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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.burst;
     18 
     19 import android.content.Context;
     20 import android.graphics.SurfaceTexture;
     21 import android.view.Surface;
     22 
     23 import com.android.camera.app.OrientationManager.DeviceOrientation;
     24 import com.android.camera.one.OneCamera.Facing;
     25 import com.android.camera.session.CaptureSession;
     26 
     27 /**
     28  * Factory for creating burst manager objects.
     29  */
     30 public class BurstFacadeFactory {
     31     private BurstFacadeFactory() {
     32         /* cannot be instantiated */
     33     }
     34 
     35     /**
     36      * An empty burst manager that is instantiated when burst is not supported.
     37      * <p>
     38      * It keeps a hold of the current surface texture so it can be used when
     39      * burst is not enabled.
     40      */
     41     public static class BurstFacadeStub implements BurstFacade {
     42         @Override
     43         public void startBurst(CaptureSession.CaptureSessionCreator captureSessionCreator,
     44                 DeviceOrientation deviceOrientation, Facing cameraFacing,
     45                 int imageOrientationDegrees) {
     46         }
     47 
     48         @Override
     49         public boolean stopBurst() {
     50             return false;
     51         }
     52 
     53         @Override
     54         public void initialize(SurfaceTexture surfaceTexture) {}
     55 
     56         @Override
     57         public void release() {}
     58 
     59         @Override
     60         public Surface getInputSurface() {
     61             return null;
     62         }
     63 
     64         @Override
     65         public void setBurstTaker(BurstTaker burstTaker) {}
     66     }
     67 
     68     /**
     69      * Creates and returns an instance of {@link BurstFacade}
     70      *
     71      * @param appContext the Android application context which is passes through
     72      *            to the burst controller.
     73      * @param orientationController for locking orientation when burst is running.
     74      * @param readyStateListener gets called when the ready state of Burst
     75      *            changes.
     76      */
     77     public static BurstFacade create(Context appContext,
     78             OrientationLockController orientationController,
     79             BurstReadyStateChangeListener readyStateListener) {
     80         if (BurstControllerImpl.isBurstModeSupported(appContext.getContentResolver())) {
     81             BurstFacade burstController = new BurstFacadeImpl(appContext, orientationController,
     82                     readyStateListener);
     83             ToastingBurstFacadeDecorator.BurstToaster toaster =
     84                     new ToastingBurstFacadeDecorator.BurstToaster(appContext);
     85             return new ToastingBurstFacadeDecorator(burstController, toaster);
     86         } else {
     87             // Burst is not supported return a stub instance.
     88             return new BurstFacadeStub();
     89         }
     90     }
     91 }
     92