[Roman Herasymenko] New Android Camera API

Presentation from GDG DevFest - the biggest Google related event in Ukraine. October 24-25, Lviv. Learn more at http://devfest.gdg.org.ua/

Transcript

1. Android L - Camera2 APIs Roman Herasymenko Android/Java developer
2. #dfua Agenda - Pre-L camera API - Camera2 APIs
3. Pre-L camera API
4. #dfua Pre-L camera API - Limited access to streaming image data - Limited information about camera state - No manual camera control - Designed for ‘Point and shoot’
5. #dfua
6. Camera2 APIs
7. #dfua Camera2 APIs android.hardware.camera2 CameraManager, CameraDevice, CaptureSession, CaptureRequest CaptureResult
8. #dfua
9. #dfua
10. #dfua CameraManager New system service Provides interface for iterating, listing and connecting to CameraDevices
11. #dfua Opening the camera CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); manager.openCamera("0", new StateListener(){ @Override public void onOpened(CameraDevice device){ mCameraDevice = device; ... } ... }, null);
12. #dfua TextureView, MediaRecorder, MediaCodec, ImageReader, RenderScriptAllocation Types of Surfaces
13. #dfua Creating surfaces CameraCharacteristics chars = (mCameraManager).getCameraCharacteristics("0"); StreamConfigurationMap configs = chars.get(CameraCharacteristics. SCALER_STREAM_CONFIGURATION_MAP); Size [] sizes = configs.getOutputSizes(ImageFormat.JPEG); ImageReader mImageReader = ImageReader.newInstance(sizes[0].getWidth(), sizes[0]. getHeight(), ImageFormat.JPEG, 2); Surface jpegCapture = mImageReader.getSurface();
14. #dfua Creating a CaptureSession List<Surface> surfaces = new ArrayList<Surface>(); surfaces.add(previewSurface); surfaces.add(jpegCaptureSurface); mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession. StateCallback() { @Override public void onConfigured(CameraCaptureSession session) { .. } }, null);
15. #dfua TEMPLATE_PREVIEW TEMPLATE_RECORD TEMPLATE_STILL_CAPTURE TEMPLATE_VIDEO_SNAPSHOT CaptureRequest
16. #dfua Building requests previewRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice. TEMPLATE_PREVIEW); previewRequestBuilder.addTarget(previewSurface); captureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice. TEMPLATE_STILL_CAPTURE); captureRequestBuilder.addTarget(jpegCaptureSurface); captureRequest = captureRequestBuilder.build(); previewRequest = previewRequestBuilder.build();
17. #dfua capture setRepeatingRequest captureBurst setRepeatingBurst Types of Requests
18. #dfua Setting up a Builder Builder builder = mCameraDevice.createCaptureRequest(CameraDevice. TEMPLATE_STILL_CAPTURE); builder.addTarget(jpegCaptureSurface); builder.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest. CONTROL_AWB_MODE_INCANDESCENT); builder.set(CaptureRequest.CONTROL_EFFECT_MODE, CameraMetadata. CONTROL_EFFECT_MODE_SEPIA); builder.set(CaptureRequest.FLASH_MODE, CaptureRequest.FLASH_MODE_SINGLE);
19. #dfua CONTROL_AF_TRIGGER CONTROL_AE_PRECAPTURE_TRIGGER Focus and Exposure
20. #dfua Submitting request mCameraCaptureSession.capture(request, new CaptureListener() { @Override public void onCaptureStarted(CameraCaptureSession session, CaptureRequest request, long timestamp) { ... } @Override public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) { ... } }, null);
21. Thank you google.com/+RomanGerasimenko github.com/Aenterhy g+ github