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      1 /*
      2  * Copyright (C) 2014 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.photo;
     18 
     19 import android.hardware.camera2.CameraAccessException;
     20 
     21 import com.android.camera.app.OrientationManager;
     22 import com.android.camera.async.MainThread;
     23 import com.android.camera.async.Updatable;
     24 import com.android.camera.one.OneCamera;
     25 import com.android.camera.one.v2.camera2proxy.CameraCaptureSessionClosedException;
     26 import com.android.camera.one.v2.commands.CameraCommand;
     27 import com.android.camera.one.v2.commands.CameraCommandExecutor;
     28 import com.android.camera.one.v2.core.ResourceAcquisitionFailedException;
     29 import com.android.camera.one.v2.imagesaver.ImageSaver;
     30 import com.android.camera.session.CaptureSession;
     31 import com.google.common.base.Objects;
     32 
     33 class PictureTakerImpl implements PictureTaker {
     34     private final MainThread mMainExecutor;
     35     private final CameraCommandExecutor mCameraCommandExecutor;
     36     private final ImageSaver.Builder mImageSaverBuilder;
     37     private final ImageCaptureCommand mCommand;
     38 
     39     public PictureTakerImpl(MainThread mainExecutor, CameraCommandExecutor cameraCommandExecutor,
     40             ImageSaver.Builder imageSaverBuilder, ImageCaptureCommand command) {
     41         mMainExecutor = mainExecutor;
     42         mCameraCommandExecutor = cameraCommandExecutor;
     43         mImageSaverBuilder = imageSaverBuilder;
     44         mCommand = command;
     45     }
     46 
     47     private final class PictureTakerCommand implements CameraCommand {
     48         private final Updatable<Void> mImageExposureCallback;
     49         private final ImageSaver mImageSaver;
     50         private final CaptureSession mSession;
     51 
     52         private PictureTakerCommand(Updatable<Void> imageExposureCallback,
     53                 ImageSaver imageSaver,
     54                 CaptureSession session) {
     55             mImageExposureCallback = imageExposureCallback;
     56             mImageSaver = imageSaver;
     57             mSession = session;
     58         }
     59 
     60         @Override
     61         public void run() throws InterruptedException, CameraAccessException,
     62                 CameraCaptureSessionClosedException, ResourceAcquisitionFailedException {
     63             try {
     64                 mCommand.run(mImageExposureCallback, mImageSaver);
     65             } catch (Exception e) {
     66                 mSession.cancel();
     67                 throw e;
     68             }
     69         }
     70 
     71         @Override
     72         public String toString() {
     73             return Objects.toStringHelper(this)
     74                     .add("command", mCommand)
     75                     .toString();
     76         }
     77     }
     78 
     79     @Override
     80     public void takePicture(OneCamera.PhotoCaptureParameters params, final CaptureSession session) {
     81         OneCamera.PictureCallback pictureCallback = params.callback;
     82 
     83         // Wrap the pictureCallback with a thread-safe adapter which guarantees
     84         // that they are always invoked on the main thread.
     85         PictureCallbackAdapter pictureCallbackAdapter =
     86                 new PictureCallbackAdapter(pictureCallback, mMainExecutor);
     87 
     88         final Updatable<Void> imageExposureCallback =
     89                 pictureCallbackAdapter.provideQuickExposeUpdatable();
     90 
     91         final ImageSaver imageSaver = mImageSaverBuilder.build(
     92                 params.saverCallback,
     93                 OrientationManager.DeviceOrientation.from(params.orientation),
     94                 session);
     95 
     96         mCameraCommandExecutor.execute(new PictureTakerCommand(
     97                 imageExposureCallback, imageSaver, session));
     98     }
     99 }
    100