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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.mediaframeworktest;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FilenameFilter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import junit.framework.Assert;
public class CameraTestHelper {
public Camera mCamera;
private String TAG = "CameraTestHelper";
private static final int CAMERA_ID = 0;
private static final long WAIT_GENERIC = 3 * 1000; // 3 seconds
private static final long WAIT_ZOOM_ANIMATION = 5 * 1000; // 5 seconds
protected static final String CAMERA_STRESS_IMAGES_DIRECTORY = "cameraStressImages";
private static final String CAMERA_STRESS_IMAGES_PREFIX = "camera-stress-test";
private final CameraErrorCallback mCameraErrorCallback = new CameraErrorCallback();
private final class CameraErrorCallback implements android.hardware.Camera.ErrorCallback {
public void onError(int error, android.hardware.Camera camera) {
Assert.fail(String.format("Camera error, code: %d", error));
}
}
private ShutterCallback shutterCallback = new ShutterCallback() {
@Override
public void onShutter() {
Log.v(TAG, "Shutter");
}
};
private PictureCallback rawCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.v(TAG, "Raw picture taken");
}
};
private PictureCallback jpegCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream fos = null;
try {
Log.v(TAG, "JPEG picture taken");
fos = new FileOutputStream(String.format("%s/%s/%s-%d.jpg",
Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY,
CAMERA_STRESS_IMAGES_PREFIX, System.currentTimeMillis()));
fos.write(data);
} catch (FileNotFoundException e) {
Log.e(TAG, "File not found: " + e.toString());
} catch (IOException e) {
Log.e(TAG, "Error accessing file: " + e.toString());
} finally {
try {
if (fos != null) {
fos.close();
}
} catch (IOException e) {
Log.e(TAG, "Error closing file: " + e.toString());
}
}
}
};
/**
* Helper method for prepping test
*/
public void setupCameraTest() {
// Create the test images directory if it doesn't exist
File stressImagesDirectory = new File(String.format("%s/%s",
Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY));
if (!stressImagesDirectory.exists()) {
stressImagesDirectory.mkdir();
}
mCamera = Camera.open(CAMERA_ID);
}
/**
* Helper method for getting the available parameters of the default camera
*/
public Parameters getCameraParameters() {
mCamera = Camera.open(CAMERA_ID);
Parameters params = mCamera.getParameters();
mCamera.release();
return params;
}
/**
* Helper method for taking a photo
*/
public void capturePhoto() throws Exception {
mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
Thread.sleep(WAIT_GENERIC);
mCamera.stopPreview();
mCamera.release();
}
/**
* Helper method for cleaning up pics taken during tests
*/
public void cleanupTestImages() {
try {
File stressImagesDirectory = new File(String.format("%s/%s",
Environment.getExternalStorageDirectory(), CAMERA_STRESS_IMAGES_DIRECTORY));
File[] stressImages = stressImagesDirectory.listFiles();
for (File f : stressImages) {
f.delete();
}
} catch (SecurityException e) {
Log.e(TAG, "Security manager access violation: " + e.toString());
}
}
/**
* Helper method for setting the camera parameters
*/
public void setParameters(Parameters params) {
try {
mCamera.setParameters(params);
} catch (Exception e) {
Log.e(TAG, "Error setting camera parameters");
}
}
/**
* Helper method for starting up the camera preview
*/
public void startCameraPreview(SurfaceHolder surfaceHolder) throws Exception {
mCamera.setErrorCallback(mCameraErrorCallback);
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
Thread.sleep(WAIT_GENERIC);
}
}
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