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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.incallui;
     18 
     19 import android.content.Context;
     20 import android.graphics.SurfaceTexture;
     21 import android.hardware.camera2.CameraAccessException;
     22 import android.hardware.camera2.CameraCharacteristics;
     23 import android.hardware.camera2.CameraManager;
     24 import android.hardware.camera2.params.StreamConfigurationMap;
     25 import android.util.Size;
     26 
     27 import java.lang.String;
     28 
     29 /**
     30  * Used to track which camera is used for outgoing video.
     31  */
     32 public class InCallCameraManager {
     33 
     34     /**
     35      * The camera ID for the front facing camera.
     36      */
     37     private String mFrontFacingCameraId;
     38 
     39     /**
     40      * The camera ID for the rear facing camera.
     41      */
     42     private String mRearFacingCameraId;
     43 
     44     /**
     45      * The currently active camera.
     46      */
     47     private boolean mUseFrontFacingCamera;
     48 
     49     /**
     50      * Aspect ratio of the front facing camera.
     51      */
     52     private float mFrontFacingCameraAspectRatio;
     53 
     54     /**
     55      * Aspect ratio of the rear facing camera.
     56      */
     57     private float mRearFacingCameraAspectRatio;
     58 
     59     /**
     60      * Initializes the InCall CameraManager.
     61      *
     62      * @param context The current context.
     63      */
     64     public InCallCameraManager(Context context) {
     65         mUseFrontFacingCamera = true;
     66         initializeCameraList(context);
     67     }
     68 
     69     /**
     70      * Sets whether the front facing camera should be used or not.
     71      *
     72      * @param useFrontFacingCamera {@code True} if the front facing camera is to be used.
     73      */
     74     public void setUseFrontFacingCamera(boolean useFrontFacingCamera) {
     75         mUseFrontFacingCamera = useFrontFacingCamera;
     76     }
     77 
     78     /**
     79      * Determines whether the front facing camera is currently in use.
     80      *
     81      * @return {@code True} if the front facing camera is in use.
     82      */
     83     public boolean isUsingFrontFacingCamera() {
     84         return mUseFrontFacingCamera;
     85     }
     86 
     87     /**
     88      * Determines the active camera ID.
     89      *
     90      * @return The active camera ID.
     91      */
     92     public String getActiveCameraId() {
     93         if (mUseFrontFacingCamera) {
     94             return mFrontFacingCameraId;
     95         } else {
     96             return mRearFacingCameraId;
     97         }
     98     }
     99 
    100     /**
    101      * Get the camera ID and aspect ratio for the front and rear cameras.
    102      *
    103      * @param context The context.
    104      */
    105     private void initializeCameraList(Context context) {
    106         if (context == null) {
    107             return;
    108         }
    109 
    110         CameraManager cameraManager = null;
    111         try {
    112             cameraManager = (CameraManager) context.getSystemService(
    113                     Context.CAMERA_SERVICE);
    114         } catch (Exception e) {
    115             Log.e(this, "Could not get camera service.");
    116             return;
    117         }
    118 
    119         if (cameraManager == null) {
    120             return;
    121         }
    122 
    123         String[] cameraIds = {};
    124         try {
    125             cameraIds = cameraManager.getCameraIdList();
    126         } catch (CameraAccessException e) {
    127             Log.d(this, "Could not access camera: "+e);
    128             // Camera disabled by device policy.
    129             return;
    130         }
    131 
    132         for (int i = 0; i < cameraIds.length; i++) {
    133             CameraCharacteristics c = null;
    134             try {
    135                 c = cameraManager.getCameraCharacteristics(cameraIds[i]);
    136             } catch (IllegalArgumentException e) {
    137                 // Device Id is unknown.
    138             } catch (CameraAccessException e) {
    139                 // Camera disabled by device policy.
    140             }
    141             if (c != null) {
    142                 int facingCharacteristic = c.get(CameraCharacteristics.LENS_FACING);
    143                 if (facingCharacteristic == CameraCharacteristics.LENS_FACING_FRONT) {
    144                     mFrontFacingCameraId = cameraIds[i];
    145                 } else if (facingCharacteristic == CameraCharacteristics.LENS_FACING_BACK) {
    146                     mRearFacingCameraId = cameraIds[i];
    147                 }
    148             }
    149         }
    150     }
    151 }
    152