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Initial port from Google Code.
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Mayank Lahiri committed Dec 3, 2014
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9 changes: 9 additions & 0 deletions CONTRIBUTORS
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The following people have contributed patches or issues to EasyEXIF:

Seth Fowler
Val Malykh
Carlos Apablaza Brito
Simon Fuhrmann
Toshiaki Ohkuma
pet.b.hunt
Jason Moey
36 changes: 18 additions & 18 deletions LICENSE
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Copyright (c) 2014, Mayank Lahiri
Copyright (c) 2010-2015 Mayank Lahiri
mlahiri@gmail.com
All rights reserved.

Redistribution and use in source and binary forms, with or without
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 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.

* 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 AND CONTRIBUTORS "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 COPYRIGHT HOLDER 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.
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.

72 changes: 71 additions & 1 deletion README.md
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easyexif
========

Tiny ISO-compliant C++ EXIF parsing library, third-party dependency free.
A tiny ISO-compliant C++ EXIF parsing library.

EasyEXIF is a tiny, lightweight C++ library that parses basic information out of EXIF files. It uses only the std::string library and is otherwise pure C++. You pass it the the binary contents of an entire JPEG file, and it parses out a few of the most important EXIF fields for you.

Why use this library? __Include one .h file, compile one .cc file, and that's it.__

Sometimes you just need to quickly extract basic information from a JPEG file's EXIF headers: the time the image was taken (not the file timestamp, the camera's internal time), the F-stop or exposure time, GPS information embedded in the EXIF file, what the camera make and model was, etc. Unfortunately, all the EXIF libraries out there are not very lightweight or easy to integrate into larger programs. EasyEXIF aims to solve that problem, and is released under a very liberal BSD License for use practically anywhere.

### Features:

1. Supports common Exif fields including GPS, ISO speed, etc.
2. Extensively documented in the source.
3. Valgrind tested for memory leaks.
4. Handles corrupt JPEGs.
5. Compiles without complaints using `-Wall -Wextra -Werror -pedantic -ansi` on gcc v4.8.2
6. No uses of new/malloc.

### License

BSD.

### Contributions

Reasonable pull requests are gladly accepted.

The following people have committed patches to EasyExif.

* Seth Fowler
* Val Malykh
* Carlos Apablaza Brito
* Simon Fuhrmann
* Toshiaki Ohkuma
* pet.b.hunt
* Jason Moey


### Example:


```C++
#include "exif.h"

EXIFInfo result;
result.parseFrom(JPEGFileBuffer, BufferSize);

printf("Camera make : %s\n", result.Make.c_str());
printf("Camera model : %s\n", result.Model.c_str());
printf("Software : %s\n", result.Software.c_str());
printf("Bits per sample : %d\n", result.BitsPerSample);
printf("Image width : %d\n", result.ImageWidth);
printf("Image height : %d\n", result.ImageHeight);
printf("Image description : %s\n", result.ImageDescription.c_str());
printf("Image orientation : %d\n", result.Orientation);
printf("Image copyright : %s\n", result.Copyright.c_str());
printf("Image date/time : %s\n", result.DateTime.c_str());
printf("Original date/time: %s\n", result.DateTimeOriginal.c_str());
printf("Digitize date/time: %s\n", result.DateTimeDigitized.c_str());
printf("Subsecond time : %s\n", result.SubSecTimeOriginal.c_str());
printf("Exposure time : 1/%d s\n", (unsigned) (1.0/result.ExposureTime));
printf("F-stop : f/%.1f\n", result.FNumber);
printf("ISO speed : %d\n", result.ISOSpeedRatings);
printf("Subject distance : %f m\n", result.SubjectDistance);
printf("Exposure bias : %f EV\n", result.ExposureBiasValue);
printf("Flash used? : %d\n", result.Flash);
printf("Metering mode : %d\n", result.MeteringMode);
printf("Lens focal length : %f mm\n", result.FocalLength);
printf("35mm focal length : %u mm\n", result.FocalLengthIn35mm);
printf("GPS Latitude : %f deg\n", result.GeoLocation.Latitude);
printf("GPS Longitude : %f deg\n", result.GeoLocation.Longitude);
printf("GPS Altitude : %f m\n", result.GeoLocation.Altitude);
```
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74 changes: 74 additions & 0 deletions demo.cpp
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#include <stdio.h>
#include "exif.h"

int main(int argc, char *argv[]) {
if (argc < 2) {
printf("Usage: demo <JPEG file>\n");
return -1;
}

// Read the JPEG file into a buffer
FILE *fp = fopen(argv[1], "rb");
if (!fp) {
printf("Can't open file.\n");
return -1;
}
fseek(fp, 0, SEEK_END);
unsigned long fsize = ftell(fp);
rewind(fp);
unsigned char *buf = new unsigned char[fsize];
if (fread(buf, 1, fsize, fp) != fsize) {
printf("Can't read file.\n");
delete[] buf;
return -2;
}
fclose(fp);

// Parse EXIF
EXIFInfo result;
int code = result.parseFrom(buf, fsize);
delete[] buf;
if (code) {
printf("Error parsing EXIF: code %d\n", code);
return -3;
}

// Dump EXIF information
printf("Camera make : %s\n", result.Make.c_str());
printf("Camera model : %s\n", result.Model.c_str());
printf("Software : %s\n", result.Software.c_str());
printf("Bits per sample : %d\n", result.BitsPerSample);
printf("Image width : %d\n", result.ImageWidth);
printf("Image height : %d\n", result.ImageHeight);
printf("Image description : %s\n", result.ImageDescription.c_str());
printf("Image orientation : %d\n", result.Orientation);
printf("Image copyright : %s\n", result.Copyright.c_str());
printf("Image date/time : %s\n", result.DateTime.c_str());
printf("Original date/time: %s\n", result.DateTimeOriginal.c_str());
printf("Digitize date/time: %s\n", result.DateTimeDigitized.c_str());
printf("Subsecond time : %s\n", result.SubSecTimeOriginal.c_str());
printf("Exposure time : 1/%d s\n", (unsigned) (1.0/result.ExposureTime));
printf("F-stop : f/%.1f\n", result.FNumber);
printf("ISO speed : %d\n", result.ISOSpeedRatings);
printf("Subject distance : %f m\n", result.SubjectDistance);
printf("Exposure bias : %f EV\n", result.ExposureBiasValue);
printf("Flash used? : %d\n", result.Flash);
printf("Metering mode : %d\n", result.MeteringMode);
printf("Lens focal length : %f mm\n", result.FocalLength);
printf("35mm focal length : %u mm\n", result.FocalLengthIn35mm);
printf("GPS Latitude : %f deg (%f deg, %f min, %f sec %c)\n",
result.GeoLocation.Latitude,
result.GeoLocation.LatComponents.degrees,
result.GeoLocation.LatComponents.minutes,
result.GeoLocation.LatComponents.seconds,
result.GeoLocation.LatComponents.direction);
printf("GPS Longitude : %f deg (%f deg, %f min, %f sec %c)\n",
result.GeoLocation.Longitude,
result.GeoLocation.LonComponents.degrees,
result.GeoLocation.LonComponents.minutes,
result.GeoLocation.LonComponents.seconds,
result.GeoLocation.LonComponents.direction);
printf("GPS Altitude : %f m\n", result.GeoLocation.Altitude);

return 0;
}
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