14. API Reference

This section provides detailed description of ARGear classes.

14.1 ARGSession

ARGSession class stores statuses of an application and provides corresponding functions based on the statuses.

14.1.1 Overview

Method	Description
ARGSession(Context context, ARGConfig config)	Create ARGSession according to ARGConfig.
ARGSession(Context context, ARGConfig config, Set<ARGInferenceConfig.Feature> inference)	Create ARGSession according to ARGConfig and ARGInferenceConfig.Feature.
auth	Return ARGAuth object.
contents	Return ARGContents object.
setCameraConfig	Set camera configuration information.
applyAdditionalFaceInfo	Send additional information for face detection.
feedRawData	Update Preview Frame data from camera.
feedTextureId	Feed texture ID of camera
drawFrame	Render fed frames from camera along with ARGear contents.
resume	Start or resume ARGSession.
pause	Pause ARGSession.
destroy	Destroy ARGSession.
setFeatureInference	Set or update ARGInferenceConfig.Feature.
setDebugInference	Enable or disable ARGInferenceConfig.Debug.

14.1.2 Details

public ARGSession(Context context, ARGConfig config)

Create ARGSession according to ARGConfig. ARGConfig contains configuration information for ARGSession and must be provided to create ARGSession. Corresponding information must be set to the variables below. - public String apiUrl; - public String apiKey; - public String secretKey; - public String authKey; Parameters Context context : Application Context ARGConfig config : Configuration Information for ARGSession Returns An Instance of ARGSession

public ARGSession(Context context, ARGConfig config, Set<ARGInferenceConfig.Feature> inference)

Use ARGConfig and ARGInferenceConfig.Feature to create ARGSession. ARGConfig contains configuration information for ARGSession and must be provided to create ARGSession. Corresponding information must be set to the variables below. public String apiUrl; public String apiKey; public String secretKey; public String authKey; ARGInferenceConfig.Feature is a required parameter and can be obtained from ARGFrame. Types of feature inferences are declared as follows. public enum Feature { FACE_LOW_TRACKING, // Machine Learning based TRACKING FACE_HIGH_TRACKING, // Deep Learning based TRACKING (Low polygon) FACE_MESH_TRACKING, // Deep Learning based TRACKING (High polygon) // FACE_BLEND_SHAPES, SEGMENTATION_HALF, // SEGMENTATION_FULL, // HAND_TRACKING, // HAND_LANDMARK_2D, // HAND_LANDMARK_3D, // BODY_TRACKING, // BODY_POSE_2D, // BODY_POSE_3D } Parameters Context context : Application Context ARGConfig config : Configuration Information for ARGSession Set<ARGInferenceConfig.Feature> inference : Type of Feature Inference Returns An Instance of ARGSession

public ARGAuth auth()
Return An Instance of ARGAuth. (Reference : 12.2 ARGAuth) Returns An Instance of ARGAuth

public ARGContents contents()
Return An Instance of ARGContents (Reference : 12.6 ARGContents) Returns An Instance of ARGContents

public void setCameraConfig(ARGCameraConfig config)
Set Camera Configuration Information. ARGCameraConfig declares variables as written below. public int previewWidth; public int previewHeight; public float verticalFov; public float horizontalFov; public int orientation; public boolean isFrontFacing; public float fps; Parameters ARGCameraConfig config : An Instance of Camera Configuration

public void applyAdditionalFaceInfo(List faceVerticesList, List poseMatrixList, float [] projectionMatrix, float [] viewMatrix
Send additional information for face detection. Parameters faceVerticesList : face vertices poseMatrixList : pose matrix projectionMatrix : projection matrix viewMatrix : view matrix

public void feedRawData(byte[] data)
For Camera API 1 Update Preview Frame Data from Camera Device. Parameters byte[] data : Raw Frame Data from Camera

public void feedRawData(Image data)
For Camera API 2 Update Preview Frame Data from Camera Device. Parameters Image data : Image Data from Camera

public void feedTexture(int textureId, Size textureSize)
Feed texture ID of a camera Parameters textureId : texture ID of a camera textureSize : texture size

public ARGFrame drawFrame(GL10 gl, ARGFrame.Ratio ratio, int viewWidth, int viewHeight)

Render fed frames from camera along with ARGear contents. The function must be called in gl thread environment. Possible screen ratios are described below. public enum Ratio { RATIO_FULL(3), RATIO_4_3(2), RATIO_1_1(1); public final int code; Ratio(int code) { this.code = code; } } Parameters GL10 gl : gl interface ARGFrame.Ratio ratio : Screen Ratio int viewWidth : Width of View int viewHeight : Height of View

public void resume()
Start or Resume ARGSession.

public void pause()
Pause ARGSession.

public void destroy()
Destroy ARGSession.

public void setFeatureInference(Set<ARGInferenceConfig.Feature> config)

Set or update ARGInferenceConfig.Feature. From ARGFrame, configured information can be retrieved. Types of feature inferences are declared as follows. public enum Feature { FACE_LOW_TRACKING, // Machine Learning based TRACKING FACE_HIGH_TRACKING, // Deep Learning based TRACKING (Low polygon) // FACE_MESH_TRACKING, // Deep Learning based TRACKING (High polygon) // FACE_BLEND_SHAPES, SEGMENTATION_HALF, // SEGMENTATION_FULL, // HAND_TRACKING, // HAND_LANDMARK_2D, // HAND_LANDMARK_3D, // BODY_TRACKING, // BODY_POSE_2D, // BODY_POSE_3D } Parameters Set<ARGInferenceConfig.Feature> config : feature inference configuration values

public void setDebugInference(Set<ARGInferenceConfig.Debug> config)
Enable or Disable ARGInferenceConfig.Debug. Types of feature inferences are declared as below. public enum Debug { NONE(0), FACE_RECT_HW(1 << 0), FACE_RECT_SW(1 << 3), FACE_LANDMARK(1 << 4), FACE_LANDMARK_EXTEND(1 << 5), FACE_AXIES(1 << 6); public final int code; Debug(int code) { this.code = code; } } Parameters Set<ARGInferenceConfig.Debug> config : debug inference set values

14.2 ARGAuth

ARGAuth provides validity check and signed download URL creation functions.

14.2.1 Overview

Method	Description
isValid	Check whether Authentication is valid.
requestSignedUrl	Convert download URL into signed download URL.

14.2.2 Details

public boolean isValid()
Return boolean value to check whether Authentication is valid or not. If Authentication is invalid, ARGear will not work. Returns true : valid fale : invalid

public void requestSignedUrl(final String url, final String itemTitle, final String itemType, final ARGAuth.Callback callback)

Convert download url into signed download url. After signed url request is sent, the result can be obtained by running ARGAuth.Callback function. ARGAuth.Callback is defined as below. public interface Callback { void onSuccess(String url); void onError(Throwable e); } When ARGAuth.Callback succeeds, it passes signed download url to OnSuccess method as its parameter. When it does not, it passes SignedUrlGenerationException or NetworkException to OnError method as its parameters. Parameters String url : download url String itemTitle : title of an item final String itemType : type of an item ARGAuth.Callback callback : result of callback

14.3 ARGFrame

ARGFrame contains both the fed frames from the camera and the rendered ARGear Contents. ARGFrame can be obtained as a result of calling the drawFrame function in ARGSession.

14.3.1 Overview

Method	Description
getTextureId	Return rendered texture id from ARGear.
getRawData	Return rendered result from ARGear in byte array type.
getItemTriggerFlag	Return trigger flag value of ARGear Contents in ARGear.
getFaces	Return the list of ARGFace objects.
segmentation	Return ARGSegmentation object.

14.3.2 Details

public int getTextureId()
Return rendered texture id in ARGear. Returns texture id

public ByteBuffer getRawData(int degree, boolean flipX, boolean flipY)
Return rendered result from ARGear in byte array type. This method should be called in gl thread environment. Returns degree : rotation degree (0, 90, 180, 360) flipX : flip in X axis flipY : flip in Y axis texture id

public int getItemTriggerFlag()

Return trigger flag values of ARGear Contents in ARGear. When a type of trigger flag action is performed by a user, it triggers a corresponding event. Returns TRIGGER_MOUTH_FLAG = (1 << 0) : Trigger an event on mouth opening action TRIGGER_HEAD_FLAG = (1 << 1) : Trigger an event on left to right head movement action TRIGGER_DELAY_FLAG = (1 << 2) : Trigger an event after designated delayed time TRIGGER_BLINK_EYES_FLAG = (1 << 3) : Trigger an event on blink action

public @Nullable List<ARGFace> getFaces()
Return a list of ARGFace objects. (Reference : 12.4 ARGFace) Returns A list of object in ARGFace

public @Nullable ARGSegmentation segmentation()
Return ARGSegmentation object. (Reference : 12.5 Segmentation) Returns ARGSegmentation object

14.4 ARGFace

ARGFace contains face tracking and detection related information.

14.4.1 Overview

Method	Description
getLandmark	Return 68 point 2d landmark.
getExtendLandmark	Return 83 point 2d landmark.
getRotationMatrix	Return rotation matrix.
getTranslationVector	Return translation vector.
getTriggerInfo	Return trigger.
isValid	Return a boolean value by whether face is detected or not.

14.4.2 Details

public float [] getLandmark()
Return 68 point 2d landmark. The shape of landmark array is 68 * 2. It contains 68 x and y coordinates in the order of [0] : x1, [1] : y1, [2] : x2, [3] : y2, …, [66] : x68, [67] : y68. Returns float[68 *2] : 68 point 2d landmark array

public float [] getExtendLandmark()
Return 83 point 2d landmark. The shape of landmark array is 83 * 2. It contains 83 x and y coordinates in the order of [0] : x1, [1] : y1, [2] : x2, [3] : y2, …, [82] : x83, [82] : y83. Returns float[83 *2] : 83 point 2d landmark array

public double [] getRotationMatrix()
Return a rotation matrix. Returns double[9] : 3x3 Rotation Matrix |[0],[1],[2]| |[3],[4],[5]| |[6],[7],[8]|

public double [] getTranslationVector()
Return a translation vector array. Returns double[3] : translation vector array [0] : x [1] : y [2] : z

public int [] getTriggerInfo()
Return trigger related information. Parameters Context context : Application Context String apiKey : API Key String secretKey : Secret Key Returns int[3] : trigger information [0] : Left Eye Open (1: opened 0:closed) [1] : Right Eye Open (1: opened 0:closed) [2] : MOUTH(0:closed ~ 100:opened)

public boolean isValid()
Check whether face is detected or not. Returns true : detected false : not detected

14.5 ARGSegmentation

ARGSegmentation contains the result of segmentation.

14.5.1 Overview

Method	Description
getTextureId	Return texture id of segmentation result.

14.5.2 Details

public int getTextureId()
Return texture id of segmentation result. Returns int : texture id of segmentation result

14.6 ARGContents

Apply ARGear contents, beauty, or bulge effects.

14.6.1 Overview

Method	Description
setItem	Set ARGear contents.
setBeauty	Set face beautification effect.
setBulge	Set face fun bulge effect.
setFilterOption	Set a type of filter option (blur, vignetting).
setFilterLevel	Manipulate level of a filter effect.
clear	Clear applied contents.

14.6.2 Details

public void setItem(Type type, String path, String id, ARGContents.Callback callback)

Set ARGear contents. Two types of contents (ARGContents.Type.ARGItem, ARGContents.Type.FilterItem) can be set. The result callback interface is defined as below. public interface Callback { void onSuccess(); void onError(Throwable e); } For the OnError parameter, InvalidContentsException comes in. Parameters Type type : A type of content to be applied String path : Path of downloaded contents String id : uuid ARGContents.Callback callback : Result callback

public void setBeauty(float [] values)

Set a face beautification effect. The function takes a float array as its input, each element of which indicates a level of face beautification effect of its type. A sample input of a float array is shown below. public float[] beautyValues = { 10, //VLINE 90, //ACE_SLIM 55, //JAW -50, //CHIN 5, //EYE -10, //EYE_GAP 0, //NOSE_LINE 35, //NOSE_SIDE 30, //NOSE_LENGTH -35, //MOUTH_SIZE 0, //EYE_BACK 0, //EYE_CORNER 0, //LIP_SIZE 50, //SKIN 0, //DARK_CIRCLE 0, //MOUTH_WRINKLE }; For the range of the float array, please refer to 9.2 Apply Face Beautification Effect. Parameters float[ ] values : An array of level of face beautification effects

public void setBulge(BulgeType type)
Apply a face fun bulge effect. The function provides 6 types of face fun bulge effects as shown below. public enum BulgeType { NONE(-1), FUN1(1), FUN2(2), FUN3(3), FUN4(4), FUN5(5), FUN6(6); public final int code; BulgeType(int code) { this.code = code; } } Parameters BulgeType type : a face fun bulge type

public void setFilterOption(FilterOption option, boolean flag)
Apply a type of filter (blur, vignetting). The function provides two types of options and its effect is applied only when a filter content is applied beforehand. public enum FilterOption { BLUR, VIGNETTING } Parameters FilterOption option : filter option boolean flag : Whether a filter is set or not (true : set, false : removed) Returns

public void setFilterLevel(int level)
The function manipulates a level of a filter effect between 0 and 100. The effect is applied when a filter content is applied beforehand. Parameters int level : A level of a filter effect (Range : 0 ~ 100)

public void clear(Type type)
Clear applied contents. Parameters Type type : A type of content to be removed (ARGItem, FilterItem, Beauty, Bulge)

14.7 ARGMedia

ARGMedia provides photo capture and video recording functions.

14.7.1 Overview

Method	Description
initRecorder	Configure video recording options.
startRecording	Start video recording.
stopRecording	Stop video recording.
updateFrame	Encode rendered texture.
isRecording	Check whether video recording is going on or not.
takePicture	Take a picture.

14.7.2 Details

public void initRecorder(String path, int width, int height, int bitrate, boolean videoOnly, boolean flipV, boolean flipH, Ratio ratio)

Configure video recording options. The function must be called before recording a video. Three different size of ratios are allowed for recording as shown below. public enum Ratio { RATIO_16_9(0), RATIO_4_3(1), RATIO_1_1(2); public final int code; Ratio(int code) { this.code = code; } } Parameters String path : Path to save a video int width : Width of camera preview int height : Height of camera preview int bitrate : bitrate boolean videoOnly : Check whether audio recording should be turned on boolean flipV : Check whether the recording should flip in vertical axis boolean flipH : Check whether the recording should flip in horizontal axis Ratio ratio : Ratio of recording a video

public void startRecording()
The function starts recording a video.

public void stopRecording()
The function stops recording a video. Once stopped, it stores the video in the path set in initRecorder function earlier.

public void updateFrame(int textureId)
The function encodes rendered texture. It must be called in a gl thread. Parameters int textureId : texture id rendered in ARGear (It can be obtained from getTextureId method in ARGFrame.)

public boolean isRecording()
Check whether video recording has been started or not. Returns true : Recording started. false : Recording stopped.

Public void takePicture(int textureId, String path, Ratio ratio)

Take a photo. The function provides three different ratios for photo capture as shown below. public enum Ratio { RATIO_16_9(0), RATIO_4_3(1), RATIO_1_1(2); public final int code; Ratio(int code) { this.code = code; } } This function must be called in a gl thread environment. Parameters int textureId : texture id rendered in ARGear (It can be obtained from getTextureId method in ARGFrame.) String path : Path to save a photo Ratio ratio : Size ratio of a photo