libs/camera/CameraParameters.cpp - platform/frameworks/base - Gitiles

 /*
 **
 ** Copyright 2008, 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.
 */

 #define LOG_TAG "CameraParams"
 #include <utils/Log.h>

 #include <string.h>
 #include <stdlib.h>
 #include <camera/CameraParameters.h>

 namespace android {
 // Parameter keys to communicate between camera application and driver.
 const char CameraParameters::KEY_PREVIEW_SIZE[] = "preview-size";
 const char CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES[] = "preview-size-values";
 const char CameraParameters::KEY_PREVIEW_FORMAT[] = "preview-format";
 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS[] = "preview-format-values";
 const char CameraParameters::KEY_PREVIEW_FRAME_RATE[] = "preview-frame-rate";
 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES[] = "preview-frame-rate-values";
 const char CameraParameters::KEY_PREVIEW_FPS_RANGE[] = "preview-fps-range";
 const char CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE[] = "preview-fps-range-values";
 const char CameraParameters::KEY_PICTURE_SIZE[] = "picture-size";
 const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values";
 const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format";
 const char CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS[] = "picture-format-values";
 const char CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH[] = "jpeg-thumbnail-width";
 const char CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT[] = "jpeg-thumbnail-height";
 const char CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES[] = "jpeg-thumbnail-size-values";
 const char CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY[] = "jpeg-thumbnail-quality";
 const char CameraParameters::KEY_JPEG_QUALITY[] = "jpeg-quality";
 const char CameraParameters::KEY_ROTATION[] = "rotation";
 const char CameraParameters::KEY_GPS_LATITUDE[] = "gps-latitude";
 const char CameraParameters::KEY_GPS_LONGITUDE[] = "gps-longitude";
 const char CameraParameters::KEY_GPS_ALTITUDE[] = "gps-altitude";
 const char CameraParameters::KEY_GPS_TIMESTAMP[] = "gps-timestamp";
 const char CameraParameters::KEY_GPS_PROCESSING_METHOD[] = "gps-processing-method";
 const char CameraParameters::KEY_WHITE_BALANCE[] = "whitebalance";
 const char CameraParameters::KEY_SUPPORTED_WHITE_BALANCE[] = "whitebalance-values";
 const char CameraParameters::KEY_EFFECT[] = "effect";
 const char CameraParameters::KEY_SUPPORTED_EFFECTS[] = "effect-values";
 const char CameraParameters::KEY_ANTIBANDING[] = "antibanding";
 const char CameraParameters::KEY_SUPPORTED_ANTIBANDING[] = "antibanding-values";
 const char CameraParameters::KEY_SCENE_MODE[] = "scene-mode";
 const char CameraParameters::KEY_SUPPORTED_SCENE_MODES[] = "scene-mode-values";
 const char CameraParameters::KEY_FLASH_MODE[] = "flash-mode";
 const char CameraParameters::KEY_SUPPORTED_FLASH_MODES[] = "flash-mode-values";
 const char CameraParameters::KEY_FOCUS_MODE[] = "focus-mode";
 const char CameraParameters::KEY_SUPPORTED_FOCUS_MODES[] = "focus-mode-values";
 const char CameraParameters::KEY_MAX_NUM_FOCUS_AREAS[] = "max-num-focus-areas";
 const char CameraParameters::KEY_FOCUS_AREAS[] = "focus-areas";
 const char CameraParameters::KEY_FOCAL_LENGTH[] = "focal-length";
 const char CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE[] = "horizontal-view-angle";
 const char CameraParameters::KEY_VERTICAL_VIEW_ANGLE[] = "vertical-view-angle";
 const char CameraParameters::KEY_EXPOSURE_COMPENSATION[] = "exposure-compensation";
 const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation";
 const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation";
 const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step";
 const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK[] = "auto-exposure-lock";
 const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK_SUPPORTED[] = "auto-exposure-lock-supported";
 const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK[] = "auto-whitebalance-lock";
 const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED[] = "auto-whitebalance-lock-supported";
 const char CameraParameters::KEY_MAX_NUM_METERING_AREAS[] = "max-num-metering-areas";
 const char CameraParameters::KEY_METERING_AREAS[] = "metering-areas";
 const char CameraParameters::KEY_ZOOM[] = "zoom";
 const char CameraParameters::KEY_MAX_ZOOM[] = "max-zoom";
 const char CameraParameters::KEY_ZOOM_RATIOS[] = "zoom-ratios";
 const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";
 const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";
 const char CameraParameters::KEY_FOCUS_DISTANCES[] = "focus-distances";
 const char CameraParameters::KEY_VIDEO_FRAME_FORMAT[] = "video-frame-format";
 const char CameraParameters::KEY_VIDEO_SIZE[] = "video-size";
 const char CameraParameters::KEY_SUPPORTED_VIDEO_SIZES[] = "video-size-values";
 const char CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO[] = "preferred-preview-size-for-video";
 const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_HW[] = "max-num-detected-faces-hw";
 const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_SW[] = "max-num-detected-faces-sw";

 const char CameraParameters::TRUE[] = "true";
 const char CameraParameters::FALSE[] = "false";
 const char CameraParameters::FOCUS_DISTANCE_INFINITY[] = "Infinity";

 // Values for white balance settings.
 const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";
 const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent";
 const char CameraParameters::WHITE_BALANCE_FLUORESCENT[] = "fluorescent";
 const char CameraParameters::WHITE_BALANCE_WARM_FLUORESCENT[] = "warm-fluorescent";
 const char CameraParameters::WHITE_BALANCE_DAYLIGHT[] = "daylight";
 const char CameraParameters::WHITE_BALANCE_CLOUDY_DAYLIGHT[] = "cloudy-daylight";
 const char CameraParameters::WHITE_BALANCE_TWILIGHT[] = "twilight";
 const char CameraParameters::WHITE_BALANCE_SHADE[] = "shade";

 // Values for effect settings.
 const char CameraParameters::EFFECT_NONE[] = "none";
 const char CameraParameters::EFFECT_MONO[] = "mono";
 const char CameraParameters::EFFECT_NEGATIVE[] = "negative";
 const char CameraParameters::EFFECT_SOLARIZE[] = "solarize";
 const char CameraParameters::EFFECT_SEPIA[] = "sepia";
 const char CameraParameters::EFFECT_POSTERIZE[] = "posterize";
 const char CameraParameters::EFFECT_WHITEBOARD[] = "whiteboard";
 const char CameraParameters::EFFECT_BLACKBOARD[] = "blackboard";
 const char CameraParameters::EFFECT_AQUA[] = "aqua";

 // Values for antibanding settings.
 const char CameraParameters::ANTIBANDING_AUTO[] = "auto";
 const char CameraParameters::ANTIBANDING_50HZ[] = "50hz";
 const char CameraParameters::ANTIBANDING_60HZ[] = "60hz";
 const char CameraParameters::ANTIBANDING_OFF[] = "off";

 // Values for flash mode settings.
 const char CameraParameters::FLASH_MODE_OFF[] = "off";
 const char CameraParameters::FLASH_MODE_AUTO[] = "auto";
 const char CameraParameters::FLASH_MODE_ON[] = "on";
 const char CameraParameters::FLASH_MODE_RED_EYE[] = "red-eye";
 const char CameraParameters::FLASH_MODE_TORCH[] = "torch";

 // Values for scene mode settings.
 const char CameraParameters::SCENE_MODE_AUTO[] = "auto";
 const char CameraParameters::SCENE_MODE_ACTION[] = "action";
 const char CameraParameters::SCENE_MODE_PORTRAIT[] = "portrait";
 const char CameraParameters::SCENE_MODE_LANDSCAPE[] = "landscape";
 const char CameraParameters::SCENE_MODE_NIGHT[] = "night";
 const char CameraParameters::SCENE_MODE_NIGHT_PORTRAIT[] = "night-portrait";
 const char CameraParameters::SCENE_MODE_THEATRE[] = "theatre";
 const char CameraParameters::SCENE_MODE_BEACH[] = "beach";
 const char CameraParameters::SCENE_MODE_SNOW[] = "snow";
 const char CameraParameters::SCENE_MODE_SUNSET[] = "sunset";
 const char CameraParameters::SCENE_MODE_STEADYPHOTO[] = "steadyphoto";
 const char CameraParameters::SCENE_MODE_FIREWORKS[] = "fireworks";
 const char CameraParameters::SCENE_MODE_SPORTS[] = "sports";
 const char CameraParameters::SCENE_MODE_PARTY[] = "party";
 const char CameraParameters::SCENE_MODE_CANDLELIGHT[] = "candlelight";
 const char CameraParameters::SCENE_MODE_BARCODE[] = "barcode";

 const char CameraParameters::PIXEL_FORMAT_YUV422SP[] = "yuv422sp";
 const char CameraParameters::PIXEL_FORMAT_YUV420SP[] = "yuv420sp";
 const char CameraParameters::PIXEL_FORMAT_YUV422I[] = "yuv422i-yuyv";
 const char CameraParameters::PIXEL_FORMAT_YUV420P[]  = "yuv420p";
 const char CameraParameters::PIXEL_FORMAT_RGB565[] = "rgb565";
 const char CameraParameters::PIXEL_FORMAT_RGBA8888[] = "rgba8888";
 const char CameraParameters::PIXEL_FORMAT_JPEG[] = "jpeg";

 // Values for focus mode settings.
 const char CameraParameters::FOCUS_MODE_AUTO[] = "auto";
 const char CameraParameters::FOCUS_MODE_INFINITY[] = "infinity";
 const char CameraParameters::FOCUS_MODE_MACRO[] = "macro";
 const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed";
 const char CameraParameters::FOCUS_MODE_EDOF[] = "edof";
 const char CameraParameters::FOCUS_MODE_CONTINUOUS_VIDEO[] = "continuous-video";

 CameraParameters::CameraParameters()
                 : mMap()
 {
 }

 CameraParameters::~CameraParameters()
 {
 }

 String8 CameraParameters::flatten() const
 {
     String8 flattened("");
     size_t size = mMap.size();

     for (size_t i = 0; i < size; i++) {
         String8 k, v;
         k = mMap.keyAt(i);
         v = mMap.valueAt(i);

         flattened += k;
         flattened += "=";
         flattened += v;
         if (i != size-1)
             flattened += ";";
     }

     return flattened;
 }

 void CameraParameters::unflatten(const String8 &params)
 {
     const char *a = params.string();
     const char *b;

     mMap.clear();

     for (;;) {
         // Find the bounds of the key name.
         b = strchr(a, '=');
         if (b == 0)
             break;

         // Create the key string.
         String8 k(a, (size_t)(b-a));

         // Find the value.
         a = b+1;
         b = strchr(a, ';');
         if (b == 0) {
             // If there's no semicolon, this is the last item.
             String8 v(a);
             mMap.add(k, v);
             break;
         }

         String8 v(a, (size_t)(b-a));
         mMap.add(k, v);
         a = b+1;
     }
 }


 void CameraParameters::set(const char *key, const char *value)
 {
     // XXX i think i can do this with strspn()
     if (strchr(key, '=') || strchr(key, ';')) {
         //XXX LOGE("Key \"%s\"contains invalid character (= or ;)", key);
         return;
     }

     if (strchr(value, '=') || strchr(key, ';')) {
         //XXX LOGE("Value \"%s\"contains invalid character (= or ;)", value);
         return;
     }

     mMap.replaceValueFor(String8(key), String8(value));
 }

 void CameraParameters::set(const char *key, int value)
 {
     char str[16];
     sprintf(str, "%d", value);
     set(key, str);
 }

 void CameraParameters::setFloat(const char *key, float value)
 {
     char str[16];  // 14 should be enough. We overestimate to be safe.
     snprintf(str, sizeof(str), "%g", value);
     set(key, str);
 }

 const char *CameraParameters::get(const char *key) const
 {
     String8 v = mMap.valueFor(String8(key));
     if (v.length() == 0)
         return 0;
     return v.string();
 }

 int CameraParameters::getInt(const char *key) const
 {
     const char *v = get(key);
     if (v == 0)
         return -1;
     return strtol(v, 0, 0);
 }

 float CameraParameters::getFloat(const char *key) const
 {
     const char *v = get(key);
     if (v == 0) return -1;
     return strtof(v, 0);
 }

 void CameraParameters::remove(const char *key)
 {
     mMap.removeItem(String8(key));
 }

 // Parse string like "640x480" or "10000,20000"
 static int parse_pair(const char *str, int *first, int *second, char delim,
                       char **endptr = NULL)
 {
     // Find the first integer.
     char *end;
     int w = (int)strtol(str, &end, 10);
     // If a delimeter does not immediately follow, give up.
     if (*end != delim) {
         LOGE("Cannot find delimeter (%c) in str=%s", delim, str);
         return -1;
     }

     // Find the second integer, immediately after the delimeter.
     int h = (int)strtol(end+1, &end, 10);

     *first = w;
     *second = h;

     if (endptr) {
         *endptr = end;
     }

     return 0;
 }

 static void parseSizesList(const char *sizesStr, Vector<Size> &sizes)
 {
     if (sizesStr == 0) {
         return;
     }

     char *sizeStartPtr = (char *)sizesStr;

     while (true) {
         int width, height;
         int success = parse_pair(sizeStartPtr, &width, &height, 'x',
                                  &sizeStartPtr);
         if (success == -1 || (*sizeStartPtr != ',' && *sizeStartPtr != '\0')) {
             LOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
             return;
         }
         sizes.push(Size(width, height));

         if (*sizeStartPtr == '\0') {
             return;
         }
         sizeStartPtr++;
     }
 }

 void CameraParameters::setPreviewSize(int width, int height)
 {
     char str[32];
     sprintf(str, "%dx%d", width, height);
     set(KEY_PREVIEW_SIZE, str);
 }

 void CameraParameters::getPreviewSize(int *width, int *height) const
 {
     *width = *height = -1;
     // Get the current string, if it doesn't exist, leave the -1x-1
     const char *p = get(KEY_PREVIEW_SIZE);
     if (p == 0)  return;
     parse_pair(p, width, height, 'x');
 }

 void CameraParameters::getPreferredPreviewSizeForVideo(int *width, int *height) const
 {
     *width = *height = -1;
     const char *p = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO);
     if (p == 0)  return;
     parse_pair(p, width, height, 'x');
 }

 void CameraParameters::getSupportedPreviewSizes(Vector<Size> &sizes) const
 {
     const char *previewSizesStr = get(KEY_SUPPORTED_PREVIEW_SIZES);
     parseSizesList(previewSizesStr, sizes);
 }

 void CameraParameters::setVideoSize(int width, int height)
 {
     char str[32];
     sprintf(str, "%dx%d", width, height);
     set(KEY_VIDEO_SIZE, str);
 }

 void CameraParameters::getVideoSize(int *width, int *height) const
 {
     *width = *height = -1;
     const char *p = get(KEY_VIDEO_SIZE);
     if (p == 0) return;
     parse_pair(p, width, height, 'x');
 }

 void CameraParameters::getSupportedVideoSizes(Vector<Size> &sizes) const
 {
     const char *videoSizesStr = get(KEY_SUPPORTED_VIDEO_SIZES);
     parseSizesList(videoSizesStr, sizes);
 }

 void CameraParameters::setPreviewFrameRate(int fps)
 {
     set(KEY_PREVIEW_FRAME_RATE, fps);
 }

 int CameraParameters::getPreviewFrameRate() const
 {
     return getInt(KEY_PREVIEW_FRAME_RATE);
 }

 void CameraParameters::getPreviewFpsRange(int *min_fps, int *max_fps) const
 {
     *min_fps = *max_fps = -1;
     const char *p = get(KEY_PREVIEW_FPS_RANGE);
     if (p == 0) return;
     parse_pair(p, min_fps, max_fps, ',');
 }

 void CameraParameters::setPreviewFormat(const char *format)
 {
     set(KEY_PREVIEW_FORMAT, format);
 }

 const char *CameraParameters::getPreviewFormat() const
 {
     return get(KEY_PREVIEW_FORMAT);
 }

 void CameraParameters::setPictureSize(int width, int height)
 {
     char str[32];
     sprintf(str, "%dx%d", width, height);
     set(KEY_PICTURE_SIZE, str);
 }

 void CameraParameters::getPictureSize(int *width, int *height) const
 {
     *width = *height = -1;
     // Get the current string, if it doesn't exist, leave the -1x-1
     const char *p = get(KEY_PICTURE_SIZE);
     if (p == 0) return;
     parse_pair(p, width, height, 'x');
 }

 void CameraParameters::getSupportedPictureSizes(Vector<Size> &sizes) const
 {
     const char *pictureSizesStr = get(KEY_SUPPORTED_PICTURE_SIZES);
     parseSizesList(pictureSizesStr, sizes);
 }

 void CameraParameters::setPictureFormat(const char *format)
 {
     set(KEY_PICTURE_FORMAT, format);
 }

 const char *CameraParameters::getPictureFormat() const
 {
     return get(KEY_PICTURE_FORMAT);
 }

 void CameraParameters::dump() const
 {
     LOGD("dump: mMap.size = %d", mMap.size());
     for (size_t i = 0; i < mMap.size(); i++) {
         String8 k, v;
         k = mMap.keyAt(i);
         v = mMap.valueAt(i);
         LOGD("%s: %s\n", k.string(), v.string());
     }
 }

 status_t CameraParameters::dump(int fd, const Vector<String16>& args) const
 {
     const size_t SIZE = 256;
     char buffer[SIZE];
     String8 result;
     snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %d\n", mMap.size());
     result.append(buffer);
     for (size_t i = 0; i < mMap.size(); i++) {
         String8 k, v;
         k = mMap.keyAt(i);
         v = mMap.valueAt(i);
         snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
         result.append(buffer);
     }
     write(fd, result.string(), result.size());
     return NO_ERROR;
 }

 }; // namespace android
	/*
	**
	** Copyright 2008, 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.
	*/

	#define LOG_TAG "CameraParams"
	#include <utils/Log.h>

	#include <string.h>
	#include <stdlib.h>
	#include <camera/CameraParameters.h>

	namespace android {
	// Parameter keys to communicate between camera application and driver.
	const char CameraParameters::KEY_PREVIEW_SIZE[] = "preview-size";
	const char CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES[] = "preview-size-values";
	const char CameraParameters::KEY_PREVIEW_FORMAT[] = "preview-format";
	const char CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS[] = "preview-format-values";
	const char CameraParameters::KEY_PREVIEW_FRAME_RATE[] = "preview-frame-rate";
	const char CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES[] = "preview-frame-rate-values";
	const char CameraParameters::KEY_PREVIEW_FPS_RANGE[] = "preview-fps-range";
	const char CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE[] = "preview-fps-range-values";
	const char CameraParameters::KEY_PICTURE_SIZE[] = "picture-size";
	const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values";
	const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format";
	const char CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS[] = "picture-format-values";
	const char CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH[] = "jpeg-thumbnail-width";
	const char CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT[] = "jpeg-thumbnail-height";
	const char CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES[] = "jpeg-thumbnail-size-values";
	const char CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY[] = "jpeg-thumbnail-quality";
	const char CameraParameters::KEY_JPEG_QUALITY[] = "jpeg-quality";
	const char CameraParameters::KEY_ROTATION[] = "rotation";
	const char CameraParameters::KEY_GPS_LATITUDE[] = "gps-latitude";
	const char CameraParameters::KEY_GPS_LONGITUDE[] = "gps-longitude";
	const char CameraParameters::KEY_GPS_ALTITUDE[] = "gps-altitude";
	const char CameraParameters::KEY_GPS_TIMESTAMP[] = "gps-timestamp";
	const char CameraParameters::KEY_GPS_PROCESSING_METHOD[] = "gps-processing-method";
	const char CameraParameters::KEY_WHITE_BALANCE[] = "whitebalance";
	const char CameraParameters::KEY_SUPPORTED_WHITE_BALANCE[] = "whitebalance-values";
	const char CameraParameters::KEY_EFFECT[] = "effect";
	const char CameraParameters::KEY_SUPPORTED_EFFECTS[] = "effect-values";
	const char CameraParameters::KEY_ANTIBANDING[] = "antibanding";
	const char CameraParameters::KEY_SUPPORTED_ANTIBANDING[] = "antibanding-values";
	const char CameraParameters::KEY_SCENE_MODE[] = "scene-mode";
	const char CameraParameters::KEY_SUPPORTED_SCENE_MODES[] = "scene-mode-values";
	const char CameraParameters::KEY_FLASH_MODE[] = "flash-mode";
	const char CameraParameters::KEY_SUPPORTED_FLASH_MODES[] = "flash-mode-values";
	const char CameraParameters::KEY_FOCUS_MODE[] = "focus-mode";
	const char CameraParameters::KEY_SUPPORTED_FOCUS_MODES[] = "focus-mode-values";
	const char CameraParameters::KEY_MAX_NUM_FOCUS_AREAS[] = "max-num-focus-areas";
	const char CameraParameters::KEY_FOCUS_AREAS[] = "focus-areas";
	const char CameraParameters::KEY_FOCAL_LENGTH[] = "focal-length";
	const char CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE[] = "horizontal-view-angle";
	const char CameraParameters::KEY_VERTICAL_VIEW_ANGLE[] = "vertical-view-angle";
	const char CameraParameters::KEY_EXPOSURE_COMPENSATION[] = "exposure-compensation";
	const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation";
	const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation";
	const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step";
	const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK[] = "auto-exposure-lock";
	const char CameraParameters::KEY_AUTO_EXPOSURE_LOCK_SUPPORTED[] = "auto-exposure-lock-supported";
	const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK[] = "auto-whitebalance-lock";
	const char CameraParameters::KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED[] = "auto-whitebalance-lock-supported";
	const char CameraParameters::KEY_MAX_NUM_METERING_AREAS[] = "max-num-metering-areas";
	const char CameraParameters::KEY_METERING_AREAS[] = "metering-areas";
	const char CameraParameters::KEY_ZOOM[] = "zoom";
	const char CameraParameters::KEY_MAX_ZOOM[] = "max-zoom";
	const char CameraParameters::KEY_ZOOM_RATIOS[] = "zoom-ratios";
	const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";
	const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";
	const char CameraParameters::KEY_FOCUS_DISTANCES[] = "focus-distances";
	const char CameraParameters::KEY_VIDEO_FRAME_FORMAT[] = "video-frame-format";
	const char CameraParameters::KEY_VIDEO_SIZE[] = "video-size";
	const char CameraParameters::KEY_SUPPORTED_VIDEO_SIZES[] = "video-size-values";
	const char CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO[] = "preferred-preview-size-for-video";
	const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_HW[] = "max-num-detected-faces-hw";
	const char CameraParameters::KEY_MAX_NUM_DETECTED_FACES_SW[] = "max-num-detected-faces-sw";

	const char CameraParameters::TRUE[] = "true";
	const char CameraParameters::FALSE[] = "false";
	const char CameraParameters::FOCUS_DISTANCE_INFINITY[] = "Infinity";

	// Values for white balance settings.
	const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";
	const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent";
	const char CameraParameters::WHITE_BALANCE_FLUORESCENT[] = "fluorescent";
	const char CameraParameters::WHITE_BALANCE_WARM_FLUORESCENT[] = "warm-fluorescent";
	const char CameraParameters::WHITE_BALANCE_DAYLIGHT[] = "daylight";
	const char CameraParameters::WHITE_BALANCE_CLOUDY_DAYLIGHT[] = "cloudy-daylight";
	const char CameraParameters::WHITE_BALANCE_TWILIGHT[] = "twilight";
	const char CameraParameters::WHITE_BALANCE_SHADE[] = "shade";

	// Values for effect settings.
	const char CameraParameters::EFFECT_NONE[] = "none";
	const char CameraParameters::EFFECT_MONO[] = "mono";
	const char CameraParameters::EFFECT_NEGATIVE[] = "negative";
	const char CameraParameters::EFFECT_SOLARIZE[] = "solarize";
	const char CameraParameters::EFFECT_SEPIA[] = "sepia";
	const char CameraParameters::EFFECT_POSTERIZE[] = "posterize";
	const char CameraParameters::EFFECT_WHITEBOARD[] = "whiteboard";
	const char CameraParameters::EFFECT_BLACKBOARD[] = "blackboard";
	const char CameraParameters::EFFECT_AQUA[] = "aqua";

	// Values for antibanding settings.
	const char CameraParameters::ANTIBANDING_AUTO[] = "auto";
	const char CameraParameters::ANTIBANDING_50HZ[] = "50hz";
	const char CameraParameters::ANTIBANDING_60HZ[] = "60hz";
	const char CameraParameters::ANTIBANDING_OFF[] = "off";

	// Values for flash mode settings.
	const char CameraParameters::FLASH_MODE_OFF[] = "off";
	const char CameraParameters::FLASH_MODE_AUTO[] = "auto";
	const char CameraParameters::FLASH_MODE_ON[] = "on";
	const char CameraParameters::FLASH_MODE_RED_EYE[] = "red-eye";
	const char CameraParameters::FLASH_MODE_TORCH[] = "torch";

	// Values for scene mode settings.
	const char CameraParameters::SCENE_MODE_AUTO[] = "auto";
	const char CameraParameters::SCENE_MODE_ACTION[] = "action";
	const char CameraParameters::SCENE_MODE_PORTRAIT[] = "portrait";
	const char CameraParameters::SCENE_MODE_LANDSCAPE[] = "landscape";
	const char CameraParameters::SCENE_MODE_NIGHT[] = "night";
	const char CameraParameters::SCENE_MODE_NIGHT_PORTRAIT[] = "night-portrait";
	const char CameraParameters::SCENE_MODE_THEATRE[] = "theatre";
	const char CameraParameters::SCENE_MODE_BEACH[] = "beach";
	const char CameraParameters::SCENE_MODE_SNOW[] = "snow";
	const char CameraParameters::SCENE_MODE_SUNSET[] = "sunset";
	const char CameraParameters::SCENE_MODE_STEADYPHOTO[] = "steadyphoto";
	const char CameraParameters::SCENE_MODE_FIREWORKS[] = "fireworks";
	const char CameraParameters::SCENE_MODE_SPORTS[] = "sports";
	const char CameraParameters::SCENE_MODE_PARTY[] = "party";
	const char CameraParameters::SCENE_MODE_CANDLELIGHT[] = "candlelight";
	const char CameraParameters::SCENE_MODE_BARCODE[] = "barcode";

	const char CameraParameters::PIXEL_FORMAT_YUV422SP[] = "yuv422sp";
	const char CameraParameters::PIXEL_FORMAT_YUV420SP[] = "yuv420sp";
	const char CameraParameters::PIXEL_FORMAT_YUV422I[] = "yuv422i-yuyv";
	const char CameraParameters::PIXEL_FORMAT_YUV420P[] = "yuv420p";
	const char CameraParameters::PIXEL_FORMAT_RGB565[] = "rgb565";
	const char CameraParameters::PIXEL_FORMAT_RGBA8888[] = "rgba8888";
	const char CameraParameters::PIXEL_FORMAT_JPEG[] = "jpeg";

	// Values for focus mode settings.
	const char CameraParameters::FOCUS_MODE_AUTO[] = "auto";
	const char CameraParameters::FOCUS_MODE_INFINITY[] = "infinity";
	const char CameraParameters::FOCUS_MODE_MACRO[] = "macro";
	const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed";
	const char CameraParameters::FOCUS_MODE_EDOF[] = "edof";
	const char CameraParameters::FOCUS_MODE_CONTINUOUS_VIDEO[] = "continuous-video";

	CameraParameters::CameraParameters()
	: mMap()
	{
	}

	CameraParameters::~CameraParameters()
	{
	}

	String8 CameraParameters::flatten() const
	{
	String8 flattened("");
	size_t size = mMap.size();

	for (size_t i = 0; i < size; i++) {
	String8 k, v;
	k = mMap.keyAt(i);
	v = mMap.valueAt(i);

	flattened += k;
	flattened += "=";
	flattened += v;
	if (i != size-1)
	flattened += ";";
	}

	return flattened;
	}

	void CameraParameters::unflatten(const String8 &params)
	{
	const char *a = params.string();
	const char *b;

	mMap.clear();

	for (;;) {
	// Find the bounds of the key name.
	b = strchr(a, '=');
	if (b == 0)
	break;

	// Create the key string.
	String8 k(a, (size_t)(b-a));

	// Find the value.
	a = b+1;
	b = strchr(a, ';');
	if (b == 0) {
	// If there's no semicolon, this is the last item.
	String8 v(a);
	mMap.add(k, v);
	break;
	}

	String8 v(a, (size_t)(b-a));
	mMap.add(k, v);
	a = b+1;
	}
	}


	void CameraParameters::set(const char key, const char value)
	{
	// XXX i think i can do this with strspn()
	if (strchr(key, '=') \|\| strchr(key, ';')) {
	//XXX LOGE("Key \"%s\"contains invalid character (= or ;)", key);
	return;
	}

	if (strchr(value, '=') \|\| strchr(key, ';')) {
	//XXX LOGE("Value \"%s\"contains invalid character (= or ;)", value);
	return;
	}

	mMap.replaceValueFor(String8(key), String8(value));
	}

	void CameraParameters::set(const char *key, int value)
	{
	char str[16];
	sprintf(str, "%d", value);
	set(key, str);
	}

	void CameraParameters::setFloat(const char *key, float value)
	{
	char str[16]; // 14 should be enough. We overestimate to be safe.
	snprintf(str, sizeof(str), "%g", value);
	set(key, str);
	}

	const char CameraParameters::get(const char key) const
	{
	String8 v = mMap.valueFor(String8(key));
	if (v.length() == 0)
	return 0;
	return v.string();
	}

	int CameraParameters::getInt(const char *key) const
	{
	const char *v = get(key);
	if (v == 0)
	return -1;
	return strtol(v, 0, 0);
	}

	float CameraParameters::getFloat(const char *key) const
	{
	const char *v = get(key);
	if (v == 0) return -1;
	return strtof(v, 0);
	}

	void CameraParameters::remove(const char *key)
	{
	mMap.removeItem(String8(key));
	}

	// Parse string like "640x480" or "10000,20000"
	static int parse_pair(const char str, int first, int *second, char delim,
	char **endptr = NULL)
	{
	// Find the first integer.
	char *end;
	int w = (int)strtol(str, &end, 10);
	// If a delimeter does not immediately follow, give up.
	if (*end != delim) {
	LOGE("Cannot find delimeter (%c) in str=%s", delim, str);
	return -1;
	}

	// Find the second integer, immediately after the delimeter.
	int h = (int)strtol(end+1, &end, 10);

	*first = w;
	*second = h;

	if (endptr) {
	*endptr = end;
	}

	return 0;
	}

	static void parseSizesList(const char *sizesStr, Vector<Size> &sizes)
	{
	if (sizesStr == 0) {
	return;
	}

	char sizeStartPtr = (char )sizesStr;

	while (true) {
	int width, height;
	int success = parse_pair(sizeStartPtr, &width, &height, 'x',
	&sizeStartPtr);
	if (success == -1 \|\| (sizeStartPtr != ',' && sizeStartPtr != '\0')) {
	LOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
	return;
	}
	sizes.push(Size(width, height));

	if (*sizeStartPtr == '\0') {
	return;
	}
	sizeStartPtr++;
	}
	}

	void CameraParameters::setPreviewSize(int width, int height)
	{
	char str[32];
	sprintf(str, "%dx%d", width, height);
	set(KEY_PREVIEW_SIZE, str);
	}

	void CameraParameters::getPreviewSize(int width, int height) const
	{
	width = height = -1;
	// Get the current string, if it doesn't exist, leave the -1x-1
	const char *p = get(KEY_PREVIEW_SIZE);
	if (p == 0) return;
	parse_pair(p, width, height, 'x');
	}

	void CameraParameters::getPreferredPreviewSizeForVideo(int width, int height) const
	{
	width = height = -1;
	const char *p = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO);
	if (p == 0) return;
	parse_pair(p, width, height, 'x');
	}

	void CameraParameters::getSupportedPreviewSizes(Vector<Size> &sizes) const
	{
	const char *previewSizesStr = get(KEY_SUPPORTED_PREVIEW_SIZES);
	parseSizesList(previewSizesStr, sizes);
	}

	void CameraParameters::setVideoSize(int width, int height)
	{
	char str[32];
	sprintf(str, "%dx%d", width, height);
	set(KEY_VIDEO_SIZE, str);
	}

	void CameraParameters::getVideoSize(int width, int height) const
	{
	width = height = -1;
	const char *p = get(KEY_VIDEO_SIZE);
	if (p == 0) return;
	parse_pair(p, width, height, 'x');
	}

	void CameraParameters::getSupportedVideoSizes(Vector<Size> &sizes) const
	{
	const char *videoSizesStr = get(KEY_SUPPORTED_VIDEO_SIZES);
	parseSizesList(videoSizesStr, sizes);
	}

	void CameraParameters::setPreviewFrameRate(int fps)
	{
	set(KEY_PREVIEW_FRAME_RATE, fps);
	}

	int CameraParameters::getPreviewFrameRate() const
	{
	return getInt(KEY_PREVIEW_FRAME_RATE);
	}

	void CameraParameters::getPreviewFpsRange(int min_fps, int max_fps) const
	{
	min_fps = max_fps = -1;
	const char *p = get(KEY_PREVIEW_FPS_RANGE);
	if (p == 0) return;
	parse_pair(p, min_fps, max_fps, ',');
	}

	void CameraParameters::setPreviewFormat(const char *format)
	{
	set(KEY_PREVIEW_FORMAT, format);
	}

	const char *CameraParameters::getPreviewFormat() const
	{
	return get(KEY_PREVIEW_FORMAT);
	}

	void CameraParameters::setPictureSize(int width, int height)
	{
	char str[32];
	sprintf(str, "%dx%d", width, height);
	set(KEY_PICTURE_SIZE, str);
	}

	void CameraParameters::getPictureSize(int width, int height) const
	{
	width = height = -1;
	// Get the current string, if it doesn't exist, leave the -1x-1
	const char *p = get(KEY_PICTURE_SIZE);
	if (p == 0) return;
	parse_pair(p, width, height, 'x');
	}

	void CameraParameters::getSupportedPictureSizes(Vector<Size> &sizes) const
	{
	const char *pictureSizesStr = get(KEY_SUPPORTED_PICTURE_SIZES);
	parseSizesList(pictureSizesStr, sizes);
	}

	void CameraParameters::setPictureFormat(const char *format)
	{
	set(KEY_PICTURE_FORMAT, format);
	}

	const char *CameraParameters::getPictureFormat() const
	{
	return get(KEY_PICTURE_FORMAT);
	}

	void CameraParameters::dump() const
	{
	LOGD("dump: mMap.size = %d", mMap.size());
	for (size_t i = 0; i < mMap.size(); i++) {
	String8 k, v;
	k = mMap.keyAt(i);
	v = mMap.valueAt(i);
	LOGD("%s: %s\n", k.string(), v.string());
	}
	}

	status_t CameraParameters::dump(int fd, const Vector<String16>& args) const
	{
	const size_t SIZE = 256;
	char buffer[SIZE];
	String8 result;
	snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %d\n", mMap.size());
	result.append(buffer);
	for (size_t i = 0; i < mMap.size(); i++) {
	String8 k, v;
	k = mMap.keyAt(i);
	v = mMap.valueAt(i);
	snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
	result.append(buffer);
	}
	write(fd, result.string(), result.size());
	return NO_ERROR;
	}

	}; // namespace android