is asynchronous, and the SDK has not taken the snapshot when the method call returns.
When used for local video snapshots, this method takes a snapshot for the video streams specified in ChannelMediaOptions.

Parameters

uid	The user ID. Set uid as 0 if you want to take a snapshot of the local user's video.
config	The configuration of the snaptshot. See `SnapshotConfig`.

Returns

0: Success.
< 0: Failure.

◆ enableContentInspect()

virtual int agora::rtc::IRtcEngine::enableContentInspect	(	bool	enabled,
		const media::ContentInspectConfig &	config
	)

pure virtual

Enables or disables video screenshot and upload.

When video screenshot and upload function is enabled, the SDK takes screenshots and uploads videos sent by local users based on the type and frequency of the module you set in ContentInspectConfig. After video screenshot and upload, the Agora server sends the callback notification to your app server in HTTPS requests and sends all screenshots to the third-party cloud storage service. Call timing: This method can be called either before or after joining the channel.

Note

Before calling this method, make sure you have enabled video screenshot and upload on Agora console.
When the video moderation module is set to video moderation via Agora self-developed extension( CONTENT_INSPECT_SUPERVISION ), the video screenshot and upload dynamic library libagora_content_inspect_extension.dll is required. Deleting this library disables the screenshot and upload feature.

Parameters

enabled	Whether to enalbe video screenshot and upload: `true`: Enables video screenshot and upload. `false`: Disables video screenshot and upload.
config	Screenshot and upload configuration. See `ContentInspectConfig`.

Returns

0: Success.
< 0: Failure.

◆ adjustCustomAudioPublishVolume()

virtual int agora::rtc::IRtcEngine::adjustCustomAudioPublishVolume	(	track_id_t	trackId,
		int	volume
	)

pure virtual

Adjusts the volume of the custom audio track played remotely.

If you want to change the volume of the audio played remotely, you need to call this method again.

Note: Ensure you have called the createCustomAudioTrack method to create a custom audio track before calling this method.

Parameters

trackId	The audio track ID. Set this parameter to the custom audio track ID returned in `createCustomAudioTrack`.
volume	The volume of the audio source. The value can range from 0 to 100. 0 means mute; 100 means the original volume.

Returns

0: Success.
< 0: Failure.

◆ adjustCustomAudioPlayoutVolume()

virtual int agora::rtc::IRtcEngine::adjustCustomAudioPlayoutVolume	(	track_id_t	trackId,
		int	volume
	)

pure virtual

Adjusts the volume of the custom audio track played locally.

If you want to change the volume of the audio to be played locally, you need to call this method again.

Note: Ensure you have called the createCustomAudioTrack method to create a custom audio track before calling this method.

Parameters

trackId	The audio track ID. Set this parameter to the custom audio track ID returned in `createCustomAudioTrack`.
volume	The volume of the audio source. The value can range from 0 to 100. 0 means mute; 100 means the original volume.

Returns

0: Success.
< 0: Failure.

◆ setCloudProxy()

virtual int agora::rtc::IRtcEngine::setCloudProxy ( CLOUD_PROXY_TYPE proxyType )

pure virtual

Sets up cloud proxy service.

Since: v3.3.0

When users' network access is restricted by a firewall, configure the firewall to allow specific IP addresses and ports provided by Agora; then, call this method to enable the cloud proxyType and set the cloud proxy type with the proxyType parameter. After successfully connecting to the cloud proxy, the SDK triggers the onConnectionStateChanged ( CONNECTION_STATE_CONNECTING, CONNECTION_CHANGED_SETTING_PROXY_SERVER ) callback. To disable the cloud proxy that has been set, call the setCloudProxy(NONE_PROXY). To change the cloud proxy type that has been set, call the setCloudProxy (NONE_PROXY) first, and then call the setCloudProxy to set the proxyType you want.

Note

Agora recommends that you call this method before joining a channel.
When a user is behind a firewall and uses the Force UDP cloud proxy, the services for Media Push and cohosting across channels are not available.
When you use the Force TCP cloud proxy, note that an error would occur when calling the startAudioMixing(const char* filePath, bool loopback, int cycle, int startPos) method to play online music files in the HTTP protocol. The services for Media Push and cohosting across channels use the cloud proxy with the TCP protocol.

Parameters

proxyType The type of the cloud proxy. See CLOUD_PROXY_TYPE. This parameter is mandatory. The SDK reports an error if you do not pass in a value.

Returns

0: Success.
< 0: Failure.
- -2: The parameter is invalid.
- -7: The SDK is not initialized.

◆ setLocalAccessPoint()

virtual int agora::rtc::IRtcEngine::setLocalAccessPoint ( const LocalAccessPointConfiguration & config )

pure virtual

Configures the connection to Agora's Private Media Server access module.

After successfully deploying the Agora Private Media Server and integrating the 4.x RTC SDK on intranet clients, you can call this method to specify the Local Access Point and assign the access module to the SDK. Call timing: This method must be called before joining a channel.

Note: This method takes effect only after deploying the Agora Hybrid Cloud solution. You can contact sales to learn more and deploy the Agora Hybrid Cloud.

Parameters

config Local Access Point configuration. See LocalAccessPointConfiguration.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ setAdvancedAudioOptions()

virtual int agora::rtc::IRtcEngine::setAdvancedAudioOptions	(	AdvancedAudioOptions &	options,
		int	sourceType = `0`
	)

pure virtual

Sets audio advanced options.

If you have advanced audio processing requirements, such as capturing and sending stereo audio, you can call this method to set advanced audio options.

Note: Call this method after calling joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options), enableAudio and enableLocalAudio.

Parameters

options The advanced options for audio. See AdvancedAudioOptions.

Returns

0: Success.
< 0: Failure.

◆ setAVSyncSource()

virtual int agora::rtc::IRtcEngine::setAVSyncSource	(	const char *	channelId,
		uid_t	uid
	)

pure virtual

Sets audio-video synchronization for the sender.

A user may use two separate devices to send audio and video streams. To ensure audio and video are synchronized on the receiving end, you can call this method on the video sender and pass in the channel name and user ID of the audio sender. The SDK will use the timestamp of the audio stream as the reference to automatically adjust the video stream, ensuring audio-video synchronization even if the two sending devices are on different uplink networks (e.g., Wi-Fi and 4G).

Note: Agora recommends that you call this method before joining a channel.

Parameters

channelId	The channel name of the audio sender.
uid	The user ID of the audio sender.

Returns

0: Success.
< 0: Failure. See Error Codes for details and resolution suggestions.

◆ enableVideoImageSource()

virtual int agora::rtc::IRtcEngine::enableVideoImageSource	(	bool	enable,
		const ImageTrackOptions &	options
	)

pure virtual

Sets whether to replace the current video feeds with images when publishing video streams.

When publishing video streams, you can call this method to replace the current video feeds with custom images. Once you enable this function, you can select images to replace the video feeds through the ImageTrackOptions parameter. If you disable this function, the remote users see the video feeds that you publish. Call timing: Call this method after joining a channel.

Parameters

enable	Whether to replace the current video feeds with custom images: `true`: Replace the current video feeds with custom images. `false`: (Default) Do not replace the current video feeds with custom images.
options	Image configurations. See `ImageTrackOptions`.

Returns

0: Success.
< 0: Failure.

◆ getCurrentMonotonicTimeInMs()

virtual int64_t agora::rtc::IRtcEngine::getCurrentMonotonicTimeInMs ( )

pure virtual

Gets the current Monotonic Time of the SDK.

Monotonic Time refers to a monotonically increasing time series whose value increases over time. The unit is milliseconds. In custom video capture and custom audio capture scenarios, in order to ensure audio and video synchronization, Agora recommends that you call this method to obtain the current Monotonic Time of the SDK, and then pass this value into the timestamp parameter in the captured video frame ( VideoFrame ) and audio frame ( AudioFrame ). Call timing: This method can be called either before or after joining the channel.

Returns

≥0: The method call is successful, and returns the current Monotonic Time of the SDK (in milliseconds).
< 0: Failure.

◆ getNetworkType()

virtual int agora::rtc::IRtcEngine::getNetworkType ( )

pure virtual

Gets the type of the local network connection.

You can use this method to get the type of network in use at any stage.

Note: You can call this method either before or after joining a channel.

Returns

≥ 0: The method call is successful, and the local network connection type is returned.
- 0: The SDK disconnects from the network.
- 1: The network type is LAN.
- 2: The network type is Wi-Fi (including hotspots).
- 3: The network type is mobile 2G.
- 4: The network type is mobile 3G.
- 5: The network type is mobile 4G.
- 6: The network type is mobile 5G.
< 0: The method call failed with an error code.
- -1: The network type is unknown.

◆ setParameters()

virtual int agora::rtc::IRtcEngine::setParameters ( const char * parameters )

pure virtual

Provides technical preview functionalities or special customizations by configuring the SDK with JSON options.

Contact technical support to get the JSON configuration method.

Parameters

parameters Pointer to the set parameters in a JSON string.

Returns

0: Success.
< 0: Failure.

◆ startMediaRenderingTracing()

virtual int agora::rtc::IRtcEngine::startMediaRenderingTracing ( )

pure virtual

Enables tracing the video frame rendering process.

Since: v4.1.1

The SDK starts tracing the rendering status of the video frames in the channel from the moment this method is successfully called and reports information about the event through the onVideoRenderingTracingResult callback. Applicable scenarios: Agora recommends that you use this method in conjunction with the UI settings (such as buttons and sliders) in your app to improve the user experience. For example, call this method when the user clicks the Join Channel button, and then get the time spent during the video frame rendering process through the onVideoRenderingTracingResult callback, so as to optimize the indicators accordingly.

Note

If you have not called this method, the SDK tracks the rendering events of the video frames from the moment you call joinChannel(const char* token, const char* channelId, uid_t uid, const ChannelMediaOptions& options) to join the channel. You can call this method at an appropriate time according to the actual application scenario to set the starting position for tracking video rendering events.
After the local user leaves the current channel, the SDK automatically tracks the video rendering events from the moment you join a channel.

Returns

0: Success.
< 0: Failure.
- -7: The method is called before IRtcEngine is initialized.

◆ enableInstantMediaRendering()

virtual int agora::rtc::IRtcEngine::enableInstantMediaRendering ( )

pure virtual

Enables audio and video frame instant rendering.

Since: v4.1.1

After successfully calling this method, the SDK enables the instant frame rendering mode, which can speed up the first frame rendering after the user joins the channel. Applicable scenarios: Agora recommends that you enable this mode for the audience in a live streaming scenario. Call timing: Call this method before joining a channel.

Note: Both the host and audience member need to call this method in order to experience instant rendering of audio and video frames. Once the method is successfully called, you can only cancel instant rendering by calling release to destroy the IRtcEngine object.

Returns

0: Success.
< 0: Failure.
- -7: The method is called before IRtcEngine is initialized.

◆ getNtpWallTimeInMs()

virtual uint64_t agora::rtc::IRtcEngine::getNtpWallTimeInMs ( )

pure virtual

Gets the current NTP (Network Time Protocol) time.

In the real-time chorus scenario, especially when the downlink connections are inconsistent due to network issues among multiple receiving ends, you can call this method to obtain the current NTP time as the reference time, in order to align the lyrics and music of multiple receiving ends and achieve chorus synchronization.

Returns: The Unix timestamp (ms) of the current NTP time.

◆ isFeatureAvailableOnDevice()

virtual bool agora::rtc::IRtcEngine::isFeatureAvailableOnDevice ( FeatureType type )

pure virtual

Checks whether the device supports the specified advanced feature.

Since: v4.3.0

Checks whether the capabilities of the current device meet the requirements for advanced features such as virtual background and image enhancement. Applicable scenarios: Before using advanced features, you can check whether the current device supports these features based on the call result. This helps to avoid performance degradation or unavailable features when enabling advanced features on low-end devices. Based on the return value of this method, you can decide whether to display or enable the corresponding feature button, or notify the user when the device's capabilities are insufficient.

Parameters

type	The type of the advanced feature, see `FeatureType`.

Returns

true: The current device supports the specified feature.
false: The current device does not support the specified feature.

◆ sendAudioMetadata()

virtual int agora::rtc::IRtcEngine::sendAudioMetadata	(	const char *	metadata,
		size_t	length
	)

pure virtual

send audio metadata

Since: v4.3.1

Parameters

metadata	The pointer of metadata
length	Size of metadata

Returns

0: success
<0: failure @technical preview

◆ queryHDRCapability()

virtual int agora::rtc::IRtcEngine::queryHDRCapability	(	VIDEO_MODULE_TYPE	videoModule,
		HDR_CAPABILITY &	capability
	)

pure virtual

Queries the HDR capability of the video module.

Since: v4.6.0

Parameters

videoModule	The video module. See VIDEO_MODULE_TYPE
capability	HDR capability of video module. See HDR_CAPABILITY

Returns

0: success
<0: failure @technical preview

Public Member Functions

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ release()

◆ initialize()

◆ queryInterface()

◆ getVersion()

◆ getErrorDescription()

◆ queryCodecCapability()

◆ queryDeviceScore()

◆ preloadChannel()

◆ preloadChannelWithUserAccount()

◆ updatePreloadChannelToken()

◆ joinChannel() [1/2]

◆ joinChannel() [2/2]

◆ updateChannelMediaOptions()

◆ leaveChannel() [1/2]

◆ leaveChannel() [2/2]

◆ renewToken()

◆ setChannelProfile()

◆ setClientRole() [1/2]

◆ setClientRole() [2/2]

◆ startEchoTest()

◆ stopEchoTest()

◆ enableVideo()

◆ disableVideo()

◆ startPreview() [1/2]

◆ startPreview() [2/2]

◆ stopPreview() [1/2]

◆ stopPreview() [2/2]

◆ startLastmileProbeTest()

◆ stopLastmileProbeTest()

◆ setVideoEncoderConfiguration()

◆ setBeautyEffectOptions()

◆ setFaceShapeBeautyOptions()

◆ setFaceShapeAreaOptions()

◆ getFaceShapeBeautyOptions()

◆ getFaceShapeAreaOptions()

◆ setFilterEffectOptions()

◆ createVideoEffectObject()

◆ destroyVideoEffectObject()

◆ setLowlightEnhanceOptions()

◆ setVideoDenoiserOptions()

◆ setColorEnhanceOptions()

◆ enableVirtualBackground()

◆ setupRemoteVideo()

◆ setupLocalVideo()

◆ setVideoScenario()

◆ setVideoQoEPreference()

◆ enableAudio()

◆ disableAudio()

◆ setAudioProfile() [1/2]

◆ setAudioProfile() [2/2]

◆ setAudioScenario()

◆ enableLocalAudio()

◆ muteLocalAudioStream()

◆ muteAllRemoteAudioStreams()

◆ muteRemoteAudioStream()

◆ muteLocalVideoStream()

◆ enableLocalVideo()

◆ muteAllRemoteVideoStreams()

◆ setRemoteDefaultVideoStreamType()

◆ muteRemoteVideoStream()

◆ setRemoteVideoStreamType()

◆ setRemoteVideoSubscriptionOptions()

◆ setSubscribeAudioBlocklist()

◆ setSubscribeAudioAllowlist()

◆ setSubscribeVideoBlocklist()

◆ setSubscribeVideoAllowlist()

◆ enableAudioVolumeIndication()

◆ startAudioRecording() [1/3]

◆ startAudioRecording() [2/3]

◆ startAudioRecording() [3/3]

◆ registerAudioEncodedFrameObserver()

◆ stopAudioRecording()

◆ createMediaPlayer()

◆ destroyMediaPlayer()

◆ createMediaRecorder()

◆ destroyMediaRecorder()