1 /*
2  * Copyright (C) 2013 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.mediaframeworktest.helpers;
18 
19 import junit.framework.Assert;
20 
21 import android.hardware.Camera;
22 import android.hardware.Camera.Parameters;
23 import android.hardware.Camera.PictureCallback;
24 import android.hardware.Camera.ShutterCallback;
25 import android.util.Log;
26 import android.view.SurfaceHolder;
27 
28 import androidx.test.InstrumentationRegistry;
29 
30 import java.io.File;
31 import java.io.FileNotFoundException;
32 import java.io.FileOutputStream;
33 import java.io.IOException;
34 
35 public class CameraTestHelper {
36 
37     public Camera mCamera;
38     private String TAG = "CameraTestHelper";
39     private static final int CAMERA_ID = 0;
40     private static final long WAIT_GENERIC = 3 * 1000; // 3 seconds
41     private static final long WAIT_ZOOM_ANIMATION = 5 * 1000; // 5 seconds
42     protected static final String CAMERA_STRESS_IMAGES_DIRECTORY = "cameraStressImages";
43     private static final String CAMERA_STRESS_IMAGES_PREFIX = "camera-stress-test";
44     private final CameraErrorCallback mCameraErrorCallback = new CameraErrorCallback();
45 
46     private final class CameraErrorCallback implements android.hardware.Camera.ErrorCallback {
onError(int error, android.hardware.Camera camera)47         public void onError(int error, android.hardware.Camera camera) {
48             Assert.fail(String.format("Camera error, code: %d", error));
49         }
50     }
51 
52     private ShutterCallback shutterCallback = new ShutterCallback() {
53         @Override
54         public void onShutter() {
55             Log.v(TAG, "Shutter");
56         }
57     };
58 
59     private PictureCallback rawCallback = new PictureCallback() {
60         @Override
61         public void onPictureTaken(byte[] data, Camera camera) {
62             Log.v(TAG, "Raw picture taken");
63         }
64     };
65 
66     private PictureCallback jpegCallback = new PictureCallback() {
67         @Override
68         public void onPictureTaken(byte[] data, Camera camera) {
69             FileOutputStream fos = null;
70 
71             try {
72                 Log.v(TAG, "JPEG picture taken");
73                 fos = new FileOutputStream(String.format("%s/%s/%s-%d.jpg",
74                         InstrumentationRegistry.getInstrumentation().getTargetContext()
75                         .getExternalFilesDir(null).getPath(), CAMERA_STRESS_IMAGES_DIRECTORY,
76                         CAMERA_STRESS_IMAGES_PREFIX, System.currentTimeMillis()));
77                 fos.write(data);
78             } catch (FileNotFoundException e) {
79                 Log.e(TAG, "File not found: " + e.toString());
80             } catch (IOException e) {
81                 Log.e(TAG, "Error accessing file: " + e.toString());
82             } finally {
83                 try {
84                     if (fos != null) {
85                         fos.close();
86                     }
87                 } catch (IOException e) {
88                     Log.e(TAG, "Error closing file: " + e.toString());
89                 }
90             }
91         }
92     };
93 
94     /**
95      * Helper method for prepping test
96      */
setupCameraTest()97     public void setupCameraTest() {
98         // Create the test images directory if it doesn't exist
99         File stressImagesDirectory = new File(String.format("%s/%s",
100                 InstrumentationRegistry.getInstrumentation().getTargetContext()
101                 .getExternalFilesDir(null).getPath(), CAMERA_STRESS_IMAGES_DIRECTORY));
102         if (!stressImagesDirectory.exists()) {
103             stressImagesDirectory.mkdir();
104         }
105 
106         mCamera = Camera.open(CAMERA_ID);
107     }
108 
109     /**
110      * Helper method for getting the available parameters of the default camera
111      */
getCameraParameters()112     public Parameters getCameraParameters() {
113         mCamera = Camera.open(CAMERA_ID);
114         Parameters params = mCamera.getParameters();
115         mCamera.release();
116         return params;
117     }
118 
119     /**
120      * Helper method for taking a photo
121      */
capturePhoto()122     public void capturePhoto() throws Exception {
123         mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
124         Thread.sleep(WAIT_GENERIC);
125         mCamera.stopPreview();
126         mCamera.release();
127     }
128 
129     /**
130      * Helper method for cleaning up pics taken during tests
131      */
cleanupTestImages()132     public void cleanupTestImages() {
133         try {
134             File stressImagesDirectory = new File(String.format("%s/%s",
135                     InstrumentationRegistry.getInstrumentation().getTargetContext()
136                     .getExternalFilesDir(null).getPath(), CAMERA_STRESS_IMAGES_DIRECTORY));
137             File[] stressImages = stressImagesDirectory.listFiles();
138             for (File f : stressImages) {
139                 f.delete();
140             }
141         } catch (SecurityException e) {
142             Log.e(TAG, "Security manager access violation: " + e.toString());
143         }
144     }
145 
146     /**
147      * Helper method for setting the camera parameters
148      */
setParameters(Parameters params)149     public void setParameters(Parameters params) {
150         try {
151             mCamera.setParameters(params);
152         } catch (Exception e) {
153             Log.e(TAG, "Error setting camera parameters");
154         }
155     }
156 
157     /**
158      * Helper method for starting up the camera preview
159      */
startCameraPreview(SurfaceHolder surfaceHolder)160     public void startCameraPreview(SurfaceHolder surfaceHolder) throws Exception {
161         mCamera.setErrorCallback(mCameraErrorCallback);
162         mCamera.setPreviewDisplay(surfaceHolder);
163         mCamera.startPreview();
164         Thread.sleep(WAIT_GENERIC);
165     }
166 }
167 
168