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authorGravatar Tomaz Canabrava <tomaz.canabrava@intel.com>2014-06-02 18:28:02 -0300
committerGravatar Dirk Hohndel <dirk@hohndel.org>2014-06-02 23:59:29 -0700
commitd95d1735b5f0fec2941696a4bb1720eb00a6f59c (patch)
treeeae15bb2c25d051150292de7b17429d074c65d36 /qt-ui/exif.h
parent13e8aba7daee2104c859e17de3363a24c5a885c0 (diff)
downloadsubsurface-d95d1735b5f0fec2941696a4bb1720eb00a6f59c.tar.gz
Break picture handling code from C++ to C.
This commit breaks the loading of images that were done in the divelist into smaller bits. A bit of code refactor was done in order to correct the placement of a few methods. ShiftTimesDialog::EpochFromExiv got moved to Exif::epoch dive_add_picture is now used instead of add_event picture_load_exif_data got implemented using the old listview code. dive_set_geodata_from_picture got implemented using the old listview code. Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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diff --git a/qt-ui/exif.h b/qt-ui/exif.h
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-/**************************************************************************
- exif.h -- A simple ISO C++ library to parse basic EXIF
- information from a JPEG file.
-
- Based on the description of the EXIF file format at:
- -- http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
- -- http://www.media.mit.edu/pia/Research/deepview/exif.html
- -- http://www.exif.org/Exif2-2.PDF
-
- Copyright (c) 2010-2013 Mayank Lahiri
- mlahiri@gmail.com
- All rights reserved.
-
- VERSION HISTORY:
- ================
-
- 2.1: Released July 2013
- -- fixed a bug where JPEGs without an EXIF SubIFD would not be parsed
- -- fixed a bug in parsing GPS coordinate seconds
- -- fixed makefile bug
- -- added two pathological test images from Matt Galloway
- http://www.galloway.me.uk/2012/01/uiimageorientation-exif-orientation-sample-images/
- -- split main parsing routine for easier integration into Firefox
-
- 2.0: Released February 2013
- -- complete rewrite
- -- no new/delete
- -- added GPS support
-
- 1.0: Released 2010
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- -- Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- -- Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESS
- OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-#ifndef EXIF_H
-#define EXIF_H
-
-#include <string>
-
-//
-// Class responsible for storing and parsing EXIF information from a JPEG blob
-//
-class EXIFInfo {
-public:
- // Parsing function for an entire JPEG image buffer.
- //
- // PARAM 'data': A pointer to a JPEG image.
- // PARAM 'length': The length of the JPEG image.
- // RETURN: PARSE_EXIF_SUCCESS (0) on succes with 'result' filled out
- // error code otherwise, as defined by the PARSE_EXIF_ERROR_* macros
- int parseFrom(const unsigned char *data, unsigned length);
- int parseFrom(const std::string &data);
-
- // Parsing function for an EXIF segment. This is used internally by parseFrom()
- // but can be called for special cases where only the EXIF section is
- // available (i.e., a blob starting with the bytes "Exif\0\0").
- int parseFromEXIFSegment(const unsigned char *buf, unsigned len);
-
- // Set all data members to default values.
- void clear();
-
- // Data fields filled out by parseFrom()
- char ByteAlign; // 0 = Motorola byte alignment, 1 = Intel
- std::string ImageDescription; // Image description
- std::string Make; // Camera manufacturer's name
- std::string Model; // Camera model
- unsigned short Orientation; // Image orientation, start of data corresponds to
- // 0: unspecified in EXIF data
- // 1: upper left of image
- // 3: lower right of image
- // 6: upper right of image
- // 8: lower left of image
- // 9: undefined
- unsigned short BitsPerSample; // Number of bits per component
- std::string Software; // Software used
- std::string DateTime; // File change date and time
- std::string DateTimeOriginal; // Original file date and time (may not exist)
- std::string DateTimeDigitized; // Digitization date and time (may not exist)
- std::string SubSecTimeOriginal; // Sub-second time that original picture was taken
- std::string Copyright; // File copyright information
- double ExposureTime; // Exposure time in seconds
- double FNumber; // F/stop
- unsigned short ISOSpeedRatings; // ISO speed
- double ShutterSpeedValue; // Shutter speed (reciprocal of exposure time)
- double ExposureBiasValue; // Exposure bias value in EV
- double SubjectDistance; // Distance to focus point in meters
- double FocalLength; // Focal length of lens in millimeters
- unsigned short FocalLengthIn35mm; // Focal length in 35mm film
- char Flash; // 0 = no flash, 1 = flash used
- unsigned short MeteringMode; // Metering mode
- // 1: average
- // 2: center weighted average
- // 3: spot
- // 4: multi-spot
- // 5: multi-segment
- unsigned ImageWidth; // Image width reported in EXIF data
- unsigned ImageHeight; // Image height reported in EXIF data
- struct Geolocation_t
- { // GPS information embedded in file
- double Latitude; // Image latitude expressed as decimal
- double Longitude; // Image longitude expressed as decimal
- double Altitude; // Altitude in meters, relative to sea level
- char AltitudeRef; // 0 = above sea level, -1 = below sea level
- struct Coord_t {
- double degrees;
- double minutes;
- double seconds;
- char direction;
- } LatComponents, LonComponents; // Latitude, Longitude expressed in deg/min/sec
- } GeoLocation;
- EXIFInfo()
- {
- clear();
- }
-};
-
-// Parse was successful
-#define PARSE_EXIF_SUCCESS 0
-// No JPEG markers found in buffer, possibly invalid JPEG file
-#define PARSE_EXIF_ERROR_NO_JPEG 1982
-// No EXIF header found in JPEG file.
-#define PARSE_EXIF_ERROR_NO_EXIF 1983
-// Byte alignment specified in EXIF file was unknown (not Motorola or Intel).
-#define PARSE_EXIF_ERROR_UNKNOWN_BYTEALIGN 1984
-// EXIF header was found, but data was corrupted.
-#define PARSE_EXIF_ERROR_CORRUPT 1985
-
-#endif // EXIF_H