IssueTracker

CAMERAX VERSION: 1.3.3
ANDROID OS BUILD NUMBER: AP1A.240505.005
DEVICES TESTED: Pixel 7a and Samsung S23FE

I'm using Camera2Interop to manually set all image capture settings, i.e. exposure/iso/wb/focus in the ImageAnalysis use case. In the code included below I've set the LENS_FOCUS_DISTANCE to 0.1 and then look at the reported focus value in the capture result.  In the Pixel 7a the values are different.  The included code produces this logcat output on the Pixel 7a:

2024-05-26 13:36:04.065  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.122  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  false  0.089209  733210577061211
2024-05-26 13:36:04.154  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 0  timestamp 733210577061211
2024-05-26 13:36:04.266  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.340  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  false  0.089209  733210777951266
2024-05-26 13:36:04.351  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 1  timestamp 733210777951266
2024-05-26 13:36:04.367  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.438  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  false  0.089209  733210878397157
2024-05-26 13:36:04.447  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 2  timestamp 733210878397157
2024-05-26 13:36:04.467  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.535  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733210978842472
2024-05-26 13:36:04.544  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 3  timestamp 733210978842472
2024-05-26 13:36:04.568  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.636  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211079287787
2024-05-26 13:36:04.649  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 4  timestamp 733211079287787
2024-05-26 13:36:04.668  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.737  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211179733102
2024-05-26 13:36:04.744  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 5  timestamp 733211179733102
2024-05-26 13:36:04.768  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.845  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211280178417
2024-05-26 13:36:04.863  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 6  timestamp 733211280178417
2024-05-26 13:36:04.871  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.960  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211380623732
2024-05-26 13:36:04.972  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:04.990  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 7  timestamp 733211380623732
2024-05-26 13:36:05.061  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211481069047
2024-05-26 13:36:05.071  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.079  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 8  timestamp 733211481069047
2024-05-26 13:36:05.159  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211581514362
2024-05-26 13:36:05.173  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.196  8889-8889  debug_imageanalysis     com.example.testimageanalysis        D  image 9  timestamp 733211581514362
2024-05-26 13:36:05.264  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211681959676
2024-05-26 13:36:05.273  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.362  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211782404991
2024-05-26 13:36:05.375  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.467  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211882850306
2024-05-26 13:36:05.476  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.568  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733211983295621
2024-05-26 13:36:05.574  8889-8953  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureStarted():  
2024-05-26 13:36:05.685  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureCompleted():  true  0.089209  733212083740936
2024-05-26 13:36:05.685  8889-8942  debug_imageanalysis     com.example.testimageanalysis        D  onCaptureSequenceCompleted():  

The focus distance is set to 0.1 via Camera2Interop but once the lens has finished moving the value is still reported as 0.089209.  Other focus distance settings have the same behavior.  

On the Samsung S23FE I don't see this behavior *except* when setting the focus distance to 0.0.  In this case the S23FE returns a non-zero value for the focus distance in the capture result and it appears the focus remains at the setting last used in any other camera app.

I created a simple app and added the following code in the main activity to test this issue:

            cameraProviderFuture.addListener( {
                val cameraProvider = cameraProviderFuture.get()

                val resolutionSelector = ResolutionSelector.Builder()
                    .setResolutionStrategy(ResolutionStrategy.HIGHEST_AVAILABLE_STRATEGY)
                    .build()

                val imageAnalysisBuilder = ImageAnalysis.Builder()
                    .setOutputImageFormat(ImageAnalysis.OUTPUT_IMAGE_FORMAT_RGBA_8888)
                    .setResolutionSelector(resolutionSelector)

                val camera2InterOp = Camera2Interop.Extender(imageAnalysisBuilder)

                camera2InterOp.setCaptureRequestOption(CaptureRequest.CONTROL_AWB_MODE,
                    CameraMetadata.CONTROL_AWB_MODE_DAYLIGHT)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.CONTROL_AE_MODE,
                    CameraMetadata.CONTROL_AE_MODE_OFF)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.CONTROL_AF_MODE,
                    CameraMetadata.CONTROL_AF_MODE_OFF)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.FLASH_MODE,
                    CameraMetadata.FLASH_MODE_OFF)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.SENSOR_SENSITIVITY, 200)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.SENSOR_EXPOSURE_TIME, 100_000_000L)
                camera2InterOp.setCaptureRequestOption(CaptureRequest.LENS_FOCUS_DISTANCE, 0.1f)
                camera2InterOp.setSessionCaptureCallback(object: CameraCaptureSession.CaptureCallback() {
                    override fun onCaptureFailed(session: CameraCaptureSession, request: CaptureRequest,
                                                 failure: CaptureFailure) {
                        Log.d("debug_imageanalysis","onCaptureFailed():  ")
                        super.onCaptureFailed(session, request, failure)
                    }
                    override fun onCaptureSequenceCompleted(session: CameraCaptureSession, sequenceId: Int,
                                                            frameNumber: Long) {
                        Log.d("debug_imageanalysis","onCaptureSequenceCompleted():  ")
                        super.onCaptureSequenceCompleted(session, sequenceId, frameNumber)
                    }
                    override fun onCaptureStarted(session: CameraCaptureSession, request: CaptureRequest,
                                                  timestamp: Long, frameNumber: Long) {
                        Log.d("debug_imageanalysis","onCaptureStarted():  ")
                        super.onCaptureStarted(session, request, timestamp, frameNumber)
                    }
                    override fun onCaptureCompleted(session: CameraCaptureSession, request: CaptureRequest,
                                                    result: TotalCaptureResult) {
                        val lens_state = result.get(CaptureResult.LENS_STATE)
                        val focus_dist = result.get(CaptureResult.LENS_FOCUS_DISTANCE)
                        val timestamp = result.get(CaptureResult.SENSOR_TIMESTAMP)
                        Log.d("debug_imageanalysis","onCaptureCompleted():  " +
                                "${lens_state==CaptureResult.LENS_STATE_STATIONARY}  $focus_dist  $timestamp")
                        super.onCaptureCompleted(session, request, result)
                    }
                })

                var kimage = 0
                val imageAnalysis = imageAnalysisBuilder.build().apply {
                    setAnalyzer( ContextCompat.getMainExecutor(baseContext), ImageAnalysis.Analyzer { image ->
                        val timestamp = image.imageInfo.timestamp
                        Log.d("debug_imageanalysis","image $kimage  timestamp $timestamp")
                        image.close()
                        if( ++kimage == 10 ) clearAnalyzer() // stop streaming images to the image analyzer
                    })
                }
                val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA

                cameraProvider.unbindAll()
                cameraProvider.bindToLifecycle(this as LifecycleOwner, cameraSelector, imageAnalysis)

            }, ContextCompat.getMainExecutor(this))