1 | /*
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2 | * Copyright 2002-2012 Drew Noakes
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | *
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16 | * More information about this project is available at:
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17 | *
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18 | * http://drewnoakes.com/code/exif/
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19 | * http://code.google.com/p/metadata-extractor/
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20 | */
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21 | package com.drew.metadata.exif;
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22 |
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23 | import com.drew.imaging.PhotographicConversions;
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24 | import com.drew.lang.Rational;
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25 | import com.drew.lang.annotations.NotNull;
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26 | import com.drew.lang.annotations.Nullable;
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27 | import com.drew.metadata.TagDescriptor;
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28 |
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29 | import java.io.UnsupportedEncodingException;
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30 | import java.text.DecimalFormat;
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31 | import java.util.HashMap;
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32 | import java.util.Map;
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33 |
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34 | /**
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35 | * Provides human-readable string representations of tag values stored in a <code>ExifSubIFDDirectory</code>.
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36 | *
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37 | * @author Drew Noakes http://drewnoakes.com
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38 | */
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39 | public class ExifSubIFDDescriptor extends TagDescriptor<ExifSubIFDDirectory>
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40 | {
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41 | /**
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42 | * Dictates whether rational values will be represented in decimal format in instances
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43 | * where decimal notation is elegant (such as 1/2 -> 0.5, but not 1/3).
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44 | */
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45 | private final boolean _allowDecimalRepresentationOfRationals = true;
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46 |
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47 | @NotNull
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48 | private static final java.text.DecimalFormat SimpleDecimalFormatter = new DecimalFormat("0.#");
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49 |
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50 | public ExifSubIFDDescriptor(@NotNull ExifSubIFDDirectory directory)
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51 | {
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52 | super(directory);
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53 | }
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54 |
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55 | // Note for the potential addition of brightness presentation in eV:
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56 | // Brightness of taken subject. To calculate Exposure(Ev) from BrightnessValue(Bv),
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57 | // you must add SensitivityValue(Sv).
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58 | // Ev=BV+Sv Sv=log2(ISOSpeedRating/3.125)
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59 | // ISO100:Sv=5, ISO200:Sv=6, ISO400:Sv=7, ISO125:Sv=5.32.
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60 |
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61 | /**
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62 | * Returns a descriptive value of the the specified tag for this image.
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63 | * Where possible, known values will be substituted here in place of the raw
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64 | * tokens actually kept in the Exif segment. If no substitution is
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65 | * available, the value provided by getString(int) will be returned.
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66 | * @param tagType the tag to find a description for
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67 | * @return a description of the image's value for the specified tag, or
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68 | * <code>null</code> if the tag hasn't been defined.
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69 | */
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70 | @Nullable
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71 | public String getDescription(int tagType)
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72 | {
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73 | switch (tagType) {
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74 | case ExifSubIFDDirectory.TAG_NEW_SUBFILE_TYPE:
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75 | return getNewSubfileTypeDescription();
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76 | case ExifSubIFDDirectory.TAG_SUBFILE_TYPE:
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77 | return getSubfileTypeDescription();
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78 | case ExifSubIFDDirectory.TAG_THRESHOLDING:
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79 | return getThresholdingDescription();
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80 | case ExifSubIFDDirectory.TAG_FILL_ORDER:
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81 | return getFillOrderDescription();
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82 | case ExifSubIFDDirectory.TAG_EXPOSURE_TIME:
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83 | return getExposureTimeDescription();
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84 | case ExifSubIFDDirectory.TAG_SHUTTER_SPEED:
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85 | return getShutterSpeedDescription();
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86 | case ExifSubIFDDirectory.TAG_FNUMBER:
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87 | return getFNumberDescription();
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88 | case ExifSubIFDDirectory.TAG_COMPRESSED_AVERAGE_BITS_PER_PIXEL:
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89 | return getCompressedAverageBitsPerPixelDescription();
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90 | case ExifSubIFDDirectory.TAG_SUBJECT_DISTANCE:
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91 | return getSubjectDistanceDescription();
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92 | case ExifSubIFDDirectory.TAG_METERING_MODE:
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93 | return getMeteringModeDescription();
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94 | case ExifSubIFDDirectory.TAG_WHITE_BALANCE:
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95 | return getWhiteBalanceDescription();
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96 | case ExifSubIFDDirectory.TAG_FLASH:
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97 | return getFlashDescription();
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98 | case ExifSubIFDDirectory.TAG_FOCAL_LENGTH:
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99 | return getFocalLengthDescription();
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100 | case ExifSubIFDDirectory.TAG_COLOR_SPACE:
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101 | return getColorSpaceDescription();
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102 | case ExifSubIFDDirectory.TAG_EXIF_IMAGE_WIDTH:
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103 | return getExifImageWidthDescription();
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104 | case ExifSubIFDDirectory.TAG_EXIF_IMAGE_HEIGHT:
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105 | return getExifImageHeightDescription();
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106 | case ExifSubIFDDirectory.TAG_FOCAL_PLANE_UNIT:
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107 | return getFocalPlaneResolutionUnitDescription();
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108 | case ExifSubIFDDirectory.TAG_FOCAL_PLANE_X_RES:
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109 | return getFocalPlaneXResolutionDescription();
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110 | case ExifSubIFDDirectory.TAG_FOCAL_PLANE_Y_RES:
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111 | return getFocalPlaneYResolutionDescription();
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112 | case ExifSubIFDDirectory.TAG_BITS_PER_SAMPLE:
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113 | return getBitsPerSampleDescription();
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114 | case ExifSubIFDDirectory.TAG_PHOTOMETRIC_INTERPRETATION:
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115 | return getPhotometricInterpretationDescription();
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116 | case ExifSubIFDDirectory.TAG_ROWS_PER_STRIP:
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117 | return getRowsPerStripDescription();
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118 | case ExifSubIFDDirectory.TAG_STRIP_BYTE_COUNTS:
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119 | return getStripByteCountsDescription();
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120 | case ExifSubIFDDirectory.TAG_SAMPLES_PER_PIXEL:
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121 | return getSamplesPerPixelDescription();
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122 | case ExifSubIFDDirectory.TAG_PLANAR_CONFIGURATION:
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123 | return getPlanarConfigurationDescription();
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124 | case ExifSubIFDDirectory.TAG_YCBCR_SUBSAMPLING:
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125 | return getYCbCrSubsamplingDescription();
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126 | case ExifSubIFDDirectory.TAG_EXPOSURE_PROGRAM:
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127 | return getExposureProgramDescription();
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128 | case ExifSubIFDDirectory.TAG_APERTURE:
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129 | return getApertureValueDescription();
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130 | case ExifSubIFDDirectory.TAG_MAX_APERTURE:
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131 | return getMaxApertureValueDescription();
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132 | case ExifSubIFDDirectory.TAG_SENSING_METHOD:
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133 | return getSensingMethodDescription();
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134 | case ExifSubIFDDirectory.TAG_EXPOSURE_BIAS:
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135 | return getExposureBiasDescription();
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136 | case ExifSubIFDDirectory.TAG_FILE_SOURCE:
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137 | return getFileSourceDescription();
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138 | case ExifSubIFDDirectory.TAG_SCENE_TYPE:
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139 | return getSceneTypeDescription();
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140 | case ExifSubIFDDirectory.TAG_COMPONENTS_CONFIGURATION:
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141 | return getComponentConfigurationDescription();
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142 | case ExifSubIFDDirectory.TAG_EXIF_VERSION:
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143 | return getExifVersionDescription();
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144 | case ExifSubIFDDirectory.TAG_FLASHPIX_VERSION:
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145 | return getFlashPixVersionDescription();
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146 | case ExifSubIFDDirectory.TAG_ISO_EQUIVALENT:
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147 | return getIsoEquivalentDescription();
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148 | case ExifSubIFDDirectory.TAG_USER_COMMENT:
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149 | return getUserCommentDescription();
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150 | case ExifSubIFDDirectory.TAG_CUSTOM_RENDERED:
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151 | return getCustomRenderedDescription();
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152 | case ExifSubIFDDirectory.TAG_EXPOSURE_MODE:
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153 | return getExposureModeDescription();
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154 | case ExifSubIFDDirectory.TAG_WHITE_BALANCE_MODE:
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155 | return getWhiteBalanceModeDescription();
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156 | case ExifSubIFDDirectory.TAG_DIGITAL_ZOOM_RATIO:
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157 | return getDigitalZoomRatioDescription();
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158 | case ExifSubIFDDirectory.TAG_35MM_FILM_EQUIV_FOCAL_LENGTH:
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159 | return get35mmFilmEquivFocalLengthDescription();
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160 | case ExifSubIFDDirectory.TAG_SCENE_CAPTURE_TYPE:
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161 | return getSceneCaptureTypeDescription();
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162 | case ExifSubIFDDirectory.TAG_GAIN_CONTROL:
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163 | return getGainControlDescription();
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164 | case ExifSubIFDDirectory.TAG_CONTRAST:
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165 | return getContrastDescription();
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166 | case ExifSubIFDDirectory.TAG_SATURATION:
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167 | return getSaturationDescription();
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168 | case ExifSubIFDDirectory.TAG_SHARPNESS:
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169 | return getSharpnessDescription();
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170 | case ExifSubIFDDirectory.TAG_SUBJECT_DISTANCE_RANGE:
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171 | return getSubjectDistanceRangeDescription();
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172 | default:
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173 | return super.getDescription(tagType);
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174 | }
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175 | }
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176 |
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177 | @Nullable
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178 | public String getNewSubfileTypeDescription()
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179 | {
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180 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_NEW_SUBFILE_TYPE);
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181 | if (value==null)
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182 | return null;
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183 | switch (value) {
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184 | case 1: return "Full-resolution image";
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185 | case 2: return "Reduced-resolution image";
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186 | case 3: return "Single page of multi-page reduced-resolution image";
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187 | case 4: return "Transparency mask";
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188 | case 5: return "Transparency mask of reduced-resolution image";
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189 | case 6: return "Transparency mask of multi-page image";
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190 | case 7: return "Transparency mask of reduced-resolution multi-page image";
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191 | default:
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192 | return "Unknown (" + value + ")";
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193 | }
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194 | }
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195 |
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196 | @Nullable
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197 | public String getSubfileTypeDescription()
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198 | {
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199 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SUBFILE_TYPE);
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200 | if (value==null)
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201 | return null;
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202 | switch (value) {
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203 | case 1: return "Full-resolution image";
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204 | case 2: return "Reduced-resolution image";
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205 | case 3: return "Single page of multi-page image";
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206 | default:
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207 | return "Unknown (" + value + ")";
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208 | }
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209 | }
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210 |
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211 | @Nullable
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212 | public String getThresholdingDescription()
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213 | {
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214 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_THRESHOLDING);
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215 | if (value==null)
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216 | return null;
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217 | switch (value) {
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218 | case 1: return "No dithering or halftoning";
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219 | case 2: return "Ordered dither or halftone";
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220 | case 3: return "Randomized dither";
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221 | default:
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222 | return "Unknown (" + value + ")";
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223 | }
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224 | }
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225 |
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226 | @Nullable
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227 | public String getFillOrderDescription()
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228 | {
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229 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_FILL_ORDER);
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230 | if (value==null)
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231 | return null;
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232 | switch (value) {
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233 | case 1: return "Normal";
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234 | case 2: return "Reversed";
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235 | default:
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236 | return "Unknown (" + value + ")";
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237 | }
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238 | }
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239 |
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240 | @Nullable
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241 | public String getSubjectDistanceRangeDescription()
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242 | {
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243 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SUBJECT_DISTANCE_RANGE);
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244 | if (value==null)
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245 | return null;
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246 | switch (value) {
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247 | case 0: return "Unknown";
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248 | case 1: return "Macro";
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249 | case 2: return "Close view";
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250 | case 3: return "Distant view";
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251 | default:
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252 | return "Unknown (" + value + ")";
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253 | }
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254 | }
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255 |
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256 | @Nullable
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257 | public String getSharpnessDescription()
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258 | {
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259 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SHARPNESS);
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260 | if (value==null)
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261 | return null;
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262 | switch (value) {
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263 | case 0: return "None";
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264 | case 1: return "Low";
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265 | case 2: return "Hard";
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266 | default:
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267 | return "Unknown (" + value + ")";
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268 | }
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269 | }
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270 |
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271 | @Nullable
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272 | public String getSaturationDescription()
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273 | {
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274 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SATURATION);
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275 | if (value==null)
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276 | return null;
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277 | switch (value) {
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278 | case 0: return "None";
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279 | case 1: return "Low saturation";
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280 | case 2: return "High saturation";
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281 | default:
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282 | return "Unknown (" + value + ")";
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283 | }
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284 | }
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285 |
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286 | @Nullable
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287 | public String getContrastDescription()
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288 | {
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289 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_CONTRAST);
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290 | if (value==null)
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291 | return null;
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292 | switch (value) {
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293 | case 0: return "None";
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294 | case 1: return "Soft";
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295 | case 2: return "Hard";
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296 | default:
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297 | return "Unknown (" + value + ")";
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298 | }
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299 | }
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300 |
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301 | @Nullable
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302 | public String getGainControlDescription()
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303 | {
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304 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_GAIN_CONTROL);
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305 | if (value==null)
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306 | return null;
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307 | switch (value) {
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308 | case 0: return "None";
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309 | case 1: return "Low gain up";
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310 | case 2: return "Low gain down";
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311 | case 3: return "High gain up";
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312 | case 4: return "High gain down";
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313 | default:
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314 | return "Unknown (" + value + ")";
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315 | }
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316 | }
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317 |
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318 | @Nullable
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319 | public String getSceneCaptureTypeDescription()
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320 | {
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321 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SCENE_CAPTURE_TYPE);
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322 | if (value==null)
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323 | return null;
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324 | switch (value) {
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325 | case 0: return "Standard";
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326 | case 1: return "Landscape";
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327 | case 2: return "Portrait";
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328 | case 3: return "Night scene";
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329 | default:
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330 | return "Unknown (" + value + ")";
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331 | }
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332 | }
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333 |
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334 | @Nullable
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335 | public String get35mmFilmEquivFocalLengthDescription()
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336 | {
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337 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_35MM_FILM_EQUIV_FOCAL_LENGTH);
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338 | if (value==null)
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339 | return null;
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340 | if (value==0)
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341 | return "Unknown";
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342 | else
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343 | return SimpleDecimalFormatter.format(value) + "mm";
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344 | }
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345 |
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346 | @Nullable
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347 | public String getDigitalZoomRatioDescription()
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348 | {
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349 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_DIGITAL_ZOOM_RATIO);
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350 | if (value==null)
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351 | return null;
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352 | if (value.getNumerator()==0)
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353 | return "Digital zoom not used.";
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354 | return SimpleDecimalFormatter.format(value.doubleValue());
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355 | }
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356 |
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357 | @Nullable
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358 | public String getWhiteBalanceModeDescription()
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359 | {
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360 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_WHITE_BALANCE_MODE);
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361 | if (value==null)
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362 | return null;
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363 | switch (value) {
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364 | case 0: return "Auto white balance";
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365 | case 1: return "Manual white balance";
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366 | default:
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367 | return "Unknown (" + value + ")";
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368 | }
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369 | }
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370 |
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371 | @Nullable
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372 | public String getExposureModeDescription()
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373 | {
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374 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_EXPOSURE_MODE);
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375 | if (value==null)
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376 | return null;
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377 | switch (value) {
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378 | case 0: return "Auto exposure";
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379 | case 1: return "Manual exposure";
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380 | case 2: return "Auto bracket";
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381 | default:
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382 | return "Unknown (" + value + ")";
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383 | }
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384 | }
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385 |
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386 | @Nullable
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387 | public String getCustomRenderedDescription()
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388 | {
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389 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_CUSTOM_RENDERED);
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390 | if (value==null)
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391 | return null;
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392 | switch (value) {
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393 | case 0: return "Normal process";
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394 | case 1: return "Custom process";
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395 | default:
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396 | return "Unknown (" + value + ")";
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397 | }
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398 | }
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399 |
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400 | @Nullable
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401 | public String getUserCommentDescription()
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402 | {
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403 | byte[] commentBytes = _directory.getByteArray(ExifSubIFDDirectory.TAG_USER_COMMENT);
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404 | if (commentBytes==null)
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405 | return null;
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406 | if (commentBytes.length == 0)
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407 | return "";
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408 |
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409 | final Map<String, String> encodingMap = new HashMap<String, String>();
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410 | encodingMap.put("ASCII", System.getProperty("file.encoding")); // Someone suggested "ISO-8859-1".
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411 | encodingMap.put("UNICODE", "UTF-16LE");
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412 | encodingMap.put("JIS", "Shift-JIS"); // We assume this charset for now. Another suggestion is "JIS".
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413 |
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414 | try {
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415 | if (commentBytes.length >= 10) {
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416 | String firstTenBytesString = new String(commentBytes, 0, 10);
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417 |
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418 | // try each encoding name
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419 | for (Map.Entry<String, String> pair : encodingMap.entrySet()) {
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420 | String encodingName = pair.getKey();
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421 | String charset = pair.getValue();
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422 | if (firstTenBytesString.startsWith(encodingName)) {
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423 | // skip any null or blank characters commonly present after the encoding name, up to a limit of 10 from the start
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424 | for (int j = encodingName.length(); j < 10; j++) {
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425 | byte b = commentBytes[j];
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426 | if (b != '\0' && b != ' ')
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427 | return new String(commentBytes, j, commentBytes.length - j, charset).trim();
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428 | }
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429 | return new String(commentBytes, 10, commentBytes.length - 10, charset).trim();
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430 | }
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431 | }
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432 | }
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433 | // special handling fell through, return a plain string representation
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434 | return new String(commentBytes, System.getProperty("file.encoding")).trim();
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435 | } catch (UnsupportedEncodingException ex) {
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436 | return null;
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437 | }
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438 | }
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439 |
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440 | @Nullable
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441 | public String getIsoEquivalentDescription()
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442 | {
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443 | // Have seen an exception here from files produced by ACDSEE that stored an int[] here with two values
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444 | Integer isoEquiv = _directory.getInteger(ExifSubIFDDirectory.TAG_ISO_EQUIVALENT);
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445 | if (isoEquiv==null)
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446 | return null;
|
---|
447 | // There used to be a check here that multiplied ISO values < 50 by 200.
|
---|
448 | // Issue 36 shows a smart-phone image from a Samsung Galaxy S2 with ISO-40.
|
---|
449 | return Integer.toString(isoEquiv);
|
---|
450 | }
|
---|
451 |
|
---|
452 | @Nullable
|
---|
453 | public String getExifVersionDescription()
|
---|
454 | {
|
---|
455 | int[] ints = _directory.getIntArray(ExifSubIFDDirectory.TAG_EXIF_VERSION);
|
---|
456 | if (ints==null)
|
---|
457 | return null;
|
---|
458 | return ExifSubIFDDescriptor.convertBytesToVersionString(ints, 2);
|
---|
459 | }
|
---|
460 |
|
---|
461 | @Nullable
|
---|
462 | public String getFlashPixVersionDescription()
|
---|
463 | {
|
---|
464 | int[] ints = _directory.getIntArray(ExifSubIFDDirectory.TAG_FLASHPIX_VERSION);
|
---|
465 | if (ints==null)
|
---|
466 | return null;
|
---|
467 | return ExifSubIFDDescriptor.convertBytesToVersionString(ints, 2);
|
---|
468 | }
|
---|
469 |
|
---|
470 | @Nullable
|
---|
471 | public String getSceneTypeDescription()
|
---|
472 | {
|
---|
473 | Integer sceneType = _directory.getInteger(ExifSubIFDDirectory.TAG_SCENE_TYPE);
|
---|
474 | if (sceneType==null)
|
---|
475 | return null;
|
---|
476 | return sceneType == 1
|
---|
477 | ? "Directly photographed image"
|
---|
478 | : "Unknown (" + sceneType + ")";
|
---|
479 | }
|
---|
480 |
|
---|
481 | @Nullable
|
---|
482 | public String getFileSourceDescription()
|
---|
483 | {
|
---|
484 | Integer fileSource = _directory.getInteger(ExifSubIFDDirectory.TAG_FILE_SOURCE);
|
---|
485 | if (fileSource==null)
|
---|
486 | return null;
|
---|
487 | return fileSource == 3
|
---|
488 | ? "Digital Still Camera (DSC)"
|
---|
489 | : "Unknown (" + fileSource + ")";
|
---|
490 | }
|
---|
491 |
|
---|
492 | @Nullable
|
---|
493 | public String getExposureBiasDescription()
|
---|
494 | {
|
---|
495 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_EXPOSURE_BIAS);
|
---|
496 | if (value==null)
|
---|
497 | return null;
|
---|
498 | return value.toSimpleString(true) + " EV";
|
---|
499 | }
|
---|
500 |
|
---|
501 | @Nullable
|
---|
502 | public String getMaxApertureValueDescription()
|
---|
503 | {
|
---|
504 | Double aperture = _directory.getDoubleObject(ExifSubIFDDirectory.TAG_MAX_APERTURE);
|
---|
505 | if (aperture==null)
|
---|
506 | return null;
|
---|
507 | double fStop = PhotographicConversions.apertureToFStop(aperture);
|
---|
508 | return "F" + SimpleDecimalFormatter.format(fStop);
|
---|
509 | }
|
---|
510 |
|
---|
511 | @Nullable
|
---|
512 | public String getApertureValueDescription()
|
---|
513 | {
|
---|
514 | Double aperture = _directory.getDoubleObject(ExifSubIFDDirectory.TAG_APERTURE);
|
---|
515 | if (aperture==null)
|
---|
516 | return null;
|
---|
517 | double fStop = PhotographicConversions.apertureToFStop(aperture);
|
---|
518 | return "F" + SimpleDecimalFormatter.format(fStop);
|
---|
519 | }
|
---|
520 |
|
---|
521 | @Nullable
|
---|
522 | public String getExposureProgramDescription()
|
---|
523 | {
|
---|
524 | // '1' means manual control, '2' program normal, '3' aperture priority,
|
---|
525 | // '4' shutter priority, '5' program creative (slow program),
|
---|
526 | // '6' program action(high-speed program), '7' portrait mode, '8' landscape mode.
|
---|
527 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_EXPOSURE_PROGRAM);
|
---|
528 | if (value==null)
|
---|
529 | return null;
|
---|
530 | switch (value) {
|
---|
531 | case 1: return "Manual control";
|
---|
532 | case 2: return "Program normal";
|
---|
533 | case 3: return "Aperture priority";
|
---|
534 | case 4: return "Shutter priority";
|
---|
535 | case 5: return "Program creative (slow program)";
|
---|
536 | case 6: return "Program action (high-speed program)";
|
---|
537 | case 7: return "Portrait mode";
|
---|
538 | case 8: return "Landscape mode";
|
---|
539 | default:
|
---|
540 | return "Unknown program (" + value + ")";
|
---|
541 | }
|
---|
542 | }
|
---|
543 |
|
---|
544 | @Nullable
|
---|
545 | public String getYCbCrSubsamplingDescription()
|
---|
546 | {
|
---|
547 | int[] positions = _directory.getIntArray(ExifSubIFDDirectory.TAG_YCBCR_SUBSAMPLING);
|
---|
548 | if (positions==null)
|
---|
549 | return null;
|
---|
550 | if (positions[0] == 2 && positions[1] == 1) {
|
---|
551 | return "YCbCr4:2:2";
|
---|
552 | } else if (positions[0] == 2 && positions[1] == 2) {
|
---|
553 | return "YCbCr4:2:0";
|
---|
554 | } else {
|
---|
555 | return "(Unknown)";
|
---|
556 | }
|
---|
557 | }
|
---|
558 |
|
---|
559 | @Nullable
|
---|
560 | public String getPlanarConfigurationDescription()
|
---|
561 | {
|
---|
562 | // When image format is no compression YCbCr, this value shows byte aligns of YCbCr
|
---|
563 | // data. If value is '1', Y/Cb/Cr value is chunky format, contiguous for each subsampling
|
---|
564 | // pixel. If value is '2', Y/Cb/Cr value is separated and stored to Y plane/Cb plane/Cr
|
---|
565 | // plane format.
|
---|
566 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_PLANAR_CONFIGURATION);
|
---|
567 | if (value==null)
|
---|
568 | return null;
|
---|
569 | switch (value) {
|
---|
570 | case 1: return "Chunky (contiguous for each subsampling pixel)";
|
---|
571 | case 2: return "Separate (Y-plane/Cb-plane/Cr-plane format)";
|
---|
572 | default:
|
---|
573 | return "Unknown configuration";
|
---|
574 | }
|
---|
575 | }
|
---|
576 |
|
---|
577 | @Nullable
|
---|
578 | public String getSamplesPerPixelDescription()
|
---|
579 | {
|
---|
580 | String value = _directory.getString(ExifSubIFDDirectory.TAG_SAMPLES_PER_PIXEL);
|
---|
581 | return value==null ? null : value + " samples/pixel";
|
---|
582 | }
|
---|
583 |
|
---|
584 | @Nullable
|
---|
585 | public String getRowsPerStripDescription()
|
---|
586 | {
|
---|
587 | final String value = _directory.getString(ExifSubIFDDirectory.TAG_ROWS_PER_STRIP);
|
---|
588 | return value==null ? null : value + " rows/strip";
|
---|
589 | }
|
---|
590 |
|
---|
591 | @Nullable
|
---|
592 | public String getStripByteCountsDescription()
|
---|
593 | {
|
---|
594 | final String value = _directory.getString(ExifSubIFDDirectory.TAG_STRIP_BYTE_COUNTS);
|
---|
595 | return value==null ? null : value + " bytes";
|
---|
596 | }
|
---|
597 |
|
---|
598 | @Nullable
|
---|
599 | public String getPhotometricInterpretationDescription()
|
---|
600 | {
|
---|
601 | // Shows the color space of the image data components
|
---|
602 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_PHOTOMETRIC_INTERPRETATION);
|
---|
603 | if (value==null)
|
---|
604 | return null;
|
---|
605 | switch (value) {
|
---|
606 | case 0: return "WhiteIsZero";
|
---|
607 | case 1: return "BlackIsZero";
|
---|
608 | case 2: return "RGB";
|
---|
609 | case 3: return "RGB Palette";
|
---|
610 | case 4: return "Transparency Mask";
|
---|
611 | case 5: return "CMYK";
|
---|
612 | case 6: return "YCbCr";
|
---|
613 | case 8: return "CIELab";
|
---|
614 | case 9: return "ICCLab";
|
---|
615 | case 10: return "ITULab";
|
---|
616 | case 32803: return "Color Filter Array";
|
---|
617 | case 32844: return "Pixar LogL";
|
---|
618 | case 32845: return "Pixar LogLuv";
|
---|
619 | case 32892: return "Linear Raw";
|
---|
620 | default:
|
---|
621 | return "Unknown colour space";
|
---|
622 | }
|
---|
623 | }
|
---|
624 |
|
---|
625 | @Nullable
|
---|
626 | public String getBitsPerSampleDescription()
|
---|
627 | {
|
---|
628 | String value = _directory.getString(ExifSubIFDDirectory.TAG_BITS_PER_SAMPLE);
|
---|
629 | return value==null ? null : value + " bits/component/pixel";
|
---|
630 | }
|
---|
631 |
|
---|
632 | @Nullable
|
---|
633 | public String getFocalPlaneXResolutionDescription()
|
---|
634 | {
|
---|
635 | Rational rational = _directory.getRational(ExifSubIFDDirectory.TAG_FOCAL_PLANE_X_RES);
|
---|
636 | if (rational==null)
|
---|
637 | return null;
|
---|
638 | final String unit = getFocalPlaneResolutionUnitDescription();
|
---|
639 | return rational.getReciprocal().toSimpleString(_allowDecimalRepresentationOfRationals)
|
---|
640 | + (unit==null ? "" : " " + unit.toLowerCase());
|
---|
641 | }
|
---|
642 |
|
---|
643 | @Nullable
|
---|
644 | public String getFocalPlaneYResolutionDescription()
|
---|
645 | {
|
---|
646 | Rational rational = _directory.getRational(ExifSubIFDDirectory.TAG_FOCAL_PLANE_Y_RES);
|
---|
647 | if (rational==null)
|
---|
648 | return null;
|
---|
649 | final String unit = getFocalPlaneResolutionUnitDescription();
|
---|
650 | return rational.getReciprocal().toSimpleString(_allowDecimalRepresentationOfRationals)
|
---|
651 | + (unit==null ? "" : " " + unit.toLowerCase());
|
---|
652 | }
|
---|
653 |
|
---|
654 | @Nullable
|
---|
655 | public String getFocalPlaneResolutionUnitDescription()
|
---|
656 | {
|
---|
657 | // Unit of FocalPlaneXResolution/FocalPlaneYResolution. '1' means no-unit,
|
---|
658 | // '2' inch, '3' centimeter.
|
---|
659 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_FOCAL_PLANE_UNIT);
|
---|
660 | if (value==null)
|
---|
661 | return null;
|
---|
662 | switch (value) {
|
---|
663 | case 1: return "(No unit)";
|
---|
664 | case 2: return "Inches";
|
---|
665 | case 3: return "cm";
|
---|
666 | default:
|
---|
667 | return "";
|
---|
668 | }
|
---|
669 | }
|
---|
670 |
|
---|
671 | @Nullable
|
---|
672 | public String getExifImageWidthDescription()
|
---|
673 | {
|
---|
674 | final Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_EXIF_IMAGE_WIDTH);
|
---|
675 | if (value==null)
|
---|
676 | return null;
|
---|
677 | return value + " pixels";
|
---|
678 | }
|
---|
679 |
|
---|
680 | @Nullable
|
---|
681 | public String getExifImageHeightDescription()
|
---|
682 | {
|
---|
683 | final Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_EXIF_IMAGE_HEIGHT);
|
---|
684 | if (value==null)
|
---|
685 | return null;
|
---|
686 | return value + " pixels";
|
---|
687 | }
|
---|
688 |
|
---|
689 | @Nullable
|
---|
690 | public String getColorSpaceDescription()
|
---|
691 | {
|
---|
692 | final Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_COLOR_SPACE);
|
---|
693 | if (value==null)
|
---|
694 | return null;
|
---|
695 | if (value == 1)
|
---|
696 | return "sRGB";
|
---|
697 | if (value == 65535)
|
---|
698 | return "Undefined";
|
---|
699 | return "Unknown";
|
---|
700 | }
|
---|
701 |
|
---|
702 | @Nullable
|
---|
703 | public String getFocalLengthDescription()
|
---|
704 | {
|
---|
705 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_FOCAL_LENGTH);
|
---|
706 | if (value==null)
|
---|
707 | return null;
|
---|
708 | java.text.DecimalFormat formatter = new DecimalFormat("0.0##");
|
---|
709 | return formatter.format(value.doubleValue()) + " mm";
|
---|
710 | }
|
---|
711 |
|
---|
712 | @Nullable
|
---|
713 | public String getFlashDescription()
|
---|
714 | {
|
---|
715 | /*
|
---|
716 | * This is a bitmask.
|
---|
717 | * 0 = flash fired
|
---|
718 | * 1 = return detected
|
---|
719 | * 2 = return able to be detected
|
---|
720 | * 3 = unknown
|
---|
721 | * 4 = auto used
|
---|
722 | * 5 = unknown
|
---|
723 | * 6 = red eye reduction used
|
---|
724 | */
|
---|
725 |
|
---|
726 | final Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_FLASH);
|
---|
727 |
|
---|
728 | if (value==null)
|
---|
729 | return null;
|
---|
730 |
|
---|
731 | StringBuilder sb = new StringBuilder();
|
---|
732 |
|
---|
733 | if ((value & 0x1)!=0)
|
---|
734 | sb.append("Flash fired");
|
---|
735 | else
|
---|
736 | sb.append("Flash did not fire");
|
---|
737 |
|
---|
738 | // check if we're able to detect a return, before we mention it
|
---|
739 | if ((value & 0x4)!=0)
|
---|
740 | {
|
---|
741 | if ((value & 0x2)!=0)
|
---|
742 | sb.append(", return detected");
|
---|
743 | else
|
---|
744 | sb.append(", return not detected");
|
---|
745 | }
|
---|
746 |
|
---|
747 | if ((value & 0x10)!=0)
|
---|
748 | sb.append(", auto");
|
---|
749 |
|
---|
750 | if ((value & 0x40)!=0)
|
---|
751 | sb.append(", red-eye reduction");
|
---|
752 |
|
---|
753 | return sb.toString();
|
---|
754 | }
|
---|
755 |
|
---|
756 | @Nullable
|
---|
757 | public String getWhiteBalanceDescription()
|
---|
758 | {
|
---|
759 | // '0' means unknown, '1' daylight, '2' fluorescent, '3' tungsten, '10' flash,
|
---|
760 | // '17' standard light A, '18' standard light B, '19' standard light C, '20' D55,
|
---|
761 | // '21' D65, '22' D75, '255' other.
|
---|
762 | final Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_WHITE_BALANCE);
|
---|
763 | if (value==null)
|
---|
764 | return null;
|
---|
765 | switch (value) {
|
---|
766 | case 0: return "Unknown";
|
---|
767 | case 1: return "Daylight";
|
---|
768 | case 2: return "Florescent";
|
---|
769 | case 3: return "Tungsten";
|
---|
770 | case 10: return "Flash";
|
---|
771 | case 17: return "Standard light";
|
---|
772 | case 18: return "Standard light (B)";
|
---|
773 | case 19: return "Standard light (C)";
|
---|
774 | case 20: return "D55";
|
---|
775 | case 21: return "D65";
|
---|
776 | case 22: return "D75";
|
---|
777 | case 255: return "(Other)";
|
---|
778 | default:
|
---|
779 | return "Unknown (" + value + ")";
|
---|
780 | }
|
---|
781 | }
|
---|
782 |
|
---|
783 | @Nullable
|
---|
784 | public String getMeteringModeDescription()
|
---|
785 | {
|
---|
786 | // '0' means unknown, '1' average, '2' center weighted average, '3' spot
|
---|
787 | // '4' multi-spot, '5' multi-segment, '6' partial, '255' other
|
---|
788 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_METERING_MODE);
|
---|
789 | if (value==null)
|
---|
790 | return null;
|
---|
791 | switch (value) {
|
---|
792 | case 0: return "Unknown";
|
---|
793 | case 1: return "Average";
|
---|
794 | case 2: return "Center weighted average";
|
---|
795 | case 3: return "Spot";
|
---|
796 | case 4: return "Multi-spot";
|
---|
797 | case 5: return "Multi-segment";
|
---|
798 | case 6: return "Partial";
|
---|
799 | case 255: return "(Other)";
|
---|
800 | default:
|
---|
801 | return "";
|
---|
802 | }
|
---|
803 | }
|
---|
804 |
|
---|
805 | @Nullable
|
---|
806 | public String getSubjectDistanceDescription()
|
---|
807 | {
|
---|
808 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_SUBJECT_DISTANCE);
|
---|
809 | if (value==null)
|
---|
810 | return null;
|
---|
811 | java.text.DecimalFormat formatter = new DecimalFormat("0.0##");
|
---|
812 | return formatter.format(value.doubleValue()) + " metres";
|
---|
813 | }
|
---|
814 |
|
---|
815 | @Nullable
|
---|
816 | public String getCompressedAverageBitsPerPixelDescription()
|
---|
817 | {
|
---|
818 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_COMPRESSED_AVERAGE_BITS_PER_PIXEL);
|
---|
819 | if (value==null)
|
---|
820 | return null;
|
---|
821 | String ratio = value.toSimpleString(_allowDecimalRepresentationOfRationals);
|
---|
822 | if (value.isInteger() && value.intValue() == 1) {
|
---|
823 | return ratio + " bit/pixel";
|
---|
824 | } else {
|
---|
825 | return ratio + " bits/pixel";
|
---|
826 | }
|
---|
827 | }
|
---|
828 |
|
---|
829 | @Nullable
|
---|
830 | public String getExposureTimeDescription()
|
---|
831 | {
|
---|
832 | String value = _directory.getString(ExifSubIFDDirectory.TAG_EXPOSURE_TIME);
|
---|
833 | return value==null ? null : value + " sec";
|
---|
834 | }
|
---|
835 |
|
---|
836 | @Nullable
|
---|
837 | public String getShutterSpeedDescription()
|
---|
838 | {
|
---|
839 | // I believe this method to now be stable, but am leaving some alternative snippets of
|
---|
840 | // code in here, to assist anyone who's looking into this (given that I don't have a public CVS).
|
---|
841 |
|
---|
842 | // float apexValue = _directory.getFloat(ExifSubIFDDirectory.TAG_SHUTTER_SPEED);
|
---|
843 | // int apexPower = (int)Math.pow(2.0, apexValue);
|
---|
844 | // return "1/" + apexPower + " sec";
|
---|
845 | // TODO test this method
|
---|
846 | // thanks to Mark Edwards for spotting and patching a bug in the calculation of this
|
---|
847 | // description (spotted bug using a Canon EOS 300D)
|
---|
848 | // thanks also to Gli Blr for spotting this bug
|
---|
849 | Float apexValue = _directory.getFloatObject(ExifSubIFDDirectory.TAG_SHUTTER_SPEED);
|
---|
850 | if (apexValue==null)
|
---|
851 | return null;
|
---|
852 | if (apexValue<=1) {
|
---|
853 | float apexPower = (float)(1/(Math.exp(apexValue*Math.log(2))));
|
---|
854 | long apexPower10 = Math.round((double)apexPower * 10.0);
|
---|
855 | float fApexPower = (float) apexPower10 / 10.0f;
|
---|
856 | return fApexPower + " sec";
|
---|
857 | } else {
|
---|
858 | int apexPower = (int)((Math.exp(apexValue*Math.log(2))));
|
---|
859 | return "1/" + apexPower + " sec";
|
---|
860 | }
|
---|
861 |
|
---|
862 | /*
|
---|
863 | // This alternative implementation offered by Bill Richards
|
---|
864 | // TODO determine which is the correct / more-correct implementation
|
---|
865 | double apexValue = _directory.getDouble(ExifSubIFDDirectory.TAG_SHUTTER_SPEED);
|
---|
866 | double apexPower = Math.pow(2.0, apexValue);
|
---|
867 |
|
---|
868 | StringBuffer sb = new StringBuffer();
|
---|
869 | if (apexPower > 1)
|
---|
870 | apexPower = Math.floor(apexPower);
|
---|
871 |
|
---|
872 | if (apexPower < 1) {
|
---|
873 | sb.append((int)Math.round(1/apexPower));
|
---|
874 | } else {
|
---|
875 | sb.append("1/");
|
---|
876 | sb.append((int)apexPower);
|
---|
877 | }
|
---|
878 | sb.append(" sec");
|
---|
879 | return sb.toString();
|
---|
880 | */
|
---|
881 |
|
---|
882 | }
|
---|
883 |
|
---|
884 | @Nullable
|
---|
885 | public String getFNumberDescription()
|
---|
886 | {
|
---|
887 | Rational value = _directory.getRational(ExifSubIFDDirectory.TAG_FNUMBER);
|
---|
888 | if (value==null)
|
---|
889 | return null;
|
---|
890 | return "F" + SimpleDecimalFormatter.format(value.doubleValue());
|
---|
891 | }
|
---|
892 |
|
---|
893 | @Nullable
|
---|
894 | public String getSensingMethodDescription()
|
---|
895 | {
|
---|
896 | // '1' Not defined, '2' One-chip color area sensor, '3' Two-chip color area sensor
|
---|
897 | // '4' Three-chip color area sensor, '5' Color sequential area sensor
|
---|
898 | // '7' Trilinear sensor '8' Color sequential linear sensor, 'Other' reserved
|
---|
899 | Integer value = _directory.getInteger(ExifSubIFDDirectory.TAG_SENSING_METHOD);
|
---|
900 | if (value==null)
|
---|
901 | return null;
|
---|
902 | switch (value) {
|
---|
903 | case 1: return "(Not defined)";
|
---|
904 | case 2: return "One-chip color area sensor";
|
---|
905 | case 3: return "Two-chip color area sensor";
|
---|
906 | case 4: return "Three-chip color area sensor";
|
---|
907 | case 5: return "Color sequential area sensor";
|
---|
908 | case 7: return "Trilinear sensor";
|
---|
909 | case 8: return "Color sequential linear sensor";
|
---|
910 | default:
|
---|
911 | return "";
|
---|
912 | }
|
---|
913 | }
|
---|
914 |
|
---|
915 | @Nullable
|
---|
916 | public String getComponentConfigurationDescription()
|
---|
917 | {
|
---|
918 | int[] components = _directory.getIntArray(ExifSubIFDDirectory.TAG_COMPONENTS_CONFIGURATION);
|
---|
919 | if (components==null)
|
---|
920 | return null;
|
---|
921 | String[] componentStrings = {"", "Y", "Cb", "Cr", "R", "G", "B"};
|
---|
922 | StringBuilder componentConfig = new StringBuilder();
|
---|
923 | for (int i = 0; i < Math.min(4, components.length); i++) {
|
---|
924 | int j = components[i];
|
---|
925 | if (j > 0 && j < componentStrings.length) {
|
---|
926 | componentConfig.append(componentStrings[j]);
|
---|
927 | }
|
---|
928 | }
|
---|
929 | return componentConfig.toString();
|
---|
930 | }
|
---|
931 | }
|
---|