iOS SDK - QwenCloud

AOQ Client SDK iOS API reference, covering engine lifecycle, audio/video device management, codec configuration, media stream control, audio file playback, external audio streams, real-time messaging, frame callbacks, delegate protocols, and data types and enumerations.

API index

Engine lifecycle

API	Description
createEngine:delegate:	Create the engine instance (singleton)
destroy	Destroy the engine instance
getVersion	Get the SDK version string
connect:	Connect to the Relay server
disconnect	Disconnect from the server

Audio device management

API	Description
startAudioCapture:	Open the audio capture device (microphone)
stopAudioCapture	Close the audio capture device
muteAudioCapture:	Mute or unmute audio capture
startAudioPlayer:	Start audio playback (play remote audio)
stopAudioPlayer	Stop audio playback
pauseAudioPlayer:	Pause audio playback with optional fade-out
resumeAudioPlayer:	Resume audio playback with optional fade-in
interruptAudioPlayer:fadeMs:	Interrupt the current audio call turn
enableSpeakerphone:	Switch audio output between speaker and earpiece
isSpeakerphoneEnabled	Query whether the speaker is currently active
setAudioSessionRestriction:	Set AVAudioSession control permissions

Audio codec configuration

API	Description
setAudioEncoderConfig:	Set audio encoding parameters
setAudioDecoderConfig:	Set audio decoding parameters

Video device management

API	Description
startVideoCapture:	Open the video capture device (camera)
stopVideoCapture	Close the video capture device
switchCamera:	Switch between front and rear cameras
setLocalView:canvas:	Set or remove the local video rendering view
setRemoteView:canvas:	Set or remove the remote video rendering view

Video encoding and external input

API	Description
setVideoEncoderConfig:	Set video encoding parameters
pushExternalVideoCapturedFrame:frame:	Push an externally captured raw video frame
pushExternalVideoEncodedFrame:frame:	Push an externally encoded video frame

Media stream control

API	Description
enableSendMediaStream:enable:	Enable or disable local media stream sending

Audio file playback

API	Description
startAudioFile:config:	Start streaming a local audio file
stopAudioFile:	Stop audio file playback
pauseAudioFile:	Pause audio file playback
resumeAudioFile:	Resume audio file playback
getAudioFileDuration:	Get the total duration of the audio file
getAudioFileCurrentPosition:	Get the current playback position
setAudioFilePositionMillis:positionMillis:	Seek to a position in the audio file
setAudioFileVolume:type:volume:	Set the audio file volume
getAudioFileVolume:type:	Get the current audio file volume

External audio streams

API	Description
addAudioExternalStream:config:	Add an external audio stream
removeAudioExternalStream:	Remove an external audio stream
pushAudioExternalStreamData:data:	Push external PCM audio data
setAudioExternalStreamVolume:type:volume:	Set the volume for an external audio stream
getAudioExternalStreamVolume:type:	Get the volume for an external audio stream
clearAudioExternalStreamBuffer:fadeoutMs:	Clear the buffer for an external audio stream

Real-time messaging

API	Description
sendDataMsg:	Send a real-time data message

Audio frame callbacks

API	Description
setAudioFrameObserver:	Set the audio frame data callback delegate
enableAudioFrameObserver:audioSource:config:	Enable or disable audio frame callbacks at a specified point

Video frame callbacks

API	Description
setVideoFrameObserver:	Set the video frame data callback delegate
enableVideoFrameObserver:videoSource:config:	Enable or disable video frame callbacks at a specified point

AoqEngineDelegate callbacks

Callback	Description
onError:message:	Engine error callback
onWarning:message:	Engine warning callback
onConnectionStatusChange:	Connection state change callback
onStats:	Statistics callback
onAudioDeviceStateChanged:	Audio device state change callback
onAudioDeviceRouteChanged:	Audio output route change callback
onAudioDeviceInterrupted:	Audio device interruption callback
onVideoDeviceStateChanged:	Video device state change callback
onAudioFileState:	Audio file playback state callback
onDataMsg:	Real-time data message received callback
AoqAudioFrameDelegate	Audio frame data listener protocol
AoqVideoFrameDelegate	Video frame data listener protocol

API details

Engine lifecycle

createEngine:delegate:

Create the engine instance. The SDK holds the engine as a global singleton.

+ (instancetype _Nonnull)createEngine:(AoqCreateConfig * _Nonnull)config
                             delegate:(id<AoqEngineDelegate> _Nonnull)delegate;

destroy

+ (int)destroy;

getVersion

+ (NSString * _Nonnull)getVersion;

connect:

- (int)connect:(AoqConnectConfig * _Nonnull)config;

disconnect

- (int)disconnect;

Audio device management

- (int)startAudioCapture:(AoqAudioCaptureConfig * _Nonnull)config;
- (int)stopAudioCapture;
- (int)muteAudioCapture:(BOOL)mute;
- (int)startAudioPlayer:(AoqAudioPlaybackConfig * _Nonnull)config;
- (int)stopAudioPlayer;
- (int)pauseAudioPlayer:(NSInteger)fadeMs;
- (int)resumeAudioPlayer:(NSInteger)fadeMs;
- (int)interruptAudioPlayer:(AoqTrackType)trackType fadeMs:(NSInteger)fadeMs;
- (int)enableSpeakerphone:(BOOL)enable;
- (BOOL)isSpeakerphoneEnabled;
- (int)setAudioSessionRestriction:(int)restriction;

Audio codec configuration

- (int)setAudioEncoderConfig:(AoqAudioCodecConfig * _Nonnull)config;
- (int)setAudioDecoderConfig:(AoqAudioCodecConfig * _Nonnull)config;

Video device management

- (int)startVideoCapture:(AoqVideoCaptureConfig * _Nonnull)config;
- (int)stopVideoCapture;
- (int)switchCamera:(AoqCameraDirection)direction;
- (int)setLocalView:(AoqTrackType)trackType canvas:(AoqVideoCanvas * _Nullable)canvas;
- (int)setRemoteView:(AoqTrackType)trackType canvas:(AoqVideoCanvas * _Nullable)canvas;

Pass AoqTrackTypeVideo as the trackType parameter for setLocalView and setRemoteView.

Video encoding and external input

- (int)setVideoEncoderConfig:(AoqVideoCodecConfig * _Nonnull)config;
- (int)pushExternalVideoCapturedFrame:(AoqTrackType)trackType frame:(AoqVideoFrame * _Nonnull)frame;
- (int)pushExternalVideoEncodedFrame:(AoqTrackType)trackType frame:(AoqVideoEncodedFrame * _Nonnull)frame;

Pass AoqTrackTypeVideo as the trackType parameter.

Media stream control

- (int)enableSendMediaStream:(AoqTrackType)trackType enable:(BOOL)enable;

trackType accepts AoqTrackTypeAudio or AoqTrackTypeVideo.

Audio file playback

- (int)startAudioFile:(NSString * _Nonnull)fileId config:(AoqAudioFileMixConfig * _Nonnull)config;
- (int)stopAudioFile:(NSString * _Nonnull)fileId;
- (int)pauseAudioFile:(NSString * _Nonnull)fileId;
- (int)resumeAudioFile:(NSString * _Nonnull)fileId;
- (long long)getAudioFileDuration:(NSString * _Nonnull)fileId;
- (long long)getAudioFileCurrentPosition:(NSString * _Nonnull)fileId;
- (int)setAudioFilePositionMillis:(NSString * _Nonnull)fileId positionMillis:(long long)positionMillis;
- (int)setAudioFileVolume:(NSString * _Nonnull)fileId type:(AoqAudioStreamDirection)type volume:(NSInteger)volume;
- (int)getAudioFileVolume:(NSString * _Nonnull)fileId type:(AoqAudioStreamDirection)type;

External audio streams

- (int)addAudioExternalStream:(NSString * _Nonnull)streamId config:(AoqAudioExternalStreamConfig * _Nonnull)config;
- (int)pushAudioExternalStreamData:(NSString * _Nonnull)streamId data:(AoqAudioFrameData * _Nonnull)data;
- (int)setAudioExternalStreamVolume:(NSString * _Nonnull)streamId type:(AoqAudioStreamDirection)type volume:(NSInteger)volume;
- (int)getAudioExternalStreamVolume:(NSString * _Nonnull)streamId type:(AoqAudioStreamDirection)type;
- (void)clearAudioExternalStreamBuffer:(NSString * _Nonnull)streamId fadeoutMs:(NSInteger)fadeoutMs;
- (int)removeAudioExternalStream:(NSString * _Nonnull)streamId;

Real-time messaging

- (int)sendDataMsg:(AoqDataMsg * _Nonnull)msg;

Audio frame callbacks

- (int)setAudioFrameObserver:(id<AoqAudioFrameDelegate> _Nullable)delegate;
- (int)enableAudioFrameObserver:(BOOL)enabled audioSource:(AoqAudioSource)audioSource config:(AoqAudioObserverConfig * _Nonnull)config;

Video frame callbacks

- (int)setVideoFrameObserver:(id<AoqVideoFrameDelegate> _Nullable)delegate;
- (int)enableVideoFrameObserver:(BOOL)enabled videoSource:(AoqVideoSource)videoSource config:(AoqVideoObserverConfig * _Nonnull)config;

AoqEngineDelegate callbacks

All callback methods are @required.

- (void)onError:(NSInteger)code message:(NSString * _Nonnull)message;
- (void)onWarning:(NSInteger)code message:(NSString * _Nonnull)message;
- (void)onConnectionStatusChange:(AoqConnectionStatus)status;
- (void)onStats:(AoqStats * _Nonnull)stats;
- (void)onAudioDeviceStateChanged:(AoqAudioDeviceState * _Nonnull)state;
- (void)onAudioDeviceRouteChanged:(NSInteger)routeType;
- (void)onAudioDeviceInterrupted:(BOOL)interrupt;
- (void)onAudioFileState:(AoqAudioFileState * _Nonnull)state;
- (void)onVideoDeviceStateChanged:(AoqVideoDeviceState * _Nonnull)state;
- (void)onDataMsg:(AoqDataMsg * _Nonnull)msg;

AoqAudioFrameDelegate (@optional)

- (void)onCapturedAudioFrame:(AoqAudioFrameData * _Nonnull)frame;
- (void)onProcessCapturedAudioFrame:(AoqAudioFrameData * _Nonnull)frame;
- (void)onPublishAudioFrame:(AoqTrackType)trackType frame:(AoqAudioFrameData * _Nonnull)frame;
- (void)onPlaybackAudioFrame:(AoqAudioFrameData * _Nonnull)frame;

AoqVideoFrameDelegate (@optional)

- (BOOL)onCapturedVideoFrame:(AoqVideoFrame * _Nonnull)frame;
- (BOOL)onPreEncodeVideoFrame:(AoqTrackType)trackType frame:(AoqVideoFrame * _Nonnull)frame;
- (BOOL)onRemoteVideoFrame:(AoqTrackType)trackType frame:(AoqVideoFrame * _Nonnull)frame;

Data types and enumerations

AoqErrorCode

Enum value	Value	Description
AoqErrorCodeOK	0	Success
AoqErrorCodeParamInvalid	1	Invalid parameter
AoqErrorCodeStateInvalid	2	Invalid state
AoqErrorCodeUnSupport	3	Unsupported operation
AoqErrorCodeAudio	100	Audio generic error
AoqErrorCodeAudioExternalBufferFull	110	External audio buffer full
AoqErrorCodeAudioDevice	120	Audio device generic error
AoqErrorCodeAudioDeviceRecordingAuthFailed	121	Recording permission not granted
AoqErrorCodeAudioDeviceRecordingOccupied	122	Recording device in use
AoqErrorCodeAudioDeviceRecordingBackgroundStart	123	Failed to start recording in background
AoqErrorCodeAudioDeviceRecordingStartFail	124	Recording start failed
AoqErrorCodeAudioDevicePlayoutOccupied	125	Playback device in use
AoqErrorCodeAudioDevicePlayoutBackgroundStart	126	Failed to start playback in background
AoqErrorCodeAudioDevicePlayoutStartFail	127	Playback start failed
AoqErrorCodeAudioDeviceEarpieceRequiresVoipMode	128	Earpiece requires VoIP mode
AoqErrorCodeVideo	200	Video generic error
AoqErrorCodeVideoExternalBufferFull	210	External video buffer full
AoqErrorCodeVideoExternalCaptureNotEnabled	211	External video capture not enabled
AoqErrorCodeVideoExternalEncoderNotEnabled	212	External video encoder not enabled
AoqErrorCodeVideoDevice	220	Video device generic error
AoqErrorCodeVideoDeviceCameraOpenFail	221	Camera open failed
AoqErrorCodeVideoDeviceCameraAuthFailed	222	Camera permission not granted
AoqErrorCodeVideoDeviceCameraOccupied	223	Camera in use
AoqErrorCodeVideoDeviceCameraRunningError	224	Camera runtime error
AoqErrorCodeVideoCodec	230	Video codec generic error
AoqErrorCodeVideoCodecEncoderInitFail	231	Video encoder initialization failed
AoqErrorCodeVideoRender	240	Video rendering generic error
AoqErrorCodeVideoRenderCreateFail	241	Video renderer creation failed
AoqErrorCodeVideoRenderDrawError	242	Video rendering draw error

AoqTrackType

Enum value	Value	Description
AoqTrackTypeAudio	0	Audio track
AoqTrackTypeVideo	1	Video track
AoqTrackTypeData	2	Data messaging track

AoqConnectConfig

Field	Type	Description
token	NSString *	Authentication token
sid	NSString *	Session ID
certFingerprint	NSString *	Server certificate fingerprint
relayEndpoints	NSArray<AoqRelayEndpoint >	List of Relay endpoints
workspaceIdHash	NSString *	Workspace ID hash
publishTracks	NSArray<AoqTrackParam >	Local tracks to publish
subscribeTracks	NSArray<AoqTrackParam >	Remote tracks to subscribe to

AoqAudioPlaybackConfig

Field	Type	Default	Description
isVoipMode	BOOL	NO	YES: enable VoIP mode (hardware AEC); applies to mobile
isDefaultSpeaker	BOOL	YES	YES: default to speaker; NO: earpiece
isExternal	BOOL	NO	YES: external audio output
channel	NSInteger	1	Channel count: 1 or 2

Statistics types

AoqStats

Field	Type	Description
audioPublishStats	NSArray<AoqAudioPublishStats >	Audio publish statistics
videoPublishStats	NSArray<AoqVideoPublishStats >	Video publish statistics
dataMsgPublishStats	NSArray<AoqDataMsgPublishStats >	Data message publish statistics
audioSubscribeStats	NSArray<AoqAudioSubscribeStats >	Audio subscribe statistics
videoSubscribeStats	NSArray<AoqVideoSubscribeStats >	Video subscribe statistics
dataMsgSubscribeStats	NSArray<AoqDataMsgSubscribeStats >	Data message subscribe statistics
networkStats	AoqNetworkStats *	Network statistics

AoqNetworkStats

Field	Type	Description
sendBitrate	NSUInteger	Send bitrate (bps)
sendBytes	NSUInteger	Cumulative bytes sent
recvBitrate	NSUInteger	Receive bitrate (bps)
recvBytes	NSUInteger	Cumulative bytes received
loss	NSUInteger	Packet loss rate
rtt	NSUInteger	Round-trip time (ms)

AoqAudioPublishStats

trackType / bitrate / bytes / encodeVolume

AoqVideoPublishStats

trackType / bitrate / bytes / encodeFps

AoqAudioSubscribeStats

trackType / bitrate / bytes / playVolume

AoqVideoSubscribeStats

trackType / bitrate / bytes / decodeFps / renderFps

AoqDataMsgPublishStats / AoqDataMsgSubscribeStats

trackType / bitrate / bytes

Key differences from the Android SDK

Difference	iOS	Android
Callback pattern	`@protocol` delegate	Abstract class listener
AVAudioSession control	`setAudioSessionRestriction:` (iOS only)	No equivalent
Audio focus callback	None (uses `onAudioDeviceInterrupted:` instead)	`onAudioDeviceFocusChanged`
Video pixel format	Supports CVPixelBuffer zero-copy	Supports TextureOES / Texture2D
Video rendering view	UIView	SurfaceView / TextureView
Bluetooth mode config	No `isBTScoMode` (managed by the OS)	`AoqCreateConfig.isBTScoMode`
Video frame callback write-back	I420 / CVPixelBuffer	I420

​API index

​Engine lifecycle

​Audio device management

​Audio codec configuration

​Video device management

​Video encoding and external input

​Media stream control

​Audio file playback

​External audio streams

​Real-time messaging

​Audio frame callbacks

​Video frame callbacks

​AoqEngineDelegate callbacks

​API details

​Engine lifecycle

​createEngine:delegate:

​destroy

​getVersion

​connect:

​disconnect

​Audio device management

​Audio codec configuration

​Video device management

​Video encoding and external input

​Media stream control

​Audio file playback

​External audio streams

​Real-time messaging

​Audio frame callbacks

​Video frame callbacks

​AoqEngineDelegate callbacks

​AoqAudioFrameDelegate (@optional)

​AoqVideoFrameDelegate (@optional)

​Data types and enumerations

​AoqErrorCode

​AoqTrackType

​AoqConnectConfig

​AoqAudioPlaybackConfig

​Statistics types

​AoqStats

​AoqNetworkStats

​AoqAudioPublishStats

​AoqVideoPublishStats

​AoqAudioSubscribeStats

​AoqVideoSubscribeStats

​AoqDataMsgPublishStats / AoqDataMsgSubscribeStats

​Key differences from the Android SDK

API index

Engine lifecycle

Audio device management

Audio codec configuration

Video device management

Video encoding and external input

Media stream control

Audio file playback

External audio streams

Real-time messaging

Audio frame callbacks

Video frame callbacks

AoqEngineDelegate callbacks

API details

Engine lifecycle

createEngine:delegate:

destroy

getVersion

connect:

disconnect

Audio device management

Audio codec configuration

Video device management

Video encoding and external input

Media stream control

Audio file playback

External audio streams

Real-time messaging

Audio frame callbacks

Video frame callbacks

AoqEngineDelegate callbacks

AoqAudioFrameDelegate (@optional)

AoqVideoFrameDelegate (@optional)

Data types and enumerations

AoqErrorCode

AoqTrackType

AoqConnectConfig

AoqAudioPlaybackConfig

Statistics types

AoqStats

AoqNetworkStats

AoqAudioPublishStats

AoqVideoPublishStats

AoqAudioSubscribeStats

AoqVideoSubscribeStats

AoqDataMsgPublishStats / AoqDataMsgSubscribeStats

Key differences from the Android SDK