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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.hardware;
     18 
     19 import com.android.camera.app.CameraProvider;
     20 import com.android.camera.util.GcamHelper;
     21 import com.android.ex.camera2.portability.CameraCapabilities;
     22 
     23 /**
     24  * HardwareSpecImpl is the default implementation of
     25  * {@link com.android.camera.hardware.HardwareSpec} for
     26  * a camera device opened using the {@link android.hardware.Camera}
     27  * api.
     28  */
     29 public class HardwareSpecImpl implements HardwareSpec {
     30 
     31     private final boolean mIsFrontCameraSupported;
     32     private final boolean mIsHdrSupported;
     33     private final boolean mIsHdrPlusSupported;
     34     private final boolean mIsFlashSupported;
     35 
     36     /**
     37      * Compute the supported values for all
     38      * {@link com.android.camera.hardware.HardwareSpec} methods
     39      */
     40     public HardwareSpecImpl(CameraProvider provider, CameraCapabilities capabilities) {
     41         // Cache whether front camera is supported.
     42         mIsFrontCameraSupported = (provider.getFirstFrontCameraId() != -1);
     43 
     44         // Cache whether hdr is supported.
     45         mIsHdrSupported = capabilities.supports(CameraCapabilities.SceneMode.HDR);
     46 
     47         // Cache whether hdr plus is supported.
     48         mIsHdrPlusSupported = GcamHelper.hasGcamCapture();
     49 
     50         // Cache whether flash is supported.
     51         mIsFlashSupported = isFlashSupported(capabilities);
     52     }
     53 
     54     @Override
     55     public boolean isFrontCameraSupported() {
     56         return mIsFrontCameraSupported;
     57     }
     58 
     59     @Override
     60     public boolean isHdrSupported() {
     61         return mIsHdrSupported;
     62     }
     63 
     64     @Override
     65     public boolean isHdrPlusSupported() {
     66         return mIsHdrPlusSupported;
     67     }
     68 
     69     @Override
     70     public boolean isFlashSupported() {
     71         return mIsFlashSupported;
     72     }
     73 
     74     /**
     75      * Returns whether flash is supported and flash has more than
     76      * one possible value.
     77      */
     78     private boolean isFlashSupported(CameraCapabilities capabilities) {
     79         return (capabilities.supports(CameraCapabilities.FlashMode.AUTO) || capabilities.supports
     80                 (CameraCapabilities.FlashMode.ON));
     81     }
     82 }
     83