| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.camera2.impl; |
| |
| import static android.hardware.camera2.CameraAccessException.CAMERA_IN_USE; |
| |
| import android.hardware.camera2.CameraAccessException; |
| import android.hardware.camera2.CameraCaptureSession; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraDevice; |
| import android.hardware.camera2.CaptureRequest; |
| import android.hardware.camera2.CaptureResult; |
| import android.hardware.camera2.CaptureFailure; |
| import android.hardware.camera2.ICameraDeviceCallbacks; |
| import android.hardware.camera2.ICameraDeviceUser; |
| import android.hardware.camera2.TotalCaptureResult; |
| import android.hardware.camera2.utils.CameraBinderDecorator; |
| import android.hardware.camera2.utils.CameraRuntimeException; |
| import android.hardware.camera2.utils.LongParcelable; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.RemoteException; |
| import android.util.Log; |
| import android.util.SparseArray; |
| import android.view.Surface; |
| |
| import java.util.AbstractMap.SimpleEntry; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.TreeSet; |
| |
| /** |
| * HAL2.1+ implementation of CameraDevice. Use CameraManager#open to instantiate |
| */ |
| public class CameraDeviceImpl extends CameraDevice { |
| private final String TAG; |
| private final boolean DEBUG; |
| |
| private static final int REQUEST_ID_NONE = -1; |
| |
| // TODO: guard every function with if (!mRemoteDevice) check (if it was closed) |
| private ICameraDeviceUser mRemoteDevice; |
| |
| // Lock to synchronize cross-thread access to device public interface |
| final Object mInterfaceLock = new Object(); // access from this class and Session only! |
| private final CameraDeviceCallbacks mCallbacks = new CameraDeviceCallbacks(); |
| |
| private final StateCallback mDeviceCallback; |
| private volatile StateCallbackKK mSessionStateCallback; |
| private final Handler mDeviceHandler; |
| |
| private volatile boolean mClosing = false; |
| private boolean mInError = false; |
| private boolean mIdle = true; |
| |
| /** map request IDs to callback/request data */ |
| private final SparseArray<CaptureCallbackHolder> mCaptureCallbackMap = |
| new SparseArray<CaptureCallbackHolder>(); |
| |
| private int mRepeatingRequestId = REQUEST_ID_NONE; |
| private final ArrayList<Integer> mRepeatingRequestIdDeletedList = new ArrayList<Integer>(); |
| // Map stream IDs to Surfaces |
| private final SparseArray<Surface> mConfiguredOutputs = new SparseArray<Surface>(); |
| |
| private final String mCameraId; |
| private final CameraCharacteristics mCharacteristics; |
| private final int mTotalPartialCount; |
| |
| /** |
| * A list tracking request and its expected last frame. |
| * Updated when calling ICameraDeviceUser methods. |
| */ |
| private final List<SimpleEntry</*frameNumber*/Long, /*requestId*/Integer>> |
| mFrameNumberRequestPairs = new ArrayList<SimpleEntry<Long, Integer>>(); |
| |
| /** |
| * An object tracking received frame numbers. |
| * Updated when receiving callbacks from ICameraDeviceCallbacks. |
| */ |
| private final FrameNumberTracker mFrameNumberTracker = new FrameNumberTracker(); |
| |
| private CameraCaptureSessionImpl mCurrentSession; |
| private int mNextSessionId = 0; |
| |
| // Runnables for all state transitions, except error, which needs the |
| // error code argument |
| |
| private final Runnable mCallOnOpened = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onOpened(CameraDeviceImpl.this); |
| } |
| mDeviceCallback.onOpened(CameraDeviceImpl.this); |
| } |
| }; |
| |
| private final Runnable mCallOnUnconfigured = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onUnconfigured(CameraDeviceImpl.this); |
| } |
| } |
| }; |
| |
| private final Runnable mCallOnActive = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onActive(CameraDeviceImpl.this); |
| } |
| } |
| }; |
| |
| private final Runnable mCallOnBusy = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onBusy(CameraDeviceImpl.this); |
| } |
| } |
| }; |
| |
| private final Runnable mCallOnClosed = new Runnable() { |
| private boolean mClosedOnce = false; |
| |
| @Override |
| public void run() { |
| if (mClosedOnce) { |
| throw new AssertionError("Don't post #onClosed more than once"); |
| } |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onClosed(CameraDeviceImpl.this); |
| } |
| mDeviceCallback.onClosed(CameraDeviceImpl.this); |
| mClosedOnce = true; |
| } |
| }; |
| |
| private final Runnable mCallOnIdle = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onIdle(CameraDeviceImpl.this); |
| } |
| } |
| }; |
| |
| private final Runnable mCallOnDisconnected = new Runnable() { |
| @Override |
| public void run() { |
| StateCallbackKK sessionCallback = null; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| sessionCallback = mSessionStateCallback; |
| } |
| if (sessionCallback != null) { |
| sessionCallback.onDisconnected(CameraDeviceImpl.this); |
| } |
| mDeviceCallback.onDisconnected(CameraDeviceImpl.this); |
| } |
| }; |
| |
| public CameraDeviceImpl(String cameraId, StateCallback callback, Handler handler, |
| CameraCharacteristics characteristics) { |
| if (cameraId == null || callback == null || handler == null || characteristics == null) { |
| throw new IllegalArgumentException("Null argument given"); |
| } |
| mCameraId = cameraId; |
| mDeviceCallback = callback; |
| mDeviceHandler = handler; |
| mCharacteristics = characteristics; |
| |
| final int MAX_TAG_LEN = 23; |
| String tag = String.format("CameraDevice-JV-%s", mCameraId); |
| if (tag.length() > MAX_TAG_LEN) { |
| tag = tag.substring(0, MAX_TAG_LEN); |
| } |
| TAG = tag; |
| DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| Integer partialCount = |
| mCharacteristics.get(CameraCharacteristics.REQUEST_PARTIAL_RESULT_COUNT); |
| if (partialCount == null) { |
| // 1 means partial result is not supported. |
| mTotalPartialCount = 1; |
| } else { |
| mTotalPartialCount = partialCount; |
| } |
| } |
| |
| public CameraDeviceCallbacks getCallbacks() { |
| return mCallbacks; |
| } |
| |
| public void setRemoteDevice(ICameraDeviceUser remoteDevice) { |
| synchronized(mInterfaceLock) { |
| // TODO: Move from decorator to direct binder-mediated exceptions |
| // If setRemoteFailure already called, do nothing |
| if (mInError) return; |
| |
| mRemoteDevice = CameraBinderDecorator.newInstance(remoteDevice); |
| |
| mDeviceHandler.post(mCallOnOpened); |
| mDeviceHandler.post(mCallOnUnconfigured); |
| } |
| } |
| |
| /** |
| * Call to indicate failed connection to a remote camera device. |
| * |
| * <p>This places the camera device in the error state and informs the callback. |
| * Use in place of setRemoteDevice() when startup fails.</p> |
| */ |
| public void setRemoteFailure(final CameraRuntimeException failure) { |
| int failureCode = StateCallback.ERROR_CAMERA_DEVICE; |
| boolean failureIsError = true; |
| |
| switch (failure.getReason()) { |
| case CameraAccessException.CAMERA_IN_USE: |
| failureCode = StateCallback.ERROR_CAMERA_IN_USE; |
| break; |
| case CameraAccessException.MAX_CAMERAS_IN_USE: |
| failureCode = StateCallback.ERROR_MAX_CAMERAS_IN_USE; |
| break; |
| case CameraAccessException.CAMERA_DISABLED: |
| failureCode = StateCallback.ERROR_CAMERA_DISABLED; |
| break; |
| case CameraAccessException.CAMERA_DISCONNECTED: |
| failureIsError = false; |
| break; |
| case CameraAccessException.CAMERA_ERROR: |
| failureCode = StateCallback.ERROR_CAMERA_DEVICE; |
| break; |
| default: |
| Log.wtf(TAG, "Unknown failure in opening camera device: " + failure.getReason()); |
| break; |
| } |
| final int code = failureCode; |
| final boolean isError = failureIsError; |
| synchronized(mInterfaceLock) { |
| mInError = true; |
| mDeviceHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| if (isError) { |
| mDeviceCallback.onError(CameraDeviceImpl.this, code); |
| } else { |
| mDeviceCallback.onDisconnected(CameraDeviceImpl.this); |
| } |
| } |
| }); |
| } |
| } |
| |
| @Override |
| public String getId() { |
| return mCameraId; |
| } |
| |
| public void configureOutputs(List<Surface> outputs) throws CameraAccessException { |
| // Leave this here for backwards compatibility with older code using this directly |
| configureOutputsChecked(outputs); |
| } |
| |
| /** |
| * Attempt to configure the outputs; the device goes to idle and then configures the |
| * new outputs if possible. |
| * |
| * <p>The configuration may gracefully fail, if there are too many outputs, if the formats |
| * are not supported, or if the sizes for that format is not supported. In this case this |
| * function will return {@code false} and the unconfigured callback will be fired.</p> |
| * |
| * <p>If the configuration succeeds (with 1 or more outputs), then the idle callback is fired. |
| * Unconfiguring the device always fires the idle callback.</p> |
| * |
| * @param outputs a list of one or more surfaces, or {@code null} to unconfigure |
| * @return whether or not the configuration was successful |
| * |
| * @throws CameraAccessException if there were any unexpected problems during configuration |
| */ |
| public boolean configureOutputsChecked(List<Surface> outputs) throws CameraAccessException { |
| // Treat a null input the same an empty list |
| if (outputs == null) { |
| outputs = new ArrayList<Surface>(); |
| } |
| boolean success = false; |
| |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| |
| HashSet<Surface> addSet = new HashSet<Surface>(outputs); // Streams to create |
| List<Integer> deleteList = new ArrayList<Integer>(); // Streams to delete |
| |
| // Determine which streams need to be created, which to be deleted |
| for (int i = 0; i < mConfiguredOutputs.size(); ++i) { |
| int streamId = mConfiguredOutputs.keyAt(i); |
| Surface s = mConfiguredOutputs.valueAt(i); |
| |
| if (!outputs.contains(s)) { |
| deleteList.add(streamId); |
| } else { |
| addSet.remove(s); // Don't create a stream previously created |
| } |
| } |
| |
| mDeviceHandler.post(mCallOnBusy); |
| stopRepeating(); |
| |
| try { |
| waitUntilIdle(); |
| |
| mRemoteDevice.beginConfigure(); |
| // Delete all streams first (to free up HW resources) |
| for (Integer streamId : deleteList) { |
| mRemoteDevice.deleteStream(streamId); |
| mConfiguredOutputs.delete(streamId); |
| } |
| |
| // Add all new streams |
| for (Surface s : addSet) { |
| int streamId = mRemoteDevice.createStream(s); |
| mConfiguredOutputs.put(streamId, s); |
| } |
| |
| try { |
| mRemoteDevice.endConfigure(); |
| } |
| catch (IllegalArgumentException e) { |
| // OK. camera service can reject stream config if it's not supported by HAL |
| // This is only the result of a programmer misusing the camera2 api. |
| Log.w(TAG, "Stream configuration failed"); |
| return false; |
| } |
| |
| success = true; |
| } catch (CameraRuntimeException e) { |
| if (e.getReason() == CAMERA_IN_USE) { |
| throw new IllegalStateException("The camera is currently busy." + |
| " You must wait until the previous operation completes."); |
| } |
| |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return false; |
| } finally { |
| if (success && outputs.size() > 0) { |
| mDeviceHandler.post(mCallOnIdle); |
| } else { |
| // Always return to the 'unconfigured' state if we didn't hit a fatal error |
| mDeviceHandler.post(mCallOnUnconfigured); |
| } |
| } |
| } |
| |
| return success; |
| } |
| |
| @Override |
| public void createCaptureSession(List<Surface> outputs, |
| CameraCaptureSession.StateCallback callback, Handler handler) |
| throws CameraAccessException { |
| synchronized(mInterfaceLock) { |
| if (DEBUG) { |
| Log.d(TAG, "createCaptureSession"); |
| } |
| |
| checkIfCameraClosedOrInError(); |
| |
| // Notify current session that it's going away, before starting camera operations |
| // After this call completes, the session is not allowed to call into CameraDeviceImpl |
| if (mCurrentSession != null) { |
| mCurrentSession.replaceSessionClose(); |
| } |
| |
| // TODO: dont block for this |
| boolean configureSuccess = true; |
| CameraAccessException pendingException = null; |
| try { |
| configureSuccess = configureOutputsChecked(outputs); // and then block until IDLE |
| } catch (CameraAccessException e) { |
| configureSuccess = false; |
| pendingException = e; |
| if (DEBUG) { |
| Log.v(TAG, "createCaptureSession - failed with exception ", e); |
| } |
| } |
| |
| // Fire onConfigured if configureOutputs succeeded, fire onConfigureFailed otherwise. |
| CameraCaptureSessionImpl newSession = |
| new CameraCaptureSessionImpl(mNextSessionId++, |
| outputs, callback, handler, this, mDeviceHandler, |
| configureSuccess); |
| |
| // TODO: wait until current session closes, then create the new session |
| mCurrentSession = newSession; |
| |
| if (pendingException != null) { |
| throw pendingException; |
| } |
| |
| mSessionStateCallback = mCurrentSession.getDeviceStateCallback(); |
| } |
| } |
| |
| /** |
| * For use by backwards-compatibility code only. |
| */ |
| public void setSessionListener(StateCallbackKK sessionCallback) { |
| synchronized(mInterfaceLock) { |
| mSessionStateCallback = sessionCallback; |
| } |
| } |
| |
| @Override |
| public CaptureRequest.Builder createCaptureRequest(int templateType) |
| throws CameraAccessException { |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| |
| CameraMetadataNative templatedRequest = new CameraMetadataNative(); |
| |
| try { |
| mRemoteDevice.createDefaultRequest(templateType, /*out*/templatedRequest); |
| } catch (CameraRuntimeException e) { |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return null; |
| } |
| |
| CaptureRequest.Builder builder = |
| new CaptureRequest.Builder(templatedRequest); |
| |
| return builder; |
| } |
| } |
| |
| public int capture(CaptureRequest request, CaptureCallback callback, Handler handler) |
| throws CameraAccessException { |
| if (DEBUG) { |
| Log.d(TAG, "calling capture"); |
| } |
| List<CaptureRequest> requestList = new ArrayList<CaptureRequest>(); |
| requestList.add(request); |
| return submitCaptureRequest(requestList, callback, handler, /*streaming*/false); |
| } |
| |
| public int captureBurst(List<CaptureRequest> requests, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| if (requests == null || requests.isEmpty()) { |
| throw new IllegalArgumentException("At least one request must be given"); |
| } |
| return submitCaptureRequest(requests, callback, handler, /*streaming*/false); |
| } |
| |
| /** |
| * This method checks lastFrameNumber returned from ICameraDeviceUser methods for |
| * starting and stopping repeating request and flushing. |
| * |
| * <p>If lastFrameNumber is NO_FRAMES_CAPTURED, it means that the request was never |
| * sent to HAL. Then onCaptureSequenceAborted is immediately triggered. |
| * If lastFrameNumber is non-negative, then the requestId and lastFrameNumber pair |
| * is added to the list mFrameNumberRequestPairs.</p> |
| * |
| * @param requestId the request ID of the current repeating request. |
| * |
| * @param lastFrameNumber last frame number returned from binder. |
| */ |
| private void checkEarlyTriggerSequenceComplete( |
| final int requestId, final long lastFrameNumber) { |
| // lastFrameNumber being equal to NO_FRAMES_CAPTURED means that the request |
| // was never sent to HAL. Should trigger onCaptureSequenceAborted immediately. |
| if (lastFrameNumber == CaptureCallback.NO_FRAMES_CAPTURED) { |
| final CaptureCallbackHolder holder; |
| int index = mCaptureCallbackMap.indexOfKey(requestId); |
| holder = (index >= 0) ? mCaptureCallbackMap.valueAt(index) : null; |
| if (holder != null) { |
| mCaptureCallbackMap.removeAt(index); |
| if (DEBUG) { |
| Log.v(TAG, String.format( |
| "remove holder for requestId %d, " |
| + "because lastFrame is %d.", |
| requestId, lastFrameNumber)); |
| } |
| } |
| |
| if (holder != null) { |
| if (DEBUG) { |
| Log.v(TAG, "immediately trigger onCaptureSequenceAborted because" |
| + " request did not reach HAL"); |
| } |
| |
| Runnable resultDispatch = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()) { |
| if (DEBUG) { |
| Log.d(TAG, String.format( |
| "early trigger sequence complete for request %d", |
| requestId)); |
| } |
| if (lastFrameNumber < Integer.MIN_VALUE |
| || lastFrameNumber > Integer.MAX_VALUE) { |
| throw new AssertionError(lastFrameNumber + " cannot be cast to int"); |
| } |
| holder.getCallback().onCaptureSequenceAborted( |
| CameraDeviceImpl.this, |
| requestId); |
| } |
| } |
| }; |
| holder.getHandler().post(resultDispatch); |
| } else { |
| Log.w(TAG, String.format( |
| "did not register callback to request %d", |
| requestId)); |
| } |
| } else { |
| mFrameNumberRequestPairs.add( |
| new SimpleEntry<Long, Integer>(lastFrameNumber, |
| requestId)); |
| // It is possible that the last frame has already arrived, so we need to check |
| // for sequence completion right away |
| checkAndFireSequenceComplete(); |
| } |
| } |
| |
| private int submitCaptureRequest(List<CaptureRequest> requestList, CaptureCallback callback, |
| Handler handler, boolean repeating) throws CameraAccessException { |
| |
| // Need a valid handler, or current thread needs to have a looper, if |
| // callback is valid |
| handler = checkHandler(handler, callback); |
| |
| // Make sure that there all requests have at least 1 surface; all surfaces are non-null |
| for (CaptureRequest request : requestList) { |
| if (request.getTargets().isEmpty()) { |
| throw new IllegalArgumentException( |
| "Each request must have at least one Surface target"); |
| } |
| |
| for (Surface surface : request.getTargets()) { |
| if (surface == null) { |
| throw new IllegalArgumentException("Null Surface targets are not allowed"); |
| } |
| } |
| } |
| |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| int requestId; |
| |
| if (repeating) { |
| stopRepeating(); |
| } |
| |
| LongParcelable lastFrameNumberRef = new LongParcelable(); |
| try { |
| requestId = mRemoteDevice.submitRequestList(requestList, repeating, |
| /*out*/lastFrameNumberRef); |
| if (DEBUG) { |
| Log.v(TAG, "last frame number " + lastFrameNumberRef.getNumber()); |
| } |
| } catch (CameraRuntimeException e) { |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return -1; |
| } |
| |
| if (callback != null) { |
| mCaptureCallbackMap.put(requestId, new CaptureCallbackHolder(callback, |
| requestList, handler, repeating)); |
| } else { |
| if (DEBUG) { |
| Log.d(TAG, "Listen for request " + requestId + " is null"); |
| } |
| } |
| |
| long lastFrameNumber = lastFrameNumberRef.getNumber(); |
| |
| if (repeating) { |
| if (mRepeatingRequestId != REQUEST_ID_NONE) { |
| checkEarlyTriggerSequenceComplete(mRepeatingRequestId, lastFrameNumber); |
| } |
| mRepeatingRequestId = requestId; |
| } else { |
| mFrameNumberRequestPairs.add( |
| new SimpleEntry<Long, Integer>(lastFrameNumber, requestId)); |
| } |
| |
| if (mIdle) { |
| mDeviceHandler.post(mCallOnActive); |
| } |
| mIdle = false; |
| |
| return requestId; |
| } |
| } |
| |
| public int setRepeatingRequest(CaptureRequest request, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| List<CaptureRequest> requestList = new ArrayList<CaptureRequest>(); |
| requestList.add(request); |
| return submitCaptureRequest(requestList, callback, handler, /*streaming*/true); |
| } |
| |
| public int setRepeatingBurst(List<CaptureRequest> requests, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| if (requests == null || requests.isEmpty()) { |
| throw new IllegalArgumentException("At least one request must be given"); |
| } |
| return submitCaptureRequest(requests, callback, handler, /*streaming*/true); |
| } |
| |
| public void stopRepeating() throws CameraAccessException { |
| |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| if (mRepeatingRequestId != REQUEST_ID_NONE) { |
| |
| int requestId = mRepeatingRequestId; |
| mRepeatingRequestId = REQUEST_ID_NONE; |
| |
| // Queue for deletion after in-flight requests finish |
| if (mCaptureCallbackMap.get(requestId) != null) { |
| mRepeatingRequestIdDeletedList.add(requestId); |
| } |
| |
| try { |
| LongParcelable lastFrameNumberRef = new LongParcelable(); |
| mRemoteDevice.cancelRequest(requestId, /*out*/lastFrameNumberRef); |
| long lastFrameNumber = lastFrameNumberRef.getNumber(); |
| |
| checkEarlyTriggerSequenceComplete(requestId, lastFrameNumber); |
| |
| } catch (CameraRuntimeException e) { |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return; |
| } |
| } |
| } |
| } |
| |
| private void waitUntilIdle() throws CameraAccessException { |
| |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| |
| if (mRepeatingRequestId != REQUEST_ID_NONE) { |
| throw new IllegalStateException("Active repeating request ongoing"); |
| } |
| try { |
| mRemoteDevice.waitUntilIdle(); |
| } catch (CameraRuntimeException e) { |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return; |
| } |
| } |
| } |
| |
| public void flush() throws CameraAccessException { |
| synchronized(mInterfaceLock) { |
| checkIfCameraClosedOrInError(); |
| |
| mDeviceHandler.post(mCallOnBusy); |
| |
| // If already idle, just do a busy->idle transition immediately, don't actually |
| // flush. |
| if (mIdle) { |
| mDeviceHandler.post(mCallOnIdle); |
| return; |
| } |
| try { |
| LongParcelable lastFrameNumberRef = new LongParcelable(); |
| mRemoteDevice.flush(/*out*/lastFrameNumberRef); |
| if (mRepeatingRequestId != REQUEST_ID_NONE) { |
| long lastFrameNumber = lastFrameNumberRef.getNumber(); |
| checkEarlyTriggerSequenceComplete(mRepeatingRequestId, lastFrameNumber); |
| mRepeatingRequestId = REQUEST_ID_NONE; |
| } |
| } catch (CameraRuntimeException e) { |
| throw e.asChecked(); |
| } catch (RemoteException e) { |
| // impossible |
| return; |
| } |
| } |
| } |
| |
| @Override |
| public void close() { |
| synchronized (mInterfaceLock) { |
| try { |
| if (mRemoteDevice != null) { |
| mRemoteDevice.disconnect(); |
| } |
| } catch (CameraRuntimeException e) { |
| Log.e(TAG, "Exception while closing: ", e.asChecked()); |
| } catch (RemoteException e) { |
| // impossible |
| } |
| |
| // Only want to fire the onClosed callback once; |
| // either a normal close where the remote device is valid |
| // or a close after a startup error (no remote device but in error state) |
| if (mRemoteDevice != null || mInError) { |
| mDeviceHandler.post(mCallOnClosed); |
| } |
| |
| mRemoteDevice = null; |
| mInError = false; |
| } |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| close(); |
| } |
| finally { |
| super.finalize(); |
| } |
| } |
| |
| /** |
| * <p>A callback for tracking the progress of a {@link CaptureRequest} |
| * submitted to the camera device.</p> |
| * |
| */ |
| public static abstract class CaptureCallback { |
| |
| /** |
| * This constant is used to indicate that no images were captured for |
| * the request. |
| * |
| * @hide |
| */ |
| public static final int NO_FRAMES_CAPTURED = -1; |
| |
| /** |
| * This method is called when the camera device has started capturing |
| * the output image for the request, at the beginning of image exposure. |
| * |
| * @see android.media.MediaActionSound |
| */ |
| public void onCaptureStarted(CameraDevice camera, |
| CaptureRequest request, long timestamp, long frameNumber) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called when some results from an image capture are |
| * available. |
| * |
| * @hide |
| */ |
| public void onCapturePartial(CameraDevice camera, |
| CaptureRequest request, CaptureResult result) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called when an image capture makes partial forward progress; some |
| * (but not all) results from an image capture are available. |
| * |
| */ |
| public void onCaptureProgressed(CameraDevice camera, |
| CaptureRequest request, CaptureResult partialResult) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called when an image capture has fully completed and all the |
| * result metadata is available. |
| */ |
| public void onCaptureCompleted(CameraDevice camera, |
| CaptureRequest request, TotalCaptureResult result) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called instead of {@link #onCaptureCompleted} when the |
| * camera device failed to produce a {@link CaptureResult} for the |
| * request. |
| */ |
| public void onCaptureFailed(CameraDevice camera, |
| CaptureRequest request, CaptureFailure failure) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called independently of the others in CaptureCallback, |
| * when a capture sequence finishes and all {@link CaptureResult} |
| * or {@link CaptureFailure} for it have been returned via this callback. |
| */ |
| public void onCaptureSequenceCompleted(CameraDevice camera, |
| int sequenceId, long frameNumber) { |
| // default empty implementation |
| } |
| |
| /** |
| * This method is called independently of the others in CaptureCallback, |
| * when a capture sequence aborts before any {@link CaptureResult} |
| * or {@link CaptureFailure} for it have been returned via this callback. |
| */ |
| public void onCaptureSequenceAborted(CameraDevice camera, |
| int sequenceId) { |
| // default empty implementation |
| } |
| } |
| |
| /** |
| * A callback for notifications about the state of a camera device, adding in the callbacks that |
| * were part of the earlier KK API design, but now only used internally. |
| */ |
| public static abstract class StateCallbackKK extends StateCallback { |
| /** |
| * The method called when a camera device has no outputs configured. |
| * |
| */ |
| public void onUnconfigured(CameraDevice camera) { |
| // Default empty implementation |
| } |
| |
| /** |
| * The method called when a camera device begins processing |
| * {@link CaptureRequest capture requests}. |
| * |
| */ |
| public void onActive(CameraDevice camera) { |
| // Default empty implementation |
| } |
| |
| /** |
| * The method called when a camera device is busy. |
| * |
| */ |
| public void onBusy(CameraDevice camera) { |
| // Default empty implementation |
| } |
| |
| /** |
| * The method called when a camera device has finished processing all |
| * submitted capture requests and has reached an idle state. |
| * |
| */ |
| public void onIdle(CameraDevice camera) { |
| // Default empty implementation |
| } |
| } |
| |
| static class CaptureCallbackHolder { |
| |
| private final boolean mRepeating; |
| private final CaptureCallback mCallback; |
| private final List<CaptureRequest> mRequestList; |
| private final Handler mHandler; |
| |
| CaptureCallbackHolder(CaptureCallback callback, List<CaptureRequest> requestList, |
| Handler handler, boolean repeating) { |
| if (callback == null || handler == null) { |
| throw new UnsupportedOperationException( |
| "Must have a valid handler and a valid callback"); |
| } |
| mRepeating = repeating; |
| mHandler = handler; |
| mRequestList = new ArrayList<CaptureRequest>(requestList); |
| mCallback = callback; |
| } |
| |
| public boolean isRepeating() { |
| return mRepeating; |
| } |
| |
| public CaptureCallback getCallback() { |
| return mCallback; |
| } |
| |
| public CaptureRequest getRequest(int subsequenceId) { |
| if (subsequenceId >= mRequestList.size()) { |
| throw new IllegalArgumentException( |
| String.format( |
| "Requested subsequenceId %d is larger than request list size %d.", |
| subsequenceId, mRequestList.size())); |
| } else { |
| if (subsequenceId < 0) { |
| throw new IllegalArgumentException(String.format( |
| "Requested subsequenceId %d is negative", subsequenceId)); |
| } else { |
| return mRequestList.get(subsequenceId); |
| } |
| } |
| } |
| |
| public CaptureRequest getRequest() { |
| return getRequest(0); |
| } |
| |
| public Handler getHandler() { |
| return mHandler; |
| } |
| |
| } |
| |
| /** |
| * This class tracks the last frame number for submitted requests. |
| */ |
| public class FrameNumberTracker { |
| |
| private long mCompletedFrameNumber = -1; |
| private final TreeSet<Long> mFutureErrorSet = new TreeSet<Long>(); |
| /** Map frame numbers to list of partial results */ |
| private final HashMap<Long, List<CaptureResult>> mPartialResults = new HashMap<>(); |
| |
| private void update() { |
| Iterator<Long> iter = mFutureErrorSet.iterator(); |
| while (iter.hasNext()) { |
| long errorFrameNumber = iter.next(); |
| if (errorFrameNumber == mCompletedFrameNumber + 1) { |
| mCompletedFrameNumber++; |
| iter.remove(); |
| } else { |
| break; |
| } |
| } |
| } |
| |
| /** |
| * This function is called every time when a result or an error is received. |
| * @param frameNumber the frame number corresponding to the result or error |
| * @param isError true if it is an error, false if it is not an error |
| */ |
| public void updateTracker(long frameNumber, boolean isError) { |
| if (isError) { |
| mFutureErrorSet.add(frameNumber); |
| } else { |
| /** |
| * HAL cannot send an OnResultReceived for frame N unless it knows for |
| * sure that all frames prior to N have either errored out or completed. |
| * So if the current frame is not an error, then all previous frames |
| * should have arrived. The following line checks whether this holds. |
| */ |
| if (frameNumber != mCompletedFrameNumber + 1) { |
| Log.e(TAG, String.format( |
| "result frame number %d comes out of order, should be %d + 1", |
| frameNumber, mCompletedFrameNumber)); |
| // Continue on to set the completed frame number to this frame anyway, |
| // to be robust to lower-level errors and allow for clean shutdowns. |
| } |
| mCompletedFrameNumber = frameNumber; |
| } |
| update(); |
| } |
| |
| /** |
| * This function is called every time a result has been completed. |
| * |
| * <p>It keeps a track of all the partial results already created for a particular |
| * frame number.</p> |
| * |
| * @param frameNumber the frame number corresponding to the result |
| * @param result the total or partial result |
| * @param partial {@true} if the result is partial, {@code false} if total |
| */ |
| public void updateTracker(long frameNumber, CaptureResult result, boolean partial) { |
| |
| if (!partial) { |
| // Update the total result's frame status as being successful |
| updateTracker(frameNumber, /*isError*/false); |
| // Don't keep a list of total results, we don't need to track them |
| return; |
| } |
| |
| if (result == null) { |
| // Do not record blank results; this also means there will be no total result |
| // so it doesn't matter that the partials were not recorded |
| return; |
| } |
| |
| // Partial results must be aggregated in-order for that frame number |
| List<CaptureResult> partials = mPartialResults.get(frameNumber); |
| if (partials == null) { |
| partials = new ArrayList<>(); |
| mPartialResults.put(frameNumber, partials); |
| } |
| |
| partials.add(result); |
| } |
| |
| /** |
| * Attempt to pop off all of the partial results seen so far for the {@code frameNumber}. |
| * |
| * <p>Once popped-off, the partial results are forgotten (unless {@code updateTracker} |
| * is called again with new partials for that frame number).</p> |
| * |
| * @param frameNumber the frame number corresponding to the result |
| * @return a list of partial results for that frame with at least 1 element, |
| * or {@code null} if there were no partials recorded for that frame |
| */ |
| public List<CaptureResult> popPartialResults(long frameNumber) { |
| return mPartialResults.remove(frameNumber); |
| } |
| |
| public long getCompletedFrameNumber() { |
| return mCompletedFrameNumber; |
| } |
| |
| } |
| |
| private void checkAndFireSequenceComplete() { |
| long completedFrameNumber = mFrameNumberTracker.getCompletedFrameNumber(); |
| Iterator<SimpleEntry<Long, Integer> > iter = mFrameNumberRequestPairs.iterator(); |
| while (iter.hasNext()) { |
| final SimpleEntry<Long, Integer> frameNumberRequestPair = iter.next(); |
| if (frameNumberRequestPair.getKey() <= completedFrameNumber) { |
| |
| // remove request from mCaptureCallbackMap |
| final int requestId = frameNumberRequestPair.getValue(); |
| final CaptureCallbackHolder holder; |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) { |
| Log.w(TAG, "Camera closed while checking sequences"); |
| return; |
| } |
| |
| int index = mCaptureCallbackMap.indexOfKey(requestId); |
| holder = (index >= 0) ? mCaptureCallbackMap.valueAt(index) |
| : null; |
| if (holder != null) { |
| mCaptureCallbackMap.removeAt(index); |
| if (DEBUG) { |
| Log.v(TAG, String.format( |
| "remove holder for requestId %d, " |
| + "because lastFrame %d is <= %d", |
| requestId, frameNumberRequestPair.getKey(), |
| completedFrameNumber)); |
| } |
| } |
| } |
| iter.remove(); |
| |
| // Call onCaptureSequenceCompleted |
| if (holder != null) { |
| Runnable resultDispatch = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()){ |
| if (DEBUG) { |
| Log.d(TAG, String.format( |
| "fire sequence complete for request %d", |
| requestId)); |
| } |
| |
| long lastFrameNumber = frameNumberRequestPair.getKey(); |
| if (lastFrameNumber < Integer.MIN_VALUE |
| || lastFrameNumber > Integer.MAX_VALUE) { |
| throw new AssertionError(lastFrameNumber |
| + " cannot be cast to int"); |
| } |
| holder.getCallback().onCaptureSequenceCompleted( |
| CameraDeviceImpl.this, |
| requestId, |
| lastFrameNumber); |
| } |
| } |
| }; |
| holder.getHandler().post(resultDispatch); |
| } |
| |
| } |
| } |
| } |
| |
| public class CameraDeviceCallbacks extends ICameraDeviceCallbacks.Stub { |
| // |
| // Constants below need to be kept up-to-date with |
| // frameworks/av/include/camera/camera2/ICameraDeviceCallbacks.h |
| // |
| |
| // |
| // Error codes for onCameraError |
| // |
| |
| /** |
| * Camera has been disconnected |
| */ |
| public static final int ERROR_CAMERA_DISCONNECTED = 0; |
| /** |
| * Camera has encountered a device-level error |
| * Matches CameraDevice.StateCallback#ERROR_CAMERA_DEVICE |
| */ |
| public static final int ERROR_CAMERA_DEVICE = 1; |
| /** |
| * Camera has encountered a service-level error |
| * Matches CameraDevice.StateCallback#ERROR_CAMERA_SERVICE |
| */ |
| public static final int ERROR_CAMERA_SERVICE = 2; |
| /** |
| * Camera has encountered an error processing a single request. |
| */ |
| public static final int ERROR_CAMERA_REQUEST = 3; |
| /** |
| * Camera has encountered an error producing metadata for a single capture |
| */ |
| public static final int ERROR_CAMERA_RESULT = 4; |
| /** |
| * Camera has encountered an error producing an image buffer for a single capture |
| */ |
| public static final int ERROR_CAMERA_BUFFER = 5; |
| |
| @Override |
| public IBinder asBinder() { |
| return this; |
| } |
| |
| @Override |
| public void onDeviceError(final int errorCode, CaptureResultExtras resultExtras) { |
| if (DEBUG) { |
| Log.d(TAG, String.format( |
| "Device error received, code %d, frame number %d, request ID %d, subseq ID %d", |
| errorCode, resultExtras.getFrameNumber(), resultExtras.getRequestId(), |
| resultExtras.getSubsequenceId())); |
| } |
| |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) { |
| return; // Camera already closed |
| } |
| |
| switch (errorCode) { |
| case ERROR_CAMERA_DISCONNECTED: |
| CameraDeviceImpl.this.mDeviceHandler.post(mCallOnDisconnected); |
| break; |
| default: |
| Log.e(TAG, "Unknown error from camera device: " + errorCode); |
| // no break |
| case ERROR_CAMERA_DEVICE: |
| case ERROR_CAMERA_SERVICE: |
| mInError = true; |
| Runnable r = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()) { |
| mDeviceCallback.onError(CameraDeviceImpl.this, errorCode); |
| } |
| } |
| }; |
| CameraDeviceImpl.this.mDeviceHandler.post(r); |
| break; |
| case ERROR_CAMERA_REQUEST: |
| case ERROR_CAMERA_RESULT: |
| case ERROR_CAMERA_BUFFER: |
| onCaptureErrorLocked(errorCode, resultExtras); |
| break; |
| } |
| } |
| } |
| |
| @Override |
| public void onDeviceIdle() { |
| if (DEBUG) { |
| Log.d(TAG, "Camera now idle"); |
| } |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| if (!CameraDeviceImpl.this.mIdle) { |
| CameraDeviceImpl.this.mDeviceHandler.post(mCallOnIdle); |
| } |
| CameraDeviceImpl.this.mIdle = true; |
| } |
| } |
| |
| @Override |
| public void onCaptureStarted(final CaptureResultExtras resultExtras, final long timestamp) { |
| int requestId = resultExtras.getRequestId(); |
| final long frameNumber = resultExtras.getFrameNumber(); |
| |
| if (DEBUG) { |
| Log.d(TAG, "Capture started for id " + requestId + " frame number " + frameNumber); |
| } |
| final CaptureCallbackHolder holder; |
| |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| // Get the callback for this frame ID, if there is one |
| holder = CameraDeviceImpl.this.mCaptureCallbackMap.get(requestId); |
| |
| if (holder == null) { |
| return; |
| } |
| |
| if (isClosed()) return; |
| |
| // Dispatch capture start notice |
| holder.getHandler().post( |
| new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()) { |
| holder.getCallback().onCaptureStarted( |
| CameraDeviceImpl.this, |
| holder.getRequest(resultExtras.getSubsequenceId()), |
| timestamp, frameNumber); |
| } |
| } |
| }); |
| |
| } |
| } |
| |
| @Override |
| public void onResultReceived(CameraMetadataNative result, |
| CaptureResultExtras resultExtras) throws RemoteException { |
| |
| int requestId = resultExtras.getRequestId(); |
| long frameNumber = resultExtras.getFrameNumber(); |
| |
| if (DEBUG) { |
| Log.v(TAG, "Received result frame " + frameNumber + " for id " |
| + requestId); |
| } |
| |
| synchronized(mInterfaceLock) { |
| if (mRemoteDevice == null) return; // Camera already closed |
| |
| // TODO: Handle CameraCharacteristics access from CaptureResult correctly. |
| result.set(CameraCharacteristics.LENS_INFO_SHADING_MAP_SIZE, |
| getCharacteristics().get(CameraCharacteristics.LENS_INFO_SHADING_MAP_SIZE)); |
| |
| final CaptureCallbackHolder holder = |
| CameraDeviceImpl.this.mCaptureCallbackMap.get(requestId); |
| |
| boolean isPartialResult = |
| (resultExtras.getPartialResultCount() < mTotalPartialCount); |
| |
| // Check if we have a callback for this |
| if (holder == null) { |
| if (DEBUG) { |
| Log.d(TAG, |
| "holder is null, early return at frame " |
| + frameNumber); |
| } |
| |
| mFrameNumberTracker.updateTracker(frameNumber, /*result*/null, isPartialResult); |
| |
| return; |
| } |
| |
| if (isClosed()) { |
| if (DEBUG) { |
| Log.d(TAG, |
| "camera is closed, early return at frame " |
| + frameNumber); |
| } |
| |
| mFrameNumberTracker.updateTracker(frameNumber, /*result*/null, isPartialResult); |
| return; |
| } |
| |
| final CaptureRequest request = holder.getRequest(resultExtras.getSubsequenceId()); |
| |
| Runnable resultDispatch = null; |
| |
| CaptureResult finalResult; |
| |
| // Either send a partial result or the final capture completed result |
| if (isPartialResult) { |
| final CaptureResult resultAsCapture = |
| new CaptureResult(result, request, resultExtras); |
| |
| // Partial result |
| resultDispatch = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()){ |
| holder.getCallback().onCaptureProgressed( |
| CameraDeviceImpl.this, |
| request, |
| resultAsCapture); |
| } |
| } |
| }; |
| |
| finalResult = resultAsCapture; |
| } else { |
| List<CaptureResult> partialResults = |
| mFrameNumberTracker.popPartialResults(frameNumber); |
| |
| final TotalCaptureResult resultAsCapture = |
| new TotalCaptureResult(result, request, resultExtras, partialResults); |
| |
| // Final capture result |
| resultDispatch = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()){ |
| holder.getCallback().onCaptureCompleted( |
| CameraDeviceImpl.this, |
| request, |
| resultAsCapture); |
| } |
| } |
| }; |
| |
| finalResult = resultAsCapture; |
| } |
| |
| holder.getHandler().post(resultDispatch); |
| |
| // Collect the partials for a total result; or mark the frame as totally completed |
| mFrameNumberTracker.updateTracker(frameNumber, finalResult, isPartialResult); |
| |
| // Fire onCaptureSequenceCompleted |
| if (!isPartialResult) { |
| checkAndFireSequenceComplete(); |
| } |
| } |
| } |
| |
| /** |
| * Called by onDeviceError for handling single-capture failures. |
| */ |
| private void onCaptureErrorLocked(int errorCode, CaptureResultExtras resultExtras) { |
| |
| final int requestId = resultExtras.getRequestId(); |
| final int subsequenceId = resultExtras.getSubsequenceId(); |
| final long frameNumber = resultExtras.getFrameNumber(); |
| final CaptureCallbackHolder holder = |
| CameraDeviceImpl.this.mCaptureCallbackMap.get(requestId); |
| |
| final CaptureRequest request = holder.getRequest(subsequenceId); |
| |
| // No way to report buffer errors right now |
| if (errorCode == ERROR_CAMERA_BUFFER) { |
| Log.e(TAG, String.format("Lost output buffer reported for frame %d", frameNumber)); |
| return; |
| } |
| |
| boolean mayHaveBuffers = (errorCode == ERROR_CAMERA_RESULT); |
| |
| // This is only approximate - exact handling needs the camera service and HAL to |
| // disambiguate between request failures to due abort and due to real errors. |
| // For now, assume that if the session believes we're mid-abort, then the error |
| // is due to abort. |
| int reason = (mCurrentSession != null && mCurrentSession.isAborting()) ? |
| CaptureFailure.REASON_FLUSHED : |
| CaptureFailure.REASON_ERROR; |
| |
| final CaptureFailure failure = new CaptureFailure( |
| request, |
| reason, |
| /*dropped*/ mayHaveBuffers, |
| requestId, |
| frameNumber); |
| |
| Runnable failureDispatch = new Runnable() { |
| @Override |
| public void run() { |
| if (!CameraDeviceImpl.this.isClosed()){ |
| holder.getCallback().onCaptureFailed( |
| CameraDeviceImpl.this, |
| request, |
| failure); |
| } |
| } |
| }; |
| holder.getHandler().post(failureDispatch); |
| |
| // Fire onCaptureSequenceCompleted if appropriate |
| if (DEBUG) { |
| Log.v(TAG, String.format("got error frame %d", frameNumber)); |
| } |
| mFrameNumberTracker.updateTracker(frameNumber, /*error*/true); |
| checkAndFireSequenceComplete(); |
| } |
| |
| } // public class CameraDeviceCallbacks |
| |
| /** |
| * Default handler management. |
| * |
| * <p> |
| * If handler is null, get the current thread's |
| * Looper to create a Handler with. If no looper exists, throw {@code IllegalArgumentException}. |
| * </p> |
| */ |
| static Handler checkHandler(Handler handler) { |
| if (handler == null) { |
| Looper looper = Looper.myLooper(); |
| if (looper == null) { |
| throw new IllegalArgumentException( |
| "No handler given, and current thread has no looper!"); |
| } |
| handler = new Handler(looper); |
| } |
| return handler; |
| } |
| |
| /** |
| * Default handler management, conditional on there being a callback. |
| * |
| * <p>If the callback isn't null, check the handler, otherwise pass it through.</p> |
| */ |
| static <T> Handler checkHandler(Handler handler, T callback) { |
| if (callback != null) { |
| return checkHandler(handler); |
| } |
| return handler; |
| } |
| |
| private void checkIfCameraClosedOrInError() throws CameraAccessException { |
| if (mInError) { |
| throw new CameraAccessException(CameraAccessException.CAMERA_ERROR, |
| "The camera device has encountered a serious error"); |
| } |
| if (mRemoteDevice == null) { |
| throw new IllegalStateException("CameraDevice was already closed"); |
| } |
| } |
| |
| /** Whether the camera device has started to close (may not yet have finished) */ |
| private boolean isClosed() { |
| return mClosing; |
| } |
| |
| private CameraCharacteristics getCharacteristics() { |
| return mCharacteristics; |
| } |
| } |