CameraSettings.java revision d159d11f5a47928a59c9bf27fbae1a95dd6cbb02
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.camera; 18 19import android.app.Activity; 20import android.content.Context; 21import android.content.SharedPreferences; 22import android.content.SharedPreferences.Editor; 23import android.hardware.Camera.CameraInfo; 24import android.hardware.Camera.Parameters; 25import android.hardware.Camera.Size; 26import android.media.CamcorderProfile; 27import android.util.Log; 28 29import java.util.ArrayList; 30import java.util.List; 31 32/** 33 * Provides utilities and keys for Camera settings. 34 */ 35public class CameraSettings { 36 private static final int NOT_FOUND = -1; 37 38 public static final String KEY_VERSION = "pref_version_key"; 39 public static final String KEY_LOCAL_VERSION = "pref_local_version_key"; 40 public static final String KEY_RECORD_LOCATION = RecordLocationPreference.KEY; 41 public static final String KEY_VIDEO_QUALITY = "pref_video_quality_key"; 42 public static final String KEY_VIDEO_TIME_LAPSE_FRAME_INTERVAL = "pref_video_time_lapse_frame_interval_key"; 43 public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key"; 44 public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key"; 45 public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key"; 46 public static final String KEY_FLASH_MODE = "pref_camera_flashmode_key"; 47 public static final String KEY_VIDEOCAMERA_FLASH_MODE = "pref_camera_video_flashmode_key"; 48 public static final String KEY_WHITE_BALANCE = "pref_camera_whitebalance_key"; 49 public static final String KEY_SCENE_MODE = "pref_camera_scenemode_key"; 50 public static final String KEY_EXPOSURE = "pref_camera_exposure_key"; 51 public static final String KEY_CAMERA_ID = "pref_camera_id_key"; 52 53 public static final String EXPOSURE_DEFAULT_VALUE = "0"; 54 55 public static final int CURRENT_VERSION = 4; 56 public static final int CURRENT_LOCAL_VERSION = 1; 57 58 // max video duration in seconds for youtube. 59 private static final int YOUTUBE_VIDEO_DURATION = 15 * 60; // 15 mins 60 private static final int DEFAULT_VIDEO_DURATION = 0; // no limit 61 62 public static final String DEFAULT_VIDEO_QUALITY_VALUE = "high"; 63 64 private static final String TAG = "CameraSettings"; 65 66 private final Context mContext; 67 private final Parameters mParameters; 68 private final CameraInfo[] mCameraInfo; 69 private final int mCameraId; 70 71 public CameraSettings(Activity activity, Parameters parameters, 72 int cameraId, CameraInfo[] cameraInfo) { 73 mContext = activity; 74 mParameters = parameters; 75 mCameraId = cameraId; 76 mCameraInfo = cameraInfo; 77 } 78 79 public PreferenceGroup getPreferenceGroup(int preferenceRes) { 80 PreferenceInflater inflater = new PreferenceInflater(mContext); 81 PreferenceGroup group = 82 (PreferenceGroup) inflater.inflate(preferenceRes); 83 initPreference(group); 84 return group; 85 } 86 87 public static void initialCameraPictureSize( 88 Context context, Parameters parameters) { 89 // When launching the camera app first time, we will set the picture 90 // size to the first one in the list defined in "arrays.xml" and is also 91 // supported by the driver. 92 List<Size> supported = parameters.getSupportedPictureSizes(); 93 if (supported == null) return; 94 for (String candidate : context.getResources().getStringArray( 95 R.array.pref_camera_picturesize_entryvalues)) { 96 if (setCameraPictureSize(candidate, supported, parameters)) { 97 SharedPreferences.Editor editor = ComboPreferences 98 .get(context).edit(); 99 editor.putString(KEY_PICTURE_SIZE, candidate); 100 editor.apply(); 101 return; 102 } 103 } 104 Log.e(TAG, "No supported picture size found"); 105 } 106 107 public static void removePreferenceFromScreen( 108 PreferenceGroup group, String key) { 109 removePreference(group, key); 110 } 111 112 public static boolean setCameraPictureSize( 113 String candidate, List<Size> supported, Parameters parameters) { 114 int index = candidate.indexOf('x'); 115 if (index == NOT_FOUND) return false; 116 int width = Integer.parseInt(candidate.substring(0, index)); 117 int height = Integer.parseInt(candidate.substring(index + 1)); 118 for (Size size: supported) { 119 if (size.width == width && size.height == height) { 120 parameters.setPictureSize(width, height); 121 return true; 122 } 123 } 124 return false; 125 } 126 127 private void initPreference(PreferenceGroup group) { 128 ListPreference videoQuality = group.findPreference(KEY_VIDEO_QUALITY); 129 ListPreference timeLapseInterval = group.findPreference(KEY_VIDEO_TIME_LAPSE_FRAME_INTERVAL); 130 ListPreference pictureSize = group.findPreference(KEY_PICTURE_SIZE); 131 ListPreference whiteBalance = group.findPreference(KEY_WHITE_BALANCE); 132 ListPreference sceneMode = group.findPreference(KEY_SCENE_MODE); 133 ListPreference flashMode = group.findPreference(KEY_FLASH_MODE); 134 ListPreference focusMode = group.findPreference(KEY_FOCUS_MODE); 135 ListPreference exposure = group.findPreference(KEY_EXPOSURE); 136 IconListPreference cameraIdPref = 137 (IconListPreference)group.findPreference(KEY_CAMERA_ID); 138 ListPreference videoFlashMode = 139 group.findPreference(KEY_VIDEOCAMERA_FLASH_MODE); 140 141 // Since the screen could be loaded from different resources, we need 142 // to check if the preference is available here 143 if (videoQuality != null) { 144 initVideoQuality(videoQuality); 145 } 146 147 if (pictureSize != null) { 148 filterUnsupportedOptions(group, pictureSize, sizeListToStringList( 149 mParameters.getSupportedPictureSizes())); 150 } 151 if (whiteBalance != null) { 152 filterUnsupportedOptions(group, 153 whiteBalance, mParameters.getSupportedWhiteBalance()); 154 } 155 if (sceneMode != null) { 156 filterUnsupportedOptions(group, 157 sceneMode, mParameters.getSupportedSceneModes()); 158 } 159 if (flashMode != null) { 160 filterUnsupportedOptions(group, 161 flashMode, mParameters.getSupportedFlashModes()); 162 } 163 if (focusMode != null) { 164 filterUnsupportedOptions(group, 165 focusMode, mParameters.getSupportedFocusModes()); 166 } 167 if (videoFlashMode != null) { 168 filterUnsupportedOptions(group, 169 videoFlashMode, mParameters.getSupportedFlashModes()); 170 } 171 if (exposure != null) buildExposureCompensation(group, exposure); 172 if (cameraIdPref != null) buildCameraId(group, cameraIdPref); 173 174 if (timeLapseInterval != null) resetIfInvalid(timeLapseInterval); 175 } 176 177 private void buildExposureCompensation( 178 PreferenceGroup group, ListPreference exposure) { 179 int max = mParameters.getMaxExposureCompensation(); 180 int min = mParameters.getMinExposureCompensation(); 181 if (max == 0 && min == 0) { 182 removePreference(group, exposure.getKey()); 183 return; 184 } 185 float step = mParameters.getExposureCompensationStep(); 186 187 // show only integer values for exposure compensation 188 int maxValue = (int) Math.floor(max * step); 189 int minValue = (int) Math.ceil(min * step); 190 CharSequence entries[] = new CharSequence[maxValue - minValue + 1]; 191 CharSequence entryValues[] = new CharSequence[maxValue - minValue + 1]; 192 for (int i = minValue; i <= maxValue; ++i) { 193 entryValues[maxValue - i] = Integer.toString(Math.round(i / step)); 194 StringBuilder builder = new StringBuilder(); 195 if (i > 0) builder.append('+'); 196 entries[maxValue - i] = builder.append(i).toString(); 197 } 198 exposure.setEntries(entries); 199 exposure.setEntryValues(entryValues); 200 } 201 202 private void buildCameraId( 203 PreferenceGroup group, IconListPreference preference) { 204 int numOfCameras = mCameraInfo.length; 205 if (numOfCameras < 2) { 206 removePreference(group, preference.getKey()); 207 return; 208 } 209 210 CharSequence[] entryValues = new CharSequence[2]; 211 for (int i = 0 ; i < mCameraInfo.length ; ++i) { 212 int index = 213 (mCameraInfo[i].facing == CameraInfo.CAMERA_FACING_FRONT) 214 ? CameraInfo.CAMERA_FACING_FRONT 215 : CameraInfo.CAMERA_FACING_BACK; 216 if (entryValues[index] == null) { 217 entryValues[index] = "" + i; 218 if (entryValues[((index == 1) ? 0 : 1)] != null) break; 219 } 220 } 221 preference.setEntryValues(entryValues); 222 } 223 224 private static boolean removePreference(PreferenceGroup group, String key) { 225 for (int i = 0, n = group.size(); i < n; i++) { 226 CameraPreference child = group.get(i); 227 if (child instanceof PreferenceGroup) { 228 if (removePreference((PreferenceGroup) child, key)) { 229 return true; 230 } 231 } 232 if (child instanceof ListPreference && 233 ((ListPreference) child).getKey().equals(key)) { 234 group.removePreference(i); 235 return true; 236 } 237 } 238 return false; 239 } 240 241 private void filterUnsupportedOptions(PreferenceGroup group, 242 ListPreference pref, List<String> supported) { 243 244 // Remove the preference if the parameter is not supported or there is 245 // only one options for the settings. 246 if (supported == null || supported.size() <= 1) { 247 removePreference(group, pref.getKey()); 248 return; 249 } 250 251 pref.filterUnsupported(supported); 252 if (pref.getEntries().length <= 1) { 253 removePreference(group, pref.getKey()); 254 return; 255 } 256 257 resetIfInvalid(pref); 258 } 259 260 private void resetIfInvalid(ListPreference pref) { 261 // Set the value to the first entry if it is invalid. 262 String value = pref.getValue(); 263 if (pref.findIndexOfValue(value) == NOT_FOUND) { 264 pref.setValueIndex(0); 265 } 266 } 267 268 private static List<String> sizeListToStringList(List<Size> sizes) { 269 ArrayList<String> list = new ArrayList<String>(); 270 for (Size size : sizes) { 271 list.add(String.format("%dx%d", size.width, size.height)); 272 } 273 return list; 274 } 275 276 public static void upgradeLocalPreferences(SharedPreferences pref) { 277 int version; 278 try { 279 version = pref.getInt(KEY_LOCAL_VERSION, 0); 280 } catch (Exception ex) { 281 version = 0; 282 } 283 if (version == CURRENT_LOCAL_VERSION) return; 284 SharedPreferences.Editor editor = pref.edit(); 285 editor.putInt(KEY_LOCAL_VERSION, CURRENT_LOCAL_VERSION); 286 editor.apply(); 287 } 288 289 public static void upgradeGlobalPreferences(SharedPreferences pref) { 290 int version; 291 try { 292 version = pref.getInt(KEY_VERSION, 0); 293 } catch (Exception ex) { 294 version = 0; 295 } 296 if (version == CURRENT_VERSION) return; 297 298 SharedPreferences.Editor editor = pref.edit(); 299 if (version == 0) { 300 // We won't use the preference which change in version 1. 301 // So, just upgrade to version 1 directly 302 version = 1; 303 } 304 if (version == 1) { 305 // Change jpeg quality {65,75,85} to {normal,fine,superfine} 306 String quality = pref.getString(KEY_JPEG_QUALITY, "85"); 307 if (quality.equals("65")) { 308 quality = "normal"; 309 } else if (quality.equals("75")) { 310 quality = "fine"; 311 } else { 312 quality = "superfine"; 313 } 314 editor.putString(KEY_JPEG_QUALITY, quality); 315 version = 2; 316 } 317 if (version == 2) { 318 editor.putString(KEY_RECORD_LOCATION, 319 pref.getBoolean(KEY_RECORD_LOCATION, false) 320 ? RecordLocationPreference.VALUE_ON 321 : RecordLocationPreference.VALUE_NONE); 322 version = 3; 323 } 324 if (version == 3) { 325 // Just use video quality to replace it and 326 // ignore the current settings. 327 editor.remove("pref_camera_videoquality_key"); 328 editor.remove("pref_camera_video_duration_key"); 329 } 330 editor.putInt(KEY_VERSION, CURRENT_VERSION); 331 editor.apply(); 332 } 333 334 public static boolean getVideoQuality(Context context, String quality) { 335 return context.getString(R.string.pref_video_quality_youtube).equals(quality) 336 || context.getString(R.string.pref_video_quality_high).equals(quality); 337 } 338 339 public static int getVideoDurationInMillis(Context context, String quality, int cameraId) { 340 if (context.getString(R.string.pref_video_quality_mms).equals(quality)) { 341 int mmsVideoDuration = CamcorderProfile.get(cameraId, 342 CamcorderProfile.QUALITY_LOW).duration; 343 return mmsVideoDuration * 1000; 344 } else if (context.getString(R.string.pref_video_quality_youtube).equals(quality)) { 345 return YOUTUBE_VIDEO_DURATION * 1000; 346 } 347 return DEFAULT_VIDEO_DURATION; 348 } 349 350 public static int readPreferredCameraId(SharedPreferences pref) { 351 return Integer.parseInt(pref.getString(KEY_CAMERA_ID, "0")); 352 } 353 354 public static void writePreferredCameraId(SharedPreferences pref, 355 int cameraId) { 356 Editor editor = pref.edit(); 357 editor.putString(KEY_CAMERA_ID, Integer.toString(cameraId)); 358 editor.apply(); 359 } 360 361 362 public static void restorePreferences(Context context, 363 ComboPreferences preferences, Parameters parameters) { 364 int currentCameraId = readPreferredCameraId(preferences); 365 366 // Clear the preferences of both cameras. 367 int backCameraId = CameraHolder.instance().getBackCameraId(); 368 if (backCameraId != -1) { 369 preferences.setLocalId(context, backCameraId); 370 Editor editor = preferences.edit(); 371 editor.clear(); 372 editor.apply(); 373 } 374 int frontCameraId = CameraHolder.instance().getFrontCameraId(); 375 if (frontCameraId != -1) { 376 preferences.setLocalId(context, frontCameraId); 377 Editor editor = preferences.edit(); 378 editor.clear(); 379 editor.apply(); 380 } 381 382 // Switch back to the preferences of the current camera. Otherwise, 383 // we may write the preference to wrong camera later. 384 preferences.setLocalId(context, currentCameraId); 385 386 upgradeGlobalPreferences(preferences.getGlobal()); 387 upgradeLocalPreferences(preferences.getLocal()); 388 389 // Write back the current camera id because parameters are related to 390 // the camera. Otherwise, we may switch to the front camera but the 391 // initial picture size is that of the back camera. 392 initialCameraPictureSize(context, parameters); 393 writePreferredCameraId(preferences, currentCameraId); 394 } 395 396 private void initVideoQuality(ListPreference videoQuality) { 397 CharSequence[] entries = videoQuality.getEntries(); 398 CharSequence[] values = videoQuality.getEntryValues(); 399 if (Util.isMmsCapable(mContext)) { 400 int mmsVideoDuration = CamcorderProfile.get(mCameraId, 401 CamcorderProfile.QUALITY_LOW).duration; 402 // We need to fill in the device-dependent value (in seconds). 403 for (int i = 0; i < entries.length; ++i) { 404 if (mContext.getString(R.string.pref_video_quality_mms).equals(values[i])) { 405 entries[i] = entries[i].toString().replace( 406 "30", Integer.toString(mmsVideoDuration)); 407 break; 408 } 409 } 410 } else { 411 // The device does not support mms. Remove it. Using 412 // filterUnsupported is not efficient but adding a new method 413 // for remove is not worth it. 414 ArrayList<String> supported = new ArrayList<String>(); 415 for (int i = 0; i < entries.length; ++i) { 416 if (!mContext.getString(R.string.pref_video_quality_mms).equals(values[i])) { 417 supported.add(values[i].toString()); 418 } 419 } 420 videoQuality.filterUnsupported(supported); 421 } 422 } 423} 424