/*
* 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.lightbox.android.camera;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.Size;
import android.media.CamcorderProfile;
import android.os.Build;
import android.util.FloatMath;
import android.util.Log;
import com.lightbox.android.camera.device.CameraHolder;
/**
* Provides utilities and keys for Camera settings.
*/
public class CameraSettings {
private static final int NOT_FOUND = -1;
public static final String KEY_VERSION = "pref_version_key";
public static final String KEY_LOCAL_VERSION = "pref_local_version_key";
public static final String KEY_VIDEO_QUALITY = "pref_video_quality_key";
public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key";
public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key";
public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key";
public static final String KEY_FLASH_MODE = "pref_camera_flashmode_key";
public static final String KEY_VIDEOCAMERA_FLASH_MODE = "pref_camera_video_flashmode_key";
public static final String KEY_COLOR_EFFECT = "pref_camera_coloreffect_key";
public static final String KEY_WHITE_BALANCE = "pref_camera_whitebalance_key";
public static final String KEY_SCENE_MODE = "pref_camera_scenemode_key";
public static final String KEY_EXPOSURE = "pref_camera_exposure_key";
public static final String KEY_CAMERA_ID = "pref_camera_id_key";
private static final String VIDEO_QUALITY_HIGH = "high";
private static final String VIDEO_QUALITY_MMS = "mms";
private static final String VIDEO_QUALITY_YOUTUBE = "youtube";
public static final String EXPOSURE_DEFAULT_VALUE = "0";
public static final int CURRENT_VERSION = 4;
public static final int CURRENT_LOCAL_VERSION = 1;
// max video duration in seconds for mms and youtube.
private static final int MMS_VIDEO_DURATION = (Build.VERSION.SDK_INT >= 0x00000008) ? CamcorderProfile.get(CamcorderProfile.QUALITY_LOW).duration : 60;
private static final int YOUTUBE_VIDEO_DURATION = 10 * 60; // 10 mins
private static final int DEFAULT_VIDEO_DURATION = 30 * 60; // 10 mins
public static final String DEFAULT_VIDEO_QUALITY_VALUE = "high";
// MMS video length
public static final int DEFAULT_VIDEO_DURATION_VALUE = -1;
private static final String TAG = "CameraSettings";
private final Context mContext;
private final Parameters mParameters;
private final CameraHolder mCameraHolder;
public CameraSettings(Activity activity, Parameters parameters,
CameraHolder cameraHolder) {
mContext = activity;
mParameters = parameters;
mCameraHolder = cameraHolder;
}
public PreferenceGroup getPreferenceGroup(int preferenceRes) {
PreferenceInflater inflater = new PreferenceInflater(mContext);
PreferenceGroup group =
(PreferenceGroup) inflater.inflate(preferenceRes);
initPreference(group);
return group;
}
public static void initialCameraPictureSize(Context context, Parameters parameters) {
// When launching the camera app first time, we will set the picture
// size to the first one in the list defined in "arrays.xml" and is also
// supported by the driver.
List<Size> supported = parameters.getSupportedPictureSizes();
if (supported == null)
return;
Size candidate = null;
for (Size size : supported) {
// check for 4:3 ratio
if (Math.abs((((float) size.width / 4) * 3) - size.height) < (0.10f * size.width)) { // 10% tolerence to 4:3 ratio
if (candidate == null || size.height > candidate.height) {
candidate = size;
}
}
}
if (candidate != null) {
parameters.setPictureSize(candidate.width, candidate.height);
} else {
Log.e(TAG, "No supported picture size found");
}
}
public static void removePreferenceFromScreen(
PreferenceGroup group, String key) {
removePreference(group, key);
}
public static boolean setCameraPictureSize(
String candidate, List<Size> supported, Parameters parameters) {
int index = candidate.indexOf('x');
if (index == NOT_FOUND) return false;
int width = Integer.parseInt(candidate.substring(0, index));
int height = Integer.parseInt(candidate.substring(index + 1));
for (Size size: supported) {
if (size.width == width && size.height == height) {
parameters.setPictureSize(width, height);
return true;
}
}
return false;
}
private void initPreference(PreferenceGroup group) {
ListPreference videoQuality = group.findPreference(KEY_VIDEO_QUALITY);
ListPreference pictureSize = group.findPreference(KEY_PICTURE_SIZE);
ListPreference whiteBalance = group.findPreference(KEY_WHITE_BALANCE);
ListPreference colorEffect = group.findPreference(KEY_COLOR_EFFECT);
ListPreference sceneMode = group.findPreference(KEY_SCENE_MODE);
ListPreference flashMode = group.findPreference(KEY_FLASH_MODE);
ListPreference focusMode = group.findPreference(KEY_FOCUS_MODE);
ListPreference exposure = group.findPreference(KEY_EXPOSURE);
IconListPreference cameraId =
(IconListPreference)group.findPreference(KEY_CAMERA_ID);
ListPreference videoFlashMode =
group.findPreference(KEY_VIDEOCAMERA_FLASH_MODE);
// Since the screen could be loaded from different resources, we need
// to check if the preference is available here
if (videoQuality != null) {
// Modify video duration settings.
// The first entry is for MMS video duration, and we need to fill
// in the device-dependent value (in seconds).
CharSequence[] entries = videoQuality.getEntries();
CharSequence[] values = videoQuality.getEntryValues();
for (int i = 0; i < entries.length; ++i) {
if (VIDEO_QUALITY_MMS.equals(values[i])) {
entries[i] = entries[i].toString().replace(
"30", Integer.toString(MMS_VIDEO_DURATION));
break;
}
}
}
// Filter out unsupported settings / options
if (pictureSize != null) {
filterUnsupportedOptions(group, pictureSize, sizeListToStringList(
mParameters.getSupportedPictureSizes()));
}
if (whiteBalance != null) {
filterUnsupportedOptions(group,
whiteBalance, mParameters.getSupportedWhiteBalance());
}
if (colorEffect != null) {
filterUnsupportedOptions(group,
colorEffect, mParameters.getSupportedColorEffects());
}
if (sceneMode != null) {
filterUnsupportedOptions(group,
sceneMode, mParameters.getSupportedSceneModes());
}
if (flashMode != null) {
filterUnsupportedOptions(group,
flashMode, mParameters.getSupportedFlashModes());
}
if (focusMode != null) {
filterUnsupportedOptions(group,
focusMode, mParameters.getSupportedFocusModes());
}
if (videoFlashMode != null) {
filterUnsupportedOptions(group,
videoFlashMode, mParameters.getSupportedFlashModes());
}
if (exposure != null) buildExposureCompensation(group, exposure);
if (cameraId != null) buildCameraId(group, cameraId);
}
private void buildExposureCompensation(
PreferenceGroup group, ListPreference exposure) {
int max = ParameterUtils.getMaxExposureCompensation(mParameters);
int min = ParameterUtils.getMinExposureCompensation(mParameters);
if (max == 0 && min == 0) {
removePreference(group, exposure.getKey());
return;
}
float step = ParameterUtils.getExposureCompensationStep(mParameters);
// show only integer values for exposure compensation
int maxValue = (int) FloatMath.floor(max * step);
int minValue = (int) FloatMath.ceil(min * step);
CharSequence entries[] = new CharSequence[maxValue - minValue + 1];
CharSequence entryValues[] = new CharSequence[maxValue - minValue + 1];
for (int i = minValue; i <= maxValue; ++i) {
entryValues[maxValue - i] = Integer.toString(Math.round(i / step));
StringBuilder builder = new StringBuilder();
if (i > 0) builder.append('+');
entries[maxValue - i] = builder.append(i).toString();
}
exposure.setEntries(entries);
exposure.setEntryValues(entryValues);
}
private void buildCameraId(
PreferenceGroup group, IconListPreference cameraId) {
int numOfCameras = mCameraHolder.getNumberOfCameras();
if (numOfCameras < 2) {
removePreference(group, cameraId.getKey());
return;
}
CharSequence entries[] = new CharSequence[numOfCameras];
CharSequence entryValues[] = new CharSequence[numOfCameras];
int[] iconIds = new int[numOfCameras];
int[] largeIconIds = new int[numOfCameras];
for (int i = 0; i < numOfCameras; i++) {
entryValues[i] = Integer.toString(i);
if (mCameraHolder.isFrontFacing(i)) {
entries[i] = mContext.getString(
R.string.pref_camera_id_entry_front);
iconIds[i] = R.drawable.ic_menuselect_camera_facing_front;
largeIconIds[i] = R.drawable.ic_viewfinder_camera_facing_front;
} else {
entries[i] = mContext.getString(
R.string.pref_camera_id_entry_back);
iconIds[i] = R.drawable.ic_menuselect_camera_facing_back;
largeIconIds[i] = R.drawable.ic_viewfinder_camera_facing_back;
}
}
cameraId.setEntries(entries);
cameraId.setEntryValues(entryValues);
cameraId.setIconIds(iconIds);
cameraId.setLargeIconIds(largeIconIds);
}
private static boolean removePreference(PreferenceGroup group, String key) {
for (int i = 0, n = group.size(); i < n; i++) {
CameraPreference child = group.get(i);
if (child instanceof PreferenceGroup) {
if (removePreference((PreferenceGroup) child, key)) {
return true;
}
}
if (child instanceof ListPreference &&
((ListPreference) child).getKey().equals(key)) {
group.removePreference(i);
return true;
}
}
return false;
}
private void filterUnsupportedOptions(PreferenceGroup group,
ListPreference pref, List<String> supported) {
// Remove the preference if the parameter is not supported or there is
// only one options for the settings.
if (supported == null || supported.size() <= 1) {
removePreference(group, pref.getKey());
return;
}
pref.filterUnsupported(supported);
if (pref.getEntries().length <= 1) {
removePreference(group, pref.getKey());
return;
}
// Set the value to the first entry if it is invalid.
String value = pref.getValue();
if (pref.findIndexOfValue(value) == NOT_FOUND) {
pref.setValueIndex(0);
}
}
private static List<String> sizeListToStringList(List<Size> sizes) {
ArrayList<String> list = new ArrayList<String>();
for (Size size : sizes) {
list.add(String.format("%dx%d", size.width, size.height));
}
return list;
}
public static void upgradeLocalPreferences(SharedPreferences pref) {
int version;
try {
version = pref.getInt(KEY_LOCAL_VERSION, 0);
} catch (Exception ex) {
version = 0;
}
if (version == CURRENT_LOCAL_VERSION) return;
SharedPreferences.Editor editor = pref.edit();
editor.putInt(KEY_LOCAL_VERSION, CURRENT_LOCAL_VERSION);
editor.commit();
}
public static void upgradeGlobalPreferences(SharedPreferences pref) {
int version;
try {
version = pref.getInt(KEY_VERSION, 0);
} catch (Exception ex) {
version = 0;
}
if (version == CURRENT_VERSION) return;
SharedPreferences.Editor editor = pref.edit();
if (version == 0) {
// We won't use the preference which change in version 1.
// So, just upgrade to version 1 directly
version = 1;
}
if (version == 1) {
// Change jpeg quality {65,75,85} to {normal,fine,superfine}
String quality = pref.getString(KEY_JPEG_QUALITY, "85");
if (quality.equals("65")) {
quality = "normal";
} else if (quality.equals("75")) {
quality = "fine";
} else {
quality = "superfine";
}
editor.putString(KEY_JPEG_QUALITY, quality);
version = 2;
}
if (version == 2) {
version = 3;
}
if (version == 3) {
// Just use video quality to replace it and
// ignore the current settings.
editor.remove("pref_camera_videoquality_key");
editor.remove("pref_camera_video_duration_key");
}
editor.putInt(KEY_VERSION, CURRENT_VERSION);
editor.commit();
}
public static void upgradeAllPreferences(ComboPreferences pref) {
upgradeGlobalPreferences(pref.getGlobal());
upgradeLocalPreferences(pref.getLocal());
}
public static boolean getVideoQuality(String quality) {
return VIDEO_QUALITY_YOUTUBE.equals(
quality) || VIDEO_QUALITY_HIGH.equals(quality);
}
public static int getVidoeDurationInMillis(String quality) {
if (VIDEO_QUALITY_MMS.equals(quality)) {
return MMS_VIDEO_DURATION * 1000;
} else if (VIDEO_QUALITY_YOUTUBE.equals(quality)) {
return YOUTUBE_VIDEO_DURATION * 1000;
}
return DEFAULT_VIDEO_DURATION * 1000;
}
public static int readPreferredCameraId(SharedPreferences pref) {
return Integer.parseInt(pref.getString(KEY_CAMERA_ID, "0"));
}
public static void writePreferredCameraId(SharedPreferences pref,
int cameraId) {
Editor editor = pref.edit();
editor.putString(KEY_CAMERA_ID, Integer.toString(cameraId));
editor.commit();
}
}