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/*
* Copyright (C) 2015 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.settings;
import android.content.ContentResolver;
import android.graphics.ImageFormat;
import com.android.camera.debug.Log;
import com.android.camera.device.CameraId;
import com.android.camera.exif.Rational;
import com.android.camera.one.OneCamera;
import com.android.camera.one.OneCamera.Facing;
import com.android.camera.one.OneCameraAccessException;
import com.android.camera.one.OneCameraCharacteristics;
import com.android.camera.one.OneCameraManager;
import com.android.camera.util.GservicesHelper;
import com.android.camera.util.Size;
import com.google.common.base.Preconditions;
import java.util.List;
/**
* Handles the picture resolution setting stored in SharedPreferences keyed by
* Keys.KEY_PICTURE_SIZE_BACK and Keys.KEY_PICTURE_SIZE_FRONT.
*/
public class ResolutionSetting {
private static final Log.Tag TAG = new Log.Tag("ResolutionSettings");
private final SettingsManager mSettingsManager;
private final OneCameraManager mOneCameraManager;
private final String mResolutionBlackListBack;
private final String mResolutionBlackListFront;
public ResolutionSetting(SettingsManager settingsManager,
OneCameraManager oneCameraManager,
ContentResolver contentResolver) {
mSettingsManager = settingsManager;
mOneCameraManager = oneCameraManager;
mResolutionBlackListBack = GservicesHelper.getBlacklistedResolutionsBack(contentResolver);
mResolutionBlackListFront = GservicesHelper.getBlacklistedResolutionsFront(contentResolver);
}
/**
* Changes the picture size settings for the cameras with specified facing.
* Pick the largest picture size with the specified aspect ratio.
*
* @param cameraId The specific camera device.
* @param aspectRatio The chosen aspect ratio.
*/
public void setPictureAspectRatio(CameraId cameraId, Rational aspectRatio)
throws OneCameraAccessException {
OneCameraCharacteristics cameraCharacteristics =
mOneCameraManager.getOneCameraCharacteristics(cameraId);
Facing cameraFacing = cameraCharacteristics.getCameraDirection();
// Pick the largest picture size with the selected aspect ratio and save
// the choice for front camera.
final String pictureSizeSettingKey = cameraFacing == OneCamera.Facing.FRONT ?
Keys.KEY_PICTURE_SIZE_FRONT : Keys.KEY_PICTURE_SIZE_BACK;
final String blacklist = cameraFacing == OneCamera.Facing.FRONT ? mResolutionBlackListFront
: mResolutionBlackListBack;
// All resolutions supported by the camera.
List<Size> supportedPictureSizes = cameraCharacteristics
.getSupportedPictureSizes(ImageFormat.JPEG);
// Filter sizes which we are showing to the user in settings.
// This might also add some new resolution we support on some devices
// non-natively.
supportedPictureSizes = ResolutionUtil.getDisplayableSizesFromSupported(
supportedPictureSizes, cameraFacing == OneCamera.Facing.BACK);
// Filter the remaining sizes through our backlist.
supportedPictureSizes = ResolutionUtil.filterBlackListedSizes(supportedPictureSizes,
blacklist);
final Size chosenPictureSize =
ResolutionUtil.getLargestPictureSize(aspectRatio, supportedPictureSizes);
mSettingsManager.set(
SettingsManager.SCOPE_GLOBAL,
pictureSizeSettingKey,
SettingsUtil.sizeToSettingString(chosenPictureSize));
}
/**
* Reads the picture size setting for the cameras with specified facing.
* This specifically avoids reading camera characteristics unless the size
* is blacklisted or is not cached to prevent a crash.
*/
public Size getPictureSize(CameraId cameraId, Facing cameraFacing)
throws OneCameraAccessException {
final String pictureSizeSettingKey = cameraFacing == OneCamera.Facing.FRONT ?
Keys.KEY_PICTURE_SIZE_FRONT : Keys.KEY_PICTURE_SIZE_BACK;
Size pictureSize = null;
String blacklist = "";
if (cameraFacing == OneCamera.Facing.BACK) {
blacklist = mResolutionBlackListBack;
} else if (cameraFacing == OneCamera.Facing.FRONT) {
blacklist = mResolutionBlackListFront;
}
// If there is no saved picture size preference or the saved on is
// blacklisted., pick a largest size with 4:3 aspect
boolean isPictureSizeSettingSet =
mSettingsManager.isSet(SettingsManager.SCOPE_GLOBAL, pictureSizeSettingKey);
boolean isPictureSizeBlacklisted = false;
// If a picture size is set, check whether it's blacklisted.
if (isPictureSizeSettingSet) {
pictureSize = SettingsUtil.sizeFromSettingString(
mSettingsManager.getString(SettingsManager.SCOPE_GLOBAL,
pictureSizeSettingKey));
isPictureSizeBlacklisted = pictureSize == null ||
ResolutionUtil.isBlackListed(pictureSize, blacklist);
}
// Due to b/21758681, it is possible that an invalid picture size has
// been saved to the settings. Therefore, picture size is set AND is not
// blacklisted, but completely invalid. In these cases, need to take the
// fallback, instead of the saved value. This logic should now save a
// valid picture size to the settings and self-correct the state of the
// settings.
final boolean isPictureSizeFromSettingsValid =
pictureSize.width() > 0 && pictureSize.height() > 0;
if (!isPictureSizeSettingSet || isPictureSizeBlacklisted || !isPictureSizeFromSettingsValid) {
final Rational aspectRatio = ResolutionUtil.ASPECT_RATIO_4x3;
OneCameraCharacteristics cameraCharacteristics =
mOneCameraManager.getOneCameraCharacteristics(cameraId);
final List<Size> supportedPictureSizes =
ResolutionUtil.filterBlackListedSizes(
cameraCharacteristics.getSupportedPictureSizes(ImageFormat.JPEG),
blacklist);
final Size fallbackPictureSize =
ResolutionUtil.getLargestPictureSize(aspectRatio, supportedPictureSizes);
mSettingsManager.set(
SettingsManager.SCOPE_GLOBAL,
pictureSizeSettingKey,
SettingsUtil.sizeToSettingString(fallbackPictureSize));
pictureSize = fallbackPictureSize;
Log.e(TAG, "Picture size setting is not set. Choose " + fallbackPictureSize);
// Crash here if invariants are violated
Preconditions.checkNotNull(fallbackPictureSize);
Preconditions.checkState(fallbackPictureSize.width() > 0
&& fallbackPictureSize.height() > 0);
}
return pictureSize;
}
/**
* Obtains the preferred picture aspect ratio in terms of the picture size
* setting.
*
* @param cameraId The specific camera device.
* @return The preferred picture aspect ratio.
* @throws OneCameraAccessException
*/
public Rational getPictureAspectRatio(CameraId cameraId, Facing facing)
throws OneCameraAccessException {
Size pictureSize = getPictureSize(cameraId, facing);
return new Rational(pictureSize.getWidth(), pictureSize.getHeight());
}
}
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