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7be962bfc2
Having subsurface-core as a directory name really messes with autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an autocomplete conflict and also was inconsistent with the desktop-widget name for the directory containing the "other" UI. And while cleaning up the resulting change in the path name for include files, I decided to clean up those even more to make them consistent overall. This could have been handled in more commits, but since this requires a make clean before the build, it seemed more sensible to do it all in one. Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
147 lines
5.9 KiB
C++
147 lines
5.9 KiB
C++
/**************************************************************************
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exif.h -- A simple ISO C++ library to parse basic EXIF
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information from a JPEG file.
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Based on the description of the EXIF file format at:
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-- http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
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-- http://www.media.mit.edu/pia/Research/deepview/exif.html
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-- http://www.exif.org/Exif2-2.PDF
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Copyright (c) 2010-2013 Mayank Lahiri
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mlahiri@gmail.com
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All rights reserved.
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VERSION HISTORY:
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================
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2.1: Released July 2013
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-- fixed a bug where JPEGs without an EXIF SubIFD would not be parsed
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-- fixed a bug in parsing GPS coordinate seconds
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-- fixed makefile bug
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-- added two pathological test images from Matt Galloway
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http://www.galloway.me.uk/2012/01/uiimageorientation-exif-orientation-sample-images/
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-- split main parsing routine for easier integration into Firefox
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2.0: Released February 2013
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-- complete rewrite
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-- no new/delete
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-- added GPS support
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1.0: Released 2010
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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-- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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-- Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef EXIF_H
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#define EXIF_H
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#include <string>
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//
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// Class responsible for storing and parsing EXIF information from a JPEG blob
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//
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class EXIFInfo {
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public:
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// Parsing function for an entire JPEG image buffer.
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//
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// PARAM 'data': A pointer to a JPEG image.
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// PARAM 'length': The length of the JPEG image.
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// RETURN: PARSE_EXIF_SUCCESS (0) on succes with 'result' filled out
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// error code otherwise, as defined by the PARSE_EXIF_ERROR_* macros
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int parseFrom(const unsigned char *data, unsigned length);
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int parseFrom(const std::string &data);
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// Parsing function for an EXIF segment. This is used internally by parseFrom()
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// but can be called for special cases where only the EXIF section is
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// available (i.e., a blob starting with the bytes "Exif\0\0").
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int parseFromEXIFSegment(const unsigned char *buf, unsigned len);
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// Set all data members to default values.
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void clear();
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// Data fields filled out by parseFrom()
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char ByteAlign; // 0 = Motorola byte alignment, 1 = Intel
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std::string ImageDescription; // Image description
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std::string Make; // Camera manufacturer's name
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std::string Model; // Camera model
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unsigned short Orientation; // Image orientation, start of data corresponds to
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// 0: unspecified in EXIF data
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// 1: upper left of image
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// 3: lower right of image
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// 6: upper right of image
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// 8: lower left of image
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// 9: undefined
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unsigned short BitsPerSample; // Number of bits per component
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std::string Software; // Software used
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std::string DateTime; // File change date and time
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std::string DateTimeOriginal; // Original file date and time (may not exist)
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std::string DateTimeDigitized; // Digitization date and time (may not exist)
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std::string SubSecTimeOriginal; // Sub-second time that original picture was taken
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std::string Copyright; // File copyright information
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double ExposureTime; // Exposure time in seconds
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double FNumber; // F/stop
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unsigned short ISOSpeedRatings; // ISO speed
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double ShutterSpeedValue; // Shutter speed (reciprocal of exposure time)
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double ExposureBiasValue; // Exposure bias value in EV
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double SubjectDistance; // Distance to focus point in meters
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double FocalLength; // Focal length of lens in millimeters
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unsigned short FocalLengthIn35mm; // Focal length in 35mm film
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char Flash; // 0 = no flash, 1 = flash used
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unsigned short MeteringMode; // Metering mode
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// 1: average
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// 2: center weighted average
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// 3: spot
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// 4: multi-spot
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// 5: multi-segment
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unsigned ImageWidth; // Image width reported in EXIF data
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unsigned ImageHeight; // Image height reported in EXIF data
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struct Geolocation_t
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{ // GPS information embedded in file
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double Latitude; // Image latitude expressed as decimal
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double Longitude; // Image longitude expressed as decimal
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double Altitude; // Altitude in meters, relative to sea level
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char AltitudeRef; // 0 = above sea level, -1 = below sea level
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struct Coord_t {
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double degrees;
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double minutes;
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double seconds;
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char direction;
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} LatComponents, LonComponents; // Latitude, Longitude expressed in deg/min/sec
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} GeoLocation;
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EXIFInfo()
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{
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clear();
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}
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time_t epoch();
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};
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// Parse was successful
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#define PARSE_EXIF_SUCCESS 0
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// No JPEG markers found in buffer, possibly invalid JPEG file
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#define PARSE_EXIF_ERROR_NO_JPEG 1982
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// No EXIF header found in JPEG file.
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#define PARSE_EXIF_ERROR_NO_EXIF 1983
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// Byte alignment specified in EXIF file was unknown (not Motorola or Intel).
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#define PARSE_EXIF_ERROR_UNKNOWN_BYTEALIGN 1984
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// EXIF header was found, but data was corrupted.
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#define PARSE_EXIF_ERROR_CORRUPT 1985
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#endif // EXIF_H
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