Google I/O Extended Suwon 2019 Tech Talk - Camera X

Google I/O Extended Suwon Tech Talk - Camera X (성대현 님)

Transcript

2. Camera1 API Camera Open Camera Release Start Preview Take Picture Start Recording Stop Preview HAL1 (Hardware Abstraction Layer)
3. Camera2 API Capture Request Camera Metadata Camera Manager Camera Result Camera Device Capture Session HAL3 (Hardware Abstraction Layer) Open
4. “ ” But, Camera2 API는 사용이 쉽지 않다. Camera를 Per frame으로 Control 가능 Zero Shutter Lag Burst Shot Raw Capture etc.
5. “ ” Why 사용이 어렵다 Camera1 도 잘 동작한다 여전히 Camera1 API를 사용 But 최적화된 동작을 보장할 수 없다 ETC..
6. Camera Architecture Camera API Backwards compatible Consistent Behavior Optimal Performance Easy to Use 복잡한 Camera Architecture
7. CameraX API 21 + Alpha
8. Why CameraX Backwards Compatible to L Consistent Behavior Stability Optimal Performance Camera X uses Camera2 API Camera1 Via Camera Legacy
9. Why CameraX Camera App Camera 2 API Device HAL Camera App Camera 2 API Device HAL Camera X Hide
10. Why CameraX Preview Image Analysis Image Capture Use Case 기반의 쉬운 API 제공 Lifecycle Aware Camera Control
11. Why CameraX Vendor Extension Auto +
12. CameraX benefits Reduced Device Specific Testing 75% reduction in lines of code Easier to read code Smaller apk size Easy to use Managing lifecycles No need for a separate camera thread
13. CameraX Architecture Core (Usecase, Config) Camera2 Extension CameraView
14. CameraX Usecase Preview Image Capture Image Analysis Video Capture Config +
15. CameraX Code What to do Where to send Output When to start & stop Use case
16. CameraX Code – Preview PreviewConfig config = new PreviewConfig.Builder().build(); Preview preview = new Preview(config); preview.setOnPreviewOutputUpdateListener( new Preview.OnPreviewOutputUpdateListener() { @Override public void onUpdated(Preview.PreviewOutput previewOutput) { // Your code here. For example, use previewOutput.getSurfaceTexture() // and post to a GL renderer. }); }); CameraX.bindToLifecycle((LifecycleOwner) this, preview);
17. CameraX Code – Image Capture ImageCaptureConfig config = new ImageCaptureConfig.Builder() .setTargetRotation(getWindowManager().getDefaultDisplay().getRotation()) .build(); ImagesCapture imageCapture = new ImageCapture(config); CameraX.bindToLifecycle((LifecycleOwner) this, imageCapture, imageAnalysis, preview);
18. CameraX Code – Image Capture public void onClick() { File file = new File(...); imageCapture.takePicture(file, new ImageCapture.OnImageSavedListener() { @Override public void onImageSaved(File file) { } @Override public void onError( ImageCapture.UseCaseError useCaseError, String message, Throwable cause) { }
19. CameraX Code – Extension ImageCaptureConfig.Builder builder = new ImageCaptureConfig.Builder(); // Create a Extender object which can be used to apply extension // configurations. BokehImageCaptureExtender bokehImageCapture = new BokehImageCaptureExtender(builder); // Query if extension is available (optional). if (bokehImageCapture.isExtensionAvailable()) { // Enable the extension if available. bokehImageCapture.enableExtension(); } // Finish constructing configuration with the same flow as when not using // extensions. ImageCaptureConfig config = builder.build(); ImageCapture useCase = new ImageCapture(config); CameraX.bindToLifecycle((LifecycleOwner)this, useCase); Bokeh Extender
20. 참조 Android Jetpack: Understand the CameraX Camera-Support Library (Google I/O'19) https://developer.android.com/training/camerax
21. 감사합니다.