| /* |
| * Copyright (C) 2014 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 android.hardware.camera2.CameraAccessException; |
| import android.hardware.camera2.CameraCaptureSession; |
| import android.hardware.camera2.CameraDevice; |
| import android.hardware.camera2.CaptureRequest; |
| import android.hardware.camera2.ICameraDeviceUser; |
| import android.hardware.camera2.params.OutputConfiguration; |
| import android.hardware.camera2.utils.TaskDrainer; |
| import android.hardware.camera2.utils.TaskSingleDrainer; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.util.Log; |
| import android.view.Surface; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.Executor; |
| |
| import static android.hardware.camera2.impl.CameraDeviceImpl.checkHandler; |
| import static com.android.internal.util.Preconditions.*; |
| |
| public class CameraCaptureSessionImpl extends CameraCaptureSession |
| implements CameraCaptureSessionCore { |
| private static final String TAG = "CameraCaptureSession"; |
| private static final boolean DEBUG = false; |
| |
| /** Simple integer ID for session for debugging */ |
| private final int mId; |
| private final String mIdString; |
| |
| /** Input surface configured by native camera framework based on user-specified configuration */ |
| private final Surface mInput; |
| /** |
| * User-specified state callback, used for outgoing events; calls to this object will be |
| * automatically invoked via {@code mStateExecutor}. |
| */ |
| private final CameraCaptureSession.StateCallback mStateCallback; |
| /** User-specified state executor used for outgoing state callback events */ |
| private final Executor mStateExecutor; |
| |
| /** Internal camera device; used to translate calls into existing deprecated API */ |
| private final android.hardware.camera2.impl.CameraDeviceImpl mDeviceImpl; |
| /** Internal executor; used for all incoming events to preserve total order */ |
| private final Executor mDeviceExecutor; |
| |
| /** Drain Sequence IDs which have been queued but not yet finished with aborted/completed */ |
| private final TaskDrainer<Integer> mSequenceDrainer; |
| /** Drain state transitions from ACTIVE -> IDLE */ |
| private final TaskSingleDrainer mIdleDrainer; |
| /** Drain state transitions from BUSY -> IDLE */ |
| private final TaskSingleDrainer mAbortDrainer; |
| |
| /** This session is closed; all further calls will throw ISE */ |
| private boolean mClosed = false; |
| /** This session failed to be configured successfully */ |
| private final boolean mConfigureSuccess; |
| /** Do not unconfigure if this is set; another session will overwrite configuration */ |
| private boolean mSkipUnconfigure = false; |
| |
| /** Is the session in the process of aborting? Pay attention to BUSY->IDLE transitions. */ |
| private volatile boolean mAborting; |
| |
| /** |
| * Create a new CameraCaptureSession. |
| * |
| * <p>The camera device must already be in the {@code IDLE} state when this is invoked. |
| * There must be no pending actions |
| * (e.g. no pending captures, no repeating requests, no flush).</p> |
| */ |
| CameraCaptureSessionImpl(int id, Surface input, |
| CameraCaptureSession.StateCallback callback, Executor stateExecutor, |
| android.hardware.camera2.impl.CameraDeviceImpl deviceImpl, |
| Executor deviceStateExecutor, boolean configureSuccess) { |
| if (callback == null) { |
| throw new IllegalArgumentException("callback must not be null"); |
| } |
| |
| mId = id; |
| mIdString = String.format("Session %d: ", mId); |
| |
| mInput = input; |
| mStateExecutor = checkNotNull(stateExecutor, "stateExecutor must not be null"); |
| mStateCallback = createUserStateCallbackProxy(mStateExecutor, callback); |
| |
| mDeviceExecutor = checkNotNull(deviceStateExecutor, |
| "deviceStateExecutor must not be null"); |
| mDeviceImpl = checkNotNull(deviceImpl, "deviceImpl must not be null"); |
| |
| /* |
| * Use the same handler as the device's StateCallback for all the internal coming events |
| * |
| * This ensures total ordering between CameraDevice.StateCallback and |
| * CameraDeviceImpl.CaptureCallback events. |
| */ |
| mSequenceDrainer = new TaskDrainer<>(mDeviceExecutor, new SequenceDrainListener(), |
| /*name*/"seq"); |
| mIdleDrainer = new TaskSingleDrainer(mDeviceExecutor, new IdleDrainListener(), |
| /*name*/"idle"); |
| mAbortDrainer = new TaskSingleDrainer(mDeviceExecutor, new AbortDrainListener(), |
| /*name*/"abort"); |
| |
| // CameraDevice should call configureOutputs and have it finish before constructing us |
| |
| if (configureSuccess) { |
| mStateCallback.onConfigured(this); |
| if (DEBUG) Log.v(TAG, mIdString + "Created session successfully"); |
| mConfigureSuccess = true; |
| } else { |
| mStateCallback.onConfigureFailed(this); |
| mClosed = true; // do not fire any other callbacks, do not allow any other work |
| Log.e(TAG, mIdString + "Failed to create capture session; configuration failed"); |
| mConfigureSuccess = false; |
| } |
| } |
| |
| @Override |
| public CameraDevice getDevice() { |
| return mDeviceImpl; |
| } |
| |
| @Override |
| public void prepare(Surface surface) throws CameraAccessException { |
| mDeviceImpl.prepare(surface); |
| } |
| |
| @Override |
| public void prepare(int maxCount, Surface surface) throws CameraAccessException { |
| mDeviceImpl.prepare(maxCount, surface); |
| } |
| |
| @Override |
| public void tearDown(Surface surface) throws CameraAccessException { |
| mDeviceImpl.tearDown(surface); |
| } |
| |
| @Override |
| public void finalizeOutputConfigurations( |
| List<OutputConfiguration> outputConfigs) throws CameraAccessException { |
| mDeviceImpl.finalizeOutputConfigs(outputConfigs); |
| } |
| |
| @Override |
| public int capture(CaptureRequest request, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| checkCaptureRequest(request); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| handler = checkHandler(handler, callback); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "capture - request " + request + ", callback " + callback + |
| " handler " + handler); |
| } |
| |
| return addPendingSequence(mDeviceImpl.capture(request, |
| createCaptureCallbackProxy(handler, callback), mDeviceExecutor)); |
| } |
| } |
| |
| @Override |
| public int captureSingleRequest(CaptureRequest request, Executor executor, |
| CaptureCallback callback) throws CameraAccessException { |
| if (executor == null) { |
| throw new IllegalArgumentException("executor must not be null"); |
| } else if (callback == null) { |
| throw new IllegalArgumentException("callback must not be null"); |
| } |
| checkCaptureRequest(request); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| executor = CameraDeviceImpl.checkExecutor(executor, callback); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "capture - request " + request + ", callback " + callback + |
| " executor " + executor); |
| } |
| |
| return addPendingSequence(mDeviceImpl.capture(request, |
| createCaptureCallbackProxyWithExecutor(executor, callback), mDeviceExecutor)); |
| } |
| } |
| |
| private void checkCaptureRequest(CaptureRequest request) { |
| if (request == null) { |
| throw new IllegalArgumentException("request must not be null"); |
| } else if (request.isReprocess() && !isReprocessable()) { |
| throw new IllegalArgumentException("this capture session cannot handle reprocess " + |
| "requests"); |
| } else if (request.isReprocess() && request.getReprocessableSessionId() != mId) { |
| throw new IllegalArgumentException("capture request was created for another session"); |
| } |
| } |
| |
| @Override |
| public int captureBurst(List<CaptureRequest> requests, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| checkCaptureRequests(requests); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| handler = checkHandler(handler, callback); |
| |
| if (DEBUG) { |
| CaptureRequest[] requestArray = requests.toArray(new CaptureRequest[0]); |
| Log.v(TAG, mIdString + "captureBurst - requests " + Arrays.toString(requestArray) + |
| ", callback " + callback + " handler " + handler); |
| } |
| |
| return addPendingSequence(mDeviceImpl.captureBurst(requests, |
| createCaptureCallbackProxy(handler, callback), mDeviceExecutor)); |
| } |
| } |
| |
| @Override |
| public int captureBurstRequests(List<CaptureRequest> requests, Executor executor, |
| CaptureCallback callback) throws CameraAccessException { |
| if (executor == null) { |
| throw new IllegalArgumentException("executor must not be null"); |
| } else if (callback == null) { |
| throw new IllegalArgumentException("callback must not be null"); |
| } |
| checkCaptureRequests(requests); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| executor = CameraDeviceImpl.checkExecutor(executor, callback); |
| |
| if (DEBUG) { |
| CaptureRequest[] requestArray = requests.toArray(new CaptureRequest[0]); |
| Log.v(TAG, mIdString + "captureBurst - requests " + Arrays.toString(requestArray) + |
| ", callback " + callback + " executor " + executor); |
| } |
| |
| return addPendingSequence(mDeviceImpl.captureBurst(requests, |
| createCaptureCallbackProxyWithExecutor(executor, callback), mDeviceExecutor)); |
| } |
| } |
| |
| private void checkCaptureRequests(List<CaptureRequest> requests) { |
| if (requests == null) { |
| throw new IllegalArgumentException("Requests must not be null"); |
| } else if (requests.isEmpty()) { |
| throw new IllegalArgumentException("Requests must have at least one element"); |
| } |
| |
| for (CaptureRequest request : requests) { |
| if (request.isReprocess()) { |
| if (!isReprocessable()) { |
| throw new IllegalArgumentException("This capture session cannot handle " + |
| "reprocess requests"); |
| } else if (request.getReprocessableSessionId() != mId) { |
| throw new IllegalArgumentException("Capture request was created for another " + |
| "session"); |
| } |
| } |
| } |
| |
| } |
| |
| @Override |
| public int setRepeatingRequest(CaptureRequest request, CaptureCallback callback, |
| Handler handler) throws CameraAccessException { |
| checkRepeatingRequest(request); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| handler = checkHandler(handler, callback); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "setRepeatingRequest - request " + request + ", callback " + |
| callback + " handler" + " " + handler); |
| } |
| |
| return addPendingSequence(mDeviceImpl.setRepeatingRequest(request, |
| createCaptureCallbackProxy(handler, callback), mDeviceExecutor)); |
| } |
| } |
| |
| @Override |
| public int setSingleRepeatingRequest(CaptureRequest request, Executor executor, |
| CaptureCallback callback) throws CameraAccessException { |
| if (executor == null) { |
| throw new IllegalArgumentException("executor must not be null"); |
| } else if (callback == null) { |
| throw new IllegalArgumentException("callback must not be null"); |
| } |
| checkRepeatingRequest(request); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| executor = CameraDeviceImpl.checkExecutor(executor, callback); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "setRepeatingRequest - request " + request + ", callback " + |
| callback + " executor" + " " + executor); |
| } |
| |
| return addPendingSequence(mDeviceImpl.setRepeatingRequest(request, |
| createCaptureCallbackProxyWithExecutor(executor, callback), mDeviceExecutor)); |
| } |
| } |
| |
| private void checkRepeatingRequest(CaptureRequest request) { |
| if (request == null) { |
| throw new IllegalArgumentException("request must not be null"); |
| } else if (request.isReprocess()) { |
| throw new IllegalArgumentException("repeating reprocess requests are not supported"); |
| } |
| } |
| |
| @Override |
| public int setRepeatingBurst(List<CaptureRequest> requests, |
| CaptureCallback callback, Handler handler) throws CameraAccessException { |
| checkRepeatingRequests(requests); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| handler = checkHandler(handler, callback); |
| |
| if (DEBUG) { |
| CaptureRequest[] requestArray = requests.toArray(new CaptureRequest[0]); |
| Log.v(TAG, mIdString + "setRepeatingBurst - requests " + |
| Arrays.toString(requestArray) + ", callback " + callback + |
| " handler" + "" + handler); |
| } |
| |
| return addPendingSequence(mDeviceImpl.setRepeatingBurst(requests, |
| createCaptureCallbackProxy(handler, callback), mDeviceExecutor)); |
| } |
| } |
| |
| @Override |
| public int setRepeatingBurstRequests(List<CaptureRequest> requests, Executor executor, |
| CaptureCallback callback) throws CameraAccessException { |
| if (executor == null) { |
| throw new IllegalArgumentException("executor must not be null"); |
| } else if (callback == null) { |
| throw new IllegalArgumentException("callback must not be null"); |
| } |
| checkRepeatingRequests(requests); |
| |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| executor = CameraDeviceImpl.checkExecutor(executor, callback); |
| |
| if (DEBUG) { |
| CaptureRequest[] requestArray = requests.toArray(new CaptureRequest[0]); |
| Log.v(TAG, mIdString + "setRepeatingBurst - requests " + |
| Arrays.toString(requestArray) + ", callback " + callback + |
| " executor" + "" + executor); |
| } |
| |
| return addPendingSequence(mDeviceImpl.setRepeatingBurst(requests, |
| createCaptureCallbackProxyWithExecutor(executor, callback), mDeviceExecutor)); |
| } |
| } |
| |
| private void checkRepeatingRequests(List<CaptureRequest> requests) { |
| if (requests == null) { |
| throw new IllegalArgumentException("requests must not be null"); |
| } else if (requests.isEmpty()) { |
| throw new IllegalArgumentException("requests must have at least one element"); |
| } |
| |
| for (CaptureRequest r : requests) { |
| if (r.isReprocess()) { |
| throw new IllegalArgumentException("repeating reprocess burst requests are not " + |
| "supported"); |
| } |
| } |
| } |
| |
| @Override |
| public void stopRepeating() throws CameraAccessException { |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "stopRepeating"); |
| } |
| |
| mDeviceImpl.stopRepeating(); |
| } |
| } |
| |
| @Override |
| public void abortCaptures() throws CameraAccessException { |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "abortCaptures"); |
| } |
| |
| if (mAborting) { |
| Log.w(TAG, mIdString + "abortCaptures - Session is already aborting; doing nothing"); |
| return; |
| } |
| |
| mAborting = true; |
| mAbortDrainer.taskStarted(); |
| |
| mDeviceImpl.flush(); |
| // The next BUSY -> IDLE set of transitions will mark the end of the abort. |
| } |
| } |
| |
| @Override |
| public void updateOutputConfiguration(OutputConfiguration config) |
| throws CameraAccessException { |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| checkNotClosed(); |
| |
| if (DEBUG) { |
| Log.v(TAG, mIdString + "updateOutputConfiguration"); |
| } |
| |
| mDeviceImpl.updateOutputConfiguration(config); |
| } |
| } |
| |
| @Override |
| public boolean isReprocessable() { |
| return mInput != null; |
| } |
| |
| @Override |
| public Surface getInputSurface() { |
| return mInput; |
| } |
| |
| /** |
| * Replace this session with another session. |
| * |
| * <p>This is an optimization to avoid unconfiguring and then immediately having to |
| * reconfigure again.</p> |
| * |
| * <p>The semantics are identical to {@link #close}, except that unconfiguring will be skipped. |
| * <p> |
| * |
| * <p>After this call completes, the session will not call any further methods on the camera |
| * device.</p> |
| * |
| * @see CameraCaptureSession#close |
| */ |
| @Override |
| public void replaceSessionClose() { |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| /* |
| * In order for creating new sessions to be fast, the new session should be created |
| * before the old session is closed. |
| * |
| * Otherwise the old session will always unconfigure if there is no new session to |
| * replace it. |
| * |
| * Unconfiguring could add hundreds of milliseconds of delay. We could race and attempt |
| * to skip unconfigure if a new session is created before the captures are all drained, |
| * but this would introduce nondeterministic behavior. |
| */ |
| |
| if (DEBUG) Log.v(TAG, mIdString + "replaceSessionClose"); |
| |
| // Set up fast shutdown. Possible alternative paths: |
| // - This session is active, so close() below starts the shutdown drain |
| // - This session is mid-shutdown drain, and hasn't yet reached the idle drain listener. |
| // - This session is already closed and has executed the idle drain listener, and |
| // configureOutputsChecked(null) has already been called. |
| // |
| // Do not call configureOutputsChecked(null) going forward, since it would race with the |
| // configuration for the new session. If it was already called, then we don't care, |
| // since it won't get called again. |
| mSkipUnconfigure = true; |
| close(); |
| } |
| } |
| |
| @Override |
| public void close() { |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| if (mClosed) { |
| if (DEBUG) Log.v(TAG, mIdString + "close - reentering"); |
| return; |
| } |
| |
| if (DEBUG) Log.v(TAG, mIdString + "close - first time"); |
| |
| mClosed = true; |
| |
| /* |
| * Flush out any repeating request. Since camera is closed, no new requests |
| * can be queued, and eventually the entire request queue will be drained. |
| * |
| * If the camera device was already closed, short circuit and do nothing; since |
| * no more internal device callbacks will fire anyway. |
| * |
| * Otherwise, once stopRepeating is done, wait for camera to idle, then unconfigure |
| * the camera. Once that's done, fire #onClosed. |
| */ |
| try { |
| mDeviceImpl.stopRepeating(); |
| } catch (IllegalStateException e) { |
| // OK: Camera device may already be closed, nothing else to do |
| |
| // TODO: Fire onClosed anytime we get the device onClosed or the ISE? |
| // or just suppress the ISE only and rely onClosed. |
| // Also skip any of the draining work if this is already closed. |
| |
| // Short-circuit; queue callback immediately and return |
| mStateCallback.onClosed(this); |
| return; |
| } catch (CameraAccessException e) { |
| // OK: close does not throw checked exceptions. |
| Log.e(TAG, mIdString + "Exception while stopping repeating: ", e); |
| |
| // TODO: call onError instead of onClosed if this happens |
| } |
| |
| // If no sequences are pending, fire #onClosed immediately |
| mSequenceDrainer.beginDrain(); |
| } |
| if (mInput != null) { |
| mInput.release(); |
| } |
| } |
| |
| /** |
| * Whether currently in mid-abort. |
| * |
| * <p>This is used by the implementation to set the capture failure |
| * reason, in lieu of more accurate error codes from the camera service. |
| * Unsynchronized to avoid deadlocks between simultaneous session->device, |
| * device->session calls.</p> |
| * |
| */ |
| @Override |
| public boolean isAborting() { |
| return mAborting; |
| } |
| |
| /** |
| * Post calls into a CameraCaptureSession.StateCallback to the user-specified {@code executor}. |
| */ |
| private StateCallback createUserStateCallbackProxy(Executor executor, StateCallback callback) { |
| return new CallbackProxies.SessionStateCallbackProxy(executor, callback); |
| } |
| |
| /** |
| * Forward callbacks from |
| * CameraDeviceImpl.CaptureCallback to the CameraCaptureSession.CaptureCallback. |
| * |
| * <p>When a capture sequence finishes, update the pending checked sequences set.</p> |
| */ |
| @SuppressWarnings("deprecation") |
| private CameraDeviceImpl.CaptureCallback createCaptureCallbackProxy( |
| Handler handler, CaptureCallback callback) { |
| final Executor executor = (callback != null) ? CameraDeviceImpl.checkAndWrapHandler( |
| handler) : null; |
| |
| return createCaptureCallbackProxyWithExecutor(executor, callback); |
| } |
| |
| private CameraDeviceImpl.CaptureCallback createCaptureCallbackProxyWithExecutor( |
| Executor executor, CaptureCallback callback) { |
| return new CameraDeviceImpl.CaptureCallback() { |
| @Override |
| public void onCaptureStarted(CameraDevice camera, |
| CaptureRequest request, long timestamp, long frameNumber) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureStarted( |
| CameraCaptureSessionImpl.this, request, timestamp, |
| frameNumber)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| @Override |
| public void onCapturePartial(CameraDevice camera, |
| CaptureRequest request, android.hardware.camera2.CaptureResult result) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCapturePartial( |
| CameraCaptureSessionImpl.this, request, result)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| @Override |
| public void onCaptureProgressed(CameraDevice camera, |
| CaptureRequest request, android.hardware.camera2.CaptureResult partialResult) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureProgressed( |
| CameraCaptureSessionImpl.this, request, partialResult)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| @Override |
| public void onCaptureCompleted(CameraDevice camera, |
| CaptureRequest request, android.hardware.camera2.TotalCaptureResult result) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureCompleted( |
| CameraCaptureSessionImpl.this, request, result)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| @Override |
| public void onCaptureFailed(CameraDevice camera, |
| CaptureRequest request, android.hardware.camera2.CaptureFailure failure) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureFailed( |
| CameraCaptureSessionImpl.this, request, failure)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| |
| @Override |
| public void onCaptureSequenceCompleted(CameraDevice camera, |
| int sequenceId, long frameNumber) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureSequenceCompleted( |
| CameraCaptureSessionImpl.this, sequenceId, frameNumber)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| finishPendingSequence(sequenceId); |
| } |
| |
| @Override |
| public void onCaptureSequenceAborted(CameraDevice camera, |
| int sequenceId) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureSequenceAborted( |
| CameraCaptureSessionImpl.this, sequenceId)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| finishPendingSequence(sequenceId); |
| } |
| |
| @Override |
| public void onCaptureBufferLost(CameraDevice camera, |
| CaptureRequest request, Surface target, long frameNumber) { |
| if ((callback != null) && (executor != null)) { |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onCaptureBufferLost( |
| CameraCaptureSessionImpl.this, request, target, frameNumber)); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| } |
| }; |
| } |
| |
| /** |
| * |
| * Create an internal state callback, to be invoked on the mDeviceExecutor |
| * |
| * <p>It has a few behaviors: |
| * <ul> |
| * <li>Convert device state changes into session state changes. |
| * <li>Keep track of async tasks that the session began (idle, abort). |
| * </ul> |
| * </p> |
| * */ |
| @Override |
| public CameraDeviceImpl.StateCallbackKK getDeviceStateCallback() { |
| final CameraCaptureSession session = this; |
| final Object interfaceLock = mDeviceImpl.mInterfaceLock; |
| |
| |
| return new CameraDeviceImpl.StateCallbackKK() { |
| private boolean mBusy = false; |
| private boolean mActive = false; |
| |
| @Override |
| public void onOpened(CameraDevice camera) { |
| throw new AssertionError("Camera must already be open before creating a session"); |
| } |
| |
| @Override |
| public void onDisconnected(CameraDevice camera) { |
| if (DEBUG) Log.v(TAG, mIdString + "onDisconnected"); |
| close(); |
| } |
| |
| @Override |
| public void onError(CameraDevice camera, int error) { |
| // Should not be reached, handled by device code |
| Log.wtf(TAG, mIdString + "Got device error " + error); |
| } |
| |
| @Override |
| public void onActive(CameraDevice camera) { |
| mIdleDrainer.taskStarted(); |
| mActive = true; |
| |
| if (DEBUG) Log.v(TAG, mIdString + "onActive"); |
| mStateCallback.onActive(session); |
| } |
| |
| @Override |
| public void onIdle(CameraDevice camera) { |
| boolean isAborting; |
| if (DEBUG) Log.v(TAG, mIdString + "onIdle"); |
| |
| synchronized (interfaceLock) { |
| isAborting = mAborting; |
| } |
| |
| /* |
| * Check which states we transitioned through: |
| * |
| * (ACTIVE -> IDLE) |
| * (BUSY -> IDLE) |
| * |
| * Note that this is also legal: |
| * (ACTIVE -> BUSY -> IDLE) |
| * |
| * and mark those tasks as finished |
| */ |
| if (mBusy && isAborting) { |
| mAbortDrainer.taskFinished(); |
| |
| synchronized (interfaceLock) { |
| mAborting = false; |
| } |
| } |
| |
| if (mActive) { |
| mIdleDrainer.taskFinished(); |
| } |
| |
| mBusy = false; |
| mActive = false; |
| |
| mStateCallback.onReady(session); |
| } |
| |
| @Override |
| public void onBusy(CameraDevice camera) { |
| mBusy = true; |
| |
| // TODO: Queue captures during abort instead of failing them |
| // since the app won't be able to distinguish the two actives |
| // Don't signal the application since there's no clean mapping here |
| if (DEBUG) Log.v(TAG, mIdString + "onBusy"); |
| } |
| |
| @Override |
| public void onUnconfigured(CameraDevice camera) { |
| if (DEBUG) Log.v(TAG, mIdString + "onUnconfigured"); |
| } |
| |
| @Override |
| public void onRequestQueueEmpty() { |
| if (DEBUG) Log.v(TAG, mIdString + "onRequestQueueEmpty"); |
| mStateCallback.onCaptureQueueEmpty(session); |
| } |
| |
| @Override |
| public void onSurfacePrepared(Surface surface) { |
| if (DEBUG) Log.v(TAG, mIdString + "onSurfacePrepared"); |
| mStateCallback.onSurfacePrepared(session, surface); |
| } |
| }; |
| |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| private void checkNotClosed() { |
| if (mClosed) { |
| throw new IllegalStateException( |
| "Session has been closed; further changes are illegal."); |
| } |
| } |
| |
| /** |
| * Notify the session that a pending capture sequence has just been queued. |
| * |
| * <p>During a shutdown/close, the session waits until all pending sessions are finished |
| * before taking any further steps to shut down itself.</p> |
| * |
| * @see #finishPendingSequence |
| */ |
| private int addPendingSequence(int sequenceId) { |
| mSequenceDrainer.taskStarted(sequenceId); |
| return sequenceId; |
| } |
| |
| /** |
| * Notify the session that a pending capture sequence is now finished. |
| * |
| * <p>During a shutdown/close, once all pending sequences finish, it is safe to |
| * close the camera further by unconfiguring and then firing {@code onClosed}.</p> |
| */ |
| private void finishPendingSequence(int sequenceId) { |
| try { |
| mSequenceDrainer.taskFinished(sequenceId); |
| } catch (IllegalStateException e) { |
| // Workaround for b/27870771 |
| Log.w(TAG, e.getMessage()); |
| } |
| } |
| |
| private class SequenceDrainListener implements TaskDrainer.DrainListener { |
| @Override |
| public void onDrained() { |
| /* |
| * No repeating request is set; and the capture queue has fully drained. |
| * |
| * If no captures were queued to begin with, and an abort was queued, |
| * it's still possible to get another BUSY before the last IDLE. |
| * |
| * If the camera is already "IDLE" and no aborts are pending, |
| * then the drain immediately finishes. |
| */ |
| if (DEBUG) Log.v(TAG, mIdString + "onSequenceDrained"); |
| |
| |
| // Fire session close as soon as all sequences are complete. |
| // We may still need to unconfigure the device, but a new session might be created |
| // past this point, and notifications would then stop to this instance. |
| mStateCallback.onClosed(CameraCaptureSessionImpl.this); |
| |
| // Fast path: A new capture session has replaced this one; don't wait for abort/idle |
| // as we won't get state updates any more anyway. |
| if (mSkipUnconfigure) { |
| return; |
| } |
| |
| mAbortDrainer.beginDrain(); |
| } |
| } |
| |
| private class AbortDrainListener implements TaskDrainer.DrainListener { |
| @Override |
| public void onDrained() { |
| if (DEBUG) Log.v(TAG, mIdString + "onAbortDrained"); |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| /* |
| * Any queued aborts have now completed. |
| * |
| * It's now safe to wait to receive the final "IDLE" event, as the camera device |
| * will no longer again transition to "ACTIVE" by itself. |
| * |
| * If the camera is already "IDLE", then the drain immediately finishes. |
| */ |
| |
| // Fast path: A new capture session has replaced this one; don't wait for idle |
| // as we won't get state updates any more anyway. |
| if (mSkipUnconfigure) { |
| return; |
| } |
| mIdleDrainer.beginDrain(); |
| } |
| } |
| } |
| |
| private class IdleDrainListener implements TaskDrainer.DrainListener { |
| @Override |
| public void onDrained() { |
| if (DEBUG) Log.v(TAG, mIdString + "onIdleDrained"); |
| |
| // Take device lock before session lock so that we can call back into device |
| // without causing a deadlock |
| synchronized (mDeviceImpl.mInterfaceLock) { |
| /* |
| * The device is now IDLE, and has settled. It will not transition to |
| * ACTIVE or BUSY again by itself. |
| * |
| * It's now safe to unconfigure the outputs. |
| * |
| * This operation is idempotent; a session will not be closed twice. |
| */ |
| if (DEBUG) |
| Log.v(TAG, mIdString + "Session drain complete, skip unconfigure: " + |
| mSkipUnconfigure); |
| |
| // Fast path: A new capture session has replaced this one; don't wait for idle |
| // as we won't get state updates any more anyway. |
| if (mSkipUnconfigure) { |
| return; |
| } |
| |
| // Final slow path: unconfigure the camera, no session has replaced us and |
| // everything is idle. |
| try { |
| // begin transition to unconfigured |
| mDeviceImpl.configureStreamsChecked(/*inputConfig*/null, /*outputs*/null, |
| /*operatingMode*/ ICameraDeviceUser.NORMAL_MODE, |
| /*sessionParams*/ null); |
| } catch (CameraAccessException e) { |
| // OK: do not throw checked exceptions. |
| Log.e(TAG, mIdString + "Exception while unconfiguring outputs: ", e); |
| |
| // TODO: call onError instead of onClosed if this happens |
| } catch (IllegalStateException e) { |
| // Camera is already closed, so nothing left to do |
| if (DEBUG) Log.v(TAG, mIdString + |
| "Camera was already closed or busy, skipping unconfigure"); |
| } |
| } |
| } |
| } |
| |
| } |
