/*
* 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.util.TypedValue;
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.FatalErrorHandler;
import com.android.camera.debug.Log;
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.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
/**
* Collection of utility functions used in this package.
*/
@Deprecated
public class CameraUtil {
private static final Log.Tag TAG = new Log.Tag("CameraUtil");
private static class Singleton {
private static final CameraUtil INSTANCE = new CameraUtil(
AndroidContext.instance().get());
}
/**
* Thread safe CameraUtil instance.
*/
public static CameraUtil instance() {
return Singleton.INSTANCE;
}
// 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 final ImageFileNamer mImageFileNamer;
private CameraUtil(Context context) {
mImageFileNamer = new ImageFileNamer(
context.getString(R.string.image_file_name_format));
}
/**
* 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.
*
* 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.
*
* 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();
}
}
/**
* Shows custom error dialog. Designed specifically
* for the scenario where the camera cannot be attached.
* @deprecated Use {@link FatalErrorHandler} instead.
*/
@Deprecated
public static void showError(final Activity activity, final int dialogMsgId, final int feedbackMsgId,
final boolean finishActivity, final Exception ex) {
final DialogInterface.OnClickListener buttonListener =
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (finishActivity) {
activity.finish();
}
}
};
DialogInterface.OnClickListener reportButtonListener =
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
new GoogleHelpHelper(activity).sendGoogleFeedback(feedbackMsgId, ex);
if (finishActivity) {
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(dialogMsgId)
.setNegativeButton(R.string.dialog_report, reportButtonListener)
.setPositiveButton(R.string.dialog_dismiss, buttonListener)
.setIcon(out.resourceId)
.show();
}
}
public static 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}.
*
* Returns null if sensorOrientation is not one of the above.
*
*/
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() {
WindowManager windowManager = AndroidServices.instance().provideWindowManager();
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;
}
private static Size getDefaultDisplaySize() {
WindowManager windowManager = AndroidServices.instance().provideWindowManager();
Point res = new Point();
windowManager.getDefaultDisplay().getSize(res);
return new Size(res);
}
public static Size getOptimalPreviewSize(List sizes, double targetRatio) {
int optimalPickIndex = getOptimalPreviewSizeIndex(sizes, targetRatio);
if (optimalPickIndex == -1) {
return null;
} else {
return sizes.get(optimalPickIndex);
}
}
/**
* Returns the index into 'sizes' that is most optimal given the current
* screen and target aspect ratio..
*
* This is using a default aspect ratio tolerance. If the tolerance is to be
* given you should call
* {@link #getOptimalPreviewSizeIndex(List, double, Double)}
*
* @param sizes the available preview sizes
* @param targetRatio the target aspect ratio, typically the aspect ratio of
* the picture size
* @return The index into 'previewSizes' for the optimal size, or -1, if no
* matching size was found.
*/
public static int getOptimalPreviewSizeIndex(List sizes, double targetRatio) {
// Use a very small tolerance because we want an exact match. HTC 4:3
// ratios is over .01 from true 4:3, so this value must be above .01,
// see b/18241645.
final double aspectRatioTolerance = 0.02;
return getOptimalPreviewSizeIndex(sizes, targetRatio, aspectRatioTolerance);
}
/**
* Returns the index into 'sizes' that is most optimal given the current
* screen, target aspect ratio and tolerance.
*
* @param previewSizes the available preview sizes
* @param targetRatio the target aspect ratio, typically the aspect ratio of
* the picture size
* @param aspectRatioTolerance the tolerance we allow between the selected
* preview size's aspect ratio and the target ratio. If this is
* set to 'null', the default value is used.
* @return The index into 'previewSizes' for the optimal size, or -1, if no
* matching size was found.
*/
public static int getOptimalPreviewSizeIndex(
List previewSizes, double targetRatio, Double aspectRatioTolerance) {
if (previewSizes == null) {
return -1;
}
// If no particular aspect ratio tolerance is set, use the default
// value.
if (aspectRatioTolerance == null) {
return getOptimalPreviewSizeIndex(previewSizes, targetRatio);
}
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();
int targetHeight = Math.min(defaultDisplaySize.getWidth(), defaultDisplaySize.getHeight());
// Try to find an size match aspect ratio and size
for (int i = 0; i < previewSizes.size(); i++) {
Size size = previewSizes.get(i);
double ratio = (double) size.getWidth() / size.getHeight();
if (Math.abs(ratio - targetRatio) > aspectRatioTolerance) {
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: " + previewSizes);
minDiff = Double.MAX_VALUE;
for (int i = 0; i < previewSizes.size(); i++) {
Size size = previewSizes.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 Size getOptimalVideoSnapshotPictureSize(
List 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;
}
Size optimalSize = null;
// WYSIWYG Override
// We assume that physical display constraints have already been
// imposed on the variables sizes
for (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 (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 (Size size : sizes) {
if (optimalSize == null || size.width() > optimalSize.width()) {
optimalSize = size;
}
}
}
return optimalSize;
}
// 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 inlineRectToRectF(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();
inlineRectToRectF(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 String createJpegName(long dateTaken) {
synchronized (mImageFileNamer) {
return mImageFileNamer.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);
}
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 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 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() throws CameraDisabledException {
// Check if device policy has disabled the camera.
DevicePolicyManager dpm = AndroidServices.instance().provideDevicePolicyManager();
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;
}
Point p = new Point();
p.x = boundWidth;
p.y = boundHeight;
// In some cases like automated testing, image height/width may not be
// loaded, to avoid divide by zero fall back to provided bounds.
if (imageWidth != 0 && imageHeight != 0) {
if (imageWidth * boundHeight > boundWidth * imageHeight) {
p.y = imageHeight * p.x / imageWidth;
} else {
p.x = imageWidth * p.y / imageHeight;
}
} else {
Log.w(TAG, "zero width/height, falling back to bounds (w|h|bw|bh):"
+ imageWidth + "|" + imageHeight + "|" + boundWidth + "|"
+ boundHeight);
}
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(CameraActivity activity, Uri uri, String title) {
try {
boolean isSecureCamera = activity.isSecureCamera();
if (!isSecureCamera) {
Intent intent = IntentHelper.getVideoPlayerIntent(uri)
.putExtra(Intent.EXTRA_TITLE, title)
.putExtra(KEY_TREAT_UP_AS_BACK, true);
activity.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"
*
* 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 clockwise angle of the device orientation from its
* natural orientation in degrees.
* @return The angle to rotate image clockwise in degrees. It should be 0, 90, 180, or 270.
*/
public static int getJpegRotation(int deviceOrientationDegrees,
CameraCharacteristics characteristics) {
if (deviceOrientationDegrees == OrientationEventListener.ORIENTATION_UNKNOWN) {
return 0;
}
boolean isFrontCamera = characteristics.get(CameraCharacteristics.LENS_FACING) ==
CameraMetadata.LENS_FACING_FRONT;
int sensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
return getImageRotation(sensorOrientation, deviceOrientationDegrees, isFrontCamera);
}
/**
* Given the camera sensor orientation and device orientation, this returns a clockwise angle
* which the final image needs to be rotated to be upright on the device screen.
*
* @param sensorOrientation Clockwise angle through which the output image needs to be rotated
* to be upright on the device screen in its native orientation.
* @param deviceOrientation Clockwise angle of the device orientation from its
* native orientation when front camera faces user.
* @param isFrontCamera True if the camera is front-facing.
* @return The angle to rotate image clockwise in degrees. It should be 0, 90, 180, or 270.
*/
public static int getImageRotation(int sensorOrientation,
int deviceOrientation,
boolean isFrontCamera) {
// The sensor of front camera faces in the opposite direction from back camera.
if (isFrontCamera) {
deviceOrientation = (360 - deviceOrientation) % 360;
}
return (sensorOrientation + deviceOrientation) % 360;
}
}