CameraParameters.cpp revision 4f1bff97170d33575e55a8e110b097c05607095f
1/* 2** 3** Copyright 2008, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#define LOG_TAG "CameraParams" 19#include <utils/Log.h> 20 21#include <string.h> 22#include <stdlib.h> 23#include <camera/CameraParameters.h> 24 25namespace android { 26// Parameter keys to communicate between camera application and driver. 27const char CameraParameters::KEY_PREVIEW_SIZE[] = "preview-size"; 28const char CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES[] = "preview-size-values"; 29const char CameraParameters::KEY_PREVIEW_FORMAT[] = "preview-format"; 30const char CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS[] = "preview-format-values"; 31const char CameraParameters::KEY_PREVIEW_FRAME_RATE[] = "preview-frame-rate"; 32const char CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES[] = "preview-frame-rate-values"; 33const char CameraParameters::KEY_PICTURE_SIZE[] = "picture-size"; 34const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values"; 35const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format"; 36const char CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS[] = "picture-format-values"; 37const char CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH[] = "jpeg-thumbnail-width"; 38const char CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT[] = "jpeg-thumbnail-height"; 39const char CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES[] = "jpeg-thumbnail-size-values"; 40const char CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY[] = "jpeg-thumbnail-quality"; 41const char CameraParameters::KEY_JPEG_QUALITY[] = "jpeg-quality"; 42const char CameraParameters::KEY_ROTATION[] = "rotation"; 43const char CameraParameters::KEY_GPS_LATITUDE[] = "gps-latitude"; 44const char CameraParameters::KEY_GPS_LONGITUDE[] = "gps-longitude"; 45const char CameraParameters::KEY_GPS_ALTITUDE[] = "gps-altitude"; 46const char CameraParameters::KEY_GPS_TIMESTAMP[] = "gps-timestamp"; 47const char CameraParameters::KEY_WHITE_BALANCE[] = "whitebalance"; 48const char CameraParameters::KEY_SUPPORTED_WHITE_BALANCE[] = "whitebalance-values"; 49const char CameraParameters::KEY_EFFECT[] = "effect"; 50const char CameraParameters::KEY_SUPPORTED_EFFECTS[] = "effect-values"; 51const char CameraParameters::KEY_ANTIBANDING[] = "antibanding"; 52const char CameraParameters::KEY_SUPPORTED_ANTIBANDING[] = "antibanding-values"; 53const char CameraParameters::KEY_SCENE_MODE[] = "scene-mode"; 54const char CameraParameters::KEY_SUPPORTED_SCENE_MODES[] = "scene-mode-values"; 55const char CameraParameters::KEY_FLASH_MODE[] = "flash-mode"; 56const char CameraParameters::KEY_SUPPORTED_FLASH_MODES[] = "flash-mode-values"; 57const char CameraParameters::KEY_FOCUS_MODE[] = "focus-mode"; 58const char CameraParameters::KEY_SUPPORTED_FOCUS_MODES[] = "focus-mode-values"; 59const char CameraParameters::KEY_FOCAL_LENGTH[] = "focal-length"; 60const char CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE[] = "horizontal-view-angle"; 61const char CameraParameters::KEY_VERTICAL_VIEW_ANGLE[] = "vertical-view-angle"; 62const char CameraParameters::KEY_EXPOSURE_COMPENSATION[] = "exposure-compensation"; 63const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation"; 64const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation"; 65const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step"; 66 67// Values for white balance settings. 68const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto"; 69const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent"; 70const char CameraParameters::WHITE_BALANCE_FLUORESCENT[] = "fluorescent"; 71const char CameraParameters::WHITE_BALANCE_WARM_FLUORESCENT[] = "warm-fluorescent"; 72const char CameraParameters::WHITE_BALANCE_DAYLIGHT[] = "daylight"; 73const char CameraParameters::WHITE_BALANCE_CLOUDY_DAYLIGHT[] = "cloudy-daylight"; 74const char CameraParameters::WHITE_BALANCE_TWILIGHT[] = "twilight"; 75const char CameraParameters::WHITE_BALANCE_SHADE[] = "shade"; 76 77// Values for effect settings. 78const char CameraParameters::EFFECT_NONE[] = "none"; 79const char CameraParameters::EFFECT_MONO[] = "mono"; 80const char CameraParameters::EFFECT_NEGATIVE[] = "negative"; 81const char CameraParameters::EFFECT_SOLARIZE[] = "solarize"; 82const char CameraParameters::EFFECT_SEPIA[] = "sepia"; 83const char CameraParameters::EFFECT_POSTERIZE[] = "posterize"; 84const char CameraParameters::EFFECT_WHITEBOARD[] = "whiteboard"; 85const char CameraParameters::EFFECT_BLACKBOARD[] = "blackboard"; 86const char CameraParameters::EFFECT_AQUA[] = "aqua"; 87 88// Values for antibanding settings. 89const char CameraParameters::ANTIBANDING_AUTO[] = "auto"; 90const char CameraParameters::ANTIBANDING_50HZ[] = "50hz"; 91const char CameraParameters::ANTIBANDING_60HZ[] = "60hz"; 92const char CameraParameters::ANTIBANDING_OFF[] = "off"; 93 94// Values for flash mode settings. 95const char CameraParameters::FLASH_MODE_OFF[] = "off"; 96const char CameraParameters::FLASH_MODE_AUTO[] = "auto"; 97const char CameraParameters::FLASH_MODE_ON[] = "on"; 98const char CameraParameters::FLASH_MODE_RED_EYE[] = "red-eye"; 99const char CameraParameters::FLASH_MODE_TORCH[] = "torch"; 100 101// Values for scene mode settings. 102const char CameraParameters::SCENE_MODE_AUTO[] = "auto"; 103const char CameraParameters::SCENE_MODE_ACTION[] = "action"; 104const char CameraParameters::SCENE_MODE_PORTRAIT[] = "portrait"; 105const char CameraParameters::SCENE_MODE_LANDSCAPE[] = "landscape"; 106const char CameraParameters::SCENE_MODE_NIGHT[] = "night"; 107const char CameraParameters::SCENE_MODE_NIGHT_PORTRAIT[] = "night-portrait"; 108const char CameraParameters::SCENE_MODE_THEATRE[] = "theatre"; 109const char CameraParameters::SCENE_MODE_BEACH[] = "beach"; 110const char CameraParameters::SCENE_MODE_SNOW[] = "snow"; 111const char CameraParameters::SCENE_MODE_SUNSET[] = "sunset"; 112const char CameraParameters::SCENE_MODE_STEADYPHOTO[] = "steadyphoto"; 113const char CameraParameters::SCENE_MODE_FIREWORKS[] = "fireworks"; 114const char CameraParameters::SCENE_MODE_SPORTS[] = "sports"; 115const char CameraParameters::SCENE_MODE_PARTY[] = "party"; 116const char CameraParameters::SCENE_MODE_CANDLELIGHT[] = "candlelight"; 117 118// Formats for setPreviewFormat and setPictureFormat. 119const char CameraParameters::PIXEL_FORMAT_YUV422SP[] = "yuv422sp"; 120const char CameraParameters::PIXEL_FORMAT_YUV420SP[] = "yuv420sp"; 121const char CameraParameters::PIXEL_FORMAT_YUV422I[] = "yuv422i-yuyv"; 122const char CameraParameters::PIXEL_FORMAT_RGB565[] = "rgb565"; 123const char CameraParameters::PIXEL_FORMAT_JPEG[] = "jpeg"; 124 125// Values for focus mode settings. 126const char CameraParameters::FOCUS_MODE_AUTO[] = "auto"; 127const char CameraParameters::FOCUS_MODE_INFINITY[] = "infinity"; 128const char CameraParameters::FOCUS_MODE_MACRO[] = "macro"; 129const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed"; 130 131CameraParameters::CameraParameters() 132 : mMap() 133{ 134} 135 136CameraParameters::~CameraParameters() 137{ 138} 139 140String8 CameraParameters::flatten() const 141{ 142 String8 flattened(""); 143 size_t size = mMap.size(); 144 145 for (size_t i = 0; i < size; i++) { 146 String8 k, v; 147 k = mMap.keyAt(i); 148 v = mMap.valueAt(i); 149 150 flattened += k; 151 flattened += "="; 152 flattened += v; 153 if (i != size-1) 154 flattened += ";"; 155 } 156 157 return flattened; 158} 159 160void CameraParameters::unflatten(const String8 ¶ms) 161{ 162 const char *a = params.string(); 163 const char *b; 164 165 mMap.clear(); 166 167 for (;;) { 168 // Find the bounds of the key name. 169 b = strchr(a, '='); 170 if (b == 0) 171 break; 172 173 // Create the key string. 174 String8 k(a, (size_t)(b-a)); 175 176 // Find the value. 177 a = b+1; 178 b = strchr(a, ';'); 179 if (b == 0) { 180 // If there's no semicolon, this is the last item. 181 String8 v(a); 182 mMap.add(k, v); 183 break; 184 } 185 186 String8 v(a, (size_t)(b-a)); 187 mMap.add(k, v); 188 a = b+1; 189 } 190} 191 192 193void CameraParameters::set(const char *key, const char *value) 194{ 195 // XXX i think i can do this with strspn() 196 if (strchr(key, '=') || strchr(key, ';')) { 197 //XXX LOGE("Key \"%s\"contains invalid character (= or ;)", key); 198 return; 199 } 200 201 if (strchr(value, '=') || strchr(key, ';')) { 202 //XXX LOGE("Value \"%s\"contains invalid character (= or ;)", value); 203 return; 204 } 205 206 mMap.replaceValueFor(String8(key), String8(value)); 207} 208 209void CameraParameters::set(const char *key, int value) 210{ 211 char str[16]; 212 sprintf(str, "%d", value); 213 set(key, str); 214} 215 216void CameraParameters::setFloat(const char *key, float value) 217{ 218 char str[16]; // 14 should be enough. We overestimate to be safe. 219 snprintf(str, sizeof(str), "%g", value); 220 set(key, str); 221} 222 223const char *CameraParameters::get(const char *key) const 224{ 225 String8 v = mMap.valueFor(String8(key)); 226 if (v.length() == 0) 227 return 0; 228 return v.string(); 229} 230 231int CameraParameters::getInt(const char *key) const 232{ 233 const char *v = get(key); 234 if (v == 0) 235 return -1; 236 return strtol(v, 0, 0); 237} 238 239float CameraParameters::getFloat(const char *key) const 240{ 241 const char *v = get(key); 242 if (v == 0) return -1; 243 return strtof(v, 0); 244} 245 246static int parse_size(const char *str, int &width, int &height) 247{ 248 // Find the width. 249 char *end; 250 int w = (int)strtol(str, &end, 10); 251 // If an 'x' does not immediately follow, give up. 252 if (*end != 'x') 253 return -1; 254 255 // Find the height, immediately after the 'x'. 256 int h = (int)strtol(end+1, 0, 10); 257 258 width = w; 259 height = h; 260 261 return 0; 262} 263 264void CameraParameters::setPreviewSize(int width, int height) 265{ 266 char str[32]; 267 sprintf(str, "%dx%d", width, height); 268 set(KEY_PREVIEW_SIZE, str); 269} 270 271void CameraParameters::getPreviewSize(int *width, int *height) const 272{ 273 *width = -1; 274 *height = -1; 275 276 // Get the current string, if it doesn't exist, leave the -1x-1 277 const char *p = get(KEY_PREVIEW_SIZE); 278 if (p == 0) 279 return; 280 281 int w, h; 282 if (parse_size(p, w, h) == 0) { 283 *width = w; 284 *height = h; 285 } 286} 287 288void CameraParameters::setPreviewFrameRate(int fps) 289{ 290 set(KEY_PREVIEW_FRAME_RATE, fps); 291} 292 293int CameraParameters::getPreviewFrameRate() const 294{ 295 return getInt(KEY_PREVIEW_FRAME_RATE); 296} 297 298void CameraParameters::setPreviewFormat(const char *format) 299{ 300 set(KEY_PREVIEW_FORMAT, format); 301} 302 303const char *CameraParameters::getPreviewFormat() const 304{ 305 return get(KEY_PREVIEW_FORMAT); 306} 307 308void CameraParameters::setPictureSize(int width, int height) 309{ 310 char str[32]; 311 sprintf(str, "%dx%d", width, height); 312 set(KEY_PICTURE_SIZE, str); 313} 314 315void CameraParameters::getPictureSize(int *width, int *height) const 316{ 317 *width = -1; 318 *height = -1; 319 320 // Get the current string, if it doesn't exist, leave the -1x-1 321 const char *p = get(KEY_PICTURE_SIZE); 322 if (p == 0) 323 return; 324 325 int w, h; 326 if (parse_size(p, w, h) == 0) { 327 *width = w; 328 *height = h; 329 } 330} 331 332void CameraParameters::setPictureFormat(const char *format) 333{ 334 set(KEY_PICTURE_FORMAT, format); 335} 336 337const char *CameraParameters::getPictureFormat() const 338{ 339 return get(KEY_PICTURE_FORMAT); 340} 341 342void CameraParameters::dump() const 343{ 344 LOGD("dump: mMap.size = %d", mMap.size()); 345 for (size_t i = 0; i < mMap.size(); i++) { 346 String8 k, v; 347 k = mMap.keyAt(i); 348 v = mMap.valueAt(i); 349 LOGD("%s: %s\n", k.string(), v.string()); 350 } 351} 352 353status_t CameraParameters::dump(int fd, const Vector<String16>& args) const 354{ 355 const size_t SIZE = 256; 356 char buffer[SIZE]; 357 String8 result; 358 snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %d\n", mMap.size()); 359 result.append(buffer); 360 for (size_t i = 0; i < mMap.size(); i++) { 361 String8 k, v; 362 k = mMap.keyAt(i); 363 v = mMap.valueAt(i); 364 snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string()); 365 result.append(buffer); 366 } 367 write(fd, result.string(), result.size()); 368 return NO_ERROR; 369} 370 371}; // namespace android 372