List of usage examples for android.hardware.camera2 CaptureResult CONTROL_AE_STATE
Key CONTROL_AE_STATE
To view the source code for android.hardware.camera2 CaptureResult CONTROL_AE_STATE.
Click Source Link
Current state of the auto-exposure (AE) algorithm.
Switching between or enabling AE modes ( CaptureRequest#CONTROL_AE_MODE android.control.aeMode ) always resets the AE state to INACTIVE.
From source file:com.obviousengine.android.focus.ZslFocusCamera.java
/** * Take a picture.// www . ja v a2 s . com */ @Override public void takePicture(final PhotoCaptureParameters params, final CaptureSession session) { params.checkSanity(); readyStateManager.setInput(ReadyStateRequirement.CAPTURE_NOT_IN_PROGRESS, false); boolean useZSL = ZSL_ENABLED; // We will only capture images from the zsl ring-buffer which satisfy // this constraint. ArrayList<ImageCaptureManager.CapturedImageConstraint> zslConstraints = new ArrayList<>(); zslConstraints.add(new ImageCaptureManager.CapturedImageConstraint() { @Override public boolean satisfiesConstraint(TotalCaptureResult captureResult) { Long timestamp = captureResult.get(CaptureResult.SENSOR_TIMESTAMP); Integer lensState = captureResult.get(CaptureResult.LENS_STATE); Integer flashState = captureResult.get(CaptureResult.FLASH_STATE); Integer flashMode = captureResult.get(CaptureResult.FLASH_MODE); Integer aeState = captureResult.get(CaptureResult.CONTROL_AE_STATE); Integer afState = captureResult.get(CaptureResult.CONTROL_AF_STATE); Integer awbState = captureResult.get(CaptureResult.CONTROL_AWB_STATE); if (timestamp <= lastCapturedImageTimestamp.get()) { // Don't save frames older than the most // recently-captured frame. // TODO This technically has a race condition in which // duplicate frames may be saved, but if a user is // tapping at >30Hz, duplicate images may be what they // expect. return false; } if (lensState == CaptureResult.LENS_STATE_MOVING) { // If we know the lens was moving, don't use this image. return false; } if (aeState == CaptureResult.CONTROL_AE_STATE_SEARCHING || aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE) { return false; } switch (params.flashMode) { case OFF: break; case ON: if (flashState != CaptureResult.FLASH_STATE_FIRED || flashMode != CaptureResult.FLASH_MODE_SINGLE) { return false; } break; case AUTO: if (aeState == CaptureResult.CONTROL_AE_STATE_FLASH_REQUIRED && flashState != CaptureResult.FLASH_STATE_FIRED) { return false; } break; } if (afState == CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN || afState == CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN) { return false; } if (awbState == CaptureResult.CONTROL_AWB_STATE_SEARCHING) { return false; } return true; } }); // This constraint lets us capture images which have been explicitly // requested. See {@link RequestTag.EXPLICIT_CAPTURE}. ArrayList<ImageCaptureManager.CapturedImageConstraint> singleCaptureConstraint = new ArrayList<>(); singleCaptureConstraint.add(new ImageCaptureManager.CapturedImageConstraint() { @Override public boolean satisfiesConstraint(TotalCaptureResult captureResult) { Object tag = captureResult.getRequest().getTag(); return tag == RequestTag.EXPLICIT_CAPTURE; } }); // If we can use ZSL, try to save a previously-captured frame, if an // acceptable one exists in the buffer. if (useZSL) { boolean capturedPreviousFrame = captureManager .tryCaptureExistingImage(new ImageCaptureTask(params, session), zslConstraints); if (capturedPreviousFrame) { Timber.v("Saving previous frame"); onShutterInvokeUI(params); } else { Timber.v("No good image Available. Capturing next available good image."); // If there was no good frame available in the ring buffer // already, capture the next good image. // TODO Disable the shutter button until this image is captured. if (params.flashMode == Flash.ON || params.flashMode == Flash.AUTO) { // We must issue a request for a single capture using the // flash, including an AE precapture trigger. // The following sets up a sequence of events which will // occur in reverse order to the associated method // calls: // 1. Send a request to trigger the Auto Exposure Precapture // 2. Wait for the AE_STATE to leave the PRECAPTURE state, // and then send a request for a single image, with the // appropriate flash settings. // 3. Capture the next appropriate image, which should be // the one we requested in (2). captureManager.captureNextImage(new ImageCaptureTask(params, session), singleCaptureConstraint); captureManager.addMetadataChangeListener(CaptureResult.CONTROL_AE_STATE, new ImageCaptureManager.MetadataChangeListener() { @Override public void onImageMetadataChange(Key<?> key, Object oldValue, Object newValue, CaptureResult result) { Timber.v("AE State Changed"); if (oldValue .equals(Integer.valueOf(CaptureResult.CONTROL_AE_STATE_PRECAPTURE))) { captureManager.removeMetadataChangeListener(key, this); sendSingleRequest(params); // TODO: Delay this until onCaptureStarted(). onShutterInvokeUI(params); } } }); sendAutoExposureTriggerRequest(params.flashMode); } else { // We may get here if, for example, the auto focus is in the // middle of a scan. // If the flash is off, we should just wait for the next // image that arrives. This will have minimal delay since we // do not need to send a new capture request. captureManager.captureNextImage(new ImageCaptureTask(params, session), zslConstraints); } } } else { // TODO If we can't save a previous frame, create a new capture // request to do what we need (e.g. flash) and call // captureNextImage(). throw new UnsupportedOperationException("Non-ZSL capture not yet supported"); } }
From source file:com.example.camera2apidemo.Camera2Fragment.java
private void lockFocus() { try {//from ww w . ja v a2s.c o m mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START); CameraCaptureSession.CaptureCallback mLockFocusCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Integer afState = result.get(CaptureResult.CONTROL_AF_STATE); if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState || CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) { Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) { captureStillPicture(); } else { runPrecaptureSequence(); } } } }; mState = STATE_WAITING_LOCK; mCaptureSession.capture(mPreviewRequestBuilder.build(), mLockFocusCallback, mBackgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } }
From source file:com.example.camera2apidemo.Camera2Fragment.java
private void runPrecaptureSequence() { try {/*from ww w . java 2s. co m*/ mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START); CameraCaptureSession.CaptureCallback mPrecaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureProgressed(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull CaptureResult partialResult) { Integer aeState = partialResult.get(CaptureResult.CONTROL_AE_STATE); if (aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE || aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) { mState = STATE_WAITING_NON_PRECAPTURE; } } @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { if (mState == STATE_WAITING_NON_PRECAPTURE) { Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) { mState = STATE_PICTURE_TAKEN; captureStillPicture(); } } } }; mCaptureSession.capture(mPreviewRequestBuilder.build(), mPrecaptureCallback, mBackgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } }
From source file:com.android.camera.one.v2.OneCameraZslImpl.java
/** * Take a picture.//from w ww . jav a 2 s .c o m */ @Override public void takePicture(final PhotoCaptureParameters params, final CaptureSession session) { mReadyStateManager.setInput(ReadyStateRequirement.CAPTURE_NOT_IN_PROGRESS, false); boolean useZSL = ZSL_ENABLED; // We will only capture images from the zsl ring-buffer which satisfy // this constraint. ArrayList<ImageCaptureManager.CapturedImageConstraint> zslConstraints = new ArrayList<ImageCaptureManager.CapturedImageConstraint>(); zslConstraints.add(new ImageCaptureManager.CapturedImageConstraint() { @Override public boolean satisfiesConstraint(TotalCaptureResult captureResult) { Long timestamp = captureResult.get(CaptureResult.SENSOR_TIMESTAMP); Integer lensState = captureResult.get(CaptureResult.LENS_STATE); Integer flashState = captureResult.get(CaptureResult.FLASH_STATE); Integer flashMode = captureResult.get(CaptureResult.FLASH_MODE); Integer aeState = captureResult.get(CaptureResult.CONTROL_AE_STATE); Integer afState = captureResult.get(CaptureResult.CONTROL_AF_STATE); Integer awbState = captureResult.get(CaptureResult.CONTROL_AWB_STATE); if (lensState == null) { lensState = CaptureResult.LENS_STATE_STATIONARY; } if (flashState == null) { flashState = CaptureResult.FLASH_STATE_UNAVAILABLE; } if (flashMode == null) { flashMode = CaptureResult.FLASH_MODE_OFF; } if (aeState == null) { aeState = CaptureResult.CONTROL_AE_STATE_INACTIVE; } if (afState == null) { afState = CaptureResult.CONTROL_AF_STATE_INACTIVE; } if (awbState == null) { awbState = CaptureResult.CONTROL_AWB_STATE_INACTIVE; } synchronized (mCapturedImageTimestamps) { if (mCapturedImageTimestamps.contains(timestamp)) { // Don't save frames which we've already saved. return false; } } if (lensState == CaptureResult.LENS_STATE_MOVING) { // If we know the lens was moving, don't use this image. return false; } if (aeState == CaptureResult.CONTROL_AE_STATE_SEARCHING || aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE) { return false; } if (afState == CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN || afState == CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN) { return false; } if (awbState == CaptureResult.CONTROL_AWB_STATE_SEARCHING) { return false; } return true; } }); // This constraint lets us capture images which have been explicitly // requested. See {@link RequestTag.EXPLICIT_CAPTURE}. ArrayList<ImageCaptureManager.CapturedImageConstraint> singleCaptureConstraint = new ArrayList<ImageCaptureManager.CapturedImageConstraint>(); singleCaptureConstraint.add(new ImageCaptureManager.CapturedImageConstraint() { @Override public boolean satisfiesConstraint(TotalCaptureResult captureResult) { Object tag = captureResult.getRequest().getTag(); return tag == RequestTag.EXPLICIT_CAPTURE; } }); // If we can use ZSL, try to save a previously-captured frame, if an // acceptable one exists in the buffer. if (useZSL) { boolean capturedPreviousFrame = mCaptureManager .tryCaptureExistingImage(new ImageCaptureTask(params, session), zslConstraints); if (capturedPreviousFrame) { Log.v(TAG, "Saving previous frame"); onShutterInvokeUI(params); } else { Log.v(TAG, "No good image Available. Capturing next available good image."); // If there was no good frame available in the ring buffer // already, capture the next good image. // TODO Disable the shutter button until this image is captured. Flash flashMode = Flash.OFF; if (flashMode == Flash.ON || flashMode == Flash.AUTO) { // We must issue a request for a single capture using the // flash, including an AE precapture trigger. // The following sets up a sequence of events which will // occur in reverse order to the associated method // calls: // 1. Send a request to trigger the Auto Exposure Precapture // 2. Wait for the AE_STATE to leave the PRECAPTURE state, // and then send a request for a single image, with the // appropriate flash settings. // 3. Capture the next appropriate image, which should be // the one we requested in (2). mCaptureManager.captureNextImage(new ImageCaptureTask(params, session), singleCaptureConstraint); mCaptureManager.addMetadataChangeListener(CaptureResult.CONTROL_AE_STATE, new MetadataChangeListener() { @Override public void onImageMetadataChange(Key<?> key, Object oldValue, Object newValue, CaptureResult result) { Log.v(TAG, "AE State Changed"); if (oldValue .equals(Integer.valueOf(CaptureResult.CONTROL_AE_STATE_PRECAPTURE))) { mCaptureManager.removeMetadataChangeListener(key, this); sendSingleRequest(params); // TODO: Delay this until // onCaptureStarted(). onShutterInvokeUI(params); } } }); sendAutoExposureTriggerRequest(flashMode); } else { // We may get here if, for example, the auto focus is in the // middle of a scan. // If the flash is off, we should just wait for the next // image that arrives. This will have minimal delay since we // do not need to send a new capture request. mCaptureManager.captureNextImage(new ImageCaptureTask(params, session), zslConstraints); } } } else { // TODO If we can't save a previous frame, create a new capture // request to do what we need (e.g. flash) and call // captureNextImage(). throw new UnsupportedOperationException("Non-ZSL capture not yet supported"); } }