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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.camera.one.v2.errorhandling;
     18 
     19 import android.hardware.camera2.CameraAccessException;
     20 
     21 import com.android.camera.debug.Log;
     22 import com.android.camera.debug.Logger;
     23 import com.android.camera.one.v2.camera2proxy.CameraCaptureSessionClosedException;
     24 import com.android.camera.one.v2.camera2proxy.CameraCaptureSessionProxy;
     25 import com.android.camera.one.v2.commands.CameraCommandExecutor;
     26 import com.android.camera.stats.UsageStatistics;
     27 import com.google.common.logging.eventprotos;
     28 
     29 import javax.annotation.ParametersAreNonnullByDefault;
     30 
     31 /**
     32  * Resets camera usage by calling abortCaptures(), flushing (interrupting) any
     33  * currently-executing camera commands, and restarting the preview.
     34  * <p>
     35  * Workaround for Bug: 19061883
     36  */
     37 @ParametersAreNonnullByDefault
     38 final class FastCameraReset implements FailureHandler {
     39     private final Logger mLog;
     40     private final CameraCaptureSessionProxy mCaptureSession;
     41     private final CameraCommandExecutor mCommandExecutor;
     42     private final Runnable mPreviewStarter;
     43     private final UsageStatistics mUsageStats;
     44 
     45     FastCameraReset(Logger.Factory logFactory, CameraCaptureSessionProxy captureSession,
     46             CameraCommandExecutor commandExecutor, Runnable previewStarter,
     47             UsageStatistics usageStats) {
     48         mLog = logFactory.create(new Log.Tag("FastCameraReset"));
     49         mCaptureSession = captureSession;
     50         mCommandExecutor = commandExecutor;
     51         mPreviewStarter = previewStarter;
     52         mUsageStats = usageStats;
     53     }
     54 
     55     @Override
     56     public void run() {
     57         // TODO: Replace UNKNOWN_REASON with enum for this error.
     58         mUsageStats.cameraFailure(eventprotos.CameraFailure.FailureReason.UNKNOWN_REASON,
     59                 "api2_repeated_failure", UsageStatistics.NONE, UsageStatistics.NONE);
     60 
     61         mLog.w("beginning reset()");
     62         try {
     63             mLog.w("abortCaptures()");
     64             mCaptureSession.abortCaptures();
     65         } catch (CameraAccessException e) {
     66             e.printStackTrace();
     67         } catch (CameraCaptureSessionClosedException e) {
     68             e.printStackTrace();
     69         }
     70         mLog.w("flushing existing camera commands");
     71         mCommandExecutor.flush();
     72         mLog.w("restarting the preview");
     73         mPreviewStarter.run();
     74         mLog.w("finished reset()");
     75     }
     76 }
     77