private void initCamera() {
if (!isPreview) {
camera = Camera.open();
}
if (camera != null && !isPreview) {
streamIt = new StreamIt();
try {
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(screenWidth, screenHeight); // 设置预览照片的大小
parameters.setPreviewFpsRange(20, 30); // 每秒显示20~30帧
parameters.setPictureFormat(ImageFormat.NV21); // 设置图片格式
parameters.setPictureSize(screenWidth, screenHeight); // 设置照片的大小
camera.setPreviewDisplay(surfaceHolder); // 通过SurfaceView显示取景画面
camera.setPreviewCallback(streamIt); // 设置回调的类
camera.startPreview(); // 开始预览
camera.autoFocus(null); // 自动对焦
} catch (Exception e) {
e.printStackTrace();
}
isPreview = true;
Thread postThread2 = new Thread(new postThread());
postThread2.start();
System.out.println("线程启动了@@@@@@@@@@@@@@@@@@@@@@@@@@");
}
}
private void initPreview(int width, int height) {
if (camera != null && previewHolder.getSurface() != null) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
}
if (!cameraConfigured) {
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = getBestPreviewSize(width, height, parameters);
Camera.Size pictureSize = getLargestPictureSize(parameters);
if (size != null && pictureSize != null) {
if (parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
// set the focus mode
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
}
parameters.setPreviewSize(size.width, size.height);
parameters.setPictureSize(pictureSize.width, pictureSize.height);
parameters.setPictureFormat(ImageFormat.JPEG);
camera.setParameters(parameters);
cameraConfigured = true;
}
}
}
}
/** 给摄像头设置好一系列相关参数，并开始预览 */
private void initCamera() {
azLog.log("isPreView", "" + isPreview);
if (mCamera != null && !isPreview) {
try {
Camera.Parameters parameters = mCamera.getParameters();
// 设置预览照片的大小
parameters.setPreviewSize(mPreviewWidth, mPreviewHeight);
// 设置预览照片时每秒显示多少帧的最小值和最大值
parameters.setPreviewFpsRange(mFrameMin, mFrameMax);
// 设置图片格式
parameters.setPictureFormat(mImageFormat);
// 设置JPG照片的质量
parameters.set("jpeg-quality", mImageQuality);
// 设置照片的大小
parameters.setPictureSize(mPictureWidth, mPictureHeight);
// 通过SurfaceView显示取景画面
mCamera.setPreviewDisplay(mSurfaceHolder);
// 开始预览
mCamera.startPreview();
azLog.log("AzCamera", "摄像头打开");
} catch (IOException e) {
e.printStackTrace();
}
isPreview = true;
}
}
public void setCaptureQuality(int cameraType, String captureQuality) {
Camera camera = _cameras.get(cameraType);
if (camera == null) {
return;
}
Camera.Parameters parameters = camera.getParameters();
Camera.Size pictureSize = null;
switch (captureQuality) {
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_LOW:
pictureSize = getSmallestSize(parameters.getSupportedPictureSizes());
break;
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_MEDIUM:
List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
pictureSize = sizes.get(sizes.size() / 2);
break;
case RCTCameraModule.RCT_CAMERA_CAPTURE_QUALITY_HIGH:
pictureSize =
getBestSize(
parameters.getSupportedPictureSizes(), Integer.MAX_VALUE, Integer.MAX_VALUE);
}
if (pictureSize != null) {
parameters.setPictureSize(pictureSize.width, pictureSize.height);
camera.setParameters(parameters);
}
}
/** a wrapper to set a new picture size when taking a snapshot */
private void setNewSize(int formatIndex) {
try {
Camera.Parameters parameters = getCurrentParameters();
List<Camera.Size> supportedSizes = parameters.getSupportedPictureSizes();
Camera.Size optimalPictureSize = supportedSizes.get(formatIndex);
parameters.setPictureSize(optimalPictureSize.width, optimalPictureSize.height);
mCamera.setParameters(parameters);
} catch (Exception e) {
SYSLOG("FAILED TO SET the PARAMETERS");
}
}
private void initCameraParameters() {
Camera.Parameters parameters = mCamera.getParameters();
String mod = Build.MODEL;
if (Build.VERSION.SDK_INT >= 8) {
// MZ 180， other 90...
if ("M9".equalsIgnoreCase(mod) || "MX".equalsIgnoreCase(mod)) {
setDisplayOrientation(mCamera, 180);
} else {
setDisplayOrientation(mCamera, 90);
}
} else {
parameters.set("orientation", "portrait");
parameters.set("rotation", 90);
}
if (cameraCurrentlyLocked == CameraInfo.CAMERA_FACING_FRONT) {
ismCameraCanFlash = false;
} else {
ismCameraCanFlash = true;
}
if (!ismCameraCanFlash) {
mBtnFlash1.setVisibility(View.INVISIBLE);
mBtnFlash2.setVisibility(View.INVISIBLE);
mBtnFlash3.setVisibility(View.INVISIBLE);
} else {
mBtnFlash1.setVisibility(View.VISIBLE);
}
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
// Autofocus mode is supported
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
}
if (parameters.isZoomSupported()) {
parameters.setZoom(parameters.getZoom()); // 测试通过
}
Camera.Size previewSize = getFitParametersSize(parameters.getSupportedPreviewSizes());
parameters.setPreviewSize(previewSize.width, previewSize.height);
Camera.Size pictureSize = getFitParametersSize(parameters.getSupportedPictureSizes());
parameters.setPictureSize(pictureSize.width, pictureSize.height);
try {
mCamera.setParameters(parameters);
} catch (Exception e) {
e.printStackTrace();
}
}
// Used only in old camera interface (HALv3 don't use it)
public void setCameraPictureSize() {
Camera camera = CameraController.getCamera();
if (null == camera) return;
SharedPreferences prefs =
PreferenceManager.getDefaultSharedPreferences(MainScreen.getMainContext());
int jpegQuality = Integer.parseInt(prefs.getString(MainScreen.sJPEGQualityPref, "95"));
Camera.Parameters cp = CameraController.getInstance().getCameraParameters();
cp.setPictureSize(MainScreen.getImageWidth(), MainScreen.getImageHeight());
cp.setJpegQuality(jpegQuality);
try {
CameraController.getInstance().setCameraParameters(cp);
} catch (RuntimeException e) {
Log.e("CameraTest", "MainScreen.setupCamera unable setParameters " + e.getMessage());
}
}
public void takePicture(final PictureTransaction xact) {
if (inPreview) {
if (isAutoFocusing) {
throw new IllegalStateException("Camera cannot take a picture while auto-focusing");
} else {
previewParams = camera.getParameters();
Camera.Parameters pictureParams = camera.getParameters();
Camera.Size pictureSize = xact.host.getPictureSize(xact, pictureParams);
pictureParams.setPictureSize(pictureSize.width, pictureSize.height);
pictureParams.setPictureFormat(ImageFormat.JPEG);
if (xact.flashMode != null) {
pictureParams.setFlashMode(xact.flashMode);
}
if (!onOrientationChange.isEnabled()) {
setCameraPictureOrientation(pictureParams);
}
camera.setParameters(xact.host.adjustPictureParameters(xact, pictureParams));
xact.cameraView = this;
postDelayed(
new Runnable() {
@Override
public void run() {
try {
camera.takePicture(xact, null, new PictureTransactionCallback(xact));
} catch (Exception e) {
android.util.Log.e(getClass().getSimpleName(), "Exception taking a picture", e);
// TODO get this out to library clients
}
}
},
xact.host.getDeviceProfile().getPictureDelay());
inPreview = false;
}
} else {
throw new IllegalStateException(
"Preview mode must have started before you can take a picture");
}
}
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
parameters = camera.getParameters();
parameters.setPreviewSize(640, 480);
parameters.setPreviewFrameRate(30);
parameters.setJpegQuality(100);
parameters.setFocusMode("continuous-video");
parameters.setPictureSize(2048, 1536);
camera.setParameters(parameters); // /!!!!!
try {
camera.setPreviewDisplay(holder);
} catch (IOException exception) {
camera.release();
camera = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(holder);
Size size = choosePictureSize(camera.getParameters().getSupportedPictureSizes());
Camera.Parameters params = camera.getParameters();
params.setPictureSize(size.width, size.height);
params.setJpegQuality(100);
params.setJpegThumbnailQuality(100);
params.setRotation(mRotation); // set rotation to save the picture
// TODO: set the camera image size that is uniform and small.
camera.setParameters(params);
} catch (IOException e) {
Log.e(LOG, e.toString());
}
}
void initCameraParameters() {
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPictureFormat(ImageFormat.JPEG);
List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
// for(Size s:previewSizes){
// System.out.println("("+s.width+","+s.height+")");
// }
rate = CameraUtil.getScreenRate(RegistCameraActivity.this);
Size previewSize = CameraUtil.getPropPreviewSize(previewSizes, rate, 800);
parameters.setPreviewSize(previewSize.width, previewSize.height);
List<Camera.Size> pictureSizes = parameters.getSupportedPictureSizes();
Size pictureSize = CameraUtil.getPropPictureSize(pictureSizes, rate, 800);
parameters.setPictureSize(pictureSize.width, pictureSize.height);
if (CURRENT_CAMERA == CameraInfo.CAMERA_FACING_FRONT) {
mCameraOrientation = 270;
} else {
mCameraOrientation = 90;
}
parameters.setRotation(mCameraOrientation);
// parameters.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
mCamera.setParameters(parameters);
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// Attempt to open camera
_camera = Camera.open();
// Set desired camera parameters
Camera.Parameters p = _camera.getParameters();
p.setPictureFormat(ImageFormat.JPEG);
p.setPictureSize(_width, _height);
p.setJpegQuality(_quality);
_camera.setParameters(p);
} catch (RuntimeException e) {
Log.w(TAG, "Unable to connect to camera.", e);
// If opening the camera fails, return empty image and exit
final Intent intent = new Intent();
intent.setAction(PICTURE_INTENT);
intent.putExtra(IMAGE_EXTRA, new byte[0]);
sendBroadcast(intent);
setResult(RESULT_CANCELED, intent);
finish();
}
}
private void openCamera() {
try {
closeCamera();
mCamera = Camera.open();
mCamera.setDisplayOrientation(90); // 设置横行录制
Camera.Parameters params = mCamera.getParameters();
params.setPictureSize(1280, 720);
params.setPreviewSize(VideoWidth, VideoHeight);
// params.setPreviewFpsRange(12000, 20000);
mCamera.setParameters(params);
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
mCamera.setPreviewCallback(CameraThread.this);
mCamera.autoFocus(null); // very important
log("open camera");
} catch (IOException e) {
log("开启Camera exception");
log(e.getMessage());
} catch (Exception e) {
log("open 异常");
log(e.getMessage());
}
}
private void setPictureSize(Camera.Parameters parameters, Quality quality, Ratio ratio) {
Camera.Size size = pictureSizes.get(ratio).get(quality);
if (size != null) {
parameters.setPictureSize(size.width, size.height);
}
}
/**
* This is called immediately after any structural changes (format or size) have been made to the
* surface. You should at this point update the imagery in the surface. This method is always
* called at least once, after surfaceCreated(SurfaceHolder).
*
* @param holder The surface holder
* @param format Format for the surface
* @param w The width
* @param h The height
*/
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Check if the preview is running, if it is stop the preview
if (mPreviewRunning) {
mCamera.stopPreview();
}
String sizePref = "";
sizePref = prefs.getString("resolution", "Not Present");
String prevSizePref = "";
prevSizePref = prefs.getString("previewresolution", "Not Present");
Camera.Parameters p = mCamera.getParameters();
// If no camera size is found in the shared preferences get the largest
// supported size and set the picture size to that size
if (sizePref.equals("Not Present")) {
List<Size> sizes = p.getSupportedPictureSizes();
Size s = sizes.get(0);
for (Size size : sizes) {
if (size.width > s.width) {
s = size;
}
}
p.setPictureSize(s.width, s.height);
} else {
// Set to the users specified camera size
String[] userResolution = sizePref.split(":");
p.setPictureSize(Integer.valueOf(userResolution[0]), Integer.valueOf(userResolution[1]));
}
// If no preview size is found in the shared preferences get the first
// supported size and set the preview size to that size
if (prevSizePref.equals("Not Present")) {
// Use the first supported preview size
List<Size> previewSizes = p.getSupportedPreviewSizes();
p.setPreviewSize(previewSizes.get(0).width, previewSizes.get(0).height);
} else {
// Set to the users specified preview size
String[] userResolution = prevSizePref.split(":");
p.setPreviewSize(Integer.valueOf(userResolution[0]), Integer.valueOf(userResolution[1]));
}
// Set the focus mode to infinity
List<String> focusModes = p.getSupportedFocusModes();
for (String str : focusModes) {
if (str.equalsIgnoreCase("infinity")) {
p.setFocusMode(str);
}
}
try {
// Set the camera parameters
mCamera.setParameters(p);
} catch (Exception e) {
Toast.makeText(ctx, "Error occurred while setting parameters...", Toast.LENGTH_SHORT).show();
}
try {
// Set the preview to the holder
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
// Start the preview
mCamera.startPreview();
mPreviewRunning = true;
}
@Override
protected Boolean doInBackground(Void... args) {
if (opened) return true;
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
// Choose the first back-facing camera
boolean cameraAvailable = false;
final CameraInfo cameraInfo = new CameraInfo();
int cameraId = 0;
while (!cameraAvailable && cameraId < Camera.getNumberOfCameras()) {
Camera.getCameraInfo(cameraId, cameraInfo);
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) cameraAvailable = true;
else cameraId++;
}
if (!cameraAvailable) return false; // No back-facing camera available...
camera = Camera.open(cameraId);
cameraOrientation = cameraInfo.orientation;
} else {
camera = Camera.open();
cameraOrientation = 90; // TODO Is this correct?
}
if (camera == null) return false; // No camera available...
final Camera.Parameters params = camera.getParameters();
// Set the maximum resolution based on the maximum heap size
final int maxHeapSize =
((ActivityManager)
context.getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE))
.getMemoryClass();
final int maxResolution =
Math.min(
5 * 1024 * 1024,
maxHeapSize
* 1024
* 1024
/ 4
/ 3); // Each image might take up to 33% of the maximum heap size and 5
// megapixels at most
// System.err.println("max heap size: " + maxHeapSize);
// System.err.println("max resolution: " + maxResolution);
// Choose the biggest possible picture size within the limits and the corresponding preview
// sizes with the same ratio
pictureSize = null;
previewSizes = new ArrayList<Size>();
final List<Size> supportedPictureSizes = params.getSupportedPictureSizes();
final List<Size> supportedPreviewSizes = params.getSupportedPreviewSizes();
Collections.sort(supportedPictureSizes, Collections.reverseOrder(sizeComparator));
for (Size supportedPictureSize : supportedPictureSizes) {
for (Size supportedPreviewSize : supportedPreviewSizes) {
if (supportedPictureSize.width * supportedPreviewSize.height
== supportedPictureSize.height * supportedPreviewSize.width
&& supportedPictureSize.width * supportedPictureSize.height <= maxResolution) {
pictureSize = supportedPictureSize;
previewSizes.add(supportedPreviewSize);
}
}
if (pictureSize != null) break;
}
// System.err.println("Selected resolution: " + pictureSize.width + "x" +
// pictureSize.height);
Collections.sort(previewSizes, Collections.reverseOrder(sizeComparator));
if (pictureSize
== null) { // No picture size ratio and preview size ratio match (shouldn't happen...)
releaseCamera();
return false;
}
// Set parameters
final List<String> supportedWhiteBalance = params.getSupportedWhiteBalance();
final List<String> supportedFlashModes = params.getSupportedFlashModes();
final List<String> supportedSceneModes = params.getSupportedSceneModes();
final List<String> supportedFocusModes = params.getSupportedFocusModes();
params.setPictureSize(pictureSize.width, pictureSize.height);
params.setPreviewSize(previewSizes.get(0).width, previewSizes.get(0).height);
if (supportedWhiteBalance != null
&& supportedWhiteBalance.contains(Camera.Parameters.WHITE_BALANCE_AUTO)) {
params.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
}
if (supportedFlashModes != null
&& supportedFlashModes.contains(Camera.Parameters.FLASH_MODE_AUTO)) {
params.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
}
if (supportedSceneModes != null
&& supportedSceneModes.contains(Camera.Parameters.SCENE_MODE_AUTO)) {
params.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);
}
// TODO Decide the preferred focus mode order
if (supportedFocusModes != null
&& supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
autofocus = true;
} else if (supportedFocusModes != null
&& supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
autofocus = true;
} else if (supportedFocusModes != null
&& supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
autofocus = false;
} else {
autofocus = false;
}
camera.setParameters(params);
} catch (Exception e) {
releaseCamera();
return false; // Some error while opening the camera...
}
opened = true;
return true;
}
// (Re)start preview with the closest supported format to |width| x |height| @ |framerate|.
private void startPreviewOnCameraThread(int width, int height, int framerate) {
checkIsOnCameraThread();
Logging.d(
TAG, "startPreviewOnCameraThread requested: " + width + "x" + height + "@" + framerate);
if (camera == null) {
Logging.e(TAG, "Calling startPreviewOnCameraThread on stopped camera.");
return;
}
requestedWidth = width;
requestedHeight = height;
requestedFramerate = framerate;
// Find closest supported format for |width| x |height| @ |framerate|.
final Camera.Parameters parameters = camera.getParameters();
final int[] range = CameraEnumerationAndroid.getFramerateRange(parameters, framerate * 1000);
final Camera.Size previewSize =
CameraEnumerationAndroid.getClosestSupportedSize(
parameters.getSupportedPreviewSizes(), width, height);
final CaptureFormat captureFormat =
new CaptureFormat(
previewSize.width,
previewSize.height,
range[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
range[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
// Check if we are already using this capture format, then we don't need to do anything.
if (captureFormat.equals(this.captureFormat)) {
return;
}
// Update camera parameters.
Logging.d(TAG, "isVideoStabilizationSupported: " + parameters.isVideoStabilizationSupported());
if (parameters.isVideoStabilizationSupported()) {
parameters.setVideoStabilization(true);
}
// Note: setRecordingHint(true) actually decrease frame rate on N5.
// parameters.setRecordingHint(true);
if (captureFormat.maxFramerate > 0) {
parameters.setPreviewFpsRange(captureFormat.minFramerate, captureFormat.maxFramerate);
}
parameters.setPreviewSize(captureFormat.width, captureFormat.height);
parameters.setPreviewFormat(captureFormat.imageFormat);
// Picture size is for taking pictures and not for preview/video, but we need to set it anyway
// as a workaround for an aspect ratio problem on Nexus 7.
final Camera.Size pictureSize =
CameraEnumerationAndroid.getClosestSupportedSize(
parameters.getSupportedPictureSizes(), width, height);
parameters.setPictureSize(pictureSize.width, pictureSize.height);
// Temporarily stop preview if it's already running.
if (this.captureFormat != null) {
camera.stopPreview();
dropNextFrame = true;
// Calling |setPreviewCallbackWithBuffer| with null should clear the internal camera buffer
// queue, but sometimes we receive a frame with the old resolution after this call anyway.
camera.setPreviewCallbackWithBuffer(null);
}
// (Re)start preview.
Logging.d(TAG, "Start capturing: " + captureFormat);
this.captureFormat = captureFormat;
List<String> focusModes = parameters.getSupportedFocusModes();
if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
}
camera.setParameters(parameters);
if (!isCapturingToTexture) {
videoBuffers.queueCameraBuffers(captureFormat.frameSize(), camera);
camera.setPreviewCallbackWithBuffer(this);
}
camera.startPreview();
}
/**
* Opens the camera and applies the user settings.
*
* @throws RuntimeException if the method fails
*/
@SuppressLint("InlinedApi")
private Camera createCamera() {
int requestedCameraId = getIdForRequestedCamera(mFacing);
if (requestedCameraId == -1) {
throw new RuntimeException(mContext.getString(R.string.no_requested_camera));
}
Camera camera = Camera.open(requestedCameraId);
SizePair sizePair =
selectSizePair(camera, mRequestedPreviewWidth, mRequestedPreviewHeight, mContext);
if (sizePair == null) {
throw new RuntimeException(mContext.getString(R.string.no_suitable_preview_size));
}
Size pictureSize = sizePair.pictureSize();
mPreviewSize = sizePair.previewSize();
int[] previewFpsRange = selectPreviewFpsRange(camera, mRequestedFps);
if (previewFpsRange == null) {
throw new RuntimeException(mContext.getString(R.string.no_suitable_frames_per_second));
}
Camera.Parameters parameters = camera.getParameters();
parameters.setPictureSize(pictureSize.getWidth(), pictureSize.getHeight());
parameters.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
parameters.setPreviewFpsRange(
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MIN_INDEX],
previewFpsRange[Camera.Parameters.PREVIEW_FPS_MAX_INDEX]);
parameters.setPreviewFormat(ImageFormat.NV21);
setRotation(camera, parameters, requestedCameraId);
if (mFocusMode != null) {
if (parameters.getSupportedFocusModes().contains(mFocusMode)) {
parameters.setFocusMode(mFocusMode);
} else {
Log.i(
TAG,
mContext.getString(R.string.camera_focus_mode)
+ mFocusMode
+ mContext.getString(R.string.not_supported));
}
}
// setting mFocusMode to the one set in the params
mFocusMode = parameters.getFocusMode();
if (mFlashMode != null) {
if (parameters.getSupportedFlashModes().contains(mFlashMode)) {
parameters.setFlashMode(mFlashMode);
} else {
Log.i(
TAG,
mContext.getString(R.string.flash_mode)
+ mFlashMode
+ mContext.getString(R.string.not_supported));
}
}
// setting mFlashMode to the one set in the params
mFlashMode = parameters.getFlashMode();
camera.setParameters(parameters);
// Four frame buffers are needed for working with the camera:
//
// one for the frame that is currently being executed upon in doing detection
// one for the next pending frame to process immediately upon completing detection
// two for the frames that the camera uses to populate future preview images
camera.setPreviewCallbackWithBuffer(new CameraPreviewCallback());
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
camera.addCallbackBuffer(createPreviewBuffer(mPreviewSize));
return camera;
}