List of usage examples for android.hardware.camera2 CaptureRequest CONTROL_AWB_REGIONS
Key CONTROL_AWB_REGIONS
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List of metering areas to use for auto-white-balance illuminant estimation.
Not available if CameraCharacteristics#CONTROL_MAX_REGIONS_AWB android.control.maxRegionsAwb is 0.
From source file:com.android.camera2.its.ItsService.java
private void do3A(JSONObject params) throws ItsException { try {//from w ww .jav a 2 s . c o m // Start a 3A action, and wait for it to converge. // Get the converged values for each "A", and package into JSON result for caller. // 3A happens on full-res frames. Size sizes[] = ItsUtils.getYuvOutputSizes(mCameraCharacteristics); int widths[] = new int[1]; int heights[] = new int[1]; int formats[] = new int[1]; widths[0] = sizes[0].getWidth(); heights[0] = sizes[0].getHeight(); formats[0] = ImageFormat.YUV_420_888; int width = widths[0]; int height = heights[0]; prepareCaptureReader(widths, heights, formats, 1); List<Surface> outputSurfaces = new ArrayList<Surface>(1); outputSurfaces.add(mCaptureReaders[0].getSurface()); BlockingSessionCallback sessionListener = new BlockingSessionCallback(); mCamera.createCaptureSession(outputSurfaces, sessionListener, mCameraHandler); mSession = sessionListener.waitAndGetSession(TIMEOUT_IDLE_MS); // Add a listener that just recycles buffers; they aren't saved anywhere. ImageReader.OnImageAvailableListener readerListener = createAvailableListenerDropper(mCaptureCallback); mCaptureReaders[0].setOnImageAvailableListener(readerListener, mSaveHandlers[0]); // Get the user-specified regions for AE, AWB, AF. // Note that the user specifies normalized [x,y,w,h], which is converted below // to an [x0,y0,x1,y1] region in sensor coords. The capture request region // also has a fifth "weight" element: [x0,y0,x1,y1,w]. MeteringRectangle[] regionAE = new MeteringRectangle[] { new MeteringRectangle(0, 0, width, height, 1) }; MeteringRectangle[] regionAF = new MeteringRectangle[] { new MeteringRectangle(0, 0, width, height, 1) }; MeteringRectangle[] regionAWB = new MeteringRectangle[] { new MeteringRectangle(0, 0, width, height, 1) }; if (params.has(REGION_KEY)) { JSONObject regions = params.getJSONObject(REGION_KEY); if (regions.has(REGION_AE_KEY)) { regionAE = ItsUtils.getJsonWeightedRectsFromArray(regions.getJSONArray(REGION_AE_KEY), true, width, height); } if (regions.has(REGION_AF_KEY)) { regionAF = ItsUtils.getJsonWeightedRectsFromArray(regions.getJSONArray(REGION_AF_KEY), true, width, height); } if (regions.has(REGION_AWB_KEY)) { regionAWB = ItsUtils.getJsonWeightedRectsFromArray(regions.getJSONArray(REGION_AWB_KEY), true, width, height); } } // If AE or AWB lock is specified, then the 3A will converge first and then lock these // values, waiting until the HAL has reported that the lock was successful. mNeedsLockedAE = params.optBoolean(LOCK_AE_KEY, false); mNeedsLockedAWB = params.optBoolean(LOCK_AWB_KEY, false); // By default, AE and AF both get triggered, but the user can optionally override this. // Also, AF won't get triggered if the lens is fixed-focus. boolean doAE = true; boolean doAF = true; if (params.has(TRIGGER_KEY)) { JSONObject triggers = params.getJSONObject(TRIGGER_KEY); if (triggers.has(TRIGGER_AE_KEY)) { doAE = triggers.getBoolean(TRIGGER_AE_KEY); } if (triggers.has(TRIGGER_AF_KEY)) { doAF = triggers.getBoolean(TRIGGER_AF_KEY); } } if (doAF && mCameraCharacteristics.get(CameraCharacteristics.LENS_INFO_MINIMUM_FOCUS_DISTANCE) == 0) { // Send a dummy result back for the code that is waiting for this message to see // that AF has converged. Logt.i(TAG, "Ignoring request for AF on fixed-focus camera"); mSocketRunnableObj.sendResponse("afResult", "0.0"); doAF = false; } mInterlock3A.open(); mIssuedRequest3A = false; mConvergedAE = false; mConvergedAWB = false; mConvergedAF = false; mLockedAE = false; mLockedAWB = false; long tstart = System.currentTimeMillis(); boolean triggeredAE = false; boolean triggeredAF = false; Logt.i(TAG, String.format("Initiating 3A: AE:%d, AF:%d, AWB:1, AELOCK:%d, AWBLOCK:%d", doAE ? 1 : 0, doAF ? 1 : 0, mNeedsLockedAE ? 1 : 0, mNeedsLockedAWB ? 1 : 0)); // Keep issuing capture requests until 3A has converged. while (true) { // Block until can take the next 3A frame. Only want one outstanding frame // at a time, to simplify the logic here. if (!mInterlock3A.block(TIMEOUT_3A * 1000) || System.currentTimeMillis() - tstart > TIMEOUT_3A * 1000) { throw new ItsException("3A failed to converge (timeout)"); } mInterlock3A.close(); // If not converged yet, issue another capture request. if ((doAE && (!triggeredAE || !mConvergedAE)) || !mConvergedAWB || (doAF && (!triggeredAF || !mConvergedAF)) || (doAE && mNeedsLockedAE && !mLockedAE) || (mNeedsLockedAWB && !mLockedAWB)) { // Baseline capture request for 3A. CaptureRequest.Builder req = mCamera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); req.set(CaptureRequest.FLASH_MODE, CaptureRequest.FLASH_MODE_OFF); req.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO); req.set(CaptureRequest.CONTROL_CAPTURE_INTENT, CaptureRequest.CONTROL_CAPTURE_INTENT_PREVIEW); req.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON); req.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 0); req.set(CaptureRequest.CONTROL_AE_LOCK, false); req.set(CaptureRequest.CONTROL_AE_REGIONS, regionAE); req.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_AUTO); req.set(CaptureRequest.CONTROL_AF_REGIONS, regionAF); req.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest.CONTROL_AWB_MODE_AUTO); req.set(CaptureRequest.CONTROL_AWB_LOCK, false); req.set(CaptureRequest.CONTROL_AWB_REGIONS, regionAWB); if (mConvergedAE && mNeedsLockedAE) { req.set(CaptureRequest.CONTROL_AE_LOCK, true); } if (mConvergedAWB && mNeedsLockedAWB) { req.set(CaptureRequest.CONTROL_AWB_LOCK, true); } // Trigger AE first. if (doAE && !triggeredAE) { Logt.i(TAG, "Triggering AE"); req.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START); triggeredAE = true; } // After AE has converged, trigger AF. if (doAF && !triggeredAF && (!doAE || (triggeredAE && mConvergedAE))) { Logt.i(TAG, "Triggering AF"); req.set(CaptureRequest.CONTROL_AF_TRIGGER, CaptureRequest.CONTROL_AF_TRIGGER_START); triggeredAF = true; } req.addTarget(mCaptureReaders[0].getSurface()); mIssuedRequest3A = true; mSession.capture(req.build(), mCaptureResultListener, mResultHandler); } else { mSocketRunnableObj.sendResponse("3aConverged", ""); Logt.i(TAG, "3A converged"); break; } } } catch (android.hardware.camera2.CameraAccessException e) { throw new ItsException("Access error: ", e); } catch (org.json.JSONException e) { throw new ItsException("JSON error: ", e); } finally { mSocketRunnableObj.sendResponse("3aDone", ""); } }