+++ /dev/null
-/*
- * GQView
- * (C) 2004 John Ellis
- *
- * Authors:
- * Support for Exif file format, originally written by Eric Swalens.
- * Modified by Quy Tonthat
- *
- * Reimplemented with generic data storage by John Ellis (Nov 2003)
- *
- * The tags were added with information from the FREE document:
- * http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
- *
- * For the official Exif Format, please refer to:
- * http://www.exif.org
- * http://www.exif.org/specifications.html (PDF spec sheets)
- *
- * Notes:
- * Additional tag formats should be added to the proper
- * location in ExifKnownMarkersList[].
- *
- * Human readable ouput (that needs additional processing of data to
- * be useable) can be defined by adding a key to ExifFormattedList[],
- * then handling that tag in the function exif_get_formatted_by_key().
- * The human readable formatted keys must begin with the character 'f'.
- *
- * Unsupported at this time:
- * IFD1 (thumbnail)
- * MakerNote
- * GPSInfo
- *
- * TODO:
- * Convert data to useable form in the ??_as_text function for:
- * ComponentsConfiguration
- * UserComment (convert this to UTF-8?)
- *
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdio.h>
-#include <inttypes.h> /* stdint.h is not available on all systems... */
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <math.h>
-
-#include <glib.h>
-
-#include "intl.h"
-
-#include "exif.h"
-
-#include "ui_fileops.h"
-
-
-/*
- *-----------------------------------------------------------------------------
- * Tag formats
- *-----------------------------------------------------------------------------
- */
-
-ExifFormatAttrib ExifFormatList[] = {
- { EXIF_FORMAT_UNKNOWN, 1, "unknown", "unknown" },
- { EXIF_FORMAT_BYTE_UNSIGNED, 1, "ubyte", "unsigned byte" },
- { EXIF_FORMAT_STRING, 1, "string", "string" },
- { EXIF_FORMAT_SHORT_UNSIGNED, 2, "ushort", "unsigned short" },
- { EXIF_FORMAT_LONG_UNSIGNED, 4, "ulong", "unsigned long" },
- { EXIF_FORMAT_RATIONAL_UNSIGNED,8, "urational", "unsigned rational" },
- { EXIF_FORMAT_BYTE, 1, "byte", "byte" },
- { EXIF_FORMAT_UNDEFINED, 1, "undefined", "undefined" },
- { EXIF_FORMAT_SHORT, 2, "sshort", "signed short" },
- { EXIF_FORMAT_LONG, 4, "slong", "signed long" },
- { EXIF_FORMAT_RATIONAL, 8, "srational", "signed rational" },
- { EXIF_FORMAT_FLOAT, 4, "float", "float" },
- { EXIF_FORMAT_DOUBLE, 8, "double", "double" },
- { -1, 0, NULL }
-};
-
-/* tags that are special, or need special treatment */
-#define TAG_EXIFOFFSET 0x8769
-
-
-/*
- *-----------------------------------------------------------------------------
- * Data
- *-----------------------------------------------------------------------------
- */
-
-#define EXIF_TEXT_LIST_END { -1, NULL }
-
-static ExifTextList ExifOrientationList[] = {
- { EXIF_ORIENTATION_UNKNOWN, N_("unknown") },
- { EXIF_ORIENTATION_TOP_LEFT, N_("top left") },
- { EXIF_ORIENTATION_TOP_RIGHT, N_("top right") },
- { EXIF_ORIENTATION_BOTTOM_RIGHT,N_("bottom right") },
- { EXIF_ORIENTATION_BOTTOM_LEFT, N_("bottom left") },
- { EXIF_ORIENTATION_LEFT_TOP, N_("left top") },
- { EXIF_ORIENTATION_RIGHT_TOP, N_("right top") },
- { EXIF_ORIENTATION_RIGHT_BOTTOM,N_("right bottom") },
- { EXIF_ORIENTATION_LEFT_BOTTOM, N_("left bottom") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifUnitList[] = {
- { EXIF_UNIT_UNKNOWN, N_("unknown") },
- { EXIF_UNIT_NOUNIT, "" },
- { EXIF_UNIT_INCH, N_("inch") },
- { EXIF_UNIT_CENTIMETER, N_("centimeter") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifYCbCrPosList[] = {
- { 1, "center" },
- { 2, "datum" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifMeteringModeList[] = {
- { 0, N_("unknown") },
- { 1, N_("average") },
- { 2, N_("center weighted") },
- { 3, N_("spot") },
- { 4, N_("multi-spot") },
- { 5, N_("multi-segment") },
- { 6, N_("partial") },
- { 255, N_("other") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifExposureProgramList[] = {
- { 0, N_("not defined") },
- { 1, N_("manual") },
- { 2, N_("normal") },
- { 3, N_("aperture") },
- { 4, N_("shutter") },
- { 5, N_("creative") },
- { 6, N_("action") },
- { 7, N_("portrait") },
- { 8, N_("landscape") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifLightSourceList[] = {
- { 0, N_("unknown") },
- { 1, N_("daylight") },
- { 2, N_("fluorescent") },
- { 3, N_("tungsten (incandescent)") },
- { 4, N_("flash") },
- { 9, "fine weather" },
- { 10, "cloudy weather" },
- { 11, "shade" },
- { 12, "daylight fluorescent" },
- { 13, "day white fluorescent" },
- { 14, "cool white fluorescent" },
- { 15, "while fluorescent" },
- { 17, "standard light A" },
- { 18, "standard light B" },
- { 19, "standard light C" },
- { 20, "D55" },
- { 21, "D65" },
- { 22, "D75" },
- { 23, "D50" },
- { 24, "ISO studio tungsten" },
- { 255, N_("other") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifFlashList[] = {
- { 0, N_("no") },
- { 1, N_("yes") },
- { 5, N_("yes, not detected by strobe") },
- { 7, N_("yes, detected by strobe") },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifColorSpaceList[] = {
- { 1, "sRGB" },
- { 65535,"uncalibrated" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSensorList[] = {
- { 1, "not defined" },
- { 2, "1 chip color area" },
- { 2, "2 chip color area" },
- { 4, "3 chip color area" },
- { 5, "color sequential area" },
- { 7, "trilinear" },
- { 8, "color sequential linear" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSourceList[] = {
- { 3, "digital still camera" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSceneList[] = {
- { 1, "direct photo" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifCustRenderList[] = {
- { 0, "normal" },
- { 1, "custom" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifExposureModeList[] = {
- { 0, "auto" },
- { 1, "manual" },
- { 2, "auto bracket" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifWhiteBalanceList[] = {
- { 0, "auto" },
- { 1, "manual" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSceneCaptureList[] = {
- { 0, "standard" },
- { 1, "landscape" },
- { 2, "portrait" },
- { 3, "night scene" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifGainControlList[] = {
- { 0, "none" },
- { 1, "low gain up" },
- { 2, "high gain up" },
- { 3, "low gain down" },
- { 4, "high gain down" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifContrastList[] = {
- { 0, "normal" },
- { 1, "soft" },
- { 2, "hard" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSaturationList[] = {
- { 0, "normal" },
- { 1, "low" },
- { 2, "high" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSharpnessList[] = {
- { 0, "normal" },
- { 1, "soft" },
- { 2, "hard" },
- EXIF_TEXT_LIST_END
-};
-
-static ExifTextList ExifSubjectRangeList[] = {
- { 0, "unknown" },
- { 1, "macro" },
- { 2, "close" },
- { 3, "distant" },
- EXIF_TEXT_LIST_END
-};
-
-ExifMarker ExifKnownMarkersList[] = {
-{ 0x010e, EXIF_FORMAT_STRING, -1, "ImageDescription", N_("Image description"), NULL },
-{ 0x010f, EXIF_FORMAT_STRING, -1, "Make", "Camera make", NULL },
-{ 0x0110, EXIF_FORMAT_STRING, -1, "Model", "Camera model", NULL },
-{ 0x0112, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Orientation", N_("Orientation"), ExifOrientationList },
-{ 0x011a, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "XResolution", "X resolution", NULL },
-{ 0x011b, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "YResolution", "Y Resolution", NULL },
-{ 0x0128, EXIF_FORMAT_SHORT_UNSIGNED, 1, "ResolutionUnit", "Resolution units", ExifUnitList },
-{ 0x0131, EXIF_FORMAT_STRING, -1, "Software", "Firmware", NULL },
-{ 0x0132, EXIF_FORMAT_STRING, 20, "DateTime", N_("Date"), NULL },
-{ 0x013e, EXIF_FORMAT_RATIONAL_UNSIGNED, 2, "WhitePoint", "White point", NULL },
-{ 0x013f, EXIF_FORMAT_RATIONAL_UNSIGNED, 6, "PrimaryChromaticities","Primary chromaticities", NULL },
-{ 0x0211, EXIF_FORMAT_RATIONAL_UNSIGNED, 3, "YCbCrCoefficients", "YCbCy coefficients", NULL },
-{ 0x0213, EXIF_FORMAT_SHORT_UNSIGNED, 1, "YCbCrPositioning", "YCbCr positioning", ExifYCbCrPosList },
-{ 0x0214, EXIF_FORMAT_RATIONAL_UNSIGNED, 6, "ReferenceBlackWhite", "Black white reference", NULL },
-{ 0x8298, EXIF_FORMAT_STRING, -1, "Copyright", N_("Copyright"), NULL },
-{ 0x8769, EXIF_FORMAT_LONG_UNSIGNED, 1, "ExifOffset", "SubIFD Exif offset", NULL },
- /* subIFD follows */
-{ 0x829a, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "ExposureTime", "Exposure time (seconds)", NULL },
-{ 0x829d, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FNumber", "FNumber", NULL },
-{ 0x8822, EXIF_FORMAT_SHORT_UNSIGNED, 1, "ExposureProgram", N_("Exposure program"), ExifExposureProgramList },
-{ 0x8824, EXIF_FORMAT_STRING, -1, "SpectralSensitivity", "Spectral Sensitivity", NULL },
-{ 0x8827, EXIF_FORMAT_SHORT_UNSIGNED, -1, "ISOSpeedRatings", N_("ISO sensitivity"), NULL },
-{ 0x8828, EXIF_FORMAT_UNDEFINED, -1, "OECF", "Optoelectric conversion factor", NULL },
-{ 0x9000, EXIF_FORMAT_UNDEFINED, 4, "ExifVersion", "Exif version", NULL },
-{ 0x9003, EXIF_FORMAT_STRING, 20, "DateTimeOriginal", N_("Date original"), NULL },
-{ 0x9004, EXIF_FORMAT_STRING, 20, "DateTimeDigitized", N_("Date digitized"), NULL },
-{ 0x9101, EXIF_FORMAT_UNDEFINED, -1, "ComponentsConfiguration","Pixel format", NULL },
-{ 0x9102, EXIF_FORMAT_RATIONAL_UNSIGNED,1, "CompressedBitsPerPixel","Compression ratio", NULL },
-{ 0x9201, EXIF_FORMAT_RATIONAL, 1, "ShutterSpeedValue", N_("Shutter speed"), NULL },
-{ 0x9202, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "ApertureValue", N_("Aperture"), NULL },
-{ 0x9203, EXIF_FORMAT_RATIONAL, 1, "BrightnessValue", "Brightness", NULL },
-{ 0x9204, EXIF_FORMAT_RATIONAL, 1, "ExposureBiasValue", N_("Exposure bias"), NULL },
-{ 0x9205, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "MaxApertureValue", "Maximum aperture", NULL },
-{ 0x9206, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "SubjectDistance", N_("Subject distance"), NULL },
-{ 0x9207, EXIF_FORMAT_SHORT_UNSIGNED, 1, "MeteringMode", N_("Metering mode"), ExifMeteringModeList },
-{ 0x9208, EXIF_FORMAT_SHORT_UNSIGNED, 1, "LightSource", N_("Light source"), ExifLightSourceList },
-{ 0x9209, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Flash", N_("Flash"), ExifFlashList },
-{ 0x920a, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FocalLength", N_("Focal length"), NULL },
-{ 0x9214, EXIF_FORMAT_SHORT_UNSIGNED, -1, "SubjectArea", "Subject area", NULL },
-{ 0x927c, EXIF_FORMAT_UNDEFINED, -1, "MakerNote", "MakerNote", NULL },
-{ 0x9286, EXIF_FORMAT_UNDEFINED, -1, "UserComment", "UserComment", NULL },
-{ 0x9290, EXIF_FORMAT_STRING, -1, "SubsecTime", "Subsecond time", NULL },
-{ 0x9291, EXIF_FORMAT_STRING, -1, "SubsecTimeOriginal", "Subsecond time original", NULL },
-{ 0x9292, EXIF_FORMAT_STRING, -1, "SubsecTimeDigitized", "Subsecond time digitized", NULL },
-{ 0xa000, EXIF_FORMAT_UNDEFINED, 4, "FlashPixVersion", "FlashPix version", NULL },
-{ 0xa001, EXIF_FORMAT_SHORT_UNSIGNED, 1, "ColorSpace", "Colorspace", ExifColorSpaceList },
- /* ExifImageWidth, ExifImageHeight can also be unsigned short */
-{ 0xa002, EXIF_FORMAT_LONG_UNSIGNED, 1, "ExifImageWidth", N_("Width"), NULL },
-{ 0xa003, EXIF_FORMAT_LONG_UNSIGNED, 1, "ExifImageHeight", N_("Height"), NULL },
-{ 0xa004, EXIF_FORMAT_STRING, -1, "RelatedSoundFile", "Audio data", NULL },
-{ 0xa005, EXIF_FORMAT_LONG_UNSIGNED, 1, "ExifInteroperabilityOffset", "ExifR98 extension", NULL },
-{ 0xa20b, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FlashEnergy", "Flash strength", NULL },
-{ 0xa20c, EXIF_FORMAT_SHORT_UNSIGNED, 1, "SpatialFrequencyResponse","Spatial frequency response", NULL },
-{ 0xa20e, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FocalPlaneXResolution", "X Pixel density", NULL },
-{ 0xa20f, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FocalPlaneYResolution", "Y Pixel density", NULL },
-{ 0xa210, EXIF_FORMAT_SHORT_UNSIGNED, 1, "FocalPlaneResolutionUnit", "Pixel density units", ExifUnitList },
-{ 0x0214, EXIF_FORMAT_SHORT_UNSIGNED, 2, "SubjectLocation", "Subject location", NULL },
-{ 0xa215, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "ExposureIndex", N_("ISO sensitivity"), NULL },
-{ 0xa217, EXIF_FORMAT_SHORT_UNSIGNED, -1, "SensingMethod", "Sensor type", ExifSensorList },
-{ 0xa300, EXIF_FORMAT_UNDEFINED, 1, "FileSource", "Source type", ExifSourceList },
-{ 0xa301, EXIF_FORMAT_UNDEFINED, 1, "SceneType", "Scene type", ExifSceneList },
-{ 0xa302, EXIF_FORMAT_UNDEFINED, -1, "CFAPattern", "Color filter array pattern", NULL },
- /* tags a4xx were added for Exif 2.2 (not just these - some above, as well) */
-{ 0xa401, EXIF_FORMAT_SHORT_UNSIGNED, 1, "CustomRendered", "Render process", ExifCustRenderList },
-{ 0xa402, EXIF_FORMAT_SHORT_UNSIGNED, 1, "ExposureMode", "Exposure mode", ExifExposureModeList },
-{ 0xa403, EXIF_FORMAT_SHORT_UNSIGNED, 1, "WhiteBalance", "White balance", ExifWhiteBalanceList },
-{ 0xa404, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "DigitalZoomRatio", "Digital zoom ratio", NULL },
-{ 0xa405, EXIF_FORMAT_SHORT_UNSIGNED, 1, "FocalLength35mmFilm", "Focal length (35mm)", NULL },
-{ 0xa406, EXIF_FORMAT_SHORT_UNSIGNED, 1, "SceneCapturetype", "Scene capture type", ExifSceneCaptureList },
-{ 0xa407, EXIF_FORMAT_SHORT_UNSIGNED, 1, "GainControl", "Gain control", ExifGainControlList },
-{ 0xa408, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Contrast", "Contrast", ExifContrastList },
-{ 0xa409, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Saturation", "Saturation", ExifSaturationList },
-{ 0xa40a, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Sharpness", "Sharpness", ExifSharpnessList },
-{ 0xa40b, EXIF_FORMAT_UNDEFINED, -1, "DeviceSettingDescription","Device setting", NULL },
-{ 0xa40c, EXIF_FORMAT_SHORT_UNSIGNED, 1, "SubjectDistanceRange", "Subject range", ExifSubjectRangeList },
-{ 0xa420, EXIF_FORMAT_STRING, -1, "ImageUniqueID", "Image serial number", NULL },
- /* place known, but undocumented or lesser used tags here */
-{ 0x00fe, EXIF_FORMAT_LONG_UNSIGNED, 1, "NewSubfileType", NULL, NULL },
-{ 0x00ff, EXIF_FORMAT_SHORT_UNSIGNED, 1, "SubfileType", NULL, NULL },
-{ 0x012d, EXIF_FORMAT_SHORT_UNSIGNED, 3, "TransferFunction", NULL, NULL },
-{ 0x013b, EXIF_FORMAT_STRING, -1, "Artist", "Artist", NULL },
-{ 0x013d, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Predictor", NULL, NULL },
-{ 0x0142, EXIF_FORMAT_SHORT_UNSIGNED, 1, "TileWidth", NULL, NULL },
-{ 0x0143, EXIF_FORMAT_SHORT_UNSIGNED, 1, "TileLength", NULL, NULL },
-{ 0x0144, EXIF_FORMAT_LONG_UNSIGNED, -1, "TileOffsets", NULL, NULL },
-{ 0x0145, EXIF_FORMAT_SHORT_UNSIGNED, -1, "TileByteCounts", NULL, NULL },
-{ 0x014a, EXIF_FORMAT_LONG_UNSIGNED, -1, "SubIFDs", NULL, NULL },
-{ 0x015b, EXIF_FORMAT_UNDEFINED, -1, "JPEGTables", NULL, NULL },
-{ 0x828d, EXIF_FORMAT_SHORT_UNSIGNED, 2, "CFARepeatPatternDim", NULL, NULL },
-{ 0x828e, EXIF_FORMAT_BYTE_UNSIGNED, -1, "CFAPattern", NULL, NULL },
-{ 0x828f, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "BatteryLevel", NULL, NULL },
-{ 0x83bb, EXIF_FORMAT_LONG_UNSIGNED, -1, "IPTC/NAA", NULL, NULL },
-{ 0x8773, EXIF_FORMAT_UNDEFINED, -1, "InterColorProfile", NULL, NULL },
-{ 0x8825, EXIF_FORMAT_LONG_UNSIGNED, 1, "GPSInfo", "SubIFD GPS offset", NULL },
-{ 0x8829, EXIF_FORMAT_SHORT_UNSIGNED, 1, "Interlace", NULL, NULL },
-{ 0x882a, EXIF_FORMAT_SHORT, 1, "TimeZoneOffset", NULL, NULL },
-{ 0x882b, EXIF_FORMAT_SHORT_UNSIGNED, 1, "SelfTimerMode", NULL, NULL },
-{ 0x920b, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "FlashEnergy", NULL, NULL },
-{ 0x920c, EXIF_FORMAT_UNDEFINED, -1, "SpatialFrequencyResponse", NULL, NULL },
-{ 0x920d, EXIF_FORMAT_UNDEFINED, -1, "Noise", NULL, NULL },
-{ 0x9211, EXIF_FORMAT_LONG_UNSIGNED, 1, "ImageNumber", NULL, NULL },
-{ 0x9212, EXIF_FORMAT_STRING, 1, "SecurityClassification", NULL, NULL },
-{ 0x9213, EXIF_FORMAT_STRING, -1, "ImageHistory", NULL, NULL },
-{ 0x9215, EXIF_FORMAT_RATIONAL_UNSIGNED, 1, "ExposureIndex", NULL, NULL },
-{ 0x9216, EXIF_FORMAT_BYTE_UNSIGNED, 4, "TIFF/EPStandardID", NULL, NULL },
-
- /* end is marked by 0 tag */
-{ 0x0000, EXIF_FORMAT_UNKNOWN, 0, NULL, NULL, NULL }
-};
-
-ExifMarker ExifUnknownMarkersList[] = {
-{ 0x0000, EXIF_FORMAT_UNKNOWN, 0, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_BYTE_UNSIGNED, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_STRING, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_SHORT_UNSIGNED, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_LONG_UNSIGNED, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_RATIONAL_UNSIGNED, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_BYTE, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_UNDEFINED, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_SHORT, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_LONG, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_RATIONAL, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_FLOAT, -1, "unknown", NULL, NULL },
-{ 0x0000, EXIF_FORMAT_DOUBLE, -1, "unknown", NULL, NULL },
-};
-
-/* human readable key list */
-
-ExifFormattedText ExifFormattedList[] = {
- { "fCamera", N_("Camera") },
- { "fDateTime", N_("Date") },
- { "fShutterSpeed", N_("Shutter speed") },
- { "fAperture", N_("Aperture") },
- { "fExposureBias", N_("Exposure bias") },
- { "fISOSpeedRating", N_("ISO sensitivity") },
- { "fFocalLength", N_("Focal length") },
- { "fSubjectDistance", N_("Subject distance") },
- { "fFlash", N_("Flash") },
- { "fResolution", N_("Resolution") },
- { NULL, NULL }
-};
-
-
-/*
- *-----------------------------------------------------------------------------
- * misc
- *-----------------------------------------------------------------------------
- */
-
-#define BYTE_ORDER_INTEL 1
-#define BYTE_ORDER_MOTOROLA 2
-
-#define MARKER_UNKNOWN 0x00
-#define MARKER_SOI 0xD8
-#define MARKER_APP1 0xE1
-
-typedef struct {
- char byte_order[2];
- uint16_t magic;
- uint32_t IFD_offset;
-} TIFFHeader;
-
-typedef struct {
- uint16_t tag;
- uint16_t format;
- uint32_t nb;
- uint32_t data;
-} IFDEntry;
-
-
-static ExifMarker *exif_marker_from_tag(uint16_t tag);
-static int parse_IFD_table(ExifData *exif, unsigned char *tiff, int offset,
- int size, int byte_order);
-
-/*
- *-----------------------------------------------------------------------------
- * ExifItem
- *-----------------------------------------------------------------------------
- */
-
-static ExifItem *exif_item_new(ExifFormatType format, unsigned int tag, unsigned int elements, ExifMarker *marker)
-{
- ExifItem *item;
-
- item = g_new0(ExifItem, 1);
- item->format = format;
- item->tag = tag;
- item->marker = marker;
- item->elements = elements;
- item->data = NULL;
- item->data_len = 0;
-
- switch (format)
- {
- case EXIF_FORMAT_UNKNOWN:
- /* unknown, data is NULL */
- return item;
- break;
- case EXIF_FORMAT_BYTE_UNSIGNED:
- item->data_len = sizeof(char) * elements;
- break;
- case EXIF_FORMAT_STRING:
- item->data_len = sizeof(char) * elements;
- break;
- case EXIF_FORMAT_SHORT_UNSIGNED:
- item->data_len = sizeof(unsigned short int) * elements;
- break;
- case EXIF_FORMAT_LONG_UNSIGNED:
- item->data_len = sizeof(unsigned long int) * elements;
- break;
- case EXIF_FORMAT_RATIONAL_UNSIGNED:
- item->data_len = sizeof(ExifRational) * elements;
- break;
- case EXIF_FORMAT_BYTE:
- item->data_len = sizeof(char) * elements;
- break;
- case EXIF_FORMAT_UNDEFINED:
- item->data_len = sizeof(char) * elements;
- break;
- case EXIF_FORMAT_SHORT:
- item->data_len = sizeof(short int) * elements;
- break;
- case EXIF_FORMAT_LONG:
- item->data_len = sizeof(long int) * elements;
- break;
- case EXIF_FORMAT_RATIONAL:
- item->data_len = sizeof(ExifRational) * elements;
- break;
- case EXIF_FORMAT_FLOAT:
- item->data_len = sizeof(float) * elements;
- break;
- case EXIF_FORMAT_DOUBLE:
- item->data_len = sizeof(double) * elements;
- break;
- }
-
- item->data = g_malloc0(item->data_len);
-
- return item;
-}
-
-static void exif_item_free(ExifItem *item)
-{
- if (!item) return;
-
- g_free(item->data);
- g_free(item);
-}
-
-const char *exif_item_get_tag_name(ExifItem *item)
-{
- if (!item || !item->marker) return NULL;
- return item->marker->key;
-}
-
-const char *exif_item_get_description(ExifItem *item)
-{
- if (!item || !item->marker) return NULL;
- return _(item->marker->description);
-}
-
-const char *exif_item_get_format_name(ExifItem *item, gint brief)
-{
- if (!item || !item->marker) return NULL;
- return (brief) ? ExifFormatList[item->format].short_name : ExifFormatList[item->format].description;
-}
-
-
-#define UNDEFINED_TEXT_BYTE_COUNT 16
-
-static GString *string_append_raw_bytes(GString *string, gpointer data, gint ne)
-{
- gint i;
-
- for (i = 0 ; i < ne && i < UNDEFINED_TEXT_BYTE_COUNT; i++)
- {
- unsigned char c = ((char *)data)[i];
- if (c < 32 || c > 127) c = '.';
- g_string_append_printf(string, "%c", c);
- }
- string = g_string_append(string, " : ");
- for (i = 0 ; i < ne && i < UNDEFINED_TEXT_BYTE_COUNT; i++)
- {
- const gchar *spacer;
- if (i > 0)
- {
- if (i%8 == 0)
- {
- spacer = " - ";
- }
- else
- {
- spacer = " ";
- }
- }
- else
- {
- spacer = "";
- }
- g_string_append_printf(string, "%s%02x", spacer, ((char *)data)[i]);
- }
- if (i >= UNDEFINED_TEXT_BYTE_COUNT) g_string_append_printf(string, " (%d bytes)", ne);
-
- return string;
-}
-
-static gchar *text_list_find_value(ExifTextList *list, gint value)
-{
- gchar *result = NULL;
- gint i;
-
- i = 0;
- while (!result && list[i].value >= 0)
- {
- if (value == list[i].value) result = g_strdup(_(list[i].description));
- i++;
- }
- if (!result) result = g_strdup_printf("%d (%s)", value, _("unknown"));
-
- return result;
-}
-
-/*
- *-------------------------------------------------------------------
- * byte size utils
- *-------------------------------------------------------------------
- */
-
-static uint16_t get_int16(unsigned char *f, int bo)
-{
- if (bo == BYTE_ORDER_INTEL)
- return *f + (*(f+1)<<8);
- else
- return ((*f)<<8) + *(f+1);
-}
-
-#if 0
-/* not used ? */
-static uint32_t get_int32(unsigned char *f, int bo)
-{
- if (bo == BYTE_ORDER_INTEL)
- return get_int16(f, BYTE_ORDER_INTEL) + (get_int16(f+2, BYTE_ORDER_INTEL)<<16);
- else
- return (get_int16(f, BYTE_ORDER_MOTOROLA)<<16) + get_int16(f+2, BYTE_ORDER_MOTOROLA);
-}
-#endif
-
-static uint16_t swab_int16(uint16_t n, int bo)
-{
-#if BYTE_ORDER == LITTLE_ENDIAN
- if (bo == BYTE_ORDER_MOTOROLA)
-#else
- if (bo == BYTE_ORDER_INTEL)
-#endif
- return n>>8 | n<<8 ;
- else
- return n;
-}
-
-static uint32_t swab_int32(uint32_t n, int bo)
-{
-#if BYTE_ORDER == LITTLE_ENDIAN
- if (bo == BYTE_ORDER_MOTOROLA)
-#else
- if (bo == BYTE_ORDER_INTEL)
-#endif
- return n<<24 | n>>24 | (n & 0xFF0000)>>8 | (n & 0xFF00)<<8;
- else
- return n;
-}
-
-/*
- *-------------------------------------------------------------------
- * marker utils
- *-------------------------------------------------------------------
- */
-
-static int get_marker_size(unsigned char *f)
-{
- /* Size is always in Motorola byte order */
- return get_int16(f+2, BYTE_ORDER_MOTOROLA);
-}
-
-static int goto_next_marker(unsigned char **f, int *size, int *marker)
-{
- int marker_size = 2;
-
- *marker = MARKER_UNKNOWN;
-
- /* It is safe to access the marker and its size since we have checked
- * the SOI and this function guaranties the whole next marker is
- * available
- */
- if (*(*f+1) != MARKER_SOI)
- {
- marker_size += get_marker_size(*f);
- }
-
- *size -= marker_size;
-
- /* size should be at least 4, so we can read the marker and its size
- * and check data are actually available
- */
- if (*size < 4) return -1;
-
- /* Jump to the next marker and be sure it begins with 0xFF
- */
- *f += marker_size;
- if (**f != 0xFF) return -1;
-
- if (get_marker_size(*f)+2 > *size) return -1;
-
- *marker = *(*f+1);
-
- return 0;
-}
-
-/*
- *-------------------------------------------------------------------
- * IFD utils
- *-------------------------------------------------------------------
- */
-
-static ExifMarker *exif_marker_from_tag(uint16_t tag)
-{
- static int len = sizeof(ExifKnownMarkersList)/sizeof(ExifMarker) - 1;
- int i = 0;
-
- while (i < len && ExifKnownMarkersList[i].tag != tag)
- {
- i++;
- }
-
- return (i >= len ? NULL : &ExifKnownMarkersList[i]);
-}
-
-static void rational_from_data(ExifRational *r, void *src, int byte_order)
-{
- r->num = swab_int32(*(uint32_t*)src, byte_order);
- r->den = swab_int32(*(uint32_t*)(src + sizeof(uint32_t)), byte_order);
-}
-
-static void exif_item_copy_data(ExifItem *item, void *src, int len, ExifFormatType src_format, int byte_order)
-{
- int bs;
- int ne;
- gpointer dest;
- int i;
-
- bs = ExifFormatList[item->format].size;
- ne = item->elements;
- dest = item->data;
-
- if (!dest || len > item->data_len)
- {
- printf("exif tag %s data size mismatch\n", exif_item_get_tag_name(item));
- return;
- }
-
- switch (item->format)
- {
- case EXIF_FORMAT_UNKNOWN:
- break;
- case EXIF_FORMAT_BYTE_UNSIGNED:
- case EXIF_FORMAT_BYTE:
- case EXIF_FORMAT_UNDEFINED:
- memcpy(dest, src, len);
- break;
- case EXIF_FORMAT_STRING:
- memcpy(dest, src, len);
- /* string is NULL terminated, make sure this is true */
- if (((char *)dest)[len - 1] != '\0') ((char *)dest)[len - 1] = '\0';
- break;
- case EXIF_FORMAT_SHORT_UNSIGNED:
- case EXIF_FORMAT_SHORT:
- for (i = 0; i < ne; i++)
- {
- ((short *)dest)[i] = swab_int16(*(uint16_t*)(src + i * bs), byte_order);
- }
- break;
- case EXIF_FORMAT_LONG_UNSIGNED:
- case EXIF_FORMAT_LONG:
- if (src_format == EXIF_FORMAT_SHORT_UNSIGNED ||
- src_format == EXIF_FORMAT_SHORT)
- {
- /* a short fits into a long, so allow it */
- int ss;
-
- ss = ExifFormatList[src_format].size;
- for (i = 0; i < ne; i++)
- {
- ((long *)dest)[i] = (long)swab_int16(*(uint16_t*)(src + i * ss), byte_order);
- }
- }
- else
- {
- for (i = 0; i < ne; i++)
- {
- ((long *)dest)[i] = swab_int32(*(uint32_t*)(src + i * bs), byte_order);
- }
- }
- break;
- case EXIF_FORMAT_RATIONAL_UNSIGNED:
- case EXIF_FORMAT_RATIONAL:
- for (i = 0; i < ne; i++)
- {
- rational_from_data(&((ExifRational *)dest)[i], src + i * bs, byte_order);
- }
- break;
- case EXIF_FORMAT_FLOAT:
- for (i = 0; i < ne; i++)
- {
- ((float *)dest)[i] = swab_int32(*(uint32_t*)(src + i * bs), byte_order);
- }
- break;
- case EXIF_FORMAT_DOUBLE:
- for (i = 0; i < ne; i++)
- {
- ExifRational r;
-
- rational_from_data(&r, src + i * bs, byte_order);
- if (r.den) ((double *)dest)[i] = (double)r.num / r.den;
- }
- break;
- }
-}
-
-static int parse_IFD_entry(ExifData *exif, unsigned char *tiff, int offset,
- int size, int byte_order)
-{
- IFDEntry *ent = (IFDEntry*)(tiff+offset);
- uint32_t swabed_data;
- void *data;
- int data_len;
- ExifMarker *marker;
- ExifItem *item;
-
- ent->tag = swab_int16(ent->tag, byte_order);
- ent->format = swab_int16(ent->format, byte_order);
- ent->nb = swab_int32(ent->nb, byte_order);
- swabed_data = swab_int32(ent->data, byte_order);
-
- /* Check tag type. If it does not match, either the format is wrong,
- * either it is a unknown tag; so it is not really an error.
- */
- marker = exif_marker_from_tag(ent->tag);
- if (!marker)
- {
- if (ent->format > EXIF_FORMAT_DOUBLE)
- {
- printf("warning: exif tag 0x%4x has invalid format %d\n", ent->tag, ent->format);
- return 0;
- }
- /* allow non recognized tags to be displayed */
- marker = &ExifUnknownMarkersList[ent->format];
- }
- if (marker->format != ent->format)
- {
- /* Some cameras got mixed up signed/unsigned_rational
- * eg KODAK DC4800 on object_distance tag
- *
- * FIXME: what exactly is this test trying to do?
- * ok, so this test is to allow the case of swapped signed/unsigned mismatch to leak through?
- */
- if ( !(marker->format == EXIF_FORMAT_RATIONAL_UNSIGNED && ent->format == EXIF_FORMAT_RATIONAL) &&
- !(marker->format == EXIF_FORMAT_RATIONAL && ent->format == EXIF_FORMAT_RATIONAL_UNSIGNED) &&
- /* short fits into a long so allow this mismatch
- * as well (some tags allowed to be unsigned short _or_ unsigned long)
- */
- !(marker->format == EXIF_FORMAT_LONG_UNSIGNED && ent->format == EXIF_FORMAT_SHORT_UNSIGNED) )
- {
- if (ent->format <= EXIF_FORMAT_DOUBLE)
- {
- printf("warning: exif tag %s format mismatch, found %s exif spec requests %s\n",
- marker->key, ExifFormatList[ent->format].short_name, ExifFormatList[marker->format].short_name);
- }
- else
- {
- printf("warning: exif tag %s format mismatch, found unknown id %d exif spec requests %d (%s)\n",
- marker->key, ent->format, marker->format, ExifFormatList[marker->format].short_name);
- }
- return 0;
- }
- }
-
- /* Where is the data, is it available?
- */
- if (marker->components > 0 && marker->components != ent->nb)
- {
- printf("warning: exif tag %s has %d elements, exif spec requests %d\n", marker->key, ent->nb, marker->components);
- }
- data_len = ExifFormatList[marker->format].size * ent->nb;
- if (data_len > sizeof(ent->data))
- {
- if (size < swabed_data+data_len)
- {
- printf("warning: exif tag %s will overrun IFD segment, ignored.\n", marker->key);
- return -1;
- }
- data = (void*)tiff + swabed_data;
- }
- else
- {
- data = (void*)(&(ent->data));
- }
-
- item = exif_item_new(marker->format, ent->tag, ent->nb, marker);
- exif_item_copy_data(item, data, data_len, ent->format, byte_order);
- exif->items = g_list_prepend(exif->items, item);
-
- if (item->tag == TAG_EXIFOFFSET)
- {
- parse_IFD_table(exif, tiff, swabed_data, size, byte_order);
- }
-
- return 0;
-}
-
-static int parse_IFD_table(ExifData *exif, unsigned char *tiff, int offset,
- int size, int byte_order)
-{
- int i, nb_entries;
-
- /* We should be able to read number of entries in IFD0) */
- if (size < offset+2) return -1;
-
- nb_entries = get_int16(tiff+offset, byte_order);
-
- /* Entries and next IFD offset must be readable */
- if (size < offset+nb_entries*12+4) return -1;
-
- for (i=0; i<nb_entries; ++i)
- {
- parse_IFD_entry(exif, tiff, offset+2+i*sizeof(IFDEntry), size, byte_order);
- }
-
- return 0;
-}
-
-/*
- *-------------------------------------------------------------------
- * file formats
- *-------------------------------------------------------------------
- */
-
-static int parse_TIFF(ExifData *exif, unsigned char *tiff, int size)
-{
- int byte_order, offset=0;
-
- if (size < sizeof(TIFFHeader))
- {
- return -1;
- }
-
- if (strncmp(((TIFFHeader*)tiff)->byte_order, "II", 2) == 0)
- {
- byte_order = BYTE_ORDER_INTEL;
- }
- else if (strncmp(((TIFFHeader*)tiff)->byte_order, "MM", 2) == 0)
- {
- byte_order = BYTE_ORDER_MOTOROLA;
- }
- else
- {
- return -1;
- }
-
- if (swab_int16(((TIFFHeader*)tiff)->magic, byte_order) != 0x002A)
- {
- return -1;
- }
-
- offset = swab_int32(((TIFFHeader*)tiff)->IFD_offset, byte_order);
-
- return parse_IFD_table(exif, tiff, offset, size, byte_order);
-}
-
-static int parse_JPEG(ExifData *exif, unsigned char *f, int size)
-{
- int marker, marker_size;
-
- if (size<2 || *f!=0xFF || *(f+1)!=MARKER_SOI)
- {
- return -2;
- }
-
- do {
- if (goto_next_marker(&f, &size, &marker) == -1)
- {
- break;
- }
- } while (marker != MARKER_APP1);
-
- if (marker != MARKER_APP1)
- {
- return -2;
- }
-
- marker_size = get_marker_size(f)-2;
-
- if (marker_size<6 || strncmp((char*)f+4, "Exif\0\0", 6)!=0)
- {
- return -2;
- }
-
- return parse_TIFF(exif, f+10, marker_size-6);
-}
-
-static gint map_file(const gchar *path, void **mapping, int *size)
-{
- int fd;
- struct stat fs;
-
- if ((fd = open(path, O_RDONLY)) == -1)
- {
- perror(path);
- return -1;
- }
-
- if (fstat(fd, &fs) == -1)
- {
- perror(path);
- close(fd);
- return -1;
- }
-
- *size = fs.st_size;
-
- if ((*mapping = mmap(0, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0)) == MAP_FAILED)
- {
- perror(path);
- close(fd);
- return -1;
- }
-
- close(fd);
- return 0;
-}
-
-static gint unmap_file(void *mapping, int size)
-{
- if (munmap(mapping, size) == -1)
- {
- perror("munmap");
- return -1;
- }
-
- return 0;
-}
-
-void exif_free(ExifData *exif)
-{
- GList *work;
-
- if (!exif) return;
-
- work = exif->items;
- while (work)
- {
- ExifItem *item = work->data;
- work = work->next;
- exif_item_free(item);
- }
-
- g_list_free(exif->items);
- g_free(exif);
-}
-
-ExifData *exif_read(const gchar *path)
-{
- ExifData *exif;
- void *f;
- int size, res;
- gchar *pathl;
-
- if (!path) return NULL;
-
- pathl = path_from_utf8(path);
- if (map_file(pathl, &f, &size) == -1)
- {
- g_free(pathl);
- return NULL;
- }
- g_free(pathl);
-
- exif = g_new0(ExifData, 1);
- exif->items = NULL;
-
- if ((res = parse_JPEG(exif, (unsigned char *)f, size)) == -2)
- {
- res = parse_TIFF(exif, (unsigned char *)f, size);
- }
-
- if (res != 0)
- {
- exif_free(exif);
- exif = NULL;
- }
-
- unmap_file(f, size);
-
- if (exif) exif->items = g_list_reverse(exif->items);
-
-#if 0
- exif_write_data_list(exif, stdout, TRUE);
- exif_write_data_list(exif, stdout, FALSE);
-#endif
-
- return exif;
-}
-
-ExifItem *exif_get_item(ExifData *exif, const gchar *key)
-{
- GList *work;
-
- if (!key) return NULL;
-
- work = exif->items;
- while (work)
- {
- ExifItem *item;
-
- item = work->data;
- work = work->next;
- if (item->marker->key && strcmp(key, item->marker->key) == 0) return item;
- }
- return NULL;
-}
-
-gchar *exif_item_get_data_as_text(ExifItem *item)
-{
- ExifMarker *marker;
- gpointer data;
- GString *string;
- gchar *text;
- gint ne;
- gint i;
-
- if (!item) return NULL;
-
- marker = item->marker;
- if (!marker) return NULL;
-
- data = item->data;
- ne = item->elements;
- string = g_string_new("");
- switch (item->format)
- {
- case EXIF_FORMAT_UNKNOWN:
- break;
- case EXIF_FORMAT_BYTE_UNSIGNED:
- case EXIF_FORMAT_BYTE:
- case EXIF_FORMAT_UNDEFINED:
- if (ne == 1 && marker->list)
- {
- gchar *result;
- unsigned char val;
-
- if (item->format == EXIF_FORMAT_BYTE_UNSIGNED ||
- item->format == EXIF_FORMAT_UNDEFINED)
- {
- val = ((unsigned char *)data)[0];
- }
- else
- {
- val = (unsigned char)(((signed char *)data)[0]);
- }
-
- result = text_list_find_value(marker->list, (unsigned short)val);
- string = g_string_append(string, result);
- g_free(result);
- }
- else
- {
- string = string_append_raw_bytes(string, data, ne);
- }
- break;
- case EXIF_FORMAT_STRING:
- string = g_string_append(string, (gchar *)(item->data));
- break;
- case EXIF_FORMAT_SHORT_UNSIGNED:
- if (ne == 1 && marker->list)
- {
- gchar *result;
-
- result = text_list_find_value(marker->list, ((unsigned short *)data)[0]);
- string = g_string_append(string, result);
- g_free(result);
- }
- else for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%hd", (i > 0) ? ", " : "",
- ((unsigned short *)data)[i]);
- }
- break;
- case EXIF_FORMAT_LONG_UNSIGNED:
- for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%ld", (i > 0) ? ", " : "",
- ((unsigned long *)data)[i]);
- }
- break;
- case EXIF_FORMAT_RATIONAL_UNSIGNED:
- for (i = 0; i < ne; i++)
- {
- ExifRational *r;
-
- r = &((ExifRational *)data)[i];
- g_string_append_printf(string, "%s%ld/%ld", (i > 0) ? ", " : "",
- (unsigned long)r->num, (unsigned long)r->den);
- }
- break;
- case EXIF_FORMAT_SHORT:
- for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%hd", (i > 0) ? ", " : "",
- ((short *)data)[i]);
- }
- break;
- case EXIF_FORMAT_LONG:
- for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%ld", (i > 0) ? ", " : "",
- ((long *)data)[i]);
- }
- break;
- case EXIF_FORMAT_RATIONAL:
- for (i = 0; i < ne; i++)
- {
- ExifRational *r;
-
- r = &((ExifRational *)data)[i];
- g_string_append_printf(string, "%s%ld/%ld", (i > 0) ? ", " : "",
- (long)r->num, (long)r->den);
- }
- break;
- case EXIF_FORMAT_FLOAT:
- for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%f", (i > 0) ? ", " : "",
- ((float *)data)[i]);
- }
- break;
- case EXIF_FORMAT_DOUBLE:
- for (i = 0; i < ne; i++)
- {
- g_string_append_printf(string, "%s%f", (i > 0) ? ", " : "",
- ((double *)data)[i]);
- }
- break;
- }
-
- text = g_strdup(string->str);
- g_string_free(string, TRUE);
-
- return text;
-}
-
-gint exif_item_get_integer(ExifItem *item, gint *value)
-{
- if (!item) return FALSE;
-
- switch (item->format)
- {
- case EXIF_FORMAT_SHORT:
- *value = (gint)(((short *)(item->data))[0]);
- return TRUE;
- break;
- case EXIF_FORMAT_SHORT_UNSIGNED:
- *value = (gint)(((unsigned short *)(item->data))[0]);
- return TRUE;
- break;
- case EXIF_FORMAT_LONG:
- *value = (gint)(((long *)(item->data))[0]);
- return TRUE;
- break;
- case EXIF_FORMAT_LONG_UNSIGNED:
- /* FIXME: overflow possible */
- *value = (gint)(((unsigned long *)(item->data))[0]);
- return TRUE;
- default:
- /* all other type return FALSE */
- break;
- }
- return FALSE;
-}
-
-gint exif_get_integer(ExifData *exif, const gchar *key, gint *value)
-{
- ExifItem *item;
-
- item = exif_get_item(exif, key);
- return exif_item_get_integer(item, value);
-}
-
-ExifRational *exif_item_get_rational(ExifItem *item, gint *sign)
-{
- if (!item) return NULL;
-
- if (item->format == EXIF_FORMAT_RATIONAL ||
- item->format == EXIF_FORMAT_RATIONAL_UNSIGNED)
- {
- if (sign) *sign = (item->format == EXIF_FORMAT_RATIONAL);
- return &((ExifRational *)(item->data))[0];
- }
-
- return NULL;
-}
-
-ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign)
-{
- ExifItem *item;
-
- item = exif_get_item(exif, key);
- return exif_item_get_rational(item, sign);
-}
-
-double exif_rational_to_double(ExifRational *r, gint sign)
-{
- if (!r || r->den == 0.0) return 0.0;
-
- if (sign) return (double)((int)r->num) / (double)((int)r->den);
- return (double)r->num / r->den;
-}
-
-static double exif_get_rational_as_double(ExifData *exif, const gchar *key)
-{
- ExifRational *r;
- gint sign;
-
- r = exif_get_rational(exif, key, &sign);
- return exif_rational_to_double(r, sign);
-}
-
-static GString *append_comma_text(GString *string, const gchar *text)
-{
- string = g_string_append(string, ", ");
- string = g_string_append(string, text);
-
- return string;
-}
-
-static gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid)
-{
- /* must begin with f, else not formatted */
- if (key[0] != 'f')
- {
- if (key_valid) *key_valid = FALSE;
- return NULL;
- }
-
- if (key_valid) *key_valid = TRUE;
-
- if (strcmp(key, "fCamera") == 0)
- {
- gchar *text;
- gchar *make = exif_get_data_as_text(exif, "Make");
- gchar *model = exif_get_data_as_text(exif, "Model");
- gchar *software = exif_get_data_as_text(exif, "Software");
-
- text = g_strdup_printf("%s%s%s%s%s%s", (make) ? make : "", ((make) && (model)) ? " " : "",
- (model) ? model : "",
- (software) ? " (" : "",
- (software) ? software : "",
- (software) ? ")" : "");
-
- g_free(make);
- g_free(model);
- g_free(software);
- return text;
- }
- if (strcmp(key, "fDateTime") == 0)
- {
- gchar *text = exif_get_data_as_text(exif, "DateTimeOriginal");
- gchar *subsec = NULL;
- if (text) subsec = exif_get_data_as_text(exif, "SubsecTimeOriginal");
- if (!text)
- {
- text = exif_get_data_as_text(exif, "DateTime");
- if (text) subsec = exif_get_data_as_text(exif, "SubsecTime");
- }
- if (subsec)
- {
- gchar *tmp = text;
- text = g_strconcat(tmp, ".", subsec, NULL);
- g_free(tmp);
- g_free(subsec);
- }
- return text;
- }
- if (strcmp(key, "fShutterSpeed") == 0)
- {
- ExifRational *r;
-
- r = exif_get_rational(exif, "ExposureTime", NULL);
- if (r && r->num && r->den)
- {
- double n = (double)r->den / (double)r->num;
- return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
- n > 1.0 ? n : 1.0 / n);
- }
- r = exif_get_rational(exif, "ShutterSpeedValue", NULL);
- if (r && r->num && r->den)
- {
- double n = pow(2.0, exif_rational_to_double(r, TRUE));
-
- /* Correct exposure time to avoid values like 1/91s (seen on Minolta DImage 7) */
- if (n > 1.0 && (int)n - ((int)(n/10))*10 == 1) n--;
-
- return g_strdup_printf("%s%.0fs", n > 1.0 ? "1/" : "",
- n > 1.0 ? floor(n) : 1.0 / n);
- }
- return NULL;
- }
- if (strcmp(key, "fAperture") == 0)
- {
- double n;
-
- n = exif_get_rational_as_double(exif, "FNumber");
- if (n == 0.0) n = exif_get_rational_as_double(exif, "ApertureValue");
- if (n == 0.0) return NULL;
-
- return g_strdup_printf("f/%.1f", n);
- }
- if (strcmp(key, "fExposureBias") == 0)
- {
- ExifRational *r;
- gint sign;
- double n;
-
- r = exif_get_rational(exif, "ExposureBiasValue", &sign);
- if (!r) return NULL;
-
- n = exif_rational_to_double(r, sign);
- return g_strdup_printf("%+.1f", n);
- }
- if (strcmp(key, "fFocalLength") == 0)
- {
- double n;
-
- n = exif_get_rational_as_double(exif, "FocalLength");
- if (n == 0.0) return NULL;
- return g_strdup_printf("%.2f mm", n);
- }
- if (strcmp(key, "fISOSpeedRating") == 0)
- {
- gchar *text;
-
- text = exif_get_data_as_text(exif, "ISOSpeedRatings");
- /* kodak may set this instead */
- if (!text) text = exif_get_data_as_text(exif, "ExposureIndex");
- return text;
- }
- if (strcmp(key, "fSubjectDistance") == 0)
- {
- ExifRational *r;
- gint sign;
- double n;
-
- r = exif_get_rational(exif, "SubjectDistance", &sign);
- if (!r) return NULL;
-
- if ((long)r->num == 0xffffffff) return g_strdup(_("infinity"));
- if ((long)r->num == 0) return g_strdup(_("unknown"));
-
- n = exif_rational_to_double(r, sign);
- if (n == 0.0) return _("unknown");
- return g_strdup_printf("%.3f m", n);
- }
- if (strcmp(key, "fFlash") == 0)
- {
- /* grr, flash is a bitmask... */
- GString *string;
- gchar *text;
- gint n;
- gint v;
-
- if (!exif_get_integer(exif, "Flash", &n)) return NULL;
-
- /* Exif 2.1 only defines first 3 bits */
- if (n <= 0x07) return g_strdup(text_list_find_value(ExifFlashList, n));
-
- /* must be Exif 2.2 */
- string = g_string_new("");
-
- /* flash fired (bit 0) */
- string = g_string_append(string, (n & 0x01) ? _("yes") : _("no"));
-
- /* flash mode (bits 3, 4) */
- v = (n >> 3) & 0x03;
- if (v) string = append_comma_text(string, _("mode:"));
- switch (v)
- {
- case 1:
- string = g_string_append(string, _("on"));
- break;
- case 2:
- string = g_string_append(string, _("off"));
- break;
- case 3:
- string = g_string_append(string, _("auto"));
- break;
- }
-
- /* return light (bits 1, 2) */
- v = (n >> 1) & 0x03;
- if (v == 2) string = append_comma_text(string, _("not detected by strobe"));
- if (v == 3) string = append_comma_text(string, _("detected by strobe"));
-
- /* we ignore flash function (bit 5) */
-
- /* red-eye (bit 6) */
- if ((n >> 5) & 0x01) string = append_comma_text(string, _("red-eye reduction"));
-
- text = string->str;
- g_string_free(string, FALSE);
- return text;
- }
- if (strcmp(key, "fResolution") == 0)
- {
- ExifRational *rx, *ry;
- gchar *units;
- gchar *text;
-
- rx = exif_get_rational(exif, "XResolution", NULL);
- ry = exif_get_rational(exif, "YResolution", NULL);
- if (!rx || !ry) return NULL;
-
- units = exif_get_data_as_text(exif, "ResolutionUnit");
- text = g_strdup_printf("%0.f x %0.f (%s/%s)", rx->den ? (double)rx->num / rx->den : 1.0,
- ry->den ? (double)ry->num / ry->den : 1.0,
- _("dot"), (units) ? units : _("unknown"));
-
- g_free(units);
- return text;
- }
-
- if (key_valid) *key_valid = FALSE;
- return NULL;
-}
-
-gchar *exif_get_data_as_text(ExifData *exif, const gchar *key)
-{
- ExifItem *item;
- gchar *text;
- gint key_valid;
-
- if (!key) return NULL;
-
- text = exif_get_formatted_by_key(exif, key, &key_valid);
- if (key_valid) return text;
-
- item = exif_get_item(exif, key);
- if (item) return exif_item_get_data_as_text(item);
-
- return NULL;
-}
-
-const gchar *exif_get_description_by_key(const gchar *key)
-{
- gint i;
-
- if (!key) return NULL;
-
- i = 0;
- while (ExifFormattedList[i].key != NULL)
- {
- if (strcmp(key, ExifFormattedList[i].key) == 0) return _(ExifFormattedList[i].description);
- i++;
- }
-
- i = 0;
- while (ExifKnownMarkersList[i].tag > 0)
- {
- if (strcmp(key, ExifKnownMarkersList[i].key) == 0) return _(ExifKnownMarkersList[i].description);
- i++;
- }
-
- return NULL;
-}
-
-static void exif_write_item(FILE *f, ExifItem *item)
-{
- gchar *text;
-
- text = exif_item_get_data_as_text(item);
- if (text)
- {
- fprintf(f, "%4x %9s %30s %s\n", item->tag, ExifFormatList[item->format].short_name,
- exif_item_get_tag_name(item), text);
- }
- g_free(text);
-}
-
-void exif_write_data_list(ExifData *exif, FILE *f, gint human_readable_list)
-{
- if (!f || !exif) return;
-
- fprintf(f, " tag format key value\n");
- fprintf(f, "----------------------------------------------------\n");
-
- if (human_readable_list)
- {
- gint i;
-
- i = 0;
- while (ExifFormattedList[i].key)
- {
- gchar *text;
-
- text = exif_get_formatted_by_key(exif, ExifFormattedList[i].key, NULL);
- if (text)
- {
- fprintf(f, " %9s %30s %s\n", "string", ExifFormattedList[i].key, text);
- }
- i++;
- }
- }
- else
- {
- GList *work;
-
- work = exif->items;
- while (work)
- {
- ExifItem *item;
-
- item = work->data;
- work = work->next;
-
- exif_write_item(f, item);
- }
- }
- fprintf(f, "----------------------------------------------------\n");
-}
-
projects / geeqie.git / blobdiff