| /* |
| * Copyright (C) 2009 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.camera.util; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.admin.DevicePolicyManager; |
| import android.content.ActivityNotFoundException; |
| import android.content.ComponentName; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.Intent; |
| import android.content.res.TypedArray; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.graphics.Matrix; |
| import android.graphics.Point; |
| import android.graphics.PointF; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraMetadata; |
| import android.location.Location; |
| import android.net.Uri; |
| import android.os.ParcelFileDescriptor; |
| import android.telephony.TelephonyManager; |
| import android.util.DisplayMetrics; |
| import android.util.TypedValue; |
| import android.view.Display; |
| import android.view.OrientationEventListener; |
| import android.view.Surface; |
| import android.view.View; |
| import android.view.WindowManager; |
| import android.view.animation.AlphaAnimation; |
| import android.view.animation.Animation; |
| import android.widget.Toast; |
| |
| import com.android.camera.CameraActivity; |
| import com.android.camera.CameraDisabledException; |
| import com.android.camera.debug.Log; |
| import com.android.camera.filmstrip.ImageData; |
| import com.android.camera2.R; |
| import com.android.ex.camera2.portability.CameraCapabilities; |
| import com.android.ex.camera2.portability.CameraSettings; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.lang.reflect.Method; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Locale; |
| |
| /** |
| * Collection of utility functions used in this package. |
| */ |
| public class CameraUtil { |
| private static final Log.Tag TAG = new Log.Tag("Util"); |
| |
| // For calculate the best fps range for still image capture. |
| private final static int MAX_PREVIEW_FPS_TIMES_1000 = 400000; |
| private final static int PREFERRED_PREVIEW_FPS_TIMES_1000 = 30000; |
| |
| // For creating crop intents. |
| public static final String KEY_RETURN_DATA = "return-data"; |
| public static final String KEY_SHOW_WHEN_LOCKED = "showWhenLocked"; |
| |
| /** Orientation hysteresis amount used in rounding, in degrees. */ |
| public static final int ORIENTATION_HYSTERESIS = 5; |
| |
| public static final String REVIEW_ACTION = "com.android.camera.action.REVIEW"; |
| /** See android.hardware.Camera.ACTION_NEW_PICTURE. */ |
| public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; |
| /** See android.hardware.Camera.ACTION_NEW_VIDEO. */ |
| public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; |
| |
| /** |
| * Broadcast Action: The camera application has become active in |
| * picture-taking mode. |
| */ |
| public static final String ACTION_CAMERA_STARTED = "com.android.camera.action.CAMERA_STARTED"; |
| /** |
| * Broadcast Action: The camera application is no longer in active |
| * picture-taking mode. |
| */ |
| public static final String ACTION_CAMERA_STOPPED = "com.android.camera.action.CAMERA_STOPPED"; |
| /** |
| * When the camera application is active in picture-taking mode, it listens |
| * for this intent, which upon receipt will trigger the shutter to capture a |
| * new picture, as if the user had pressed the shutter button. |
| */ |
| public static final String ACTION_CAMERA_SHUTTER_CLICK = |
| "com.android.camera.action.SHUTTER_CLICK"; |
| |
| // Fields for the show-on-maps-functionality |
| private static final String MAPS_PACKAGE_NAME = "com.google.android.apps.maps"; |
| private static final String MAPS_CLASS_NAME = "com.google.android.maps.MapsActivity"; |
| |
| /** Has to be in sync with the receiving MovieActivity. */ |
| public static final String KEY_TREAT_UP_AS_BACK = "treat-up-as-back"; |
| |
| /** Private intent extras. Test only. */ |
| private static final String EXTRAS_CAMERA_FACING = |
| "android.intent.extras.CAMERA_FACING"; |
| |
| private static float sPixelDensity = 1; |
| private static ImageFileNamer sImageFileNamer; |
| |
| private CameraUtil() { |
| } |
| |
| public static void initialize(Context context) { |
| DisplayMetrics metrics = new DisplayMetrics(); |
| WindowManager wm = (WindowManager) |
| context.getSystemService(Context.WINDOW_SERVICE); |
| wm.getDefaultDisplay().getMetrics(metrics); |
| sPixelDensity = metrics.density; |
| sImageFileNamer = new ImageFileNamer( |
| context.getString(R.string.image_file_name_format)); |
| } |
| |
| public static int dpToPixel(int dp) { |
| return Math.round(sPixelDensity * dp); |
| } |
| |
| /** |
| * Rotates the bitmap by the specified degree. If a new bitmap is created, |
| * the original bitmap is recycled. |
| */ |
| public static Bitmap rotate(Bitmap b, int degrees) { |
| return rotateAndMirror(b, degrees, false); |
| } |
| |
| /** |
| * Rotates and/or mirrors the bitmap. If a new bitmap is created, the |
| * original bitmap is recycled. |
| */ |
| public static Bitmap rotateAndMirror(Bitmap b, int degrees, boolean mirror) { |
| if ((degrees != 0 || mirror) && b != null) { |
| Matrix m = new Matrix(); |
| // Mirror first. |
| // horizontal flip + rotation = -rotation + horizontal flip |
| if (mirror) { |
| m.postScale(-1, 1); |
| degrees = (degrees + 360) % 360; |
| if (degrees == 0 || degrees == 180) { |
| m.postTranslate(b.getWidth(), 0); |
| } else if (degrees == 90 || degrees == 270) { |
| m.postTranslate(b.getHeight(), 0); |
| } else { |
| throw new IllegalArgumentException("Invalid degrees=" + degrees); |
| } |
| } |
| if (degrees != 0) { |
| // clockwise |
| m.postRotate(degrees, |
| (float) b.getWidth() / 2, (float) b.getHeight() / 2); |
| } |
| |
| try { |
| Bitmap b2 = Bitmap.createBitmap( |
| b, 0, 0, b.getWidth(), b.getHeight(), m, true); |
| if (b != b2) { |
| b.recycle(); |
| b = b2; |
| } |
| } catch (OutOfMemoryError ex) { |
| // We have no memory to rotate. Return the original bitmap. |
| } |
| } |
| return b; |
| } |
| |
| /** |
| * Compute the sample size as a function of minSideLength and |
| * maxNumOfPixels. minSideLength is used to specify that minimal width or |
| * height of a bitmap. maxNumOfPixels is used to specify the maximal size in |
| * pixels that is tolerable in terms of memory usage. The function returns a |
| * sample size based on the constraints. |
| * <p> |
| * Both size and minSideLength can be passed in as -1 which indicates no |
| * care of the corresponding constraint. The functions prefers returning a |
| * sample size that generates a smaller bitmap, unless minSideLength = -1. |
| * <p> |
| * Also, the function rounds up the sample size to a power of 2 or multiple |
| * of 8 because BitmapFactory only honors sample size this way. For example, |
| * BitmapFactory downsamples an image by 2 even though the request is 3. So |
| * we round up the sample size to avoid OOM. |
| */ |
| public static int computeSampleSize(BitmapFactory.Options options, |
| int minSideLength, int maxNumOfPixels) { |
| int initialSize = computeInitialSampleSize(options, minSideLength, |
| maxNumOfPixels); |
| |
| int roundedSize; |
| if (initialSize <= 8) { |
| roundedSize = 1; |
| while (roundedSize < initialSize) { |
| roundedSize <<= 1; |
| } |
| } else { |
| roundedSize = (initialSize + 7) / 8 * 8; |
| } |
| |
| return roundedSize; |
| } |
| |
| private static int computeInitialSampleSize(BitmapFactory.Options options, |
| int minSideLength, int maxNumOfPixels) { |
| double w = options.outWidth; |
| double h = options.outHeight; |
| |
| int lowerBound = (maxNumOfPixels < 0) ? 1 : |
| (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); |
| int upperBound = (minSideLength < 0) ? 128 : |
| (int) Math.min(Math.floor(w / minSideLength), |
| Math.floor(h / minSideLength)); |
| |
| if (upperBound < lowerBound) { |
| // return the larger one when there is no overlapping zone. |
| return lowerBound; |
| } |
| |
| if (maxNumOfPixels < 0 && minSideLength < 0) { |
| return 1; |
| } else if (minSideLength < 0) { |
| return lowerBound; |
| } else { |
| return upperBound; |
| } |
| } |
| |
| public static Bitmap makeBitmap(byte[] jpegData, int maxNumOfPixels) { |
| try { |
| BitmapFactory.Options options = new BitmapFactory.Options(); |
| options.inJustDecodeBounds = true; |
| BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, |
| options); |
| if (options.mCancel || options.outWidth == -1 |
| || options.outHeight == -1) { |
| return null; |
| } |
| options.inSampleSize = computeSampleSize( |
| options, -1, maxNumOfPixels); |
| options.inJustDecodeBounds = false; |
| |
| options.inDither = false; |
| options.inPreferredConfig = Bitmap.Config.ARGB_8888; |
| return BitmapFactory.decodeByteArray(jpegData, 0, jpegData.length, |
| options); |
| } catch (OutOfMemoryError ex) { |
| Log.e(TAG, "Got oom exception ", ex); |
| return null; |
| } |
| } |
| |
| public static void closeSilently(Closeable c) { |
| if (c == null) { |
| return; |
| } |
| try { |
| c.close(); |
| } catch (Throwable t) { |
| // do nothing |
| } |
| } |
| |
| public static void Assert(boolean cond) { |
| if (!cond) { |
| throw new AssertionError(); |
| } |
| } |
| |
| public static void showErrorAndFinish(final Activity activity, int msgId) { |
| DialogInterface.OnClickListener buttonListener = |
| new DialogInterface.OnClickListener() { |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| activity.finish(); |
| } |
| }; |
| TypedValue out = new TypedValue(); |
| activity.getTheme().resolveAttribute(android.R.attr.alertDialogIcon, out, true); |
| // Some crash reports indicate users leave app prior to this dialog |
| // appearing, so check to ensure that the activity is not shutting down |
| // before attempting to attach a dialog to the window manager. |
| if (!activity.isFinishing()) { |
| Log.e(TAG, "Show fatal error dialog"); |
| new AlertDialog.Builder(activity) |
| .setCancelable(false) |
| .setTitle(R.string.camera_error_title) |
| .setMessage(msgId) |
| .setNeutralButton(R.string.dialog_ok, buttonListener) |
| .setIcon(out.resourceId) |
| .show(); |
| } |
| } |
| |
| public static <T> T checkNotNull(T object) { |
| if (object == null) { |
| throw new NullPointerException(); |
| } |
| return object; |
| } |
| |
| public static boolean equals(Object a, Object b) { |
| return (a == b) || (a == null ? false : a.equals(b)); |
| } |
| |
| public static int nextPowerOf2(int n) { |
| // TODO: what happens if n is negative or already a power of 2? |
| n -= 1; |
| n |= n >>> 16; |
| n |= n >>> 8; |
| n |= n >>> 4; |
| n |= n >>> 2; |
| n |= n >>> 1; |
| return n + 1; |
| } |
| |
| public static float distance(float x, float y, float sx, float sy) { |
| float dx = x - sx; |
| float dy = y - sy; |
| return (float) Math.sqrt(dx * dx + dy * dy); |
| } |
| |
| /** |
| * Clamps x to between min and max (inclusive on both ends, x = min --> min, |
| * x = max --> max). |
| */ |
| public static int clamp(int x, int min, int max) { |
| if (x > max) { |
| return max; |
| } |
| if (x < min) { |
| return min; |
| } |
| return x; |
| } |
| |
| /** |
| * Clamps x to between min and max (inclusive on both ends, x = min --> min, |
| * x = max --> max). |
| */ |
| public static float clamp(float x, float min, float max) { |
| if (x > max) { |
| return max; |
| } |
| if (x < min) { |
| return min; |
| } |
| return x; |
| } |
| |
| /** |
| * Linear interpolation between a and b by the fraction t. t = 0 --> a, t = |
| * 1 --> b. |
| */ |
| public static float lerp(float a, float b, float t) { |
| return a + t * (b - a); |
| } |
| |
| /** |
| * Given (nx, ny) \in [0, 1]^2, in the display's portrait coordinate system, |
| * returns normalized sensor coordinates \in [0, 1]^2 depending on how |
| * the sensor's orientation \in {0, 90, 180, 270}. |
| * |
| * <p> |
| * Returns null if sensorOrientation is not one of the above. |
| * </p> |
| */ |
| public static PointF normalizedSensorCoordsForNormalizedDisplayCoords( |
| float nx, float ny, int sensorOrientation) { |
| switch (sensorOrientation) { |
| case 0: |
| return new PointF(nx, ny); |
| case 90: |
| return new PointF(ny, 1.0f - nx); |
| case 180: |
| return new PointF(1.0f - nx, 1.0f - ny); |
| case 270: |
| return new PointF(1.0f - ny, nx); |
| default: |
| return null; |
| } |
| } |
| |
| /** |
| * Given a size, return the largest size with the given aspectRatio that |
| * maximally fits into the bounding rectangle of the original Size. |
| * |
| * @param size the original Size to crop |
| * @param aspectRatio the target aspect ratio |
| * @return the largest Size with the given aspect ratio that is smaller than |
| * or equal to the original Size. |
| */ |
| public static Size constrainToAspectRatio(Size size, float aspectRatio) { |
| float width = size.getWidth(); |
| float height = size.getHeight(); |
| |
| float currentAspectRatio = width * 1.0f / height; |
| |
| if (currentAspectRatio > aspectRatio) { |
| // chop longer side |
| if (width > height) { |
| width = height * aspectRatio; |
| } else { |
| height = width / aspectRatio; |
| } |
| } else if (currentAspectRatio < aspectRatio) { |
| // chop shorter side |
| if (width < height) { |
| width = height * aspectRatio; |
| } else { |
| height = width / aspectRatio; |
| } |
| } |
| |
| return new Size((int) width, (int) height); |
| } |
| |
| public static int getDisplayRotation(Context context) { |
| WindowManager windowManager = (WindowManager) context |
| .getSystemService(Context.WINDOW_SERVICE); |
| int rotation = windowManager.getDefaultDisplay() |
| .getRotation(); |
| switch (rotation) { |
| case Surface.ROTATION_0: |
| return 0; |
| case Surface.ROTATION_90: |
| return 90; |
| case Surface.ROTATION_180: |
| return 180; |
| case Surface.ROTATION_270: |
| return 270; |
| } |
| return 0; |
| } |
| |
| /** |
| * Calculate the default orientation of the device based on the width and |
| * height of the display when rotation = 0 (i.e. natural width and height) |
| * |
| * @param context current context |
| * @return whether the default orientation of the device is portrait |
| */ |
| public static boolean isDefaultToPortrait(Context context) { |
| Display currentDisplay = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)) |
| .getDefaultDisplay(); |
| Point displaySize = new Point(); |
| currentDisplay.getSize(displaySize); |
| int orientation = currentDisplay.getRotation(); |
| int naturalWidth, naturalHeight; |
| if (orientation == Surface.ROTATION_0 || orientation == Surface.ROTATION_180) { |
| naturalWidth = displaySize.x; |
| naturalHeight = displaySize.y; |
| } else { |
| naturalWidth = displaySize.y; |
| naturalHeight = displaySize.x; |
| } |
| return naturalWidth < naturalHeight; |
| } |
| |
| public static int roundOrientation(int orientation, int orientationHistory) { |
| boolean changeOrientation = false; |
| if (orientationHistory == OrientationEventListener.ORIENTATION_UNKNOWN) { |
| changeOrientation = true; |
| } else { |
| int dist = Math.abs(orientation - orientationHistory); |
| dist = Math.min(dist, 360 - dist); |
| changeOrientation = (dist >= 45 + ORIENTATION_HYSTERESIS); |
| } |
| if (changeOrientation) { |
| return ((orientation + 45) / 90 * 90) % 360; |
| } |
| return orientationHistory; |
| } |
| |
| private static Size getDefaultDisplaySize(Context context) { |
| WindowManager windowManager = (WindowManager) context |
| .getSystemService(Context.WINDOW_SERVICE); |
| Point res = new Point(); |
| windowManager.getDefaultDisplay().getSize(res); |
| return new Size(res); |
| } |
| |
| public static com.android.ex.camera2.portability.Size getOptimalPreviewSize(Context context, |
| List<com.android.ex.camera2.portability.Size> sizes, double targetRatio) { |
| int optimalPickIndex = getOptimalPreviewSizeIndex(context, Size.convert(sizes), |
| targetRatio); |
| if (optimalPickIndex == -1) { |
| return null; |
| } else { |
| return sizes.get(optimalPickIndex); |
| } |
| } |
| |
| public static int getOptimalPreviewSizeIndex(Context context, |
| List<Size> sizes, double targetRatio) { |
| // Use a very small tolerance because we want an exact match. |
| final double ASPECT_TOLERANCE; |
| // HTC 4:3 ratios is over .01 from true 4:3, targeted fix for those |
| // devices here, see b/18241645 |
| if (ApiHelper.IS_HTC && targetRatio > 1.3433 && targetRatio < 1.35) { |
| Log.w(TAG, "4:3 ratio out of normal tolerance, increasing tolerance to 0.02"); |
| ASPECT_TOLERANCE = 0.02; |
| } else { |
| ASPECT_TOLERANCE = 0.01; |
| } |
| if (sizes == null) { |
| return -1; |
| } |
| |
| int optimalSizeIndex = -1; |
| double minDiff = Double.MAX_VALUE; |
| |
| // Because of bugs of overlay and layout, we sometimes will try to |
| // layout the viewfinder in the portrait orientation and thus get the |
| // wrong size of preview surface. When we change the preview size, the |
| // new overlay will be created before the old one closed, which causes |
| // an exception. For now, just get the screen size. |
| Size defaultDisplaySize = getDefaultDisplaySize(context); |
| int targetHeight = Math.min(defaultDisplaySize.getWidth(), defaultDisplaySize.getHeight()); |
| // Try to find an size match aspect ratio and size |
| for (int i = 0; i < sizes.size(); i++) { |
| Size size = sizes.get(i); |
| double ratio = (double) size.getWidth() / size.getHeight(); |
| if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) { |
| continue; |
| } |
| |
| double heightDiff = Math.abs(size.getHeight() - targetHeight); |
| if (heightDiff < minDiff) { |
| optimalSizeIndex = i; |
| minDiff = heightDiff; |
| } else if (heightDiff == minDiff) { |
| // Prefer resolutions smaller-than-display when an equally close |
| // larger-than-display resolution is available |
| if (size.getHeight() < targetHeight) { |
| optimalSizeIndex = i; |
| minDiff = heightDiff; |
| } |
| } |
| } |
| // Cannot find the one match the aspect ratio. This should not happen. |
| // Ignore the requirement. |
| if (optimalSizeIndex == -1) { |
| Log.w(TAG, "No preview size match the aspect ratio. available sizes: " + sizes); |
| minDiff = Double.MAX_VALUE; |
| for (int i = 0; i < sizes.size(); i++) { |
| Size size = sizes.get(i); |
| if (Math.abs(size.getHeight() - targetHeight) < minDiff) { |
| optimalSizeIndex = i; |
| minDiff = Math.abs(size.getHeight() - targetHeight); |
| } |
| } |
| } |
| |
| return optimalSizeIndex; |
| } |
| |
| /** |
| * Returns the largest picture size which matches the given aspect ratio, |
| * except for the special WYSIWYG case where the picture size exactly matches |
| * the target size. |
| * |
| * @param sizes a list of candidate sizes, available for use |
| * @param targetWidth the ideal width of the video snapshot |
| * @param targetHeight the ideal height of the video snapshot |
| * @return the Optimal Video Snapshot Picture Size |
| */ |
| public static com.android.ex.camera2.portability.Size getOptimalVideoSnapshotPictureSize( |
| List<com.android.ex.camera2.portability.Size> sizes, int targetWidth, |
| int targetHeight) { |
| |
| // Use a very small tolerance because we want an exact match. |
| final double ASPECT_TOLERANCE = 0.001; |
| if (sizes == null) { |
| return null; |
| } |
| |
| com.android.ex.camera2.portability.Size optimalSize = null; |
| |
| // WYSIWYG Override |
| // We assume that physical display constraints have already been |
| // imposed on the variables sizes |
| for (com.android.ex.camera2.portability.Size size : sizes) { |
| if (size.height() == targetHeight && size.width() == targetWidth) { |
| return size; |
| } |
| } |
| |
| // Try to find a size matches aspect ratio and has the largest width |
| final double targetRatio = (double) targetWidth / targetHeight; |
| for (com.android.ex.camera2.portability.Size size : sizes) { |
| double ratio = (double) size.width() / size.height(); |
| if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) { |
| continue; |
| } |
| if (optimalSize == null || size.width() > optimalSize.width()) { |
| optimalSize = size; |
| } |
| } |
| |
| // Cannot find one that matches the aspect ratio. This should not |
| // happen. Ignore the requirement. |
| if (optimalSize == null) { |
| Log.w(TAG, "No picture size match the aspect ratio"); |
| for (com.android.ex.camera2.portability.Size size : sizes) { |
| if (optimalSize == null || size.width() > optimalSize.width()) { |
| optimalSize = size; |
| } |
| } |
| } |
| return optimalSize; |
| } |
| |
| /** |
| * Returns whether the device is voice-capable (meaning, it can do MMS). |
| */ |
| public static boolean isMmsCapable(Context context) { |
| TelephonyManager telephonyManager = (TelephonyManager) |
| context.getSystemService(Context.TELEPHONY_SERVICE); |
| if (telephonyManager == null) { |
| return false; |
| } |
| |
| try { |
| Class<?> partypes[] = new Class[0]; |
| Method sIsVoiceCapable = TelephonyManager.class.getMethod( |
| "isVoiceCapable", partypes); |
| |
| Object arglist[] = new Object[0]; |
| Object retobj = sIsVoiceCapable.invoke(telephonyManager, arglist); |
| return (Boolean) retobj; |
| } catch (java.lang.reflect.InvocationTargetException ite) { |
| // Failure, must be another device. |
| // Assume that it is voice capable. |
| } catch (IllegalAccessException iae) { |
| // Failure, must be an other device. |
| // Assume that it is voice capable. |
| } catch (NoSuchMethodException nsme) { |
| } |
| return true; |
| } |
| |
| // This is for test only. Allow the camera to launch the specific camera. |
| public static int getCameraFacingIntentExtras(Activity currentActivity) { |
| int cameraId = -1; |
| |
| int intentCameraId = |
| currentActivity.getIntent().getIntExtra(CameraUtil.EXTRAS_CAMERA_FACING, -1); |
| |
| if (isFrontCameraIntent(intentCameraId)) { |
| // Check if the front camera exist |
| int frontCameraId = ((CameraActivity) currentActivity).getCameraProvider() |
| .getFirstFrontCameraId(); |
| if (frontCameraId != -1) { |
| cameraId = frontCameraId; |
| } |
| } else if (isBackCameraIntent(intentCameraId)) { |
| // Check if the back camera exist |
| int backCameraId = ((CameraActivity) currentActivity).getCameraProvider() |
| .getFirstBackCameraId(); |
| if (backCameraId != -1) { |
| cameraId = backCameraId; |
| } |
| } |
| return cameraId; |
| } |
| |
| private static boolean isFrontCameraIntent(int intentCameraId) { |
| return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT); |
| } |
| |
| private static boolean isBackCameraIntent(int intentCameraId) { |
| return (intentCameraId == android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK); |
| } |
| |
| private static int sLocation[] = new int[2]; |
| |
| // This method is not thread-safe. |
| public static boolean pointInView(float x, float y, View v) { |
| v.getLocationInWindow(sLocation); |
| return x >= sLocation[0] && x < (sLocation[0] + v.getWidth()) |
| && y >= sLocation[1] && y < (sLocation[1] + v.getHeight()); |
| } |
| |
| public static int[] getRelativeLocation(View reference, View view) { |
| reference.getLocationInWindow(sLocation); |
| int referenceX = sLocation[0]; |
| int referenceY = sLocation[1]; |
| view.getLocationInWindow(sLocation); |
| sLocation[0] -= referenceX; |
| sLocation[1] -= referenceY; |
| return sLocation; |
| } |
| |
| public static boolean isUriValid(Uri uri, ContentResolver resolver) { |
| if (uri == null) { |
| return false; |
| } |
| |
| try { |
| ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r"); |
| if (pfd == null) { |
| Log.e(TAG, "Fail to open URI. URI=" + uri); |
| return false; |
| } |
| pfd.close(); |
| } catch (IOException ex) { |
| return false; |
| } |
| return true; |
| } |
| |
| public static void dumpRect(RectF rect, String msg) { |
| Log.v(TAG, msg + "=(" + rect.left + "," + rect.top |
| + "," + rect.right + "," + rect.bottom + ")"); |
| } |
| |
| public static void rectFToRect(RectF rectF, Rect rect) { |
| rect.left = Math.round(rectF.left); |
| rect.top = Math.round(rectF.top); |
| rect.right = Math.round(rectF.right); |
| rect.bottom = Math.round(rectF.bottom); |
| } |
| |
| public static Rect rectFToRect(RectF rectF) { |
| Rect rect = new Rect(); |
| rectFToRect(rectF, rect); |
| return rect; |
| } |
| |
| public static RectF rectToRectF(Rect r) { |
| return new RectF(r.left, r.top, r.right, r.bottom); |
| } |
| |
| public static void prepareMatrix(Matrix matrix, boolean mirror, int displayOrientation, |
| int viewWidth, int viewHeight) { |
| // Need mirror for front camera. |
| matrix.setScale(mirror ? -1 : 1, 1); |
| // This is the value for android.hardware.Camera.setDisplayOrientation. |
| matrix.postRotate(displayOrientation); |
| // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). |
| // UI coordinates range from (0, 0) to (width, height). |
| matrix.postScale(viewWidth / 2000f, viewHeight / 2000f); |
| matrix.postTranslate(viewWidth / 2f, viewHeight / 2f); |
| } |
| |
| public static void prepareMatrix(Matrix matrix, boolean mirror, int displayOrientation, |
| Rect previewRect) { |
| // Need mirror for front camera. |
| matrix.setScale(mirror ? -1 : 1, 1); |
| // This is the value for android.hardware.Camera.setDisplayOrientation. |
| matrix.postRotate(displayOrientation); |
| |
| // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). |
| // We need to map camera driver coordinates to preview rect coordinates |
| Matrix mapping = new Matrix(); |
| mapping.setRectToRect(new RectF(-1000, -1000, 1000, 1000), rectToRectF(previewRect), |
| Matrix.ScaleToFit.FILL); |
| matrix.setConcat(mapping, matrix); |
| } |
| |
| public static String createJpegName(long dateTaken) { |
| synchronized (sImageFileNamer) { |
| return sImageFileNamer.generateName(dateTaken); |
| } |
| } |
| |
| public static void broadcastNewPicture(Context context, Uri uri) { |
| context.sendBroadcast(new Intent(ACTION_NEW_PICTURE, uri)); |
| // Keep compatibility |
| context.sendBroadcast(new Intent("com.android.camera.NEW_PICTURE", uri)); |
| } |
| |
| public static void fadeIn(View view, float startAlpha, float endAlpha, long duration) { |
| if (view.getVisibility() == View.VISIBLE) { |
| return; |
| } |
| |
| view.setVisibility(View.VISIBLE); |
| Animation animation = new AlphaAnimation(startAlpha, endAlpha); |
| animation.setDuration(duration); |
| view.startAnimation(animation); |
| } |
| |
| /** |
| * Down-samples a jpeg byte array. |
| * |
| * @param data a byte array of jpeg data |
| * @param downSampleFactor down-sample factor |
| * @return decoded and down-sampled bitmap |
| */ |
| public static Bitmap downSample(final byte[] data, int downSampleFactor) { |
| final BitmapFactory.Options opts = new BitmapFactory.Options(); |
| // Downsample the image |
| opts.inSampleSize = downSampleFactor; |
| return BitmapFactory.decodeByteArray(data, 0, data.length, opts); |
| } |
| |
| public static void setGpsParameters(CameraSettings settings, Location loc) { |
| // Clear previous GPS location from the parameters. |
| settings.clearGpsData(); |
| |
| boolean hasLatLon = false; |
| double lat; |
| double lon; |
| // Set GPS location. |
| if (loc != null) { |
| lat = loc.getLatitude(); |
| lon = loc.getLongitude(); |
| hasLatLon = (lat != 0.0d) || (lon != 0.0d); |
| } |
| |
| if (!hasLatLon) { |
| // We always encode GpsTimeStamp even if the GPS location is not |
| // available. |
| settings.setGpsData( |
| new CameraSettings.GpsData(0f, 0f, 0f, System.currentTimeMillis() / 1000, null) |
| ); |
| } else { |
| Log.d(TAG, "Set gps location"); |
| // for NETWORK_PROVIDER location provider, we may have |
| // no altitude information, but the driver needs it, so |
| // we fake one. |
| // Location.getTime() is UTC in milliseconds. |
| // gps-timestamp is UTC in seconds. |
| long utcTimeSeconds = loc.getTime() / 1000; |
| settings.setGpsData(new CameraSettings.GpsData(loc.getLatitude(), loc.getLongitude(), |
| (loc.hasAltitude() ? loc.getAltitude() : 0), |
| (utcTimeSeconds != 0 ? utcTimeSeconds : System.currentTimeMillis()), |
| loc.getProvider().toUpperCase())); |
| } |
| } |
| |
| /** |
| * For still image capture, we need to get the right fps range such that the |
| * camera can slow down the framerate to allow for less-noisy/dark |
| * viewfinder output in dark conditions. |
| * |
| * @param capabilities Camera's capabilities. |
| * @return null if no appropiate fps range can't be found. Otherwise, return |
| * the right range. |
| */ |
| public static int[] getPhotoPreviewFpsRange(CameraCapabilities capabilities) { |
| return getPhotoPreviewFpsRange(capabilities.getSupportedPreviewFpsRange()); |
| } |
| |
| public static int[] getPhotoPreviewFpsRange(List<int[]> frameRates) { |
| if (frameRates.size() == 0) { |
| Log.e(TAG, "No suppoted frame rates returned!"); |
| return null; |
| } |
| |
| // Find the lowest min rate in supported ranges who can cover 30fps. |
| int lowestMinRate = MAX_PREVIEW_FPS_TIMES_1000; |
| for (int[] rate : frameRates) { |
| int minFps = rate[0]; |
| int maxFps = rate[1]; |
| if (maxFps >= PREFERRED_PREVIEW_FPS_TIMES_1000 && |
| minFps <= PREFERRED_PREVIEW_FPS_TIMES_1000 && |
| minFps < lowestMinRate) { |
| lowestMinRate = minFps; |
| } |
| } |
| |
| // Find all the modes with the lowest min rate found above, the pick the |
| // one with highest max rate. |
| int resultIndex = -1; |
| int highestMaxRate = 0; |
| for (int i = 0; i < frameRates.size(); i++) { |
| int[] rate = frameRates.get(i); |
| int minFps = rate[0]; |
| int maxFps = rate[1]; |
| if (minFps == lowestMinRate && highestMaxRate < maxFps) { |
| highestMaxRate = maxFps; |
| resultIndex = i; |
| } |
| } |
| |
| if (resultIndex >= 0) { |
| return frameRates.get(resultIndex); |
| } |
| Log.e(TAG, "Can't find an appropiate frame rate range!"); |
| return null; |
| } |
| |
| public static int[] getMaxPreviewFpsRange(List<int[]> frameRates) { |
| if (frameRates != null && frameRates.size() > 0) { |
| // The list is sorted. Return the last element. |
| return frameRates.get(frameRates.size() - 1); |
| } |
| return new int[0]; |
| } |
| |
| public static void throwIfCameraDisabled(Context context) throws CameraDisabledException { |
| // Check if device policy has disabled the camera. |
| DevicePolicyManager dpm = |
| (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE); |
| if (dpm.getCameraDisabled(null)) { |
| throw new CameraDisabledException(); |
| } |
| } |
| |
| /** |
| * Generates a 1d Gaussian mask of the input array size, and store the mask |
| * in the input array. |
| * |
| * @param mask empty array of size n, where n will be used as the size of |
| * the Gaussian mask, and the array will be populated with the |
| * values of the mask. |
| */ |
| private static void getGaussianMask(float[] mask) { |
| int len = mask.length; |
| int mid = len / 2; |
| float sigma = len; |
| float sum = 0; |
| for (int i = 0; i <= mid; i++) { |
| float ex = (float) Math.exp(-(i - mid) * (i - mid) / (mid * mid)) |
| / (2 * sigma * sigma); |
| int symmetricIndex = len - 1 - i; |
| mask[i] = ex; |
| mask[symmetricIndex] = ex; |
| sum += mask[i]; |
| if (i != symmetricIndex) { |
| sum += mask[symmetricIndex]; |
| } |
| } |
| |
| for (int i = 0; i < mask.length; i++) { |
| mask[i] /= sum; |
| } |
| |
| } |
| |
| /** |
| * Add two pixels together where the second pixel will be applied with a |
| * weight. |
| * |
| * @param pixel pixel color value of weight 1 |
| * @param newPixel second pixel color value where the weight will be applied |
| * @param weight a float weight that will be applied to the second pixel |
| * color |
| * @return the weighted addition of the two pixels |
| */ |
| public static int addPixel(int pixel, int newPixel, float weight) { |
| // TODO: scale weight to [0, 1024] to avoid casting to float and back to |
| // int. |
| int r = ((pixel & 0x00ff0000) + (int) ((newPixel & 0x00ff0000) * weight)) & 0x00ff0000; |
| int g = ((pixel & 0x0000ff00) + (int) ((newPixel & 0x0000ff00) * weight)) & 0x0000ff00; |
| int b = ((pixel & 0x000000ff) + (int) ((newPixel & 0x000000ff) * weight)) & 0x000000ff; |
| return 0xff000000 | r | g | b; |
| } |
| |
| /** |
| * Apply blur to the input image represented in an array of colors and put |
| * the output image, in the form of an array of colors, into the output |
| * array. |
| * |
| * @param src source array of colors |
| * @param out output array of colors after the blur |
| * @param w width of the image |
| * @param h height of the image |
| * @param size size of the Gaussian blur mask |
| */ |
| public static void blur(int[] src, int[] out, int w, int h, int size) { |
| float[] k = new float[size]; |
| int off = size / 2; |
| |
| getGaussianMask(k); |
| |
| int[] tmp = new int[src.length]; |
| |
| // Apply the 1d Gaussian mask horizontally to the image and put the |
| // intermediat results in a temporary array. |
| int rowPointer = 0; |
| for (int y = 0; y < h; y++) { |
| for (int x = 0; x < w; x++) { |
| int sum = 0; |
| for (int i = 0; i < k.length; i++) { |
| int dx = x + i - off; |
| dx = clamp(dx, 0, w - 1); |
| sum = addPixel(sum, src[rowPointer + dx], k[i]); |
| } |
| tmp[x + rowPointer] = sum; |
| } |
| rowPointer += w; |
| } |
| |
| // Apply the 1d Gaussian mask vertically to the intermediate array, and |
| // the final results will be stored in the output array. |
| for (int x = 0; x < w; x++) { |
| rowPointer = 0; |
| for (int y = 0; y < h; y++) { |
| int sum = 0; |
| for (int i = 0; i < k.length; i++) { |
| int dy = y + i - off; |
| dy = clamp(dy, 0, h - 1); |
| sum = addPixel(sum, tmp[dy * w + x], k[i]); |
| } |
| out[x + rowPointer] = sum; |
| rowPointer += w; |
| } |
| } |
| } |
| |
| /** |
| * Calculates a new dimension to fill the bound with the original aspect |
| * ratio preserved. |
| * |
| * @param imageWidth The original width. |
| * @param imageHeight The original height. |
| * @param imageRotation The clockwise rotation in degrees of the image which |
| * the original dimension comes from. |
| * @param boundWidth The width of the bound. |
| * @param boundHeight The height of the bound. |
| * @returns The final width/height stored in Point.x/Point.y to fill the |
| * bounds and preserve image aspect ratio. |
| */ |
| public static Point resizeToFill(int imageWidth, int imageHeight, int imageRotation, |
| int boundWidth, int boundHeight) { |
| if (imageRotation % 180 != 0) { |
| // Swap width and height. |
| int savedWidth = imageWidth; |
| imageWidth = imageHeight; |
| imageHeight = savedWidth; |
| } |
| if (imageWidth == ImageData.SIZE_FULL |
| || imageHeight == ImageData.SIZE_FULL) { |
| imageWidth = boundWidth; |
| imageHeight = boundHeight; |
| } |
| |
| Point p = new Point(); |
| p.x = boundWidth; |
| p.y = boundHeight; |
| |
| if (imageWidth * boundHeight > boundWidth * imageHeight) { |
| p.y = imageHeight * p.x / imageWidth; |
| } else { |
| p.x = imageWidth * p.y / imageHeight; |
| } |
| |
| return p; |
| } |
| |
| private static class ImageFileNamer { |
| private final SimpleDateFormat mFormat; |
| |
| // The date (in milliseconds) used to generate the last name. |
| private long mLastDate; |
| |
| // Number of names generated for the same second. |
| private int mSameSecondCount; |
| |
| public ImageFileNamer(String format) { |
| mFormat = new SimpleDateFormat(format); |
| } |
| |
| public String generateName(long dateTaken) { |
| Date date = new Date(dateTaken); |
| String result = mFormat.format(date); |
| |
| // If the last name was generated for the same second, |
| // we append _1, _2, etc to the name. |
| if (dateTaken / 1000 == mLastDate / 1000) { |
| mSameSecondCount++; |
| result += "_" + mSameSecondCount; |
| } else { |
| mLastDate = dateTaken; |
| mSameSecondCount = 0; |
| } |
| |
| return result; |
| } |
| } |
| |
| public static void playVideo(Activity activity, Uri uri, String title) { |
| try { |
| CameraActivity cameraActivity = (CameraActivity)activity; |
| boolean isSecureCamera = cameraActivity.isSecureCamera(); |
| if (!isSecureCamera) { |
| Intent intent = IntentHelper.getVideoPlayerIntent(uri) |
| .putExtra(Intent.EXTRA_TITLE, title) |
| .putExtra(KEY_TREAT_UP_AS_BACK, true); |
| cameraActivity.launchActivityByIntent(intent); |
| } else { |
| // In order not to send out any intent to be intercepted and |
| // show the lock screen immediately, we just let the secure |
| // camera activity finish. |
| activity.finish(); |
| } |
| } catch (ActivityNotFoundException e) { |
| Toast.makeText(activity, activity.getString(R.string.video_err), |
| Toast.LENGTH_SHORT).show(); |
| } |
| } |
| |
| /** |
| * Starts GMM with the given location shown. If this fails, and GMM could |
| * not be found, we use a geo intent as a fallback. |
| * |
| * @param activity the activity to use for launching the Maps intent. |
| * @param latLong a 2-element array containing {latitude/longitude}. |
| */ |
| public static void showOnMap(Activity activity, double[] latLong) { |
| try { |
| // We don't use "geo:latitude,longitude" because it only centers |
| // the MapView to the specified location, but we need a marker |
| // for further operations (routing to/from). |
| // The q=(lat, lng) syntax is suggested by geo-team. |
| String uri = String.format(Locale.ENGLISH, "http://maps.google.com/maps?f=q&q=(%f,%f)", |
| latLong[0], latLong[1]); |
| ComponentName compName = new ComponentName(MAPS_PACKAGE_NAME, |
| MAPS_CLASS_NAME); |
| Intent mapsIntent = new Intent(Intent.ACTION_VIEW, |
| Uri.parse(uri)).setComponent(compName); |
| mapsIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT); |
| activity.startActivity(mapsIntent); |
| } catch (ActivityNotFoundException e) { |
| // Use the "geo intent" if no GMM is installed |
| Log.e(TAG, "GMM activity not found!", e); |
| String url = String.format(Locale.ENGLISH, "geo:%f,%f", latLong[0], latLong[1]); |
| Intent mapsIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); |
| activity.startActivity(mapsIntent); |
| } |
| } |
| |
| /** |
| * Dumps the stack trace. |
| * |
| * @param level How many levels of the stack are dumped. 0 means all. |
| * @return A {@link java.lang.String} of all the output with newline between |
| * each. |
| */ |
| public static String dumpStackTrace(int level) { |
| StackTraceElement[] elems = Thread.currentThread().getStackTrace(); |
| // Ignore the first 3 elements. |
| level = (level == 0 ? elems.length : Math.min(level + 3, elems.length)); |
| String ret = new String(); |
| for (int i = 3; i < level; i++) { |
| ret = ret + "\t" + elems[i].toString() + '\n'; |
| } |
| return ret; |
| } |
| |
| /** |
| * Gets the theme color of a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return theme color of the mode if input index is valid, otherwise 0 |
| */ |
| public static int getCameraThemeColorId(int modeIndex, Context context) { |
| |
| // Find the theme color using id from the color array |
| TypedArray colorRes = context.getResources() |
| .obtainTypedArray(R.array.camera_mode_theme_color); |
| if (modeIndex >= colorRes.length() || modeIndex < 0) { |
| // Mode index not found |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return 0; |
| } |
| return colorRes.getResourceId(modeIndex, 0); |
| } |
| |
| /** |
| * Gets the mode icon resource id of a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return icon resource id if the index is valid, otherwise 0 |
| */ |
| public static int getCameraModeIconResId(int modeIndex, Context context) { |
| // Find the camera mode icon using id |
| TypedArray cameraModesIcons = context.getResources() |
| .obtainTypedArray(R.array.camera_mode_icon); |
| if (modeIndex >= cameraModesIcons.length() || modeIndex < 0) { |
| // Mode index not found |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return 0; |
| } |
| return cameraModesIcons.getResourceId(modeIndex, 0); |
| } |
| |
| /** |
| * Gets the mode text of a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return mode text if the index is valid, otherwise a new empty string |
| */ |
| public static String getCameraModeText(int modeIndex, Context context) { |
| // Find the camera mode icon using id |
| String[] cameraModesText = context.getResources() |
| .getStringArray(R.array.camera_mode_text); |
| if (modeIndex < 0 || modeIndex >= cameraModesText.length) { |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return new String(); |
| } |
| return cameraModesText[modeIndex]; |
| } |
| |
| /** |
| * Gets the mode content description of a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return mode content description if the index is valid, otherwise a new |
| * empty string |
| */ |
| public static String getCameraModeContentDescription(int modeIndex, Context context) { |
| String[] cameraModesDesc = context.getResources() |
| .getStringArray(R.array.camera_mode_content_description); |
| if (modeIndex < 0 || modeIndex >= cameraModesDesc.length) { |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return new String(); |
| } |
| return cameraModesDesc[modeIndex]; |
| } |
| |
| /** |
| * Gets the shutter icon res id for a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return mode shutter icon id if the index is valid, otherwise 0. |
| */ |
| public static int getCameraShutterIconId(int modeIndex, Context context) { |
| // Find the camera mode icon using id |
| TypedArray shutterIcons = context.getResources() |
| .obtainTypedArray(R.array.camera_mode_shutter_icon); |
| if (modeIndex < 0 || modeIndex >= shutterIcons.length()) { |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| throw new IllegalStateException("Invalid mode index: " + modeIndex); |
| } |
| return shutterIcons.getResourceId(modeIndex, 0); |
| } |
| |
| /** |
| * Gets the parent mode that hosts a specific mode in nav drawer. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return mode id if the index is valid, otherwise 0 |
| */ |
| public static int getCameraModeParentModeId(int modeIndex, Context context) { |
| // Find the camera mode icon using id |
| int[] cameraModeParent = context.getResources() |
| .getIntArray(R.array.camera_mode_nested_in_nav_drawer); |
| if (modeIndex < 0 || modeIndex >= cameraModeParent.length) { |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return 0; |
| } |
| return cameraModeParent[modeIndex]; |
| } |
| |
| /** |
| * Gets the mode cover icon resource id of a specific mode. |
| * |
| * @param modeIndex index of the mode |
| * @param context current context |
| * @return icon resource id if the index is valid, otherwise 0 |
| */ |
| public static int getCameraModeCoverIconResId(int modeIndex, Context context) { |
| // Find the camera mode icon using id |
| TypedArray cameraModesIcons = context.getResources() |
| .obtainTypedArray(R.array.camera_mode_cover_icon); |
| if (modeIndex >= cameraModesIcons.length() || modeIndex < 0) { |
| // Mode index not found |
| Log.e(TAG, "Invalid mode index: " + modeIndex); |
| return 0; |
| } |
| return cameraModesIcons.getResourceId(modeIndex, 0); |
| } |
| |
| /** |
| * Gets the number of cores available in this device, across all processors. |
| * Requires: Ability to peruse the filesystem at "/sys/devices/system/cpu" |
| * <p> |
| * Source: http://stackoverflow.com/questions/7962155/ |
| * |
| * @return The number of cores, or 1 if failed to get result |
| */ |
| public static int getNumCpuCores() { |
| // Private Class to display only CPU devices in the directory listing |
| class CpuFilter implements java.io.FileFilter { |
| @Override |
| public boolean accept(java.io.File pathname) { |
| // Check if filename is "cpu", followed by a single digit number |
| if (java.util.regex.Pattern.matches("cpu[0-9]+", pathname.getName())) { |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| try { |
| // Get directory containing CPU info |
| java.io.File dir = new java.io.File("/sys/devices/system/cpu/"); |
| // Filter to only list the devices we care about |
| java.io.File[] files = dir.listFiles(new CpuFilter()); |
| // Return the number of cores (virtual CPU devices) |
| return files.length; |
| } catch (Exception e) { |
| // Default to return 1 core |
| Log.e(TAG, "Failed to count number of cores, defaulting to 1", e); |
| return 1; |
| } |
| } |
| |
| /** |
| * Given the device orientation and Camera2 characteristics, this returns |
| * the required JPEG rotation for this camera. |
| * |
| * @param deviceOrientationDegrees the device orientation in degrees. |
| * @return The JPEG orientation in degrees. |
| */ |
| public static int getJpegRotation(int deviceOrientationDegrees, |
| CameraCharacteristics characteristics) { |
| if (deviceOrientationDegrees == OrientationEventListener.ORIENTATION_UNKNOWN) { |
| return 0; |
| } |
| int facing = characteristics.get(CameraCharacteristics.LENS_FACING); |
| int sensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION); |
| if (facing == CameraMetadata.LENS_FACING_FRONT) { |
| return (sensorOrientation + deviceOrientationDegrees) % 360; |
| } else { |
| return (sensorOrientation - deviceOrientationDegrees + 360) % 360; |
| } |
| } |
| } |
