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#
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# dexif.py - simple EXIF processing for Degal
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# Copyright (C) 2008, Santtu Pajukanta <santtu@pajukanta.fi>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the
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# Free Software Foundation, Inc.,
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# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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from subprocess import Popen, PIPE
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# TODO This should be user configurable
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EXIFTOOL="/usr/bin/exiftool"
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outputTags = [
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# TODO Create date is in a useless format, needs some strptime love
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("CreateDate", "Create date"),
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("Model", "Camera model"),
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("Aperture", "Aperture"),
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("ExposureMode", "Exposure mode"),
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("ExposureCompensation", "Exposure compensation"),
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("ExposureTime", "Exposure time"),
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("Flash", "Flash mode"),
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("ISO", "ISO"),
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("ShootingMode", "Shooting mode"),
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("LensType", "Lens type"),
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("FocalLength", "Focal length")
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]
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class ExifError(Exception):
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pass
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def parse_exif(filepath):
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"""parse_exif(filepath :: String) -> [(String, String)]
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Parse EXIF tags from an image file and return them in a dict.
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"""
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args = [EXIFTOOL, "-s", "-t", filepath]
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etproc = Popen(args, stdout = PIPE)
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output, errors = etproc.communicate()
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if etproc.returncode < 0:
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raise ExifError, "exiftool terminated by signal %d" % (-etproc.returnco)
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elif etproc.returncode > 0:
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raise ExifError, "exiftool failed with return code %d" % etproc.returncode
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tags = dict(line.split("\t", 1) for line in output.split("\n") if line)
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result = [(descr, tags[key]) for (key, descr) in outputTags if tags.has_key(key)]
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return result
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