Camera2 API mapping

This page summarizes how Camera2 APIs replace core Extended View System (EVS) APIs.

IEvsEnumerator API

IEvsEnumerator	Camera2 NDK API	Camera2 Java API
openCamera EVS openCamera combined the open and stream config; Camera2 separates them.	ACameraManager_openCamera and then ACameraDevice_createCaptureSession with AImageReader and then ACameraDevice_createCaptureRequest	CameraManager.openCamera and then CameraDevice.createCaptureSession (with ImageReader or other Surface) and then CameraDevice.createCaptureRequest
closeCamera	ACameraDevice_close	CameraDevice.close
getCameraList	ACameraManager_getCameraIdList and then ACameraManager_getCameraCharacteristics for details	CameraManager.getCameraIdList and then CameraManager.getCameraCharacteristics for details
getStreamList	ACameraManager_getCameraCharacteristics, read ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS tag	CameraManager.getCameraCharacteristics, get CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP
registerStatusCallback	ACameraManager_registerAvailabilityCallback with ACameraManager_AvailabilityListener	CameraManager.registerAvailabilityCallback with CameraManager.AvailabilityCallback
isHardware	N/A	N/A
getDisplayIdList Deprecated. Use DisplayManager.getDisplays	N/A	N/A
getDisplayState Deprecated. Use Display.getState	N/A	N/A
getDisplayStateById Deprecated. Use DisplayManager.getDisplay and then Display.getState	N/A	N/A
openDisplay Deprecated. Use WindowManager.addView on a specific Display	N/A	N/A
closeDisplay Deprecated. Use WindowManager.removeView	N/A	N/A
openUltrasonicsArray Deprecated. Use VHAL properties.	N/A	N/A
getUltrasonicsArrayList Deprecated. Use VHAL properties.	N/A	N/A
closeUltrasonicsArray Deprecated. Use VHAL properties.	N/A	N/A

IEvsCamera

IEvsCamera	Camera2 NDK API	Camera2 Java API
getCameraInfo	ACameraManager_getCameraCharacteristics	CameraManager.getCameraCharacteristics
getPhysicalCameraInfo For logical cameras, check getPhysicalCameraIds	ACameraManager_getCameraCharacteristics	CameraManager.getCameraCharacteristics
setMaxFramesInFlight Can't be changed dynamically in Camera2; set when you create ImageReader	Set in AImageReader_new or AImageReader_newWithUsage	Set in ImageReader.newInstance(width, height, format, maxImages)
startVideoStream	ACameraCaptureSession_setRepeatingRequestV2	CameraCaptureSession.setSingleRepeatingRequest
stopVideoStream	ACameraCaptureSession_stopRepeating	CameraCaptureSession.stopRepeating
pauseVideoStream No direct equivalent. Use stopRepeatingRequest	ACameraCaptureSession_stopRepeating	CameraCaptureSession.stopRepeating
resumeVideoStream No direct equivalent; use setSingleRepeatingRequest	ACameraCaptureSession_setRepeatingRequestV2	CameraCaptureSession.setSingleRepeatingRequest
doneWithFrame Releases buffer back to queue	AImage_delete	Image.close
importExternalBuffers Buffer management is handled by Surfaces. To learn more, see CameraCaptureSession.prepare	N/A	N/A
getParameterList	ACameraMetadata_getAllTags	CameraCharacteristics.getKeys
getIntParameter	ACaptureRequest_getConstEntry	CaptureRequest.get(key)
getIntParameterRange Ranges are part of CameraCharacteristics	ACameraMetadata_getConstEntry	CameraCharacteristics.get(key) (CONTROL_AE_COMPENSATION_RANGE), and similar
setIntParameter	ACaptureRequest_setEntry_i32, _u8, and similar	CaptureRequest.Builder.set(key, value)
getExtendedInfo Use vendor tags to implement custom data.	Use vendor tags on ACaptureRequest or ACameraMetadata	Use vendor tags on CaptureRequest or CameraCharacteristics
setExtendedInfo Use vendor tags to implement custom data.	Use vendor tags on ACaptureRequest	Use vendor tags on CaptureRequest.Builder
setPrimaryClient Deprecated. Primary client status is priority-based in the Camera2 shared mode.	N/A	N/A
unsetPrimaryClient Deprecated.	N/A	N/A
forcePrimaryClient Deprecated.	N/A	N/A

IEvsCameraStream

IEvsCameraStream	Camera2 NDK API	Camera2 Java API
deliverFrame Callback to receive new frames. Acquire the image with ImageReader.acquireLatestImage or ImageReader.acquireNextImage	onImageAvailable of AImageReader_ImageListener	onImageAvailable of ImageReader.OnImageAvailableListener
notify Callbacks for capture events (started, progress, completion, failure) and CameraDevice.StateCallback for device events (error, disconnect).	ACameraCaptureSession_captureCallbacksV2	CameraCaptureSession.CaptureCallback

IEvsDisplay API

All APIs in the IEvsDisplay interface are deprecated. OEMs should use standard Android classes:

• android.hardware.display.DisplayManager
• android.view.Display
• android.view.WindowManager