camera/CameraParameters.cpp

   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 #include <system/graphics.h>
  25
  26 namespace android {
  27 // Parameter keys to communicate between camera application and driver.
  28 const char CameraParameters::KEY_PREVIEW_SIZE[] = "preview-size";
  29 const char CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES[] = "preview-size-values";
  30 const char CameraParameters::KEY_PREVIEW_FORMAT[] = "preview-format";
  31 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS[] = "preview-format-values";
  32 const char CameraParameters::KEY_PREVIEW_FRAME_RATE[] = "preview-frame-rate";
  33 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES[] = "preview-frame-rate-values";
  34 const char CameraParameters::KEY_PREVIEW_FPS_RANGE[] = "preview-fps-range";
  35 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE[] = "preview-fps-range-values";
  36 const char CameraParameters::KEY_PICTURE_SIZE[] = "picture-size";
  37 const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values";
  38 const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format";
  39 const char CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS[] = "picture-format-values";
  40 const char CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH[] = "jpeg-thumbnail-width";
  41 const char CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT[] = "jpeg-thumbnail-height";
  42 const char CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES[] = "jpeg-thumbnail-size-values";
  43 const char CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY[] = "jpeg-thumbnail-quality";
  44 const char CameraParameters::KEY_JPEG_QUALITY[] = "jpeg-quality";
  45 const char CameraParameters::KEY_ROTATION[] = "rotation";
  46 const char CameraParameters::KEY_GPS_LATITUDE[] = "gps-latitude";
  47 const char CameraParameters::KEY_GPS_LONGITUDE[] = "gps-longitude";
  48 const char CameraParameters::KEY_GPS_ALTITUDE[] = "gps-altitude";
  49 const char CameraParameters::KEY_GPS_TIMESTAMP[] = "gps-timestamp";
  50 const char CameraParameters::KEY_GPS_PROCESSING_METHOD[] = "gps-processing-method";
  51 const char CameraParameters::KEY_WHITE_BALANCE[] = "whitebalance";
  52 const char CameraParameters::KEY_SUPPORTED_WHITE_BALANCE[] = "whitebalance-values";
  53 const char CameraParameters::KEY_EFFECT[] = "effect";
  54 const char CameraParameters::KEY_SUPPORTED_EFFECTS[] = "effect-values";
  55 const char CameraParameters::KEY_ANTIBANDING[] = "antibanding";
  56 const char CameraParameters::KEY_SUPPORTED_ANTIBANDING[] = "antibanding-values";
  57 const char CameraParameters::KEY_SCENE_MODE[] = "scene-mode";
  58 const char CameraParameters::KEY_SUPPORTED_SCENE_MODES[] = "scene-mode-values";
  59 const char CameraParameters::KEY_FLASH_MODE[] = "flash-mode";
  60 const char CameraParameters::KEY_SUPPORTED_FLASH_MODES[] = "flash-mode-values";
  61 const char CameraParameters::KEY_FOCUS_MODE[] = "focus-mode";
  62 const char CameraParameters::KEY_SUPPORTED_FOCUS_MODES[] = "focus-mode-values";
  63 const char CameraParameters::KEY_MAX_NUM_FOCUS_AREAS[] = "max-num-focus-areas";
  64 const char CameraParameters::KEY_FOCUS_AREAS[] = "focus-areas";
  65 const char CameraParameters::KEY_FOCAL_LENGTH[] = "focal-length";
  66 const char CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE[] = "horizontal-view-angle";
  67 const char CameraParameters::KEY_VERTICAL_VIEW_ANGLE[] = "vertical-view-angle";
  68 const char CameraParameters::KEY_EXPOSURE_COMPENSATION[] = "exposure-compensation";
  69 const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation";
  70 const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation";
  71 const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step";
  72 const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK[] = "auto-exposure-lock";
  73 const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK_SUPPORTED[] = "auto-exposure-lock-supported";
  74 const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK[] = "auto-whitebalance-lock";
  75 const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED[] = "auto-whitebalance-lock-supported";
  76 const char CameraParameters::KEY_MAX_NUM_METERING_AREAS[] = "max-num-metering-areas";
  77 const char CameraParameters::KEY_METERING_AREAS[] = "metering-areas";
  78 const char CameraParameters::KEY_ZOOM[] = "zoom";
  79 const char CameraParameters::KEY_MAX_ZOOM[] = "max-zoom";
  80 const char CameraParameters::KEY_ZOOM_RATIOS[] = "zoom-ratios";
  81 const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";
  82 const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";
  83 const char CameraParameters::KEY_FOCUS_DISTANCES[] = "focus-distances";
  84 const char CameraParameters::KEY_VIDEO_FRAME_FORMAT[] = "video-frame-format";
  85 const char CameraParameters::KEY_VIDEO_SIZE[] = "video-size";
  86 const char CameraParameters::KEY_SUPPORTED_VIDEO_SIZES[] = "video-size-values";
  87 const char CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO[] = "preferred-preview-size-for-video";
  88 const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_HW[] = "max-num-detected-faces-hw";
  89 const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_SW[] = "max-num-detected-faces-sw";
  90 const char CameraParameters::KEY_RECORDING_HINT[] = "recording-hint";
  91 const char CameraParameters::KEY_VIDEO_SNAPSHOT_SUPPORTED[] = "video-snapshot-supported";
  92 const char CameraParameters::KEY_VIDEO_STABILIZATION[] = "video-stabilization";
  93 const char CameraParameters::KEY_VIDEO_STABILIZATION_SUPPORTED[] = "video-stabilization-supported";
  94 const char CameraParameters::KEY_LIGHTFX[] = "light-fx";
  95
  96 const char CameraParameters::TRUE[] = "true";
  97 const char CameraParameters::FALSE[] = "false";
  98 const char CameraParameters::FOCUS_DISTANCE_INFINITY[] = "Infinity";
  99
 100 // Values for white balance settings.
 101 const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";
 102 const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent";
 103 const char CameraParameters::WHITE_BALANCE_FLUORESCENT[] = "fluorescent";
 104 const char CameraParameters::WHITE_BALANCE_WARM_FLUORESCENT[] = "warm-fluorescent";
 105 const char CameraParameters::WHITE_BALANCE_DAYLIGHT[] = "daylight";
 106 const char CameraParameters::WHITE_BALANCE_CLOUDY_DAYLIGHT[] = "cloudy-daylight";
 107 const char CameraParameters::WHITE_BALANCE_TWILIGHT[] = "twilight";
 108 const char CameraParameters::WHITE_BALANCE_SHADE[] = "shade";
 109
 110 // Values for effect settings.
 111 const char CameraParameters::EFFECT_NONE[] = "none";
 112 const char CameraParameters::EFFECT_MONO[] = "mono";
 113 const char CameraParameters::EFFECT_NEGATIVE[] = "negative";
 114 const char CameraParameters::EFFECT_SOLARIZE[] = "solarize";
 115 const char CameraParameters::EFFECT_SEPIA[] = "sepia";
 116 const char CameraParameters::EFFECT_POSTERIZE[] = "posterize";
 117 const char CameraParameters::EFFECT_WHITEBOARD[] = "whiteboard";
 118 const char CameraParameters::EFFECT_BLACKBOARD[] = "blackboard";
 119 const char CameraParameters::EFFECT_AQUA[] = "aqua";
 120
 121 // Values for antibanding settings.
 122 const char CameraParameters::ANTIBANDING_AUTO[] = "auto";
 123 const char CameraParameters::ANTIBANDING_50HZ[] = "50hz";
 124 const char CameraParameters::ANTIBANDING_60HZ[] = "60hz";
 125 const char CameraParameters::ANTIBANDING_OFF[] = "off";
 126
 127 // Values for flash mode settings.
 128 const char CameraParameters::FLASH_MODE_OFF[] = "off";
 129 const char CameraParameters::FLASH_MODE_AUTO[] = "auto";
 130 const char CameraParameters::FLASH_MODE_ON[] = "on";
 131 const char CameraParameters::FLASH_MODE_RED_EYE[] = "red-eye";
 132 const char CameraParameters::FLASH_MODE_TORCH[] = "torch";
 133
 134 // Values for scene mode settings.
 135 const char CameraParameters::SCENE_MODE_AUTO[] = "auto";
 136 const char CameraParameters::SCENE_MODE_ACTION[] = "action";
 137 const char CameraParameters::SCENE_MODE_PORTRAIT[] = "portrait";
 138 const char CameraParameters::SCENE_MODE_LANDSCAPE[] = "landscape";
 139 const char CameraParameters::SCENE_MODE_NIGHT[] = "night";
 140 const char CameraParameters::SCENE_MODE_NIGHT_PORTRAIT[] = "night-portrait";
 141 const char CameraParameters::SCENE_MODE_THEATRE[] = "theatre";
 142 const char CameraParameters::SCENE_MODE_BEACH[] = "beach";
 143 const char CameraParameters::SCENE_MODE_SNOW[] = "snow";
 144 const char CameraParameters::SCENE_MODE_SUNSET[] = "sunset";
 145 const char CameraParameters::SCENE_MODE_STEADYPHOTO[] = "steadyphoto";
 146 const char CameraParameters::SCENE_MODE_FIREWORKS[] = "fireworks";
 147 const char CameraParameters::SCENE_MODE_SPORTS[] = "sports";
 148 const char CameraParameters::SCENE_MODE_PARTY[] = "party";
 149 const char CameraParameters::SCENE_MODE_CANDLELIGHT[] = "candlelight";
 150 const char CameraParameters::SCENE_MODE_BARCODE[] = "barcode";
 151 const char CameraParameters::SCENE_MODE_HDR[] = "hdr";
 152
 153 const char CameraParameters::PIXEL_FORMAT_YUV422SP[] = "yuv422sp";
 154 const char CameraParameters::PIXEL_FORMAT_YUV420SP[] = "yuv420sp";
 155 const char CameraParameters::PIXEL_FORMAT_YUV422I[] = "yuv422i-yuyv";
 156 const char CameraParameters::PIXEL_FORMAT_YUV420P[]  = "yuv420p";
 157 const char CameraParameters::PIXEL_FORMAT_RGB565[] = "rgb565";
 158 const char CameraParameters::PIXEL_FORMAT_RGBA8888[] = "rgba8888";
 159 const char CameraParameters::PIXEL_FORMAT_JPEG[] = "jpeg";
 160 const char CameraParameters::PIXEL_FORMAT_BAYER_RGGB[] = "bayer-rggb";
 161 const char CameraParameters::PIXEL_FORMAT_ANDROID_OPAQUE[] = "android-opaque";
 162
 163 // Values for focus mode settings.
 164 const char CameraParameters::FOCUS_MODE_AUTO[] = "auto";
 165 const char CameraParameters::FOCUS_MODE_INFINITY[] = "infinity";
 166 const char CameraParameters::FOCUS_MODE_MACRO[] = "macro";
 167 const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed";
 168 const char CameraParameters::FOCUS_MODE_EDOF[] = "edof";
 169 const char CameraParameters::FOCUS_MODE_CONTINUOUS_VIDEO[] = "continuous-video";
 170 const char CameraParameters::FOCUS_MODE_CONTINUOUS_PICTURE[] = "continuous-picture";
 171
 172 // Values for light fx settings
 173 const char CameraParameters::LIGHTFX_LOWLIGHT[] = "low-light";
 174 const char CameraParameters::LIGHTFX_HDR[] = "high-dynamic-range";
 175
 176 CameraParameters::CameraParameters()
 177                 : mMap()
 178 {
 179 }
 180
 181 CameraParameters::~CameraParameters()
 182 {
 183 }
 184
 185 String8 CameraParameters::flatten() const
 186 {
 187     String8 flattened("");
 188     size_t size = mMap.size();
 189
 190     for (size_t i = 0; i < size; i++) {
 191         String8 k, v;
 192         k = mMap.keyAt(i);
 193         v = mMap.valueAt(i);
 194
 195         flattened += k;
 196         flattened += "=";
 197         flattened += v;
 198         if (i != size-1)
 199             flattened += ";";
 200     }
 201
 202     return flattened;
 203 }
 204
 205 void CameraParameters::unflatten(const String8 &params)
 206 {
 207     const char *a = params.string();
 208     const char *b;
 209
 210     mMap.clear();
 211
 212     for (;;) {
 213         // Find the bounds of the key name.
 214         b = strchr(a, '=');
 215         if (b == 0)
 216             break;
 217
 218         // Create the key string.
 219         String8 k(a, (size_t)(b-a));
 220
 221         // Find the value.
 222         a = b+1;
 223         b = strchr(a, ';');
 224         if (b == 0) {
 225             // If there's no semicolon, this is the last item.
 226             String8 v(a);
 227             mMap.add(k, v);
 228             break;
 229         }
 230
 231         String8 v(a, (size_t)(b-a));
 232         mMap.add(k, v);
 233         a = b+1;
 234     }
 235 }
 236
 237
 238 void CameraParameters::set(const char *key, const char *value)
 239 {
 240     // XXX i think i can do this with strspn()
 241     if (strchr(key, '=') || strchr(key, ';')) {
 242         //XXX ALOGE("Key \"%s\"contains invalid character (= or ;)", key);
 243         return;
 244     }
 245
 246     if (strchr(value, '=') || strchr(value, ';')) {
 247         //XXX ALOGE("Value \"%s\"contains invalid character (= or ;)", value);
 248         return;
 249     }
 250
 251     mMap.replaceValueFor(String8(key), String8(value));
 252 }
 253
 254 void CameraParameters::set(const char *key, int value)
 255 {
 256     char str[16];
 257     sprintf(str, "%d", value);
 258     set(key, str);
 259 }
 260
 261 void CameraParameters::setFloat(const char *key, float value)
 262 {
 263     char str[16];  // 14 should be enough. We overestimate to be safe.
 264     snprintf(str, sizeof(str), "%g", value);
 265     set(key, str);
 266 }
 267
 268 const char *CameraParameters::get(const char *key) const
 269 {
 270     String8 v = mMap.valueFor(String8(key));
 271     if (v.length() == 0)
 272         return 0;
 273     return v.string();
 274 }
 275
 276 int CameraParameters::getInt(const char *key) const
 277 {
 278     const char *v = get(key);
 279     if (v == 0)
 280         return -1;
 281     return strtol(v, 0, 0);
 282 }
 283
 284 float CameraParameters::getFloat(const char *key) const
 285 {
 286     const char *v = get(key);
 287     if (v == 0) return -1;
 288     return strtof(v, 0);
 289 }
 290
 291 void CameraParameters::remove(const char *key)
 292 {
 293     mMap.removeItem(String8(key));
 294 }
 295
 296 // Parse string like "640x480" or "10000,20000"
 297 static int parse_pair(const char *str, int *first, int *second, char delim,
 298                       char **endptr = NULL)
 299 {
 300     // Find the first integer.
 301     char *end;
 302     int w = (int)strtol(str, &end, 10);
 303     // If a delimeter does not immediately follow, give up.
 304     if (*end != delim) {
 305         ALOGE("Cannot find delimeter (%c) in str=%s", delim, str);
 306         return -1;
 307     }
 308
 309     // Find the second integer, immediately after the delimeter.
 310     int h = (int)strtol(end+1, &end, 10);
 311
 312     *first = w;
 313     *second = h;
 314
 315     if (endptr) {
 316         *endptr = end;
 317     }
 318
 319     return 0;
 320 }
 321
 322 static void parseSizesList(const char *sizesStr, Vector<Size> &sizes)
 323 {
 324     if (sizesStr == 0) {
 325         return;
 326     }
 327
 328     char *sizeStartPtr = (char *)sizesStr;
 329
 330     while (true) {
 331         int width, height;
 332         int success = parse_pair(sizeStartPtr, &width, &height, 'x',
 333                                  &sizeStartPtr);
 334         if (success == -1 || (*sizeStartPtr != ',' && *sizeStartPtr != '\0')) {
 335             ALOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
 336             return;
 337         }
 338         sizes.push(Size(width, height));
 339
 340         if (*sizeStartPtr == '\0') {
 341             return;
 342         }
 343         sizeStartPtr++;
 344     }
 345 }
 346
 347 void CameraParameters::setPreviewSize(int width, int height)
 348 {
 349     char str[32];
 350     sprintf(str, "%dx%d", width, height);
 351     set(KEY_PREVIEW_SIZE, str);
 352 }
 353
 354 void CameraParameters::getPreviewSize(int *width, int *height) const
 355 {
 356     *width = *height = -1;
 357     // Get the current string, if it doesn't exist, leave the -1x-1
 358     const char *p = get(KEY_PREVIEW_SIZE);
 359     if (p == 0)  return;
 360     parse_pair(p, width, height, 'x');
 361 }
 362
 363 void CameraParameters::getPreferredPreviewSizeForVideo(int *width, int *height) const
 364 {
 365     *width = *height = -1;
 366     const char *p = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO);
 367     if (p == 0)  return;
 368     parse_pair(p, width, height, 'x');
 369 }
 370
 371 void CameraParameters::getSupportedPreviewSizes(Vector<Size> &sizes) const
 372 {
 373     const char *previewSizesStr = get(KEY_SUPPORTED_PREVIEW_SIZES);
 374     parseSizesList(previewSizesStr, sizes);
 375 }
 376
 377 void CameraParameters::setVideoSize(int width, int height)
 378 {
 379     char str[32];
 380     sprintf(str, "%dx%d", width, height);
 381     set(KEY_VIDEO_SIZE, str);
 382 }
 383
 384 void CameraParameters::getVideoSize(int *width, int *height) const
 385 {
 386     *width = *height = -1;
 387     const char *p = get(KEY_VIDEO_SIZE);
 388     if (p == 0) return;
 389     parse_pair(p, width, height, 'x');
 390 }
 391
 392 void CameraParameters::getSupportedVideoSizes(Vector<Size> &sizes) const
 393 {
 394     const char *videoSizesStr = get(KEY_SUPPORTED_VIDEO_SIZES);
 395     parseSizesList(videoSizesStr, sizes);
 396 }
 397
 398 void CameraParameters::setPreviewFrameRate(int fps)
 399 {
 400     set(KEY_PREVIEW_FRAME_RATE, fps);
 401 }
 402
 403 int CameraParameters::getPreviewFrameRate() const
 404 {
 405     return getInt(KEY_PREVIEW_FRAME_RATE);
 406 }
 407
 408 void CameraParameters::getPreviewFpsRange(int *min_fps, int *max_fps) const
 409 {
 410     *min_fps = *max_fps = -1;
 411     const char *p = get(KEY_PREVIEW_FPS_RANGE);
 412     if (p == 0) return;
 413     parse_pair(p, min_fps, max_fps, ',');
 414 }
 415
 416 void CameraParameters::setPreviewFormat(const char *format)
 417 {
 418     set(KEY_PREVIEW_FORMAT, format);
 419 }
 420
 421 const char *CameraParameters::getPreviewFormat() const
 422 {
 423     return get(KEY_PREVIEW_FORMAT);
 424 }
 425
 426 void CameraParameters::setPictureSize(int width, int height)
 427 {
 428     char str[32];
 429     sprintf(str, "%dx%d", width, height);
 430     set(KEY_PICTURE_SIZE, str);
 431 }
 432
 433 void CameraParameters::getPictureSize(int *width, int *height) const
 434 {
 435     *width = *height = -1;
 436     // Get the current string, if it doesn't exist, leave the -1x-1
 437     const char *p = get(KEY_PICTURE_SIZE);
 438     if (p == 0) return;
 439     parse_pair(p, width, height, 'x');
 440 }
 441
 442 void CameraParameters::getSupportedPictureSizes(Vector<Size> &sizes) const
 443 {
 444     const char *pictureSizesStr = get(KEY_SUPPORTED_PICTURE_SIZES);
 445     parseSizesList(pictureSizesStr, sizes);
 446 }
 447
 448 void CameraParameters::setPictureFormat(const char *format)
 449 {
 450     set(KEY_PICTURE_FORMAT, format);
 451 }
 452
 453 const char *CameraParameters::getPictureFormat() const
 454 {
 455     return get(KEY_PICTURE_FORMAT);
 456 }
 457
 458 void CameraParameters::dump() const
 459 {
 460     ALOGD("dump: mMap.size = %zu", mMap.size());
 461     for (size_t i = 0; i < mMap.size(); i++) {
 462         String8 k, v;
 463         k = mMap.keyAt(i);
 464         v = mMap.valueAt(i);
 465         ALOGD("%s: %s\n", k.string(), v.string());
 466     }
 467 }
 468
 469 status_t CameraParameters::dump(int fd, const Vector<String16>& /*args*/) const
 470 {
 471     const size_t SIZE = 256;
 472     char buffer[SIZE];
 473     String8 result;
 474     snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %zu\n", mMap.size());
 475     result.append(buffer);
 476     for (size_t i = 0; i < mMap.size(); i++) {
 477         String8 k, v;
 478         k = mMap.keyAt(i);
 479         v = mMap.valueAt(i);
 480         snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
 481         result.append(buffer);
 482     }
 483     write(fd, result.string(), result.size());
 484     return NO_ERROR;
 485 }
 486
 487 void CameraParameters::getSupportedPreviewFormats(Vector<int>& formats) const {
 488     const char* supportedPreviewFormats =
 489           get(CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS);
 490
 491     if (supportedPreviewFormats == NULL) {
 492         ALOGW("%s: No supported preview formats.", __FUNCTION__);
 493         return;
 494     }
 495
 496     String8 fmtStr(supportedPreviewFormats);
 497     char* prevFmts = fmtStr.lockBuffer(fmtStr.size());
 498
 499     char* savePtr;
 500     char* fmt = strtok_r(prevFmts, ",", &savePtr);
 501     while (fmt) {
 502         int actual = previewFormatToEnum(fmt);
 503         if (actual != -1) {
 504             formats.add(actual);
 505         }
 506         fmt = strtok_r(NULL, ",", &savePtr);
 507     }
 508     fmtStr.unlockBuffer(fmtStr.size());
 509 }
 510
 511
 512 int CameraParameters::previewFormatToEnum(const char* format) {
 513     return
 514         !format ?
 515             HAL_PIXEL_FORMAT_YCrCb_420_SP :
 516         !strcmp(format, PIXEL_FORMAT_YUV422SP) ?
 517             HAL_PIXEL_FORMAT_YCbCr_422_SP : // NV16
 518         !strcmp(format, PIXEL_FORMAT_YUV420SP) ?
 519             HAL_PIXEL_FORMAT_YCrCb_420_SP : // NV21
 520         !strcmp(format, PIXEL_FORMAT_YUV422I) ?
 521             HAL_PIXEL_FORMAT_YCbCr_422_I :  // YUY2
 522         !strcmp(format, PIXEL_FORMAT_YUV420P) ?
 523             HAL_PIXEL_FORMAT_YV12 :         // YV12
 524         !strcmp(format, PIXEL_FORMAT_RGB565) ?
 525             HAL_PIXEL_FORMAT_RGB_565 :      // RGB565
 526         !strcmp(format, PIXEL_FORMAT_RGBA8888) ?
 527             HAL_PIXEL_FORMAT_RGBA_8888 :    // RGB8888
 528         !strcmp(format, PIXEL_FORMAT_BAYER_RGGB) ?
 529             HAL_PIXEL_FORMAT_RAW16 :   // Raw sensor data
 530         -1;
 531 }
 532
 533 bool CameraParameters::isEmpty() const {
 534     return mMap.isEmpty();
 535 }
 536
 537 }; // namespace android