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
17package com.android.mediaframeworktest.helpers;
18
19import junit.framework.Assert;
20
21import android.hardware.Camera;
22import android.hardware.Camera.Parameters;
23import android.hardware.Camera.PictureCallback;
24import android.hardware.Camera.ShutterCallback;
25import android.os.Environment;
26import android.util.Log;
27import android.view.SurfaceHolder;
28
29import java.io.File;
30import java.io.FileNotFoundException;
31import java.io.FileOutputStream;
32import java.io.IOException;
33
34public class CameraTestHelper {
35
36    public Camera mCamera;
37    private String TAG = "CameraTestHelper";
38    private static final int CAMERA_ID = 0;
39    private static final long WAIT_GENERIC = 3 * 1000; // 3 seconds
40    private static final long WAIT_ZOOM_ANIMATION = 5 * 1000; // 5 seconds
41    protected static final String CAMERA_STRESS_IMAGES_DIRECTORY = "cameraStressImages";
42    private static final String CAMERA_STRESS_IMAGES_PREFIX = "camera-stress-test";
43    private final CameraErrorCallback mCameraErrorCallback = new CameraErrorCallback();
44
45    private final class CameraErrorCallback implements android.hardware.Camera.ErrorCallback {
46        public void onError(int error, android.hardware.Camera camera) {
47            Assert.fail(String.format("Camera error, code: %d", error));
48        }
49    }
50
51    private ShutterCallback shutterCallback = new ShutterCallback() {
52        @Override
53        public void onShutter() {
54            Log.v(TAG, "Shutter");
55        }
56    };
57
58    private PictureCallback rawCallback = new PictureCallback() {
59        @Override
60        public void onPictureTaken(byte[] data, Camera camera) {
61            Log.v(TAG, "Raw picture taken");
62        }
63    };
64
65    private PictureCallback jpegCallback = new PictureCallback() {
66        @Override
67        public void onPictureTaken(byte[] data, Camera camera) {
68            FileOutputStream fos = null;
69
70            try {
71                Log.v(TAG, "JPEG picture taken");
72                fos = new FileOutputStream(String.format("%s/%s/%s-%d.jpg",
73                        Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY,
74                        CAMERA_STRESS_IMAGES_PREFIX, System.currentTimeMillis()));
75                fos.write(data);
76            } catch (FileNotFoundException e) {
77                Log.e(TAG, "File not found: " + e.toString());
78            } catch (IOException e) {
79                Log.e(TAG, "Error accessing file: " + e.toString());
80            } finally {
81                try {
82                    if (fos != null) {
83                        fos.close();
84                    }
85                } catch (IOException e) {
86                    Log.e(TAG, "Error closing file: " + e.toString());
87                }
88            }
89        }
90    };
91
92    /**
93     * Helper method for prepping test
94     */
95    public void setupCameraTest() {
96        // Create the test images directory if it doesn't exist
97        File stressImagesDirectory = new File(String.format("%s/%s",
98                Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY));
99        if (!stressImagesDirectory.exists()) {
100            stressImagesDirectory.mkdir();
101        }
102
103        mCamera = Camera.open(CAMERA_ID);
104    }
105
106    /**
107     * Helper method for getting the available parameters of the default camera
108     */
109    public Parameters getCameraParameters() {
110        mCamera = Camera.open(CAMERA_ID);
111        Parameters params = mCamera.getParameters();
112        mCamera.release();
113        return params;
114    }
115
116    /**
117     * Helper method for taking a photo
118     */
119    public void capturePhoto() throws Exception {
120        mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
121        Thread.sleep(WAIT_GENERIC);
122        mCamera.stopPreview();
123        mCamera.release();
124    }
125
126    /**
127     * Helper method for cleaning up pics taken during tests
128     */
129    public void cleanupTestImages() {
130        try {
131            File stressImagesDirectory = new File(String.format("%s/%s",
132                    Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY));
133            File[] stressImages = stressImagesDirectory.listFiles();
134            for (File f : stressImages) {
135                f.delete();
136            }
137        } catch (SecurityException e) {
138            Log.e(TAG, "Security manager access violation: " + e.toString());
139        }
140    }
141
142    /**
143     * Helper method for setting the camera parameters
144     */
145    public void setParameters(Parameters params) {
146        try {
147            mCamera.setParameters(params);
148        } catch (Exception e) {
149            Log.e(TAG, "Error setting camera parameters");
150        }
151    }
152
153    /**
154     * Helper method for starting up the camera preview
155     */
156    public void startCameraPreview(SurfaceHolder surfaceHolder) throws Exception {
157        mCamera.setErrorCallback(mCameraErrorCallback);
158        mCamera.setPreviewDisplay(surfaceHolder);
159        mCamera.startPreview();
160        Thread.sleep(WAIT_GENERIC);
161    }
162}
163
164