/* exif-tag.c * * Copyright © 2001 Lutz Müller * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include #include #include #include typedef enum { ESL_MANDATORY = 1, /* Mandatory */ ESL_CMANDATORY = 2, /* Conditionally mandatory */ ESL_OPTIONAL = 3, /* Optional */ ESL_NOT_RECORDED = 4 /* Not recorded */ } ExifSL; /* Exif Support Level */ static struct { ExifTag tag; const char *name; const char *title; const char *description; ExifSL esl_0[4], esl_1[4], esl_exif[4], esl_gps[4]; } ExifTagTable[] = { {EXIF_TAG_NEW_SUBFILE_TYPE, "NewSubfileType", "New Subfile Type", N_("A general indication of the kind of data " "contained in this subfile.")}, {EXIF_TAG_INTEROPERABILITY_INDEX, "InteroperabilityIndex", "InteroperabilityIndex", N_("Indicates the identification of the Interoperability rule. " "Use \"R98\" for stating ExifR98 Rules. Four bytes used " "including the termination code (NULL). see the separate " "volume of Recommended Exif Interoperability Rules (ExifR98) " "for other tags used for ExifR98.")}, {EXIF_TAG_INTEROPERABILITY_VERSION, "InteroperabilityVersion", "InteroperabilityVersion", ""}, {EXIF_TAG_IMAGE_WIDTH, "ImageWidth", N_("Image Width"), N_("The number of columns of image data, equal to the number of " "pixels per row. In JPEG compressed data a JPEG marker is " "used instead of this tag."), {ESL_MANDATORY, ESL_MANDATORY, ESL_MANDATORY, ESL_NOT_RECORDED}}, {EXIF_TAG_IMAGE_LENGTH, "ImageLength", N_("Image Length"), N_("The number of rows of image data. In JPEG compressed data a " "JPEG marker is used instead of this tag."), {ESL_MANDATORY, ESL_MANDATORY, ESL_MANDATORY, ESL_NOT_RECORDED}}, {EXIF_TAG_BITS_PER_SAMPLE, "BitsPerSample", N_("Bits per Sample"), N_("The number of bits per image component. In this standard each " "component of the image is 8 bits, so the value for this " "tag is 9. See also . In JPEG compressed data " "a JPEG marker is used instead of this tag."), {ESL_MANDATORY, ESL_MANDATORY, ESL_MANDATORY, ESL_NOT_RECORDED}}, {EXIF_TAG_COMPRESSION, "Compression", N_("Compression"), N_("The compression scheme used for the image data. When a " "primary image is JPEG compressed, this designation is " "not necessary and is omitted. When thumbnails use JPEG " "compression, this tag value is set to 6."), {ESL_MANDATORY, ESL_MANDATORY, ESL_MANDATORY, ESL_NOT_RECORDED}}, {EXIF_TAG_PHOTOMETRIC_INTERPRETATION, "PhotometricInterpretation", N_("Photometric Interpretation"), N_("The pixel composition. In JPEG compressed data a JPEG " "marker is used instead of this tag."), {ESL_MANDATORY, ESL_MANDATORY, ESL_MANDATORY, ESL_NOT_RECORDED}}, {EXIF_TAG_FILL_ORDER, "FillOrder", N_("Fill Order"), ""}, {EXIF_TAG_DOCUMENT_NAME, "DocumentName", N_("Document Name"), ""}, {EXIF_TAG_IMAGE_DESCRIPTION, "ImageDescription", N_("Image Description"), N_("A character string giving the title of the image. It may be " "a comment such as \"1988 company picnic\" or " "the like. Two-bytes character codes cannot be used. " "When a 2-bytes code is necessary, the Exif Private tag " " is to be used."), {ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY}}, {EXIF_TAG_MAKE, "Make", N_("Manufacturer"), N_("The manufacturer of the recording " "equipment. This is the manufacturer of the DSC, scanner, " "video digitizer or other equipment that generated the " "image. When the field is left blank, it is treated as " "unknown."), {ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY}}, {EXIF_TAG_MODEL, "Model", N_("Model"), N_("The model name or model number of the equipment. This is the " "model name or number of the DSC, scanner, video digitizer " "or other equipment that generated the image. When the field " "is left blank, it is treated as unknown."), {ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY}}, {EXIF_TAG_STRIP_OFFSETS, "StripOffsets", N_("Strip Offsets"), N_("For each strip, the byte offset of that strip. It is " "recommended that this be selected so the number of strip " "bytes does not exceed 64 Kbytes. With JPEG compressed " "data this designation is not needed and is omitted. See also " " and ."), {ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY}}, {EXIF_TAG_ORIENTATION, "Orientation", N_("Orientation"), N_("The image orientation viewed in terms of rows and columns."), {ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY, ESL_CMANDATORY}}, {EXIF_TAG_SAMPLES_PER_PIXEL, "SamplesPerPixel", N_("Samples per Pixel"), N_("The number of components per pixel. Since this standard applies " "to RGB and YCbCr images, the value set for this tag is 3. " "In JPEG compressed data a JPEG marker is used instead of this " "tag.")}, {EXIF_TAG_ROWS_PER_STRIP, "RowsPerStrip", N_("Rows per Strip"), N_("The number of rows per strip. This is the number of rows " "in the image of one strip when an image is divided into " "strips. With JPEG compressed data this designation is not " "needed and is omitted. See also and " ".")}, {EXIF_TAG_STRIP_BYTE_COUNTS, "StripByteCounts", N_("Strip Byte Count"), N_("The total number of bytes in each strip. With JPEG compressed " "data this designation is not needed and is omitted.")}, {EXIF_TAG_X_RESOLUTION, "XResolution", N_("x-Resolution"), N_("The number of pixels per in the " "direction. When the image resolution is unknown, 72 [dpi] " "is designated.")}, {EXIF_TAG_Y_RESOLUTION, "YResolution", N_("y-Resolution"), N_("The number of pixels per in the " "direction. The same value as is designated.")}, {EXIF_TAG_PLANAR_CONFIGURATION, "PlanarConfiguration", N_("Planar Configuration"), N_("Indicates whether pixel components are recorded in a chunky " "or planar format. In JPEG compressed files a JPEG marker " "is used instead of this tag. If this field does not exist, " "the TIFF default of 1 (chunky) is assumed.")}, {EXIF_TAG_RESOLUTION_UNIT, "ResolutionUnit", N_("Resolution Unit"), N_("The unit for measuring and . The same " "unit is used for both and . If " "the image resolution is unknown, 2 (inches) is designated.")}, {EXIF_TAG_TRANSFER_FUNCTION, "TransferFunction", N_("Transfer Function"), N_("A transfer function for the image, described in tabular style. " "Normally this tag is not necessary, since color space is " "specified in the color space information tag ().")}, {EXIF_TAG_SOFTWARE, "Software", N_("Software"), N_("This tag records the name and version of the software or " "firmware of the camera or image input device used to " "generate the image. The detailed format is not specified, but " "it is recommended that the example shown below be " "followed. When the field is left blank, it is treated as " "unknown.")}, {EXIF_TAG_DATE_TIME, "DateTime", N_("Date and Time"), N_("The date and time of image creation. In this standard " "(EXIF-2.1) it is the date and time the file was changed.")}, {EXIF_TAG_ARTIST, "Artist", N_("Artist"), N_("This tag records the name of the camera owner, photographer or " "image creator. The detailed format is not specified, but it is " "recommended that the information be written as in the example " "below for ease of Interoperability. When the field is " "left blank, it is treated as unknown.")}, {EXIF_TAG_WHITE_POINT, "WhitePoint", N_("White Point"), N_("The chromaticity of the white point of the image. Normally " "this tag is not necessary, since color space is specified " "in the colorspace information tag ().")}, {EXIF_TAG_PRIMARY_CHROMATICITIES, "PrimaryChromaticities", N_("Primary Chromaticities"), N_("The chromaticity of the three primary colors of the image. " "Normally this tag is not necessary, since colorspace is " "specified in the colorspace information tag ().")}, {EXIF_TAG_TRANSFER_RANGE, "TransferRange", N_("Transfer Range"), ""}, {EXIF_TAG_SUB_IFDS, "SubIFDs", "SubIFD Offsets", N_("Defined by Adobe Corporation " "to enable TIFF Trees within a TIFF file.")}, {EXIF_TAG_JPEG_PROC, "JPEGProc", "JPEGProc", ""}, {EXIF_TAG_JPEG_INTERCHANGE_FORMAT, "JPEGInterchangeFormat", N_("JPEG Interchange Format"), N_("The offset to the start byte (SOI) of JPEG compressed " "thumbnail data. This is not used for primary image " "JPEG data.")}, {EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, "JPEGInterchangeFormatLength", N_("JPEG Interchange Format Length"), N_("The number of bytes of JPEG compressed thumbnail data. This " "is not used for primary image JPEG data. JPEG thumbnails " "are not divided but are recorded as a continuous JPEG " "bitstream from SOI to EOI. Appn and COM markers should " "not be recorded. Compressed thumbnails must be recorded in no " "more than 64 Kbytes, including all other data to be " "recorded in APP1.")}, {EXIF_TAG_YCBCR_COEFFICIENTS, "YCbCrCoefficients", N_("YCbCr Coefficients"), N_("The matrix coefficients for transformation from RGB to YCbCr " "image data. No default is given in TIFF; but here the " "value given in Appendix E, \"Color Space Guidelines\", is used " "as the default. The color space is declared in a " "color space information tag, with the default being the value " "that gives the optimal image characteristics " "Interoperability this condition.")}, {EXIF_TAG_YCBCR_SUB_SAMPLING, "YCbCrSubSampling", N_("YCbCr Sub-Sampling"), N_("The sampling ratio of chrominance components in relation to the " "luminance component. In JPEG compressed data a JPEG marker " "is used instead of this tag.")}, {EXIF_TAG_YCBCR_POSITIONING, "YCbCrPositioning", N_("YCbCr Positioning"), N_("The position of chrominance components in relation to the " "luminance component. This field is designated only for " "JPEG compressed data or uncompressed YCbCr data. The TIFF " "default is 1 (centered); but when Y:Cb:Cr = 4:2:2 it is " "recommended in this standard that 2 (co-sited) be used to " "record data, in order to improve the image quality when viewed " "on TV systems. When this field does not exist, the reader shall " "assume the TIFF default. In the case of Y:Cb:Cr = 4:2:0, the " "TIFF default (centered) is recommended. If the reader " "does not have the capability of supporting both kinds of " ", it shall follow the TIFF default regardless " "of the value in this field. It is preferable that readers " "be able to support both centered and co-sited positioning.")}, {EXIF_TAG_REFERENCE_BLACK_WHITE, "ReferenceBlackWhite", N_("Reference Black/White"), N_("The reference black point value and reference white point " "value. No defaults are given in TIFF, but the values " "below are given as defaults here. The color space is declared " "in a color space information tag, with the default " "being the value that gives the optimal image characteristics " "Interoperability these conditions.")}, {EXIF_TAG_XML_PACKET, "XMLPacket", N_("XML Packet"), N_("XMP Metadata")}, {EXIF_TAG_RELATED_IMAGE_FILE_FORMAT, "RelatedImageFileFormat", "RelatedImageFileFormat", ""}, {EXIF_TAG_RELATED_IMAGE_WIDTH, "RelatedImageWidth", "RelatedImageWidth", ""}, {EXIF_TAG_RELATED_IMAGE_LENGTH, "RelatedImageLength", "RelatedImageLength", ""}, {EXIF_TAG_CFA_REPEAT_PATTERN_DIM, "CFARepeatPatternDim", "CFARepeatPatternDim", ""}, {EXIF_TAG_CFA_PATTERN, "CFAPattern", N_("CFA Pattern"), N_("Indicates the color filter array (CFA) geometric pattern of the " "image sensor when a one-chip color area sensor is used. " "It does not apply to all sensing methods.")}, {EXIF_TAG_BATTERY_LEVEL, "BatteryLevel", N_("Battery Level"), ""}, {EXIF_TAG_COPYRIGHT, "Copyright", N_("Copyright"), N_("Copyright information. In this standard the tag is used to " "indicate both the photographer and editor copyrights. It is " "the copyright notice of the person or organization claiming " "rights to the image. The Interoperability copyright " "statement including date and rights should be written in this " "field; e.g., \"Copyright, John Smith, 19xx. All rights " "reserved.\". In this standard the field records both the " "photographer and editor copyrights, with each recorded in a " "separate part of the statement. When there is a clear " "distinction between the photographer and editor copyrights, " "these are to be written in the order of photographer followed " "by editor copyright, separated by NULL (in this case, " "since the statement also ends with a NULL, there are two NULL " "codes) (see example 1). When only the photographer is given, " "it is terminated by one NULL code (see example 2). When only " "the editor copyright is given, " "the photographer copyright part consists of one space followed " "by a terminating NULL code, then the editor copyright is given " "(see example 3). When the field is left blank, it is treated " "as unknown.")}, {EXIF_TAG_EXPOSURE_TIME, "ExposureTime", N_("Exposure Time"), N_("Exposure time, given in seconds (sec).")}, {EXIF_TAG_FNUMBER, "FNumber", N_("FNumber"), N_("The F number.")}, {EXIF_TAG_IPTC_NAA, "IPTC/NAA", "IPTC/NAA", ""}, {EXIF_TAG_IMAGE_RESOURCES, "ImageResources", N_("Image Resources Block"), ""}, {EXIF_TAG_EXIF_IFD_POINTER, "ExifIFDPointer", "ExifIFDPointer", N_("A pointer to the Exif IFD. Interoperability, Exif IFD has the " "same structure as that of the IFD specified in TIFF. " "ordinarily, however, it does not contain image data as in " "the case of TIFF.")}, {EXIF_TAG_INTER_COLOR_PROFILE, "InterColorProfile", "InterColorProfile", ""}, {EXIF_TAG_EXPOSURE_PROGRAM, "ExposureProgram", "ExposureProgram", N_("The class of the program used by the camera to set exposure " "when the picture is taken.")}, {EXIF_TAG_SPECTRAL_SENSITIVITY, "SpectralSensitivity", N_("Spectral Sensitivity"), N_("Indicates the spectral sensitivity of each channel of the " "camera used. The tag value is an ASCII string compatible " "with the standard developed by the ASTM Technical committee.")}, {EXIF_TAG_GPS_INFO_IFD_POINTER, "GPSInfoIFDPointer", "GPSInfoIFDPointer", N_("A pointer to the GPS Info IFD. The " "Interoperability structure of the GPS Info IFD, like that of " "Exif IFD, has no image data.")}, #if 0 {EXIF_TAG_GPS_VERSION_ID, "GPSVersionID", "", N_("Indicates the version of . The version is given " "as 2.0.0.0. This tag is mandatory when tag is " "present. (Note: The tag. When the version is " "2.0.0.0, the tag value is 02000000.H).")}, {EXIF_TAG_GPS_LATITUDE_REF, "GPSLatitudeRef", "" N_("Indicates whether the latitude is north or south latitude. The " "ASCII value 'N' indicates north latitude, and 'S' is south " "latitude.")}, {EXIF_TAG_GPS_LATITUDE, "GPSLatitude", "" N_("Indicates the latitude. The latitude is expressed as three " "RATIONAL values giving the degrees, minutes, and seconds, " "respectively. When degrees, minutes and seconds are expressed, " "the format is dd/1,mm/1,ss/1. When degrees and minutes are used " "and, for example, fractions of minutes are given up to two " "two decimal places, the format is dd/1,mmmm/100,0/1.")}, {EXIF_TAG_GPS_LONGITUDE_REF, "GPSLongitudeRef", "" N_("Indicates whether the longitude is east or west longitude. " "ASCII 'E' indicates east longitude, and 'W' is west " "longitude.")}, {EXIF_TAG_GPS_LONGITUDE, "GPSLongitude", "" N_("Indicates the longitude. The longitude is expressed as three " "RATIONAL values giving the degrees, minutes, and seconds, " "respectively. When degrees, minutes and seconds are expressed, " "the format is ddd/1,mm/1,ss/1. When degrees and minutes are " "used and, for example, fractions of minutes are given up to " "two decimal places, the format is ddd/1,mmmm/100,0/1.")}, #endif {EXIF_TAG_ISO_SPEED_RATINGS, "ISOSpeedRatings", N_("ISO Speed Ratings"), N_("Indicates the ISO Speed and ISO Latitude of the camera or " "input device as specified in ISO 12232.")}, {EXIF_TAG_OECF, "OECF", "OECF", N_("Indicates the Opto-Electoric Conversion Function (OECF) " "specified in ISO 14524. is the relationship between " "the camera optical input and the image values.")}, {EXIF_TAG_EXIF_VERSION, "ExifVersion", N_("Exif Version"), N_("The version of this standard supported. Nonexistence of this " "field is taken to mean nonconformance to the standard.")}, {EXIF_TAG_DATE_TIME_ORIGINAL, "DateTimeOriginal", N_("Date and Time (original)"), N_("The date and time when the original image data was generated. " "For a digital still camera " "the date and time the picture was taken are recorded.")}, {EXIF_TAG_DATE_TIME_DIGITIZED, "DateTimeDigitized", N_("Date and Time (digitized)"), N_("The date and time when the image was stored as digital data. ")}, {EXIF_TAG_COMPONENTS_CONFIGURATION, "ComponentsConfiguration", "ComponentsConfiguration", N_("Information specific to compressed data. The channels of " "each component are arranged in order from the 1st " "component to the 4th. For uncompressed data the data " "arrangement is given in the tag. " "However, since can only " "express the order of Y, Cb and Cr, this tag is provided " "for cases when compressed data uses components other than " "Y, Cb, and Cr and to enable support of other sequences.")}, {EXIF_TAG_COMPRESSED_BITS_PER_PIXEL, "CompressedBitsPerPixel", N_("Compressed Bits per Pixel"), N_("Information specific to compressed data. The compression mode " "used for a compressed image is indicated in unit bits " "per pixel.")}, {EXIF_TAG_SHUTTER_SPEED_VALUE, "ShutterSpeedValue", N_("Shutter speed"), N_("Shutter speed. The unit is the APEX (Additive System of " "Photographic Exposure) setting (see Appendix C).")}, {EXIF_TAG_APERTURE_VALUE, "ApertureValue", N_("Aperture"), N_("The lens aperture. The unit is the APEX value.")}, {EXIF_TAG_BRIGHTNESS_VALUE, "BrightnessValue", N_("Brightness"), N_("The value of brightness. The unit is the APEX value. " "Ordinarily it is given in the range of -99.99 to 99.99.")}, {EXIF_TAG_EXPOSURE_BIAS_VALUE, "ExposureBiasValue", N_("Exposure Bias"), N_("The exposure bias. The units is the APEX value. Ordinarily " "it is given in the range of -99.99 to 99.99.")}, {EXIF_TAG_MAX_APERTURE_VALUE, "MaxApertureValue", "MaxApertureValue", N_("The smallest F number of the lens. The unit is the APEX value. " "Ordinarily it is given in the range of 00.00 to 99.99, " "but it is not limited to this range.")}, {EXIF_TAG_SUBJECT_DISTANCE, "SubjectDistance", N_("Subject Distance"), N_("The distance to the subject, given in meters.")}, {EXIF_TAG_METERING_MODE, "MeteringMode", N_("Metering Mode"), N_("The metering mode.")}, {EXIF_TAG_LIGHT_SOURCE, "LightSource", N_("Light Source"), N_("The kind of light source.")}, {EXIF_TAG_FLASH, "Flash", N_("Flash"), N_("This tag is recorded when an image is taken using a strobe " "light (flash).")}, {EXIF_TAG_FOCAL_LENGTH, "FocalLength", N_("Focal Length"), N_("The actual focal length of the lens, in mm. Conversion is not " "made to the focal length of a 35 mm film camera.")}, {EXIF_TAG_MAKER_NOTE, "MakerNote", N_("Maker Note"), N_("A tag for manufacturers of Exif writers to record any desired " "information. The contents are up to the manufacturer.")}, {EXIF_TAG_USER_COMMENT, "UserComment", N_("User Comment"), N_("A tag for Exif users to write keywords or comments on the image " "besides those in , and without the " "character code limitations of the tag. The " "character code used in the tag is identified " "based on an ID code in a fixed 8-byte area at the start of " "the tag data area. The unused portion of the area is padded " "with NULL (\"00.h\"). ID codes are assigned by means of " "registration. The designation method and references for each " "character code are given in Table 6. The value of CountN " "is determinated based on the 8 bytes in the character code " "area and the number of bytes in the user comment part. Since " "the TYPE is not ASCII, NULL termination is not necessary " "(see Fig. 9). " "The ID code for the area may be a Defined code " "such as JIS or ASCII, or may be Undefined. The Undefined name " "is UndefinedText, and the ID code is filled with 8 bytes of all " "\"NULL\" (\"00.H\"). An Exif reader that reads the " " tag must have a function for determining the " "ID code. This function is not required in Exif readers that " "do not use the tag (see Table 7). " "When a area is set aside, it is recommended that " "the ID code be ASCII and that the following user comment " "part be filled with blank characters [20.H].")}, {EXIF_TAG_SUB_SEC_TIME, "SubsecTime", "SubsecTime", N_("A tag used to record fractions of seconds for the " " tag.")}, {EXIF_TAG_SUB_SEC_TIME_ORIGINAL, "SubSecTimeOriginal", "SubSecTimeOriginal", N_("A tag used to record fractions of seconds for the " " tag.")}, {EXIF_TAG_SUB_SEC_TIME_DIGITIZED, "SubSecTimeDigitized", "SubSecTimeDigitized", N_("A tag used to record fractions of seconds for the " " tag.")}, {EXIF_TAG_FLASH_PIX_VERSION, "FlashPixVersion", "FlashPixVersion", N_("The FlashPix format version supported by a FPXR file.")}, {EXIF_TAG_COLOR_SPACE, "ColorSpace", N_("Color Space"), N_("The color space information tag is always " "recorded as the color space specifier. Normally sRGB (=1) " "is used to define the color space based on the PC monitor " "conditions and environment. If a color space other than " "sRGB is used, Uncalibrated (=FFFF.H) is set. Image data " "recorded as Uncalibrated can be treated as sRGB when it is " "converted to FlashPix. On sRGB see Appendix E.")}, {EXIF_TAG_PIXEL_X_DIMENSION, "PixelXDimension", "PixelXDimension", N_("Information specific to compressed data. When a " "compressed file is recorded, the valid width of the " "meaningful image must be recorded in this tag, whether or " "not there is padding data or a restart marker. This tag " "should not exist in an uncompressed file. For details see " "section 2.8.1 and Appendix F.")}, {EXIF_TAG_PIXEL_Y_DIMENSION, "PixelYDimension", "PixelYDimension", N_("Information specific to compressed data. When a compressed " "file is recorded, the valid height of the meaningful image " "must be recorded in this tag, whether or not there is padding " "data or a restart marker. This tag should not exist in an " "uncompressed file. For details see section 2.8.1 and Appendix " "F. Since data padding is unnecessary in the vertical direction, " "the number of lines recorded in this valid image height tag " "will in fact be the same as that recorded in the SOF.")}, {EXIF_TAG_RELATED_SOUND_FILE, "RelatedSoundFile", "RelatedSoundFile", N_("This tag is used to record the name of an audio file related " "to the image data. The only relational information " "recorded here is the Exif audio file name and extension (an " "ASCII string consisting of 8 characters + '.' + 3 " "characters). The path is not recorded. Stipulations on audio " "are given in section 3.6.3. File naming conventions are " "given in section 3.7.1. " "When using this tag, audio files must be recorded in " "conformance to the Exif audio format. Writers are also allowed " "to store the data such as Audio within APP2 as FlashPix " "extension stream data. " "Audio files must be recorded in conformance to the Exif audio " "format. The mapping of Exif image files and audio files is done " "in any of the three ways shown in Table 8. If multiple files " "are mapped to one file as in [2] or [3] of this table, the above " "format is used to record just one audio file name. If " "there are multiple audio files, the first recorded file is " "given. In the case of [3] in Table 8, for example, for the " "Exif image file \"DSC00001.JPG\" only \"SND00001.WAV\" is " "given as the related Exif audio file. When there are three " "Exif audio files \"SND00001.WAV\", \"SND00002.WAV\" and " "\"SND00003.WAV\", the Exif image file name for each of them, " "\"DSC00001.JPG\", is indicated. By combining multiple " "relational information, a variety of playback possibilities " "can be supported. The method of using relational information " "is left to the implementation on the playback side. Since this " "information is an ASCII character string, it is terminated by " "NULL. When this tag is used to map audio files, the relation " "of the audio file to image data must also be indicated on the " "audio file end.")}, {EXIF_TAG_INTEROPERABILITY_IFD_POINTER, "InteroperabilityIFDPointer", "InteroperabilityIFDPointer", N_("Interoperability IFD is composed of tags which stores the " "information to ensure the Interoperability and pointed " "by the following tag located in Exif IFD. " "The Interoperability structure of Interoperability IFD is " "the same as TIFF defined IFD structure " "but does not contain the " "image data characteristically compared with normal TIFF " "IFD.")}, {EXIF_TAG_FLASH_ENERGY, "FlashEnergy", N_("Flash Energy"), N_("Indicates the strobe energy at the time the image is " "captured, as measured in Beam Candle Power Seconds (BCPS).")}, {EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE, "SpatialFrequencyResponse", N_("Spatial Frequency Response"), N_("This tag records the camera or input device spatial frequency " "table and SFR values in the direction of image width, " "image height, and diagonal direction, as specified in ISO " "12233.")}, {EXIF_TAG_FOCAL_PLANE_X_RESOLUTION, "FocalPlaneXResolution", N_("Focal Plane x-Resolution"), N_("Indicates the number of pixels in the image width (X) direction " "per on the camera focal plane.")}, {EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION, "FocalPlaneYResolution", N_("Focal Plane y-Resolution"), N_("Indicates the number of pixels in the image height (V) direction " "per on the camera focal plane.")}, {EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT, "FocalPlaneResolutionUnit", N_("Focal Plane Resolution Unit"), N_("Indicates the unit for measuring and " ". This value is the same as the " ".")}, {EXIF_TAG_SUBJECT_LOCATION, "SubjectLocation", N_("Subject Location"), N_("Indicates the location of the main subject in the scene. The " "value of this tag represents the pixel at the center of the " "main subject relative to the left edge, prior to rotation " "processing as per the tag. The first value " "indicates the X column number and second indicates " "the Y row number.")}, {EXIF_TAG_EXPOSURE_INDEX, "ExposureIndex", N_("Exposure index"), N_("Indicates the exposure index selected on the camera or " "input device at the time the image is captured.")}, {EXIF_TAG_SENSING_METHOD, "SensingMethod", N_("Sensing Method"), N_("Indicates the image sensor type on the camera or input " "device.")}, {EXIF_TAG_FILE_SOURCE, "FileSource", N_("File Source"), N_("Indicates the image source. If a DSC recorded the image, " "this tag value of this tag always be set to 3, indicating " "that the image was recorded on a DSC.")}, {EXIF_TAG_SCENE_TYPE, "SceneType", N_("Scene Type"), N_("Indicates the type of scene. If a DSC recorded the image, " "this tag value must always be set to 1, indicating that the " "image was directly photographed.")}, {EXIF_TAG_NEW_CFA_PATTERN, "CFAPattern", N_("CFA Pattern"), N_("Indicates the color filter array (CFA) geometric pattern of the " "image sensor when a one-chip color area sensor is used. " "It does not apply to all sensing methods.")}, {EXIF_TAG_SUBJECT_AREA, "SubjectArea", N_("Subject Area"), N_("This tag indicates the location and area of the main subject " "in the overall scene.")}, {EXIF_TAG_TIFF_EP_STANDARD_ID, "TIFF/EPStandardID", N_("TIFF/EP Standard ID"), ""}, {EXIF_TAG_CUSTOM_RENDERED, "CustomRendered", N_("Custom Rendered"), N_("This tag indicates the use of special processing on image " "data, such as rendering geared to output. When special " "processing is performed, the reader is expected to disable " "or minimize any further processing.")}, {EXIF_TAG_EXPOSURE_MODE, "ExposureMode", N_("Exposure Mode"), N_("This tag indicates the exposure mode set when the image was " "shot. In auto-bracketing mode, the camera shoots a series of " "frames of the same scene at different exposure settings.")}, {EXIF_TAG_WHITE_BALANCE, "WhiteBalance", N_("White Balance"), N_("This tag indicates the white balance mode set when the image " "was shot.")}, {EXIF_TAG_DIGITAL_ZOOM_RATIO, "DigitalZoomRatio", N_("Digital Zoom Ratio"), N_("This tag indicates the digital zoom ratio when the image was " "shot. If the numerator of the recorded value is 0, this " "indicates that digital zoom was not used.")}, {EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM, "FocalLengthIn35mmFilm", N_("Focal Length In 35mm Film"), N_("This tag indicates the equivalent focal length assuming a " "35mm film camera, in mm. A value of 0 means the focal " "length is unknown. Note that this tag differs from the " "FocalLength tag.")}, {EXIF_TAG_SCENE_CAPTURE_TYPE, "SceneCaptureType", N_("Scene Capture Type"), N_("This tag indicates the type of scene that was shot. It can " "also be used to record the mode in which the image was " "shot. Note that this differs from the scene type " "(SceneType) tag.")}, {EXIF_TAG_GAIN_CONTROL, "GainControl", N_("Gain Control"), N_("This tag indicates the degree of overall image gain " "adjustment.")}, {EXIF_TAG_CONTRAST, "Contrast", N_("Contrast"), N_("This tag indicates the direction of contrast processing " "applied by the camera when the image was shot.")}, {EXIF_TAG_SATURATION, "Saturation", N_("Saturation"), N_("This tag indicates the direction of saturation processing " "applied by the camera when the image was shot.")}, {EXIF_TAG_SHARPNESS, "Sharpness", N_("Sharpness"), N_("This tag indicates the direction of sharpness processing " "applied by the camera when the image was shot.")}, {EXIF_TAG_DEVICE_SETTING_DESCRIPTION, "DeviceSettingDescription", N_("Device Setting Description"), N_("This tag indicates information on the picture-taking " "conditions of a particular camera model. The tag is used " "only to indicate the picture-taking conditions in the " "reader.")}, {EXIF_TAG_SUBJECT_DISTANCE_RANGE, "SubjectDistanceRange", N_("Subject Distance Range"), N_("This tag indicates the distance to the subject.")}, {EXIF_TAG_IMAGE_UNIQUE_ID, "ImageUniqueID", N_("Image Unique ID"), N_("This tag indicates an identifier assigned uniquely to " "each image. It is recorded as an ASCII string equivalent " "to hexadecimal notation and 128-bit fixed length.")}, {0, NULL, NULL, NULL} }; /* For now, do not use these functions. */ ExifTag exif_tag_table_get_tag (unsigned int n); const char *exif_tag_table_get_name (unsigned int n); unsigned int exif_tag_table_count (void); ExifTag exif_tag_table_get_tag (unsigned int n) { return (n < exif_tag_table_count ()) ? ExifTagTable[n].tag : 0; } const char * exif_tag_table_get_name (unsigned int n) { return (n < exif_tag_table_count ()) ? ExifTagTable[n].name : NULL; } unsigned int exif_tag_table_count (void) { return sizeof (ExifTagTable) / sizeof (ExifTagTable[0]); } const char * exif_tag_get_name (ExifTag tag) { unsigned int i; for (i = 0; ExifTagTable[i].name; i++) if (ExifTagTable[i].tag == tag) break; return ExifTagTable[i].name; } const char * exif_tag_get_title (ExifTag tag) { unsigned int i; /* FIXME: This belongs to somewhere else. */ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); for (i = 0; ExifTagTable[i].title; i++) if (ExifTagTable[i].tag == tag) break; return _(ExifTagTable[i].title); } const char * exif_tag_get_description (ExifTag tag) { unsigned int i; bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); for (i = 0; ExifTagTable[i].description; i++) if (ExifTagTable[i].tag == tag) break; return _(ExifTagTable[i].description); } ExifTag exif_tag_from_name (const char *name) { unsigned int i; if (!name) return 0; for (i = 0; ExifTagTable[i].name; i++) if (!strcmp (ExifTagTable[i].name, name)) break; return ExifTagTable[i].tag; } const char * exif_tag_get_name_index (unsigned int i, ExifTag *tag) { if (!ExifTagTable[i].name) return NULL; *tag = ExifTagTable[i].tag; return (ExifTagTable[i].name); }